Core body locking device of a core drill, and core body for...

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 51/04 (2006.01) B23B 31/113 (2006.01)

Patent

CA 2387352

It is an object to provide a locking device of a core drill which automatically locks a core body when the core body is attached to a base body, the coupling relation between the base body and the core body being fixed unless an unlocking operation is performed by an act of worker, wherein in the core drill including the base body and the core body which are connected to each other by the engagement of an engagement projection with an engagement concave portion, an engagement pawl of the locking device is disposed on the base body, and under the condition that the engagement projection engages the engagement concave portion, the engagement pawl being biased by a compression spring is caused to descend to a back portion of the engagement projection to fix the engagement projection within the engagement concave portion thereby locking the core body.

Cette invention se rapporte à un dispositif de verrouillage de corps de mandrin pour un foret-aléseur, qui verrouille automatiquement un corps de mandrin, lorsqu'un corps de base est couplé au corps de mandrin et dans lequel, à moins qu'une opération de déverrouillage ne soit effectuée artificiellement, la relation de couplage entre le corps de base et le corps de mandrin est fixe. Ainsi, dans ce foret-aléseur qui couple le corps de base au corps de mandrin par engagement d'une partie saillante dans une partie évidée, le dispositif de verrouillage pourvu d'une griffe de verrouillage est disposé sur le corps de base, la griffe de verrouillage est abaissée, de façon à produire un effet de verrouillage, à l'arrière de la partie saillante d'engagement, pendant que la griffe de verrouillage est activée par un ressort sous compression dans une position où la partie saillante s'engage dans la partie évidée, pour fixer la partie saillante à l'intérieur de la partie évidée, afin de verrouiller le corps de mandrin.

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