摘要 |
To provide an excellent chuck assembly that is superior in assembling workability, may be produced in low cost and is superior in mass-production property, in which a rotary sleeve ( 2 ) provided on a body ( 1 ) is rotated, jaws ( 4 ) engaged with rotary nuts ( 3 ) are moved back and forth to be opened and closed by the rotation of the rotary nut ( 3 ) rotated together with the rotary sleeve ( 2 ) and a tool is clamped by the jaws ( 4 ), a ring member ( 8 ) is provided in the rotary nuts ( 3 ), a convex and concave engaging means is provided between the ring member ( 8 ) and the rotary sleeve ( 2 ), and the ring member ( 8 and the rotary sleeve 2 are retained and prevented from falling apart from each other by the convex and concave engaging means.
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