Disassemble ikea sofa - screws issue
A pair of nuts matching the existing thread can be threaded on the free end of the bolt. Use a pair of wrenches to tighten the nuts securely against each other. After loosening the nut against the frame, you can hammer against the paired nuts with a smaller risk to the bolt. If the bolt has to be turned, the paired nuts will provide a surface on which the wrench can act.