Seaming device

Abstract

Provided is a seaming device capable of preventing dents, caused by a can guide or a seaming turret pocket, and buckling resulting from the dents during seaming, and capable of improving seaming accuracy, by stabilizing the posture of the can being transferred when the can is supplied from an infeed conveyor. The seaming device ( 100 ) includes a can placement unit ( 110 ) that places a can (C), a seaming chuck unit ( 120 ) provided opposite thereto, and a seaming roll ( 131 ) that seams an opening of a can (C) and a lid (F). The can placement unit ( 110 ) includes a pressing mechanism ( 111 ) that presses a plate ( 112 ), on which a can is placed, resiliently upward. The seaming chuck unit ( 130 ) and the seaming roll ( 131 ) are configured to be capable of moving up and down.

1 . A seaming device comprising a can placement unit that places a can, a chuck unit that is provided opposite the can placement unit, and a seaming unit that seams a lid to the can,
 the can placement unit including a pressing mechanism that presses a plate, on which a can is placed, resiliently upward, and   the chuck unit and the seaming unit being configured to be capable of moving up and down.   
     
     
         2 . The seaming device according to  claim 1 , wherein the chuck unit and the seaming unit are famed integrally so as to move up and down by a single cam mechanism. 
     
     
         3 . The seaming device according to  claim 1 , wherein rotation of the plate of the can placement unit and rotation of a chuck of the chuck unit, and seaming operation by a seaming roll of the seaming unit are implemented by independently controlled power sources. 
     
     
         4 . The seaming device according to  claim 1 , further comprising an infeed conveyor that supplies cans to a seaming turret, and a lid feeding unit configured of a lid feeder that supplies lids and a lid transfer turret, wherein the infeed conveyor, lid feeder, and lid transfer turret each have an independently controlled power source. 
     
     
         5 . The seaming device according to  claim 3 , wherein the power sources are servomotors. 
     
     
         6 . The seaming device according to  claim 4 , wherein cans on which lids have been placed are supplied to the seaming turret by the infeed conveyor. 
     
     
         7 . The seaming device according to  claim 1 , wherein the chuck unit causes the chuck alone to make contact with a lid, and lowers the chuck to perform centering of the lid and pressing of the lid. 
     
     
         8 . The seaming device according to  claim 1 , wherein the chuck includes lid suction means and performs centering of the lid with the lid suction means, and after picking up the lid by suction, the chuck is lowered to place the lid on the can. 
     
     
         9 . The seaming device according to  claim 4 , wherein the seaming turret includes detection means for detecting positions of pockets,
 the seaming device further comprising a pitch sensor that detects attachments of the infeed conveyor on a transfer path of the infeed conveyor,   speed of the infeed conveyor being controlled, based on outputs of the detection means, and   positions of the attachments relative to pockets of the seaming turret and of the lid transfer turret being controlled based on output of the pitch sensor.   
     
     
         10 . The seaming device according to  claim 1 , wherein the chuck unit includes a rotary vane pump mechanism that forcibly discharges lubricating oil. 
     
     
         11 . The seaming device according to  claim 1 , wherein the pressing mechanism is configured to be operated by fluid pressure. 
     
     
         12 . The seaming device according to  claim 11 , wherein the pressing mechanism includes a diaphragm that seals the fluid pressure.