| 摘要 |
In a rotatively operating tool, a lever ( 5 ) having a head ( 4 ) at its tip end is turnably connected to a handle ( 6 ) provided at its tip end with a lower jaw ( 12 ). The head ( 4 ) is provided with an upper jaw ( 7 ) brought into engagement with an engaging surface ( 2 a) of a bolt head ( 2 ). A spring ( 14 ) is mounted between the lever ( 5 ) and the handle ( 6 ) for biasing the lever ( 5 ) to turn it in a direction of abutment of a stopper face ( 11 ) of the lever ( 5 ) against the handle ( 6 ). When the handle ( 6 ) is turned in one direction, the lower jaw ( 12 ) at the tip end of the handle ( 6 ) is brought into abutment against an engaging surface ( 2 b) of the bolt head ( 2 ), whereby the bolt head ( 2 ) is clamped between the lower jaw ( 12 ) and the upper jaw ( 7 ). When the handle ( 6 ) is turned in an opposite direction, it is brought into a state in which the clamping of the bolt head ( 2 ) is canceled. Even when the lever ( 5 ) is turned against a biasing force of the spring ( 14 ), the bolt head ( 2 ) is clamped between the upper jaw ( 7 ) and the lower jaw ( 12 ). Thus, it is possible to provide a rotatively operating tool having a simple structure, which is designed so that a rotatively operated member such as a bolt can be rotated in one direction and even in an opposite direction as required by the reciprocally turning operation of the tool.
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