Seiko Corporation

Yuji Hasebe

Kenji Baba

Yoshinori Hoshino

A sheet hole punching device has a device frame bearing-supporting a plurality of punching members, a driving rotation shaft, a drive motor, a gear mechanism transmitting a rotation of the driving rotation shaft, cam mechanisms converting the rotational movement into vertical movement, and a motor control device. The gearing mechanism includes drive gears fixed on the driving rotation shaft and receiving gears to engage with the drive gears to transmit the rotational movement to the punching members. The cam mechanism includes cylindrical cams formed integrally to the punching members and cam followers fixed to the device frame. The cylindrical cams are provided with V-shaped groove cams to reciprocate the punching members between an upper dead point and a lower dead point. The punching members are rotated in one direction to punch holes in a sheet, and subsequently rotated in a reverse direction to punch holes in a following sheet.

Sheet hole punching device

A sheet hole punching device has a device frame; a plurality of punching members arranged in first and second groups, and arranged linearly on the device frame; a driving rotation shaft; a driving motor reciprocally rotating the driving rotation shaft; a gear mechanism transmitting a rotation of the driving rotation shaft; cam mechanisms converting the rotational movement; and a motor control device. The gearing mechanism includes drive gears disposed on the drive rotational shaft, and receiving gears disposed on the punching members to engage with the drive gears. The cam mechanisms include cam followers and cylindrical cams. The cylindrical cam has a V-shaped groove cam to reciprocate each of the punching members between an upper dead point and a lower dead point. The punching members are rotated in one direction to punch holes in first sheets, and subsequently rotated in a reverse direction to punch holes in following sheets.

Growing community of inventors

Minami-Alps, Japan

Yuji Hasebe