JPH0635928Y2 - Corrugated cardboard box for preventing load collapse - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cardboard box mainly used as a case for collectively transporting beverages such as milk, coffee, soft drinks, etc. in a paper container. The present invention relates to a cardboard box provided with outer posts for reinforcing and preventing collapse of a load on outer surfaces of four corners.

[Prior Art] Conventionally, a plastic container has been often used as a returnable box for mass-transporting beverages in paper containers such as milk and juice. However, in recent years, corner-reinforced corrugated cardboard boxes, which are advantageous in terms of price and strength, have attracted attention because they meet user demands such as cost reduction and one-way containerization.

Generally, paper shipping boxes have low compressive strength, so
If they are stacked in multiple stages during cargo handling and transportation, the load may cause buckling, bulging of the body, slackening of the bottom, and the like. Normally, the strength that can withstand the load and twisting when stacking paper shipping boxes is contributed by the corners formed by bending the material (base paper) that makes up the boxes. It is known that the overall pressure resistance is improved. Therefore, in order to reinforce each of the four corners of this kind of transport box, a corner reinforced container has been proposed in which flaps are extended at both ends of the opposite side surfaces of the box and the flaps are bent to form corner posts at the inner corners of the box. (For example, US Pat. No. 2441522).

As shown in FIG. 10, the method of forming the corner posts is such that the post forming pieces 5 are formed on both sides of the side plates 40 and 41 connected to the bottom plate 30.
Ruled line 52 that connects 0 and 51 and is provided between these post forming pieces
By connecting the post-forming pieces 50, 51 through the post-forming pieces 50, 51 by folding and adhering the post-forming pieces 50, 51 inside the end plates 60, 61 via the ruled line 52 provided between these post-forming pieces, As an example, an angle-shaped corner post Ip was erected on the inner corner portion.

[Problems to be Solved by the Invention] As shown in FIG. 11, the corner reinforcing container has an inner side of the box formed by attaching post forming pieces 50 and 51 connected to both sides of the side plate to the inside of the end plate. The structure was such that the inner post Ip was formed at the corner. Therefore, a gap (step) corresponding to the thickness of two material sheets of the post is formed between the inner surface of the box and the contents accommodated in the box (see FIG. 12). The volume loss occurs when a rectangular paper container (for example, a milk container) is accommodated due to the step. Further, the contents (paper container) accommodated in the box may rattle during transportation, or the contents may be pushed and dented or damaged at the end of a post that travels inside. When the contents are dented, the commercial value is reduced, and the adhesive portion is peeled off due to the deformation, so that there is a problem that a liquid container such as a beverage container leaks.

On the other hand, when carrying out the work of stacking a large number of the above boxes in a warehouse, a vehicle, etc. in a multi-tiered manner, if they are piled up randomly, the occupied space becomes large, and the loading condition becomes unstable and it is easy to lose the balance, and the load collapses. It is easy to wake up.

Therefore, the present invention solves the above problems and has a structure in which the load is not easily collapsed during stacking, and yet it sufficiently withstands the vibration impact during stacking or transportation and does not cause deformation or damage to the contents. It is intended to provide an outer post type reinforced cardboard box.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a wrap round packaging box or a top open type rectangular tubular box, at both ends of a pair of side plates facing each other of the box body. Connect extension flaps that extend laterally, fold these extension flaps to the outside of the box body through folding creases, and attach them to the outer surface of both gable plates or both side plates to reinforce the outer surfaces of the four corners of the box body. The present invention proposes a corrugated cardboard box for preventing load collapse in which an outer post is formed and a fitting protrusion protruding upward from the top surface of the box body is formed at the upper end of the outer post.

[Embodiment] An embodiment of the cardboard box of the present invention will be described below with reference to the drawings. In this embodiment, a corner post having a substantially right-angled cross section is formed along the outer surfaces of the four corners of the box, and the boxes stacked on the upper ends of the corner posts are fitted so that the boxes do not slip forward, backward, leftward, and rightward and collapse. It is an example showing a packaging box in which the protrusion 20 is formed.

FIG. 1 is a development view of a corrugated cardboard blank sheet used in the present invention, in which reference numerals 1 to 5 are outer wall plates connected in one direction, and in terms of individual functions, reference numeral 1 is a rectangular bottom plate, and 2 is a rectangular bottom plate. Reference numerals 3 and 3 are left and right side plates, 4 is a top plate, and 5 is a fitting flap. Reference numerals 6 and 7 are end plates connected to the front and rear ends of the bottom plate 1, and 8 and 9 are end plates connected to the front and rear ends of the top plate 4, which are similar to the above. These end plates 6 to 9 are assembled at the time of assembly as described later. , The tips of the edges are butted against each other so that they can be closely closed so that no gap is created on the gable face. Reference numerals 10, 11 and 12, 13 are left and right side plates 2, 3.
Extension flaps for forming corner posts connected to the front and rear ends of the.

One end of the corner post forming extension flaps 10, 11, 12 and 13 connected to the left and right side plates 2 and 3 is laterally projected so as to be slightly wider than the side plates.
), And by engraving two parallel folding lines 14a, 14b to 17a, 17b on the extension flap, three reinforcing panels 10a, 10b, 10c to 13a of equal width are formed on each of them. , 13b, 1
Partition 3c.

When assembling the above blank sheet, first, the flaps 10a, 11a, 12a, 13a on the free end sides of the respective extension flaps are folded so as to come into contact with the outsides of the side plates 2, 3, respectively.
After this, the bottom plate 1, the left and right side plates 2, 3 and the top plate 4 connected in one direction are assembled into a rectangular tube shape, and then the end plates 6 to
Bend 9 inward to close the end face. Then, as shown in FIG. 2 or 3, the polymerized reinforcing panels are adhered to the outer surface of the end plate, and the reinforcing panels on the free end side are adhered to the side plates to form a right angle along the outer surface of the four corners of the box. A wrap round package that has a corner post (outer post) 18 with a rectangular cross section and the upper end of the corner post protrudes above the top surface of the boxes, and that also serves as a fitting protrusion 20 for preventing misalignment of stacked boxes. The box is completed.

Since the corner posts are overlapped with the end faces as shown in FIG. 2, they improve the compressive strength of the end faces and do not cause buckling or blistering during stacking. Further, since the corner posts 18 do not project to the inner surface side of the box, and therefore the inside of the gable plate or side plate of the box is a flat surface, when the contents are accommodated, a space between the inner surface of the box and the contents A is reduced to the conventional type. As described above, there is no possibility that a gap is generated and the content is loosened during transportation, the content is damaged, or a volume loss is caused, which is advantageous.

The packaging box shown in FIG. 2 has a structure in which a joining flap 5 is continuously provided on the end edge of the side plate 2 and the joining flap 5 and the top plate 4 are stuck together when the box body is stuck on the body. However (see FIG. 5), of course, as shown in FIG. 4, it is possible to continuously connect the joining flaps 5 to the edge of the top plate 4 and glue the flaps to the side plate 2 (see FIG. 6). ).

The case shown in FIG. 7 shows a window-reinforced type cardboard box. The difference from that shown in FIG. 2 is that a side plate and a lid member 19a which are separate from each other are prepared and the top surface is used. It is a point attached to the opening. FIG. 8 is a completed assembly diagram showing a state in which the upper surface of the box is covered with the lid member 19a.

FIG. 9 shows a state in which the boxes of FIG. 2 are stacked in multiple stages, and the bottom of the upper box is fitted and placed inside the fitting protrusion 20 formed by the upper ends of the corner posts attached to the corners. There is.
The boxes stacked in this way are placed so that the upper boxes do not shift in the lateral direction or the front-back direction,
A stable stacked state can be obtained.

Although illustration is omitted, it is possible to dispose a Z-shaped, I-shaped, or H-shaped partition plate having the same height as the inner dimension of the box inside the box. When such a partition plate is inserted in the box, not only the original partition function but also the bottom strength of the upper box can be improved when a number of boxes are stacked, and the bottom of the weight of the contents. It acts to prevent loosening. When the partition plate as described above is provided in the box, a step difference in the sheet is not generated on the inner surface of the box.

[Advantage of the Invention] In the box of the present invention, since the outer post integrated with the side surface or the corrugated surface is attached to the outer surface of the corner of the box, the compressive strength is improved, and the box is prevented from being deformed or damaged during stacking. In addition, since there is no step difference in the sheet in the box, there is no volume loss, and the contents do not rattle or are deformed by being pushed during transportation. Since the fitting protrusion for preventing the collapse of the load when stacked is provided at the upper end of the, the stability when the stack is stacked in multiple stages is improved, and the special effect of preventing the collapse of the load is exerted.

[Brief description of drawings]

FIG. 1 is a development view showing an embodiment of the present invention, FIG. 2 is an assembly view, FIG. 3 is a cross-sectional view, FIG. 4 is a development view of another embodiment, FIG. 5 and FIG. [Fig. 3] is an explanatory view showing a state where the body is attached.
7 and 8 are assembly drawings of the third embodiment, FIG. 9 is a perspective view showing a stacked state of boxes, and FIGS. 10, 11 and 12 are explanatory views of a conventional type. . 1 ... Bottom plate, 2, 3 ... Left and right side plates, 4 ... Top plate, 5 ...
Joining flaps, 6,7,8,9 …… Wife plate, 10,11,12,13 …… Extension flaps, 10a, 10b, 10c, 11a, 11b, 11c, 12a, 12b, 12c, 13a, 13b, 13c…
… Reinforcement panels, 14,15,16,17 …… Ruled lines, 14a, 14b, 15a, 15b, 16a, 16b, 17a, 1
7b: Bent ruled lines, 18: Corner post, 19: Lid material, 20: Fitting protrusion.

Claims (1)

[Scope of utility model registration request] 1. A wrap round packaging box or a top open type square tubular box, wherein extension flaps extending laterally are connected to both ends of a pair of side plates facing each other of the box body,
This extension flap is bent to the outside of the box body through a folding ruled line and attached to the outer surface of both gable plates or both side plates to form a reinforcing outer post on the outer surface of the four corners of the box body, and the outer post A cardboard box for preventing load collapse, which is characterized in that a fitting protrusion projecting upward from the top surface of the box body is formed on the upper end of the box.