| 摘要 |
<p>A core body lock device of a core drill which automatically locks a core body when a base body is coupled to the core body and, unless an unlocking operation is performed artificially, the relation of coupling between the base body and the core body is fixed, wherein, in the core drill which couples the base body to the core body by the engagement of an engaging projection with an engaging recessed part, the lock device having a locking claw is disposed on the base body, the locking claw is lowered lockingly to the rear part of the engaging projection with the locking claw energized by a compression spring under the condition that the engaging projection is engaged with the engaging recessed part to fix the engaging projection to the inside of the engaging recessed part so as to lock the core body.</p> |
