| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a perforating device that rotates, raises and lowers a perforating drill by one motor and obtains a required height even if a main shaft of the perforating device is short. <P>SOLUTION: A drill socket with a hollow drill mounted thereon is mounted on a base table built in a body so as to be moved up/down. The drill socket is rotatably held to a base plate, on which a drive motor for the drill socket is mounted. According to the rotation of the drill socket, the base plate with the drill socket and the drive motor moves up and down, to move the hollow drill simultaneously. A nut internally threaded is attached to the base table, and the drill socket is externally threaded in its circumferential surface to allow both the nut and the circumferential surface to be screwed with each other, so that the drill socket can be moved up/down, thereby moving the base plate up/down by the axial force generated by the rotation of the drill socket. A transmission belt is stretched between a driving pulley of the drive motor and a driven pulley of the drill socket, thereby rotating the drill socket through a clutch structure. <P>COPYRIGHT: (C)2012,JPO&INPIT |
