| 摘要 |
<p>PURPOSE:To securely prevent displacement of a holder having a pin in the center thereof by interposing the holder between a table and a bed, and connecting one end of each of two belts wound by half a round around the pin to the end of the table while connecting the other end thereof to the end of the bed. CONSTITUTION:A holder 2 is mounted on an elongated bed member 1 so that a table member 3 and the bed member 1 are combined with each other. The holder 2 is guided by the table member and the bed member through balls on both ends thereof. A pin 6 is disposed in the center of the holder. An inner belt 7 and an outer belt 8 are wound by half a round around the pin 6 in directions reverse to each other, and further, one end of each belt is connected to a belt connecting portion 33 on the table side; the other end of each belt, to another belt connecting portion 13 on the bed side. The belts are slidden on the circumference of the pin in accordance with the relative movement of the table member and the bed member, thereby reducing movement of the holder to a half amount. Therefore, any displacement of the holder can be securely prevented with a simple constitution.</p> |
