JP7026761B2 - 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.

In this wrap round box, a corrugated cardboard sheet is folded so as 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 flap 52 extending from the top surface and the bottom surface by step crushing processing 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 notched.

In such a lap 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 intended to be inconspicuous and the complaints from the distributors to be reduced.

Jitsufuku 4-11929 Gazette

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, and the inner flaps that are bent to wrap the article and extend from the pair of side plates, respectively, and the top plate and the bottom plate are used. In a cardboard wrap round box, each of which is attached to an extending outer flap 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 adhesives of the lower outer flaps extending from the face plate to the inner flaps.
The notch is linear with no width.
There is a gap between the tip edges of the upper and lower facing outer flaps, and when a load due to stacking acts, the part facing the notch of the inner flap falls back and forth and deforms so that it overlaps. Along with this, the tip edges of the upper and lower facing outer flaps are in contact with each other.

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 middle portion on the tip end side of the inner flap that does not adhere to the outer flap, the assembling property and the sealing property are not deteriorated.

When a large load is applied due to stacking in a warehouse where the goods 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 distributors 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 on the tip side of the inner flap. Since it is guided to, the deformation can be concentrated on the portion facing the cut of the inner flap, 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 same perspective view showing the packaging state as above. End view showing the same packaging condition The same perspective view showing the stacked state as above. Enlarged perspective view showing the deformed state of the inner flap as above. Enlarged end view showing a reference form of the notch 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 transport 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 connected in the direction of the corrugated cardboard step, 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 lines created by the ruled lines, cuts 4a with bent ends are inserted in order to reduce bending resistance and prevent bending from returning. An arcuate cut line 6a is inserted 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 plates 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. Is said to be a modified turning part 8b. The inclined direction of the inclined portion 8a and the direction toward which the inclined 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 turning portion 8b in the width direction of the inner flap 5 are set to be about 1/4 of the length B of the notch 8, respectively.

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 at 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 portion of the notch 8 is exposed from the gap, and the other parts of the notch 8 are on the back side of the outer flap 6. It is designed to hide in.

In the lap 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 displaceable region of the adhesive portion G becomes narrow even if the height of the wrap round box is low. There is no problem, and the sealing performance does not deteriorate.

Then, in the case of 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 is 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, so that the action of suppressing the deformation of the outer flap 6 can be 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 diagonally 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 inclined portion 8b is changed from the oblique portion 8a, even if the notch 8 is heavy such as a retort pouch 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, the notch 8 has a width in the vertical direction as shown in FIG. 7, although it is a reference embodiment not included in the embodiment of the present invention . It may be a cutout groove with a.

Further, although only the middle 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 parts are hidden behind the outer flaps 6 , the upper and lower facing portions are exemplified. The notch 8 may be exposed as a whole so that the outer flap 6 is 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. However, 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 exemplified, but the same configuration as described above can be applied to a box made of paperboard.

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

Claims (2)

A top plate (1), a pair of side plates (2) and a bottom plate (3) are connected in series, and the inner flap (5) extending from the pair of side plates (2) and the top plate are bent to wrap the article. In a cardboard wrap round box in which the outer flaps (6) extending from (1) 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 that does not reach the boundary with the side plate (2), and the cut (8) is made from the top plate (1). Adhesive part (G) of the upper outer flap (6) extending to the inner flap (5) and adhesive part (G) of the lower outer flap (6) extending from the bottom plate (3) to the inner flap (5). Located between
The notch (8) is a linear one with no width.
There is a gap between the tip edges of the upper and lower facing outer flaps (6), and when a load due to stacking acts, the part facing the notch (8) of the inner flap (5) from above and below A lap round box characterized in that it falls back and forth and deforms so that it overlaps, and along with this, the tip edges of the upper and lower facing outer flaps (6) come into contact with each other. Claim 1 is characterized in that the ruled line (7) at the boundary between the inner flap (5) and the side plate (2) is a convex shape bulging from the inner flap (5) to the side plate (2). Wrap round box as described in.

Images