JP6815101B2 - Wrap round box - Google Patents

Description

The present invention relates to a cardboard wrap round box such as corrugated cardboard or paperboard that wraps an article so as to wrap it.

As a corrugated cardboard wrap round box used for transport packaging of various products, the following Patent Document 1 describes the one shown in FIG.

This wrap round box is bent so that a corrugated cardboard sheet wraps the product to form a top surface, a pair of side surfaces, and a bottom surface, and an inner flap 51 extending from the pair of side surfaces and an outer flap 52 extending from the top surface and the bottom surface, respectively. Is bonded at the adhesive portion G and sealed at the end face.

In this lapland box, a strip-shaped thin portion 53 having a width of 5 to 15 mm is formed on the outer flaps 52 extending from the top surface and the bottom surface, respectively, by a step crushing process compressed along the ruled line at the base thereof, and the top of the inner flap 51 is formed. Both ends on the front and bottom sides are cut out.

In such a wrap round box configuration, when a large load is applied in a stacked state, the thin portion 53 of the outer flap 52 bends outward due to the vertical pressing force, and the deformation of the end face is absorbed at this portion. In this way, the deformation of the outer flap 52 is made inconspicuous, and it is intended to reduce complaints from distributors.

Jitsufuku No. 4-11929

However, as described above, in the wrap round box in which the thin portion 53 is provided at the base of the outer flap 52, the outer flap 52 is accurately bent along the ruled line of the boundary between the top surface and the bottom surface when assembled by the caser. It may disappear and the assembly may be hindered.

Further, if the height in the assembled state is low, the area where the adhesive portion G can be arranged becomes narrow, which may make it difficult to securely seal the adhesive portion G.

Therefore, the present invention is to provide a wrap round box that can be reliably assembled and sealed without causing any noticeable deformation even when stored in a stacked state.

In order to solve the above problems, in the present invention, a top plate, a pair of side plates and a bottom plate are continuously provided, bent to wrap an article, and from an inner flap extending from each of the pair of side plates, and from the top plate and the bottom plate. In a cardboard wrap round box in which each extending outer flap is attached and sealed at the end face.
The inner flap is cut from the tip edge to an intermediate position that does not reach the boundary with the side plate, and the cut is made at the adhesive portion of the upper outer flap extending from the top plate to the inner flap and the bottom. It is located between the adhesions of the lower outer flaps extending from the face plate to the inner flaps .
The notch is an oblique portion in which the portion from the tip edge of the inner flap to the middle is inclined diagonally upward, and the portion following this is a turning portion that is bent from the oblique portion and changed its direction. It was.

Then, the cut was made into a linear shape with no width.

Further, the ruled line at the boundary between the inner flap and the side plate is assumed to be a convex shape bulging from the inner flap to the side plate.

In the wrap round box according to the present invention, since the cut is made in the region of the inner flap on the tip end side that does not adhere to the outer flap, the assembling property and the sealing property are not deteriorated.

Then, when a large load is applied due to stacking in a warehouse storage in a state where the articles are packaged, the portion of the inner flap facing the notch is deformed and the strain in the height direction is absorbed, so that the outer flap is deformed. Is suppressed, and it can be expected that complaints from logistics companies will decrease.

Further, if the ruled line at the boundary between the inner flap and the side plate is a convex shape that bulges from the inner flap to the side plate, the inner flap is curved so as to warp inward, and the compressive force due to stacking is applied to the tip side of the inner flap. Since it is guided to, the deformation can be concentrated on the portion of the inner flap facing the cut, and the action of suppressing the deformation of the outer flap can be surely obtained.

The figure which shows the blank of the wrap round box which concerns on embodiment of this invention. Enlarged view of the inner flap as above The perspective view showing the same packaging state End view showing the same packaging condition The perspective view which shows the stacking state of the same above Enlarged perspective view showing the deformed state of the inner flap as above. Enlarged end view showing the reference form of the cut A perspective view showing a stacked state of the wrap round boxes described in Patent Document 1.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. This wrap round box is assembled from a corrugated cardboard blank as shown in FIG. 1 into the shapes shown in FIGS. 3 and 4, and is used for transportation packaging of goods such as retort foods.

In the blank shown in FIG. 1, the top plate 1, one side plate 2, the bottom plate 3, and the other side plate 2 are sequentially provided in the corrugated cardboard step direction, and the joint piece 4 is attached to the outer end of the top plate 1. It is installed continuously. Inner flaps 5 are connected to both ends of the pair of side plates 2, and outer flaps 6 are connected to both ends of the top plate 1 and the bottom plate 3.

At the boundary between the top plate 1 and the joint piece 4, in addition to the ruled line by the ruled rule, a notch 4a with bent both ends is inserted in order to reduce the bending resistance and prevent the bending from returning. An arcuate cut line 6a is formed in the outer flap 6 extending from the opening for opening.

The ruled line 7 at the boundary between the inner flap 5 and the pair of side plate 2 is a convex arc protruding from the inner flap 5 to the side plate 2. Then, in order to reduce the increase in bending resistance accompanying this, the ruled line 7 is a lead ruled line in which the pressed ruled line and the cut are alternately interrupted.

As shown in FIG. 2, the inner flap 5 is provided with a linear notch 8 from the tip edge to an intermediate position not reaching the ruled line 7 at the boundary with the side plate 2.

The portion of the notch 8 from the tip edge to the middle of the inner flap 5 is an oblique portion 8a inclined with respect to the extending direction of the inner flap 5, and the portion following this is curved from the oblique portion 8a. It is said that the turning part 8b has changed. The inclination direction of the oblique portion 8a and the direction toward which the turning portion 8b faces are upward in the packaged state.

Further, the notch 8 will be described in detail. The length B of the notch 8 is in the range of 1/3 to 2/3 with respect to the length A from the line connecting both ends of the root of the inner flap 5 to the tip edge. It is supposed to fit inside. Further, the displacement C of the oblique portion 8a of the notch 8 and the displacement D of the diversion portion 8b in the width direction of the inner flap 5 are each set to about 1/4 of the length B of the notch 8.

When assembling the above blank into the shape shown in FIG. 3 by a caser and packaging a product such as retort food, a pair of side plates 2 are erected from the bottom plate 3 on which the product is placed, and one side thereof. The top plate 1 is bent horizontally from the face plate 2 so as to cover the product, and the joint piece 4 is bent downward and attached to the other side plate 2.

Next, the inner flaps 5 extending from the pair of side plates 2 and the outer flaps 6 extending from the top plate 1 and the bottom plate 3 are bonded together at the adhesive portion G by a hot melt adhesive that is linearly jetted and applied. And seal with the end face.

In this packaging state, as shown in FIGS. 3 and 4, the notch 8 of the inner flap 5 extends from the adhesive portion G of the upper outer flap 6 extending from the top plate 1 to the inner flap 5 and the bottom plate 3. It is located between the adhesive portions G of the lower outer flap 6 to the inner flap 5.

Further, a gap is slightly opened between the tip edges of the upper and lower facing outer flaps 6, the middle part of the notch 8 is exposed from the gap, and the other part of the notch 8 is the back side of the outer flap 6. It is designed to hide in.

In the wrap round box as described above, since the root portion of the outer flap 6 is not stepped, the bending position of the outer flap 6 does not become inaccurate during assembly, and the outer flap 6 is surely formed in a predetermined rectangular parallelepiped. Can be assembled. Further, since the notch 8 is made in the region of the inner flap 5 that does not adhere to the outer flap 6 at the tip end side intermediate portion, the arrangable region of the adhesive portion G becomes narrow even if the height of the wrap round box is low. There is no, and the sealing property does not deteriorate.

Then, in storage in a warehouse with the products packaged, as shown in FIGS. 5 and 6, when a large load is applied by stacking the products, the portion facing the notch 8 of the inner flap 5 from above and below is front and back. Since the outer flap 6 is deformed so as to be depressed and overlapped and the strain in the height direction is absorbed, the deformation of the outer flap 6 is suppressed, and the number of complaints from the distributor can be expected to decrease.

Further, since the ruled line 7 at the boundary between the inner flap 5 and the side plate 2 has a convex shape that bulges from the inner flap 5 to the side plate 2, the inner flap 5 is curved so as to warp inward, and the compressive force due to stacking is formed. Is guided to the tip end side of the inner flap 5, and the deformation is concentrated on the portion of the inner flap 5 facing the notch 8, and the action of suppressing the deformation of the outer flap 6 is surely obtained.

Further, since the upper and lower outer flaps 6 warp inward together with the inner flap 5 in the packaged state, the phenomenon that the outer flap 6 swells outward is suppressed even when a large load due to stacking is applied, and the appearance is suppressed. The above aesthetics are maintained.

At this time, in the inner flap 5, since the oblique portion 8a of the notch 8 is inclined obliquely upward from the tip, the portion facing the notch 8 is not stretched and the deformation is not hindered. Further, since the notch 8 has a shape in which the direction of the turning portion 8b is changed from the oblique portion 8a, even if the notch 8 is heavy like a retort food in which a large number of products to be packaged are accumulated. , The phenomenon that the inner flap 5 is torn from the notch 8 and the break is expanded is prevented.

In the above embodiment, the oblique portion 8a and the diversion portion 8b of the notch 8 are basically composed of straight lines, and the diversion portion 8b is illustrated to be vertically upward in the packaged state. The turning portion 8b is not limited to a straight line, but may be an arcuate curve, and the turning portion 8b may be downward in the packaged state.

Further, although the notch 8 has an example of a linear shape having no width, which is a reference embodiment not included in the embodiment of the present invention, the notch 8 has a width in the vertical direction as shown in FIG. It may be a cutout groove having a.

Further, in the above embodiment, only the intermediate portion of the notch 8 is exposed from the gap between the tip edges of the upper and lower facing outer flaps 6, and the other portion is hidden behind the outer flap 6. The embodiment of the present invention is not limited to this, and the notch 8 may be entirely hidden behind the outer flap 6 so that there is no gap between the tip edges of the upper and lower facing outer flaps 6. Alternatively, the notches 8 may be exposed as a whole so that the upper and lower facing outer flaps 6 are short and a large gap is opened between the tip edges thereof.

In addition, the ruled line 7 at the boundary between the inner flap 5 and the side plate 2 is curved so as to form an arc as a whole, but the ruled line 7 is curved only at both ends and the middle portion is from a straight line in the vertical direction. It may be composed of straight lines having both ends inclined, and the middle portion may be composed of straight lines in the vertical direction.

By the way, in the above embodiment, the wrap round box whose material is corrugated cardboard is illustrated, but the same configuration as described above can be applied to the box made of paperboard.

1 Top plate 2 Side plate 3 Bottom plate 4 Substitute piece 4a Cut 5 Inner flap 6 Outer flap 6a Cut line 7 Ruled line 8 Cut 8a Oblique part 8b Alternate part G Adhesive part

Claims (3)

A top plate (1), a pair of side plates (2) and a bottom plate (3) are connected in series, and are bent to wrap the article, and an inner flap (5) extending from each of the pair of side plates (2) and a top plate. In a cardboard wrap round box in which the outer flaps (6) extending from the bottom plate (3) and the bottom plate (3) are bonded together and sealed at the end face.
The inner flap (5) is cut (8) from the tip edge to an intermediate position not reaching the boundary with the side plate (2), and the cut (8) is made from the top plate (1). Adhesion (G) of the extending upper outer flap (6) to the inner flap (5) and adhesion (G) of the lower outer flap (6) extending from the bottom plate (3) to the inner flap (5) It is designed to be located between
The notch (8) is an oblique portion (8a) in which the portion from the tip edge of the inner flap (5) to the middle is inclined diagonally upward, and the portion following this is bent from the oblique portion (8a). A lap round box characterized by being a turning part (8b) that has changed direction. The wrap round box according to claim 1, wherein the notch (8) is a linear one having no width. Boundary borders of the inner flap (5) and side plates (2) (7) according to claim 1, characterized in that has an inner flap (5) from the side plate (2) to the swollen convex Or the wrap round box according to 2.

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