JPH1024920A - Corrugated board box with variable capacity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply change a bulk of a corrugated board box without deteriorating a texture of corrugated board and make the box respond to change of size of a product as well. SOLUTION: A lower box 1 is formed out of corrugated board into a pail-like shape whose top end side is opened. Likewise, an upper box 2 is formed out of corrugated board into a pail-like shape whose bottom end side is opened, which can be inserted from the top end side of the lower box and can be pulled out from it. In the lower box, an auxiliary flap 1d foldable along an inside face of a side plate flap 1a which forms a side wall is provided. In the auxiliary flap 1d, connected holes 1e having nearly uniform opening cross sections in the relative moving direction between the flap 1d and the upper box 2 are formed. At the upper box 2, a connected arm 2e which is inserted into the connected holes 1e and passes through from the inside face of the auxiliary flap 1d to the outside face is provided. At the tip of the connected arm 2e, an engaging head 2f having a shape wider than the opening width of the connected holes 1e is provided. The length of the connected arm 2e is set to be shorter than the depth of the lower box 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cardboard box for packing various products, and more particularly to a cardboard box having a large capacity when packing and a small bulk after unpacking.

[0002]

2. Description of the Related Art When various goods and products are packed for transportation or storage, cardboard boxes are generally widely used as containers for the packing.

As shown in FIG. 8, a typical example of such a corrugated cardboard box is a peripheral wall portion 51 which forms four peripheral sides and four top plate pieces each of which can be bent at upper and lower edges thereof. 52a to 52d and bottom plate pieces 53a to 53d are provided. And when packing, the bottom plate piece 5
3a to 53d are folded, respectively, and the longer bottom plate piece 5
The butted portions of 3a and 53b are fixed by the staple 54, and the top plate pieces 52a to 52d are also in the closed positions, respectively, and the package is sealed with gum tape or the like.

[0004] On the other hand, such a simple cardboard box is often used in the logistics process in various fields. For example, when products are regularly shipped by truck from a factory to a shipping destination, a cardboard box made of the cardboard box is used. It is common to use a dedicated return box many times. Such returnable boxes are shaped according to the bulk and other characteristics of the product.After delivering the product to the destination, return it to the factory as an empty state, pack the new product again, and The cycle of shipping is repeated.

[0005]

However, since the cardboard box that has been emptied after shipment is collected on a truck with the bulk of FIG. 8, it is difficult to handle because the bulk is large. Loading on the bed is also likely to be unstable.

[0006] Further, after the product is delivered, the truck is transported by loading the cardboard box which is light and has only a large bulk, so that there is a great obstacle in terms of transportation efficiency. In other words, although transportation by truck raises and lowers the freight depending on the load capacity of the load, the mileage and the number of times the truck travels are often set as the standard fare. Since the number of travels is not reduced, it is economically disadvantageous from the factory side.

On the other hand, if the empty cardboard box is folded and collected at the factory, it can be returned to the factory as a box through which a large amount of cardboard boxes can be passed.
Improvements in fares are possible. However, the bottom plate pieces 53a to 53d as shown in FIG.
In the stopped cardboard box, the staples 54 are to be pulled out, but in such an operation, the metal staples 54 are repeatedly pulled out or stabbed in the bottom plate pieces 53a to 53d, so that the corrugated paper is broken quickly. On the contrary it is not practical.

[0008] Even if the cardboard box does not use staples, if it is repeatedly folded or assembled, the folded part becomes brittle first and becomes unstable in strength, and as a returnable box that can withstand long-term use. Not appropriate.

As described above, in the conventional cardboard box, the bulk of the cardboard paper cannot be easily reduced without weakening the cardboard paper when it is not used. Therefore, the transportation cost is reduced especially when used as a returnable box. Also have limitations.

Further, when the specification of the product is changed, for example, when the packing volume of the cardboard box shown in FIG. 8 is only about half of the capacity, the cardboard box itself may be changed in accordance with the specification change. Required. For this reason, cardboard boxes of various dimensions in accordance with the product specifications must be prepared in advance, and in this respect, the cost is easily restricted.

The problem to be solved in the present invention is to provide a cardboard box which can easily change the bulk of the cardboard box without deteriorating the material of the cardboard paper and can cope with a change in the size of the product. It is in.

[0012]

SUMMARY OF THE INVENTION The present invention is directed to a first box formed of corrugated cardboard and open at one end, and a first box similarly formed of corrugated paper and open at one end. A second box that can be inserted into and removed from the open end of the first box, and one of the first box and the second box is provided along the inner surface of a side plate piece forming a side wall. And a connecting hole having a substantially uniform opening cross section in the direction of relative movement with respect to the other box is formed in the auxiliary piece, and the auxiliary box is formed in the other of the first box or the second box. Is provided with a connecting arm that is inserted into the connecting hole of one of the boxes and that passes from the inner surface to the outer surface of the auxiliary piece, and includes an engaging head having a shape wider than the opening width of the connecting hole at the tip of the connecting arm. The length of the connecting arm is shorter than the depth of one of the boxes. .

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first box is a lower box having an open upper end, and a second box is an upper box having a size insertable along the inner wall of the lower box. The lower box and the upper box can have a rectangular planar shape, for example. The lower box is provided with an auxiliary piece which is bent inward from the upper edges of the two opposing long sides thereof, and one or a plurality of, e.g., rectangular connection holes are formed in the auxiliary piece. By providing a connecting arm that can be inserted into the hole and provided with an engaging head at the tip, even when the upper box is pulled up from the lower box, the engaging head is restrained by the auxiliary one side, The box is not separated from the lower box.

Furthermore, if the length of the connecting arm is shorter than the depth of the lower box, even if the upper box is raised to its highest position, the lower end of the side wall of the upper box is included in the lower box. It is kept as it is, which allows usability with the internal volume of the box changed.

Of course, it is also possible to adopt a packing form in which the upper box is placed on the lower side and the lower box is covered from above.
In such a package, the lower box acts like a lid, preventing infiltration of rainwater or the like into the upper box arranged on the lower side.

[0016]

1 is a perspective view showing an embodiment of a cardboard box according to the present invention. FIG. 1 (a) shows a case where the bulk in the height direction is maximized, and FIG. Shows the reduced state.

In the figure, a cardboard box is a combination of a lower box 1 as a first box and an upper box 2 as a second box inserted so as to be vertically movable with respect to the lower box. FIG. 2 and FIG. 3 show exploded plan views of the box 1 and the upper box 2, respectively, and FIG. It goes without saying that both the lower box 1 and the upper box 2 are made of corrugated paper.

The lower box 1 is composed of four side plate pieces 1a which form a rectangular opening cross section when assembled.
a bottom plate pieces 1b that can be bent from the lower edge of each of them, and auxiliary pieces that can be bent along the inner surface of these side plate pieces 1a from the upper edge of each of a pair of longer ones of the side plate pieces 1a. 1d, and a joining margin 1c is formed at one end of the side plate piece 1a. And the side plate piece 1a
By bending these into a rectangular shape along the bending margin between them, connecting the side plate pieces 1a located at both ends by a joining margin 1c, and also bending the bottom plate pieces 1b inward, for example, by stapling, as shown in FIG. Can be assembled in a container shape with an open upper end.

The auxiliary piece 1d is slightly shorter than the length of the long side plate 1a in the longitudinal direction, and the height is also slightly shorter than these side plate 1a. It has a connecting hole 1e formed in a rectangular shape and opened. When the lower box 1 is assembled, the lower box 1 is bent along the inside of the side plate pieces 1a as shown in FIG. 4, and the connecting holes 1e face the side plate pieces 1a.

The upper box 2 has a side plate 1 of the lower box 1 having a bulk around the entire circumference.
and the length of each of the four side plate pieces 2a is set to be slightly smaller than the size of the opening formed by the auxiliary plate 1a and the auxiliary piece 1d, and the top plate pieces 2b are provided at the upper end edges of these side plate pieces 2a so as to be freely bent. At the same time, one end of the side plate 2a is provided with a connection margin 2c. Then, a spacer piece 2d is protruded from the lower end side of the pair of side plate pieces 2a on the long side over the entire length, and three connecting arms 2e are respectively extended downward to these spacer pieces 2d. The connecting arm 2e is provided with a wider engaging head 2f at the lower end thereof, the width of which is slightly smaller than the opening width of the rectangular connecting hole 1e of the lower box 1;
f is wider than this opening width.

The upper box 2 is also formed as a rectangular container having a closed upper end as shown in FIG. 4 by bending the side plate pieces 2a and the top plate piece 2b and connecting the side plate pieces 2a at both ends by a joint margin 2c. As a result, three connecting arms 2e are protruded downward from the opposite side plate 2a on the long side.

The lower box 1 and the upper box 2 are respectively shown in FIG.
Prepare a pre-assembled one as shown in
The lower box 1 and the upper box 2 are integrated by inserting the connecting arm 2e into the connecting hole 1e of the auxiliary piece 1d such that the upper box 2 is dropped into the lower box 1. That is,
As shown in FIGS. 5 and 6 (longitudinal sectional views showing the main parts of FIG. 5), the engaging head 2f is once bent and deformed to pass through the connecting hole 1e from the inner surface side of the auxiliary piece 1d. Thus, the connecting arms 2e are inserted into the corresponding connecting holes 1e. Thereby, the engaging head 2f having a large width dimension has a positional relationship along the outer surface side of the auxiliary piece 1d, and as shown in FIGS. 5 and 6, the top plate piece 2b of the upper box 2
Can be formed so as to be slightly higher than the upper end of the side plate piece 1a of the lower box 1.

In the above configuration, the positional relationship between the lower box 1 and the upper box 2 shown in FIGS. 5 and 6 corresponds to that shown in FIG. Almost the whole is contained in the lower box 1 to minimize its height bulk. On the other hand, when the upper box 2 is pulled up, the connecting arm 2e moves upward in the connecting hole 1e of the lower box 1, so that the height of the upper box 2 with respect to the lower box 1 can be freely changed. it can. When the engagement head 2f approaches the upper end of the opening edge of the connecting hole 1e as shown in FIG.
Since the width of f is wider than the opening width of the connecting hole 1e, the engagement head 2f cannot move upward any more. Therefore, even if the upper box 2 is moved upward, it is not separated from the lower box 1, and as shown in FIG. 1A, the upper box 2 is raised to the maximum height to maximize the internal capacity. can do.

Here, it is assumed that the bottom plate pieces 1b of the lower box 1 are always closed by stapling or the like.
If the top plate piece 2b of the upper box 2 can be opened and closed, the same packing operation as the conventional cardboard box shown in FIG. 8 can be performed. When used as a return box, the internal capacity is maximized as shown in FIG. 1 (a), the product is packed and transported to the shipping destination, and after unpacking, the product is moved upward as shown in FIG. 1 (b). By placing the box 2 in the lower box 1, the bulk in the height direction can be reduced to about half. For this reason, two or more empty cardboard boxes can be loaded on the truck, so that two
If it is made to be collected from the shipping destination to the factory at a rate of one time after the shipment, it is not necessary to rent a truck and transport an empty cardboard box for each shipment, and it is possible to reduce the fare.

Further, even when the shape of the product is changed or the number of products to be stored in one cardboard box is reduced, the height of the upper box 2 is adjusted to provide a cardboard having a capacity corresponding to the bulk of the product. Can be packed in a box. For this reason, for example, in the case where only half the volume of the product is stored in the package having the maximum capacity shown in FIG. 1A, the empty portion occupied by the cardboard box is wasted. By inserting the upper box 2 into the lower box 1 as shown in (b), such a useless space is eliminated and the transportation efficiency by truck is improved.

Further, even when the upper box 2 is moved to change the bulk, there is no need to perform any work such as staple removal and stabbing, so that the work time for changing the bulk can be shortened, and the staples can be removed. There is no deterioration of corrugated cardboard due to repeated stabbing, and the durability is greatly improved.

In such a packing form of the cardboard box, the upper box 2 is disposed on the lower side instead of the lower box 1 and the upper box 2 shown in FIG. It can also be made into a package that can be put on a car. In this case, since the lower box 1 covers the upper box 2 which is disposed on the lower side and the upper end of the side plate piece 2a is open upward, penetration of rainwater or the like is prevented, and Water measures will also improve.

In the embodiment, the lower box 1 is provided with the auxiliary piece 1d and the connecting hole 1e, and the upper box 2 is provided with the connecting arm 2e. An auxiliary piece may be provided on the upper box 1 and a connecting arm may be provided on the lower box 2. Further, not only a pair of upper and lower boxes but also a relationship of boxes arranged on the left and right and overlapping each other may be used.

[0029]

According to the present invention, for example, the height of a pair of upper and lower boxes can be changed to change the internal volume, so that even if the shape or size of the product to be packed is changed, it is different. It is not necessary to manufacture a new cardboard box. In addition, it can be used as a returnable box, which reduces the freight cost of truck transport, and allows the bulk to be changed without any need for staples to be inserted and removed, so that there is no deterioration of corrugated paper and its durability. Also improve.

[Brief description of the drawings]

1A and 1B show an embodiment of a cardboard box according to the present invention, wherein FIG. 1A shows a case where an upper box is raised to a maximum bulk, and FIG. It is a perspective view at the time of inserting into a and making it the minimum bulk.

FIG. 2 is a developed plan view of corrugated paper forming a lower box.

FIG. 3 is a developed plan view of corrugated paper formed by the upper box.

FIG. 4 is an exploded perspective view of a lower box and an upper box.

FIG. 5 is a longitudinal sectional view of a main part when the upper box is inserted into the lower box.

6 is a longitudinal sectional view of a main part of FIG.

FIG. 7 is a longitudinal sectional view of a main part when the upper box is moved upward.

FIG. 8 is a view showing a conventional general cardboard box.

[Explanation of symbols]

 1: Lower box (first box) 1a: Side plate piece 1b: Bottom plate piece 1c: Joining margin 1d: Auxiliary piece 1e: Connecting hole 2: Upper box (second box) 2a: Side plate piece 2b: Top plate piece 2c : Joint margin 2d: Spacer piece 2e: Connecting arm 2f: Engagement head

Claims (1)

[Claims] 1. A first box formed of corrugated paper into a trough and open at one end, and a first box similarly formed of corrugated paper at a trough and open at one end and from the open end of the first box. A second box that can be inserted and removed therein, and an auxiliary piece that can be bent along the inner surface side of the side plate piece that forms the side wall is provided in one of the first box and the second box. In addition, a connecting hole having a substantially uniform opening cross section is opened in the auxiliary piece in the direction of relative movement with respect to the other box, and the connecting hole of one box is formed in the other of the first box and the second box. A connecting arm inserted from the inner surface of the auxiliary piece to the outer surface is provided.An engaging head having a shape wider than the opening width of the connecting hole is provided at the tip of the connecting arm. A cardboard box with a variable volume that is shorter than the depth of the box.