JPH018504Y2 - - Google Patents

Description

[Detailed explanation of the idea]

INDUSTRIAL APPLICATION FIELD The present application relates to an improvement of a corrugated cardboard box, and more specifically to a type A corrugated box that is reinforced with reinforcing pieces using inner flaps at the inner heights of the four corners of the A type corrugated box. Conventional technology Conventionally, an A-type cardboard box has been constructed as a packaging box in which the bottom flap is closed to form a bottom part, and after storing the stored items, the upper flap is closed to easily pack the stored items. It is something. Problems that the invention aims to solve: However, as the weight of the stored items increases, the A-type corrugated boxes that have been developed so far tend to stretch during loading during transport and storage, causing the boxes to collapse. Many of the boxes have defects that cause them to bulge out, so in order to prevent the trunk from stretching, efforts have been made, such as using materials with high compressive strength or inserting an inner frame inside the box, but none of them are satisfactory. The current situation is that there is no such thing. The present invention relates to a completely new technique developed in view of these conventional problems. Means for Solving the Problems The present invention, which solves the above-mentioned problems, has reinforcing strips by cutting vertical score lines in the four corners of each inner flap that is connected above and below each living surface forming the A-type corrugated box. The present invention relates to a corrugated cardboard box having a reinforcing piece on the inner wall, characterized in that the reinforcing piece is bent inward of each living surface and the ends are stuck together in a butt shape for reinforcement. Function Since the corrugated cardboard box according to the present invention having a reinforcing piece on the inner wall is constructed as described above, it has higher strength than a conventional corrugated cardboard box of the same size even though it has a base paper structure with a lower basis weight. We have developed an A-type cardboard box that holds well. An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view of a conventional A-type cardboard box. FIG. 2 is a developed plan view of FIG. 1, in which the living surface 1, the side surface 2, the living surface 1', the side surface 2', and the lining 3 are connected in one direction, and there are inner flaps 4' at the top and bottom of each. 4. The outer flaps 5', 5, the inner flaps 6', 6, and the outer flaps 7', 7 are provided, and the pasting allowance 3 is attached to the inner edge of the living surface 1 to form a frame. After folding the inner lower flap inward, both lower outer flaps 5 and 7 are folded inward to form the bottom. Next, after storing the contents, the lid part is sealed by folding each flap inward in the same way as the bottom part, and the width of each outer flap is the width of the box, that is, the length of the living surface b. Because it is a thing, it is 1/2b. Therefore, the width of each inner flap is also 1/2b, so when the side surface a is larger than the living surface length b, naturally there is a length a-b between both inner flaps 4 and 6 at the bottom. This results in exposed portions c, c of both outer flaps 5, 7. The same applies to the lid. In this invention, each inner flap 4', 4, 6', 6
Two parallel vertical score lines 8, 8 are cut at vertically symmetrical positions on both ends to form reinforcing pieces 9b, 9b at both ends, and a central inner flap of 10b, 10b at the center. The reinforcing pieces 9b, 9b are then bent inward and pasted inside the living surfaces 1, 1' in a butt-like manner to form the cardboard box of the present invention. Since the present invention is as described above, when the box is assembled, reinforcing pieces are pasted on both corners of the inner surface in the height direction of each living surface in a butt-like manner, so that the reinforcing pieces are pasted in a butt-like manner, unlike the conventional A shown in Fig. 1.
Compared to standard cardboard boxes, the compressive strength in the height direction of the box is significantly increased. The following will explain the results of comparing the compressive strengths of the conventional type A corrugated box and the corrugated cardboard box of the present invention. (Sample) Product name Food storage box Dimensions 455mm (side) x 305mm (living surface) x 260 (depth) Material K220 x SCP160 x K220 (base paper composition) The conventional A-type box constructed as above and the inventive one. Compressive strength measurement of A-type box

【table】

[Table] As shown in the above measurement results, the compressive strength of the Type A box of the present invention is increased by approximately 20% compared to the conventional Type A box with the above base paper structure and dimensions. Therefore, as shown in the above example, by forming reinforcing pieces using the upper and lower inner flaps and attaching them to both sides of the inner corners in the height direction of the living surface, as in the A-type corrugated box of the present invention. By increasing the compressive strength, it is possible to completely prevent the trunk from stretching due to the loaded weight during transportation and storage after storing the article. Therefore, when a box with the same dimensions is formed by improving the cardboard box of the present invention, even if the base paper has a lower basis weight than the material used in the past, it has sufficient compressive strength compared to the conventional material. It has the effect of being able to hold the same amount as a type A cardboard box.

[Brief explanation of the drawing]

Figure 1 is a partially cut away perspective view of a conventional A-type cardboard box, Figure 2 is a developed plan view of Figure 1, Figure 3 is a developed plan view of the cardboard box of the present invention, and Figure 4 is A developed plan view when each reinforcing piece is attached to the living surface,
Fig. 5 is a perspective view of the cardboard box of the present invention. In the figure, 1 and 1' are the living surfaces, 2 and 2' are the sides, 3 is the pasting allowance, 4 and 4' are the inner flaps, and 5 and 5 are the inside flaps. ' is an outer flap, 6 and 6' are inner flaps, 7 and 7' are outer flaps, 8 and 8 are vertical score lines, 9b and 9b are reinforcing pieces, and 10b and 10b are central inner flaps, respectively.

Claims (1)

[Scope of utility model registration request] A where a living surface, a side surface, a living surface, a side surface, and a wall are arranged in a row in one direction, and an inner flap, an outer flap, an inner flap, and an outer flap are arranged in a row at the top and bottom of each.
In a cardboard box having a type cardboard box shape,
Two parallel longitudinal cut lines on both sides of each inner flap are cut at vertically symmetrical positions, each inner flap is divided into a central inner flap and a reinforcing piece, and both reinforcing pieces are attached to the inner surface in the height direction of the living surface. A cardboard box with reinforcing pieces on the inside wall that are butt-attached to each corner.