| 摘要 |
<P>PROBLEM TO BE SOLVED: To automatically turn a drill receiving spread plate when a drill is returned. <P>SOLUTION: A rotary gear is coaxially provided on the lower surface of a drill receiving spread plate holder so as to rotate together with it. The rotary gear can rotate synchronously with a driving gear attached on the lower surface of a slide plate. A click gear is coaxially provided on the driving gear so as to rotate together with it. The rotation of the click gear is intermittently controlled via a click bearing which is in pressure contact with the click gear. Further, a swing arm having an one-way clutch is built in so as to be coaxial with the driving gear and the click gear. The swing arm rotates by engaging with a pin attached to a base stand so as to vertically elongate with the sliding of the slide plate. A means is adopted to intermittently turn the drill receiving spread plate holder with the sliding of the slide plate by a specified angle synchronizing with the rotation of the driving gear coaxially provided with the swing arm. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
