| 摘要 |
PURPOSE:To make an elastic arm small-sized and light by holding a square pipe holder and an inserting square slide pipe so as to be slidable to each other by a guide block between the inside surface of the square pipe holder and the outside surface of the inserting square slide pipe, and shifting the inserting square slide pipe by a rotation of a screw. CONSTITUTION:The outside surface of an inserting square slide pipe 21 is fitted to the surface of guide blocks 22a-d attached to the inside surface of a square pipe holder 20 and it is slidable. The inserting square slide pipe 21 moves forward and backward by a rotation of a screw 26. By this structure, an elastic arm becomes small-sized and light. As for the guide unguents 22a-d, it is also allowed that one group is attached to the square pipe holder 20 and the other group is attached to the inserting slide pipe 21. |
