JP3169848U - Assembly box - Google Patents

Abstract

An assembly box is provided that can further improve the assemblability of a top surface flap constituting the top surface. An insertion hole dimension W1 and an insertion width dimension W2 are made smaller than a dimension Wo between a pair of first side surfaces 1C, 1D, and top surface insertion holes 5C, 5D and a top surface insertion part are provided. 5A and 5B are set at positions shifted from the first side surfaces 1C and 1D to the center side in the insertion width direction. Thereby, even if it inserts the insertion parts 5A and 5B for top surfaces in the insertion holes 5C and 5D for top surfaces, the insertion parts 5A and 5B for top surfaces and the inner wall surface of 1st side surface 1C, 1D do not interfere. Therefore, it is not necessary for the operator to hold the assembly box in a state where the first side surfaces 1C and 1D and the second side surface are orthogonal to each other, and thus it becomes easy to aim at the top surface insertion holes 5C and 5D. [Selection] Figure 4

Description

  The present invention relates to an assembly box configured in a cubic shape by folding a sheet material such as cardboard, and is effective when used for a box for storing or transporting fruit and vegetables, beverage containers, industrial parts, machine parts, etc. It is.

  2. Description of the Related Art Conventionally, an assembly box that can be assembled by folding a sheet material cut into a predetermined shape along a predetermined fold line is known (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-12020

  By the way, as an assembly box for storing fruits and vegetables, the inventor made a prototype of an assembly box as shown in FIG. 9, and in this prototype, assembling a top surface flap constituting the top surface as described later. It was proved that sex should be further improved.

  In view of the above points, an object of the present invention is to further improve the assemblability of the top surface flap that constitutes the top surface.

  In order to achieve the above object, according to the present invention, in the device according to claim 1, by folding the sheet material, the top surface (1A), the bottom surface (1B), a pair of first side surfaces (1C, 1D) and a pair of second side surfaces (1E, 1F) facing each other in a state of being orthogonal to the first side surface (1C, 1D). 1D), provided on the top side first flaps (3A, 3B) and the second side surfaces (1E, 1F) for constituting the top surface (1A), and constitutes the top surface (1A). For the top surface, and the first top surface flap (3A, 3B) has a top surface insertion portion set as the top surface second flap (3C). The top surface insertion holes (5C, 5D) into which (5A, 5B) are inserted are provided, and the first side surface ( When the direction orthogonal to C, 1D) is called the insertion width direction, the dimension between one end and the other end of the insertion width direction in the insertion hole for the top surface (5C, 5D) and the insertion for the top surface Of the parts (5A, 5B), the dimension between the one end and the other end in the insertion width direction is smaller than the dimension (Wo) between the pair of first side surfaces (1C, 1D), and the top surface insertion hole (5C, 5D) and the top surface insertion portions (5A, 5B) are set at positions shifted from the first side surface (1C, 1D) to the center side in the insertion width direction.

  Accordingly, in the device according to claim 1, the top surface insertion portion (5A, 5B) set in the second top surface flap (3C) is used as the first top surface flap (3A, 3B). When an operator performs an operation of inserting into the provided top surface insertion holes (5C, 5D), the top surface insertion holes (5C, 5D) can be easily aimed at, so the top surface (1A) is configured. The assemblability of the top surface flap can be further improved.

  That is, in the prototype examination product shown in FIG. 9, the dimension (W1) between one end and the other end in the insertion width direction of the top surface insertion holes (5C, 5D), and the top surface insertion portion (5A). 5B), the dimension (W2) between one end and the other end in the insertion width direction is substantially the same as the dimension (Wo) between the pair of first side surfaces (1C, 1D).

  On the other hand, the assembly box bends the sheet material into a box shape. Therefore, the first side surface (1C, 1D) and the second side surface (1E, 1F) are usually in a state before the top surface (1A) is formed. Are not orthogonal to each other and have a parallelogram shape.

  For this reason, if the first side surface (1C, 1D) and the second side surface (1E, 1F) are not orthogonal, the top surface insertion portion (5A, 5B) is inserted into the top surface insertion hole (5C 5D), the top surface insertion portion (5A, 5B) interferes with the inner wall surface of the first side surface (1C, 1D), so the top surface insertion portion (5A, 5B) There was a problem that it was difficult to insert.

  Therefore, in the trial product shown in FIG. 9, in order to perform the work of inserting the top surface insertion portions (5A, 5B) into the top surface insertion holes (5C, 5D), the operator must 1C, 1D) and the second side surface (1E, 1F) are held in an orthogonal state, and the top surface second flap (3C) is inserted into the top surface insertion hole (5C, 5D). Since it was necessary to move the 2nd flap (3C) for the top surface so as to be inserted into the top surface, it became difficult to aim at the insertion holes (5C, 5D) for the top surface, and it was difficult to assemble the top surface flap. .

  On the other hand, in the device according to claim 1, the dimension (W1) between one end and the other end in the insertion width direction among the insertion holes (5C, 5D) for the top surface, and the insertion for the top surface The dimension (W2) between one end and the other end in the insertion width direction of the parts (5A, 5B) is smaller than the dimension (Wo) between the pair of first side surfaces (1C, 1D) and for the top surface Since the insertion hole (5C, 5D) and the top surface insertion part (5A, 5B) are set at positions shifted from the first side surface (1C, 1D) to the center side in the insertion width direction, With the one side surface (1C, 1D) and the second side surface (1E, 1F) not orthogonal to each other, insert the top surface insertion portion (5A, 5B) into the top surface insertion hole (5C, 5D). However, the top surface insertion portion (5A, 5B) does not interfere with the inner wall surface of the first side surface (1C, 1D).

  Therefore, in the device according to claim 1, the operator does not need to hold the assembly box in such a state that the first side surface (1C, 1D) and the second side surface (1E, 1F) are orthogonal to each other. It becomes easy to aim at the insertion holes (5C, 5D) for the top surface, and the assemblability of the top surface flap can be further improved.

  Moreover, in the device described in claim 1, as in the device described in claim 2, the dimension (W1) between one end and the other end in the insertion width direction of the top surface insertion holes (5C, 5D). ) And the top surface insertion portion (5A, 5B), the dimension (W2) between one end and the other end in the insertion width direction is the dimension (Wo) between the pair of first side surfaces (1C, 1D). It is desirable to make it 85% or less.

  In the device according to claim 3, the top surface insertion holes (5C, 5D) are provided by bending a part of the top surface first flap (3A, 3B) to the bottom surface (1B) side. Furthermore, the folding line (L4) formed when providing the top surface insertion holes (5C, 5D) intersects the insertion direction of the top surface insertion portions (5A, 5B). It is characterized by being.

  Accordingly, in the invention according to claim 3, the top surface second flap (3C) is moved so that the top surface insertion portion (5A, 5B) is inserted into the top surface insertion hole (5C, 5D). Then, a portion of the top surface first flap (3A, 3B) is automatically folded inward to form a top surface insertion hole (5C, 5D). Before inserting 5A, 5B) into the top surface insertion holes (5C, 5D), it is not necessary to perform an operation for forming the top surface insertion holes (5C, 5D) in advance. Therefore, workability at the time of inserting the top surface insertion portions (5A, 5B) into the top surface insertion holes (5C, 5D) can be further improved.

  In the device according to claim 4, the first flap for the bottom surface (4A, 4B) provided on each of the pair of first side surfaces (1C, 1D) to form the bottom surface (1B), and the pair of second side surfaces. (1E, 1F) each provided with a second bottom flap (4C, 4D) for constituting a bottom surface (1B), and a pair of bottom first flaps (4A, 4B) and a pair of bottom surfaces Each of the second flaps (4C, 4D) has a bottom surface insertion portion (6C, 6D) set in each of the other flaps (4A, 4B). The bottom surface insertion holes (6A, 6B) are provided, and the pair of bottom surface insertion holes (6A, 6B) are set at diagonal positions. Further, the bottom surface insertion portion (6C 6D) on the other flap (4A, 4B) Of these, the portion excluding the bottom insertion portion (6C, 6D) is located outside the one flap (4C, 4D) provided with the bottom insertion hole (6A, 6B), and the bottom insertion portion. (6C, 6D) is inserted into the bottom hole (6A, 6B) from the outside.

  Thus, in the invention according to claim 4, since the adjacent flaps overlap each other to form a bowl shape and the adjacent flaps support each other, the overlap between the flaps after sealing is shown in FIG. It becomes larger than the trial product to be shown, and the strength of the bottom surface (1B) can be improved, and the bottom surface (1B) can be easily sealed.

  Incidentally, the reference numerals in parentheses for each of the above-mentioned means are examples showing the correspondence with the specific means described in the embodiments described later, and the present invention is indicated by the reference numerals in the parentheses of each of the above-mentioned means. It is not limited to specific means.

1 is a perspective view of an assembly box 1 according to an embodiment of the present invention. It is a bottom view of the assembly box 1 which concerns on embodiment of this invention. It is an expanded view of the assembly box 1 which concerns on embodiment of this invention. It is a top view of the assembly box 1 which concerns on embodiment of this invention. It is a figure which shows the sealing operation | work of the top | upper surface 1A of the assembly box 1 which concerns on embodiment of this invention. It is a figure which shows the sealing operation | work of the top | upper surface 1A of the assembly box 1 which concerns on embodiment of this invention. It is the bottom face 1B side open view in the assembly box 1 which concerns on embodiment of this invention. It is a figure which shows the sealing operation | work of the bottom face 1B of the assembly box 1 which concerns on embodiment of this invention. It is a figure which shows the sealing operation | work of the top | upper surface 1A of the assembly box 1 which concerns on trial manufacture examination. It is a figure for demonstrating the effect of the assembly box 1 which concerns on embodiment of this invention.

In the present embodiment, the present invention is applied to a box for storing or transporting fruits and vegetables such as green radish (Chingensai). Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1. Structure of Assembly Box As shown in FIG. 1, the assembly box 1 according to this embodiment includes a top surface 1A, a bottom surface 1B (see FIG. 2), a pair of first side surfaces 1C and 1D and a first side surface 1C facing each other. It is a cubic (hexahedral) storage box made up of a pair of second side surfaces 1E and 1F facing each other in a state substantially orthogonal to 1D.

  That is, in the assembly box 1, as shown in FIG. 3, a sheet material (corrugated cardboard in the present embodiment) 2 cut into a preset shape is folded at a fold line indicated by a two-dot chain line. The top surface 1 </ b> A and the bottom surface 1 </ b> B are configured in a cubic shape having a substantially rectangular shape.

  And the strip | belt-shaped site | part pinched by a pair of folding lines L1 and L2 extended in the left-right direction of FIG. 3 among the sheet | seat materials 2 is a site | part which comprises 1st side surface 1C, 1D and 2nd side surface 1E, 1F. . Note that an adhesive margin 2A is provided on one end side in the longitudinal direction of the belt-like portion, and the adhesive margin portion 2A is connected to the other longitudinal end of the belt-like portion by glue or staple.

  In addition, the top side first flaps 3A and 3B for configuring the top surface 1A are provided on the end side on the fold line L1 side of the first side surfaces 1C and 1D configured in a rectangular shape, and the rectangular shape is provided. The top side second flaps 3C and 3D for forming the top surface 1A together with the top side first flaps 3A and 3B are provided on the end side on the folding line L1 side of the configured second side surfaces 1E and 1F. It has been.

  On the other hand, the first side surfaces 1C and 1D are provided with bottom-side first flaps 4A and 4B for forming the bottom surface 1B on the end side on the fold line L2 side, and the fold lines L2 among the second side surfaces 1E and 1F. On the side edge, second bottom flaps 4C and 4D for forming the bottom surface 1B together with the first bottom flaps 4A and 4B are provided.

  Incidentally, the first flaps 3A and 3B for the top surface and the first flaps 4A and 4B for the bottom surface constitute the long sides of the top surface 1A and the bottom surface 1B, and the second flaps 3C and 3D for the top surface and the second flap for the bottom surface. 4C and 4D constitute the short side.

  As is well known, the corrugated cardboard forming the sheet material 2 is composed of a corrugated core and a liner bonded to the ridge of the core so as to sandwich the core. In the embodiment, the sheet material 2 is cut into a predetermined shape so that the fold line L3 that forms the boundary between the first side surfaces 1C and 1D and the second side surfaces 1E and 1F coincides with the ridge direction of the core.

  Moreover, as shown in FIG. 4, the top surface insertion portions 5A and 5B to be inserted into the top surface insertion holes 5C and 5D are provided at the width direction end portion of the front end side of the top surface second flap 3C. The top surface 1A is sealed because these top surface insertion portions 5A and 5B are inserted into the top surface insertion holes 5C and 5D provided in the first top surface flaps 3A and 3B. (Closed) state.

The width direction is a direction parallel to a direction orthogonal to the first side surfaces 1C and 1D of the assembly box 1 (hereinafter, this direction is referred to as an insertion width direction).
Of the top surface insertion holes 5C and 5D, the dimension between one end and the other end in the insertion width direction (hereinafter referred to as the insertion hole dimension W1) and the top surface insertion parts 5A and 5B. A dimension between one end and the other end in the insertion width direction (hereinafter referred to as an insertion width dimension W2) is set to be smaller than a dimension Wo between the pair of first side surfaces 1C and 1D.

  Further, the top surface insertion holes 5C and 5D and the top surface insertion portions 5A and 5B are set at positions shifted toward the center side in the insertion width direction from the first side surfaces 1C and 1D. The top surface insertion hole 5C and the top surface insertion portion 5A set on one end side in the direction, and the top surface insertion portion 5D and the top surface insertion portion 5B set on the other end side in the insertion width direction, Is set at a symmetrical position with respect to the center in the insertion width direction.

  For this reason, as shown in FIG. 3, the top side second flap 3C is set such that the width dimension on the tip side is smaller than the width dimension on the base side (fold line L1), and the top side difference is set. The part where insertion part 5A, 5B is set has the fixed width dimension (insertion width dimension W2). That is, the insertion width direction end surfaces of the top surface insertion portions 5A and 5B are set to be substantially parallel to the first side surfaces 1C and 1D.

  On the other hand, the top surface insertion hole 5C is provided in the first top surface flap 3B, and the top surface insertion hole 5D is provided in the first top surface flap 3A. The top surface insertion holes 5C and 5D are provided by bending a part of the top surface first flaps 3A and 3B to the bottom surface 1B side as shown in FIG. The folding line L4 formed when the insertion holes 5C and 5D are provided intersects the insertion direction of the top surface insertion parts 5A and 5B (this embodiment is orthogonal).

  As shown in FIG. 5, the shape of the top surface insertion holes 5 </ b> C and 5 </ b> D is axisymmetric with respect to the center in the insertion width direction (tip side L <b> 5) and is inclined with respect to the insertion direction. Two cut lines C1 and C2 extending in the vertical direction, one cut line C3 parallel to the insertion direction, a cut line C4 parallel to the folding line L4, and a folding line from the end of the cutting line C3 It is constituted by a cut line C5 extending to L4.

  The cut line C3 determines the insertion width dimension W2, and the two cut lines C1 and C2 are separated from the distal end side L5 as they approach the backward side in the insertion direction (folding curve L4 side). It is inclined with respect to the insertion direction. The cut line C5 is inclined with respect to the insertion direction so as to approach the center of the insertion width direction as it approaches the folding line L4.

  Further, as shown in FIG. 7, the bottom surface insertion holes 6C and 6D set in the bottom surface first flaps 4A and 4B are inserted into the bottom surface second flaps 4C and 4D, respectively. 6A and 6B are provided, and the pair of bottom surface insertion holes 6A and 6B and the bottom surface insertion portions 6C and 6D are set at diagonal positions.

  And the part except the bottom insertion parts 6C and 6D among the first bottom flaps 4A and 4B is located outside the second bottom flaps 4C and 4D as shown in FIG. The insertion portions 6C and 6D are inserted into the bottom surface insertion holes 6A and 6B from the outside to the inside.

  For this reason, the bottom surface insertion portions 6C, 6D are positioned inside the bottom surface second flaps 4C, 4D, and the portions other than the bottom surface insertion portions 6C, 6D in the bottom surface first flaps 4A, 4B are the bottom surface Since it will be located outside the second flaps 4C, 4D, the adjacent flaps are overlapped to form a bowl shape, and the adjacent flaps support each other. The outer side and the inner side mean the outer side and the inner side of the assembly box 1.

2. Assembly procedure of assembly box 2.1 Formation of bottom surface Second flaps 4C, 4D for bottom surface and second side surfaces 1E, 1F in a state where the adjacent first side surfaces 1C, 1D and second side surfaces 1E, 1F are substantially orthogonal to each other. After folding the second bottom flaps 4C, 4D until they are substantially orthogonal (see FIG. 7), one of the bottom flaps 4A, 4B (for example, the first bottom flap 4B) is Then, it is bent to the second flaps 4C, 4D for the bottom surface and the bottom surface insertion portion 6C is inserted into the bottom surface insertion hole 6A (see FIG. 8).

  Next, either one of the bottom flaps 4A and 4B (for example, the first bottom flap 4A) is bent to the second bottom flaps 4C and 4D to be inserted into the bottom insertion hole 6B. The insertion part 6D for use is inserted (refer FIG. 2).

  Accordingly, the bottom surface insertion portions 6C and 6D are positioned on the inner side of the bottom surface second flaps 4C and 4D. Of the first bottom surface flaps 4A and 4B, the portion excluding the bottom surface insertion portions 6C and 6D is the bottom surface. Since it will be located outside the second flaps 4C and 4D, the bottom surface 1B is formed.

2.2 Formation of Top Surface Of the second top surface flaps 3C and 3D, the second top surface insertion flaps 5A and 5B are not set (second top surface flap 3D in this embodiment). For the top surface, the outer side of the second top surface flap 3D is covered with the first top surface flaps 3A, 3B after being bent to be substantially orthogonal to the side surfaces 1E, 1F (second side surface 1F in the present embodiment). The first flaps 3A and 3B are bent (see FIG. 5).

  Next, in a state where the second top surface flap 3C is bent at a position shifted from the fold line L1 to the front end side, the top side of the second top surface flap 3C is directed to the top surface second flap 3D side. By moving, the top surface insertion portions 5A and 5B are inserted into the top surface insertion holes 5C and 5D (see FIG. 6). The position shifted from the fold line L1 toward the tip side refers to, for example, a position L6 (see FIG. 5) shifted from the fold line L1 to the tip side by about １ ／ of the dimension on the tip side.

  As a result, the top surface insertion portions 5A, 5B enter the inside of the top surface first flaps 3A, 3B, so a part of the top surface second flap 3C (the top surface insertion portion 5A). 5B) is pressed by the first top surface flaps 3A and 3B, and the first top surface flaps 3A and 3B are pressed by the second top surface flap 3C, and the top surface 1A is configured. Is done.

When the top surface 1A is opened, the semicircular recess 5F provided at the tip of the second top surface flap 3C may be pressed in the direction opposite to the insertion direction.
3. Features of the assembly box according to the present embodiment As described above, in the prototype product shown in FIG. 9, it is difficult to aim at the insertion holes 5C and 5D for the top surface, and it is difficult to assemble the second flap 3C for the top surface. However, in this embodiment, the insertion hole dimension W1 and the insertion width dimension W2 are smaller than the dimension Wo between the pair of first side surfaces 1C, 1D, and the top surface insertion holes 5C, 5D and the top surface Since the insertion parts 5A and 5B for use are set at positions shifted from the first side faces 1C and 1D to the center side in the insertion width direction, the insertion parts 5A and 5B for the top surface are inserted into the insertion holes 5C for the top surface, Even if it is inserted into 5D, the top surface insertion portions 5A and 5B do not interfere with the inner wall surfaces of the first side surfaces 1C and 1D.

  Therefore, in this embodiment, the operator does not need to hold the assembly box in a state where the first side surfaces 1C, 1D and the second side surfaces 1E, 1F are orthogonal to each other. It becomes easy to aim at 5D, and the assemblability of the top surface flap can be further improved.

  In the present embodiment, the insertion hole dimension W1 and the insertion width dimension W2 are set to 70% or more and 85% or less of the dimension Wo between the pair of first side surfaces 1C and 1D. This is because as the insertion hole dimension W1 and the insertion width dimension W2 become smaller, the assembly of the top surface flap can be improved, but when the insertion hole dimension W1 and the insertion width dimension W2 become excessively small, This is because the ability to maintain the sealed state decreases.

  In the present embodiment, the top surface insertion holes 5C, 5D are provided by bending a part of the first top surface flaps 3A, 3B to the bottom surface 1B side (inside), and for the top surface. Since the folding line L4 formed when the insertion holes 5C and 5D are provided intersects the insertion direction of the top surface insertion portions 5A and 5B, the top surface insertion portions 5A and 5B are When the top surface second flap 3C is moved so as to be inserted into the surface insertion holes 5C, 5D, a part of the top surface first flaps 3A, 3B is automatically bent inward, and the top surface insertion is performed. Holes 5C and 5D are formed.

  Therefore, it is not necessary to perform the work for forming the top surface insertion holes 5C and 5D in advance before inserting the top surface insertion portions 5A and 5B into the top surface insertion holes 5C and 5D. The workability at the time of inserting the surface insertion portions 5A and 5B into the top surface insertion holes 5C and 5D can be further improved.

  In the present embodiment, since the direction of the center ridge and the direction of the folding line L4 coincide with each other, if the top surface second flap 3C is moved without providing a folding line in advance, the top surface A part of one flap 3A, 3B is automatically folded inward to form a folding line L4.

  Further, in the present embodiment, portions of the first bottom flaps 4A and 4B other than the bottom surface insertion portions 6C and 6D are located outside the bottom surface second flaps 4C and 4D, and the bottom surface insertion portion. Since 6C and 6D are inserted into the bottom surface insertion holes 6A and 6B from the outside, the adjacent flaps are overlapped to form a bowl shape and the adjacent flaps support each other.

  Therefore, since the overlap margin between the flaps after sealing is easier to make than the prototype examination product shown in FIG. 9, the strength of the bottom surface 1B can be improved and the bottom surface 1B can be easily sealed.

  Further, the cutting line C2 for forming the top surface insertion holes 5C, 5D is closer to the insertion direction backward side (folding curve L4 side) and is separated from the distal end side L5 with respect to the insertion direction. As shown in FIG. 10, the dimension of the dimension W3 on the folding line L4 side between the insertion holes 5C and 5D for the top surface is made perpendicular to the folding line L4. It can be larger than the case.

  Therefore, the area between the top surface insertion holes 5C and 5D (the area of the hatched portion shown in FIG. 10) can be increased as compared with the case where the cut line C2 is orthogonal to the folding line L4. Further, it is possible to prevent cracks from growing due to stress concentration at the end of the cut line C2 (folding line L4) and tearing the hatched portion shown in FIG.

(Other embodiments)
In the above-described embodiment, the top surface insertion portions 5A and 5B are set only on the top surface second flap 3C. However, the present invention is not limited to this, and the top surface second flap 3D has a top surface. The surface insertion portions 5A and 5B may be set, and the top surface insertion holes 5C and 5D may be provided in portions corresponding to the top surface first flaps 3A and 3B.

  In the above-described embodiment, the top surface insertion portions 5A and 5B are set on the top surface second flaps 3C and 3D, but the present invention is not limited to this, and the top surface first flaps. The top surface insertion portions 5A and 5B may be set in 3A and 3B, and the top surface insertion holes 5C and 5D may be provided in the top surface second flaps 3C and 3D.

  Further, the present invention is not limited to the above-described embodiment as long as it meets the gist of the invention described in the scope of the utility model registration request.

DESCRIPTION OF SYMBOLS 1 ... Assembly box, 1A ... Top surface, 1B ... Bottom surface, 1C, 1D ... 1st side surface,
1E, 1F ... 2nd side surface, 2 ... sheet material, 2A ... glue margin part,
3A, 3B ... first flap for top surface, 3C, 3D ... second flap for top surface,
4A, 4B ... 1st flap for bottom surface, 4C, 4D ... 2nd flap for bottom surface,
5A, 5B: Top surface insertion part, 5C, 5D: Top surface insertion hole,
6A, 6B ... Bottom insertion hole, 6C, 6D ... Bottom insertion portion.

Claims (4)

A cube-shaped assembly box comprising a top surface, a bottom surface, a pair of first side surfaces facing each other, and a pair of second side surfaces facing each other in a state orthogonal to the first side surfaces by bending the sheet material Because
A first flap for a top surface provided on the first side surface to constitute the top surface;
A second flap for the top surface provided on the second side surface to constitute the top surface;
The top surface first flap is provided with a top surface insertion hole into which the top surface insertion portion set in the top surface second flap is inserted,
When the direction perpendicular to the first side surface is called the insertion width direction,
The dimension between the insertion width direction one end and the other end of the top surface insertion hole, and the dimension between the insertion width direction one end and the other end of the top surface insertion portion, Smaller than the dimension between the pair of first side surfaces,
Furthermore, the top surface insertion hole and the top surface insertion portion are set at positions shifted from the first side surface toward the center side in the insertion width direction.   The dimension between the insertion width direction one end and the other end of the top surface insertion hole, and the dimension between the insertion width direction one end and the other end of the top surface insertion portion, The assembly box according to claim 1, wherein the assembly box is 85% or less of a dimension between the pair of first side surfaces. The top surface insertion hole is provided by bending a part of the top surface first flap to the bottom surface side,
Furthermore, the folding line formed when providing the insertion hole for the top surface intersects with the insertion direction of the insertion portion for the top surface. Assembly box. A first flap for a bottom surface provided on each of the pair of first side surfaces to constitute the bottom surface;
A second flap for a bottom surface provided on each of the pair of second side surfaces to constitute the bottom surface;
A bottom surface insertion hole into which one of the pair of bottom surface first flaps and the pair of bottom surface second flaps is inserted with a bottom surface insertion portion set on the other flap, respectively. And a pair of the bottom insertion holes are set at diagonal positions,
Furthermore, the portion excluding the bottom surface insertion portion of the other flap in which the bottom surface insertion portion is set is located outside the one flap provided with the bottom surface insertion hole, and The assembly box according to any one of claims 1 to 3, wherein the bottom surface insertion portion is inserted into the bottom surface insertion hole from the outside.

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