| 摘要 |
PROBLEM TO BE SOLVED: To provide a warp preventive appliance capable of solving the problem that the position of a door board toward a frame structure can not be adjusted in the horizontal direction by pivot hinges in the conventional warp preventive appliance. SOLUTION: When the position of the door board 20 is adjusted by the pivot hinges 11 and 22, a control pin 31c can be moved forward, backward and sideways within a range surrounded by the circumferential wall surface of a through hole 32a1. Even if the door board 20 is warped, the backward movement of the control pin 31c more than a predetermined quantity is controlled by a linear shape section A of the through hole 32a1. For that purpose, the warp more than an allowable range of the door board 20 is prevented, and the door board 20 can be prevented from being unopened.
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