| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent an erroneous operation of an operation lever and give a warning to a driver when a drum safety device is not operative.SOLUTION: A drum safety device 11 of a concrete mixer car 1 equipped with an operation lever 7 for operating a rotation direction and a speed of a drum 4 mounted on the concrete mixer car 1 includes a hook support plate 13 disposed at a position adjacent to a guide hole 10 of a lever support part 9, and a hook 12 having a hook part 14 rotatably attached to the hook support plate 13, and is configured so as to removably latch the hook part 14 of the hook 12 to a lever body 8.</p> |
