| 摘要 |
PURPOSE:To reduce the number of components, by using a setting pin provided to a steel crossarm for a pressing pin of a changing plate for band changeover. CONSTITUTION:A setting plate 13 is fitted to a setting pin 12 provided to a steel crossarm 11 freely turnably. A change plate for band changeover is fitted to the tip of the arm 11 movably left and right and the plate 20 is formed with notch 21 opposed to the pin 12. When a push button 10 loaded with the arm 11 is operated, the tip of the pin 12 put in the notch 21 to laterally shift the change plate 20 in contact with a taper 22 provided to the notch 21 for band changeover. Since the pin 12 is used for the band changeover, an exclusive use of pin for change plate depression is unnecessary, allowing to reduce the number of components. |
