JPH0656110A - Film tension mechanism in packaging machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a film tension mechanism in a packaging device capable of performing film pulling while the film 1 is always tensioned properly from the first film pulling after the film is set. . [Structure] A film 1 is pulled out from a film supply unit 2, and a heat sealing device 5A, a cutting device 7, and a feeding and holding roller 19 are provided.
A, package storage device (opening device) 6, feeding and holding roller 19
B, the cutting / cutting device 16 and the heat sealing device 15B are used to chuck the pull-out tip 18 to the film pull-out chuck device 4 to form a vertical seal, a vertical cut edge, an opening, a package storage, a horizontal seal, a cutting cut, and a discharge. The film tensioning mechanism 3 of the wrapping device is configured to automatically repeat the film wrapping bag 15 in which the wrapping 13 is continuously packed by continuously repeating the transfer, and to automatically apply the tension to the loose film 1 at the time of film setting. Giving automatic tension control unit 11
The tension control unit 3 provided with.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film tension mechanism in a packaging device for enclosing a package in a film and automatically packaging film bags containing the package one after another.

[0002]

2. Description of the Related Art As a packaging apparatus of this type, a film tension mechanism for tensioning the film at a predetermined pressure is provided in a film supply section for drawing and supplying a film of a predetermined width, and the leading end of the film is chucked and pulled. A film pull-out chuck device is provided on the side opposite to the film supply section,
A packaging device has been proposed in which a heat seal device, a package storage device, and a cutting device are provided between the film supply unit and the film pull-out chuck device.

In this case, a film having a predetermined width whose upper end side is folded in a V shape is pulled by a film pull-out chuck device to be pulled out from a film feeding portion, and the fed film is fed at a small interval. Two vertical seals are applied one after another with a heat-seal device at intervals of one bag, and these two vertical seals are cut in advance with a film cutting device leaving a little upper edge of the film, and these vertical seals are formed between the vertical seals. The upper opening of the film bag is opened by the package storage device and the package is loaded. In addition, the upper opening of the film bag after storing the package is horizontally sealed by a heat sealing device and sealed, and the uncut portion left in advance is cut off and cut by a cutting device, and the film packaging bag containing the package is successively cut. I am trying to transfer and discharge.

[0004]

In such a packaging device, the film is first set, but conventionally, the film is simply drawn from the film supply roller of the film supply unit and wound at a predetermined position of the film tension mechanism. It is only arranged by turning and arranging it at a predetermined position of the package storage device.

Therefore, at the time of setting the film, the film tension mechanism is not working yet, so that the film is set in a loose state.

Conventionally, since the first film pulling operation is started by the film pulling device in the loosened state,
The film could slip out of place, which was very dangerous.

It is an object of the present invention to provide an excellent film tension mechanism which surely solves the above-mentioned problems that occur during the initial operation after the film is set.

[0008]

The gist of the present invention will be described with reference to the accompanying drawings.

A film tension mechanism 3 for tensioning the film 1 at a predetermined pressure is provided in a film supply unit 2 for drawing and supplying a film 1 having a predetermined width, and a film pull-out chuck device for chucking and pulling the pull-out tip 18 of the film 1 4 is provided on the opposite side of the film supply unit 2, and the heat seal device 5, the package storage device 6, and the cutting device 7 are provided between the film supply unit 2 and the film pull-out chuck device 4 in the packaging device a. The film tension mechanism 3 is provided with a guide roller 8 for winding and arranging the film 1 to be drawn out and supplied to the film supply unit 2, and the guide roller 8 is movable by drawing out the film 1 by the film drawing chuck device 4. The guide roller 8 is provided with an urging body 9 for urging the guide roller 8 in the opposite direction with respect to the movable drawer. Te configured to apply tension to the film 1, the detection device 10 is provided for detecting the position of the guide rollers 8 the tension 1 may have an appropriate strength,
An automatic tension controller 11 for automatically controlling the movement of the guide roller 8 at an appropriate position detected by the detection device 10 is provided immediately before the film is moved after the film 1 is arranged. The present invention relates to the film tension mechanism 3 in the packaging device a.

[0010]

Operation: Before the first film pulling operation immediately after the film 1 is arranged at the predetermined position, the guide roller 8 of the film tension mechanism 3 in which the film 1 is wound is attached by the operation of the automatic tension controller 11. It forcibly moves against the biasing force of the bias body 9. This guide roller 8 is a detection device 1
Move to the position detected by 0 and stand still.

Therefore, the biasing force 9 biased by the guide roller 8 at this stationary position is automatically applied as tension to the film 1 after setting.

Therefore, the automatic tension control unit 11
The film pulling operation can be performed with the proper tension applied to the film 1 from the first film pulling after the film setting.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a schematic structure of this embodiment will be described with reference to FIGS.
It will be explained based on.

A film supply unit 2 for drawing and supplying a film 1 having a predetermined width in a folded and polymerized state with the upper part thereof facing the opening side.
Further, a tension mechanism 3 for tensioning the film 1 at a predetermined pressure is provided. A film pull-out chuck device 4 that chucks and pulls the pull-out front end 18 of the film 1 is provided on the opposite side of the film supply unit 2. The film supply unit 2 between the film supply unit 2 and the film pull-out chuck device 4
A heat sealing device 5A for vertically sealing 12 from the folded bottom of the film 1 to the opening slightly above is provided near the opening, and the upper opening of the film 1 is provided along the vertical seal 12 sealed by the heat sealing device 5A. A cutting device 7 is provided for performing vertical cutting to the front. This heat seal device 5
A feed / holding roller 19A / 19B for holding the film 1 is provided between the A and the film pull-out chuck device 4 at a predetermined interval in the pull-out / transport direction, and the feed / holding roller 19A / 19 is provided.
As a package storage device 6 between B, the upper opening portion of the film 1 is held and the films 1 are moved to the opposite outside.
An opening device 6 is provided to hold the superposed state from the superposed state to the open state. A heat seal device 5B which laterally seals 14 the upper end opening of the film 1 is provided between the pull-out moving position of the film pull-out chuck device 4 and the feed / holding roller 19B on the pull-out / transport side, and is located near the feed / holding roller 19B. A cutting and cutting device 16 for cutting and cutting the film 1 by cutting the film 1 in a continuous state with the cutting edge 20 by the cutting device 7 is provided. A film feeding device 21 is provided at the bottom of the film 1.

Next, the operation (operating procedure) in the above configuration
Will be explained.

When the film pull-out chuck device 4 chucks the pull-out leading end 18 (cut end by the cutting and cutting device 16) of the film 1 located near the feeding and holding roller 19B on the pull-out transfer side and pulls out to the pull-out transfer position, the tension mechanism The film 1 is held in a tensioned state by 3 and is continuously drawn out from the film supply unit 2.

This film 1 is drawn out in a folded and folded state with its upper part on the opening side, and is heat-sealing device 5A, cutting device 7, feeding and holding roller 19A, package storage device (opening device) 6, feeding and holding roller 19B, and separating. The leading end 18 of the pull-out device is chucked to the film pull-out chuck device 4 through the cutting device 16 and the heat sealing device 5B.

In this state, the heat sealing device 5A heat-seals (vertical seal 12) from the folded bottom of the film 1 to the opening slightly above, and along the vertical seal 12 from the bottom of the film 1 by the cutting device 7. Cut vertically to the top opening.

Further, between the feeding and holding rollers 19A and 19B,
The upper opening of the film 1 is clamped by the opening device 6 and moved to the opposite outer side, respectively, and is held in the open state from the overlapping state, and the upper opening in this open state is connected by the vertical seal 12. The package 13 is placed and stored in the film 1 which is divided into the divided bags.

Next, when the storage of the package 13 is completed, the upper opening is closed by the package storage device (opening device) 6, but at this time, the storage of the package 13 has already been completed and the section at the position where the package 13 is pulled out and transferred. The opening of the split bag (divided bag located between the feeding and holding roller 19B and the film pull-out chuck device 4) is heat-sealed (horizontal seal 14) by the heat-sealing device 5B, and is closed by the heat-separating device 16. The film 1 (the film packaging bag 15 containing the package 13) is cut in a continuous state with the cutting edge 20 by the cutting device 7 located near the feeding and holding roller 19B, and the continuous upper part is cut. Then, the film feeding device 21 is actuated to discharge and move the separated film packaging bag 15 containing the package 13 and the film pull-out chuck device 4 returns to the rear side again and the pull-out tip end 18 (cut end by the cut-off cutting device 16) again. Then, the compartment bag that has finished storing the package 13 is pulled out and transferred.

As described above, the vertical sealing, the formation of the vertical cutting edge, the opening, the storage of the package, the horizontal sealing, the cutting and the discharging and the transferring are sequentially repeated, and the film packaging bag 15 enclosing the package 13 is automatically packaged. To be done.

Next, the film supply section 2 which is the gist of the present invention
The film tension mechanism 3 provided in the above will be described.

As shown in FIG. 4, the film 1 is wound around a film supply roller 22, and the film supply roller 22
Further, the film 1 is configured to be continuously drawn out in a vertical state in a folded and polymerized state with the upper part thereof on the opening side. Further, the film 1 thus drawn out is arranged on the fixed guide roller 23A, the movable guide roller 8 and the fixed guide roller 23B to the feeding and holding rollers 19A and 19B. The guide roller 8 is movably provided by pulling out the film 1 by the film pull-out chuck device 4, and the guide roller 8 is provided with an urging body 9 for urging the guide roller 8 in a direction opposite to the pull-out movable. There is.

In this embodiment, a biasing weight 9 is provided on the guide roller 8 as a biasing body 9 via a wire, and the load of the biasing weight 9 gives a biasing force to the guide roller 8 to apply a predetermined pressure tension. It is given to film 1.

In this embodiment, the guide roller 8 slightly raises the urging weight 9 to provide a detecting device 10 for detecting the moving position of the guide roller 8 which gives the film 1 an appropriate tension. .

Further, the automatic tension control section 11 is configured to reversely rotate the film supply roller 22 to pull back the film 1 and control the movement of the guide roller 8.

Therefore, in this embodiment, the film 1 manually pulled out from the film supply roller 22 is used as the fixed guide roller.
23A, the guide roller 8, the fixed guide roller 23B, and the feeding and holding rollers 19A and 19B are arranged, and when the film setting is completed, the automatic tensioning control unit 11 is operated to move the guide roller 8 to the position of the detection device 10 (film (From the position of the imaginary line shown in FIG. 4 to the position of the solid line where the tension at the time of setting is not applied), the film feeding roller 22 is automatically reversely driven against the biasing member 9 to rewind the film 1 to move. Thus, the tension by the biasing member 9 is automatically applied to the film 1 when setting the film. Therefore, the tension is properly applied to the film 1 from the initial pulling motion, and it is possible to prevent the problem that the film 1 comes off during the initial pulling due to the slack when setting the film 1 as in the conventional case.

Further, in this embodiment, the urging member 9 is provided with an urging force reducing device 24 for eliminating or reducing the urging force of the urging member 9 to the guide roller 8. The chuck device 4 is configured to be operated when the drawer device is movable. In addition, the operation operation portion of the automatic tension tension control portion 11 is provided at a position indicated by reference numeral 11 in FIG.

In this embodiment, a cylinder device 25 for lifting the urging weight 9 is provided as the urging force reducing device 24, and the urging weight 9 is lifted in synchronism with the pull-out of the film pull-out chuck device 4, and this urging force is applied when pulling out. The weight of the weight 9 is prevented from becoming a resistance so that the drawing resistance by the film drawing chuck device 4 is reduced.

Further, the film breakage detection device 26 is a detection device.
It is installed in parallel with the film 10, and when the film feed roller 22 loses the film 1 when the film is pulled, the guide roller 8 is pulled by the urging force 9 to detect that the film has returned to detect the film breakage, and the film pulling operation is performed. I'm trying to stop.

[0031]

Since the present invention is configured as described above, by the operation of the automatic tensioning control unit before the first film pulling operation immediately after the film is arranged at the predetermined position,
The film is automatically tensioned, so
From the first film pulling after the film is set, the film can be pulled with the proper tension being applied to the film, and there is a danger that the film will be pulled in a loose state as in the past and the film will come off. Film can be reliably prevented, and the tensioning after such film setting can be performed automatically, so one step of the standby setting work process is omitted, and the work efficiency is improved by that much. It becomes a tension mechanism.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a packaging device according to an embodiment.

FIG. 2 is a schematic configuration front view of the packaging device of the present embodiment.

FIG. 3 is an explanatory view of film cutting of the packaging device of the present embodiment.

FIG. 4 is an explanatory front view showing a tension mechanism of a film supply unit of the present embodiment.

[Explanation of symbols]

 1 film 2 film supply unit 3 film tension mechanism 4 film drawing chuck device 5 heat sealing device 6 package storage device 7 cutting device 8 guide roller 9 biasing body 10 detection device 11 automatic tensioning control unit 18 drawer tip a packaging device

Claims (1)

[Claims] 1. A film feeding chuck device for pulling and feeding a film of a predetermined width is provided with a film tension mechanism for tensioning the film at a predetermined pressure, and a film pull-out chuck device for chucking and pulling the leading end of the film is provided. The film tension mechanism in the packaging device provided on the opposite side to the film supply unit and the film pull-out chuck device and provided with a heat seal device, a package storage device, and a cutting device, supplies the film to the film supply unit. A guide roller for winding and disposing the film to be wound is provided, the guide roller is movably provided by pulling out the film by the film pull-out chuck device, and the guide roller is biased in the direction opposite to the pull-out movement. Attaching a force body to give tension to the film, Provided with a detection device for detecting the position of the guide roller where the tension has an appropriate strength,
In a packaging apparatus, which is provided with an automatic tensioning control unit for automatically controlling the movement of the guide roller at an appropriate position detected by the detection device before the film is moved immediately after the film is arranged. Film tension mechanism.