JP2778636B2 - Film tension mechanism in packaging equipment - Google Patents

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 apparatus 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 kind, a film tension mechanism for stretching a film to 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 unloading chuck device is provided on the opposite side of the film supply unit,
A packaging device provided with a heat sealing device, a package storage device, and a cutting device between the film supply unit and the film unloading chuck device has been proposed.

In this case, a film having a predetermined width whose upper edge is folded in a V-shape is pulled by a film pulling chuck device and drawn out from a film supply section, and the transported film is spaced at a small interval. Two vertical seals are applied one after another by a heat sealing device at intervals of one bag, and the space between the two vertical seals is cut in advance by a film cutting device leaving a little upper end of the film, and formed between the vertical seals by the vertical seals. The upper opening of the film bag is opened by a package storage device, and the package is inserted. In addition, the upper opening of the film bag in which the package has been stored is horizontally sealed with a heat sealing device and sealed, and the remaining uncut portion is cut off and cut with a cutting device. And transfer and discharge.

[0004]

In such a packaging apparatus, a film is set first. Conventionally, however, a film drawn from a film supply roller of a film supply section is simply wound around a predetermined position of a film tension mechanism. It is simply turned around and placed at a predetermined position in the package storage device.

Therefore, when the film is set, the film tension mechanism is not yet operated, so that the film is set in a loose state.

Conventionally, in order to start the first film pulling by the film pulling device in the loosened state,
In some cases, the film could come off the predetermined position, which was very dangerous.

An object of the present invention is to provide an excellent film tension mechanism that reliably solves the above-mentioned problem that occurs at the time of the first operation after setting a film.

[0008]

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

A film supply mechanism 2 for drawing and supplying a film 1 having a predetermined width is provided with a film tension mechanism 3 for stretching the film 1 to a predetermined pressure, and a film drawing chuck device for chucking and pulling a drawing end 18 of the film 1. 4 is provided on the side opposite to the film supply unit 2, and a heat sealing device 5, a package storage device 6, and a cutting device 7 are provided between the film supply unit 2 and the film extraction chuck device 4. In the film tension mechanism 3, a guide roller 8 for winding and arranging the film 1 drawn out and supplied to the film supply section 2 is provided, and the guide roller 8 is movably moved by drawing out the film 1 by the film drawing chuck device 4. provided, off by the film pull-out chuck device 4 to the guide roller 8
A biasing body 9 for biasing the film 1 in the opposite direction to the pull-out movement is provided to apply tension to the film 1, and the position of the guide roller 8 at which the tension by the film 1 has an appropriate strength. Detecting device 10 for detecting
The provided, before the film引動immediately after the film 1 is disposed, before the proper position detected by the detecting device 10
The film supply roller 22 of the film supply section is driven to rotate in the reverse direction.
Further, the present invention relates to the film tension mechanism 3 in the packaging device a , wherein an automatic tension tension control unit 11 for automatically controlling the movement of the guide roller 8 is provided.

[0010]

Before the film is pulled for the first time immediately after the film 1 is disposed at the predetermined position, the guide roller 8 of the film tension mechanism 3 on which the film 1 is disposed is wound by the operation of the automatic tension controller 11. Forcibly move against the urging force of the force body 9. This guide roller 8 is a detecting device 1
It moves to the position detected by 0 and stops.

Accordingly, the urging force of the urging body 9 urged by the guide roller 8 at the stationary position is automatically applied to the film 1 after setting as tension.

Therefore, the automatic tension tension controller 11
By actuating, the film pulling can be performed in a state where the film 1 is properly tensioned from the first film pulling after the film setting.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a schematic configuration of this embodiment is shown in FIGS.
It will be described based on.

A film supply unit 2 for drawing out and supplying a film 1 having a predetermined width in a folded and overlapped state with the upper side being the opening side.
Is provided with a tension mechanism 3 for stretching the film 1 to a predetermined pressure. A film pulling chuck device 4 for chucking and pulling the drawing tip 18 of the film 1 is provided on the side opposite to the film supply unit 2. The film supply unit 2 between the film supply unit 2 and the film unloading chuck device 4
A heat sealing device 5A for vertically sealing 12 from the folded bottom portion of the film 1 to the upper opening a little before is provided near the film 1, and the upper opening of the film 1 along the vertical seal 12 sealed by the heat sealing device 5A. A cutting device 7 for cutting vertically to a position slightly short is provided. This heat sealing device 5
A and nipping rollers 19A and 19B for holding the film 1 at predetermined intervals in the pull-out transfer direction between A and the film unloading chuck device 4.
As the package storage device 6 between B, the upper opening of the film 1 is sandwiched and moved to the opposite outside, respectively.
An opening device 6 is provided for holding the open state from the superposed state. A heat sealing device 5B for horizontally sealing the upper end opening of the film 1 is provided between the draw-out movement position of the film pull-out chuck device 4 and the feed holding roller 19B on the draw-out transfer side, and is located near the feed holding roller 19B. A cutting device 16 is provided for cutting the film 1 by cutting it in a state of being connected to the cutting edge 20 by the cutting device 7. A film feeder 21 is provided at the bottom of the film 1.

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

When the film extracting chuck device 4 chucks the leading end 18 of the film 1 (the end cut by the separating and cutting device 16) located near the feed holding roller 19B on the extracting and transferring side, and pulls the film 1 to the extracting and transferring position, the tension mechanism is moved. 3, the film 1 is kept stretched at a predetermined pressure, and is pulled out from the film supply unit 2 and is continuously supplied.

This film 1 is pulled out in a folded state with its upper part being on the opening side, and is heat-sealed 5A, cutting device 7, feed holding roller 19A, package storage device (opening device) 6, feed holding roller 19B, and cut off. The leading end 18 of the drawer is chucked to the film pulling chuck device 4 via the cutting device 16 and the heat sealing device 5B.

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

Further, between the feed clamping rollers 19A and 19B,
The upper openings of the film 1 are clamped by the opening device 6 and move to the opposite outer sides, respectively, are kept in the open state from the superposed state, and are connected by the vertical seal 12 from the upper opening in the open state. Are packaged in the film 1 in a divided bag state.

Next, when the storage of the package 13 is completed, the upper opening is closed by the package storage device (opening device) 6. At this time, the storage at the position where the storage of the package 13 has already been completed and pulled out and transferred. The opening of the split bag (divided bag located between the feed clamping roller 19B and the film pulling chuck device 4) is closed by heat sealing (horizontal seal 14) by the heat sealing device 5B, and further separated by the separating and cutting device 16. The film 1 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 portion is cut to separate the film 1 (the film packaging bag 15 containing the package 13) from the subsequent one. Then, the film feeding device 21 is operated to discharge and move the separated film packaging bag 15), and the film pulling chuck device 4 returns to the rear again and draws out the tip 18 again (the cut end by the cutting device 16). To pull out and transfer the divided bag in which the package 13 has been stored.

As described above, the vertical packaging, the vertical cutting edge formation, the opening, the storage of the package, the horizontal sealing, the cutting and the cutting, and the discharge and transfer are sequentially repeated, and the film packaging bag 15 in which the package 13 is continuously sealed is automatically packaged. Is done.

Next, the film supply unit 2 which is the gist of the present invention
Will be described.

As shown in FIG. 4, the film 1 is wound around a film supply roller 22.
The structure is such that the film 1 is continuously pulled out vertically in a folded state in which the upper portion is on the opening side. Further, the drawn film 1 is arranged to be fed to the holding rollers 19A and 19B via the fixed guide roller 23A, the movable guide roller 8 and the fixed guide roller 23B. 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 member 9 for urging the guide roller 8 in a direction opposite to the pull-out movement. I have.

[0024] In this embodiment, provided with a biasing weight on the guide roller 8 via a wire as a biasing member 9, the biasing weight
Of the urging member 9 against the guide roller 8 due to the load
And a tension of a predetermined pressure is applied to the film 1.

In this embodiment, the guide roller 8 slightly lifts the urging member 9 formed of the urging weight, and the detecting device 10 for detecting the moving position of the guide roller 8 which gives the film 1 an appropriate tension. It is arranged.

The automatic tensioning controller 11 reverses the film supply roller 22 to pull back the film 1 and controls the movement of the guide roller 8.

Therefore, in this embodiment, the film 1 pulled out from the film supply roller 22 by hand is fixed to the fixed guide roller.
When the film setting is completed by arranging the guide rollers 8A, the guide rollers 8, the fixed guide rollers 23B, and the feeding and holding rollers 19A and 19B, the automatic tension tension control section 11 is operated to move the guide rollers 8 to the position of the detecting device 10 (film position). (From the position of the imaginary line shown in FIG. 4 where the tension is not applied to the position of the solid line shown in FIG. 4), the film supply roller 22 is automatically driven reversely against the urging body 9 to move the film 1 by rewinding. Thus, the film 1 is configured to automatically apply tension to the film 1 when the film is set. Therefore, the tension is applied to the film 1 appropriately from the first pulling motion, and the problem that the film 1 comes off at the first pulling due to the loosening at the time of setting the film 1 as in the related art is prevented.

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, and the urging force reducing device 24 is pulled out of the film. It is configured to operate when the chuck device 4 is pulled out. Note that the operation section of the automatic tensioning control section 11 is provided at a position indicated by reference numeral 11 in FIG.

In this embodiment, as the urging force reducing device 24, a cylinder device 25 for lifting the urging member 9 composed of the urging weight is provided, and the urging member 9 is synchronized with the drawing of the film extracting chuck device 4 . The lifting weight is lifted, and the weight of the biasing weight does not become a resistance at the time of pulling out, thereby reducing the pulling resistance of the film pulling chuck device 4.

Further, the film out detecting device 26 is used as a detecting device.
10 is provided in parallel with 10, so that the film supply roller 22 runs out of film 1 when the film is pulled, and the guide roller 8 is urged .
By detecting that the film 9 has been returned by being pulled by the urging force of the body 9, it is detected that the film has run out, and the operation of the film pulling is stopped.

[0031]

Since the present invention is constructed as described above, the automatic tensioning control unit is operated by the operation of the automatic tension tension control unit before the first film pull immediately after the film is arranged at the predetermined position.
The filter is placed at an appropriate position detected by the detection device.
The film supply roller of the
Automatically controls the movement of the idling roller , whereby tension is automatically applied to the film. Therefore, the film is always stretched with the proper tension applied to the film from the first time after the film is set. It is possible to reliably prevent the danger that the film will come off by pulling the film in a loose state as in the past, and it is possible to automatically perform tension tension after such a film setting, One step of the standby set operation step is omitted, and the film tension mechanism in the excellent packaging apparatus, which improves the operation efficiency accordingly.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of the configuration of a packaging apparatus 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 cutting the film of the packaging apparatus of the present embodiment.

FIG. 4 is an explanatory front view illustrating a tension mechanism of a film supply unit according to the embodiment.

[Explanation of symbols]

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

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B65B 11/00-11/58 B65B 41/00-41/18

Claims (1)

(57) [Claims] A film supply mechanism for drawing and feeding a film of a predetermined width is provided with a film tension mechanism for stretching the film to a predetermined pressure, and a film drawing chuck device for chucking and drawing the drawing end of the film. The film tension mechanism in a packaging device provided with a heat sealing device, a package storage device, and a cutting device between the film supply unit and the film unloading chuck device. A guide roller for winding and disposing the film to be wound, and the guide roller is movably provided by drawing out the film by the film pulling chuck device, and the film pulling chuck device is mounted on the guide roller.
A biasing body for biasing the film in the opposite direction with respect to the film withdrawal movement is provided to apply tension to the film, and the position of the guide roller at which the tension by the film has an appropriate strength is detected. Before installing the device and pulling the film immediately after disposing the film,
The fill in the proper position to be detected by the detecting device
A film tension mechanism in a packaging device , comprising: an automatic tension tension controller for automatically driving and moving the guide roller by reversely driving a film supply roller of a film supply unit .