Patent ID: 9016183
Filing Date: 2015-04-28
Classification: B26D,B26F,Y10T

Abstract:
1. A sheet material punching device, comprising: a plurality of punches provided in a longitudinal direction of a frame; a driving mechanism having a drive gear capable of transmitting a rotational driving force of a driving source; a slide arm allowed to reciprocate along the longitudinal direction of the frame, the slide arm making the plurality of punches reciprocate in a punching direction along with a reciprocating motion of the slide arm; a cam provided in the slide arm and capable of converting a rotational motion of the driving mechanism into the reciprocating motion of the slide arm; a cam follower provided in the drive gear or a rotary member that rotates integrally with the drive gear to be engaged with the cam; an auxiliary cam provided in the slide arm, the auxiliary cam being capable of moving the slide arm to a predefined initial position by converting the rotational motion of the driving mechanism into a backward movement in the reciprocating motion of the slide arm; and an auxiliary cam follower provided in the drive gear or the rotary member that rotates integrally with the drive gear to be engaged with the auxiliary cam.