JPH11105858A - Paper box for packing and packing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pack articles in a casing without the need for the filling of cushioning materials by employing a heat-shrinkable film and fixing the articles inside the casing with the film. SOLUTION: This paper box comprises a casing 1 made of paper, having an ordinary structure, and a releasable, heat-shrinkable film 3 lined over the entire inner faces of side walls 6 and upper and lower flaps 7, 8 of the casing 1. Adhesion of the film 3 is limited to the upper and lower flaps 7, 8 only. The film 3 is allowed to adhere partly to the upper flaps 7 and extensively to the lower flaps 8, respectively. Thus, the film 3 is constituted in such a way that it is released from the upper flaps 7 to heat-shrinkably wrap articles 13 in the casing 1 at the time of packing and that it is released even from the lower flaps 8 to be separable from the casing 1 at the time of making the film 3 to waste.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing paper box and a packing method in which a heat-shrinkable film is provided in a paper box made of cardboard or the like so that articles can be packed without a cushioning material. It is.

[0002]

A packing method which eliminates the need to fill a space around an article by tightly packing the article in a box by utilizing heat shrinkage by a heat-shrinkable film. Has already been implemented in some areas.

In this conventional packing method, a single film is inserted into a box at the time of packing, and a large number of picked articles are arranged on the film and stored in the box. In this state, the film is heated and shrunk by passing through a shrink tunnel, and the article is tightly fixed in the box body by the shrinkage of the film.

In such a conventional method, since the film is inserted at the time of packing, it is troublesome, and at the time of taking out the film, the heat shrunk film is forcibly peeled off.
Alternatively, since it has to be cut open, there is a troublesome problem as compared with a normal package that can be taken out only by opening the upper lid.

[0005] Further, since the upper flap at the time of packing is open in all directions, it may hinder the storage of articles, and when passing through a shrink tunnel, a guide member is provided to fold the upper flaps on both sides downward. If the processing of the upper flap is troublesome, a box body without the upper flap is adopted, and after passing through the tunnel, a separately prepared lid box is covered to complete the packing.

The present invention has been conceived in order to solve the above-mentioned conventional problems, and has as its object to eliminate the trouble of inserting a film at the time of packing and taking out an article, and at the time of storing an article and passing through a shrink tunnel. An object of the present invention is to provide a new packing paper box and a packing method that can solve the problem of the upper flap at the time.

[0007]

SUMMARY OF THE INVENTION One of the above objects of the present invention is to provide a box having a normal structure assembled and formed from a paperboard such as corrugated cardboard, and to cover the entire side wall of the box and the inside of the upper and lower flaps. It consists of a film for heat-shrinkable packaging that is lined and peelable, and limits the adhesion of the film to only the upper and lower flaps, and partially adheres to the upper flap and adheres completely to the lower flap, respectively. When packing the film, it is peeled off from the upper flap to heat shrink wrap the articles in the box, and when discarded, it is peeled off from the lower flap to form a packing paper box that can be separated from the box.

The upper and lower flaps provided with folding lines at the top and bottom of each side wall of the box body are composed of an inner flap and an outer flap butt, and the inner flap and the outer flap of the upper flap are paired with the outer flap. The ends are partially connected, and are formed so as to be foldable as one flap from the fold line to both outer side surfaces of the side wall when the box body is flat, and bent from the connection part when the box body is formed by expanding the side wall. The film is bonded along the outer surface of the side wall, and the film is adhered to one entire surface of the paperboard before blank forming of the box body. It is also stamped and lined over the entire inner surface of the side wall and upper and lower flaps.

Another aspect of the present invention is a box having a normal structure assembled from cardboard or other paperboard, and a peelable heat lined over the entire side wall of the box and the inside of the upper and lower flaps. It consists of a film for shrink wrapping,
After limiting the film to only the upper and lower flaps, use a packing paper box that is partially adhered to the upper flap and fully adhered to the lower flap, and the required number of articles are stored in the box. Then, peel off the film from the upper flap, cover it over the article from the side and wrap it, then heat shrink the film to tighten the article and fix it to the bottom of the box, and then close the upper flap to complete the packing The heat shrinkage of the film is performed by passing the box through a shrink tunnel. In addition, it is also possible to take out the article tightly fixed in the box by opening the box with the bottom of the box facing upward and opening the lower flap constituting the bottom.

[0010] In the packing paper box having the above structure, since the heat-shrinkable film is lined inside the box before packing, it is not necessary to insert the film at the time of packing. Since the upper flap is folded back along the outer surface of the side wall due to the partial connection between the inner flap and the outer flap, the problems caused by the upper flap during the transfer process are solved. When the upper lid is formed by the upper flap, the inner and outer flaps constrained to each other are free only by cutting off the connected outer end, and the individual flaps can be folded back one by one. Does not require

Also, since the film is adhered to the lower flap with a pressure-sensitive adhesive which can be peeled in advance, the film can be easily peeled off from the lower flap only by strongly pulling the film. Because it can be disposed of, it can be useful for reuse.

In the above packing method, heat shrinkage is not performed up to the portion adhered to the lower flap of the film, and the film remains as it is. Therefore, if the box is turned upside down and the bottom is opened, an article appears. There is no need to remove the article by peeling it off or tearing it off, and the packaged article can be easily taken out in the same manner as in a normal case.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a blank of a packing paper box. A packing film 3 is coated on one side of a rectangular corrugated paper 2 as a material of a box 1 before forming a blank. Is adhered so that it can be peeled off, leaving it at the end. The film 3 is a uniaxially or biaxially stretched plastic heat-shrinkable film having a thickness of 50 to 100 micrometers (μm). As the adhesive layer 5, a commercially available pressure-sensitive adhesive is used.

The film 3 is used for forming the upper and lower flaps 7, 8 of the four side walls 6, 6 by punching.
And is lined over the entire inner surface of the side walls 6, 6 and the upper and lower flaps 7, 8. The bonding is limited to the upper and lower flaps 7 and 8 only, the portions facing the side walls 6 and 6 are not bonded, and the upper flap 7 is partially bonded in a linear or dot-like manner. Are completely adhered to each other.

The upper and lower flaps 7, 8 are connected to the respective side walls 6, 6
Are provided successively with folding lines 9 and 10 above and below, and these flaps are composed of inner flaps 7a and 8a and butted outer flaps 7b and 8b. Further, the inner flap 7a and the outer flap 7b of the upper flap 7 are partially connected to the outer end 7c one by one, so that when the box is flat, the side walls 6,
The outer side surface of each of the flaps 6 can be folded back as one flap.

In the illustrated example, when the connecting pieces 11 are bonded to the glue margin 4 to connect the side walls 6 and 6, the upper pieces 11 of the connecting pieces 11 are connected.
a forms the end of the inner flap 7a, so that the upper piece 11a
The end adjacent to the outer flap 7b as the outer end 7c
Although it is partially connected to the outer flap 7b, the connection portion is not particularly limited to this position since it may be located at the opposite corner of the assembled box body 1.

In order to assemble the packing paper box from the blank shown in FIG.
Is folded inward, and the connecting piece 11 is folded back and adhered to the glue margin 4 at the blank end to form four side walls 6, 6.
Are connected endlessly. Next, as shown in FIG. 3, the upper flaps 7 divided on both sides in a flat state are folded back as one flap from the fold line 9 to the outside of the side wall, and the side walls 6, 6 are expanded. When the quadrilateral box body peripheral side is formed, as shown in FIG. 4, the upper flap 7 is also bent from the outer end 7c where the inner flap 7a and the outer flap 7b are connected to each other. The film 3 is located along the outer side surface, and the film 3 lined with the upper flap 7 is exposed to the outside.

After forming the peripheral side of the box body by expanding the side walls 6, 6, the lower flap 8 is folded inward from the inner flap 8a in order, and the outer flap 8b, which is overlapped and folded on the lower flap 8, is attached to the butted portion. The box 1 is completed by taping with an adhesive tape 12 (see FIG. 5).

Each figure in FIG. 5 sequentially shows a process of packing a large number of articles 13 in the paper box in which the film 3 is lined in the box 1, and the picked articles 13 are put in the box (FIG. A). ). Next, the film 3 is peeled off from the upper flap 7 and wrapped around the article 13 from all sides (FIG. B).
At this time, the film 3 is also connected in the same manner as the inner and outer flaps. However, as shown in FIG. 7, if the film 3 is peeled off without being cut off and folded inward, it is covered alternately from two directions, and from the bottom periphery. The article 13 is wrapped in a bag shape.

After wrapping the article 13 with the film 3,
When the box 1 is passed through the shrink tunnel,
The film 3 is heated and shrunk by hot air blown only from the top down, thereby tightening the article 13 and fixing it to the bottom of the box, so that the article 13 does not move even if the box 1 is shaken (FIG. C). . At this time, since the upper flap 7 is folded back along the side wall, it does not obstruct the passage through the tunnel, and the upper flap 7 does not need to be folded down by a guide member or the like.

Since the article 13 is wrapped and fixed in the box only by passing through the shrink tunnel in this manner, the upper flap 7 is then folded inward from the inner flap 7a in order, and the outer flap 7 is then folded over. The butted portion of the flap 7b is closed by taping with an adhesive tape 14 (FIG. D). When the upper lid is formed by the upper flap 7, the outer flap 7c connecting the inner flap 7a and the outer flap 7b is cut so that the flaps constrained to each other are in a free state, and individual folding can be easily performed. (See FIG. 8).

In such a package, the stored articles 13
A space 15 is formed around the space 13, but the article 13 is wrapped with the heat-shrinkable film 3 and is fixed to the bottom of the box in a tightened state. It is not necessary to perform the operation, but rather, the impact from the outside is cut off by the space portion 13, so that the buffering effect becomes remarkable.

When the article 13 is taken out of the box body, the box body 1 is turned upside down and the bottom portion is set to the upper side.
Is peeled off and the lower flap 8 is opened in all directions, since the film 3 remains adhered to the lower flap 8, it is removed together with the lower flap 8 from the bottom surface of the article 13, and the inside of the box is opened.
The removal of the article 13 becomes possible. Therefore, it takes less time and effort than the case where the heat-shrinkable film 3 is taken out by separating or opening the film 3 (FIGS. 6 and 9).
reference).

When the film 3 becomes an obstacle or is discarded when the paper box used for packing is reused for another use, a pressure-sensitive adhesive which can be peeled off in advance as an adhesive for the film 3 is used. , The film 3 can be easily peeled off from the lower flap 8 only by strongly pulling the film 3. In case of disposal, it can be sorted into corrugated paper and plastic film and disposed, so that it is easy to treat.

In the above embodiment, the inner flap 7a and the outer flap 7b are connected at the outer end 7c so that the upper flap 7 can be turned outside the side wall. However, it is not always necessary to connect them. Each flap of the lower flap 8 is not limited to the one shown in the drawing but may be of the overlapping type or the biting type. Furthermore, a shrink tunnel is employed for the heat shrinkage of the film 3, but since the heat shrinkage can be performed simply with an electric heating device, a dryer, or the like, the heat shrinking means is not limited to the shrink tunnel.

[Brief description of the drawings]

FIG. 1 is a development view of a packing paper box according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a plan view in a flat state during assembly.

FIG. 4 is a perspective view when assembly is completed.

FIG. 5 is an explanatory view showing the packing state of articles in order.

FIG. 6 is an explanatory diagram showing a state in which a packed article is taken out.

FIG. 7 is a perspective view when the film is peeled from the upper flap.

FIG. 8 is a perspective view showing an article packaging state by heat shrinkage of a film and a state before an upper lid is formed by an upper flap.

FIG. 9 is a perspective view showing a state in which the packed articles are taken out.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 2 Corrugated paper 3 Film 5 Adhesive 6 Side wall 7 Upper flap 7a Inner flap 7b Outer flap 7c Outer end connected 8 Lower flap 13 Article

Claims (6)

[Claims] 1. A box having a normal structure assembled from cardboard or other paperboard, and a releasable heat-shrinkable film lined over the entire side wall of the box and the inside of the upper and lower flaps. In addition to limiting the adhesion of the film to only the upper and lower flaps, the upper flap is partially adhered to the lower flap, and is completely adhered to the lower flap. A packing paper box, wherein the heat-shrinkable packaging is configured to be detachable from the lower flap at the time of disposal so as to be separable from the box body. 2. The upper and lower flaps, which are successively provided with folding lines at the top and bottom of each side wall of the box body, include an inner flap and a butt outer flap, and the inner flap and the outer flap of the upper flap are each one set. The outer ends are partially connected, and are formed so as to be able to be folded as a single flap on both outer side surfaces of the side wall from the fold line when the box is flat, and bent from the connection portion when the box is formed by expanding the side wall. The packing paper box according to claim 1, wherein the packing paper box is configured to be located along the outer side surface of the side wall. 3. The heat-shrinkable film is adhered to one side of the paperboard before blank forming of the box body, and is punched together with the paperboard at the time of forming the upper and lower flaps by punching, so that the inside of the side walls and the upper and lower flaps is formed. 2. The packing paper box according to claim 1, wherein the packing paper box is entirely lined. 4. A box having a normal structure assembled from cardboard or other paperboard, and a releasable heat-shrinkable film lined over the entire side wall of the box and the upper and lower flaps. In addition, the film was bonded only to the upper and lower flaps, the upper flap was partially used for the lower flap, and the packaging paper box was used for the entire lower flap. Thereafter, the film was peeled off from the upper flap and wrapped over the article from the side, and then the film was heated and shrunk in that state, and the article was tightened and fixed to the bottom of the box, and then the upper flap was closed and the package was closed. A packing method characterized by being completed. 5. The packing method according to claim 4, wherein the heat shrinkage of the film is performed by passing the box through a shrink tunnel. 6. The packing method according to claim 4, wherein the removal of the article tightened and fixed in the box is performed by opening the box with the bottom of the box facing upward and opening a lower flap constituting the bottom. .