| 摘要 |
<p>PURPOSE:To extend a cable without producing twists, to increase the coupling strength among rollers, the reliability, and the operability of opening and closing. CONSTITUTION:When a roller 3 rotates in the closing direction, a shaft 4 touches a positioning block 15, and a positioning and reinforcing pin 13 is inserted in its radial direction. When an opening and closing pin 17 is inserted into the shaft 4 in its axial direction by the operation of an opening and closing lever 18, balls enter into a pin fixing groove in the peripheral surface of the opening and closing pin 17, and the pin is fixed. Incidentally, at the time of extending a cable 20 of small diameter, chin parts 6 touching the cable 20 rotate independently against roller bodies 5.</p> |
