Inner module structure of auto strapping packaging tool

Abstract

Provided is an inner module structure of an auto strapping packaging tool including a tension module in which first power generated by a first dedicated motor disposed at a rear side is transmitted to a front side to provide a tensile force to a packaging plastic band, and a welding module which is disposed at one side of the tension module, and in which a gripper unit is opened or closed by second-1 power due to axial rotation in a forward direction of a second dedicated motor disposed at a rear side, and the gripper unit linearly reciprocates by second-2 power due to axial rotation in a reverse direction of the second dedicated motor to provide a friction force to the plastic band to which the tensile force is applied through the tension module.

What is claimed is: 
     
         1 . An inner module structure of an auto strapping packaging tool, comprising:
 a tension module in which first power generated by a first dedicated motor disposed at a rear side is transmitted to a front side to provide a tensile force to a packaging plastic band; and   a welding module which is disposed at one side of the tension module, and in which a gripper unit is opened or closed by second-1 power due to axial rotation in a forward direction of a second dedicated motor disposed at a rear side in the welding module, and the gripper unit linearly reciprocates by second-2 power due to axial rotation in a reverse direction of the second dedicated motor to provide a friction force to the plastic band to which the tensile force is applied through the tension module,   wherein each of the tension module and the welding module is formed in units of modules, and driving of the tension module and the welding module is individually controlled.   
     
     
         2 . The inner module structure of  claim 1 , wherein each of the first dedicated motor and the second dedicated motor includes a flat motor. 
     
     
         3 . The inner module structure of  claim 1 , wherein the welding module further includes:
 an opening and closing unit which is coupled to an upper portion of the gripper unit and provides vertical movement for the gripper unit to open or close the gripper unit through an operation according to axial rotation when the second-1 power is transmitted; and   a belt pully part which is disposed between the second dedicated motor and the opening and closing unit to transmit the second-1 power between the second dedicated motor and the opening and closing unit.   
     
     
         4 . The inner module structure of  claim 3 , wherein the opening and closing unit includes:
 a first driven shaft which is driven by the second-1 power transmitted by the belt pully part and has a first eccentric element formed on an outer circumferential surface;   a head part through which the first driven shaft passes, in which the first eccentric element is in contact with an inner side surface and which performs cam movement according to axial rotation of the first driven shaft; and   a connecting rod part having one end coupled to a lower side of the head part and the other end coupled to the gripper unit to vertically move the gripper unit according to movement of the head part.   
     
     
         5 . The inner module structure of  claim 4 , wherein an elastic member, which buffers vibration generated by linear reciprocating movement of the gripper unit, is disposed on an outer circumferential surface of the connecting rod part. 
     
     
         6 . The inner module structure of  claim 1 , wherein the gripper unit includes:
 a second driven shaft which is driven by the second-2 power and has a second eccentric element formed on an outer circumferential surface;   an inner gripper part in which a half ring piece formed at one end of the inner gripper part is held on the second driven shaft to linearly and slidably reciprocate due to cam movement according to axial rotation of the second driven shaft, and guide protrusions are formed on both side surfaces; and   an outer gripper part of which one end is axially rotatably coupled to the second driven shaft, and in which the inner gripper part is accommodated and slidably enters or exits.   
     
     
         7 . The inner module structure of  claim 6 , further comprising a spur gear part disposed between the second dedicated motor and the gripper unit to transmit the second-2 power between the second dedicated motor and the gripper unit.