Title of Invention: Tire, and tire manufacturing method Abstract: Provided is a tire having at least a circular tire frame formed of a thermoplastic resin material, the tire including a reinforcing cord member that forms a reinforcing cord layer on the outer circumference of the tire frame, and the thermoplastic resin material including at least a polyamide-based thermoplastic elastomer. Detailed Description: Part general_description_paragraphs: Part TECHNICAL FIELD: The present invention relates to a tire for being fitted on the rim, and more particularly, to a tire in which at least a portion is formed of a thermoplastic material, and a method for producing the same. Part BACKGROUND ART: Conventionally, in vehicles such as passenger cars, pneumatic tires constructed from rubber, organic fiber materials, steel members, and the like have been used. In recent years, an investigation is conducted to use resin materials, particularly thermoplastic resins and thermoplastic elastomers as the tire materials, in view of weight reduction, ease of molding, and easy recycling. For example, Japanese Patent Application Publication (JP-A) No. 2003-104008 and JP-A No. 03-143701 disclose pneumatic tires formed by using thermoplastic polymer materials. In JP-A No. 03-143701, a reinforcing layer in which a reinforcing cord is helically wound continuously in the circumferential direction of the tire is provided on the outer surface in the tire radial direction at the tread bottom of the tire main body (tire frame), to improve the resistance to cutting or resistance to puncture of the tire main body. Part DISCLOSURE OF INVENTION: Part Technical Problem: Tires that in which a thermoplastic polymer material is used can be produced easily and inexpensively compared to the conventional tires made of rubber. However, when the tire frame is formed of a uniform thermoplastic polymer material which is not equipped with a reinforcing member such as a carcass ply, there is room for improvement from the viewpoint of the resistance to stress, internal pressure and the like, compared to the conventional tires made of rubber (see, for example, JP-A No. 2003-104008). Furthermore, conventional rubber tires cannot be easily recycled, and recycling applications thereof are limited, for example, incinerating the tires, or crushing the tires to be used in the material for road pavement. On the other hand, tires in which a thermoplastic polymer material is used have an advantage that the degree of freedom of the applications is high, even from the viewpoint of recycling. In JP-A No. 03-143701, a reinforcing layer in which a reinforcing cord is helically wound continuously in the circumferential direction of the tire is provided on the outer surface in the tire radial direction of the tread bottom of the tire main body (tire frame) to improve the resistance to cutting or the resistance to puncture of the tire main body. However, when a reinforcing layer in which a reinforcing cord is helically wound directly around a tire frame formed of a thermoplastic polymer material, is formed, and a tread is formed on the outer side in the radial direction of the reinforcing layer, even though an adhesive is used for the reinforcing cord, it cannot be said that sufficient adhesiveness is provided, and there may be air remaining around the reinforcing cords. As such, if air remains around the reinforcing cord, the reinforcing cord may move at the time of driving and cause detachment between the members. Thus, there is room for an improvement from the viewpoint of the durability of tires. Furthermore, since the region around the reinforcing cord is all covered with a cushion rubber, detachment of the reinforcing cord and the like may occur as a result of the difference in the hardness of materials between the tire main body and the region around the reinforcing cord. Also, when a tire is produced by using a thermoplastic polymer material, it is demanded to realize a performance (required characteristics of the tire) that is comparable to that of the conventional rubber tires, while realizing low cost by increasing the production efficiency. For example, when a thermoplastic resin material is used as the material for a tire frame, it can be considered, from the viewpoint of production efficiency and the like, to form the tire frame by injecting a polymer material into a mold by injection molding as described in JP-A No. 03-143701. Accordingly, as the thermoplastic polymer material, it is desirable to select a material which is excellent in the durability obtainable when the material is produced into a tire, and in the handleability at the time of molding (manufacturability) (first, third, fourth, and seventh to thirteenth aspects of the present invention as described below). Furthermore, for example, a tire is required to have strong resistance to impact; however, it is requested that tires formed by using a thermoplastic polymer material also have impact resistance that is equal to or higher than the impact resistance of conventional tires made of rubber (second aspect of the present invention as described below). Furthermore, regarding the characteristics required of tires, for example, factors such as having an elastic modulus in a certain range, having a low dynamic loss factor at 30° C., 20 Hz and a shear strain of 1% (coefficient of rolling: tan δ (hereinafter, may be simply referred to as “tan δ”)), having excellent heat resistance, and the like respectively constitute important characteristics. However, decrease in the tan δ value and increase in the elastic modulus in a polymer material are usually in a contradictory relationship. Accordingly, it is desired to develop a tire which can achieve a good balance between these characteristics at a high level (fifth aspect of the present invention as described below). Also, on the other hand, use of a thermoplastic resin material in a tire tends to further increase the electrostatic property of the tire surface. Since electrostatic charging of a tire may cause the occurrence of discharge, and adhesion of fine dust and the like to the tire surface, a tire in which a thermoplastic resin material is used and which has a superior antistatic ability is desired. However, no such tire has been provided yet (sixth aspect as described below). The present invention was achieved in view of the various circumstances described above. An object according to a first aspect of the present invention is to provide a tire which is formed using a thermoplastic polymer material and exhibits excellent durability and manufacturability. An object according to a second aspect of the present invention is to provide a tire which is formed using a thermoplastic polymer material and exhibits excellent durability, manufacturability and impact resistance. An object according to a third aspect of the present invention is to provide a tire which is formed using a thermoplastic resin material and has excellent tensile elasticity and fracture properties, and a method for producing this tire. An object according to a fourth aspect of the present invention is to provide a tire which is formed using a thermoplastic resin material and exhibits excellent steering stability with small rolling resistance. An object according to a fifth aspect of the present invention is to provide a tire which is formed using a thermoplastic polymer material, is highly elastic, has a low loss factor, and exhibits excellent heat resistance. An object according to a sixth aspect of the present invention is to provide a tire which is formed using a thermoplastic resin material and has an excellent antistatic performance. An object according to a seventh aspect of the present invention is to provide a tire which is formed using a thermoplastic resin material, and in which even if the elastic modulus is increased, an increase in rolling resistance can be suppressed. An object according to an eighth aspect of the present invention is to provide a tire which is formed using a resin material, and in which an elastic modulus in a suitable range can be obtained and an increase in rolling resistance can be suppressed. An object according to a ninth aspect of the present invention is to provide a tire which is formed using a resin material and in which impact resistance can be enhanced. An object according to a tenth aspect of the present invention is to provide a tire which is formed using a thermoplastic resin material, has high durability at the time of driving since air is prevented from remaining in a region around the reinforcing cord member, and is not easily affected by temperature change. An object according to an eleventh aspect of the present invention is to provide a tire which is formed using a thermoplastic resin material and has excellent impact resistance, and in which the temperature dependency of the tensile yield strength is suppressed. An object according to a twelfth aspect of the present invention is to provide a tire which is formed using a thermoplastic resin material and has excellent impact resistance and fracture properties, and a method for producing a tire with excellent productivity. An object according to a thirteenth aspect of the present invention is to provide a tire which is formed using a thermoplastic resin material, and has excellent impact resistance since air is prevented from remaining in a region around the reinforcing cords. Part Solution to Problem: The means for solving the problem of the first aspect is as follows. (1-1) The tire of the first aspect of the present invention is a tire including at least a circular tire frame formed of a thermoplastic resin material, in which the tire includes a reinforcing cord member that forms a reinforcing cord layer on the outer circumference of the tire frame, and the thermoplastic resin material includes at least a polyamide-based thermoplastic elastomer. The reinforcing cord layer may be wound around the outer circumference of the tire frame in the circumferential direction, or may also be wound around the outer circumference in a crossing manner. The tire of the first aspect of the present invention includes a circular tire frame formed of a thermoplastic resin material including a polyamide-based thermoplastic elastomer. The “polyamide-based thermoplastic elastomer” means a thermoplastic resin material which is formed of a copolymer including a polymer constituting a hard segment that is crystalline and has a high melting point, and a polymer constituting a soft segment that is non-crystalline and has a low glass transition temperature, and which has an amide bond (—CONH—) in the main chain of the polymer constituting the hard segment. Furthermore, the “thermoplastic resin” means a resin having thermoplasticity, and does not encompass conventional vulcanized rubbers such as natural rubber or synthetic rubbers. Polyamide-based thermoplastic elastomers have an advantage that when used as a material for forming tire frames, the elastomers have heat resistance and also exhibit excellent tensile modulus of elasticity, tensile strength and fracture strain. Also, when a thermoplastic resin material including a polyamide-based thermoplastic elastomer is used in a tire frame, the structure of the tire can be simplified as compared with the conventional tires made of rubber, and as a result, weight reduction of the tire can be realized. Therefore, when a tire frame is formed using the thermoplastic resin material, the abrasion resistance and durability of the tire can be enhanced. In addition, since a thermoplastic resin material including a polyamide-based thermoplastic elastomer can have the melting point set to near 100° C. to 250° C., it is easy to handle the resin material, and energy consumption at the time of forming a tire frame can be suppressed, while productivity can be increased. In an embodiment of the tire of the first aspect of the present invention, the reinforcing cord member is wound around the outer circumference of a tire frame formed of a thermoplastic resin material including a polyamide-based thermoplastic elastomer, and thus a reinforcing cord layer is formed. When a reinforcing cord layer is formed on the outer circumference of the tire frame, the resistance to puncture and resistance to cutting of the tire, and the rigidity in the circumferential direction of the tire (tire frame) are increased. Also, as the rigidity in the circumferential direction is increased, creeping (a phenomenon in which plastic deformation of the tire frame increases with time under a constant stress) in the tire frame formed of a thermoplastic material is suppressed. Furthermore, a polyamide-based thermoplastic elastomer can easily penetrate not only between the fibers of the reinforcing cord member itself, but also between twisted cords in the case where the reinforcing cord member has a twisted-fiber structure, due to the low melt viscosity of the elastomer. Accordingly, the polyamide-based thermoplastic elastomer has high adhesiveness to reinforcing cord members, and has excellent fixing performance such as welding strength. Also, when the reinforcing cord member is an organic fiber, since the polyamide-based thermoplastic elastomer that forms the tire frame can be welded to the reinforcing cord member, high welding properties and excellent fixing performance are obtained. Further, since a polyamide-based thermoplastic elastomer exhibits excellent elongation, the fracture properties are excellent. Therefore, for example, the phenomenon in which air remains in the region around the reinforcing cord members in the reinforcing cord winding step (incorporation of air) can be suppressed. If the polyamide-based thermoplastic elastomer has high adhesiveness and welding properties to the reinforcing cords, and incorporation of air into the surroundings of the reinforcing cord members is suppressed, the movement of the reinforcing cord members due to, for example, a force applied during driving can be effectively suppressed. Thereby, for example, even in the case where a tire-constituting members is provided so as to cover the entirety of the reinforcing cord members in the outer circumference of the tire frame, since the movement of the reinforcing cord members is suppressed, detachment or the like between these members (including the tire frame) is prevented from occurring, and durability of the tire is enhanced. (1-2) The tire of the first aspect of the present invention can be configured such that the reinforcing cord layer contains a resin material. As such, when the reinforcing cord layer contains a resin material, the difference in hardness between the tire and the reinforcing cord layer can be decreased as compared with the case where the reinforcing cord member is fixed with a cushion rubber, and therefore, the reinforcing cord member can be adhered and fixed to the tire frame further. Thereby, the incorporation of air as described above can be effectively prevented, and the movement of the reinforcing cord member at the time of driving can be effectively suppressed. Furthermore, when the reinforcing cord member is a steel cord, if an attempt is made to separate the reinforcing cords from the cushion rubber at the time of disposal of the tire, while it is difficult to separate a vulcanized rubber from the reinforcing cord only by heating, a resin material can be separated from the reinforcing cord member by heating only. Therefore, it is advantageous in view of recyclability of the tire. Furthermore, a resin material usually has a lower loss factor (tan δ) compared to vulcanized rubbers. Accordingly, if the reinforcing cord layer contains a large amount of a resin material, the rolling properties of the tire can be enhanced. Moreover, a resin having a relatively high elastic modulus compared to vulcanized rubbers is advantageous in that the resin has high in-plane shear rigidity, and also exhibits excellent steering stability at the time of tire driving, and excellent abrasion resistance. In regard to the first aspect of the present invention, if the expression “resin” is used alone, the “resin” is a concept which encompasses thermoplastic resins (including thermoplastic elastomers) and thermosetting resins, and does not encompass vulcanized rubbers. When the reinforcing cord layer contains a resin material, from the viewpoint of increasing the pull-out properties (difficulty to be pulled out) of the reinforcing cords, the reinforcing cord members are preferably covered by a resin material over 20% or more of the surface, and more preferably 50% or more of the surface. Also, the content of the resin material in the reinforcing cord layer is preferably 20 mass % or more, and more preferably 50 mass % or more, relative to the total amount of the materials that constitute the reinforcing cord layer excluding the reinforcing cords, from the viewpoint of increasing the pull-out properties of the reinforcing cord. In order to configure the reinforcing cord layer to include a resin material, for example, the reinforcing cord layer can be formed in a configuration such that when viewed from a cross-section of the tire frame along the axial direction, at least a portion of the reinforcing cord member is embedded in the outer circumference of the tire frame that is formed of a thermoplastic resin material. In this case, the thermoplastic resin material including a polyamide-based thermoplastic elastomer of the outer circumference of the tire frame in which the reinforcing cord member is embedded corresponds to the resin material as a component of the reinforcing cord layer, and the polyamide-based thermoplastic elastomer (thermoplastic resin material) forming the tire frame and the reinforcing cord member constitute the reinforcing cord layer. Furthermore, in order to configure the reinforcing cord layer to include a resin material, a coated cord member obtained by coating a reinforcing cord with a resin material of the same kind as or a different from the resin material that forms the tire frame, may be wound in the circumferential direction of the tire frame. The “same kind” as used for resin material means a situation in which both are ester-based resin materials, or both are styrene-based resin materials, or the like. (1-3) The tire of the first aspect of the present invention can be configured such that the melting point of the thermoplastic resin material including a polyamide-based thermoplastic elastomer is 100° C. to 250° C. As such, when the melting point of the thermoplastic resin material including a polyamide-based thermoplastic elastomer is adjusted to 100° C. to 250° C., a balance can be achieved between durability as the tire performance, and manufacturability in view of reducing the production cost. (1-4) The tire of the first aspect of the present invention can be configured such that the content ratio of the polyamide-based thermoplastic elastomer in the thermoplastic resin material is 50 mass % to 100 mass %. When the content of the polyamide-based thermoplastic elastomer in the thermoplastic resin material is 50 mass % to 100 mass %, the performance of the polyamide-based thermoplastic elastomer can be sufficiently exhibited, and a balance can be achieved between durability as the tire performance, and handleability or manufacturability in view of reducing the production cost. The tire of the first aspect of the present invention can be produced by a production method which includes a tire frame piece forming step of forming a tire frame piece for constituting a portion of a circular tire frame, using a thermoplastic resin material including at least a polyamide-based thermoplastic elastomer; a tire frame piece bonding step of forming the tire frame by fusing two or more of the tire frame pieces, which make a pair, by applying heat to bonding surfaces of the tire frame pieces; and a reinforcing cord member winding step of winding a reinforcing cord members around the outer circumference of the tire frame in the circumferential direction to form a reinforcing cord layer. In the production method described above, tire frame pieces of the circular tire frame are formed using a thermoplastic resin material including a polyamide-based thermoplastic elastomer. Since the polyamide-based thermoplastic elastomer can have its melting point set to about 100° C. to 250° C., for example, it is not necessary to carry out a process of fusing the tire frame pieces at or above 300° C., and the process of fusing can be carried out at a relatively low temperature. As such, since the process of fusing can be carried out at a relatively low temperature, from the viewpoint of energy availability or the like, the tire productivity can be increased. Furthermore, when tire frame pieces in which a thermoplastic resin material including a polyamide-based thermoplastic elastomer are fused to form a tire frame, sufficient adhesive strength between the tire frame pieces can be obtained, and the performance of the frame itself is not deteriorated by the temperature at the time of fusion. Therefore, durability at the time of driving, such as the resistance to puncture or abrasion resistance of the tire thus produced can be increased. The production method can be configured such that in the tire frame piece bonding step, the bonding surface of the tire frame piece is heated to a temperature equal to or higher than the melting point of the thermoplastic resin material that constitutes the tire frame piece (for example, melting point +10° C. to +150° C.). As such, when the bonding surface of the divided body is heated to a temperature higher than or equal to the melting point of the thermoplastic resin material that constitutes the tire frame piece, since fusion between the tire frame pieces can be sufficiently achieved, productivity of the tire can be increased, while durability of the tire is enhanced. The means for solving the problem of the second aspect is as follows. (2-1) The tire of the second aspect of the present invention is a tire including at least a circular tire frame formed of a thermoplastic resin material, in which the tire includes a reinforcing cord member that forms a reinforcing cord layer on the outer circumference of the tire frame, and the thermoplastic resin material includes at least a polyamide-based thermoplastic elastomer and an elastomer other than the polyamide-based thermoplastic elastomer (hereinafter, referred to as “other elastomer” in relation to the second embodiment of the present invention). The reinforcing cord layer may be wound in the circumferential direction of the outer circumference of the tire frame, or may be wound around the outer circumference in a crossing manner. The tire of the second aspect of the present invention includes a circular tire frame formed of a thermoplastic resin material including a polyamide-based thermoplastic elastomer and another elastomer. Here, the “polyamide-based thermoplastic elastomer” has the same definition as that used in the first aspect of the present invention as described above. The other elastomer means a thermoplastic resin material formed of a copolymer including a polymer constituting a hard segment that is crystalline and has a high melting point, or a hard segment that has high cohesive force, and a polymer constituting a soft segment that is non-crystalline and has a low glass transition temperature, in which the polymer constituting the hard segment is a polymer other than a polyamide having amide bonds (—CONH—) in the main chain, for example, a polyurethane-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer (including an olefin copolymer such as an olefin-methacrylic acid copolymer or an olefin-acrylate copolymer), a polystyrene-based thermoplastic elastomer, a polyester-based thermoplastic elastomer and the like obtainable by polymerizing urethane, styrene, an olefin, and a polyester, respectively. The thermoplastic resin for the second aspect of the present invention has the same definition as that used in the present invention according to the first aspect as described above. A thermoplastic resin material including a polyamide-based thermoplastic elastomer and another elastomer has heat resistance and also exhibits excellent tensile modulus of elasticity, tensile strength and fracture strain. Furthermore, when a thermoplastic resin material including a polyamide-based thermoplastic elastomer and another elastomer is used in the tire frame, the structure of the tire can be simplified as compared to the conventional rubber tires, and as a result, weight reduction of the tire can be realized. Therefore, when a tire frame is formed using the thermoplastic resin material, abrasion resistance and durability of the tire can be increased. On the other hand, in the case where a polyamide-based thermoplastic elastomer is used alone, when an attempt is made to adjust the elastic modulus, it is necessary to control the ratio of the hard segment and the soft segment. On the contrary, when a polyamide-based thermoplastic elastomer and another elastomer are used in combination, the elastic modulus of the thermoplastic resin material can be easily adjusted by adjusting the content ratio of the two components, as compared to the case of using a polyamide-based thermoplastic elastomer alone. Therefore, since the elastic modulus of the thermoplastic resin material can be easily set to a desired range, the resin material is excellent in view of the production cost, and impact resistance can be easily enhanced. In an embodiment of the tire of the second aspect of the present invention, a reinforcing cord member is wound around the outer circumference of a tire frame formed of a thermoplastic resin material including a polyamide-based thermoplastic elastomer and another elastomer, to form a reinforcing cord layer. When the reinforcing cord layer is formed on the outer circumference of the tire frame, the resistance to puncture and resistance to cutting of the tire, and the rigidity in the circumferential direction of the tire (tire frame) are increased. Also, as the rigidity in the circumferential direction is increased, creeping (a phenomenon in which plastic deformation of the tire frame increases with time under a constant stress) in the tire frame formed of a thermoplastic material is suppressed. Furthermore, a polyamide-based thermoplastic elastomer can easily penetrate not only between the fibers of the reinforcing cord member itself, but also between twisted cords in the case where the reinforcing cord member has a twisted-fiber structure, due to the low melt viscosity of the elastomer. Accordingly, the polyamide-based thermoplastic elastomer has high adhesiveness to reinforcing cord member, and has excellent fixing performance such as welding strength. Also, when the reinforcing cord member is an organic fiber, since the polyamide-based thermoplastic elastomer that forms the tire frame can be welded to the reinforcing cord member, high welding properties and excellent fixing performance are obtained. Further, since a polyamide-based thermoplastic elastomer exhibits excellent elongation, the fracture properties are excellent. Therefore, when a thermoplastic resin material including a polyamide-based thermoplastic elastomer and another elastomer is used, for example, the phenomenon in which air remains in the surroundings of the reinforcing cord members in the reinforcing cord winding step (incorporation of air) can be suppressed. If the thermoplastic resin material has high adhesiveness and welding properties to the reinforcing cord, and incorporation of air into the surroundings of the reinforcing cord members is suppressed, the movement of the reinforcing cord member due to, for example, a force applied during driving can be effectively suppressed. Thereby, for example, even in the case where a tire-constituting member is provided so as to cover the entirety of the reinforcing cord members in the outer circumference of the tire frame, since the movement of the reinforcing cord members is suppressed, detachment or the like between these members (including the tire frame) is prevented from occurring, and durability of the tire is enhanced. (2-2) The tire of the second aspect of the present invention can be configured such that the reinforcing cord layer contains a resin material. As such, when the reinforcing cord layer contains a resin material, the difference in hardness between the tire and the reinforcing cord layer can be decreased as compared with the case where the reinforcing cord members are fixed with a cushion rubber, and therefore, the reinforcing cord members can be adhered and fixed to the tire frame further. Thereby, the incorporation of air as described above can be effectively prevented, and the movement of the reinforcing cord member at the time of driving can be effectively suppressed. Furthermore, when the reinforcing cord member is a steel cord, if an attempt made to separate the reinforcing cord from the cushion rubber at the time of disposal of the tire, while it is difficult to separate a vulcanized rubber from the reinforcing cord only by heating, a resin material can be separated from the reinforcing cord member by heating only. Therefore, it is advantageous in view of recyclability of the tire. Furthermore, a resin material usually has a lower loss factor (tan δ) compared to vulcanized rubbers. Accordingly, if the reinforcing cord layer contains a large amount of a resin material, the rolling properties of the tire can be enhanced. Moreover, a resin having a relatively high elastic modulus compared to vulcanized rubbers is advantageous in that the resin has high in-plane shear rigidity, and also exhibits excellent steering stability at the time of tire driving, and excellent abrasion resistance. Here, if the expression “resin” is used alone, the “resin” has the same definition as that used in the first aspect of the present invention described above. When the reinforcing cord layer contains a resin material, from the viewpoint of increasing the pull-out properties (difficulty to be pulled out) of the reinforcing cords, the reinforcing cord members are preferably covered by a resin material over 20% or more of the surface, and more preferably 50% or more of the surface. Also, the content of the resin material in the reinforcing cord layer is preferably 20 mass % or more, and more preferably 50 mass % or more, relative to the total amount of the materials that constitute the reinforcing cord layer excluding the reinforcing cords, from the viewpoint of increasing the pull-out properties of the reinforcing cords. In order to configure the reinforcing cord layer to include a resin material, for example, the reinforcing cord layer can be formed in a configuration such that when viewed from a cross-section of the tire frame along the axial direction, at least a portion of the reinforcing cord member is embedded in the outer circumference of the tire frame that is formed of a thermoplastic resin material. In this case, the thermoplastic resin material including a polyamide-based thermoplastic elastomer and another elastomer in the outer circumference of the tire frame in which the reinforcing cord member is embedded, corresponds to the resin material as a component of the reinforcing cord layer, and the polyamide-based thermoplastic elastomer (thermoplastic resin material) forming the tire frame and the reinforcing cord member constitute the reinforcing cord layer. Furthermore, in order to configure the reinforcing cord layer to include a resin material, a coated cord member obtained by coating a reinforcing cord with a resin material of the same kind as or different from the resin material that forms the tire frame, may be wound in the circumferential direction of the tire frame. The “same kind” as used for resin material means a situation in which both are ester-based resin materials, or both are styrene-based resin materials, or the like. (2-3) The tire of the second aspect of the present invention can be configured such that the mass ratio (x:y) of the polyamide-based thermoplastic elastomer (x) and the other elastomer (y) in the thermoplastic resin is 95:5 to 60:40. As such, when the mass ratio (x:y) of the polyamide-based thermoplastic elastomer (x) and the other elastomer (y) is set to 95:5 to 60:40, a good balance can be easily achieved between the welding properties between the reinforcing cord members and the tire frame, and the impact resistance of the tire. (2-4) The tire of the second aspect of the present invention can be configured such that the other elastomer is any one selected from a polyurethane-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer, a polystyrene-based thermoplastic elastomer, of a polyester-based thermoplastic elastomer. When the other elastomer in the thermoplastic resin material is any one selected from a polyurethane-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer, a polystyrene-based thermoplastic elastomer, or a polyester-based thermoplastic elastomer, the performance of the polyamide-based thermoplastic elastomer can be sufficiently exhibited, and also, a balance between durability and impact resistance of the tire can be easily achieved. The tire of the second aspect of the present invention can be produced by a production method which includes a tire frame piece forming step of forming a tire frame piece for constituting a portion of a circular tire frame, using a thermoplastic resin material including at least a polyamide-based thermoplastic elastomer and the another elastomer; a tire frame piece bonding step of forming a tire frame by fusing two or more of the tire frame pieces, which make a pair, by applying heat to bonding surfaces of the tire frame piece; and a reinforcing cord member winding step of winding a reinforcing cord member around the outer circumference of the tire frame in the circumferential direction to form a reinforcing cord layer. In the production method described above, tire frame pieces of the circular tire frame can be formed by using a thermoplastic resin material including a polyamide-based thermoplastic elastomer and another r elastomer. Since the polyamide-based thermoplastic elastomer can have its melting point set to about 100° C. to 250° C., for example, it is not necessary to carry out a process of fusing the tire frame pieces at or above 300° C., and the process of fusing can be carried out at a relatively low temperature. As such, since the process of fusing can be carried out at a relatively low temperature, deterioration of the resin can be prevented, and from the viewpoint of energy availability or the like, the tire productivity can be increased. Furthermore, a tire frame piece in which a thermoplastic resin material including a polyamide-based thermoplastic elastomer and the another elastomer is used is such that when tire frame pieces are fused to form a tire frame, sufficient adhesive strength between the tire frame pieces is obtained, and the performance of the frame itself is not deteriorated by the temperature at the time of fusion. Therefore, durability at the time of driving, such as the resistance to puncture or abrasion resistance of the tire thus produced can be increased. The production method can be configured such that in the tire frame piece bonding step, the bonding surface of the tire frame piece is heated to a temperature equal to or higher than the melting point of the thermoplastic resin material that constitutes the tire frame piece (for example, melting point +10° C. to +150° C.). As such, when the bonding surface of the divided body is heated to a temperature higher than or equal to the melting point of the thermoplastic resin material that constitutes the tire frame piece, since fusion between the tire frame pieces can be sufficiently achieved, productivity of the tire can be increased, while durability of the tire is enhanced. The means for solving the problem of the third aspect is as follows. (3-1) The tire of the third aspect of the present invention is a tire including at least a circular tire frame formed of a thermoplastic resin material, in which the thermoplastic resin material includes a polyamide-based thermoplastic elastomer, and an acid-modified elastomer obtained by acid-modifying a thermoplastic elastomer other than the polyamide-based thermoplastic elastomer, or a mixture of a thermoplastic elastomer other than the polyamide-based thermoplastic elastomer and an acid-modified elastomer obtained by acid-modifying the elastomer other than the polyamide-based thermoplastic elastomer. That is, the tire of the third aspect of the present invention includes a circular tire frame formed of a specific thermoplastic resin material, and the specific thermoplastic resin material includes at least 1) a combination of a polyamide-based thermoplastic elastomer and an acid-modified elastomer obtained by acid-modifying a thermoplastic elastomer other than the polyamide-based thermoplastic elastomer, or 2) a combination of a polyamide-based thermoplastic elastomer, a thermoplastic elastomer other than a polyamide-based thermoplastic elastomer, and an acid-modified elastomer obtained by acid-modifying a thermoplastic elastomer other than a polyamide-based thermoplastic elastomer. Hereinafter, the “thermoplastic elastomer” refers to a thermoplastic resin material formed of a copolymer that includes a polymer constituting a hard segment that is crystalline and has a high melting point or a hard segment that has high cohesive force power, and a polymer constituting a soft segment that is non-crystalline and has a low glass transition temperature. The “polyamide-based thermoplastic elastomer” has the same definition as that used in the first aspect of the present invention as described above. In the third aspect of the present invention, the “thermoplastic elastomer other than a polyamide-based thermoplastic elastomer” means a thermoplastic elastomer which does not include an amide bond (—CONH—) in the main chain of the polymer constituting the hard segment, among thermoplastic elastomers. Hereinafter, a thermoplastic elastomer other than a polyamide-based thermoplastic elastomer will also be referred to as “other thermoplastic elastomer”. In the third aspect of the present invention, the “acid-modified elastomer obtained by acid-modifying a thermoplastic elastomer other than a polyamide-based thermoplastic elastomer” means a thermoplastic elastomer obtained by bonding a compound having an acidic group to a thermoplastic elastomer other than a polyamide-based thermoplastic elastomer (other thermoplastic elastomer). In addition, the “thermoplastic elastomer other than a polyamide-based thermoplastic elastomer” (other thermoplastic elastomer) does not encompass an acid-modified elastomer obtained by acid-modifying another thermoplastic elastomer. The thermoplastic resin in the third aspect of the present invention has the same definition as that used in the present invention according to the first aspect as described above. A polyamide-based thermoplastic elastomer is advantageous in that the thermoplastic elastomer has heat resistance, and also exhibits excellent tensile modulus of elasticity, tensile strength, and fracture strain. Furthermore, as the thermoplastic resin material includes an acid-modified elastomer, since the elasticity of the resin material does not become too strong, and the thermoplastic resin material is flexible, the tensile modulus of elasticity can be decreased, and impact resistance can be improved. Furthermore, even if the resin material is fractured, the resin material is not easily torn off and ruptured, and the resin material easily forms a stretched state. Accordingly, regarding the tire performance, even when the tire is damaged, puncture does not easily occur, and rupture of the tire can be avoided. (3-2) The tire of the third aspect of the present invention can be configured such that the acid value of the thermoplastic resin material is equal to or greater than 0.1 mg-CH3ONa/g but less than 2.2 mg-CH3ONa/g. As such, when the acid value of the thermoplastic resin material is adjusted to the range described above, particularly, the melt viscosity of the thermoplastic resin material does not increase excessively, and since excellent fluidity is obtained, injection molding properties are superior. Accordingly, the production efficiency of the tire increases. Therefore, a balance can be achieved between tensile elasticity and fracture properties as the tire performance, and manufacturability in view of the injection molding properties. The thermoplastic resin material has a sea-island structure having a sea phase, which is a matrix phase formed of a polyamide-based thermoplastic elastomer, and an island phase, which is a dispersed phase formed of an acid-modified elastomer, or an acid-modified elastomer and another thermoplastic elastomer (unmodified). In regard to the sea-island structure, as the acid value is higher, the island phase tends to be smaller, and as the acid value is lower, the island phase tends to be larger. When the acid value of the acid-modified elastomer is in the range described above, the island phase is finely dispersed in the thermoplastic resin, and impact resistance, tensile elasticity, and fracture properties are enhanced. (3-3) The tire of the third aspect of the present invention can be configured such that the ratio of the mass of the polyamide-based thermoplastic elastomer in the thermoplastic resin material, and the total mass of the acid-modified elastomer and the thermoplastic elastomer other than a polyamide-based thermoplastic elastomer (mass of the polyamide-based thermoplastic elastomer:total mass of the acid-modified elastomer and the thermoplastic elastomer other than a polyamide-based thermoplastic elastomer) is from 90:10 to 60:40. When the ratio of the mass of the polyamide-based thermoplastic elastomer in the thermoplastic resin material in the thermoplastic resin material and the total mass of the acid-modified elastomer and the thermoplastic elastomer other than a polyamide-based thermoplastic elastomer is adjusted to the range described above, the performance of the thermoplastic resin material can be sufficiently exhibited, and the tensile elasticity and fracture properties as the tire performance can be further enhanced. (3-4) The tire of the third aspect of the present invention can be configured such that the content of the polyamide-based thermoplastic elastomer in the thermoplastic resin material is 55 mass % to 95 mass %. When the content of the polyamide-based thermoplastic elastomer in the thermoplastic resin material is in the range described above, the performance of the thermoplastic resin material can be sufficiently exhibited, and the tensile elasticity and fracture properties as the tire performance can be further enhanced. Furthermore, the tire of the third aspect of the present invention may also include, in addition to the tire frame formed of a thermoplastic resin material, a reinforcing cord member that is wound around the outer circumference of the tire frame formed of a thermoplastic resin material to form a reinforcing cord layer. When the reinforcing cord member is wound in the circumferential direction around the outer circumference of the tire frame formed of a thermoplastic resin material to form a reinforcing cord layer, the resistance to puncture and resistance to cutting of the tire, and the rigidity in the circumferential direction of the tire (tire frame) are increased. Meanwhile, as the rigidity in the circumferential direction is increased, creeping (a phenomenon in which plastic deformation of the tire frame increases with time under a constant stress) in the tire frame formed of a thermoplastic material is suppressed. (3-5) The method for producing a tire of the third aspect of the present invention includes a tire frame piece forming step of forming a tire frame piece for constituting a portion of a circular tire frame, using a thermoplastic resin material including at least a polyamide-based thermoplastic elastomer, and an acid-modified elastomer obtained by acid-modifying a thermoplastic elastomer other than the polyamide-based thermoplastic elastomer, or a mixture of a thermoplastic elastomer other than the polyamide-based thermoplastic elastomer and an acid-modified elastomer obtained by acid-modifying the elastomer other than the polyamide-based thermoplastic elastomer; and a tire frame piece bonding step of forming a tire frame by fusing two or more of the tire frame pieces, which make a pair, by applying heat to the bonding surfaces of the tire frame pieces. The method for producing a tire of the third aspect of the present invention forms a tire frame piece of a circular tire frame, using a thermoplastic resin material. Since the thermoplastic resin material has excellent tensile elasticity and fracture properties, the riding quality of a car using a tire thus produced is excellent, and the resistance to bursting and resistance to puncture of the tire can be enhanced. (3-6) The method for producing a tire of the third aspect of the present invention can be configured such that the acid value of the thermoplastic resin material is equal to or greater than 0.1 mg-CH3ONa/g but less than 2.2 mg-CH3ONa/g. As such, when the acid value of the thermoplastic resin material is adjusted to the range described above, particularly, the melt viscosity of the thermoplastic resin material does not increase excessively, and since fluidity is excellent, injection molding properties are superior. Therefore, the production efficiency of the tire increases, and it is also preferable from an environmental viewpoint such as energy saving. (3-7) The method for producing a tire of the third aspect of the present invention can be configured so as to include a process of performing injection molding using the thermoplastic resin material in the tire frame piece forming step. Since a thermoplastic resin material having an acid value of the thermoplastic resin material of equal to or greater than 0.1 mg-CH3ONa/g but less than 2.2 mg-CH3ONa/g has excellent injection molding properties, productivity of the tire can be increased. The means for solving the problem of the fourth aspect is as follows. (4-1) The tire of the fourth aspect of the present invention is a tire including a circular tire frame formed of a thermoplastic resin material, in which the thermoplastic resin material includes a thermoplastic elastomer including a hard segment and a soft segment in the molecule thereof, and needle-shaped crystal grains having a fiber length of 1 μm to 500 μm and a fiber diameter of 0.01 μm to 10.0 μm (hereinafter, also appropriately referred to as “specific needle-shaped crystal grains”). (4-2) In regard to the tire of the fourth aspect of the present invention, it is preferable that the content of the specific needle-shaped crystal grains relative to the total mass of the thermoplastic resin material that forms the tire frame be in the range of 0.1 mass % to 10 mass %. (4-3) In regard to the tire of the fourth aspect of the present invention, it is preferable that the needle-shaped crystal grains contained in the thermoplastic resin material are inorganic particles selected from a metal oxide, a metal nitride, a metal carbonate, a metal silicate, a metal titanate, a metal sulfate, or a metal borate. (4-4) In regard to the tire of the fourth aspect of the present invention, it is preferable that the thermoplastic elastomer included in the thermoplastic resin material be a thermoplastic elastomer selected from a polyamide-based thermoplastic elastomer, a polyester-based thermoplastic elastomer, or a polystyrene-based thermoplastic elastomer. The means for solving the problem of the fifth aspect is as follows. (5-1) The tire of the fifth aspect of the present invention is a tire including at least a circular tire frame formed of a resin material, in which the resin material includes a thermoplastic elastomer including a hard segment and a soft segment in the molecule thereof, and a resin having a glass transition temperature that is higher than the glass transition temperature of the hard segment. The tire of the fifth aspect of the present invention includes a circular tire frame formed of a resin material including a thermoplastic elastomer including a hard segment and a soft segment in the molecule thereof, and a resin having a glass transition temperature (Tg) that is higher than the glass transition temperature of the hard segment (hereinafter, may be referred to as “specific resin according to the fifth aspect of the present invention”). In regard to the tire of the fifth aspect of the present invention, since the tire frame is formed of the resin material, a vulcanization process that is an essential process for the conventional tires made of rubber is not essential, and the tire frame can be molded by, for example, injection molding. Therefore, simplification of the production process, time shortening, cost reduction, and the like can be promoted. Furthermore, when a resin material is used in the tire frame, the structure of the tire can be simplified as compared with the conventional tires made of rubber, and as a result, weight reduction of the tire can be realized. Accordingly, abrasion resistance and durability of the tire in which a tire frame is formed of the tire material can be enhanced. The “thermoplastic elastomer” has the same definition as that used in the present invention according to the third aspect as described above. In order to increase the elastic modulus of the thermoplastic elastomer (for example, the tensile modulus of elasticity defined in JIS K7113:1995), increasing the content ratio of the hard segment in the elastomer may be considered. However, when the content ratio of the hard segment is increased in order to increase the elastic modulus of the thermoplastic elastomer, the loss factor (tan δ) of the thermoplastic elastomer also increases along therewith. Furthermore, in order to enhance the heat resistance (temperature dependency of deflection under load, the elastic modulus, and the like) of the tire frame, using a thermoplastic elastomer having a high glass transition temperature or a thermoplastic elastomer having a high elastic modulus can be considered. However, as explained above, these thermoplastic elastomers also undergo an increase in the tan δ value. In the tire of the fifth aspect of the present invention, the resin material that forms the tire frame includes the specific resin according to the fifth aspect of the present invention, which has a glass transition temperature (Tg) higher than that of the hard segment, in addition to the thermoplastic elastomer. Therefore, as compared with the case of using the thermoplastic elastomer as a single substance, an increase in the elastic modulus can be achieved while the tan δ value of the tire frame is maintained low. Thereby, a tire having a low rolling resistance and a high elastic modulus can be provided. Furthermore, since the elastic modulus can be increased while the tan δ value of the tire frame is maintained low, heat resistance of the tire frame can also be increased. (5-2) In regard to the tire of the fifth aspect of the present invention, a resin having a glass transition temperature that is higher by 20° C. or more than the glass transition temperature of the hard segment of the thermoplastic elastomer can be used as the resin. The tire of the fifth aspect of the present invention can sufficiently exhibit an effect of increasing the elastic modulus, by adjusting the difference between the glass transition temperature of the hard segment of the thermoplastic elastomer and the glass transition temperature of the resin, to 20° C. or more. The difference (Tg1-Tg2) between the glass transition temperature of the hard segment (Tg1)
{'bibliographic_information': "{'country': 'US', 'doc-number': '13818531', 'kind': 'B2', 'date': '20110825', 'extension': '234', 'invention_title': 'Tire, and tire manufacturing method'}", 'source_file': './grant/2016/ipg160816.xml', 'source_data': 'USPTO-Grant'}