| 摘要 |
PURPOSE:To manually stop a dolly easily and surely by use of a link motion by providing grounding legs capable of freely lifting or lowering at four corners of a car body and by connecting the working shaft of a foot pedal to each of them through a link mechanism. CONSTITUTION:To stop a car body 1, first a foot pedal 18 is depressed and a lever piece 17 is rotated to an arrow direction through a working shaft 16. Then, each interlocking rod 20 pivoted 19 on the lever piece 17 is depressed, pushing the connecting pin 13 at the tip and expanding the aperture angle of a toggle joint 12, thereby the grounding leg 7 pivoted 14, 15 at the tip is lowered against a coil spring 10. When the lower end 8 of the grounding leg 7 is grounded and the aperture angle of the joint 12 exceeds 180 deg., the lever piece 17 hits the stopper 21 of the car body 1, and the descent of said pedal 18 is restricted. On the other hand, when a pedal 18 is kicked up, each connecting pin 13 is pulled and the joint 12 is returned to the original position, and the grounding leg 7 is lifted by the coil spring 10. |
