| 摘要 |
PURPOSE:To make it possible to change guide rails by constituting at least one of two guide sections that are disposed in parallel at both sides of a base as a guide rail and making this guide rail attachable and detachable to a rail supporting section. CONSTITUTION:Guide rails 31 and 32 that constitute guide sections in the Y-axis direction are mounted on both sides, right and left sides, of a base 21. Those guide rails 31 and 32 are formed longer than the longitudinal length of the base 21, and at the same time they are mounted parallel to the upper face and project from both sides of the base 21. On the guide rails 31 and 32 angular supporting columns 41 and 42 are supported freely movably. In this case one of the columns is constituted as a guide rail and detachable at the supporting section, so that the guide rail can be changed. |
