| 摘要 |
PURPOSE:To make it unnecessary to adjust a parallel degree of an original base plate moving rail, by placing a force application axis of spring force for hooking a moving member and a driving member so that it becomes parallel to supporting surface for supporting the moving member. CONSTITUTION:A moving type original base plate 1A is guided to an original base plate moving rail 20 on a horizontal supporting plate 13, and is fitted into a driving member 17A by a ball plunger 21 being a fitting member, and a ball plunger receiving part 22a. Also, an application axis of spring force of the fitting member is constituted in the almost horizontal direction against the supporting plate 13. In this way, since the supporting plate 13 is not bent and also no immoderate force is put on the rail 20 requiring no adjustment of a parallel degree of the rail 20, and stale traveling is performed. |
