PURPOSE: To provide a stopper mechanism which stops a sliding top plate and a drawer of a table at a desired position.
CONSTITUTION: A movable body 22 is movably arranged along a pair of guide rails. Nuts are buried in the both sides of one end and screw parts are opened in the bottom face. Guide rails 14 having guide grooves 20 whose both sides are formed into diameter-expansion parts 20a, 20b are formed. Collars 26 which are engaging inserted into the guide grooves 20, have the diameter smaller than that of the diameter expansion parts 20a, 20b, and are elastically deformed are formed. Screws or bolts which penetrate through the collars 26 so as to be threadly engaged with the screw parts and can support the collars 26 are attached. The collars 26 are so formed as to simultaneously move with the movable body 22 along the guide grooves 20. The collars 26 are elastically deformed by the guide grooves 20 and their outer faces are energized to the inner faces of the guide grooves 20. The collars 26 are so formed as to be returned to its original shape by the diameter expansion parts 20a, 20b and engagingly provided with aperture tip parts in the guide grooves 20 side of the diameter expansion parts 20a, 20b.