JPH0520663Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a foldable box, and particularly to a foldable box made of flexible materials such as plastic, cloth, or paper.

(Prior art) There was a technology described in Japanese Patent Application Laid-Open No. 173401/1983 filed by the present applicant.

In FIGS. 6 and 7, 1 is a collapsible box made of plastic material, for example polypropylene.

This foldable box 1 has side plates 3 integrally and bendably connected to each side of a bottom plate 2 formed in a rectangular or square shape, and adjacent side plates 3a and 3b are mutually connected at their opposing edges. At the same time, a quarter-disc-shaped gusset board 4 made of the same material is integrally and bendably connected to the opposing edge of one side plate 3a, and the opposing edge wall of the other side plate 3b is divided. An arcuate guide groove 5 into which the gusset plate 4 is slidably fitted is formed in the groove.

The connecting base 4a of the gusset board 4 is locally made thin so that it can be bent around the connecting base 4a, and a circular engagement hole 6 is formed in the center thereof.

Moreover, the other side plate 3b in which the guide groove 5 is formed
An engaging protrusion 7 is formed on the opposing edge wall of the guide groove 4 to be engaged with the engaging hole 6 when the gusset plate 4 is inserted into the guide groove 5 at its deepest position.

This engaging protrusion 7 is connected to the side plate 3 as shown in FIG.
An arc-shaped slit is formed in b to form a semi-disc shape with the right side open, and as shown in FIG. The open end (right end) 7a is made to protrude outward, and the base (left end) 7b is formed thin so that it can be bent inward in the thickness direction with respect to the side plate 3b.

Incidentally, reference numeral 4b is a protrusion formed on the open side end of the gusset plate 4, and is for preventing the gusset plate 4 from coming off from the guide groove 5 in the unfolded state, as shown in FIG.

(Problem to be solved by the invention) The invention of the above application effectively utilizes the functions of flexible materials to reduce the use of other parts as much as possible, so it is highly productive and easy to assemble and disassemble. This has the effect that it can be done quickly.

However, when assembling, each adjacent side plate 3a, 3
Gusset board 4 in which the connection of the opposite edges of b is formed into a thin wall.
Since this was done using the connecting base 4a, there was a drawback that cracks were generated in the connecting base 4a due to external loads when heavy objects were accommodated.

The object of the present invention is to obtain a novel foldable 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, the bottom plate and the side plates are bendably connected using a flexible material, each adjacent side plate is divided at the opposing edge thereof, and a gusset made of the same material is attached to the opposing edge of one side plate. The plates are integrally and bendably connected, a guide groove is formed in the opposite edge wall of the other side plate to slidably fit the gusset plate, and the gusset plate and the opposite edge wall of the other side plate are connected to each other. In a folding box that is provided with an engagement hole and an engagement protrusion that engage with each other from the thickness direction when the gusset board is inserted into the guide groove at its deepest point, one side plate to which the gusset board is connected is connected to the other side plate. A hook-shaped locking tool protruding toward the opposite edge is provided, and the locking tool is engaged with the other side plate from a direction perpendicular to the direction of rotation thereof.

(Function) Since the present invention has the above configuration, when each side plate is bent in a direction perpendicular to the bottom plate (upward) with the gusset board fitted into the guide groove, the gusset board will fit into the guide groove. The engagement protrusion engages and locks into the engagement hole when the opposing edges of the adjacent side plates approach each other, and the locking tool provided on one side plate engages the other side plate during movement. This results in engagement from a direction perpendicular to the direction of rotation.

As a result, the adjacent side plates are bent in a direction perpendicular to the bottom plate and are connected and held together by the base of the gusset plate and the locking tool.

In this state, when the engaging protrusion is bent in the thickness direction, the engaging protrusion is detached from the engaging hole and the locking tool is detached from the other side plate, and the connection between the adjacent side plates is broken. It will be canceled.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In the drawings, Fig. 1 is a partial plan view of an embodiment of the present invention in an expanded state, Fig. 2 is a sectional view thereof, Fig. 3 is a corresponding sectional view of the assembled state, and Fig. 4 is an assembled view. FIG. 5 is a perspective view showing another embodiment.

In FIGS. 1 to 4, the same structural parts as in FIGS. 6 and 7 are given the same reference numerals as in FIGS. 6 and 7, and the explanation thereof will be omitted.

A semicircular engagement protrusion 10 is formed on the outer periphery of the connecting base 4a of the gusset board 4 by an arcuate slit, and the connecting base 4a side is open.

The engaging protrusion 10 has a thin base 10a and is connected to the gusset plate 4 so as to be bendable in the thickness direction, and has a gradually thicker wall from the base 10a toward the open end 10b. The outer end in the thickness direction is made to protrude outward in the thickness direction from the outer surface of the gusset board 4, as shown in FIG.

Further, as shown in FIG. 3, when the gusset plate 4 is fitted into the guide groove 5 most deeply, the engaging protrusion 10 is fitted into the guide groove outer wall 3c forming the guide groove 5 of the other side plate 3b. A circular engagement hole 11 is formed.

A locking tool 12 is integrally formed on one side plate 3a and protrudes from the outer end of the connecting base 4a of the gusset board 4.

This locking tool 12 has its tip 12a bent into a hook shape, and as shown in FIG. It is made to fit into the tip portion 12a.

The locking tool 12 is attached to the connecting base 4a of the gusset board 4, as shown by the imaginary line in FIG.
One or more locking devices 12' similar to the above may be provided.

Further, as shown in FIG. 5, the guide groove 5' is extended to the upper part of the gusset plate 4,
The tip portion 12a of the locking tool 12 may be fitted into the upper portion of the locking tool 12.

Next, the manner of use of the above embodiment will be explained.

From the state shown in FIG. 1, each side plate 3a, 3b is bent upward around each connecting edge.

As the bending angle increases, the gusset board 4 will fit deeper into the guide groove 5, and each three
When the side plates a and 3b stand up in a direction perpendicular to the bottom plate 2 (upward), the gusset plate 4 fits into the guide groove 5 deepest, and thereby the adjacent side plates 3a and 3b
Each opposing edge of is proximate to each other.

In this case, as the gusset plate 4 is fitted into the guide groove 5, the engagement protrusion 10 is inserted into the guide groove outer wall 3c.
is pressed and deformed inwardly by the inner surface of the gusset board 4.
When the engagement protrusion 10 faces the engagement hole 11 when the guide groove 5 is inserted into the guide groove 5 most deeply, the engagement protrusion 10 elastically returns to fit and lock in the engagement hole 11.

At the same time, the locking tool 12 engages with one side plate 3b from the outside perpendicular to the direction of rotation thereof.

As a result, the adjacent side plates 3a and 3b are held in a state bent in mutually orthogonal directions by the connecting base 4a base of the gusset plate 4 and the locking tool 12, and the fourth
As shown in the figure, a rectangular parallelepiped assembly box A with an open top surface is formed, and parts and the like can be stored in the assembly box A.

In this case, the gusset board 4 is mainly one side board 3a.
In addition, the locking tool 12 mainly prevents the other side plate 3b from expanding, thereby increasing the connection strength between the adjacent side plates 3a and 3b.

Next, when disassembling (expanding) the assembly box A into a flat plate, the engagement protrusion 10 is pushed inward from the outside to separate it from the engagement protrusion 10, and in this state, each side plate 3a, 3b is If it is rotated outward with respect to the bottom plate 2, the whole becomes flat as shown in FIG. 1, and the space required for transportation or storage is reduced.

In addition, in the present invention, each of the side plates 3a, 3b and the bottom plate are formed from the same material using separate molds, and
A hook may be formed in one of the connecting portions, and an engaging shaft that rotatably engages with the hook may be formed in the other connecting portion, and the hook may be press-fitted into the engaging shaft for engagement.

(Effects of the invention) As is clear from the above explanation, according to the invention, the functions of flexible materials are effectively utilized to reduce the use of other parts as much as possible, resulting in high productivity and Assembling and disassembling operations can be performed quickly, and the rigidity during assembly is increased.

[Brief explanation of the drawing]

Fig. 1 is a partial plan view of an embodiment of the present invention in an unfolded state, Fig. 2 is a sectional view thereof, Fig. 3 is a corresponding sectional view of the assembled state, and Fig. 4 is a partial plan view of the assembled state. FIG. 5 is a perspective view showing another embodiment, FIG. 6 is a partial plan view of a conventional example in an unfolded state, and FIG. 7 is a sectional view corresponding to FIG. 3 in an assembled state. 1...Foldable box, 2...Bottom plate, 3...Side plate,
3a...one side plate, 3b...other side plate, 3c
... Guide groove outer wall, 4 ... Gull board, 4a ... Connection base, 4b ... Protrusion, 5 ... Guide groove, 10 ...
Engagement protrusion, 10a... base, 10b... open end,
DESCRIPTION OF SYMBOLS 11... Engagement hole, 12... Locking tool, 12a... Tip part, A... Assembly box.

Claims (1)

[Scope of utility model registration request] The bottom plate and the side plates are connected in a bendable manner using a flexible material, each adjacent side plate is divided at the opposite edge thereof, and a gusset board made of the same material is attached to the opposite edge of one side plate. a guide groove integrally and bendably connected to the opposing edge wall of the other side plate in which the gusset board is slidably fitted; In a folding box that is provided with an engaging hole and an engaging protrusion that engage with each other from the thickness direction when the plate is inserted into the guide groove at its deepest point, one side plate to which the gusset plate is connected has an opposing edge of the other side plate. 1. A folding box characterized in that a hook-shaped locking tool that projects in the direction is provided, and the locking tool is engaged with the other side plate from a direction perpendicular to the direction of rotation of the locking tool.