JP2022171158A - storage box - Google Patents

Abstract

To provide a storage box having an engagement mechanism capable of maintaining a good engagement state even when an insertion piece and an insertion port are inserted and pulled out of the storage box multiple times.SOLUTION: In a storage box 100, an insertion port 82 provided in a flap 80 is configured by opening having a side edge 826 in a width direction 92 and a length direction 94, and has two different locations of a longest position part 822 having a longest dimension L1 in a longitudinal direction and a shortest position part 824 having a shortest dimension L2 smaller than the longest dimension, the longest position part is located on the side of a back plate fold line 42 in the width direction with respect to the shortest position part, In a length measurement along the width direction, a length A between the back plate fold line and a lid plate fold line 72 in a lid plate 70 is greater than a length B between the back plate fold line and the longest position part of the insertion port.SELECTED DRAWING: Figure 1

Description

There is an application for the application of Article 30, Paragraph 2 of the Patent Act. Sales at Zuiko Medical Co., Ltd. on February 9, 2021

The present invention relates to storage boxes.

A storage box made of paper and formed by erecting left and right side plates, front and rear rear plates, and front plates on the outer periphery of a rectangular bottom plate, is surrounded by both side plates, rear plates, and front plates. A cover plate is connected to the rear plate for closing the upper end opening, and an insertion piece is connected to the edge of the cover plate. On the other hand, the front plate is provided with an insertion opening at the upper end opening.
In such a storage box, the top opening can be repeatedly opened and closed by the cover plate by inserting and withdrawing the insertion opening and the insertion piece of the cover plate (for example, Patent Document 1).

The above-mentioned receptacle may be a simple cut having a width approximately equal to the thickness of the insert piece, or a slit shape having a width larger than the thickness of the insert piece. The shape of the slit may be a simple rectangular shape in plan view, or a shape that gradually narrows toward the inside of the box from the crease line of the flap at both ends in the longitudinal direction of the slit as shown in FIG. 3 of Patent Document 1. There are those that have

JP 2016-84167 A

If the receptacle is in the form of a simple cut, the receptacle and the insertion piece can be locked by friction between the two by making the longitudinal sizes of the receptacle and the insertion piece substantially the same. In this case, there is a drawback that the insertion piece is likely to come off from the insertion port due to the engagement by friction, that is, the cover plate is likely to open, making it difficult to close the upper end opening.

In order to improve the ease of removal of the insertion piece from the receptacle, or when the receptacle has a slit shape, the insertion piece has a In many cases, locking portions protruding in the longitudinal direction of the insertion piece are provided at both ends of the insertion piece to form a mushroom shape. In this form, the longitudinal length of the insertion piece including the locking portion is greater than the longitudinal length of the insertion opening, the insertion piece passes over the insertion opening, and the locking portion is inserted. Engagement with the port engages and locks the insertion piece and the receptacle. Such a locking form is commonly called a "mushroom lock".

The degree of engagement (degree of engagement) in such a mushroom lock depends on the difference in size between the insertion piece and the receptacle. The load on the connector is large, and the insertion piece and the insertion port are severely worn at both ends in the longitudinal direction due to repeated insertion and extraction. As a result, the engagement becomes incomplete after opening and closing many times, and the cover plate is often lifted up, and the locking portion and the insertion piece are often damaged.

In addition, when the lock is set to be strong, when the user picks up the edge of the cover plate to open the package, the boundary between the insertion piece and the cover plate may be broken.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides an engagement mechanism that can maintain a good engagement state even when an insertion piece and an insertion opening in a storage box are inserted and removed multiple times. The purpose is to provide a storage box with

In order to achieve the above object, the present invention is configured as follows.
That is, a storage box according to one aspect of the present invention includes a box main body having a front plate, a right side plate, a left side plate, a back plate, and a bottom plate, and a box main body portion which is continuously provided from the upper side of the back plate via the back plate fold line. A cover plate having an insertion piece connected via a cover plate fold line located on the front end side of the cover plate, and a cover plate connected from the upper side of the front plate via the front plate fold line. A storage box comprising a flap, the flap having an insertion opening into which the insertion piece is inserted,
The direction in which the front plate and the back plate are arranged is defined as the width direction of the box main body, and the direction perpendicular to the width direction in a plan view is defined as the longitudinal direction. having a longest dimension in the longitudinal direction and a shortest position part having a shortest dimension smaller than the longest dimension at two different locations in the width direction, and the longest position The part is located on the side of the crease line of the back plate in the width direction with respect to the shortest position part,
In the length measurement along the width direction, the length between the back plate fold line and the cover plate fold line on the cover plate is greater than the length between the back plate fold line and the longest position part of the insertion port. ,
It is characterized by

According to one aspect of the present invention, the storage box has an insertion piece and an insertion opening, the insertion opening has a longest position portion and a shortest position portion, and the back plate crease line of the cover plate and the cover plate. By configuring the length between the fold lines to be longer than the length between the fold line of the back plate and the longest position in the insertion port, the insertion piece and the insertion port can be pulled out and inserted multiple times. can also maintain good engagement.

It is a perspective view which shows the storage box in embodiment of this invention. 2 is a top view of the storage box shown in FIG. 1 with a cover plate removed; FIG. FIG. 2 is a front view of the storage box shown in FIG. 1; 2 is a perspective view of the storage box shown in FIG. 1 with a cover plate closed; FIG. It is a figure which shows the blank sheet of the storage box shown in FIG. 6 is an enlarged view of a portion of the blank sheet shown in FIG. 5 including the cover plate and the flap; FIG. 2 is an enlarged plan view of the receptacle shown in FIG. 1 and the like; FIG. 2 is an enlarged plan view of the insert piece shown in FIG. 1 and the like; FIG. FIG. 3 is a plan view showing a modification of the receptacle shown in FIG. 1 and the like; FIG. 3 is a plan view showing a modification of the receptacle shown in FIG. 1 and the like; FIG. 3 is a plan view showing a modification of the receptacle shown in FIG. 1 and the like; FIG. 3 is a plan view showing a modification of the receptacle shown in FIG. 1 and the like; FIG. 3 is a plan view showing a modification of the receptacle shown in FIG. 1 and the like; FIG. 3 is a plan view showing a modification of the receptacle shown in FIG. 1 and the like; FIG. 3 is a plan view showing a modification of the receptacle shown in FIG. 1 and the like; FIG. 3 is a plan view showing a modification of the receptacle shown in FIG. 1 and the like; It is a figure which shows the modification of the opening provided in the front plate shown in FIG. 1 etc. FIG.

A storage box according to one embodiment of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code|symbol is attached|subjected about the same or similar component. In addition, in order to avoid unnecessary redundancy in the following description and facilitate the understanding of those skilled in the art, detailed descriptions of already well-known matters and redundant descriptions of substantially the same configurations may be omitted. . Also, the following description and the content of the accompanying drawings are not intended to limit the subject matter recited in the claims.

The storage box in this embodiment described below is, for example, a paper box for storing a disposable mask or the like. , but not limited to.
Also, the material used is not limited to paper, and for example, corrugated cardboard, materials having softness and/or flexibility, such as resin plates, etc., can be used.

As shown in FIG. 1, the storage box 100 in this embodiment includes a box main body 60 having a front plate 10, a right side plate 20, a left side plate 30, a rear plate 40, and a bottom plate 50, a cover plate 70, and a flap. 80 is a box. It should be noted that the names such as "front plate" are omitted for convenience of explanation and ease of understanding, and may also be referred to as the first face plate, the second face plate, and the like.
Here, the lid plate 70 is connected to the rear plate 40 from the upper side of the rear plate 40 via the rear plate fold line 42 , and is connected to the rear plate 40 via the lid plate fold line 72 located on the tip side of the lid plate 70 . It has an insertion piece 74 connected to 70 . The flap 80 is connected to the front plate 10 from the upper side of the front plate 10 via the front plate fold line 12 and has an insertion opening 82 near the front plate fold line 12 into which the insertion piece 74 is inserted. In this embodiment, such a flap 80 covers the opening of the box body 60 as shown in FIG. can be opened and closed via Moreover, the flap 80 may be any member that has a region that forms the insertion port 82, and it is not essential to cover the opening of the box main body 60 or have the window 84 as in the present embodiment.

The storage box 100 having such a configuration covers the flap 80 that previously covers the opening of the box body 60 so as to cover the opening of the box body 60, and the cover plate 70 folds the back plate. It can be opened and closed via the line of sight 42 . Accordingly, the insertion piece 74 is repeatedly inserted into and pulled out of the insertion port 82 in association with the opening and closing. The storage box 100 is designed by devising such engagement between the insertion piece 74 and the insertion port 82, and this point will be described in detail below.
1 shows the state in which the cover plate 70 is opened, and FIG. 4 shows the state in which the cover plate 70 covers the opening of the box main body 60, that is, the storage box 100 is in the closed state.

Further, the front plate 10 has an opening 14 into which a user's finger can enter and push for pressing the insertion piece 74 inserted into the insertion port 82 toward the rear plate folding line 42 side. In the embodiment, it has a substantially semicircular shape from the front plate fold line 12 . FIG. 3 shows such openings 14 . However, the opening 14 does not necessarily include the front plate fold line 12, and the opening 14 may have a shape that allows the user's finger to enter and press the insertion piece 74 toward the rear plate fold line 42 when the cover plate 70 is opened. It may well have a circular shape spaced apart from the front plate fold line 12, for example as shown in FIG.

FIG. 5 shows a blank sheet 102 in which the storage box 100 configured as described above is laid out on a plane. Incidentally, in the present embodiment, as an example, it is formed by punching a cardboard with a thickness of about 0.4 mm.
The blank sheet 102 includes a back plate 40, a left side plate 30, a front plate 10, and a right side plate 20, which are connected to each other so as to be assembled as shown in FIG. It is composed of a bottom plate 50 , a cover plate 70 and a flap 80 . A cover plate 70 is connected to the upper side of the back plate 40 via a back plate folding line 42, and a first bottom plate 52 is connected to the lower side via a first bottom plate folding line 51. - 特許庁A first protruding piece 34 is connected to the upper side of the left side plate 30 via a folding line 32, and a second bottom plate 54 is connected to the lower side via a second bottom plate folding line 53, respectively. A flap 80 is connected to the upper side of the front plate 10 via the front plate folding line 12, and a third bottom plate 56 is connected to the lower side via the third bottom plate folding line 55. - 特許庁A second protruding piece 24 is connected to the upper side of the right side plate 20 via a folding line 22, and a fourth bottom plate 58 is connected to the lower side via a fourth bottom plate folding line 57, respectively. Here, the first bottom plate 52, the second bottom plate 54, the third bottom plate 56, and the fourth bottom plate 58 are configured to engage with each other. 50 is formed and the box body 60 of the storage box 100 is assembled.

Then, the flap 80 is folded toward the box main body 60 via the front plate fold line 12, and the cover plate 70, which is formed by folding the insertion piece 74 via the cover plate fold line 72, is folded through the back plate fold line 42. The insertion piece 74 is inserted into the insertion opening 82 of the flap 80 by bending toward the box main body 60 and the flap 80 side.
Thus, the storage box 100 is formed.

Next, mainly referring to FIGS. 6 to 8, the positional relationship and engagement relationship between the insertion piece 74 and the insertion port 82 will be described. Here, as shown in FIG. 1, the direction in which the front plate 10 and the rear plate 40 are arranged is defined as the width direction 92 of the box main body 60, and the direction perpendicular to the width direction 92 in plan view, that is, the right side plate 20 and the right side plate 20 The direction in which the left side plate 30 is aligned is defined as the longitudinal direction 94 of the box main body 60 .
The insertion opening 82 in the flap 80 is configured with an opening having side edges 826 in the width direction 92 and the longitudinal direction 94 as shown in FIG. , the longest position portion 822 having the longest dimension L1 and the shortest position portion 824 having the shortest dimension L2 smaller than the longest dimension L1 are provided at two different locations in the width direction 92 . Although FIG. 7 corresponds to an enlarged view of the insertion port 82 shown in FIG. 1 and the like, it is illustrated through a broken line in the longitudinal direction 94 for convenience of explanation.
Here, as shown in FIG. 6, the longest position portion 822 is positioned on the side of the back plate fold line 42 in the width direction 92 with respect to the shortest position portion 824 . Further, in this embodiment, the shortest position portion 824 is aligned with the front plate folding line 12 . Incidentally, as will be described later with reference to FIG. 9H, the shortest position portion 824 does not have to coincide with the front plate fold line 12 .

The side edges 826 that form the outline of the receptacle 82 are, in this embodiment, formed of widthwise side edges 826a and longitudinal side edges 826b, as shown in FIG. The width direction side edge 826a connects the end 82b in the longitudinal direction 94 of the side edge 826 at the shortest position 824 and the end 82c in the longitudinal direction 94 of the side edge 826 at the longest position 822, It is the arcuate side edge that outlines the receptacle 82 . In addition, the longitudinal side edges 826b connect the ends 82c in the longitudinal direction 94 of the side edges 826 at the longest position 822 and form the outline of the insertion opening 82, and project toward the back plate fold line 42 side. Some arcuate side edges.
In this embodiment, the side edges 826, which are the contours of the insertion opening 82, are symmetrically formed in the longitudinal direction 94 with a center line 827 extending in the width direction 92 including the midpoint of the longest dimension L1 as the axis of symmetry. ing. It should be noted that the side edges 826 need not be symmetrical, as described below with reference to Figures 9E or 9G.

Furthermore, as shown in FIG. 6, in the length measurement along the width direction 92, the length A between the back plate fold line 42 and the cover plate fold line 72 in the cover plate 70 is the difference from the back plate fold line 42. It is configured to be larger than the length B between the inlet 82 and the longest position portion 822 . Also, the length A is the length that matches the dimension between the back plate fold line 42 and the front plate fold line 12, that is, the width dimension in the width direction 92 of the storage box 100. As shown in FIG.

Incidentally, in FIG. 6, a supplementary explanation will be given of the back plate fold line 42 marked on the flap 80 portion, which is the base point of the length B. As shown in FIG. As already explained, the storage box 100 is formed by assembling the blank sheets 102 . During this assembly, the protruding piece 86 of the flap 80 is bent and inserted into the box main body 60 via the folding line 86a. It is the back plate crease line 42 marked on the flap 80 portion. Also, in FIG. 6, the back plate fold line 42 and the front plate fold line 12 are shown on a straight line, but they are arranged at different locations depending on the assembly as described above.

In addition, the length between the front plate fold line 12 in the width direction 92, that is, the length between the shortest position portion 824 and the longest position portion 822 in this embodiment, is sufficient to ensure a good engagement state between the insertion piece 74 and the insertion port 82. It is a dimension that becomes important for maintaining , and is a dimension determined by ingenuity and trial and error by the applicant. In this embodiment, it is approximately in the range of 1.0-1.5 mm. Also, the length between the shortest position portion 824 and the longest position portion 822 needs to be appropriately adjusted depending on the shape or material of the insertion port 82 and the insertion piece 74 . In this embodiment, the insertion piece 74 passes through a position 1.2 mm from the longest position 822 , ie, a position 0.3 mm from the shortest position 824 when inserted into the insertion port 82 .

The interrelationship between the longest position portion 822, the shortest position portion 824, the length A, and the length B described above allows the insertion piece of the cover plate 70 to close the box main body 60 of the storage box 100. When the insertion piece 74 is simply inserted into the insertion opening 82 of the flap 80 without applying a force in the width direction 92 to 74, the length A matches or substantially matches the width dimension of the storage box 100, so the insertion is easy. The piece 74 is positioned at or near the shortest position 824 in the insertion opening 82, in this embodiment at or near the front plate fold line 12. As shown in FIG.

Next, referring to FIG. 8, the insert piece 74 will be described in detail.
In this embodiment, the insert piece 74 has a substantially trapezoidal shape, and has a tapered portion 77 from near the lid fold line 72 toward the upper bottom of the insert piece 74. At both ends in the longitudinal direction 94 adjacent to 72 , locking portions 76 are formed by notches that engage with side edges 826 of the insertion port 82 to lock the insertion piece 74 in the insertion port 82 . . A dimension L3 between the locking portions 76 in the longitudinal direction 94 , that is, the longest dimension of the insertion piece 74 is designed to be slightly larger than the longest dimension L1 at the longest position portion 822 of the insertion port 82 . By providing such a locking portion 76, the insertion piece 74 and the insertion port 82 can be engaged with the above-described so-called "mushroom lock".
On the other hand, the engaging portions 76 are not limited to being provided at both ends of the insertion piece 74 , and may be provided at least at one end in the longitudinal direction 94 . Furthermore, the locking portion 76 may not be provided. That is, by having the above-described mutual relationship among the longest position portion 822, the shortest position portion 824, the length A, and the length B, the insertion piece 74 can be physically Secondly, since the insertion port 82 is biased and pressed toward the shortest position portion 824 side, the friction between the two is greater than in the conventional structure, and a better locking state can be obtained without relying on the mushroom lock. is.

9A-9H (sometimes collectively referred to as "FIG. 9"), variations of the side edges 826 that form the profile of the receptacle 82, i.e. Modifications will be explained. Here, the modified examples are not limited to the following forms, and may be any form having the mutual relationship between the longest position portion 822, the shortest position portion 824, the length A, and the length B described above.

In the present embodiment, as described above, the side edges 826 of the insertion port 82 are formed by the widthwise side edges 826a and the longitudinal side edges 826b, and are different in the width direction 92 with the longest position portion 822 as a boundary. Although the shape (for example, as shown in FIG. 7, the widthwise side edge 826a on the left side and the longitudinal side edge 826b on the right side) is configured, the shape may be the same in the width direction 92 as shown in FIG. 9A. In this example, the insertion port 82 has a symmetrical shape in the width direction 92 and the longitudinal direction 94 with the longest position portion 822 and the above-described center line 827 as the axes of symmetry. Also, as shown in Figures 9B and 9C, the longitudinal side edges 826b may be formed in a rectangular shape instead of an arcuate shape. Alternatively, as shown in FIG. 9D, the longitudinal side edge 826b may be positioned above the longest portion 822 and be straight. 9A to 9D, the insertion port 82 has a symmetrical shape in the longitudinal direction 94 with the central line 827 as the axis of symmetry.

Also, in this embodiment, as described above, the shortest position portion 824 has a shortest dimension L2 of a certain length, but it may be a "point" as shown in FIG. 9E. In FIG. 9E, the width direction side edge 826a is shown as a straight line, and the longitudinal side edge 826b is shown as a straight line or an arc shape. 826 may each be symmetrical in longitudinal direction 94 with centerline 827 as the axis of symmetry.

Further, when the width direction side edge portion 826a is formed in an arc shape, as shown in FIG. 9F, the arc shape may be opposite to that of the present embodiment described above. At this time, the shape of the longitudinal side edge 826b may be either the present embodiment or the above modification. Further, as shown in FIG. 9G, the shape of each width direction side edge 826a in the longitudinal direction 94 may be different on both end sides in the longitudinal direction 94. As shown in FIG. Again, the shape of the longitudinal side edge 826b may be either this embodiment or the above modification.

Furthermore, as shown in FIG. 9H, the shortest position portion 824 and the front plate fold line 12 do not have to be aligned, and the longest position portion 822 is behind the shortest position portion 824 in the width direction 92. It may be positioned on the face plate folding line 42 side.

Moreover, it is also possible to combine these modified examples.

The operation of handling the storage box 100 according to the present embodiment configured as described above, particularly the engagement operation between the insertion piece 74 and the insertion port 82 will be described below.
As already explained, in order to close the box body 60 of the storage box 100, the insertion piece 74 of the cover plate 70 is simply inserted into the insertion opening 82 without applying force to the insertion piece 74 in the width direction 92. At this time, the insertion piece 74 is positioned at the shortest position portion 824 of the insertion port 82, which is at the front plate fold line 12 in this embodiment. Actually, the insertion piece 74 has a tapered portion 77 so as to form a tapered shape as shown in FIG. As shown in FIG. 7, the tapered portion 77 of the insertion piece 74 is pressed at a position between the shortest position portion 824 and the longest position portion 822 in the width direction 92, for example, the position P. It is inserted into the receptacle 82 in contact with the portion 826a.

As the insertion piece 74 is further inserted into the insertion opening 82, the length of the insertion piece 74 in the longitudinal direction 94, which is in contact with the width direction side edge 826a of the insertion opening 82, increases. 74 moves to the longest position portion 822 side in the width direction 92 , and finally, at the longest position portion 822 , the locking portion 76 is pushed into the insertion opening 82 .
Here, when the insertion piece 74 is positioned at the longest position 822, the cover plate 70 is bent due to the relationship of length A>length B, as is the case during movement to the longest position 822 side. in a curved state. Therefore, the insertion piece 74 is biased toward the shortest position portion 824 in the width direction 92 by the restoring force of the cover plate 70 .

Therefore, after the locking portion 76 is inserted into the insertion port 82 at the longest position portion 822 , the insertion piece 74 protrudes in the longitudinal direction 94 so that the notch 76 a forming the locking portion 76 is in the insertion port 82 . It moves so as to return to the shortest position portion 824 side while sliding on the width direction side edge portion 826a.
At a place where the length in the longitudinal direction 94 of the notch 76a and the length of the widthwise side edge 826a in the longitudinal direction 94 match, the insertion piece 74 stops moving, and with respect to the insertion port 82, So-called mushroom lock.
As a result, the storage box 100 is closed by the cover plate 70 .

On the other hand, when opening the storage box 100 , that is, the cover plate 70 , the user presses the insertion piece 74 with a finger through the opening 14 of the front plate 10 toward the longest position portion 822 in the width direction 92 . As a result, the insertion piece 74 moves to the longest position portion 822. At this time, by lifting the cover plate 70 upward, the locking portion 76 of the insertion piece 74 is disengaged from the insertion port 82, and the insertion piece 74 is inserted. The piece 74 is removed from the insertion opening 82 . As a result, the cover plate 70 can be rotated via the back plate fold line 42, and the storage box 100 is opened.

As described above, according to the storage box 100 of the present embodiment, the mutual relationship between the longest position portion 822, the shortest position portion 824, the lengths A, and the lengths B described above allows the connection with the insertion port 82. Insertion and withdrawal of the insertion piece 74 is performed at the longest position portion 822 of the insertion port 82, and can be performed in a state where the degree of friction or engagement between the insertion piece 74 and the insertion port 82 is the lowest. Therefore, for example, breakage of the insert piece 74 itself and breakage near the boundary between the insert piece 74 and the cover plate 70 can be reduced as compared with the conventional case. Therefore, it is possible to provide an engagement mechanism that can maintain a good engagement state even when the insertion piece 74 and the insertion port 82 are inserted and removed a plurality of times.
Further, the insertion piece 74 inserted at the longest position portion 822 of the insertion port 82 moves to the shortest position portion 824 side of the insertion port 82, and in this embodiment, a so-called mushroom lock is effected. As a result, it is possible to prevent the cover plate 70 from being opened carelessly.

Further, even if the insertion piece 74 does not have the engaging portion 76, the insertion piece 74 is biased toward the shortest position portion 824 even after being inserted into the insertion port 82. Friction with the insertion port 82 is greater than before. Therefore, it is possible to prevent the cover plate 70 from being opened carelessly.

The effects described above can be obtained in the same manner with the modified example of the insertion port 82 described above with reference to FIG.

The present invention can be applied to storage boxes.

10... front plate, 12... front plate crease line, 20... right side plate, 30... left side plate,
40... Back plate, 42... Back plate crease line, 50... Bottom plate, 60... Box body,
70... Lid plate, 72... Lid plate crease line, 74... Insert piece, 80... Flap,
82...Inlet, 92...Width direction, 94...Longitudinal direction, 100...Storage box,
822 ... longest position part, 824 ... shortest position part, 826 ... side edge part,
L1...longest dimension, L2...shortest dimension,
A, B... Length.

Claims (6)

A box main body having a front plate, a right side plate, a left side plate, a back plate, and a bottom plate, and a cover plate continuous from the upper side of the back plate via the back plate fold line, the front end side of the cover plate. A cover plate having an insertion piece connected through the cover plate fold line located at the top of the front plate, and a flap connected from the upper side of the front plate through the front plate fold line, wherein the insertion piece is inserted. A storage box comprising a flap having an inlet,
The direction in which the front plate and the back plate are arranged is defined as the width direction of the box main body, and the direction perpendicular to the width direction in a plan view is defined as the longitudinal direction. having a longest dimension in the longitudinal direction and a shortest position part having a shortest dimension smaller than the longest dimension at two different locations in the width direction, and the longest position The part is located on the side of the crease line of the back plate in the width direction with respect to the shortest position part,
In the length measurement along the width direction, the length between the back plate fold line and the cover plate fold line on the cover plate is greater than the length between the back plate fold line and the longest position part of the insertion port. ,
A storage box characterized by: 2. The storage box according to claim 1, wherein the shortest position of the insertion opening is located on the fold line of the front plate. The receptacle has an arcuate widthwise side edge connecting between one or two longitudinal ends at the shortest position and each longitudinal end at the longest position and forming a contour of the receptacle. The storage box according to claim 1 or 2, comprising: Claims 1 to 3, wherein the receptacle has an arcuate longitudinal side edge that is convex toward the fold line of the back plate and forms an outline of the receptacle that joins the ends in the longitudinal direction at the longest position. The storage box according to any one of 5. The storage box according to any one of claims 1 to 4, wherein the insertion piece has, on at least one end in the longitudinal direction, a locking portion that engages with the insertion port to lock the insertion piece in the insertion port. . 6. The storage box according to any one of claims 1 to 5, wherein said front plate has an opening for pressing an insertion piece inserted into said insertion port toward the fold line of the rear plate.

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