| 摘要 |
PURPOSE:To couple diengageably a machine body and table with each other through the vertical movement of a block for improving working accuracy by forming dog teeth respectively on the machine body and turnable and forming connecting dog teeth on a vertically movable block in the machine body. CONSTITUTION:A turnable 2 is rotatably supported by a body frame 1 to the upper end of which is secured fixedly a large ring-like block 6 coaxially with the table 2. Said block is formed on the lower surface with the fixed side dot teeth 6a. A small ring-like block 7 is secured fixedly to a table 1 to fit in the inner periphery of the block 6 and formed on the lower surface with the pivotal side dog teeth 7a. A slide block 8 vertically movable is provided below the dog teeth 6a, 7a and formed on the upper periphery with connecting dog teeth 9a. When the dog teeth 9a is disengaged from the dog teeth 6a, 7a, the table 2 is freely pivoted to the frame 1. After the completion of indexing, the frame 1 is fixedly coupled with the table 2 by the ascent of dog teeth 9a to prevent the discrepancy between both members due to working load. |
