| 摘要 |
PROBLEM TO BE SOLVED: To unnecessitate the thorough detachment of a detection means, when a working device is released from a travel vehicle body. SOLUTION: A swinging support shaft whose axis is longitudinally directed is disposed on a lifting mechanism D, and a hitch member 85 is attached to the swinging support shaft in a state capable of being freely rotated on the axis of the swinging support shaft. The posture of the hitch member 85 is held by a posture-holding means through a detection means for detecting the posture of the travel vehicle body B. The detection means is disposed at a position above the swinging support shaft and in front of the hitch member 85.
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