| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem in a boom type vehicle for high lift work adopting a rotary actuator as a work bench revolving device that a hydraulic hose, etc., for connecting a control device mounted on the work bench and a hydraulic motor for driving various hydraulic operations may be caught in an obstacle or inappropriate tension force may be applied to it when the work bench is oscillated. SOLUTION: In order to solve the above problem, a through-hole is formed in a shaft mounted at the center of rotation of the rotary actuator so that the hydraulic hose is inserted into the hole.
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