Sheet hole punching device
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United States of America Patent
Stats
-
Jul 8, 2014
Grant Date -
Nov 29, 2012
app pub date -
May 30, 2012
filing date -
Mar 31, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
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