| 摘要 |
PURPOSE:To obtain the simple constitution and stabilize the installation operation by installing a number of L-shaped slide stop cross bands having a slide stop band part on one side and a screw shaft rod part on the other side in the radial direction in free appearance and permitting said cross bands to be remote-operated from a driver's seat. CONSTITUTION:A press contactor 40 is projected to the outer surface side of a wheel 2 by an operating member 9 at a driver's seat, and frictional rings 41 and 42 are selectively pressed to mesh the gear parts 43 and 44 with a main driving wheel 17. This revolution is transmitted to a cross band driving mechanism 13 through transmission rings 46-48, and a transmission ring 19 for turn and a transmission ring 18 for extension and contraction are driven. Therefore, a screw rings 25 for projecting and contracting a cross band and a rotary ring 26 for turning the cross band are operated, and a cross band 5 is projected and contracted by the meshing with the screw 27 on the shaft rod part 7 of the cross band 5. With such constitution, the mounting and demounting operation can be stabilized.
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