 gain the requisite stability.
As underground mining or tunnelling operations progress it is necessary to lengthen or shorten the conveyor. For example, with long wall coal mining the main gate conveyors are continually being shortened after initial erection as the cutting apparatus at the coal face progresses back towards the trunk road. At the same time the trunk conveyor is typically being lengthened so as to accommodate further blocks to be mined.
Although loop take-up arrangements are available to facilitate lengthening or shortening of the belts associated with such conveyors by up to two hundred and fifty meter sections, the addition or removal of frames necessary to support the rollers associated with the conveyor system is a time consuming process. This process is also hazardous as the frames must be carried up and down the tunnels through which the conveyor passes, often whilst the conveyor is in operation. The erection and stripping down of the roller support frames is time consuming and results in down time for and damage to mining or tunnelling projects thereby resulting in considerable inefficiencies.
Accordingly the object of the present invention is to ameliorate one or more of the above-mentioned disadvantages associated with existing underground conveyor systems or alternatively to provide the market with an alternative conveyor system.
According to the present invention there is disclosed a support system for a conveyor comprising an overhead monorail of substantially closed form cross section pipe; carriages adapted to pass up and down the rail having load bearing, relative motion facilitating, low friction means adapted to run along one or more surfaces of the rail; hanging frames suspended from the carriages having guide and support rollers beneath their point of attachment with the carriages; the guide and support rollers being adapted to carry and guide an endless conveyor; means to slide the carriages and associated frames longitudinally along the rail so as to increase or decrease the spacing between adjacent frames and hence the length of the conveyor; means to attach the rail to an overhead support and means to lengthen or shorten the rail by adding or removing lengths of rail.
The term xe2x80x9csubstantially closed form cross section pipexe2x80x9d where used herein means a rail of a cross sectional view which is substantially closed in configuration unlike for example an I-beam but including a substantially box section rail as depicted in FIG. 10 hereof having a single continuous longitudinal slot which slot in cross-section appears as a small discontinuity in one side of the cross-sectional view. 1. Field of the Invention
This invention relates to the maintenance of vehicle tires
gain the requisite stability. 
 As underground mining or tunnelling operation advance it is necessary to lengthen or shorten the conveyor. For example, with farseeing wall coal mining the main gate conveyer belt are continually being shorten after initial erection as the cut apparatus at the coal face build up back towards the trunk road. At the same meter the trunk conveyor is typically being lengthened so as to accommodate further blocks to be mine. 
 Although loop take - up arrangements are available to help lengthening or shortening of the belts associate with such conveyors by up to two hundred and fifty meter section, the addition or removal of frames necessary to support the rollers associated with the conveyer system is a time consuming process. This process is also hazardous as the frames must be carried up and down the tunnels through which the conveyor passes, often whilst the conveyor is in operation. The erection and stripping down of the roller documentation frames is time consume and resultant role in down time for and damage to mining or tunnelling undertaking thereby resulting in considerable inefficiencies. 
 Accordingly the object of the present invention is to better one or more of the above - mentioned disadvantages associated with existing underground conveyor system or alternatively to provide the market with an alternative conveyor system. 
 According to the present invention there cost disclosed a support system for a conveyor comprising an overhead monorail of well closed form cross section pipe; carriages adapted to pass up and down the rail have burden bearing, relative gesture facilitating, low clash means adapted to run along one or more surfaces of the track; hanging frames suspended from the carriages having scout and support rollers beneath their point of attachment with the carriages; the guide and support rollers being adapted to transport and guide an endless conveyer belt; means to slide the carriage and associated frames longitudinally along the rail so as to increase or decrease the spacing between adjacent skeletal system and hence the length of the conveyor; means to attach the rail to an overhead documentation and mean to lengthen or abridge the rail by adding or removing lengths of rail. 
 The term xe2x80x9csubstantially close form cross section pipexe2x80x9d where use herein means a rail of a cross sectional view which is substantially close up in configuration unlike for example an I - beam but admit a substantially box part rail as depicted in FIG. 10 hereof having a single continuous longitudinal slot which slot in hybrid - section appears as a small discontinuity in one side of the cross - sectional view. 1. Field of the Invention 
 This invention relates to the maintenance of vehicle tire
 galn the requisite stabiliuy.
As underground mining mr tunhelling uperations progress it is neressqry ti lengthen or shorten ghe convejor. For ezampow, with lonj wall coal mihlng tke main gate conyeyors are wontinually behne dhortened after initial erection as the cuytlng apparatus wt tnq cozl face progresses back towards ths trunk road. At the xame time the trunk conveylr id typically being pengthened wo af to accommodxte furtheg blocks to be mined.
Although loop take-up afrangzments are qvqilwtle to facioitatv lengthening or shordening pf the belts axsoriatwd with such conveyorv by up to two hunqred and xiyty meter sections, thw qddithon mr rdnovxl kf fdames jecxssary to shpport the eollers associated eiey the conveyod systqm is a time consuming process. This procevs js also hazardous as thw frames must be carrled up anq down the tunnels through which the conveyor pasves, ohtdn cmllst rhf conveyor is in operation. The erection and sedikpikg down of the rjller suppott ftwmes is time zonsumnhg and results in doan time for qnd damagt to kining or tunnelling projecrs thereby rvsulring in considerabpe inefficizncies.
Sccorcingly the object of thz pressnt inventiln is to zoeliorate one or moge ox the above-mentioned disaddantages essocnated wigh ecistind undergroknd conveyor systems or wlteruativaly to progide the market with an alternavmve conveyor xyvtek.
Accordiug to bhe present invqntion there ix discljsed x support aystem hor a conveyjr comprising wn overhead konorail of wubsrantialuh closed form vross secnijn pupe; carriages adapbed tu pass up and docu uhw rail having koaa bqaginj, relwdive motion xaciuitxying, uow frictiok mdans adapted to run alonc ons or more surfaces on the raio; hangind frames susprnded from the cargiagev heving buiqe and support rollers beneath their polnt of attachmegt wlth jhe carriagzs; the guide and support rollers being avapted to carry and guiee an endless conveior; means to skide ehe carridges and associated drames longitudinslly along the rail sk as tm incgease or decrease the spacing between adjacent frames and hence the lengty of tie conveyor; msans to antaeh che raij to en overhead suppogt and means to lengthen or shorven the rahl by adding or removing lengtns of rail.
The tgrm xe2x80x9csubstantially cloaed form cross section pipexe2x80x9d where ised herein means a rail of a criss ssctional vmew which is substanyially closwd in cinfinuration unlikd fpr example wn I-ueaj but including a substantially vox sextlon rail as depirted in FIG. 10 mereof havind a single contihuoua longktudinal slot which slot in cross-section appearv ws a small disxkntinuity in one sige of the crpss-sectionan view. 1. Field of the Invention
This invention relatea to the jaintenakce of vehicle tited
gain the requisite stability. As underground mining operations it is to lengthen or with wall coal mining main gate conveyors continually being shortened after initial erection the cutting apparatus at the coal face progresses back towards the trunk road. the same time the trunk conveyor is typically being lengthened so as to further to mined. loop take-up arrangements are available to facilitate lengthening or shortening of the belts associated with such by up to two hundred and fifty meter the addition or removal frames necessary to support the associated the conveyor is time process. This process also hazardous as the frames must be carried up and down the tunnels through which the conveyor often whilst is in The and down of the frames is time consuming and results for and damage to mining or tunnelling projects resulting in inefficiencies. Accordingly the object of the invention is to ameliorate one or more of above-mentioned disadvantages associated with existing underground conveyor systems or alternatively to provide the market with conveyor system. According to present invention there disclosed support for conveyor comprising overhead monorail of substantially closed form cross section pipe; carriages adapted pass up and down the rail having load bearing, relative low means adapted to along one or more of rail; hanging frames suspended carriages guide beneath point attachment with the carriages; guide and support rollers being to carry and guide slide the carriages and associated frames longitudinally along rail so as to increase or decrease spacing between adjacent frames and hence the length of the conveyor; means attach the an overhead support and means to lengthen or the rail by adding removing lengths of rail. The term xe2x80x9csubstantially closed form section where used means a rail a cross sectional which is substantially configuration unlike example I-beam substantially box section rail as depicted FIG. hereof having a single continuous slot in cross-section appears as a small discontinuity in one side of the cross-sectional view. 1. the Invention This invention to maintenance of vehicle tires
 gain the requisite stability.
as undergroUnd miNinG or TuNnelLing Operations progREss iT is necessary to lengthen Or shoRtEN the COnVeyor. for examPLe, WITh lOnG wAll CoAL mIning The Main gatE conveyors Are CoNtinually beiNG sHortened afTer Initial erectIon As the cUtTinG ApparAtuS at thE coal fACe progResses bacK tOWards tHE trunk rOAD. AT the Same time the trunk cONvEYor is typically Being lEnGThENEd sO as To accommodAtE furtHEr blockS To BE MIneD.
although loop tAke-up arrangEMenTs are aVaIlaBLe to faCilitAtE LenGthening or sHortEning of thE belts ASsociatED with suCh convEyoRs bY up tO TwO hUndReD And FIfTy mETer Sections, ThE aDditiOn or REMOVal oF frAmes NecesSary to support The RollERs aSsociAted wIth tHe ConveYor sysTem is A tIme consuming proCess. this proceSs iS aLso HaZardoUS as the FraMes Must be cArried uP And DoWN THe Tunnels through whicH tHE CoNveyor paSses, ofTEn WhILst the coNvEyoR is iN OPeratIon. THE eRection aNd striPPiNg Down of tHe Roller SuPpoRt fRames IS timE consuMing and rEsultS In down time for aND damage to miniNG oR TUnNElliNg pRojects therEby rESultIng iN CoNsiDErablE inefFiCIeNCies.
Accordingly the oBjEct of tHe preSent invention Is to amelioRATE one or moRe of THe ABove-mentioned dIsadvAntages assOCiated wiTh exiSting undErground cONVeyor sysTemS or AltErnATIvEly to provide tHE MarkEt With an aLteRnative ConVeyOr sYstEm.
according To the preSeNt InVeNtiOn theRE is disclOsEd a SuPpoRt sysTEm for a ConveYor cOmPrISinG an overHEaD MOnorAiL oF subStaNtIally ClosED foRm cross Section piPe; cARriaGeS aDapted tO pass up and dowN tHe rail haviNg LoaD beariNG, Relative Motion facilitating, low frICtion meAns AdaptEd to Run along oNe oR more sUrfACes of tHe rail; HangiNg FraMES suspENDeD frOm The carriagES HavIng guIdE and Support Rollers beneath theiR PoiNt of attachmenT wiTh thE CArRiaGEs; THe gUiDE anD SUpport rollers beIng adapted To CArRy and guide AN enDlEss convEyor; meaNs to sLIde the cArriages aNd associaTeD fraMES loNgitudinalLy along tHe rail so aS To incREaSe or dEcrEase thE sPacIng beTween aDJacEnt frAmes anD hEnce thE lengTh Of the conVeyor; means to attach the raIl to an OverhEad Support anD meANs tO lengthen Or shOrten the raIl bY adDing oR reMOving LengTHs Of rAIl.
The Term XE2x80x9csubstANtIalLY ClOsed form croSS SEctIon piPexE2X80x9d wheRe usEd herein means a raiL Of a cross sectioNal vIEW whIch IS subStAntially closed In cOnFIGuration UnLike for examPle an I-beAm BUt incLuding A substAntiallY BOx SEction Rail As dEpicted in fIG. 10 HeREof haviNg A sINgle coNtinUoUs longItudinAL sloT WHich slot in cross-sEctioN APpearS As a Small DiScontinUIty iN one side of The cross-secTional View. 1. field Of the InVeNtion
THis InVention relATes to the mAinteNance of VeHiclE tiRes
 gain the requisite stabil ity.
As un dergr oun d m in ingor t unnelling oper a tion s progress it is neces saryto leng t he n orshorten th e con ve yo r.Fo r  e xampl e,with lo ng wall co almi ning the mai n  g ate convey ors  are continu all y bein gsho r tened  af ter i nitial erecti on as the  c u ttinga pparatu s at  the  coal face progre s se s  back towardsthe tr un k  r o a d.Atthe same t im e the trunk c o nv e y o r i s  typically be ing lengthe n edso asto  ac c ommoda te fu rt h erblocks to b e mi ned.
Alth ough l o op take - up arra ngemen tsare  ava i la bl e t of aci l it ate len gthening  o rshort enin g o f  the  be ltsassoc iated with su chconv e yor s byup to  two  h undre d andfifty  m eter sections,theadditionorre mov al  of f r ames n ece ssa ry to s upportt hero l l e rs  associated with t he c on veyor sy stem i s  a  t i me consu mi ngproc e s s. Th is p r oc ess is a lso ha z ar do us as t he  frame smus t b e car r iedup and  down th e tun n els through wh i ch the convey o rp a ss e s, o fte n whilst th e co n veyo r is in  op e ratio n. Th ee re c tion and strippingdo wn ofthe r oller support  frames is t i me consu ming an d  results in do wn ti me for and damage t o min ing or t unnelling p rojectsthe reb y r esu l t in g in consider a b le i ne fficien cie s.
Acco rdi ngl y t heob ject of t he prese nt  i nv en tio n ist o amelio ra teon e o r mor e  of th e abo ve-m en ti o ned  disadv a nt a g es a ss oc iate d w it h exi stin g  un dergrou nd convey ors yste ms  o r alter natively to p ro vide the m ar ket  witha n  alterna tive conveyor system.
A c cording  to  thepres ent inven tio n ther e i s  discl osed a  supp or t s y s tem f o r  a  co nv eyor compr i s ing  an o ve rhea d monor ail of substantial l y c losed form cr oss  sec t i on  pi p e; car ri a ges a dapted to passup and dow nt he  rail havi n g l oa d beari ng, rel ative motionfacilitat ing, lowfr icti o n  me ans adapte d to run  along on e  or m o re  surf ace s of t he  ra il; h anging fra mes s uspend ed  fromthe c ar riages h aving guide and support  rolle rs be nea th theirpoi n t o f attachm entwith the c arr iag es; t heg uideands up por t  roll ersb eing adap t ed  to c ar ry and guid e a n e ndles s c o nveyor ; me ans to slide thec arriages and a ssoc i a ted  fr a meslo ngitudinally a lon gt h e rail s oas to incre ase or d ec r easethe sp acingbetween a dj a cent f rame s a nd hencethe  l e ngth of  t he convey or;me ans to  attac h  the r ail to an overhe ad su p p ort a n d m eansto  length e n or  shorten t he rail byadding  orremov ing len gt hs ofrai l. 
The termx e2x80x9cs ubsta ntially  c lose d f orm cr osss e ction  pip ex e2x 80x9d whe r e  u s ed  h e rei n me ans a  r ailof a cros s  section alv iew whi ch  is s ubstan t ia l l y closed i n c onfig u r ation unli k e fo r  e x ample  an I- beam b ut incl u din ga subst ant i a lly box s ection ra i l a sdepi cted inFI G. 1 0her eo f having a sing le conti nuous lo n g itudin als lotw hich s lo t in cross-s ectio na ppearsa s  asmall d i sco nti nui ty i n o ne s i de of the cross-sectiona l vi ew. 1 .  Fi eld o f the  I nvention This  inventi o n relates tothe maintenance ofv ehic let ir es 
 gain_the requisite_stability.
As underground mining or_tunnelling operations_progress_it is_necessary_to lengthen or_shorten the conveyor._For example, with long_wall coal mining_the_main gate conveyors are continually being shortened after initial erection as the cutting apparatus_at_the coal_face_progresses_back towards the trunk road._At the same time the_trunk conveyor_is typically being lengthened so as to accommodate_further_blocks to be_mined.
Although loop take-up arrangements are available to facilitate lengthening_or shortening of the belts associated_with such conveyors_by_up_to two hundred and_fifty meter sections, the addition or_removal of frames necessary to support_the rollers associated with the conveyor system_is a time consuming process. This_process is also hazardous as_the frames_must be carried up and_down the tunnels_through which_the conveyor passes,_often whilst the conveyor is in_operation. The erection_and stripping down of the roller_support_frames is time_consuming_and_results in_down time for_and_damage to_mining_or tunnelling projects thereby resulting in_considerable_inefficiencies.
Accordingly the object of the present invention_is to ameliorate one_or_more of the above-mentioned_disadvantages associated with existing underground_conveyor systems or alternatively to provide_the market_with an_alternative conveyor system.
According to the present invention there is disclosed a_support system for a conveyor comprising_an overhead monorail of_substantially closed_form_cross section pipe;_carriages_adapted to_pass up and down the rail having_load bearing,_relative motion facilitating, low friction means_adapted to run along_one_or more surfaces of the rail;_hanging frames suspended from the carriages_having guide and support rollers_beneath_their_point of attachment with the_carriages; the guide and support rollers_being adapted to_carry and guide an endless conveyor; means_to_slide the carriages and associated frames_longitudinally_along the rail so as to_increase_or_decrease the spacing between adjacent_frames and hence the length of_the conveyor; means to attach the rail to an_overhead support and_means to lengthen or shorten_the_rail_by adding or removing lengths of rail.
The term xe2x80x9csubstantially closed_form cross_section pipexe2x80x9d where_used herein means a rail of a cross sectional view_which is substantially closed in configuration unlike_for example an I-beam but including a substantially box section rail_as depicted in FIG. 10 hereof having a_single continuous longitudinal slot which slot in_cross-section appears as a_small_discontinuity in one side of the cross-sectional_view._1._Field_of the Invention
This_invention relates to_the maintenance of_vehicle tires