JP2020006990A - Storage box - Google Patents

Abstract

To provide a foldable storage box which surely holds a stored article by preventing a box bottom part from falling even when the stored article comprising a heavy object is stored in an article storage space and carried, and which exhibits shape retention properties of the entire storage box.SOLUTION: In a foldable storage box 100, a bottom surface front flap 111 includes an insertion piece 111d which can be folded toward an article storage space A by cutting and raising a part of the bottom surface front flap 111, and a bottom surface rear flap 141 includes a locking slit 141c which is lockable by inserting the insertion piece 111d of the bottom surface front flap 111 by cutting out a part of the bottom surface rear flap 141.SELECTED DRAWING: Figure 5

Description

  According to the present invention, a rectangular front panel, a left side panel, a right side panel, and a rear panel form a box frame body that integrally configures an article accommodating space, and a bottom front surface that is continuous through a bottom side of the front panel. A bottom side left flap continuous through the bottom of the flap and the left side panel and a bottom side right flap continuous through the bottom of the right side panel and a bottom rear flap continuous through the bottom of the back panel in the article storage space. TECHNICAL FIELD The present invention relates to a foldable storage box which is folded in a state of being assembled with each other and closing a bottom opening of an article storage space.

  Conventionally, as a box having a bottom wall from which the bottom does not easily come off even when a heavy object is put in, the bottom wall of the box has a cutout portion connected to the bottom and substantially parallel to the bottom. A first lid for closing the first lid, a first flap for inserting the protruding portion into the notch when overlapping the first lid, and a second flap for inserting the protruding portion into the notch when overlapping the first lid. A concave portion is provided at a position connecting the head and the inclined side to the second flap, and the head is inserted into the cutout portion when overlapping the first lid, and the concave portion is engaged with the protruding portions of the first and second flaps. There is known a device having a second lid that performs the operation (for example, Patent Document 1).

JP-A-10-297628

In the bottom wall of the box described in Patent Literature 1, the protrusion of the first flap, the protrusion of the second flap, and the head of the second lid are inserted into the notch of the first lid. However, there is a problem in that, when storing and carrying a heavy article in the article storage space and carrying the article, it is impossible to hold the stored article because the box bottoms out.
Therefore, when storing and carrying the stored articles in the box, the box bottom of the box is glued, a bottom plate is laid on the box bottom, or the box bottom is reinforced with a metal fitting such as a pin. There was an annoying problem of having to hold the contained items.

  Therefore, the present invention is to solve the above-mentioned problems of the prior art. That is, the object of the present invention is to provide a box even if a heavy article is stored in the article storage space and carried. An object of the present invention is to provide a foldable storage box that suppresses a bottom of the storage box and securely holds the storage box, and exhibits shape retention of the storage box as a whole.

  The invention according to claim 1 is such that a box frame constituting an article storage space is formed integrally with a rectangular front panel, a left side panel, a right side panel, and a back panel, and through a bottom of the front panel. The bottom side continuous through the front flap and the bottom side of the left side panel and the bottom side continuous through the bottom side of the left side panel and the bottom side of the right side panel and the bottom side continuous through the bottom side of the back panel In a storage box in which a rear flap and a rear flap are folded together toward the article storage space and assembled together to close a bottom opening of the article storage space, the bottom front flap includes a part of the bottom front flap. The bottom rear flap has a cut-out portion that can be bent toward the article storage space, and the bottom rear flap is formed by cutting out a part of the bottom rear flap. By having a locking slit to be freely engaging insert the inserting piece of the front flap is intended to solve the aforementioned problems.

  According to a second aspect of the present invention, in addition to the configuration of the storage box described in the first aspect, the insertion piece of the bottom front flap is configured such that a part of the bottom front flap faces a bottom of the front panel. The above-mentioned problem is solved by being formed so as to be able to be raised and lowered so as to be freely raised and lowered, and the direction in which the insertion piece is locked to the locking slit is opposite to the direction in which the bottom rear flap is attached to the bottom front flap. It is a further solution.

  According to a third aspect of the present invention, in addition to the configuration of the storage box described in the first or second aspect, the bottom left side flap and the bottom right side flap close a bottom opening of the article storage space. The above-mentioned problem is further solved by contacting the insertion piece from above the insertion piece in the above state.

  According to a fourth aspect of the present invention, in addition to the configuration of the storage box described in any one of the first to third aspects, the storage box is bent toward the article storage space continuously on the upper side of the front panel. A front upper reinforcing panel, a front interior panel continuously folded into the article storage space on the upper side of the front upper reinforcement panel, and a bottom restraint folded on the bottom of the article storage space continuously on the upper side of the front interior panel. And a bottom piece, which is sandwiched by the bottom left side flap and the bottom right side flap and the insertion piece in a state where the bottom opening of the article storage space is closed, It is intended to further solve the above-mentioned problem.

  According to a fifth aspect of the present invention, in addition to the configuration of the storage box according to any one of the first to fourth aspects, the storage box is formed of an elastically deformable hard plastic sheet. Is further solved.

  In the foldable storage box of the present invention, a box frame constituting an article storage space is formed integrally and integrally with a rectangular front panel, a left side panel, a right side panel, and a back panel, and a bottom side of the front panel is formed. The bottom flap continuous through the bottom front flap and the bottom side of the left side panel and the bottom side flap continuous through the bottom of the right side panel and the bottom side of the rear panel It is necessary to glue the bottom of the box or lay a bottom plate on the bottom of the box by closing the bottom opening of the article storage space by assembling them together in a state where they are bent toward the article storage space. In addition, it is possible to store and hold the stored articles in the article storage space, and to obtain the following effects unique to the present invention.

  According to the storage box of the invention according to claim 1, the bottom front flap has an insertion piece that cuts and raises a part of the bottom front flap and can be bent toward the article storage space. Since the bottom rear flap has a locking slit which can be inserted into the bottom rear flap and cut into a part of the bottom rear flap, the bottom front flap can be inserted and locked. It is inserted into the locking slit and locked, and as a result, it has a function of preventing the box bottom composed of the bottom front flap, the bottom left side flap, the bottom right side flap, and the bottom rear flap from functioning as a storage article. Even if the container is stored in the article storage space and carried, the bottom of the box bottom can be prevented from coming off, and the shape of the entire storage box can be maintained.

  According to the storage box of the invention according to claim 2, in addition to the effect of the storage box of the invention according to claim 1, the insertion piece of the bottom front flap has a part of the bottom front flap at the bottom of the front panel. The insertion flap is formed so that it can be raised and lowered in the shape of a claw, and the direction in which the insertion piece engages with the engagement slit is opposite to the direction in which the bottom flap is attached to the bottom flap. Even if force acts on the bottom rear flap and the bottom front flap in the direction to release the assembly with the bottom front flap, the insertion piece is securely locked in the state inserted into the locking slit Since it is difficult for the box to fall out, it is possible to reliably prevent the box bottom from slipping off even when a heavy article is stored in the article storage space.

  According to the storage box according to the third aspect of the invention, in addition to the effect of the storage box according to the first or second aspect, the bottom left side flap and the bottom right side flap are located at the bottom of the article storage space. By contacting the insertion piece from above the insertion piece in a state where the opening is closed, the insertion piece is placed on the bottom left side flap and the bottom right side flap when the articles are stored in the article storage space. And the front flap at the bottom contact the surface in a state of contact, and the degree of contact between them is increased, so that the pull-out resistance of the insertion piece with respect to the locking slit is generated, and the excellent shape retention of the box bottom can be exhibited. it can.

According to the storage box of the invention according to claim 4, in addition to the effect of the storage box of any one of claims 1 to 3, the article storage space is continuous with the upper side of the front panel. The front upper end reinforcing panel which is bent toward the front interior panel which is continuously folded into the article storage space on the upper side of the front upper end reinforcement panel, and is continuously folded on the upper side of the front interior panel at the bottom of the article storage space By further providing the bottom holding piece, the front side and the bottom side of the storage box are reinforced in a double structure, so that when the stored articles are stored in the article storage space, the entire storage box is distorted. Even better shape retention can be exhibited without deformation.
Further, the bottom holding piece is sandwiched between the bottom left side flap and the bottom right side flap and the insertion piece in a state where the bottom opening of the article storage space is closed. When housed in the space, the bottom left side flap and the bottom right side flap press the insertion piece against the front bottom flap via the bottom holding piece in the face contact state, and the degree of contact between them increases. In addition, pull-out resistance of the insertion piece with respect to the locking slit is generated, so that the bottom of the box bottom can be further avoided.

According to the storage box according to the fifth aspect of the invention, in addition to the effect of the storage box according to any one of the first to fourth aspects, the storage box is formed of an elastically deformable hard plastic sheet. As a result, compared to the case where the storage box is made of corrugated cardboard or the like, even if the storage box is thin, it exhibits excellent box strength and shape retention, so that it is possible to more reliably hold the storage article. Rather, the rigid plastic sheet is elastically deformed when assembling or disassembling the bottom of the box consisting of the bottom front flap, bottom left side flap, bottom right side flap, and bottom rear flap, making assembly and disassembly easy Can be achieved.
Furthermore, since the locking slit and the insert are made of a plastic sheet that is harder than corrugated cardboard, etc., they exhibit robust shape retention even if the friction coefficient between the hard plastic sheets is small, and can be used as a storage article. On the other hand, since it is difficult for the bottom to fall out, it is possible to reliably hold even a stored article made of a heavy material.

The perspective view of the storage box which is an example of the present invention. The bottom view of the storage box shown in FIG. FIG. 2 is a development view of the storage box shown in FIG. 1. FIG. 2 is an explanatory view of a procedure for closing a bottom opening of the storage box shown in FIG. 1. FIG. 2 is an explanatory view of a procedure for closing a bottom opening of the storage box shown in FIG. 1. FIG. 2 is an explanatory view of a procedure for closing a bottom opening of the storage box shown in FIG. 1. FIG. 2 is an explanatory view of a procedure for closing a bottom opening of the storage box shown in FIG. 1. FIG. 4 is an explanatory view of an assembling procedure of a bottom holding piece and a bottom side flap shown in FIG. 3. FIG. 4 is an explanatory view of an assembling procedure of a bottom holding piece and a bottom side flap shown in FIG. 3. FIG. 4 is an explanatory view of an assembling procedure of a bottom holding piece and a bottom side flap shown in FIG. 3. IX-IX sectional drawing of FIG. XX sectional drawing of FIG. The schematic diagram which shows the deformation | transformation state in the box bottom part of the storage box which is an Example of this invention. The schematic diagram which shows the deformation state in the box bottom part of the storage box which is the comparative example of this invention.

  According to the present invention, a rectangular front panel, a left side panel, a right side panel, and a rear panel form a box frame body that integrally configures an article accommodating space, and a bottom front surface that is continuous through a bottom side of the front panel. A bottom side left flap continuous through the bottom of the flap and the left side panel and a bottom side right flap continuous through the bottom of the right side panel and a bottom rear flap continuous through the bottom of the back panel in the article storage space. In a storage box in which the bottom opening of the article storage space is closed by being assembled with each other in a state of being folded toward the bottom, the front bottom flap cuts and raises a part of the bottom front flap and is bent toward the article storage space side. A locking slit for inserting and locking the insertion piece of the bottom front flap by cutting out a part of the bottom rear flap By having, even when carrying heavy articles stored in the article storage space and carrying them, the bottom of the box bottom is prevented from falling out and it is securely held, and the shape of the entire storage box is exhibited. If so, any specific embodiment may be used.

  For example, regarding the material of the storage box, a polypropylene resin plate, an ABS (acrylonitrile-butadiene-styrene) resin plate, a PET (polyethylene terephthalate) resin plate, a polycarbonate resin plate, a polyvinyl chloride resin plate, a polyethylene resin plate, a polyamide resin plate Although it is preferable that the plastic sheet is an elastically deformable hard plastic sheet, etc., any plastic sheet that can be bent easily by simply forming a bending groove necessary for forming a storage box, other than the above-described hard plastic sheet, is used. It may be a material.

  Hereinafter, a storage box according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11B.

<1. Structure of storage box>
First, a storage box 100 according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view of a storage box according to an embodiment of the present invention, FIG. 2 is a bottom view of the storage box shown in FIG. 1, and FIG. 3 is a developed view of the storage box shown in FIG. .

A storage box 100 according to an embodiment of the present invention has a rectangular parallelepiped shape as shown in FIG. 1, and as shown in FIG. 3, a box frame 100A constituting an article storage space and the box frame 100A is reinforced. It is assembled with a stick-shaped assembly reinforcing member 150 and two members.
Then, the box frame 100A and the assembling reinforcing member 150 are cut out from a hard plastic sheet S made of a polypropylene resin plate as a single blank sheet material.
As a result, compared to the case where the storage box 100 is made of corrugated cardboard or the like, not only is the box strength and shape retention increased even if the storage box is thin, but the rigid plastic sheet is elastically deformed when the storage box 100 is assembled or disassembled. In addition, assembling work and dismantling work are simplified.

<2.1. Box Frame>
First, the box frame 100A will be described with reference to FIGS.
The box frame 100A includes a rectangular front panel 110, a rectangular left side panel 120 continuous via a left side 110a of the front panel 110, and a rectangular right side continuous via a right side 110b of the front panel 110. A front panel 130 and a back panel 140 which is continuous via the right side 130a of the right side panel 130 are provided. These four panels are integrated in a series to form a rectangular parallelepiped article accommodating space A (FIGS. 4, 8C, etc.). Reference).

<2.1.1. Front panel>
First, a rectangular front panel 110 and members vertically adjacent to the front panel 110 will be described with reference to FIGS.
Near the upper center of the front panel 110, an inverted trapezoidal opening 110c is formed.

The bottom 110d of the front panel 110 is adjacent to a concave bottom front flap 111 that is continuous through the bottom 110d.
The bottom front flap 111 has a rectangular portion 111a adjacent to the bottom 110d of the front panel 110, and two rectangular projecting portions 111b projecting from the left and right ends and the lower end of the rectangular portion 111a.
That is, the recessed region 111c is formed in the bottom front flap 111 by these two protruding portions 111b, and has a concave flap shape.
The rectangular portion 111a is formed with an insertion piece 111d which is cut out like a nail toward the bottom 110d of the front panel 110 and can be raised and lowered.
In the present embodiment, the “claw shape” refers to a horizontally long trapezoidal shape as shown in FIG. 3, but if it can be locked at least in the locking slit 141 c of the bottom rear flap 141 described later, The shape, aspect ratio, and the like of the tip portion may be any.

In addition, the upper edge 110e of the front panel 110 is connected to a belt-shaped front upper end reinforcing panel 112 which is continuous through the upper edge 110e.
A rectangular front interior panel 113 which is continuous through the upper side 112a is connected to the upper side 112a of the front upper end reinforcing panel 112.
A rectangular bottom holding piece 114 is connected adjacent to the upper side 113a of the front interior panel 113.
The left and right widths of the front panel 110, the front upper reinforcing panel 112, the front interior panel 113, and the bottom holding piece 114 are substantially equal.
Of these four panels, the one having the shortest vertical width is the front upper end reinforcing panel 112, and the vertical width of the front panel 110 is substantially equal to the vertical width of the front interior panel 113. Has become.
The vertical width of the bottom surface retaining piece 114 is shorter than the vertical width of the front panel 110.

<2.1.2. Left side panel>
Next, the left side panel 120 and members adjacent to the periphery of the left side panel 120 will be described with reference to FIGS.

The bottom side 120a of the left side panel 120 is adjacent to the bottom left side flap 121 that is continuous through the bottom side 120a.
The bottom left side flap 121 has an inclined side 121a on the right side (bottom front flap 111 side) in FIG. 3 which is a developed view, and the width in the up-down direction is narrowed downward.
The bottom left side flap 121 has a tongue portion 121b protruding from the inclined side 121a.

  The upper side 120b of the left side panel 120 is adjacent to a rectangular top surface left side flap 122 continuous through the upper side 120b.

A trapezoidal folded piece 123 that is continuous through the left side 120c is adjacent to the left side 120c of the left side panel 120.
Further, an insertion slit 124 disposed above the left side 120c and an insertion slit 125 disposed below the left side 120c of the left side panel 120 are formed on the left side 120c.

<2.1.3. Right side panel>
Next, the right side panel 130 and members vertically adjacent to the right side panel 130 will be described with reference to FIGS.

The bottom side 130b of the right side panel 130 is adjacent to a bottom right side flap 131 that is continuous through the bottom side 130b.
The bottom right side flap 131 has an inclined side 131a on the left side (bottom front flap 111 side) in FIG. 3 which is a developed view, and the width in the vertical direction decreases downward.
The bottom right side flap 131 has a tongue portion 131b projecting from the inclined side 131a.

  The upper side 130c of the right side panel 130 is adjacent to a rectangular top right side flap 132 that is continuous through the upper side 130c.

<2.1.4. Back panel>
Next, the rear panel 140 and members adjacent to the periphery of the rear panel 140 will be described with reference to FIGS.

A trapezoidal bottom rear flap 141 that is continuous through the bottom 140a is adjacent to the bottom 140a of the back panel 140.
The bottom rear flap 141 has a trapezoidal base portion 141a adjacent to the bottom side 140a of the back panel 140, and a rectangular projecting portion 141b projecting from the lower end of the base portion 141a.
In the vicinity of the center of the left and right of the protruding portion 141b, a round and elongated locking slit 141c is formed.
The width in the vertical direction of the locking slit 141c is larger than the thickness of the insertion piece 111d of the bottom front flap 111.

Further, a rectangular top panel 142 that is continuous via the upper side 140b is adjacent to the upper side 140b of the rear panel 140.
A rectangular top flap 143 that is continuous via the top side 142a is adjacent to the top side 142a of the top panel 142.
Near the left and right center of the top surface flap 143, an insertion holding piece 143b that is cut out toward the upper side 143a of the top surface flap 143 and that can freely rise and fall is formed.
The widths of the rear panel 140, the top panel 142, and the top flap 143 in the left-right direction are all equal.

On the right side 140c of the back panel 140, a trapezoidal insertion tongue 144 disposed above the right side 140c and a trapezoidal insertion tongue 145 disposed below the right side 140c are formed.
Further, a locking slit 144a is formed at the base end (on the right side 140c) of the insertion tongue piece 144.
Similarly, a locking slit 145a is formed at the base end (on the right side 140c) of the insertion tongue piece 145.

<2.1.5. Canopy structure and bottom lid structure>
An upper opening having a rectangular cross section of the article accommodating space A surrounded by the front panel 110, the left side panel 120, the right side panel 130, and the back panel 140 is a plug holding piece of the top panel 142 serving as a canopy. The top panel 142 is closed by inserting the 143b into the trapezoidal opening 110c formed in the front panel 110.
On the other hand, the bottom opening O (see FIG. 4 and the like) having a rectangular cross-section of the article storage space A connects the bottom front flap 111, the bottom left side flap 121, the bottom right side flap 131, and the bottom rear flap 141 to the article storage space A. The four flaps are assembled in a state where they are bent toward each other and locked by locking these four flaps, thereby forming a so-called bottom lid.
The procedure for closing the bottom opening O having a rectangular cross section of the article storage space A will be described later in detail.

<2.2. Assembling reinforcement member>
As shown in FIG. 3, the assembling reinforcing member 150 includes a vertically elongated rod-shaped body 151 along an assembling line L between the left side panel 120 and the back panel 140 of the box frame 100A, and the rod-shaped body 151. And a trapezoidal locking tongue piece 153 disposed below the rod-shaped main body 151.

<3. Assembling the storage box>
Next, an assembling procedure of the storage box 100 according to the present embodiment will be described with reference to FIGS.
4 to 7 are explanatory views of a procedure for closing the bottom opening of the storage box shown in FIG. 1, and FIGS. 8A to 8C are diagrams of an assembling procedure of the bottom holding piece and the bottom side flap shown in FIG. FIG. 9 is a sectional view taken along line IX-IX of FIG. 2, and FIG. 10 is a sectional view taken along line XX of FIG.

<3.1. Forming an article storage space>
First, the above-described box frame 100A and the assembling reinforcing member 150 are cut out from a hard plastic sheet S made of a polypropylene resin plate as a single blank sheet material.
Then, the left side 110a and the right side 110b of the front panel 110, the left side 120c of the left side panel 120, the right side 130a of the right side panel 130, and the right side 140c of the back panel 140 can be folded in advance toward the inside of the box frame 100A. The V-shaped groove is formed as described above.

After the front panel 110, the left side panel 120, the right side panel 130, and the back panel 140 are bent perpendicularly to each other in a state where such a V-shaped groove is formed by molding, the upper part of the left side panel 120 is formed. The insertion tongue piece 144 arranged at the upper part of the rear panel 140 is inserted into the arranged insertion slit 124, and the insertion tongue piece arranged at the lower part of the rear panel 140 is inserted into the insertion slit 125 arranged at the lower part of the left side panel 120. Insert 145.
In this manner, the front panel 110, the left side panel 120, the right side panel 130, and the back panel 140 are configured so as to integrally surround the article storage space A having a rectangular cross section.

Further, in the storage box 100 of this embodiment, the upper locking tongue piece 152 arranged on the assembly reinforcing member 150 is inserted into the locking slit 144a of the upper insertion tongue piece 144 arranged on the back panel 140, and assembled. The lower locking tongue piece 153 arranged on the reinforcing member 150 is inserted into the locking slit 145 a of the lower insertion tongue piece 145 arranged on the back panel 140.
Thereby, the engagement between the left side panel 120 and the rear panel 140, that is, the connection form between the left side panel 120 and the rear panel 140 is further strengthened, and the storage box 100 is firstly configured as shown in FIG. This is a state where the box frame 100A is configured.

<3.2. Blockage of bottom opening of storage box>
Subsequently, a procedure for closing the bottom opening O of the storage box 100 will be described with reference to FIGS. 2 and 4 to 7.

  That is, from the state where the box frame 100A shown in FIG. 4 is configured, the bottom 110d of the front panel 110 is bent, and the bottom front flap 111 is folded toward the article accommodating space A, so that the closed state shown in FIG.

Next, the bottom side 120a of the left side panel 120 is bent and the bottom left side flap 121 is folded toward the article storage space A from the closed state of FIG.
At this time, the tongue portion 121b of the bottom left side flap 121 is inserted into the concave region 111c of the bottom front flap 111.
Similarly, the bottom side 130b of the right side panel 130 is bent, and the tongue portion 131b of the bottom right side flap 131 is inserted into the concave region 111c of the bottom front flap 111.
As a result, a closed state as shown in FIG. 6 is obtained, and the tongue portion 121b of the bottom left side flap 121 and the tongue portion 131b of the bottom right side flap 131 are arranged inside the bottom front flap 111.
The order of bending the left side panel 120 and the right side panel 130 may be reversed.

Next, from the closed state in FIG. 6, the bottom 140 a of the rear panel 140 is bent, and the protruding portion 141 b of the bottom rear flap 141 is inserted into the concave region 111 c of the bottom front flap 111.
As a result, a closed state as shown in FIG. 7 is obtained, and the protruding portion 141b of the bottom rear flap 141 is formed by the rectangular portion 111a of the bottom front flap 111, the tongue portion 121b of the bottom left side flap 121, and the tongue of the bottom right side flap 131. It is sandwiched between the portion 131b.

Next, the insertion piece 111d formed on the bottom front flap 111 is bent toward the article storage space A and inserted into the locking slit 141c of the bottom rear flap 141.
As a result, a closed state as shown in FIG. 2 is obtained, and the insertion piece 111 d of the bottom front flap 111 is attached to the base end portion 141 a of the bottom rear flap 141, the tongue portion 121 b of the bottom left side flap 121, and the bottom right side flap 131. Between the tongue portions 131b.
Therefore, the bottom left side flap 121 and the bottom right side flap 131 abut on the insertion piece 111d from above the insertion piece 111d of the bottom front flap 111 in a state where the bottom opening O of the article storage space A is closed. When the accommodated articles M are accommodated in the article accommodating space A (see FIG. 11A), the insertion pieces 111d of the bottom front flaps 111 are in surface contact with the bottom left side flaps 121, the bottom right side flaps 131, and the bottom front flaps 111. And the degree of contact between them increases.

  As described above, the bottom opening O of the article storage space A is formed by bending the bottom front flap 111, the bottom left side flap 121, the bottom right side flap 131, and the bottom rear flap 141 toward the article storage space A. It is closed by assembling them in a locked state and locking them.

<3.3. Engagement of bottom holding piece and bottom side flap>
8A to 8C and FIG. 10, the engagement between the bottom holding piece 114 of the storage box 100 and the bottom side flap (bottom left side flap 121 and bottom right side flap 131) will be described.

  First, from the state of FIG. 8A, the upper side 110e of the front panel 110, the upper side 112a of the front upper end reinforcing panel 112, and the upper side 113a of the front interior panel 113 are bent to form the front interior panel 113 and the bottom holding piece 114 into an article. It folds toward the accommodation space A to make the state of FIG. 8B.

Then, the tongue portion 121b of the bottom left side flap 121 and the tongue portion 131b of the bottom right side flap 131 are turned up, and the tongue portion 121b of the bottom left side flap 121, the tongue portion 131b of the bottom right side flap 131, and the bottom front flap 111 are provided. The bottom holding piece 114 is inserted between the insertion piece 111d and the protruding portion 141b of the rear panel 140.
As a result, the state as shown in FIG. 8C, FIG. 9, and FIG. 10 is obtained, and the front side and the bottom side of the storage box 100 are reinforced with a double laminated structure.
In addition, the bottom holding piece 114 is pressed by the bottom left side flap 121 and the bottom right side flap 131 and the insertion piece 111 d of the bottom front flap 111 in a state where the bottom opening O of the article storage space A is closed.
Thus, when the stored articles M are stored in the article storage space A (see FIG. 11A), the bottom left side flap 121 and the bottom right side flap 131 are inserted into the bottom front flap 111 via the bottom holding piece 114. The piece 111d is pressed against the front bottom flap 111 in a surface contact state, so that the degree of contact between them increases.

<4. Comparison of the direction in which the insertion piece is locked to the locking slit and the direction in which the bottom flap is attached to the bottom flap>
In the present embodiment, the assembling direction D1 of the bottom rear flap 141 with respect to the bottom front flap 111 (see FIGS. 6 and 10) is formed in the bottom front flap 111 with respect to the locking slit 141c formed in the bottom rear flap 141. The locking direction D2 of the insertion piece 111d is opposite to the locking direction D2 (see FIG. 10 and the like).
Thus, even if a force acts on the bottom rear flap 141 and the bottom front flap 111 in a direction in which the bottom rear flap 141 and the bottom front flap 111 are released, the insertion piece formed on the bottom front flap 111 111d is securely locked in a state where it is inserted into the locking slit 141c formed in the bottom rear flap 141, so that it is difficult to come off.
This will be described in detail with reference to FIGS. 11A and 11B.

FIG. 11A is a schematic diagram illustrating a deformed state of the box bottom when the storage article M is stored in the storage box 100 of this embodiment. FIG. 11B is a schematic view illustrating the storage article M in a storage box 200 according to a comparative example of the present invention. FIG. 9 is a schematic diagram showing a deformed state of the box bottom when the box is accommodated.
The storage box 200 of the comparative example is different from the storage box 100 of the embodiment of the present invention in that the mounting direction of the bottom rear flap 241 with respect to the bottom front flap 211 and the locking slit 241 c formed in the bottom rear flap 241. All are common except that the relationship with the locking direction of the insertion piece 211d formed on the bottom front flap 211 is reversed.
That is, in the storage box 200 of the comparative example, the attachment direction D1 of the bottom rear flap 241 with respect to the bottom front flap 211 is such that the insertion piece 211d formed in the bottom front flap 211 with respect to the locking slit 241c formed in the bottom rear flap 241. In the same direction as the locking direction D2.

As shown in FIG. 11A, when a storage article M made of a heavy material is stored in the storage box 100 of the present embodiment, the box bottom of the storage box 100 is bent by the load W caused by the storage article M.
More specifically, the load W due to the accommodated articles M is applied to the bottom surface pressing piece 114, and the load W is also applied to the protruding portion 141b of the bottom rear flap 141 that comes into contact with the bottom surface pressing piece 114.
As a result, the bottom rear flap 141 flexes downward, and the bottom rear flap 141 rotates toward the rear panel 140 side.
Here, the moving direction of the bottom rear flap 141 is D3, and when the bottom rear flap 141 attempts to move in the D3 direction, the insertion piece 111d of the bottom front flap 111 is inserted into the locking slit 141c of the bottom rear flap 141. Therefore, the insertion piece 111d of the bottom front flap 111 is hooked on the locking slit 141c of the bottom rear flap 141.
At this time, in the storage box 100 according to the embodiment of the present invention, since the insertion piece 111d of the bottom front flap 111 also moves in the D3 direction, the insertion piece 111d of the bottom front flap 111 is eventually engaged with the bottom rear flap 141. The locking relationship with the stop slit 141c is maintained.
Therefore, the bottom front flap 111 cannot be removed from the bottom rear flap 141.
That is, since the bottom rear flap 141 has the locking slit 141c, the insertion piece 111d of the bottom front flap 111 is inserted into the locking slit 141c of the bottom rear flap 141 and locked. The box bottom portion formed by the bottom front flap 111, the bottom left side flap 121, the bottom right side flap 131, and the bottom rear flap 141 has a function of retaining the box.

On the other hand, as shown in FIG. 11B, in the storage box 200 which is a comparative example of the present invention, the load W due to the stored article M is applied to the bottom holding piece 214, and the protruding portion of the bottom rear flap 241 via the bottom holding piece 214. A load W is also applied to 241b.
As a result, the bottom rear flap 241 bends downward, and the bottom rear flap 241 rotates toward the rear panel 240.
When the bottom rear flap 241 attempts to move in the D3 direction, the bottom rear flap 241 slides above the insertion piece 211d of the bottom front flap 211, so that the insertion piece 211d of the bottom front flap 211 is The locking relationship between the flap 241 and the locking slit 241c is released.
Therefore, the bottom front flap 211 comes off the bottom rear flap 241.

<5. Modification>
As described above, the storage box of the present invention has been specifically described. However, the storage box of the present invention is not limited to the above, and a specific form of the storage box can be modified without departing from the gist thereof.

For example, in the present embodiment, when the width (L), the depth (D), and the height (H) of the storage box 100 are determined as shown in FIG. 1, these relationships are L>D> H. However, the relationship is not limited to this, and for example, a relationship of L>H> D may be used.
As for the magnitude relationship between the vertical width of the bottom panel 114 and the vertical width of the front panel 110, if the bottom rear flap 114 can be engaged with the bottom side flap, the relationship of the present embodiment (the bottom panel 114 The width in the vertical direction is shorter than the width in the vertical direction of the front panel 110).

  For example, in the present embodiment, the installation positions of the insertion tongue pieces formed on the rear panel 140 and the insertion slits of the corresponding left side panel 120 are two upper and lower positions, but are not limited thereto. For example, if the storage box 100 has a shallow bottom, the number may be one, and if the storage box 100 is a deep bottom, the number may be three at the top, middle, and bottom.

  For example, in this embodiment, the installation positions of the locking tongue formed on the assembly reinforcing member 150 and the corresponding locking slit of the back panel 140 are the same as the insertion tongue formed on the back panel 140 described above. Although two upper and lower positions are set according to the installation position of the corresponding left side panel 120 with the insertion slit, the present invention is not limited to this. For example, when the storage box 100 is shallow, If the storage box 100 is located at a deep bottom, there may be three locations: upper, middle, and lower.

<6. Effect of the present embodiment>
According to the storage box 100 of the present embodiment described above, the bottom front flap 111 has the insertion piece 111d that cuts and raises a part of the bottom front flap 111 and is bent toward the article storage space A. Since the rear flap 141 has a locking slit 141c that cuts out a part of the bottom rear flap 141 and inserts and locks the insertion piece 111d of the bottom front flap 111, the stored article M made of heavy material is used. Even if the container is carried in the article accommodating space A and carried, the bottom of the box can be prevented from falling out, and the box can be securely held and the shape of the entire container can be exhibited.

  Further, since the direction D2 in which the insertion piece is engaged with the engagement slit 141c is opposite to the direction D1 in which the bottom rear flap 141 is attached to the bottom front flap 111, the heavy article M is stored in the article accommodation space. The bottom of the box can be prevented from slipping out even if it is stored in A and carried.

  Further, the bottom left side flap 121 and the bottom right side flap 131 are in contact with the insertion piece 111d from above the insertion piece 111d in a state where the bottom opening O of the article storage space A is closed, so that the locking is performed. Withdrawal resistance of the insertion piece 111d with respect to the slit 141c is generated, so that excellent box shape retention at the box bottom can be exhibited.

Also, a front upper end reinforcing panel 112 bent toward the article storage space A adjacent to the upper side of the front panel 110 and a front interior panel 13 bent into the article storage space A adjacent to the upper side of the front upper end reinforcing panel 112 And a bottom holding piece 114 that is bent to the bottom of the article storage space A adjacent to the upper side of the front interior panel 113, so that a heavy article M is stored in the article storage space A. In addition, the entire storage box can exhibit more excellent shape retention without being distorted.
Further, the bottom holding piece 114 is sandwiched between the bottom left side flap 121 and the bottom right side flap 131 and the insertion piece 111d in a state where the bottom opening O of the article storage space A is closed, so that the locking slit is formed. Withdrawal resistance of the insertion piece 111d with respect to 141c is generated, so that the bottom of the box can be further prevented from falling out.

Further, since the storage box 100 is formed of the elastically deformable hard plastic sheet S, the storage article M can be more reliably held as compared with the case where the storage box 100 is made of corrugated paper or the like. Therefore, the assembling work and the dismantling work can be easily achieved.
It is possible to store the storage article M made of a heavy object.
Furthermore, since the locking slit 141c and the insertion piece 111d are formed of a plastic sheet harder than corrugated cardboard or the like, it is possible to reliably hold even a contained article M made of a heavy material. Is enormous.

100, 200 ... accommodation box 100A ... box frame body 110, 210 ... front panel 110a ... left side 110b ... right side 110c ... opening 110d ... bottom side 110e ... top side 111, 211 ... bottom front flap 111a ... rectangular part 111b ... protruding part 111c ... concave area 111d, 211d ... insert piece 112 ... front upper end reinforcing panel 112a ... upper side 113 ... Front interior panel 113a Top side 114, 214 Bottom holding piece 120 Left side panel 120a Bottom side 120b Top side 120c Left side 121 Bottom left side flap 121a ..Slanted side 121b Tongue part 122 Top left side flap 123 Folded piece 124 Insert slit 125 insertion slit 130 right side panel 130a right side 130b bottom side 130c top side 131 bottom right side flap 131a inclined side 131b tongue 132・ ・ ・ Top side right side flaps 140, 240 ・ ・ ・ Back panel 140a ・ ・ ・ Bottom side 140b ・ ・ ・ Top side 140c ・ ・ ・ Right side (folding line)
141, 241 Bottom rear flap 141a Base end portion 141b, 241b Projecting portion 141c, 241c Locking slit 142 Top panel 142a Top side 143 Top Surface flap 143a Upper side 143b Insert holding piece 144 Insert tongue 144a Locking slit 145 Insert tongue 145a Locking slit 150 Assembly reinforcement Member 151: Rod-shaped main body 152: Locking tongue piece 153: Locking tongue piece

A ... article accommodation space O ... bottom opening M ... accommodation article S ... hard plastic sheet L ... assembly line D1 ... assembly direction of bottom rear flap to bottom front flap D2 ... Locking direction of the insertion piece with respect to the locking slit D3: Moving direction of the bottom rear flap W: Load L: Width of the storage box D: Depth of the storage box H: of the storage box height

Claims (5)

A box frame forming an article accommodating space is formed integrally with a rectangular front panel, a left side panel, a right side panel, and a back panel, and a bottom front flap continuous through a bottom of the front panel. The article storage space includes a bottom left side flap continuous through the bottom of the left side panel, a bottom right flap continuous through the bottom of the right side panel, and a bottom rear flap continuous through the bottom of the back panel. In a storage box that is closed to a bottom opening of the article storage space by being assembled with each other in a state of being bent toward,
The bottom front flap has an insertion piece that can be bent toward the article storage space by cutting and raising a part of the bottom front flap,
A foldable housing, wherein the bottom rear flap has a locking slit that cuts out a part of the bottom rear flap and inserts and engages with the insertion piece of the bottom front flap. box. The insertion piece of the bottom front flap is formed so as to be able to undulate by cutting a part of the bottom front flap in a claw shape toward the bottom side of the front panel,
The foldable storage box according to claim 1, wherein a direction in which the insertion piece is locked to the locking slit is opposite to a direction in which the bottom rear flap is attached to the bottom front flap.   2. The insert according to claim 1, wherein the bottom left side flap and the bottom right side flap are in contact with the insert from above the insert with the bottom opening of the article storage space closed. Alternatively, the foldable storage box according to claim 2. A front upper end reinforcement panel that is continuously bent toward the article storage space on an upper side of the front panel, a front interior panel that is continuously folded on the upper side of the front upper end reinforcement panel into the article storage space, and the front interior panel A bottom restraining piece that is continuously folded on the bottom of the article storage space on the upper side,
The said bottom holding piece is clamped by the said bottom left side flap, the bottom right side flap, and the insertion piece in the state which closed the bottom opening of the said goods accommodation space, The said insertion piece. The foldable storage box according to claim 3. The foldable storage box according to any one of claims 1 to 4, wherein the storage box is formed of an elastically deformable hard plastic sheet.

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