| 摘要 |
<p>PURPOSE:To enable a device to absorb impact force, acting on a guide roller by a protruding part or the like of a guide rail, by elastically supporting right and left guide arms, rotatably supporting in their point end the guide roller rolling along a guide way, in the longitudinally swiveling direction of the guide arm. CONSTITUTION:Right and left base arms 6, 6 are connected to a running wheel 2 through a knuckle, having its base end part with a king pin 3 serving as the supporting axis, and a guide arm 7 horizontally turnably mounts its base end part about a vertical shaft 8 to the respective point end part of the base arm 6, 6, rotatably supporting a guide roller 9, rolling along a guide rail G1 in both sides of a guide way G, in the point end part of the guide arm 7. The guide arm 7 is horizontally turned between a protruding position and a storage position by turning a worm gear 12, meshed with a worm wheel 10 secured to the vertical shaft 8, by a motor or the like. The worm gear 12 is provided being able to only slide in a shaft 11 while elastically supported by supporting springs 19, 20 provided in both sides.</p> |
