Seaming device

Abstract

Provided is a seaming device that makes it possible to easily adjust an axial load applied to a can during seaming and that makes it possible to prevent the buckling of the can without any shock load being applied, apply a constant axial load according to a decrease in the height of the can during the seaming, and achieve the high speed of a seaming process. The seaming device has a can placement unit ( 110 ) that places a can (C), a chuck unit ( 120 ) provided opposite the can placement unit, and a seaming roll ( 131 ) that seams a lid (F) onto the can (C). The can placement unit ( 110 ) has a pressing mechanism ( 111 ) that operates by fluid pressure and elastically upwardly presses a plate ( 112 ) on which the can (C) is placed.

1 . A seaming device comprising a can placement unit that places a can, a chuck unit provided opposite the can placement unit, and a seaming roll that seams a lid onto the can, wherein
 the can placement unit has a pressing mechanism that elastically upwardly presses a plate on which the can is placed, and   the pressing mechanism is configured to operate by fluid pressure.   
     
     
         2 . The seaming device according to  claim 1 , comprising a vertical movement mechanism that vertically moves the can placement unit. 
     
     
         3 . The seaming device according to  claim 2 , wherein
 the vertical movement mechanism is configured so as not to operate during a seaming operation of the seaming roll.   
     
     
         4 . The seaming device according to  claim 1 , wherein
 rotation of the plate of the can placement unit and a chuck of the chuck unit and the seaming operation of the seaming roll are performed by driving sources that are controlled independently.   
     
     
         5 . The seaming device according to  claim 1 , wherein
 the chuck unit comes in contact with the lid only at the chuck thereof, and   the chuck centers and presses the lid.   
     
     
         6 . The seaming device according to  claim 1 , wherein
 the chuck has lid adsorption means, and   the lid is centered by the lid adsorption means.   
     
     
         7 . The seaming device according to  claim 1 , comprising an infeed conveyor that supplies the can to a seaming turret, and a lid supply unit that has a lid supply device to supply the lid and a lid conveyance turret, wherein
 the infeed conveyor, the lid supply device, and the lid conveyance turret have respective driving sources that are controlled independently.   
     
     
         8 . The seaming device according to  claim 4 , wherein
 the driving sources are servo motors.   
     
     
         9 . The seaming device according to  claim 7 , wherein
 the seaming turret has detection means for detecting a position of a pocket,   a conveyance path of the infeed conveyor has a pitch sensor that detects an attachment of the infeed conveyor,   a speed of the infeed conveyor is controlled by an output of the detection means, and   a position of the attachment with respect to pockets of the seaming turret and the lid conveyance turret are controlled by an output of the pitch sensor.   
     
     
         10 . The seaming device according to  claim 1 , wherein
 the pressing mechanism has a diaphragm that seals the fluid pressure.   
     
     
         11 . The seaming device according to  claim 1 , wherein
 the chuck unit has a rotary wing pump that forcibly discharges lubricant.