JP2005029226A - Gusseting device for packaging film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To always uniformly gusset the sealing parts of a tube film even if there is an error in the width of the contents to be packaged of the tube film. <P>SOLUTION: A pair of nozzles 70 arranged at both sides of the tube film 11 are fixed to a member 22 which reciprocates in the direction of the movement of the tube film 11 in synchronization with the box motions of cross sealers 12 and 13, which seal the film 11. Also, the emitting openings of both the nozzles 70 are located at both sides of the tube film before or after the cross sealers 12 and 13 so as to be opposite to each other. The gussets are pushed into both the sides of the tube film 11 by air pressure emitted from the nozzles 70. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for forming pleats by pressing a side surface of a packaging tube film formed into a tube around each package to be transported in series at equal intervals between the packages.

  The bag making filling and packaging machine sequentially forms a belt-like film around each package to be conveyed in series at equal intervals, and sandwiches the tube film between the packages with a cross sealer to When each packaged object is to be welded in isolation, generally, the tube film is pushed and welded from both sides so as to form pleats at the seal portion. By pushing in the film, the width of the film can be narrowed at the welded portion and can be gathered together in a good appearance.

The conventional pleating apparatus is configured to push a tube film from both sides using a metal plate, and forcibly pushing the metal plates against the film breaks the film. Therefore, whenever the width of the package is changed, In addition, the momentum of the metal plate has to be adjusted.
JP 10-059308 A

  In the present invention, the belt-like film is sequentially formed along the longitudinal direction around the packages to be transported at equal intervals in the vertical direction, and the tube film is placed between the packages in the transport direction of the films. In a bag making and filling and packaging machine for isolating and welding each packaged article by clamping with a pair of cross sealers that move along the box motion along the box motion movement of the cross sealer, a pair of nozzles arranged on both sides of the tube film The nozzle is fixed to a member that reciprocates in the moving direction of the tube film, and the nozzle outlets of the two nozzles are opposed to each other from both sides of the tube film on the front side or the rear side of the cross sealer.

  The gusset forming apparatus of the present invention applies air pressure from a nozzle installed on both sides of a pair of seal bars toward a tube film passing between the two seal bars, and jets air from both nozzles to the film. The pressure reach from the nozzle is relatively deep, and the air pressure has a cushioning property, so that even if there is a considerable difference in the width of the tube film, it is possible to form a gusset in almost the same state. is there.

  The purpose of forming folds in the cross seal part with the packaging tube film has been realized by air pressure without using a small number of parts and a complicated control mechanism.

  FIG. 1 is a plan view of an apparatus according to the present invention, in which a bag making filling and packaging machine covers a package film 10 to be transported at equal intervals in columns, and then covers a pair of upper and lower seal bars 12, 13, the tube film 11 is cross-sealed to isolate each package 10. In the drawing, reference numeral 14 denotes a pair of side belts that sandwich and carry the article to be packaged, and 15 denotes a belt conveyor that carries and carries the article to be packaged 10.

  FIG. 2 is a side view of the apparatus, and the pair of sealers 12 and 13 perform a box motion motion 17 in a symmetric direction along the moving direction 16 of the tube film, and the tube film 11 is moved in the course of the motion. In detail, as shown in FIG. 3, the three gears 50, 51, 52 engaged with each other are interlocked by the power of the lowermost driving gear 50, and the first gear 51 and the first gear 51 The crank pins 53 and 54 of the two gears 52 are rotated in opposite directions, and the pair of sealers 12 and 13 are moved toward and away from each other by the crank pins 53 and 54.

  More specifically, as shown in a partial front view of FIG. 4, cranks 56 are provided at both ends of the shaft 55 of the second gear 52 supported by the frame 60, and the sleeves 57 are fixed to the crank pins 54 of the respective cranks. While fixing the already described lower sealer 13 to the frame member 59, the upper sealer 12 already described is fixed to the lower surface of the frame member 62 on the rod 61 slidably supported by both the sleeves 57. The cutting blade 63 installed in the sealer is configured so as to be operated by the fluid cylinder 64 installed on the frame member.

  FIG. 5 is an explanatory diagram of a part of the lower region of the previous figure. A motor 65 supported by the frame 60 drives the driving gear 50, and a crank 67 fixed to the shaft 66 of the first gear 51 is connected via a pin 53. In the structure connected to the rod 61 already described, the rod 61 and the sleeve 57 are displaced in opposite directions, and as a result, the sealers 12 and 13 in FIG.

  In FIG. 2, the member 22 supporting the pulleys 20 and 21 of the belt conveyor 15 cooperates with the sealer 13 and reciprocates in the direction of the arrow in synchronization with the box motion motion 17 of the sealer. Transfer of the article to be wrapped onto the belt conveyor 15 is smooth.

  In FIG. 1, the base-shaped member 22 is configured to slide along grooves formed in the machine bases 23 on both sides. As a result, the pair of nozzles 70 supported by the member 22 are integrated with the member 22 and The reciprocating motion is synchronized with the sealers 12 and 13, but an on / off valve 73 installed in a line 72 connecting the nozzle 70 and the air machine 71 controls the timing of air ejection from both the nozzles 70. The compressed air is blown out at least slightly before the sealers 12 and 13 sandwich the tube film 11 from the nozzle outlets facing each other along the sealer surface, thereby forming pleats on both side surfaces of the tube film 11.

  It can also be diverted to a device that reciprocates the nozzle 70 in accordance with a two-axis rotary sealer that replaces a cross sealer that moves in a box motion.

Plan view of the device Side view of previous figure Sierra simplified side view Partial front view of the sealer Partial front view of the sealer

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Package 11 Tube film 12, 13 Sealer 15 Belt conveyor 17 Box motion 22 Reciprocating member 50, 51, 52 Gear 53, 54 Crank pin 57 Sleeve 61 Rod 65 Motor

Claims (2)

  A belt-like film is successively formed along the longitudinal direction of the package to be transported at equal intervals in the vertical direction, and the tube film is moved between the respective packages in the box motion along the transport direction of the film. In a bag-filling and packaging machine for isolating and welding each packaged article by clamping with a pair of moving cross sealers, a pair of nozzles arranged on both sides of the tube film are synchronized with the box motion movement of the cross sealer. A pleating device that is fixed to a member that reciprocates in the moving direction of the tube film, and that the outlets of the two nozzles face each other from both sides of the tube film on the front side or the rear side of the cross sealer.   The on / off valve is interposed in a line for sending compressed air to the pair of nozzles, and the on / off valve is maintained in an open state at least immediately before the cross sealer clamps the tube film between the packages. Equipment.