JP3232979U - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box in which an outer flap can be easily engaged with an inner flap. SOLUTION: A packaging box 1 has a pair of inner notches 21 cut into a pair of inner flaps 14 and a base end of the pair of inner flaps 14 from the vicinity of an abutting portion 21C of the pair of inner notches 21. A pair of reverse folding lines L6 extending so as to incline rearward, and a pair of outer notches 24 cut so as to approach each other from both ends in the left-right direction on the free end side of the front outer flap 15. When the opening is closed, the pair of inner flaps 14 and the front outer flap 15 are bent in this order, and the rear side of the pair of inner flaps 14 is bent toward the side that opens the opening along the reverse folding line L6. In this state, both corners on the free end side of the front outer flap 15 enter from the pair of inner notches 21 to the lower side of the pair of inner flaps 14, and the rear of the pair of inner flaps 14 is closed by its own restoring force. As a result, the pair of outer cut portions 24 mesh with the pair of inner cut portions 21. [Selection diagram] Fig. 3

Description

The present invention relates to a packaging box in which an opening opened in a main body is closed by a pair of inner flaps and a pair of outer flaps.

A box is known in which the top surface can be completely sealed with a pair of inner flaps and a pair of outer flaps (Patent Document 1). The left and right corners of the tip of the outer flap are cut out in an L shape, and a convex closing portion is formed at the center of the tip of the outer flap. A handling hole and a pair of notch grooves are provided in the inner flap, and below the handling hole of the inner flap, there is a C-shaped notch line extending toward the folding line connected to the side surface, and the end of the notch line and the notch groove end. A polygonal curve connecting with is formed. When sealing this box, the outer flap is placed on the upper surface of the inner flap, and the tip of the inner flap is pulled up through the handling hole. Engage with and lock both inner and outer flaps.

Japanese Patent No. 4054976

However, in the above-mentioned box, a large force is required to pull up the inner flap located under the outer flap, and it is not easy for a weak user to handle. Further, when the inner flap is pulled up, the inner flap and the outer flap may rub against each other and be damaged.

In consideration of the above circumstances, the present invention provides a packaging box in which the outer flap can be easily engaged with the inner flap.

The present invention is a packaging box in which an opening opened in the main body is closed by a pair of inner flaps and a pair of outer flaps, and a pair of inner flaps cut from a free end toward a base end. And a pair of reverse folding lines extending from the vicinity of the abutment portion of the pair of the inner cut portions toward the base end of the pair of the inner flaps so as to incline in one direction in the first direction. The opening includes a pair of outer notches cut so as to approach each other from both ends in the second direction orthogonal to the first direction on the free end side of the outer flap located on the other side of the first direction. When the portion is closed, the pair of inner flaps and the outer flap located on the other side of the first direction are bent with respect to the main body portion in this order, and one of the pair of inner flaps in the first direction is the reverse. In a state of being bent along the folding line to the side where the opening is opened, both corners on the free end side of the outer flap enter from the pair of inner notches to the lower side of the pair of inner flaps, and a pair. When one of the inner flaps in the first direction is closed by its own restoring force, the pair of outer cut portions mesh with the pair of inner cut portions, and then the outer cut portion located in one of the first directions is engaged. The flap is bent with respect to the main body portion.

In this case, each of the inner cut portions is formed by cutting out a part of the inner flap on the free end side, and is one side of the first direction and the other end portion in the first direction. It has a proximal edge portion as a side, the proximal edge portion extends along a second direction, and the tip edge portion extends from the abutting portion toward the free end of the inner flap. It may be tilted in one direction.

In this case, the object to be packaged is housed in the main body portion before the pair of the inner flaps are bent, and the pair of the inner flaps come into contact with or approach the packaged object housed in the main body portion when bent. You may.

In this case, in one of the first directions of each of the inner flaps, a handle portion for handling when bending along the reverse folding line may be recessed or convex.

According to the present invention, the outer flap can be easily engaged with the inner flap.

It is a perspective view which shows the packaging box which concerns on one Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on one Embodiment of this invention. FIG. 5 is a perspective view showing a process of temporarily fixing an inner flap and a front outer flap in a packaging box according to an embodiment of the present invention. FIG. 5 is a perspective view showing a state in which an inner flap and a front outer flap are temporarily fixed in a packaging box according to an embodiment of the present invention. It is a packaging box which concerns on one Embodiment of this invention, and is the perspective view which shows the process of closing a rear outer flap.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Fr, Rr, L, R, U, and D shown in the drawings indicate front, rear, left, right, top, and bottom. The front-back direction, the left-right direction, and the up-down direction are orthogonal to each other. In the present specification, the front-rear direction is an example of the first direction, and the left-right direction is an example of the second direction. Although terms indicating directions and positions are used in the present specification, these terms are used for convenience of explanation and do not limit the technical scope of the present invention. In addition, the terms indicating the direction and position are mainly based on the direction and position in the state where the packaging box is assembled and used.

The packaging box 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a packaging box 1. FIG. 2 is a plan view showing a blank 1A of the packaging box 1.

As shown in FIG. 1, the packaging box 1 includes a main body 1B for accommodating an object to be packaged M (see FIG. 3 and the like), and a plurality of flaps 14 to 16 for closing an opening opened in the main body 1B. I have. The packaging box 1 is formed in a thin rectangular parallelepiped shape having a thickness (height) shorter than the dimensions in the front-rear direction and the left-right direction. The packaging box 1 is, for example, a so-called post-in box formed so as to be mailable in a mail box. The height of the packaging box 1 is preferably 30 mm or less that can be posted in a general mail box, but the technical scope of the present invention does not exclude the packaging box 1 having a height exceeding 30 mm. ..

The packaging box 1 is formed by assembling the blank 1A shown in FIG. The blank 1A is formed by punching a sheet of paper corrugated cardboard sheet by punching or the like. The corrugated cardboard sheet is, for example, a double-sided corrugated cardboard sheet in which a front liner 9B and a back liner 9C (see also FIG. 3) are bonded to a corrugated cardboard 9A. Note that FIG. 2 shows the front liner 9B side (outer surface of the packaging box 1). In the present specification, the direction parallel to the corrugated cardboard sheet 9A is referred to as the "step direction", and the direction orthogonal to the step direction is referred to as the "flow direction". “X” shown in the drawing indicates “step direction”, and “Y” indicates “flow direction”.

[blank]
As shown in FIG. 2, the blank 1A includes a bottom wall 10, a pair of side walls 11, a front wall 12, a rear wall 13, a pair of inner flaps 14, and a pair of outer flaps 15, 16. ing. Since the pair of side walls 11 and the pair of inner flaps 14 are each formed line-symmetrically in the step direction (left-right direction) with the bottom wall 10 as the center, one side wall is not specified below. 11 and one inner flap 14 will be described.

<Bottom wall, side wall, front wall, rear wall>
The bottom wall 10 is formed in a substantially rectangular shape that is long in the step direction. The pair of side walls 11 are connected to both ends of the bottom wall 10 in the step direction via the first folding curve L1. The front wall 12 and the rear wall 13 are connected to both ends of the bottom wall 10 in the flow direction via the second folding curve L2. The side wall 11, the front wall 12, and the rear wall 13 are each formed in a substantially rectangular shape.

<Inner flap>
The pair of inner flaps 14 are connected to the tips of the pair of side walls 11 in the step direction via the third folding curve L3. The inner flap 14 is formed in a substantially rectangular shape. An insertion hole 20 is cut in one of the flow directions (first direction) of the inner flap 14 along the boundary with the side wall 11 (third folding curve L3). The intermediate portion of the inner flap 14 excluding both sides in the flow direction projects outward in the step direction (second direction) and is widely formed. The inner flap 14 (wide portion) is formed with an inner cut portion 21 and a handle portion 22. Further, a reverse polygonal line L6 is formed on the inner flap 14 so as to cross diagonally.

(Inscribed circle)
The inner cut portion 21 is formed on the other side (front) of the center (insertion hole 20) of the inner flap 14 in the flow direction. The inner cut portion 21 is cut from the free end of the inner flap 14 toward the base end. Specifically, the inner cut portion 21 is formed by cutting out a part of the inner flap 14 on the free end side in a substantially triangular shape. The inner cut portion 21 includes a tip edge portion 21A which is one (rear) side in the flow direction, a proximal edge portion 21B which is the other (front) side in the flow direction, and a distal edge portion 21A and a proximal edge. It has an abutting portion 21C that connects the portions 21B. The base end edge portion 21B extends substantially parallel to the step direction. Specifically, the proximal edge portion 21B is slightly inclined from the abutting portion 21C toward the free end of the inner flap 14 toward the other side (forward) in the flow direction. The tip edge portion 21A is inclined in one direction (rearward) in the flow direction from the abutting portion 21C toward the free end of the inner flap 14. When a line parallel to the step direction passing through the abutting portion 21C is used as the reference line, the inclination angle of the tip edge portion 21A with respect to the reference line is larger than the inclination angle of the base end edge portion 21B with respect to the reference line. The abutting portion 21C is the bottom edge of the inner notch portion 21 and is formed parallel to the flow direction.

(Reverse polygonal line)
The reverse folding line L6 extends from the vicinity of the abutting portion 21C of the pair of inner cut portions 21 toward the base end of the pair of inner flaps 14 so as to incline in one (rear) direction in the flow direction. Specifically, the reverse folding line L6 is formed so as to connect the intersection of the tip edge portion 21A and the abutting portion 21C and the other end (front end) of the insertion hole 20 in the flow direction. The reverse polygonal line L6 is a reverse ruled line obtained by crushing a corrugated cardboard sheet from the front liner 9B side in the thickness direction. The reverse folding line L6 has a function of bending (reverse folding) the corrugated cardboard sheet so that the front liner 9B faces inward. The reverse folding line L6 is not limited to the reverse ruled line, and may be any structure as long as the corrugated cardboard sheet can be reverse-folded, such as a perforation in which a plurality of cuts are formed at predetermined intervals.

(Handling part)
The handle portion 22 is recessed in the free end portion of the inner flap 14 at a position facing the insertion hole 20 on one side (rear side) of the flow direction with respect to the inner cut portion 21. The handle portion 22 is an arc-shaped recess formed in the inner flap 14. Although the details will be described later, the handle portion 22 is a portion to be touched (by the user) when the inner flap 14 is bent along the reverse folding line L6.

<Outer flap>
The pair of outer flaps 15 and 16 are connected to the tip of the front wall 12 and the rear wall 13 in the flow direction via the fourth folding curve L4. In the present specification, for convenience of explanation, the outer flap 15 (located on the other side in the first direction) connected to the front wall 12 is referred to as "front outer flap 15" and is connected to the rear wall 13. The outer flap 16 (located in one of the first directions) is referred to as the "rear outer flap 16", and in the description common to the front outer flap 15 and the rear outer flap 16, it is simply referred to as the "outer flaps 15 and 16". And.

<Front outer flap>
The front outer flap 15 is formed in a substantially rectangular shape. The dimension of the front outer flap 15 in the flow direction is about half of the dimension of the bottom wall 10 in the flow direction.

(Outer notch)
A pair of outer cut portions 24 are cut on the free end side of the front outer flap 15 so as to approach each other from both ends in the flow direction of the front outer flap 15. To be described in detail, a pair of outer base end edge portions 24B are formed by diagonally cutting corners at both corner portions on the free end side of the front outer flap 15. A pair of engaging protrusions 23 are projected outward in the flow direction on both sides of the free end of the front outer flap 15 in the step direction. Further, the pair of engaging protrusions 23 are formed so as to protrude toward both outer sides in the step direction, and the protruding portion of each engaging protrusion 23 has an outer notch portion between the outer base end edge portion 24B and the outer base end edge portion 24B. The outer tip edge portion 24A constituting 24 is formed. The outer base end edge portion 24B and the outer tip edge portion 24A are inclined line-symmetrically with respect to a reference line parallel to the step direction passing through the outer abutment portion 24C, and the outer notch portion 24 is formed in a substantially V shape. Has been done.

<Rear outer flap>
The rear outer flap 16 is formed in a substantially rectangular shape. The dimension of the rear outer flap 16 in the flow direction is set longer than the dimension of the front outer flap 15 in the flow direction. Although the details will be described later, the free end side of the rear outer flap 16 overlaps the free end side of the front outer flap 15 in the assembled (sealed) state of the packaging box 1.

(Insert piece)
A pair of insertion pieces 25 are continuously provided at both ends of the rear outer flap 16 in the step direction via a fifth folding curve L5. Each of the insertion pieces 25 is formed in a droplet shape that gradually widens in the step direction from one of the flow directions to the other. The pair of insertion pieces 25 are inserted into the pair of insertion holes 20 in a state where the packaging box 1 is assembled (sealed).

The second fold curve L2, the third fold curve L3, and the fifth fold curve L5 are general-purpose ruled lines obtained by crushing a corrugated cardboard sheet from the back liner 9C side in the thickness direction. Further, the first folding curve L1 and the third folding curve L3 are lead ruled lines in which a plurality of cuts are formed at predetermined intervals on a general-purpose ruled line. The general-purpose ruled line and the lead ruled line have a function of bending (normally folding) the corrugated cardboard sheet so that the back liner 9C faces inward. The first to fifth folding curves L1 to L5 are not limited to general-purpose ruled lines and lead rules, and may be any structure such as perforations that can normally fold a corrugated cardboard sheet.

[Assembly of packaging box]
Next, the assembly work (sealing work) of the packaging box 1 will be described with reference to FIGS. 1, 3 to 5. FIG. 3 is a perspective view showing a process of temporarily fixing the inner flap 14 and the front outer flap 15. FIG. 4 is a perspective view showing a state in which the inner flap 14 and the front outer flap 15 are temporarily fixed. FIG. 5 is a perspective view showing a process of closing the rear outer flap 16. Here, an example in the case where the worker manually assembles the packaging box 1 will be described.

The operator has the back liner 9C of the blank 1A facing upward, and for example, three objects to be packaged M are arranged side by side in the left-right direction and arranged on the bottom wall 10 (see FIG. 3). Subsequently, the operator bends the pair of side walls 11 upward along the first folding curve L1 and the pair of inner flaps 14 inward along the third folding curve L3 (see FIG. 3). The pair of side walls 11 are in contact with or close to both left and right sides of the object to be packaged M, and the pair of inner flaps 14 are in contact with or close to both left and right sides of the upper surface of the object to be packaged M. Further, a slight opening is formed on the upper surface of the inner flap 14 along the insertion hole 20. In FIG. 3 and the like, as an example, the three objects to be packaged M are arranged side by side in the left-right direction, but the size, number, and arrangement of the objects to be packaged M may be freely changed.

Next, as shown in FIG. 3, the operator bends the front wall 12 upward along the second folding curve L2 and the front outer flap 15 backward along the fourth folding curve L4 (in FIG. 3). See the arrow shown by the solid line). The front wall 12 is in contact with or close to the front side surface of the object to be packaged M. The front outer flaps 15 overlap the surfaces of the pair of inner flaps 14 and come into contact with or approach the front side of the upper surface of the object to be packaged M.

As described above, the main body 1B surrounding the three sides (left, right, front) of the object to be packaged M is formed, and a part (left and right sides and front side) of the opening opened on the upper surface of the main body 1B is closed.

By the way, since the walls 11, 12, 14 to 16 bent as described above are not fixed, when the operator releases the hands, these walls 11, 12, 14 to 16 have the restoring force of the bent portion ( It will be deployed by the elastic force). In the packaging box 1 according to the present embodiment, the pair of inner flaps 14 and the front outer flaps 15 are temporarily fixed in order to prevent unfolding due to the restoring force as described above.

The operator hangs a hand (finger) on the pair of handle portions 22 and pulls up the rear of the pair of inner flaps 14 (see the arrow shown by the broken line in FIG. 3). Then, the rear side (one of the first directions) of the pair of inner flaps 14 is reverse-folded along the reverse folding line L6 (folded to the side where the opening is opened). In this state, the operator causes both corners (a pair of engaging protrusions 23) on the free end side of the front outer flap 15 to enter the lower side of the pair of inner flaps 14 from the pair of inner notches 21.

After that, when the operator releases the hand from the pair of handle portions 22, as shown in FIG. 4, the rear side of the pair of inner flaps 14 is closed by its own restoring force (restoring force of the bent portion at the reverse folding line L6). (See the arrow shown by the alternate long and short dash line in FIG. 4). Then, the pair of outer cut portions 24 mesh with the pair of inner cut portions 21. In this state, the tip edge portion 21A of the inner cut portion 21 is arranged on the surface of the front outer flap 15 (engagement protrusion 23), and the base end edge portion 21B of the inner cut portion 21 is the front outer flap 15. Arranged on the back surface side, the abutting portion 21C of the inner notch 21 is in contact with or close to the outer abutment 24C of the outer notch 24.

As described above, the pair of inner flaps 14 and the front outer flaps 15 are temporarily fixed (engaged).

Next, when the operator bends the rear wall 13 upward along the second folding curve L2, the rear wall 13 comes into contact with or approaches the rear side surface of the object to be packaged M. As a result, the main body 1B is completed. Subsequently, as shown in FIG. 5, the operator bends the pair of insertion pieces 25 forward (or downward) along the fifth folding curve L5, and bends the rear outer flap 16 along the fourth folding curve L4. Bend forward. The rear outer flap 16 is bent with respect to the main body 1B while inserting the pair of insertion pieces 25 into the insertion holes 20 opened in the pair of inner flaps 14. When the insertion piece 25 is completely inserted into the insertion hole 20, the rear outer flap 16 overlaps the surface of the pair of inner flaps 14 and the front outer flap 15 and contacts or approaches the upper surface of the object to be packaged M (). (See FIG. 1). The tip side (front side) of the rear outer flap 16 is laminated on the tip side (rear side) of the front outer flap 15.

As a result, the entire opening of the main body 1B is closed (see FIG. 1). As a result, the packaging box 1 is substantially sealed.

Finally, as shown in FIG. 1, the operator attaches the invoice S so as to extend from the rear outer flap 16 to the front outer flap 15. As a result, the packaging box 1 is sealed.

In the packaging box 1 according to the present embodiment described above, when the opening of the main body 1B is closed, the pair of inner flaps 14 and the front outer flaps 15 are bent with respect to the main body 1B in this order, and the pair of inner flaps 14 and the front outer flaps 15 are bent with respect to the main body 1B. With the rear of the flap 14 reverse-folded along the reverse folding line L6, both corners on the free end side of the front outer flap 15 enter from the pair of inner notches 21 to the lower side of the pair of inner flaps 14, and the pair The rear side of the inner flap 14 is closed by its own restoring force, so that the pair of outer cut portions 24 mesh with the pair of inner cut portions 21. According to this configuration, by reverse-folding the rear of the pair of inner flaps 14 along the reverse folding line L6, both corner portions (pair of engaging protrusions 23) of the front outer flaps 15 interfere with the pair of inner flaps 14. It can be inserted under the pair of inner flaps 14 without any need. Further, the pair of reversely folded inner flaps 14 naturally return to their original positions, so that the outer cut portion 24 can be engaged with the inner cut portion 21. As a result, a large force is not required when engaging the front outer flap 15 with the inner flap 14, the front outer flap 15 and the inner flap 14 are prevented from being rubbed and damaged, and the front outer flap 15 can be easily moved into the inner flap 15. It can be engaged with the flap 14.

Further, according to the packaging box 1 according to the present embodiment, since the tip edge portion 21A of the inner notch portion 21 is formed so as to be inclined rearward from the abutting portion 21C toward the free end of the inner flap 14, the inner flap is formed. Both corners of the front and outer flaps 15 can be easily arranged in the inner notch 21 by slightly folding the 14 in the reverse direction. Further, the base end edge portion 21B of the inner cut portion 21 was extended along the left-right direction (step direction). As a result, the base end edge portion 21B is substantially orthogonal to the direction in which the front outer flap 15 is pulled forward, so that the front outer flap 15 is moved forward while the outer cut portion 24 is engaged with the inner cut portion 21. It can be made difficult to pull out.

Further, in the packaging box 1 according to the present embodiment, the object to be packaged M is housed in the main body 1B before the pair of inner flaps 14 are bent, and the pair of inner flaps 14 are housed in the main body 1B when bent. The structure is such that the packaged object M is in contact with or close to the packaged object M. According to this configuration, the object to be packaged M can be packaged so as to wrap it. Further, even when the object to be packaged M is housed in the main body 1B, the rear side of the inner flap 14 can be bent so as to open an opening at the reverse folding line L6. As a result, even when the object to be packaged M is housed in the main body portion 1B, the corner portion of the front outer flap 15 is made to enter the inner cut portion 21, and the outer cut portion 24 is bitten into the inner cut portion 21. Can be matched.

Further, according to the packaging box 1 according to the present embodiment, since the handle portion 22 is formed on the inner flap 14, the user can easily pull up the rear side of the inner flap 14 by hooking a hand (finger) on the handle portion 22. be able to. Further, since the insertion hole 20 is opened in the inner flap 14, the rigidity of the inner flap 14 is weakened, and the handle portion 22 is formed at a position facing the insertion hole 20, so that the rear side of the inner flap 14 is reversed. The folding line L6 can be easily folded in the reverse direction. As a result, the work of engaging the inner cut portion 21 and the outer cut portion 24 can be easily performed.

In the packaging box 1 according to the present embodiment, the base end edge portion 21B of the inner cut portion 21 is extended substantially parallel to the step direction, but the present invention is not limited to this, and the direction is opposite to the tip edge portion 21A. It may be inclined to (not shown). Further, in the packaging box 1 according to the present embodiment, the outer tip edge portion 24A of the outer notch portion 24 is inclined, but the present invention is not limited to this, and the packaging box 1 may be extended substantially parallel to the step direction (shown). Z). Further, the base end edge portion 21B of the inner cut portion 21 and the outer tip edge portion 24A of the outer cut portion 24 are formed parallel to each other (may be inclined or may be parallel to the step direction), and the inner cut portion 21 is formed. When the incision portion 21 and the outer notch portion 24 are meshed with each other, the base end edge portion 21B and the outer tip edge portion 24A may be in line contact (surface contact) (not shown).

Further, in the packaging box 1 according to the present embodiment, the inner cut portion 21 is configured by cutting out the inner flap 14 in a substantially triangular shape, but the present invention is not limited to this. For example, the inner cut portion 21 may be a single cut extending linearly from the free end of the inner flap 14 toward the base end (not shown). Similarly, the outer cut portion 24 may be a single cut extending linearly from the left and right ends of the front outer flap 15 toward the center (not shown).

Further, in the packaging box 1 according to the present embodiment, the reverse folding line L6 is formed so as to connect the intersection of the tip edge portion 21A and the abutting portion 21C and the front end of the insertion hole 20. Is not limited to this. For example, the reverse polygonal line L6 may extend from the intersection of the base end edge portion 21B and the abutting portion 21C, or may extend from the center in the front-rear direction of the abutting portion 21C (not shown). Further, for example, the reverse folding line L6 may extend from the vicinity of the abutting portion 21C to the rear end or the middle of the insertion hole 20 (not shown).

Further, in the packaging box 1 according to the present embodiment, the insertion hole 20 is formed in the inner flap 14 and the insertion piece 25 is formed in the rear outer flap 16, but the present invention is not limited to this. For example, the inner flap 14 may be cut to form an insertion piece (not shown), and the insertion piece may be inserted into an insertion hole (not shown) opened in the rear outer flap 16. Further, the insertion hole 20 and the insertion piece 25 may be omitted (not shown).

Further, in the packaging box 1 according to the present embodiment, the handle portion 22 is recessed in the free end portion of the inner flap 14, but the present invention is not limited to this, and the handle portion is projected from the free end of the inner flap 14. May be (not shown).

Further, in the packaging box 1 according to the present embodiment, a pair of engaging protrusions 23 are formed on the front outer flap 15, but the present invention is not limited to this. A pair of engaging protrusions 23 may be omitted, and a pair of outer notches 24 may be formed on the left and right sides of the tip side of the substantially square front outer flap 15 (not shown).

Further, in the packaging box 1 according to the present embodiment, the rear outer flap 16 overlaps the tip end side of the front outer flap 15 in the sealed state, but the present invention is not limited to this. The rear outer flap 16 may be formed so as to cover substantially the entire front outer flap 15, or the tips of the rear outer flap 16 and the front outer flap 15 may be butted against each other (not shown).

Further, in the packaging box 1 according to the present embodiment, the rear outer flap 16 is fixed to the front outer flap 15 by attaching the invoice S, but the present invention is not limited to this. For example, the rear outer flap 16 may be fixed to the front outer flap 15 with an adhesive, double-sided tape, adhesive tape, or the like (not shown).

Further, when assembling the packaging box 1 according to the present embodiment, the object to be packaged M is housed in the main body 1B before the pair of inner flaps 14 are bent, but the present invention is not limited to this. For example, the object to be packaged M may be housed in the main body 1B with the pair of inner flaps 14 and the front outer flaps 15 temporarily fixed, and then the rear outer flaps 16 may be closed.

Further, the packaging box 1 according to the present embodiment is formed of a double-sided corrugated cardboard sheet made of paper, but the present invention is not limited to this, and a single-sided corrugated cardboard sheet, a double-sided corrugated cardboard sheet, a thick paper, or a resin plate (sheet). Etc. may be formed. Further, the model of the packaging box 1, the dimensions (width, depth, height) and shape of each part of the packaging box 1, the thickness of the corrugated cardboard sheet, the direction in which the inner shin 9A extends, and the like may be freely changed.

The description of the above embodiment shows one aspect of the packaging box according to the present invention, and the technical scope of the present invention is not limited to the above embodiment. The technical scope of the present invention is not limited to the above embodiment. The present invention may be variously modified, replaced, or modified without departing from the spirit of the technical idea, and the scope of the utility model registration claim includes all embodiments that can be included within the scope of the technical idea. ..

1 Packaging box 1B Main body 14 Inner flap 15 Front outer flap (outer flap)
16 Rear outer flap (outer flap)
21 Inner cut 21A Tip edge 21B Base edge 21C Abutment 22 Handle 24 Outer cut L6 Reverse folding line M Packaged object

Claims (4)

A packaging box (1) in which an opening opened in the main body (1B) is closed by a pair of inner flaps (14) and a pair of outer flaps (15, 16).
A pair of inner notches (21) cut from the free end of the pair of inner flaps toward the base end, and a pair of inner notches (21).
A pair of reverse folding lines (L6) extending from the vicinity of the abutment portion (21C) of the pair of inner cut portions so as to incline in one direction in the first direction toward the base end of the pair of inner flaps.
A pair of outer cut portions (24) cut so as to approach each other from both ends of the second direction orthogonal to the first direction on the free end side of the outer flap located on the other side of the first direction are provided. ,
When closing the opening, the pair of inner flaps and the outer flap located on the other side of the first direction are bent with respect to the main body in this order, and one of the pair of inner flaps in the first direction is bent. In a state of being bent along the reverse folding line to the side where the opening is opened, both corners on the free end side of the outer flap enter from the pair of inner notches to the lower side of the pair of inner flaps. When one of the pair of inner flaps in the first direction is closed by its own restoring force, the pair of outer cuts mesh with the pair of inner cuts and are subsequently located in one of the first directions. A packaging box characterized in that the outer flap is bent with respect to the main body portion. Each of the inner cut portions is formed by cutting out a part of the inner flap on the free end side, and serves as one side in the first direction, that is, the tip edge portion (21A) and the other in the first direction. It has a proximal edge (21B) that serves as a side, and has.
The proximal edge is extended along the second direction.
The packaging box according to claim 1, wherein the tip edge portion is inclined in one direction in the first direction from the abutting portion toward the free end of the inner flap. Before the pair of inner flaps are bent, the object to be packaged (M) is housed in the main body portion.
The packaging box according to claim 1 or 2, wherein the pair of inner flaps come into contact with or approach the object to be packaged contained in the main body when the inner flaps are bent. Claims 1 to 3 are characterized in that, in one of the first directions of each of the inner flaps, a handle portion (22) for handling when bending along the reverse folding line is recessed or convex. The packaging box according to any one of the above.

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