JP2002019738A - Reshaping method and device for packaging body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reshape a film welded trace at the front and the rear of respective packaging bodies which are fed out from a bag-making-filling-packaging machine with a specified interval without reducing the packaging body producing performance of the packaging machine. SOLUTION: Respective tray packaging bodies 14 which are longitudinally carried out from the bag-making-filling-packaging machine are transferred to an intermediating conveyor 16 by performing a direction change at 90 deg. on the flat plane while being carried by a conveyor 15 by transferring from a carrying out conveyor 10 to the fan-shape track conveyor 15. Then, the packaging bodies 14 transfer to a carrying conveyor 25 by the intermediating conveyor 16 while keeping the sideways state. During the carrying by the carrying conveyor 25, heating plates 40, which are arranged on both sides, intensively heat both ends of the packaging bodies and contract the film welded sections. The bag-making performance to a general size tray of a so-called lateral pillow type bag-making-filling-packaging machine is approximately from 60 to 100 per minute. By performing the direction change of the packaging bodies 14 to the sideways state, both end welded sections are simultaneously heat-treated by the heating plates 40. Therefore, the heat-treatment can be performed while continuing the bag-making performance of the bag-making-fillingpackaging machine as is.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the shaping of a shrink film placed on a tray for accommodating articles to be packaged, that is, to the shaping of both ends of a cylindrical film covering the tray.

[0002]

After a strip-shaped shrink film drawn at the same speed is successively formed into a tube on a tray row moving in a straight line at equal intervals, the tube film is placed between the trays. As shown in FIG. 7, the bag making / filling and packaging machine that cuts and seals with the fusing blade can produce trays 95 for accommodating articles to be packaged 99 as a package one after another covered with bags 98, and then heats the entire film 98. Tension caused by heat shrinkage in the tunnel creates a transparent feeling in the film, thereby increasing the commercial value of the package. However, both ends 96 of the film 98,
In 97, there is a problem that a cut mark by the fusing blade, that is, a mark of keloid vitrified by the heat insulation protrudes, and the remaining mark significantly impairs commercial value.

[0003]

Therefore, the present invention is intended to arrange both ends of a bag in a good format and without reducing the efficiency of the bag making and filling machine.
After the strip-shaped shrink film drawn out at the same speed is covered while sequentially forming into a tube, a bag-making and filling machine for cutting and sealing the tube film between the respective trays with a fusing blade, and a carry-out conveyor of the bag-making and filling and packaging machine. The fan-shaped track conveyor for changing the direction of the package to be carried out to a horizontal direction of a 90-degree angle in a plane and carrying the package from the side of the intermediate conveyor onto the intermediate conveyor, and the laterally conveyed by a transfer conveyor arranged in series with the intermediate conveyor. In order to heat the fusing portions at both ends of the package, the package is constituted by heating plates installed on both sides of the package transport area.

[0004] Each tray package to be conveyed in parallel from the bag making and filling machine is transferred from the unloading conveyor to the sector-shaped orbital conveyor so that the direction of the plane is changed by 90 degrees during transfer by the conveyor, and transferred to the intermediate conveyor. After that, the package is transferred to the transfer conveyor by the intermediate conveyor in the horizontal state, and the heating plates arranged on both sides concentrate the both ends of the package during the transportation by the conveyor to shrink the film fusing portion. The bag making capacity of a bag making and filling machine called a horizontal pillow for a tray of a general size is approximately 60 or more and 100 or less per minute. As described above, by changing the direction of the package in the horizontal direction, the fusing portions at both ends are simultaneously heat-treated by the heating plate, so that the bag making capacity of the bag making and filling machine can be continuously processed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An unloading conveyor 10 shown in FIG. 1 is an accessory of a bag making and filling machine, and is a tray 1 for accommodating articles to be packed.
When the tube film 12 is transported, the fusing blade 13 blows the tube film 12 between the trays to produce packages 14 one after another.
Feeds the package 14 into the sector track conveyor 15. Then, as shown in FIG.
During the conveyance, the plane is turned 90 degrees and the package 1
4 is transferred onto the intermediate conveyor 16 from the side of the intermediate conveyor 16.

[0006] The intermediate conveyor 16 is formed by supporting six endless parallel string belts 17 on pulleys 18 and 19 and forming guide roller groups 20 in parallel in the gaps between the respective string belts 19. I do. On the other hand, as shown in FIG. 3, the support frame 21 of each of the guide rollers 20 can move up and down along a pair of guides 22 on both sides.
3 shows the upper surface of the guide roller group 20 with the cord belt 17
The package 14 fed from the fan-shaped track conveyor 15 in FIG. 2 is guided to the center of the intermediate conveyor 16 by the guide roller group 20 because the package 14 is installed at a position slightly higher than the upper surface of the intermediate conveyor 16. At the same time, the fluid cylinder 23 is
As a result, the string belt 17 rotated by the power of the motor 24 feeds the package 14 between the transfer conveyor 25 arranged in series with the intermediate conveyor and the urethane rubber belt 26 thereon.

Since the timing of unloading the package by the bag making and filling machine is constant, the fluid cylinder 23 is moved up and down in accordance with the timing. However, the package 14
The fluid cylinder 23 is detected by a sensor 27 for monitoring the movement of the fluid cylinder.
It is more certain to control the operation timing of. When the movement of the motor 24 is intermittently controlled by an input signal to the sensor 27 and the package 14 is fed in the direction of the transfer conveyor 25 by the attachment 28 supported by the string belt 17, the time loss is further reduced.

FIG. 4 shows a plane view of a transfer conveyor 25 arranged in series with the intermediate conveyor 16 of FIG.
At the last position, a heating tunnel 29 for thermally shrinking the entire package is provided. A screw rod 31 rotatably mounted between a pair of fixed frames 30 on both sides in FIG. 5 has screw grooves 32 having different directions at both ends, and female screw portions 35 of a movable frame 34 are respectively engaged with these screw groove portions. I do. Therefore,
By rotating the screw rod 31 with the handle 36, the two movable frames 34 relatively approach and separate from each other, and the width of the package 14 is added to both sides of the heating plate 40 and FIG.
, The distance between the side belts 41 can be adjusted.

A rotating shaft 44 is vertically supported on the base plate 43 on each of the movable frames 34, and the heating plate 40 is attached to each of swing links 45 fixed to the lower ends of the rotating shafts 44. Further, both levers 46 fixed to the upper end of the rotating shaft 44 are connected to an operating device 47 such as a solenoid or an actuator installed on a base plate. By the pulling of the lever 46 by the operating device 47, the interval between the both-side heating plates 40 is usually expanded to be equal to or larger than the width of the package 14, but the pull of the operating device 47 is synchronized with the timing at which the package 14 enters. By releasing the force, the two heating plates 40 approach the package 14 due to the reaction force of the coil spring (not shown).

As shown in FIG. 6, the heating plate 40 has a cartridge heater 50 therein and an inclined groove 52 descending in the traveling direction 51 of the package body on the opposing surface thereof. The fusing traces at both ends of the moving package body are made to flow downward, and the film around the traces is thermally shrunk to be shaped. At the same time, a hot plate 49 disposed below the transfer conveyor 25 causes the film shrinkage heat to act on the bottom surface of the package 14.

A cooling mechanism 55 for cooling these side belts 41 is provided inside each side belt 41 in FIG.
And rapidly cures both ends of the heat-shrinkable package.
As a result of such a hardening action, both ends 96 and 97 are pulled up to the upper surface of the tray 95 even if the package receives heat in the rear heating tunnel 25 and the upper film of the package 14 thermally contracts in FIG. Is prevented, and the beauty of the package can be maintained.

[Brief description of the drawings]

FIG. 1 is a plan view of the entire apparatus.

FIG. 2 is a partially enlarged view of the preceding figure.

FIG. 3 is a view taken along the line III-III in the preceding figure.

FIG. 4 is a plan view of a transfer conveyor.

FIG. 5 is a view taken along the line VV in FIG.

FIG. 6 is a front view of a heating plate.

FIG. 7 is a perspective view of a package.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Conveyance conveyor 11 ... Tray 12 ... Tube film 13 ... Fusing blade 14 ... Packaging body 15 ... Sector-shaped track conveyor 16 ... Intermediate conveyor 17 ... Parallel string belt 20 ... Induction roller group 23 ... Induction roller group lowering means 24 ... Motor 25 ... Transfer conveyor 26 ... Holding belt 27 ... Sensor 28 ... Attachment 29 ... Heating tunnel 40 ... Heating plate 41 ... Side belt 44 ... Rotating shaft 45 ... Swing link 47 ... Operating mechanism 50 ... Cartridge heater 52 ... Inclined groove 55 ... Cooling mechanism

Claims (6)

[Claims] 1. A strip-shaped shrink film drawn out at the same speed is placed on a row of trays moving in a straight line at equal intervals in a tubular manner, and then the tube film is cut between the trays by a fusing blade. A bag-making and filling machine to be sealed, and a transfer conveyor for shrinking the film of each package carried out of the carry-out conveyor of the bag-making and filling machine one after another by means of heat irradiation, and the transfer conveyor and the transfer conveyor Between the step of changing the direction of the package body to a horizontal angle of 90 degrees between planes, and the step of intensively applying heat to both ends of the package body conveyed by the transfer conveyor after the direction change, and shaping and shrinking the fusing section at both ends. How to be. 2. A strip-shaped shrink film drawn out at the same speed is placed on a row of trays moving in a straight line at equal intervals in a tubular manner, and then the tube film is cut between the trays by a fusing blade. A bag-making and filling machine to be sealed, a fan-shaped track conveyor for changing the direction of a package carried out from an unloading conveyor of the bag-making and packing machine in a horizontal direction of 90 degrees in a plane, and the fan-shaped track conveyor conveys the package using the fan-shaped track conveyor. From the side surface of the package, and a means for transporting the fusing portions at both ends of the package between the heating plates provided on both sides of the package transport area by a transfer conveyor arranged in series with the mediator conveyor. Device. 3. An intermediate conveyor, which is arranged in series with a transfer conveyor, is formed by a number of parallel string belts rotating in the transfer direction of the transfer conveyor, and a group of guide rollers arranged in parallel with a gap between each of the string belts. The upper surface of the guide roller group is installed at a position higher than the upper surface of each of the string belts, and the guide roller group is lowered in accordance with the loading timing of the package via the guide conveyor onto the intermediate conveyor,
3. The apparatus according to claim 2, wherein said intermediate conveyor moves the package toward a transfer conveyor. 4. The apparatus according to claim 3, wherein an attachment is attached to the parallel string belt of the intermediate conveyor, and the attachment pushes the package to the transfer conveyor. 5. A means for arranging a pressing belt on a package to be conveyed by a transfer conveyor and for bringing a heating plate close from both sides of the package in accordance with the passage timing of the package by the transfer conveyor. An apparatus according to claim 1. 6. The apparatus according to claim 2, wherein an inclined groove is provided on an inner surface of the heating plate, the inclined groove being inclined downward in the package conveying direction.