JPH1111403A - Packaging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for automatically manufacturing a packaged body in which a film is bonded to the inner surface of a paper tray and the top opening of the paper tray is closed. SOLUTION: A paper tray 14 is manufactured by feeding a sheet piece 11 into a form 12, which tray 14 is supplied into a lower side box 15 to transport it. A lower side film 18 is placed over the tray 14 being transported, and at a molding device 21, the film 18 is sucked, by vacuum suction, from the side of the tray 14 under conditions of heating to thermally adhere the film 18 integrally to the inner surface of the tray 14, the film 18 being in conformity with the inner surface. And after an object to be packaged is put into the tray 14, the upper side of the film 18 is covered with an upper side film 24 and an overlapping part between the film 18 and the film 24 is heat sealed by a seal device 25 and further the overlapping part is cut off by a horizontal cut device 26 and a vertical cut device 21 to manufacture packaged bodies 30 separately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging method, and more specifically, to a new packaging method capable of exhibiting strength and water resistance by bonding a film to an inner surface of a paper tray. The present invention relates to a method for automatically manufacturing a package having various packaging forms.

[0002]

BACKGROUND OF THE INVENTION There are a wide variety of packaging forms, and an appropriate form is determined according to the type and content of an article to be packaged. For example, when the article to be packaged contains a liquid or the like and is required to have water resistance, and when it has a certain weight, strength is also required. In such a case, a relatively thick film material such as PVC is used as the packaging material, and deep drawing packaging is often performed.

[0003] However, in the case of the above-mentioned plastic film such as polyvinyl chloride, it is convenient to pay attention only to easy processing and production of the package. After the package is opened and the packaged object is taken out, it is discarded as garbage. Therefore, in consideration of such disposal, it is preferable that the above-mentioned non-combustible PVC or the like is not used as much as possible, or that even if it is used, the use amount is suppressed.

[0004] On the other hand, there is a paper container, but there is a problem in terms of water resistance. Further, a paper container obtained by laminating the surface thereof also has a problem in terms of sealing properties with the film covering the opening.

[0005] The inventor of the present invention has conceived a new type of package as shown in FIG. That is, the lower film 2 is bonded to and integrated with the surface of the paper tray 1 having an upper opening. Thereby, the water resistance can be exhibited by the lower film 2 and the strength can be exhibited by the paper tray 1, so that a thin and weak film can be used. Then, the upper film 3 is heat-sealed so as to cover the opening. The seal at this time is
Since the two films 2 and 3 are provided with each other, the sealing strength can be made sufficient and the airtightness can be maintained. In addition, the sealing between the films can be performed easily and reliably compared to the bonding with the paper.

[0006] The object of the present invention is to solve the above-described problem with FIG.
And similar forms, saving resources and
An object of the present invention is to provide a packaging method capable of automatically and continuously producing a package satisfying at least one of the easiness of disposal.

[0007]

In order to achieve the above-mentioned object, in a packaging method according to the present invention, a paper tray is transported, a lower film is covered from above the tray being transported, and a heating atmosphere is applied. By sucking the lower film from the tray side underneath, the lower film is thermally bonded and integrated in a state corresponding to the inner surface of the tray, and after the articles to be packaged are supplied in the tray, the lower film is The upper portion of the film was covered with an upper film, and the polymerized portions of both films were heat-sealed, and then the heat-sealed polymerized portion was cut and separated into individual packages (Claim 1).

Another solution is to transport a paper tray, cover the lower film from above the tray in the middle of the transport, and suction the lower film from the tray side in a heated atmosphere. The lower film is heat-bonded and integrated with the inner surface of the tray so as to match the inner surface of the tray, and after the articles to be packaged are supplied into the tray, the lower film has a predetermined shape with respect to the upper edge of at least one of the lower film and the tray. The opening of the tray may be closed by fitting a lid (claim 2).

In such a case, the lid may be manufactured by molding a film that is continuously pulled out, and may be fitted into the lower film and the tray.

On the premise of the above two inventions,
The tray may be configured to supply a tray having a predetermined shape manufactured by molding a flat sheet piece to a transport path (claim 4).

* Definition of terms A tray as used in the present invention is a dish-shaped container having a side wall formed upright around a bottom surface, and the angle of the side wall is arbitrary (cut perpendicular to the bottom surface). Objects and those inclined at a predetermined angle). Further, the concept includes a partially perforated state in which a through hole is formed in a part of the bottom surface or the side wall.

[0012]

FIG. 2 shows a schematic configuration of an apparatus for carrying out a preferred embodiment corresponding to the first invention (the invention described in claim 1) of the packaging method according to the present invention. Shows. And in this Embodiment, it is for manufacturing the package of a form as shown in FIG. Hereinafter, an embodiment of the method will be described while explaining the configuration of the apparatus.

First, a large number of paper sheets 11 constituting a tray are stored in a stacker 10 in a state of being stacked. Then, the sheets are sequentially taken out one by one from the front end (lower end) and moved to the tray forming position A. At this tray molding position A, a mold frame 12 that is opened up and down is arranged.
The sheet piece 11 is placed above the formwork 12.

The inner surface 12a of the mold 12 is substantially identical to the outer shape of the tray, and the presser 13 is installed above the mold 12 so as to be vertically movable.
1 is pushed into the mold 12 and dropped and discharged from the lower opening. The sheet piece 11 is molded along the shape of its inner surface 12a while passing through the mold frame 12, and its peripheral edge is raised to form the tray 14. Then, the dropped / discharged tray 14 is supplied and stored in the concave portion 15a of the lower box 15 located below the tray forming position A. That is, in the steps so far, a tray having a predetermined shape manufactured by molding a flat sheet piece of paper is supplied to the transport path.

A plurality of lower boxes 15 are prepared as shown in the figure, and are moved back and forth along the transport direction, and are moved forward by a predetermined distance (in the example shown, five lower boxes 15). Then, after moving downward as it is, it returns to the original tray molding position A. Then, the tray 14 is moved upward.
You will receive In other words, this lower box 15
Has a function as a conveying means of the molded tray 14.

As described above, the trays 14 are sequentially conveyed at predetermined intervals by the lower box 15, and the lower film 18 continuously drawn from the raw roll 17 during the conveyance is moved above the tray 14. It is covered. The lower film 18 is moved forward by following the rotational movement of the endless chain 19a by gripping both edges of the lower film 18 by the holding claws attached to the endless chain 19a constituting the transport device 19. . Further, the endless chain 19a meshes with the sprocket 19b and rotates by the rotational force received from the sprocket 19b. The transport between the transport device 19 and the lower block 15 is synchronized, transported at the same speed, and temporarily stopped at the same timing.

Further, an upper box 20 is disposed forward of the position B where the lower film 18 is mounted in the transport direction. The upper box 20 and the lower box 15 facing the upper box 20 form a molding apparatus 21. Is configured.
The molding device 21 has the same configuration as a molding device used in a deep drawing type packaging device and the like, and evacuates while heating the inside of the box. Thereby, the lower film 18
Is sucked into the concave portion 15a of the lower box 15 to form a downwardly convex pocket portion. At this time, in this embodiment, since the tray 14 already exists in the lower box 15, the lower film 18 swelling downward is placed in the tray 1.
4 and closely adhere to each other. Since the lower film 18 is heated at the same time, the lower film 18 softened by the heat is heat-bonded in a state in which the lower film 18 is in close contact with the tray 14 to be integrated. As described above, the lower box 15 in this embodiment, together with the transfer function of the tray 14, sucks the lower film from the tray side in a heated atmosphere and thermally bonds the lower film to the inner surface of the tray. And has a function as a part of a molding device for integrating the components.

When the lower box 15 moves to a predetermined position in front of the molding device 21 in the traveling direction, the lower box 15
Descends and moves backward. At this time, since the tray 14 and the lower film 18 are integrated by passing through the molding box 21, the tray 14 is transported together with the lower film 18. Then, the article to be packaged is supplied into the tray 14 in a predetermined supply area C during the conveyance. This supply may be automatic supply by a supply device,
Manual supply by hand may be used.

At a predetermined position ahead of the supply area C in the traveling direction, there is a supply position D for the upper film. That is, the upper film 24 continuously drawn from the raw material roll 23
Is led to a feed position D where the lower film 1
8. It is covered above the tray 14. Then, the overlapping portion of both films 18 and 24 is heat-sealed by a sealing device 25 disposed in front of the supply position D, and the heat-sealed overlapping portion is then removed by a horizontal cutting device 26 and a vertical cutting device 27. By cutting and separating sequentially,
Individual packages 30 are manufactured and carried out. If the sealing device 25 is replaced with a vacuum chamber, a vacuum package can be manufactured, and such a method is also included in the present invention.

FIG. 3 shows a second invention of the present invention.
3 shows a schematic configuration of an apparatus for carrying out an embodiment corresponding to (invention 3). And in this Embodiment, it is for manufacturing the package of a form as shown in FIG. Hereinafter, an embodiment of the method will be described while explaining the configuration of the apparatus.

As is apparent from a comparison between FIG. 3 and FIG.
Many configurations are common. The same members are denoted by the same reference numerals. That is, the steps up to the point where the packaged object is supplied into the tray 14 in the supply area C are the same as those in the above-described embodiment, and the description thereof is omitted. In addition, as described later, the tray 14,
Since the shape of the lower film 18 is partially changed, the shape of the inner surface 12a of the mold 12 is different from that shown in FIG.

As shown in FIG. 4, in this embodiment, the package is manufactured by fitting the lid 4 into the upper opening of the tray 1 and the lower film 2. First, the shape of the package to be manufactured will be described.
This is the same as the above in that the lower film 2 is thermally bonded to the inner surface. However, the ribs are formed by bending the tip 2b of the flat portion 2a protruding from the outer peripheral edge of the lower film 2 further downward due to the attachment of the lid 4. Further, the middle portion in the height direction of the tip 2b is depressed inward. Further, beams 2c and 1a projecting outward are formed above the side wall surfaces of the tray 1 and the lower film 2. With such a shape, even the relatively thin lower film 2 has a strength that can withstand fitting with the lid 4. If the strength is not enough even with such a shape, the thickness may be slightly increased, or a film having high strength may be used. Even in such a case, the thickness and strength of the film can be reduced as compared with a conventional case where the package is manufactured and configured only with PVC or the like, so that the effect of reducing the amount of film used is exhibited. The lid 4 has a rib 4a protruding upward in the vicinity of the outer periphery, and has an outer peripheral edge 4b.
Has a shape folded downward, and fits with the rib of the lower film 2 as shown.

In order to manufacture a package having the above-described structure, if an article to be packaged is supplied into the tray 1 in the supply area C, the material roll 31 is disposed in front of the tray 1 in the traveling direction.
Of the film 32 continuously drawn out of the tray is molded into a lid member 34 having a predetermined shape by a molding device 33 arranged in the middle of the drawing, and the lid member 34 is attached to the tray 14 at the lid mounting portion E, and the lower side. The film 18 is attached. By sequentially cutting and separating predetermined positions of the films 18 and 32 by a horizontal cutting device and a vertical cutting device (not shown) arranged in front of the lid mounting portion E, individual packages are manufactured,
It is carried out.

In the lid mounting step in the lid mounting section E, for example, the lid 34 is hooked on the front end of the tray and the lower film, and then the upper side of the lid 34 is moved to the tray side by a roller or other pressing means. It can be performed using a known device such as fitting by biasing. Further, the film 32 is processed into a shape of the lid 4 as shown in FIG.

FIG. 5 shows an apparatus for realizing another method for manufacturing a package of the type shown in FIG. The basic configuration is the same as that shown in FIG. 3. Only the differences will be described. In this embodiment, a large number of lids 4 that have been processed into a predetermined shape in advance are prepared, and a package is manufactured using the lids 4. I have to. That is, many lids 4 are stored in the stocker 35 in a stacked manner. Then, a transfer device 36 is arranged below the stocker 35. Then, the lower film 18 and the tray 14 pass through the supply area C and are integrated with each other, and are positioned below the stocker 35 in a state where the articles to be packaged are stored. Then, the transfer device removes one lid 4 at the lower end and covers it over the tray 14. At this time, the fitting has not been performed yet. Next, when the vehicle advances in that state, the lid is urged downward from above the lid 4 by the lid mounting portion E,
The lower film 18 is fitted. This completes the lid mounting process. Thereafter, a predetermined position of the lower film 18 is cut and separated by a cutting device (not shown), and the package body is manufactured. The transfer device 3
6 can be realized by using various conventional apparatuses such as a vacuum type.

In each of the above-described embodiments, the tray is manufactured by processing the sheet pieces 11 during a series of manufacturing and packaging steps. However, the present invention is not limited to this. May be prepared and supplied to the transport path (in the lower box in the illustrated example), and various modifications are possible. Further, it goes without saying that the specific device configuration for implementing the present invention is not limited to the above.

[0027]

As described above, in the packaging method according to the present invention, a film having a form in which the film is adhered to the inner surface of the paper tray and the upper opening thereof is closed is continuously provided. Can be manufactured automatically. And the package manufactured in this manner is a tough, relatively heavy, relatively heavy weight package while minimizing the amount of film used as incombustible material and saving resources. It can be stored even if it is present, it can also exhibit water resistance, and can be easily disposed of (especially if the film and tray can be separated), and it is naturally friendly and can be recycled. Become.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a package manufactured according to the present invention.

FIG. 2 is a diagram showing an example of an apparatus for implementing the first invention.

FIG. 3 is a diagram showing an example of an apparatus for implementing the second invention.

FIG. 4 is a view showing an example of a package manufactured using the apparatus of FIG. 3;

FIG. 5 is a diagram showing another example of an apparatus for carrying out the second invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Tray 2 Lower film 3 Upper film 4 Lid 11 Sheet piece 18 Lower film 21 Forming device (for bonding tray and lower film) 24 Upper film 33 Forming device (for lid forming)

Claims (4)

[Claims] 1. A paper tray is conveyed, a lower film is covered from above the tray in the middle of the conveyance, and the lower film is sucked from the tray side in a heating atmosphere to thereby lower the lower film. After supplying the article to be packaged into the tray, the upper part of the lower film is covered with an upper film, and the overlapped portion of both films is heat-sealed. A packaging method characterized in that the heat-sealed polymerized portion is cut and separated into individual packages. 2. A paper tray is conveyed, a lower film is covered from above the tray in the middle of the conveyance, and the lower film is sucked from the tray side in a heating atmosphere to thereby lower the lower film. After being heat-bonded and integrated with the inner surface of the tray, the packaged material is supplied into the tray, and then the lower film,
A packaging method, wherein an opening of the tray is closed by fitting a lid having a predetermined shape into at least one upper edge of the tray. 3. The packaging method according to claim 2, wherein said lid is manufactured by molding a film that is continuously pulled out, and is fitted into said lower film and a tray. . 4. The tray according to claim 1, wherein a tray having a predetermined shape manufactured by molding a flat sheet piece is supplied to a conveyance path.
The packaging method described in the item.