Shredder paper feed mechanism and paper feeder

Abstract

A shredder paper feed mechanism and paper feeder that, simply by setting a paper stack in the paper tray, enable a stack of document sheets to be fed to the shredder in an amount that matches the shredding capability of the shredder. This is done by using first and second rotating members equipped with claw members. The paper feed mechanism utilizes the transmitted rotary driving force of the shredder unit. The paper feed mechanism has a first rotating member having disc-shaped claw members with sharp portions for feeding the paper sheets, and rotation members; a transport roller; a second rotating member that limits the number of paper sheets that are fed onwards, and also has disc-shaped claw members with sharp portions for feeding the paper sheets, and rotation members; and a pressure roller that presses against the second rotating member to thereby grip and feed the paper sheets.

1 . A shredder paper feed mechanism that utilizes transmission of a rotary driving force of a shredder unit in which paper sheets arc shredded by intermeshed cutting blades, which paper feed mechanism comprises:
 a first rotating member having disc-shaped claw members with sharp portions for feeding paper sheets, and rotation members;   a transport roller that feeds a stack of paper sheets fed by the first rotating member;   a second rotating member that limits the number of paper sheets in the stack fed by the transport roller and has disc-shaped claw members with sharp portions for feeding paper sheets, and rotation members; and   a pressure roller in contact with the peripheral surface of the second rotating member to thereby grip and feed the paper sheets.   
     
     
         2 . A paper feed mechanism according to  claim 1 , wherein the sharp portions of the disc-shaped claw member are formed substantially perpendicular to the periphery of the disc-shaped claw member. 
     
     
         3 . A paper feed mechanism according to  claim 1 , wherein the sharp portions of the disc-shaped claw member are formed on the periphery of the disc-shaped claw member with tips of the claws pointing in the direction of rotation. 
     
     
         4 . A shredder paper feeder that utilizes transmission of a rotary driving force of a shredder unit in which paper sheets are shredded by intermeshed cutting blades, the paper feeder comprising:
 a paper feeding tray having a floor with openings on which paper sheets to be shredded are set and held;   a paper feed mechanism comprising disc-shaped claw members with sharp portions for feeding paper sheets, and rotation members, a transport roller that feeds a stack of paper sheets fed by the first rotating member, a second rotating member that limits the number of paper sheets in the stack fed by the transport roller and has disc-shaped claw members with sharp portions for feeding paper sheets, and rotation members, and a pressure roller in contact with the peripheral surface of the second rotating member to thereby grip and feed the paper sheets; and   a gear unit comprised of a group of a plurality of gears engaged with at least one gear mounted on an end portion of the rotary shafts of the first rotating member, transport roller and second rotating member to transmit power from a drive source.