JP2013173561A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide corrugated cardboard boxes in which an irregular swell does not occur in a corrugated cardboard box body at a lower stage when they are multiply stacked in a condition where a heavy item is stored therein.SOLUTION: Rectangular corrugated cardboard boxes are provided, wherein, in a pair of side panels 2 and 4 and a pair of end panels 1 and 3, narrow strip-shaped cushioning areas 1x-4x are formed between each of the lateral ruled lines and lateral folding lines by providing horizontal pressing ruled lines L13-L20 in parallel to each of the lateral folding lines L5-L12 being the borders between a top face flap and a bottom face closing panel. In addition, by providing a pair of vertical pressing ruled lines L21-L24 for forming rectangular pressing ruled frames 2W and 4W jointly with a pair of lateral ruled lines in both side panels, a pair of side strip-shaped areas 2y and 4y and center rectangle areas 2z and 4z between both side strip-shaped areas are formed in the pair of the side panels.

Description

  The present invention relates to a packaging box that is difficult to bulge and deform even when a large stacking load is applied and that can be manufactured at high speed with a continuous manufacturing apparatus.

  For packaging, transporting and storing beverages such as plastic bottles, a pair of long side plates with an outer flap on the upper end side and a bottom plate on the lower end side, and an inner flap on the upper end side A cardboard box (so-called A-type cardboard box) assembled from a blank sheet having a pair of short side plates having a bottom plate on the lower end side and a passage is used.

  In the case of such a cardboard box, if a large number of stacks are stored in a sealed state containing PET bottles such as drinking water, the corrugated cardboard boxes are stored during long-term storage or in a high temperature and high humidity storage environment. Corrugated cardboard boxes at the bottom of the stack are crushed by the load, and the side plates are irregularly swollen, causing further deformation and buckling, resulting in damage to the product value and collapse of the stacked cardboard boxes. There is a case to do.

  As a countermeasure against such swelling of the body, a pair of vertical plates serving as the left and right side walls of the packaging box and a pair of flat plates serving as the upper wall surface and the bottom wall surface are alternately arranged, and inner flaps are provided on both side edges of each vertical plate. A piece is formed in parallel with the outer peripheral edge of the upright plate in a pair of upright plates in a wrap-around type packaging box in which outer flaps are connected to both end edges of each flat plate to form an end wall surface. A buckling guide frame line made of a ruled frame of a substantially rectangular frame is provided, and the auxiliary guidance of the ruled line extends from each corner portion of the outer peripheral edge of the elevation plate to each corner portion of the buckling guide frame line adjacent thereto. A cardboard box provided with a wire has been proposed (Patent Document 1).

  In addition, a pair of end plates are connected to both sides of the pair of side plates, a flat plate is connected to the upper and lower ends, and a ruled line that becomes the boundary between the side plates and the flat plate is bent so as to be recessed toward the center of the side plate. In the cardboard packaging box, a packaging box has also been proposed in which the upper and lower ruled lines are made so that both ends are isolated and the middle is linear (Patent Document 2).

The wrap-around cardboard box of Patent Document 1 provided with a buckling guide frame line made of a ruled frame of a substantially square frame formed in parallel along the outer peripheral edge of the upright plate is a plastic bottle beverage or a can beverage. When packing multiple items in a packaged state, buckling is induced even when the standing plate swells outward due to a load on the lower packaging box during long-term storage or storage in a hot and humid environment. The region surrounded by the frame line can be moved outward (inflated) substantially in parallel to keep the elevation plate surface flat.
Further, the cardboard packaging box of Patent Document 2 formed by bending the ruled line that becomes the boundary between the side plate and the flat plate so as to be recessed toward the center portion of the side plate applies a large load to the corner portion having higher strength than the middle portion of the side plate. It is said that the lower box can be prevented from being deformed even when a heavy article is stored and stacked in a number of stages because it can be burdened.

JP 2011-240941 A Japanese Patent No. 4776232

  The wrap-around type corrugated cardboard box of Patent Document 1 provided with a buckling guide frame line made of a ruled frame of a substantially rectangular frame formed in parallel along the outer peripheral edge of the upright plate is an upright plate of the packaging box due to a load. It is suitable for storing goods that do not want to cause deformation that can clearly recognize the shape where the side of the packaging box bulges outside greatly. In addition, the structural change due to the deformation of the buckling guide wire and the corrugated cardboard box generated thereby does not contribute to the improvement of the strength against the load of the box body, but weakens it conversely. Therefore, since the structure does not have a strength that can withstand the load continuously applied to the upper surface even after the deformation, the wrap for accommodating a beverage can or the like that can be expected to prevent further compression deformation of the box by the accommodated product itself. It can only be used as an around-type box. In addition, the wrap-around packaging box can be used only by a user who has packaging equipment, and therefore the cost is higher than that of the A-type cardboard box that is generally used most frequently.

  Further, the cardboard packaging box of Patent Document 2 formed by bending the ruled line that becomes the boundary between the side plate and the flat plate so as to be recessed toward the center portion of the side plate is also used in the case of storing heavy objects and stacking many stages. It is said that deformation can be prevented. However, this packaging box also has a blank sheet of a packaging box formed by bending the ruled line that becomes the boundary between the side plate and the flat plate toward the center of the side plate, and the boundary sheet between the side plate and the top plate and the side plate and the bottom surface. Since the two symmetric ruled lines formed as the boundary with the flat plate on the side are curvilinear, the direction perpendicular to the step (= the direction of the original fabric) Unlike normal A-type corrugated cardboard, in which straight horizontal ruled lines are continuously inserted in the flow direction), the side plate and the top side are placed in the process of putting horizontal ruled lines in the raw material continuously coming out of the corrugator. Two symmetric ruled lines cannot be formed continuously as a horizontal rule that forms the boundary and the boundary between the side plate and the bottom plate, and the curved ruled line is formed simultaneously with the grooves and vertical rules in the punching process. Even if you do, blanks with curved ruled lines formed accurately Off allowance original fabric in the width direction to form the over preparative (trim) only increased forced to take minute becomes low productivity.

  The present invention relates to a lower corrugated cardboard box, even when stored in a high temperature and humidity environment by stacking a large number of stages in a sealed state containing heavy objects such as PET bottles such as drinking water and storing them for a long time. The upper side cardboard box is not crushed in the vertical direction by the loading load of the upper stage cardboard box, causing irregular swelling of the side plate, and the upper side cardboard box stacked by buckling deformation of the lower side packaging box The object of the present invention is to provide a corrugated cardboard box that can be manufactured while maintaining high productivity in a high-speed production line of a normal A-type cardboard box. Is.

  The present invention is a rectangular packaging box consisting of a pair of side plates and a pair of end plates having a flat plate that closes the top and bottom surfaces, represented by a normal A-type cardboard box, and is opposed to the inside of a pair of opposing side plates. When a large load is applied to the rectangular packaging box in the pair of end plates, only the narrow band-shaped buffer region along each fold line that makes a boundary with the top surface flap and the bottom side flat plate is uniform. A horizontal ruled line parallel to each fold line that is guided so as to compressively deform is provided, and a narrow band-like buffer region along each fold line on the top surface side is further provided in the pair of side plates. Along with the compression deformation, the vertical ruled lines that guide the side plate surface to swell slightly outwardly in a trapezoidal shape are provided as a pair of vertical ruled lines parallel to the folding line that forms the boundary with the left and right end plates. And a large load was applied on the rectangular packaging box. About rectangular packaging box body of the octahedral shape state is formed.

(1) A pair parallel to each lateral fold line that forms a boundary with each of a top surface flap and a bottom surface closing plate that are connected to each other in a pair of opposite side plates and in a pair of opposite side plates. A band-shaped buffer region is formed between each lateral fold line and each horizontal ruled line by providing a horizontal ruled line, and in the pair of side plates, By providing a pair of vertical ruled lines that form a rectangular ruled frame integrally with a pair of horizontal ruled lines in this, a boundary is formed between the vertical ruled lines and the left and right side end plates or seams. A rectangular corrugated cardboard box, wherein a side band-like region is formed between each fold line and a central rectangular region surrounded by the rectangular ruled frame is formed.
(2) The rectangular corrugated cardboard box according to (1), wherein the band-like buffer areas on the both end plates and the both side boards are areas that are almost uniformly crushed by a large load applied in the vertical direction of the rectangular cardboard box. .
(3) The pair of vertical ruled lines formed in each of the pair of side plates are octagonal by curving the side plate surface outwardly by a large load applied in the vertical direction of the rectangular cardboard box. The rectangular corrugated cardboard box according to item (1) or (2), wherein the corrugated cardboard box body is a deformation guide ruled line.
(4) The rectangular ruled frame formed in the both side plates is formed by a ruled line with respect to the inner surface side liner of the cardboard box, any one of the items (1) to (3) The rectangular cardboard box described in the item.

  The rectangular corrugated cardboard box of the present invention has a lower corrugated cardboard box in the upper stage even when it is stacked and stored for a long time in a state of containing and sealed in a product or stored in a hot and humid environment. The upper side is stacked by buckling of the lower cardboard box, without the disadvantage that the cardboard boxes stacked on the side are crushed by the weight of the cardboard boxes, causing irregular swelling of the side and end plates. This is a cardboard box that does not fear that the cardboard box will collapse. Furthermore, it is a cardboard box having a structure that can be manufactured while maintaining high productivity by directly using a high-speed production line for manufacturing a normal A-type cardboard box.

It is a blank sheet figure of the state which developed the rectangular corrugated cardboard box of the present invention. It is a perspective view of the state which sealed the rectangular cardboard box of this invention. It is a perspective view which shows the state of the side-plate surface at the time of applying a heavy load from upper direction in the state which sealed the rectangular cardboard box of this invention.

Hereinafter, the rectangular cardboard box of the present invention will be described in detail with reference to FIGS.
As shown in the blank sheet diagram of FIG. 1, the rectangular cardboard box of the present invention has an end plate 1, a side plate 2, an end plate 3, a side plate 4, and a joint margin 5 connected in series via bending lines L <b> 1 to L <b> 4. .
The top plate 1a and the bottom closure plate 1b are connected to the end plate 1 via folding lines L5 and L6. The top plate 3a and the bottom closure plate 3b are connected to the folding line L9. L10 is connected to the side plate 2 through the side plate 2, and the top surface flap 2a and the bottom surface closing plate 2b are connected to each other through the folding lines L7 and L8. The side plate 4 is connected to the top surface flap 4a and the bottom surface closing plate. 4b is provided continuously through bending lines L11 and L12.

In the end plate 1, a horizontal ruled line L13 parallel to the fold line L5 on the top surface flap 1a side is formed close to the fold line L5, and between the fold line L5 and the crease line L13. A narrow band-shaped buffer region 1x is formed in
A horizontal ruled line L14 parallel to the fold line L6 on the bottom closing plate 1b side is formed close to the fold line L6, and a narrow band-shaped buffer region 1x is formed between the fold line L6 and the crease line L14. Has been.

Also in the end plate 3, a horizontal ruled line L17 parallel to the fold line L9 on the top surface flap 3a side is formed close to the fold line L9, and between the fold line L9 and the crease line L17. A narrow band-shaped buffer region 3x is formed,
A horizontal ruled line L18 parallel to the fold line L10 on the bottom closing plate 3b side is formed close to the fold line L10, and a narrow band-shaped buffer region 3x is formed between the fold line L10 and the crease line L18. Has been.

On the other hand, in the side plate 2, a horizontal ruled line L15 parallel to the fold line L7 on the top surface flap 2a side is formed close to the fold line L7, and between the fold line L7 and the ruled line L15. A narrow buffer region 2x having a narrow width is formed,
A horizontal ruled line L16 parallel to the fold line L8 on the bottom closing plate 2b side is formed close to the fold line L8, and a narrow band-shaped buffer region 3x is formed between the fold line L8 and the crease line L16. Is formed.

In the side plate 2, a vertical ruled line L 21 parallel to the fold line L 1 is formed on the fold line L 1 side that forms the boundary with the end plate 1, and the boundary with the end plate 3 is formed. Is formed with a vertical ruled line L22 parallel to the bent line L2, and a pair of horizontal ruled lines L15 and L16 and a pair of vertical ruled lines L21. And L22 integrally form a rectangular ruled frame 2W in the side plate 2.
The band-shaped buffer regions 1x to 4x are located between the longitudinal ruled line L21 and the folding line L1 on the end plate 1 side and between the longitudinal direction ruled line L22 and the folded line L2 on the end plate 3 side. The wider side band regions 2y and 2y are formed. A rectangular region 2z surrounded by the ruled frame 2W is formed.

Also in the side plate 4, a horizontal ruled line L19 parallel to the fold line L11 on the top surface flap 4a side is formed close to the fold line L11, and between the fold line L11 and the crease line L19. A narrow buffer region 4x having a narrow width is formed,
A horizontal ruled line L20 parallel to the fold line L12 on the bottom closing plate 4b side is formed close to the fold line L12, and a band-shaped buffer region 4x having a narrow width is formed between the fold line L12 and the crease line L20. Is formed.

  In the side plate 4, a vertical ruled line L 23 parallel to the fold line L 3 is further formed on the fold line L 3 side that forms a boundary with the end plate 3. Is formed with a vertical ruled line L24 parallel to the fold line L4, and a pair of horizontal ruled lines L19 and L20 and a pair of vertical ruled lines L23. And L24 integrally form a rectangular ruled frame 4W in the side plate 4.

And between one vertical ruled line L23 and the folding line L3 on the end plate 3 side of the pair of vertical ruled lines L23 and L24 forming the rectangular ruled frame 4W, and the other vertical direction Side band regions 4y and 4y wider than the band buffer regions 1x to 4x are formed between the ruled line L24 and the folding line L4 on the drop margin 5 side. Further, a rectangular region 4z surrounded by the ruled frame 4W is formed.
Yes.

  Among the ruled lines L13 to L24 formed on the both end plates 1 and 3 and the side plates 2 and 4, at least the vertical ruled lines L21 to L24 formed in the side plates are the outer surface of the cardboard box. It is desirable that the side liner surface is formed as a ruled line extending from the liner surface on the inner surface side of the cardboard box to the center so that the liner surface becomes a smooth surface in a normal state.

  As described above, the blank sheet of FIG. 1 in which the horizontal and vertical ruled lines are provided in the pair of end plates and the pair of side plates is composed of both end plates 1, 3, both side plates 2, 4, and joint margins. 5 is bent in order from each of the folding lines L1 to L4, and the joint margin 5 is joined to the side edge of the opposite end plate 1 to form a cylindrical body, and the bottom closing plates 1b to 4b are folded and joined. The product is accommodated in a rectangular box with the top surface open and formed by closing the bottom surface, and the top surface is sealed with the top surface flaps 1a to 4a, so that the product cardboard box A shown in FIG. 2 is obtained. .

  The cardboard box A of the present invention in the merchandise accommodation state of FIG. 2 is subject to a large load from the upper surface side like the lower cardboard box when the merchandise accommodation cardboard boxes are stacked and stored in multiple stages. As shown in FIG. 2, the band-like buffer areas 1x (see FIG. 1) and 3x on the top surface side of both end plates 1 and 3 in the cardboard box of FIG. 2, the band-like buffer areas 1x (see FIG. 1) and 3x on the bottom side, and As shown in FIG. 3, the band-like buffer areas 2x and 4x (see FIG. 1) on the top side of both side plates and the band-like buffer areas 2x and 4x (see FIG. 1) on the bottom side are crushed. The top surface side edge 3 is in a state where the fold line L9 and the horizontal ruled line L17 overlap, and the top surface side edge of the side plate 2 is in the state where the fold line L7 and the horizontal ruled line L15 overlap. The bottom edge of the side plate 2 has a fold line L8 and a horizontal ruled line L16. Become became state.

Although hidden in FIGS. 2 and 3, the edge on the top surface side of the end plate 1 is in a state where the fold line L5 and the ruled line L13 in the lateral direction overlap each other, and the edge on the bottom surface side of the end plate 1 is bent. The line L6 and the horizontal ruled line L14 are overlapped,
Similarly, the top surface side edge of the side plate 4 is in a state where the folding line L11 and the horizontal ruled line L19 overlap, and the bottom side edge of the side plate 4 is in the state where the folding line L12 and the horizontal ruled line L20 overlap. It becomes.

As described above, the band-like buffer areas on the top and bottom sides of the both end plates and both side plates of the cardboard box in the state shown in FIG. The vertical ruled lines L21, L22, L23, and L24 are bent so that the surfaces of the two side plates 2 and 4 swell outward, and as shown in FIG. A trapezoidal bulge is formed by the side belt-like regions 2y and 2y, and a trapezoidal bulge is formed by the central rectangular region 4z and the pair of side belt-like regions 4y and 4y. At this time, the vertical ruled lines in the side plates 2 and 4 serve to guide the plate surfaces of the side plates 2 and 4 to bend beautifully outward.
In this way, when the side plate surfaces swell in a trapezoidal shape, the shape of the corrugated cardboard body becomes an octagon as seen in the shape of the top surface of FIG. 3, and the compression resistance of the entire cardboard box against the load on the top surface The overall shape shown in FIG. 2 is improved compared to a rectangular corrugated cardboard box, and has a structure that has a strength that is unlikely to cause buckling in the trunk of the corrugated cardboard box.

As described above, the lateral ruled lines formed on both end plates and both side plates of the cardboard box according to the present invention are band-shaped buffer regions that are uniformly crushed when a large load is applied to the top surface of the cardboard box. Is provided to form
And the width | variety of this strip | belt-shaped buffer area | region can be arbitrarily set in the range which becomes a state crushed uniformly as mentioned above by the maximum load applied in a normal stacked storage state, However, The strip | belt-shaped buffer area | region (1x-4x) ) Is preferably in the range of 3 to 10 mm, most preferably 5 to 8 mm. In the case of less than 3 mm, the folding line and the ruled line are too close to each other when a load is applied, and the buffer line is not sufficiently buffered. On the other hand, if it exceeds 10 mm, the width is too wide, and even if a load is applied, the folding line and the ruled line are not crushed so as to overlap each other, and the buffering action is not achieved.

  Incidentally, the vertical and horizontal ruled lines (1x to 4x = 5 mm width, 2y, 4y = 40 mm width) were provided on a normal A-type cardboard box (side plate width 330 mm, end plate width 180 mm, height 320 mm). As a result of carrying out a load load test (test of 120 kg, loading time 72H) on the A type cardboard box of the present invention and a normal A type cardboard without the ruled line, the normal A type cardboard has an average height of four sides. While the variation was 5.3 mm, the average amount of swelling on the side plate surface was 12.5 mm, and the average amount of swelling on the end plate surface was 5.5 mm, whereas the overall state was a distorted body swelling state, In the case of the A-type corrugated cardboard according to the present invention, the average height variation of the four sides was 9.5 mm, but the average swelling of the side plate surface was 6.0 mm, and the average swelling of the end plate surface was 4. 0.0mm, and the body is slightly trapezoidal at the center of the side plate The whole shape of blistering had a barrel of uniform octagonal.

  Further, when the state inside the cardboard box is observed, in the case of a normal A-type cardboard, a large number of distortions consisting of irregular irregularities having different sizes are generated on the inner liner surface. It was confirmed that the corrugated cardboard box formed by combining the horizontal ruled lines and the vertical ruled lines used in the above has a clean and smooth surface on the liner.

  The corrugated cardboard box of the present invention formed by combining the horizontal ruled lines and the vertical ruled lines described above has the ruled lines formed on the end plates and the side plates, and the end plates and the side plates. Since it is a straight ruled line parallel to the straight ruled line that forms the boundary with the top surface flap and the bottom closure plate that are connected to the board, a normal A-type corrugated cardboard production line Can be used as they are, and also when a horizontal ruled line and a vertical ruled line are inserted in the process of vertical rule and grooving, the horizontal press for forming the band-shaped buffer region is used. Since the ruled line is only a straight line parallel to the folding line on the top flap side and the bottom closing plate side formed on the cardboard sheet, the corrugated cardboard is used as in the case where the horizontal ruled line is a complicated line with different directions. Take a lot of margin in the width direction of the web It is not required, in spite of the fact that by increasing the number of 押罫 line, was enough simply to schedule a drop margin of the same extent as if the production of normal A-type cardboard.

The cardboard box of the present invention can have a handle hole H in both end plate surfaces, as in a normal cardboard box.
Similarly, a cut tape T is provided over the entire length of all end plates, all side plates, and joints, and a liner cut portion C is provided at a predetermined position of the cut tape so that the corrugated cardboard body portion is cut up and down and opened. It is also possible to have a structure that can be made.

  The cardboard box of the present invention is used for product packaging that is required to be stacked and stored in a large number of stages in a state where a heavy product is contained and sealed, or to be stored in a hot and humid environment. It is extremely useful as a corrugated cardboard box, and in particular, as a product packaging box, it is useful for packaging a product that dislikes the occurrence of even non-uniform deformation around the trunk.

DESCRIPTION OF SYMBOLS 1,3: End plate 2, 4: Side plate 5: Joint margin 1a, 3a: Top flap 2a, 4a: Top flap 1b, 3b: Bottom closing plate 2b, 4b: Bottom closing plates L1-L12: Bending Lines L13 to L20: Horizontal ruled lines L21 to L24: Vertical ruled lines 1x to 4x: Strip buffer areas 2y, 4y: Side band areas 2z, 4z: Central rectangular area A: Corrugated cardboard box

Claims (4)

A pair of lateral directions parallel to each lateral fold line that forms a boundary with each of the top surface flap and the bottom surface closing plate that are connected to each other in the pair of opposite side plates and in the pair of opposite end plates A band-shaped buffer region is formed between each lateral fold line and each lateral ruled line by providing a ruled line, and a pair of side plates in the pair of side plates are further provided. Each fold line that forms a boundary between the vertical ruled line and the left and right end plates or joints by providing a pair of vertical ruled lines that form a rectangular ruled frame integrally with the horizontal ruled line A rectangular corrugated cardboard box, wherein a side belt-like region is formed between and a central rectangular region surrounded by the rectangular ruled frame is formed.   2. The rectangular cardboard box according to claim 1, wherein the band-like buffer areas on the both end plates and the two side boards are areas that are almost uniformly crushed by a large load applied in the vertical direction of the rectangular cardboard box.   A pair of vertical ruled lines formed in each of the pair of side plates are formed in an octagonal cardboard box cylinder by curving the side plate surface outwardly by a large load applied in the vertical direction of the rectangular cardboard box. The rectangular cardboard box according to claim 1, wherein the rectangular cardboard box is a deformation guide ruled line that forms a portion.   The rectangular cardboard box according to any one of claims 1 to 3, wherein the rectangular ruled frame formed in the both side plates is formed by a ruled line with respect to an inner surface side liner of the cardboard box. .

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