| 1. A chuck device in which a rotary sleeve is rotated so that a plurality of jaws inserted into a hole provided in a tip end
of a body is slidingly opened and closed to thereby clamp a tool by the jaws, characterized in that ratchet teeth forming
an annular shape are provided in the body, an annular rotary member threadedly engaged with the jaws and rotated together
with the rotary sleeve is fitted around the body inside of the rotary sleeve, a retainer spring member detachably engaging
with the ratchet teeth is disposed outside of the ratchet teeth, the retainer spring member is provided so as to rotate a
circumference of the ratchet teeth in accordance with the rotation of the rotary member, the retainer spring member is mounted
on the rotary member by a concave and convex engagement means, furthermore, a holding portion for holding a condition that
the ratchet teeth and the retainer spring member are engaged with each other and a condition that a disengagement between
the ratchet teeth and the retainer spring member is released and the ratchet teeth are formed of a harder member than the
body, and having a strip shape to be wrapped around the circumferential surface of the body, said harder member is a discrete
member from the body.
|
