JP2561597Y2 - Stretch film wrapper - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretch film packaging device in which a container containing food, fruits, vegetables, and the like are wrapped and adhered by a stretch film.

[0002]

2. Description of the Related Art Conventionally, fresh foods such as fruits, vegetables, and fish, or foods in containers such as lunch boxes and rice balls are sold with the outer surface wrapped in a wrapping stretch film and the bottom thereof attached. I am trying to do it.

However, when a stretch film used in this manner is attached, since a vinyl chloride film has a self-adhesive property, it can be attached to each other, and a cellophane tape can be attached. However, because there is no self-adhesion in the case of polyolefin film,
They cannot be adhered to each other, and the cellophane tape is difficult to stick, especially if it contains moisture, it cannot be stuck at all.

[0004]

SUMMARY OF THE INVENTION Therefore, a film wrapping apparatus (Japanese Utility Model Application No.
No.-87467) was devised. This film packaging device wraps food not only with polyvinyl chloride film, but also with a self-adhesive stretch film such as a polyolefin film, by using a cutter for cutting with a heat heater and a heat heater for welding the film. Even if moisture is contained on the adhesion surfaces of the films, they can adhere well, and even when wrapping using a roll-shaped wrapping stretch film, the wrapping work of this film and cutting of the required amount of film are performed. This makes it possible to easily and quickly perform the work and the work of adhering the films.

An object of the present invention is to provide a stretch film wrapping device which simplifies wrapping work and is more excellent in workability.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a stretch film packaging device according to the present invention is a stretch film package in which a long strip-shaped stretch film is rolled on a base and housed so as to be drawn out. In the container, a film cutter having a built-in heater wire is projected upwardly over substantially the entire width of the base behind a heater base provided in front of the base, and a plurality of cutters are provided on an upper surface of the heater base. A support plate is provided, at least one of the support plates is fixed, and the other is slidable in the left-right direction. Further, each support plate is provided with an elongated heater holding case in the front and rear direction. By arranging a plurality of heaters along the longitudinal direction of the heater holding case, the upper portion of these heaters is projected into a plurality of irregularities, and the rear end of the heater holding case is pressed down and moved back to the support plate. A limit switch for activating each of the heaters by pressing down the heater holding case is provided inside the heater holding case, and the temperature rise of each heater is stopped after a predetermined time. . Further, it is preferable that the support plate is entirely fixed on the upper surface of the heater base at a predetermined interval.

.. May be fixed at a predetermined interval on the heater base.

[0008]

According to the above construction, while the front end of the roll-shaped film 2 is being pulled out, the article to be packaged 10 is wrapped with the film 2 and the end faces of the film 2 are overlapped on the bottom surface, and the desired position of the film 2 is heated. The package 10 is pressed on the upper end of the cutter 4 and cut by heat. Then, while the packaged product 10 is wrapped with the film 2, the packaged product 10 is shifted onto the heater base 3,
5 are heated upward, the heaters 6, 6, ... in the heater holding cases 5, 5, ... rise in temperature, and the films 2 are partially thermally welded to each other on the bottom surface of the article to be packaged 10.

In this configuration, since the film cutting cutter 4 projects upward over substantially the entire width of the base 1, it is possible to thermally cut the band-shaped film 2 stored in the base 1 at a time in the width direction. The desired film length can be obtained quickly and easily.

Also, since at least one of the support plates 7, 7,... Is fixed on the upper surface of the heater base 3 and the other is slidable in the left-right direction, the heaters provided on the respective support plates 7, 7,. One of the holding cases 5, 5,... Is fixed, and the other is made movable in the left-right direction. The heat-sealing position of the film by the heaters 6, 6,. It can be adjusted freely according to the size of the article to be packaged 10.

Further, all of the support plates 7, 7...
It is also possible to adopt a configuration in which it is fixed on the upper surface of the heater base 3 at a predetermined interval according to the size of 0. Moreover, each
A plurality of heaters 6 arranged in the heater holding case 5
Since these heaters 6, 6,...
By pressing the bottom surface of the article to be packaged 10 against the upper surface of the package , it is possible to perform partially concentrated heat welding, which is different from full-surface heat welding, in a short time.

Further, the heating timing of each of the heaters 6, 6,... Is activated by a pressing operation of the heater plate 5,
Since the operation is automatically stopped after a predetermined time, an extremely simple heat welding operation in which the operator only needs to press the switch is sufficient, and at the same time, overheating of the heaters 6, 6,... Can be prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall perspective view of a stretch film packaging device according to the present invention. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a bottom view of the article to be packaged, and shows a state in which the article to be packaged is packaged and thermally welded using the film packaging apparatus of the present invention.

1 and 2, behind the base 1, two film loading rollers 9, 9 are arranged side by side at predetermined intervals in the front-back direction across the width of the base 1. A roll 12 of the long strip film 2 is stretched between the rollers 9 and 9. Therefore, the roll 12 can freely rotate on the rollers 9, 9, and the end of the film 2 can be pulled out freely.

In front of the roll 12, a side plate 1 of the base 1 is provided.
A work table 13 whose front part can be opened and closed upward is provided around support shafts 13a provided on a and 1a. At the front end of the work table 13, L-shaped locking pieces 14 are respectively provided on both side plates 1a and 1a, and the top piece 14a is locked to the front edge of the work table 13 in a closed state. The lower end of the stopper 14 is locked by pulling the lower end of the stopper 14 with a coil spring 14 d, and the upper table 14 a is separated from the front edge of the upper table 13 so that the upper table 13 can be raised and opened. further,
The work table 13 has a support piece 15 fixed at both ends of its front edge.
a, 15a are extended forward, and these support shaft pieces 15a, 15a
A rear roller 15 is stretched across the entire width of the worktable 13 therebetween. Immediately before the work table 13, both side plates 1 of the base 1
a, a front roller 16 is suspended between upper pieces of support shaft pieces 16a, 16a provided inside the support shaft pieces 1a, 1a.
6a is a coil spring 16 for each side plate 1a, 1a.
b and 16b are stretched backward. As a result, the front roller 16 is pressed against the rear roller 15 by closing the work table 13, and the interval between the front roller 16 and the rear roller 15 is increased by opening the work table 13.

With this configuration, the work table 13 is opened, the film 2 drawn from the roll 12 is drawn out from between the front and rear rollers 15 and 16 under the work table 13, and then the work table 13 is closed. Film 2
Is sandwiched between the front and rear rollers 15 and 16.

The bent plate 17 is provided along the entire width of the front roller 16, is made of a stainless steel plate, and has both ends fixed to both support shaft pieces 16a, 16a of the base 1, respectively. And is bent so as to form a flat surface 17a further forward. Thereby, the bent plate 1
7 serves as a waiter for the front roller 16 without bending. That is, when the film 2 sandwiched between the front and rear rollers 15 and 16 is pulled out forward (indicated by a two-dot chain line in FIG. 2) while the work table 13 is kept closed, the folding plate 17 is pulled out.
Serves as a waiter for urging the front roller 16 forward, whereby the front roller 16 is easily separated from the rear roller 15 against the tensile force of the coil spring 16b, and the film 2 can be pulled out without difficulty. . In addition, the bent plate 17
After the film 2 is cut by the cutter 4 described later, the flat surface 17a of the
The cut end surface of the film 2 adheres to a, and the leading end of the film 2 is easily taken out in the next operation.

An inclined plate 19 is fixedly provided over the entire width between the side plates 1a and 1a of the base 1 in the vicinity of the front edge of the bent plate 17, and is located in front of the inclined plate 19 as a boundary. The rectangular heater base 3 is formed flat.

Above the inclined plate 19, the cutter 4 is fixedly provided between the side plates 1a, 1a. This cutter 4
The upper edge of the metal plate is bent to accommodate a nichrome wire (not shown), and the upper end protrudes slightly above the uppermost surface of the bent plate 17. The protection plate 19a is attached to the front side surface of the cutter 4 by bending. However, the lower part of the inclined plate 19 is opened and separated from the heater base 3.

The heater base 3 has a locking edge 3a bent at an acute angle downward along the front edge, and the rear edge is simply cut. On such a heater base 3, two support plates 7 are placed on the upper surface of the heater base 3 over the front-rear width of the heater base 3,
Along the front and rear edges of the support plate 7, bent pieces 7a and 7b are formed in a downwardly acute angle, and the respective bent pieces 7a and 7b are formed.
Is fixed to the front and rear edges of the heater base 3 so that the support plate 7
Are slidable in the left and right directions of the heater base 3.

However, for example, the left support plate 7 is fixed to the left side of the heater base 3 by screws, and the right support plate 7 is fixed.
May be adjusted as the sliding structure as described above to adjust the distance between the two support plates 7. .. May be fixed to the upper surface of the heater base 3 with screws at predetermined intervals in accordance with the size of the article 10 to be packaged. By doing so, the heater holding cases 5 and 5 are adjusted at a predetermined interval, which is convenient for packaging and welding of a fixed-form packaged article.

On each of the upper surfaces of the support plates 7, 7, two rectangular heater holding cases 5, 5 are provided, and along the longitudinal direction of each of the heater holding cases 5, 5, a plurality of built-in nichrome wires are provided. Long heaters 6, 3... (Three in FIG. 1) protrude upward. The cross-sectional shape of each heater 6 is, for example,
A plurality of such heaters 6 are arranged.
As a result, the upper surface forms a plurality of wavy irregularities.
As a result, the envelope pressed against the upper surfaces of these heaters 6, 6,.
Partially concentrated heat welding is possible on the bottom of equipment 10
It is assumed that . However, the number of heater holding cases 5, that is, the number of support plates 7 and the number of heaters 6 provided in one heater holding case 5 are not limited to the above numbers. And the degree of thermal welding. In addition, the individual heaters 6
The cross-sectional shape does not have to be circular.
As long as the arrangement results in a top surface with multiple irregularities
No.

Of the heater holding cases 5, 5, for example, the rear end of the heater holding case 5 on the right side is
Are supported by a shaft 5a so as to be able to swing freely, and can be elastically restored by interposing a spring, and the heaters 6, 6,.
And a limit switch (not shown) for stopping the temperature rise after a predetermined time is provided, and a timer for stopping the temperature rise after a predetermined time after the start of the limit switch is provided. Such a swing structure of the heater holding cases 5 and 5 and a starting structure of the heater 6 may be configured for all the heater holding cases 5 and 5, but as described above, the right heater holding case 5 Even if it is constituted only, its function can be sufficiently achieved.

With this structure, when the heaters 6, 6,... Are depressed from above, the heater holding case 5 swings to start the temperature rise of the heaters 6, 6,. It can be controlled to stop the temperature rise.

The nichrome wire incorporated in the cutter 4 and the limit switch in the heater holding case 5 are connected to the controller C so as to control the temperature and the startup. Although a power switch, a pilot lamp, and a timer for designating a time from when the temperature of the heater rises to when the heater stops are not shown, they may be provided on the inclined plate 19, for example.

In order to package the article to be packaged 10 with the film 2 using the film packaging apparatus configured as described above,
The temperature of the cutter 4 is raised, the article to be packaged 10 is placed on the worktable 13, the tip of the film 2 pulled out from between the front and rear rollers 15 and 16 is stretched on the worktable 13, and the tip of the film 2 is moved to the worktable 13. When the packaged article 10 is pulled out together with the film 2 in a state in which the bottom face of the packaged article 10 is covered with a margin, the film 2 covers the bottom face of the packaged article 10. Then, the article to be packaged 10 is pulled forward to the position where it overlaps, the film 2 is pulled out, and the film 2 is cut at an appropriate position with the cutter 4 to be thermally cut.

Next, the ends of the film left on the left and right sides of the article to be packaged 10 are turned to the bottom surface of the article to be packaged 10 so that the left, right, front and rear ends of the film 2 are as shown in FIG. 1
So that they overlap at the bottom of 0.

Then, the bottom surface of the article to be packaged 10 is
When pressed against the upper heaters 6, 6,..., As shown in FIG. This heat welding is for intensively performing the partial heat welding of the heaters 6, 6,..., And enables the heat welding of the film 2 in a short time, which was impossible with the entire surface welding.

In the above description, the method of packaging rectangular articles has been described. However, the present invention can be similarly applied to the case where the articles to be packaged are square, and the same applies to spherical articles such as fruits and vegetables. Can be packaged.

Further, according to the experimental results, even when moisture is contained in the bottom surface of the packaged product, that is, even when moisture is contained in the portion where the film is stuck, it can be satisfactorily heat-sealed without any influence. That has been confirmed.

[0032]

As described above, in the stretch film packaging device of the present invention, a film wrapped around an article to be packaged and superimposed on the bottom surface is formed by a heater having a plurality of irregularities on the upper surface. Unlike general heat welding, it is possible to perform heat welding of the required minimum area within a short time, and not only can all vinyl films be stuck, but also polyolefin without self-adhesion Of course, even a film or the like can be adhered well.
Therefore, even if water is contained on the film-attached surface, the film can be stuck without being affected by the moisture, so that the water-based food can be satisfactorily stuck especially when the food is wrapped in a film.

In particular, in the present invention, one of the heater holding cases 5, 5,... On the upper surface of the heater base 3 is fixed, and the installation width of the other heater holding cases 5 can be easily adjusted. .. Can be fixed at predetermined intervals according to the size of the article to be packaged in advance, which is convenient for packaging and welding work of the article to be packaged in a fixed shape. Becomes

In addition, since it is possible to adhere without being affected by moisture even on the surface to be adhered, it is possible to adhere well, especially when a water-based food product is wrapped in a film. it can.

Further, since the cutter 4 and the heaters 6, 6,... Are sequentially arranged from the rear to the front, the cutting operation and the sticking operation of the film can be performed quickly by a continuous operation. The properties are extremely good.

Further, since the start and stop of the heater are controlled automatically, overheating of the heater is prevented,
Deterioration of the contents of the packaged product, for example, a change in the color of the outer skin of fruits and vegetables can be prevented.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a stretch film packaging device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a bottom view of the article to be packaged, and shows a state in which the article to be packaged is packaged and thermally welded using the film packaging apparatus of the present invention.

[Description of sign]

DESCRIPTION OF SYMBOLS 1 ... Base, 1a ... Base side, 2 ... Film, 3 ... Heater base, 4 ... Cutter, 5 ... Heater holding case, 6 ... Heater, 7 ... Support plate, 9 ... Film loading roller, 10 ... Packaged product, 12: roll film, 15: rear roller,
16: front roller, 17: bent piece.

Claims (2)

(57) [Scope of request for utility model registration] 1. A stretch film packaging device in which a long strip-shaped stretch film is housed in a base so as to be drawn out in a roll, wherein a film having a built-in heater wire behind a heater base provided in front of said base. A cutting cutter protrudes upward over substantially the entire width of the base, a plurality of support plates are provided on the upper surface of the heater base, and at least one of the support plates is fixed to the base, The other is slidable in the left and right direction, and furthermore, a long heater holding case is attached to each support plate in the front and back, and a plurality of heaters are arranged along the longitudinal direction of each heater holding case. The upper portion of these heaters is projected into a plurality of irregularities, and the rear end of the heater holding case is pivotally mounted on the support plate so as to be able to be pressed down and returned, and the heater holding case is provided inside the heater holding case. Downward movement limit switch for starting the respective heater is provided by stretching, wherein the it has to stop the Atsushi Nobori of the heater after a predetermined time
Film wrapper . 2. The stretch film packaging device according to claim 1, wherein the support plate is fixed to the upper surface of the heater base at a predetermined interval.