Patent ID: 9701498
Date: 2017-07-11
CPC Classifications: B65H

Claim:
1. A corrugated paperboard sheet feeding apparatus comprising: a plurality of sheet feeding rollers rotatable to feed a bottommost one of a plurality of stacked corrugated paperboard sheets; an up-and-down member movable up and down with respect to the plurality of sheet feeding rollers; a drive motor for causing the up-and-down member to be moved up and down; a motion conversion mechanism configured to convert a unidirectional rotation of the drive motor into a motion for causing the up-and-down member to be moved up and down, and transmit the converted motion to the up-and-down; and an up-and-down control section configured to perform variable speed control for the unidirectional rotation of the drive motor, according to a given up-and-down speed control pattern, wherein the up-and-down control section is operable to change the up-and-down speed control pattern in conformity to a sheet length of the corrugated paperboard sheet in a feeding direction, wherein the up-and-down speed control pattern is set to cause the up-and-down member to undergo one cycle of up-and-down motion, the up-and-down speed control pattern comprising: a first region for moving down the up-and-down member which is located above the plurality of sheet feeding rollers, the first region comprising sub-regions for acceleration and deceleration of the drive motor; a second region for controlling the rotation of the drive motor to allow the up-and-down member to be located below the plurality of sheet feeding rollers; a third region for moving up the up-and-down member which is located below the plurality of sheet feeding rollers, the third region comprising sub-regions for acceleration and deceleration of the drive motor; and a fourth region for controlling the rotation of the drive motor to allow the up-and-down member to be located above the plurality of sheet feeding rollers.