Device for converting flat pouch into tetrahedral pouch in rotary packaging machine

Abstract

A device for converting a flat pouch into a tetrahedral pouch in a rotary packaging machine including: grippers having gripper jaws and gripper rollers; a rotary shaft; and a barrel cam combined with the rotary shaft and reciprocating for a duration as long as one process of the grippers, with a cam portion provided on an upper part of the barrel cam to control the space between the gripper jaws; the device including: an arm unit combined with the rotary shaft and performing repeated reciprocation for a duration as long as one process of the rotary packaging machine; a rotary unit mounted to the arm unit; and a pouch clamping unit combined with the rotary unit to be rotated by the rotary unit, the pouch clamping unit clamping opposite sides of the mouth of the pouch while opening the mouth of the pouch inside the pouch.

What is claimed is: 
     
         1 . A device for converting a flat pouch into a tetrahedral pouch in a rotary packaging machine, the rotary packaging machine comprising: grippers ( 2 ) each having gripper jaws ( 2   a ) for clamping a pouch (P) and gripper rollers ( 2   b ) for actuating the gripper jaws ( 2   a ); a rotary shaft ( 3 ); and a barrel cam ( 4 ) combined with the rotary shaft ( 3 ) such that the barrel cam can reciprocate for a duration as long as one process of the grippers, the barrel cam ( 4 ) provided with a cam portion ( 4   a ) on an upper part thereof to control a space between the gripper jaws ( 2   a ); the device comprising:
 an arm unit ( 10 ) combined with the rotary shaft ( 3 ) of the rotary packaging machine ( 1 ) and performing repeated reciprocation for a duration as long as one process of the rotary packaging machine ( 1 );   a rotary unit ( 20 ) mounted to the arm unit ( 10 ); and   a pouch clamping unit ( 30 ) combined with the rotary unit ( 20 ) such that the pouch clamping unit can be rotated by the rotary unit, the pouch clamping unit clamping opposite sides of a mouth of the pouch (P) supplied thereto while opening the mouth of the pouch (P) inside the pouch (P).   
     
     
         2 . The device for converting the flat pouch into the tetrahedral pouch in the rotary packaging machine of  claim 1 , wherein the arm unit ( 10 ) includes:
 an arm ( 11 ) combined with the rotary shaft ( 3 ) of the rotary packaging machine ( 1 );   a side locking part ( 12 ) combined with the arm ( 11 ); and   an upper locking part ( 14 ) combined with both the side locking part ( 12 ) and the rotary unit ( 20 ).   
     
     
         3 . The device for converting the flat pouch into the tetrahedral pouch in the rotary packaging machine of  claim 2 , wherein the arm unit ( 10 ) further includes:
 a vertical moving unit ( 13 ) combined with the side locking part ( 12 ), the vertical moving unit vertically moving upward and downward the upper locking part ( 14 ) combined with the rotary unit ( 20 ).   
     
     
         4 . The device for converting the flat pouch into the tetrahedral pouch in the rotary packaging machine of  claim 1 , wherein the pouch clamping unit ( 30 ) includes:
 an actuator ( 31 ) combined with the rotary unit ( 20 ) such that the actuator can be rotated by the rotary unit ( 20 ); and   a pair of movable blades ( 32 ) moved to left and right by the actuator ( 31 ) such that the blades ( 32 ) open the mouth of the pouch (P) inside the pouch (P).   
     
     
         5 . The device for converting the flat pouch into the tetrahedral pouch in the rotary packaging machine of  claim 1 , wherein the barrel cam ( 4 ) of the rotary packaging machine ( 1 ) further includes:
 a gripper opening unit ( 40 ) including:
 an operating member ( 41 ) for pressurizing and releasing the gripper rollers ( 2   b ) of the grippers ( 2 ); and 
 an actuator ( 42 ) for actuating the operating member ( 41 ). 
   
     
     
         6 . The device for converting the flat pouch into the tetrahedral pouch in the rotary packaging machine of  claim 5 , wherein the actuator ( 42 ) of the gripper opening unit ( 40 ) is operated to be moved while continuously pressurizing the gripper rollers ( 2   b ) of the grippers ( 2 ) of the rotary packaging machine ( 1 ) until the gripper opening unit ( 40 ) reaches a next process.