| 摘要 |
<p>PURPOSE:To improve a work efficiency and versatility of device with tip and intermediate booms telescopically composed in turn or concurrently by suitably selecting the action sequence of tip and intermediate boom telescopic cylinders. CONSTITUTION:A tip boom 13 is expanded and contracted to an intermediate boom 12 with a tip boom telescopic cylinder 24, and the boom 12 is expanded and contracted to a basic boom 11 with an intermediate boom telescopic cylinder 21. Consequently the sequential or concurrent telescopic motion of the booms 13 and 12 can be randomly selected by suitably selecting the telescopic timing of both cylinders 24 and 21, and the versatility of a device is improved. In any use form, because of the movement of a slider 40 in the boom longitudinal direction in interlocking with the telescopic motion of the boom, the hydraulic hose etc., 51 and 52 of a base machine side and a hydraulic equipment etc. side respectively follow the boom's telescopic movement with a proper tension constantly retained, and damage by abnormal tension or a dip can be iliminated.</p> |
