Seal packaging machine for food container

Abstract

A seal-packaging machine for a food container is proposed. The seal-packaging machine includes: a tray for loading a food-carrying container into the seal-packaging machine configured to move stably forward/backward while engaging with a -shaped guide by a “”-shaped guide rail; a heater unit driving support shafts operating the heater unit upward/downward and a heater unit driving portion support plate connected thereto operating upward/downward by two roller bearings and two eccentric cams contacting the same; a motor fixedly provided on a bottom frame to drive upward/downward the heater unit driving support shafts and the heater unit driving portion support plate of a heater unit driving portion; and a heater unit evenly operating upward/downward while keeping in horizontal along the four heater unit driving support shafts provided on four sides. The seal-packaging machine prevents defects due to imbalance of the heater unit, thereby guaranteeing an accurate sealing operation with a film.

1 . A seal-packaging machine for a food container that is used to seal-package the food container with a film, the seal-packaging machine comprising:
 a tray ( 5 ) having a “ ”-shaped guide rail ( 15 ) that is attached to each of left and right end portions of a jig panel ( 13 ) and is engaged with a “ ”-shaped guide ( 17 ) provided on an inner wall surface of an outer casing ( 1 ), and loading the food container ( 3 ) seated in a container receiving hole ( 11 ) into the seal-packaging machine and pulling the food container ( 3 ) out of the seal-packaging machine, while slidingly moving back and forth;   a plurality of heater unit driving support shafts ( 25 ) being inserted into a plurality of bearings ( 23 ) provided on the inner wall surface of the outer casing ( 1 ) at positions around the tray ( 5 ), the heater unit driving support shafts ( 25 ) being configured to slidingly move up and down and respectively connected at upper and lower end portions thereof to heater unit support plates ( 36 ) and heater unit driving portion support plates ( 27 ) that are provided at left and right sides of the outer casing and extend in front and rear directions; and   a heater unit driving portion ( 9 ) having a roller bearing ( 29 ) provided on each of the left and right heater unit driving portion support plates ( 27 ), and being configured to move the heater unit driving support shafts ( 25 ) up and down according to an operation of an eccentric cam ( 31 ) provided in contact with the roller bearing ( 29 ).   
     
     
         2 . The seal-packaging machine for a food container of  claim 1 , wherein the tray ( 5 ) is coupled to a rack gear ( 19 ) attached to a bottom surface of the guide rail ( 15 ) and engaged with a pinion ( 21 ) provided inside the outer casing ( 1 ), so the tray ( 5 ) moves back and forth according to driving of a motor coupled to the pinion ( 21 ). 
     
     
         3 . The seal-packaging machine for a food container of  claim 1 , wherein the tray ( 5 ) is provided with the jig panel ( 13 ) having the container receiving hole ( 11 ) provided in a center thereof, thus enabling the food container ( 3 ) to be seated and loaded inside the container receiving hole ( 11 ). 
     
     
         4 . The seal-packaging machine for a food container of  claim 1 , wherein a heater unit ( 7 ) is mounted on bottom surfaces of the heater unit support plates ( 36 ) and is configured to seal-package an opening of the food container ( 3 ), while moving up and down according to an operation of the heater unit driving portion ( 9 ). 
     
     
         5 . The seal-packaging machine for a food container of  claim 1 , wherein a motor ( 35 ) for driving the eccentric cam ( 31 ) is fixedly provided on a bottom frame ( 33 ) of the outer casing ( 1 ) so that a load resulting from initial rotating force of the motor ( 35 ) is prevented from being transferred directly to the heater unit driving support shafts ( 25 ) and the bearings ( 23 ).