| 摘要 |
To provide a chuck device which is much superior in workability which may readily rotate a rotary sleeve in a loosening direction, a rotary sleeve ( 2 ) provided in a body 1 is rotated, jaws ( 4 ) threadedly engaged with a rotary nut ( 3 ) are opened and closed and moved forward and backward by a rotation of the rotary nut ( 3 ) rotating together with the rotary sleeve ( 2 ), a tool ( 5 ) is clamped or released by the jaws ( 4 ), and a rotation grip portion ( 7 ) is provided on an outer circumferential surface of the rotary sleeve ( 2 ) for gripping and rotating the rotary sleeve ( 2 ) by a rotary tool ( 6 ) such as a wrench.
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