JPH0511149Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a corner connector for a prefabricated box that removably connects side plates that are bendably connected to each edge of a bottom plate. be.

(Prior Art) As described in Japanese Patent Application No. 63-205515 previously filed by the applicant, side plates are bendably connected to each edge of the bottom plate, and opposite edges of each side plate are connected to each other. There is a corner connector for a prefabricated box which is provided with a first connector and a second connector that are removable.

(Problem to be solved by the invention) In the above-mentioned conventional device, by engaging or disengaging the first connector and the second connector, each side plate is made to stand up or extend with respect to the bottom plate. The box can be flattened when not in use, making it convenient to return and store after use.

However, in the above conventional case, when the assembled boxes were brought into contact with each other, their side plates simply touched each other. Due to vibrations, etc., each box moves relative to each other in a direction perpendicular to the direction of contact with each other, causing the cargo to collapse.

In addition, when the boxes were disassembled into flat plates and stacked, the upper and lower boxes would shift sideways relative to each other, resulting in a disadvantage that the boxes could not be stacked high.

SUMMARY OF THE INVENTION The object of the present invention is to provide a new corner connector for a prefabricated box that eliminates the above-mentioned drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention is constructed as follows.

That is, in a corner connector for a prefabricated box, in which a side plate is bendably connected to each edge of a bottom plate, and a first connector and a second connector that are removably connected to each other are provided at opposing edges of each side plate. , at least one of the first connector and the second connector has a large number of protrusions projecting outward and extending in the vertical direction formed on its outer surface at a predetermined pitch in the width direction of the side plate. However, a concave portion having a volume into which the protrusion can be fitted is formed on the inner surface of the one connector at a portion corresponding to the protrusion.

(Function) Since the present invention has the above structure, when each side plate is erected and the first connector and second connector are connected to each other, each side plate is held upright with respect to the bottom plate, forming a box. will be done.

When the assembled boxes are brought close to each other on the sides of the side plates on which the protrusions are formed, the protrusions will engage with each other.

In this case, the respective protrusions engage with each other when moving laterally, but are allowed to move vertically. As a result, the boxes that have approached each other closely approach each other, are prevented from moving relative to the sides perpendicular to the approaching direction, and are allowed to move vertically.

Further, when the boxes are disassembled and the flat plates are stacked, the protrusion of one of the upper and lower boxes will fit into the recess of the other. As a result, the upper and lower parts are prevented from moving relative to each other in the lateral direction (horizontal direction).

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In the drawings, FIG. 1 is a developed plan view of a box showing an embodiment of the present invention, and FIGS. 2 and 3 are sectional views corresponding to those in FIG. 1 when assembled.

In Figures 1 and 2, A is an assembly type box made of plastic made by bendably connecting rectangular side plates 3, 3, 4, 4 to each edge of a rectangular bottom plate 2. Box main body 1, each side plate 3, 3,
4, 4 are attached to the opposing edges of each other and engage with each other.
Detachable first connector 10 and second connector 20
It has the following.

The first connector 10 is integrally molded into a flat plate from a plastic material such as polypropylene, and has the following configuration.

That is, a fitting hole 12 and a hook hole 13 are formed in the lower and upper parts of the engagement edge side of the main body 11.

The fitting hole 12 is elongated in the vertical direction and linearly recessed from the inner surface to the outer surface. By forming it wide in the direction, an engaging claw 13a is formed at the entrance portion.

A thin, tongue-shaped insertion piece 14 is formed to protrude outward from the upper engaging edge of the main body 11 where the hook hole 13 is located, and its connecting base is locally made thin so that the insertion piece 14 can be bent inwardly relative to the main body 11 with this connecting base as the center.

A semicircular plate-shaped locking piece 15 is formed at the center of the insertion piece 14, and the connecting base side is open.

As shown in FIG. 2, this locking piece 15 has an open end 15a protruding outward from the insertion piece 14, and a cam that protrudes inward from the inner surface of the open end 15a. 15b are integrally formed.

In addition, a protrusion 16 and a rectangular recess 11a are formed on the outer and inner surfaces of the main body 11, as shown in FIG.

The protrusions 16 are formed by forming a number of protrusions 16 protruding outward (to the right) on the outer surface of the main body 11 and extending vertically in a comb-like shape at a predetermined pitch in the width direction of the side plate 3.

Further, the recess 11a is formed by recessing the inner surface of the main body 11 corresponding to the projection 16 outward (to the right),
Its depth and cross-sectional area are determined to allow the projection 16 to fit therein.

Further, connecting pieces 17 and 18 are formed on the upper and lower parts of the main body 11 to protrude in the orthogonal direction, and a fitting groove 19 is formed at the corner where the two intersect.

The connecting pieces 17, 18 and the fitting groove 19 form a connecting portion connected to the opposing edge of one side plate 3. Reference numeral 11a denotes a recessed portion formed on the inner surface of the upper side of the main body 11 for thinning.

The second connector 20 described above is integrally formed from the same material as the first connector 10, and has the following configuration.

That is, a guide groove 22 is formed inside the main body 21 and has a rectangular shape when viewed from the front and is open on the engagement edge side.

This guide groove 22 is formed to have an area and width in which the aforementioned insertion piece 14 is loosely fitted.

An elastic piece 23 divided by a pair of upper and lower slits is formed in the vertically intermediate portion of the inner wall of the main body 21 forming the guide groove 22. As shown in FIG. 2, this elastic piece 23 is a hook piece 2 that protrudes outward (to the right) from the main body 21 and bends toward the outer surface of the main body 21.
3a are integrally formed.

The hook piece 23a is made to correspond to the hook hole 13 of the first connector 10 described above, and is formed in a size that allows it to be removably fitted into the hook hole 13.

Further, the main body 2 located below the hook piece 23a
As shown in FIG. 1, a fitting projection 24 is provided on the inner surface of the
protrudes toward the right. This fitting protrusion 24
is formed to correspond to the fitting hole 12 of the first connector 10 described above, and to have a size that allows it to be removably fitted into the fitting hole 12.

In addition, the main body 2 forming the guide groove 22 described above
1. A circular locking hole 25 is made in the center of the outer wall.
This locking hole 25 is connected to the insertion piece 14 of the first connector 10.
The locking piece 15 is formed in such a position and size that the locking piece 15 fits into the guide groove 22 from the inner side when the locking piece 15 is fitted into the guide groove 22 to the deepest extent.

Further, connecting pieces 26 and 27 are formed on the upper and lower parts of the main body 21 to protrude in the orthogonal direction, and a fitting groove 28 is formed at the corner where the two intersect.

The connecting pieces 26, 27 and the fitting groove 28 form a connecting portion connected to the opposing edge of the other side plate 4.

The first connector 10 described above is connected to the opposing edges of one side plate 3 of the box main body 1 in the following manner.

That is, the vertical reinforcing frames 5 and the horizontal reinforcing frames 6 bent in a U-shape are fitted to the opposing edges and the outer edge of the side plate 3 and fixed with rivets 7.
In addition to deleting the intersection of the horizontal reinforcement frame 6, the side plate 3
An L-shaped outer corner corner is removed so as to correspond to the fitting groove 19 of the first connector 10.

Then, the connecting pieces 17, 18 and fitting groove 19 of the first connector 10 are fitted into the ends of each of the vertical reinforcing frames 5 and the horizontal reinforcing frames 6 and the outer peripheral corners of the side plates 3, and both are riveted.

Further, the second connector 20 described above is connected to the opposing edges of the other side plates 4, 4 of the box main body 1 in the following manner.

That is, the vertical reinforcing frames 8 and the horizontal reinforcing frames 9 bent in a U-shape are fitted to the opposing edges and the outer edge of the side plate 4 and fixed with rivets 7, and each of these vertical reinforcing frames 8 and
In addition to deleting the intersection of the horizontal reinforcement frame 9, the side plate 4
The outer peripheral corner portion of is removed stepwise so as to correspond to the fitting groove 28 of the second connector 20.

Then, the connecting pieces 26, 27 and the fitting groove 28 of the second connecting member 20 are fitted into the ends of each of the vertical reinforcing frames 8 and the horizontal reinforcing frames 9 and the outer peripheral corners of the side plates 3, and both are riveted.

Next, the operation mode of the above embodiment will be explained.

The side plates 3 and 4 are stood up, and the insertion piece 14 of the first connector 10 is fitted into the guide groove 22 of the second connector 30.

In this case, as the insertion piece 14 fits into the guide groove 22, the open end 15a of the locking piece 15 is pressed inward by the inner surface of the outer wall of the guide groove 22, and the open end 15a When the cam 15b moves inward, the cam 15b formed on the inner surface of the open end 15a
Therefore, the hook piece 2 gradually moves inward via the elastic piece 23 and comes to face the hook hole 13.

Then, when the insertion piece 14 is fitted into the guide groove 22 deepest and the locking piece 15 faces the locking hole 25,
As shown in FIG. 2, the locking piece 15 is elastically returned to fit and lock in the locking hole 25, and at the same time, the cam 15b is retracted and the elastic piece 23 returns to the outer surface, and the hook piece After 23a is fitted into the hook hole 13, the engaging claw 13
It will engage with a.

At the same time, the fitting protrusion 24 of the second connecting tool 20 fits into the fitting hole 12 of the first connecting tool 10, and thereby,
An assembled box A will be formed. Then, when the assembled boxes A, A are brought close to each other on one side plate 3, 3 side, each protrusion 16,
16 will mesh with each other.

In this case, the projections 16 engage with each other when moving laterally (up and down in FIG. 2), and are allowed to move up and down.

Furthermore, when disassembling, when the locking piece 15 is pressed from the outer surface toward the inner surface, the locking piece 15 passes through the locking hole 25 and through the cam 15b to the hook piece 23.
a is removed from the hook hole 13, and as a result, the connection between the adjacent side plates 3 and 4 is released, and these are connected to the bottom plate 2.
It can be tilted in the direction of extension.

Further, when the boxes A are disassembled and the flat plates are stacked, the protrusion 16 of one of the upper and lower boxes fits into the recess 11a of the other, so that the upper and lower boxes fit into the protrusion 16 and The recesses 11a are engaged with each other to prevent relative movement in the lateral direction (horizontal direction).

(Effects of the invention) As is clear from the above explanation, according to the invention, when assembled, the boxes come close to each other, reducing the installation space, and the boxes are moved to the side perpendicular to the approach direction. Relative movement is prevented, which reduces the installation space when loaded onto a truck and transported, and also prevents the boxes from moving relative to each other in the lateral direction due to vibrations during transportation, which prevents the cargo from collapsing. It has the effect of disappearing.

Furthermore, since the boxes can be moved relative to each other in the vertical direction while being brought close to each other, loading and unloading using a forklift or the like is facilitated.

Also, when the boxes are disassembled and the flat plates are stacked, the upper and lower boxes will be prevented from moving relative to each other in the lateral (horizontal) direction due to engagement with the protrusions and recesses. This has the effect of preventing loads from collapsing even when stacked.

[Brief explanation of the drawing]

FIG. 1 is a developed plan view of a box showing an embodiment of the present invention, and FIGS. 2 and 3 are sectional views corresponding to those in FIG. 1 when assembled. A... Assembly type box, 1... Box main body, 2... Bottom plate, 3, 4... Side plate, 10... First connector, 11
...main body, 11a...recess, 12...fitting hole, 1
3... Hook hole, 13a... Engaging claw, 14... Insert piece, 15... Locking piece, 15a... Open end, 15b
...Cam, 16...Protrusion, 17, 18...Connecting piece, 19...Fitting groove, 20...Second connector, 21
... Main body, 22 ... Guide groove, 23 ... Elastic piece,
23a... Hook piece, 24... Fitting protrusion, 25... Locking hole, 26, 27... Connection piece, 28... Fitting groove.

Claims (1)

[Scope of utility model registration request] In the corner connector of an assembly type box, a side plate is bendably connected to each edge of the bottom plate, and a first connector and a second connector that are removably connected to each other are provided at opposite edges of each side plate. At least one of the first connector and the second connector has a large number of projections protruding outward and extending in the vertical direction formed on its outer surface at a predetermined pitch in the width direction of the side plate; A corner connector for a prefabricated box, characterized in that a recess having a volume into which the protrusion can fit is formed on the inner surface of the one connector at a portion corresponding to the protrusion.