| 摘要 |
PURPOSE:To simplify construction and carry out stabilized detection, by detecting rolling of a coupling bracket rotatable on a power take-off shaft as the center at the back of a car body relative to the machine body. CONSTITUTION:A coupling bracket 3 rotatable on a power take-off shaft 3 as the center at the back of a car body 4 is provided and a working device coupled through a hitch 2 is capable of freely rolling. When the working device performs rolling relatively to the car body 4, displacement of the bracket 3 is transmitted through a lever 12 to a detector 6. Detected values thereof are used for various controls. As a result, rolling and detection thereof can be carried out near the car body and stabilized control can be performed with facilitated handling in demounting of the working device.
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