| 摘要 |
PURPOSE:To protect a stopper from external force and to improve the maneuverability by covering a stopper at the rear end section of a hatch cover with the front end section of seat while extending the side section of seat to cover the opposite side sections at the rear section of the hatch cover. CONSTITUTION:When closing a hatch cover 28 and then lowering a seat 50 from above to be fixed by means of the stoppers 60, 90, the stoppers 52, 53 are positioned in a recess 57 formed by the front wall 56 while the extended section 55 will abut against the opposite sides at the rear section of the hatch cover 28. Consequently, when a operator seats in the seat 50 and bringing his weight forward during operation, the inside of the knee will abut against the extended section, thereby protecting the knee. Since the stopper of the openable/ closable hatch cover 28 is protected by the front end section of the seat 50 and the knee of the operator is protected by the extended sections 55 at the opposite sides of the front end of the seat 50, the maneuverability through movement of the body weight can be improved.
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