| 摘要 |
When an attachment surface of. a device body is attached to or detached from an end face of a spindle head, the device body is rotated in a stable posture. A spindle attachment device includes a device body having an attachment surface detachably attached to an end face of a spindle head, fixed teeth and movable teeth for moving the device body in a direction of a axial line of a spindle to engage the spindle head and the device body with each other so as to freely restrict or release rotation of the device body with respect to the spindle head about the axial line of the spindle, a compressed coil spring for urging the device body so that the attachment surface of the device body is pressed onto the end face of the spindle head with the fixed teeth and the movable teeth being ready for engagement, a fluid pressure cylinder for causing a fluid pressure to act on the attachment surface of the device body against spring force of the spring so as to release engagement between the fixed teeth and the movable teeth, and a key and a key groove for transmitting rotation of the spindle to the device body with the fluid pressure of the cylinder acting on the attachment surface of the device body.
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