| 摘要 |
PROBLEM TO BE SOLVED: To provide a flip-up gate door which prevents a door from being pushed out when opened/closed, which can be operated with a weak force by virtue of good operability, and which enables the adjustment of an operating physical force. SOLUTION: This flip-up gate door is equipped with a support, a shaft which is turnably mounted on the shaft, a first turnable arm which is extended out forward by having its base end fixedly attached to the shaft, a first link whose intermediate part is pivotally mounted on the side of the base end of the first arm, a second link, one end of which is pivotally supported on the support and the other end of which is pivotally mounted on one end of the first link, a second arm whose base end is pivotally mounted on the other end of the first link and which is extended out almost in parallel with the first arm, and the door which is pivotally mounted at the tips of the first and second arms in a movable manner. The shaft is provided with an urging means which rotatively urges the shaft in an opening direction when the door is opened and which urges the shaft in the direction of supporting self weight torque of the gate door, when the door is closed. COPYRIGHT: (C)2004,JPO&NCIPI
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