JP3228467U - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box which can be easily disassembled. SOLUTION: A corrugated cardboard tray 1 (packaging box) is connected to a pair of end walls 11 erected with respect to a bottom wall 10 via a second folding curve L2, and is connected to the bottom wall 10. A pair of side walls 16 connected to a pair of end walls 11 in a state of being erected with respect to 10 are provided, and a dismantling cutting line 21 for dividing the side wall 16 is formed on each side wall 16. In the four corner regions of the bottom wall 10, four auxiliary cut lines 22 extend diagonally from the corners of the bottom wall 10 toward the central region of the bottom wall 10, and each auxiliary cut line 22 is the range of the virtual circular region. By tilting the pair of end walls 11 to the outside, each side wall 16 divided by the dismantling cutting line 21 is tilted together with the end wall 11 while being separated from the bottom wall 10, and each auxiliary The cut line 22 interrupts the peeling of the liner 9C of the bottom wall 10 that progresses with the tilting of the divided side wall 16. [Selection diagram] Fig. 5

Description

The present invention relates to a cardboard packaging box.

There is known a cardboard body box (packaging box) in which a pair of first side walls and a pair of second side walls are erected on the peripheral edge of the bottom wall (Patent Document 1). Each first side wall was adhered (fixed) to an edge side wall connected to the second side wall.

Utility Model Registration No. 3212843

When dismantling the above-mentioned body box, the first side wall had to be peeled off from the edge side wall, and a large force was required for the dismantling work, so that it could not be easily disassembled.

In order to solve the above problem, the following configuration can be considered. For example, as shown in FIG. 7A, in the body box 100, a disassembly cutting line 105 extending in the vertical direction is formed on the first side wall 102, and the first side wall 102 is used as a connecting portion 102A with the edge side wall 104 and a non-connecting portion. Partition. Then, as shown in FIG. 7B, by tilting the pair of second side walls 103 (edge side walls 104) outward (only one side is shown in FIG. 7B), the first side wall 102 divided by the disassembly cutting line 105 is formed. The connecting portion 102A of the above is tilted together with the edge side wall 104 while being separated from the bottom wall 101. As a result, the body box 100 can be disassembled without peeling the first side wall 102 from the edge side wall 104.

However, as shown in FIG. 7B, in this body box 100, when the connecting portion 102A of the first side wall 102 is tilted to separate from the bottom wall 101, the connecting portion 102A is peeled off from the liner 106 inside the bottom wall 101. You may be inclined. Since the connecting portion 102A is connected to the second side wall 103 by the peeled liner 106, the connecting portion 102A and the edge side wall 104 tilt with respect to the second side wall 103 in a bent posture. Therefore, after tilting the second side wall 103 and the like, the peeled liner 106 had to be torn and the edge side wall 104 and the like had to be tilted so as to be parallel to the second side wall 103. That is, there is a problem that it takes a lot of time and effort to disassemble the body box 100.

The present invention provides a packaging box that can be easily disassembled in order to solve the above problems.

The present invention is a cardboard packaging box in which a liner is attached to the inside, and is connected to the bottom wall and both ends of the bottom wall in the first direction via a first folding curve, and the first folding. A pair of end walls that are erected with respect to the bottom wall by being bent along a curve, and a pair of end walls that are connected to both ends of the bottom wall in a second direction orthogonal to the first direction via a second folding curve. Each of the side walls is provided with a pair of side walls that are erected with respect to the bottom wall by being bent along the second folding curve and connected to the pair of end walls in the erected state. At least one dismantling cut line for dividing the side wall is formed in, and in each of the four corner regions of the bottom wall, auxiliary cut lines are directed from the corners of the bottom wall to the central region of the bottom wall. Each of the auxiliary cut lines is at least centered on the corner portion, and the distance from the corner portion to the intersection of the rift and the second folding curve when cut by the dismantling cut line. By tilting the pair of end walls to both outer sides, each of the side walls divided by the dismantling cutting line is separated from the bottom wall and described as described above. Tilted with the end walls, each auxiliary cut line interrupts the liner peeling of the bottom wall that progresses with the tilting of the split side wall.

In this case, each of the side walls is connected to a wall main body portion forming an intermediate region in the first direction and a pair of connections connected to both sides of the wall main body portion in the first direction and connected to the pair of end walls. The dismantling cutting line is formed between the wall main body portion and the pair of connecting portions, and the pair of end walls are tilted outward on both sides to form the dismantling cutting line. Each of the connecting portions divided from the wall main body portion is tilted together with the end wall while being separated from the bottom wall, and each of the auxiliary cut lines advances with the tilting of the connecting portion. The peeling of the liner on the wall may be interrupted.

In this case, the wall body portion is formed to be lower than the height of the connection portion, the connection portion is formed to a height equal to or lower than the height of the end wall, and the wall body portion and the pair of the connection portions are formed. In the range surrounded by, an opening having a pair of bent portions is formed, and in each of the side walls, the pair of dismantling cutting lines may extend downward from the pair of the bent portions.

In this case, two pairs of reinforcing walls connected to both ends of the pair of end walls in the second direction are further provided, and each of the reinforcing walls is bent with respect to the end wall and is on the second folding curve. The first reinforcing portion erected in the above, the second reinforcing portion that is folded back to the first reinforcing portion and fixed to the inner surface of the first reinforcing portion, and the second reinforcing portion that is bent with respect to the second reinforcing portion. It has an abutting portion that abuts on the inner surface of the end wall, and each of the side walls is connected to the end wall via the reinforcing wall by being fixed to the outer surface of the first reinforcing portion. May be good.

According to the present invention, the packaging box can be easily disassembled.

It is a perspective view which shows the tray which concerns on one Embodiment of this invention. It is a top view which shows the blank of the tray which concerns on one Embodiment of this invention. It is an enlarged plan view which shows a part of the blank of the tray which concerns on one Embodiment of this invention. It is a top view explaining the assembly procedure of the tray which concerns on one Embodiment of this invention. It is a perspective view explaining the disassembly procedure of the tray which concerns on one Embodiment of this invention. It is a perspective view which shows the state which disassembled the tray which concerns on one Embodiment of this invention. It is a perspective view which shows the conventional body box. It is a perspective view which shows the state which the conventional body box was disassembled.

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. Further, the left-right direction (first direction), the front-back direction (second direction), and the up-down direction are orthogonal to each other. 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 based on the direction and position of the tray (packaging box) in the assembled state.

[Tray configuration]
The tray 1 according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing the tray 1. FIG. 2 is a plan view showing a blank 1A of the tray 1. FIG. 3 is an enlarged plan view showing a part of the blank 1A of the tray 1.

As shown in FIG. 1, the tray 1 as an example of the packaging box is a corrugated cardboard box formed in a substantially rectangular parallelepiped shape. The tray 1 has three consecutive surfaces (front surface, rear surface, and upper surface) open.

The tray 1 is formed by assembling the blank 1A shown in FIG. The blank 1A is formed by punching a sheet of paper corrugated cardboard with a die 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 FIG. 1) are bonded to a wavy inner shin 9A. Note that FIGS. 2 and 3 show the front liner 9B side. 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” 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 end walls 11, two pairs of reinforcing walls 12, and a pair of side walls 16. In FIG. 2, the pair of end walls 11 and the pair of reinforcing walls 12 are formed vertically symmetrically, and the pair of side walls 16 and the pair of reinforcing walls 12 connected to the one end wall 11 are formed symmetrically. Therefore, in the following description, one part will be described unless it is clearly stated that there is a pair or two pairs. In addition, a pair or two pairs of parts will be described mainly focusing on one part.

<Bottom wall, end wall>
The bottom wall 10 and the end wall 11 are formed in a substantially rectangular shape that is longer in the step direction than in the flow direction. The pair of end walls 11 are connected to both ends of the bottom wall 10 in the step direction (first direction) via the first folding curve L1. The bottom wall 10 and the pair of end walls 11 are arranged side by side in a row in the step direction.

<Reinforcing wall>
The reinforcing wall 12 has a substantially rectangular outer shape. The two pairs of reinforcing walls 12 are connected to both ends of the pair of end walls 11 in the flow direction (second direction). The pair of reinforcing walls 12 and the end walls 11 are arranged side by side in a row in the flow direction.

The reinforcing wall 12 has a first reinforcing portion 13, a second reinforcing portion 14, and a contact portion 15. The first reinforcing portion 13, the second reinforcing portion 14, and the contact portion 15 are formed in a substantially rectangular shape elongated in the step direction. The first reinforcing portion 13 is continuously provided at the end portion of the end wall 11 in the flow direction via the third folding curve L3. The second reinforcing portion 14 is continuously provided at the tip of the first reinforcing portion 13 in the flow direction via the fourth folding curve L4. The contact portion 15 is continuously provided at the tip of the second reinforcing portion 14 in the flow direction via the fifth folding curve L5.

<Wall side>
The pair of side walls 16 are connected to both ends of the bottom wall 10 in the flow direction (second direction) via a second folding curve L2. The side wall 16 has a wall main body 17 forming an intermediate region in the step direction, and a pair of connecting portions 18 connected to both sides of the wall main body 17 in the step direction. The wall main body portion 17 has a substantially rectangular outer shape, and is formed to be lower (shorter) than the height (dimension in the flow direction) of the connecting portion 18. The connecting portion 18 has a substantially rectangular outer shape, and is formed to be lower (shorter) than the height (dimension in the step direction) of the end wall 11. As a specific example, the height of the connecting portion 18 is set to approximately half the height of the end wall 11 (reinforcing wall 12), and the height of the wall main body portion 17 is set to approximately half the height of the connecting portion 18. There is. The height of the connecting portion 18 is substantially the same as the dimension (extended dimension) of the reinforcing wall 12 in the flow direction.

As described above, since there is a step between the wall main body 17 and the pair of connecting portions 18, a pair of bent portions 20A are provided in the range surrounded by the wall main body 17 and the pair of connecting portions 18. The opening 20 to have is formed. That is, the side wall 16 is formed in a substantially U shape as a whole by cutting out the opening 20 from the tip.

(Dismantling cutting line)
A pair of dismantling cutting lines 21 for dividing the side wall 16 is formed on each side wall 16. The pair of dismantling cutting lines 21 are formed between the wall body portion 17 and the pair of connecting portions 18. Specifically, the pair of dismantling cutting lines 21 extend downward (bottom wall 10 side) from the pair of bent portions 20A. More specifically, the pair of dismantling cutting lines 21 extends from the vicinity of the pair of bent portions 20A to the vicinity of the second folding curve L2 with a slight inclination so as to be separated from each other from the upper side to the lower side. Has been done. The dismantling cutting line 21 is a zipper in which a plurality of substantially L-shaped cuts are arranged, and has a function of cutting the wall main body 17 from above to below.

<Auxiliary cut line>
Auxiliary cut lines 22 extend diagonally from the corner P1 of the bottom wall 10 toward the central region of the bottom wall 10 in each of the four corner regions of the bottom wall 10. As a specific example, each auxiliary cut line 22 is formed linearly at an angle of 45 degrees with respect to the first folding curve L1 (or the second folding curve L2). Each auxiliary cut line 22 is a so-called half-cut line, and is formed by cutting only the back liner 9C of the bottom wall 10 or cutting from the back liner 9C side to about half the thickness of the cardboard sheet. In FIG. 2, since the four auxiliary cut lines 22 are formed symmetrically in the front-back and left-right directions, one auxiliary cut line 22 will be described in the following description unless it is clearly stated that the number is four. To do.

As shown in FIG. 3, each auxiliary cut line 22 is formed within the range of a substantially 1/4 circular virtual circle region 23 set in the corner region of the bottom wall 10. To be precise, the auxiliary cut line 22 extends slightly outward from the virtual circular region 23. The virtual circle region 23 is a tentatively assumed region, and is a rift (see the dotted line in FIG. 3) and a second portion when the corner portion P1 of the bottom wall 10 is centered and the corner portion P1 is cut along the dismantling cutting line 21. This is a region where the distance to the intersection P2 with the folding curve L2 is the radius R1. The rift when cut along the dismantling cutting line 21 is not necessarily formed along the dotted line shown in FIG. 3, and may deviate slightly from the dotted line. Therefore, although the position of the intersection P2 may be slightly deviated, it is preferable that the intersection P2 is set so that the radius R1 is maximized.

The first to fourth folding curves L1 to L4 are general-purpose ruled lines obtained by crushing a corrugated cardboard sheet from the back liner 9C side in the thickness direction. The general-purpose ruled line has a function of bending (normally folding) the cardboard sheet so that the back liner 9C faces inward. The fifth folding curve L5 is a reverse ruled line obtained by crushing a corrugated cardboard sheet from the front liner 9B side in the thickness direction. The reverse ruled line has a function of bending (reverse folding) the cardboard sheet so that the front liner 9B faces inward. The first to fifth folding curves L1 to L5 are not limited to general-purpose ruled lines and reverse ruled lines, and may be any line for bending a cardboard sheet, such as a lead ruled line having a cut formed on the general-purpose ruled line. Good.

Further, the back liner 9C between the first reinforcing portion 13 and the connecting portion 18 is provided with an adhesive region for applying an adhesive when assembling the tray 1 (not shown). As the adhesive to be applied to the adhesive region, for example, a hot melt adhesive, an aqueous emulsion adhesive, or the like may be used, or a double-sided tape may be used. The positions of the above-mentioned adhesive regions are examples, and these may be changed as appropriate.

[Tray assembly]
Next, an example of the assembly procedure of the tray 1 will be described with reference to FIGS. 1 and 4. FIG. 4 is a plan view illustrating an assembly procedure of the tray 1. The tray 1 may be assembled manually by an operator, or may be assembled fully or semi-automatically by a box making machine (not shown). Here, as an example, a case where the box making machine assembles the tray 1 fully automatically will be described.

A blank 1A (see FIG. 2) is set in the box making machine, and the box making machine assembles the tray 1 by bending or adhering the blank 1A at an appropriate position.

In the box making machine, an adhesive is applied to the adhesive region (back liner 9C) of the first reinforcing portion 13, and the second reinforcing portion 14 is folded inward by approximately 180 degrees along the fourth folding curve L4 (see FIG. 4). .. The second reinforcing portion 14 is folded back with respect to the first reinforcing portion 13 and adhered (fixed) to the inner surface (back liner 9C) of the first reinforcing portion 13. The first reinforcing portion 13 and the second reinforcing portion 14 form a double wall (see FIG. 4). The contact portion 15 overlaps (is not adhered) to the inner surface of the end wall 11.

Next, as shown in FIGS. 1 and 4, the box making machine bends the end wall 11 along the first folding curve L1 and bends the first reinforcing portion 13 inward along the third folding curve L3. The end wall 11 is erected with respect to the bottom wall 10 by being bent along the first folding curve L1. The first reinforcing portion 13 is bent with respect to the end wall 11 together with the second reinforcing portion 14 and is erected on the second folding curve L2. Since the abutting portion 15 is pressed against the inner surface of the end wall 11 as the first reinforcing portion 13 is bent, the contact portion 15 is reversely folded along the fifth folding curve L5.

Next, as shown in FIG. 1, the box making machine applies an adhesive to the adhesive region (back liner 9C) of the connecting portion 18 of the side wall 16 and bends the side wall 16 along the second folding curve L2. The side wall 16 is erected with respect to the bottom wall 10 by being bent along the second folding curve L2. Then, the connecting portion 18 of the side wall 16 is adhered (fixed) to the outer surface (front liner 9B) of the first reinforcing portion 13. The side wall 16 (connecting portion 18) in the erected state is fixed to the outer surface of the first reinforcing portion 13 and is connected to the end wall 11 via the reinforcing wall 12. By connecting the side wall 16 to the end wall 11, the contact portion 15 is bent against the second reinforcing portion 14 and abuts on the inner surface of the end wall 11 (pressed against the inner surface of the end wall 11). State) is held. Further, the pair of dismantling cutting lines 21 are generally located inside the first reinforcing portions 13 (or the second reinforcing portions 14) on both the left and right sides.

As described above, the tray 1 having the front surface, the rear surface, and the upper surface open is completed (see FIG. 1).

[Disassembly of tray]
Next, an example of the procedure for disassembling the tray 1 will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view illustrating a procedure for disassembling the tray 1. FIG. 6 is a perspective view showing a state in which the tray 1 is disassembled.

As shown in FIG. 5, the operator grips the upper end portions of the pair of end walls 11 and pulls the pair of end walls 11 to both outer sides in the left-right direction (see the thick arrows in FIG. 5). The pair of end walls 11 cut each side wall 16 along the pair of dismantling cutting lines 21 while being rotated (tilted) toward both outer sides about the first folding curve L1. The pair of connecting portions 18 are separated from the wall main body portion 17 by a dismantling cutting line 21. That is, the side wall 16 is divided into three parts. By tilting the pair of end walls 11 to both outer sides, each connection portion 18 (each divided side wall 16) is tilted together with the end wall 11 while being separated from the bottom wall 10 along the second folding curve L2. Will be done. That is, the connecting portion 18 collapses integrally with the end wall 11 while being fixed to the first reinforcing portion 13.

When the connecting portion 18 is tilted to separate from the bottom wall 10, the connecting portion 18 may tilt while peeling off the back liner 9C of the bottom wall 10 (see FIG. 5). The peeling of the back liner 9C often proceeds along the circumference of the virtual circular region 23 from the end of the crevice (intersection point P2) when the back liner 9C is cut along the dismantling cutting line 21 (see FIG. 3). When the back liner 9C of the bottom wall 10 is peeled off, the back liner 9C may be peeled off from the middle shin 9A and the middle shin 9A may be exposed (see FIGS. 5 and 6), and only the surface layer of the back liner 9C is exposed. It may peel off and the thin paper on the back side may remain on the middle shin 9A (not shown). Further, when the connecting portion 18 is tilted to separate from the bottom wall 10, the connecting portion 18 does not break along the second folding curve L2, and in the vicinity of the connecting portion 18, the middle shin 9A and the back liner 9C, or The middle shin 9A and the liners 9B and 9C on both the front and back sides may be torn (not shown). Even in this case, in the vicinity of the auxiliary cut line 22, only the back liner 9C is often peeled off.

In the tray 1 according to the present embodiment, as shown in FIG. 5, an auxiliary cut line 22 is formed in the virtual circular region 23 of the bottom wall 10 so as to intersect the peeling progress direction of the back liner 9C (as appropriate). See also Figure 3). Therefore, even if the back liner 9C of the bottom wall 10 is peeled off due to the tilting of the connecting portion 18, the peeled back liner 9C is cut by the auxiliary cut line 22 and separated from the bottom wall 10. In this way, each auxiliary cut line 22 interrupts the peeling of the back liner 9C of the bottom wall 10 that progresses with the tilting of the connecting portion 18 (divided side wall 16). The connecting portion 18 is appropriately separated from the bottom wall 10 without being connected to the bottom wall 10 by the peeled back liner 9C.

The connecting portion 18 is separated from the bottom wall 10, and the contact portion 15 is not fixed to the end wall 11. Therefore, as shown in FIG. 6, when the operator tilts the pair of end walls 11 until they are parallel to the bottom wall 10, the first and second reinforcing portions 13 and 14 are formed around the third folding curve L3. It naturally collapses outward due to the restoring force. Then, the end wall 11 and the reinforcing wall 12 are substantially parallel to the bottom wall 10, and the tray 1 is disassembled substantially flat. The wall main body 17 rotates (tilts) toward both outer sides about the second folding curve L2, and is substantially parallel to the bottom wall 10.

In the tray 1 (packaging box) according to the present embodiment described above, the four auxiliary cut lines 22 formed in the four corner regions of the bottom wall 10 are the bottom wall as the connecting portion 18 (divided side wall 16) is tilted. The back liner 9C peeled off from 10 was cut. According to this configuration, the progress of peeling of the back liner 9C of the bottom wall 10 can be interrupted. As a result, it is difficult for the connecting portion 18 to be connected to the end wall 11 by the peeled back liner 9C. Therefore, the connecting portion 18 can be placed in a posture substantially parallel to the end wall 11 simply by tilting the end wall 11. it can. That is, the tray 1 can be easily disassembled.

Further, if the auxiliary cut line 22 is inserted on the first folding curve L1 or the second folding curve L2, the strength of the tray 1 may decrease and the tray 1 may be easily deformed. In this respect, in the tray 1 according to the present embodiment, since the auxiliary cut line 22 is inclined with respect to the first folding curve L1 (or the second folding curve L2), it is possible to suppress a decrease in the strength of the tray 1. ..

Further, according to the tray 1 according to the present embodiment, since the connecting portion 18 is longer in the vertical direction than the wall main body portion 17, the connecting portion 18 can be securely fixed to the end wall 11 (first reinforcing portion 13). .. Further, at the time of dismantling, the force for tearing the connecting portion 18 from the wall main body portion 17 is likely to be concentrated on the bent portion 20A. Therefore, since the dismantling cutting line 21 extends downward from the bent portion 20A, efficiency is achieved with a small force. The connection portion 18 can be well separated from the wall body portion 17.

Further, according to the tray 1 according to the present embodiment, since the four corners of the tray 1 are reinforced by the first reinforcing portion 13 and the second reinforcing portion 14 forming a double wall, the tray 1 is compressed. The strength can be improved.

In the above-mentioned dismantling procedure of the tray 1, each side wall 16 is cut (divided) by a pair of dismantling cutting lines 21 by pulling down the pair of end walls 11 to both outer sides. Not limited to. For example, as another procedure for dismantling the tray 1, an operator grips the upper part of the wall body 17 of the side wall 16, tilts the wall body 17 outward (or inside), and dismantles and cuts the wall body 17 in pairs. It may be cut along the line 21. After cutting the wall main body 17 along the dismantling cutting line 21, the operator tilts the pair of end walls 11 to both outer sides, so that each connecting portion 18 is separated from the bottom wall 10 and tilted together with the end wall 11. You may let me.

In the tray 1 according to the present embodiment, the auxiliary cut line 22 is formed at an angle of 45 degrees with respect to the first folding curve L1 (or the second folding curve L2) (see FIG. 3). Is not limited to this. The auxiliary cut line 22 may be formed at an angle larger than 0 degrees with respect to the first folding curve L1 and the like. Further, although the auxiliary cut line 22 is formed in a straight line, for example, it may have a curved shape or a bent shape (polyline shape) (not shown). In the case of the curved auxiliary cut line 22, the tangent line at an arbitrary point may be formed so as to have an inclination with respect to the first folding curve L1 or the like (not shown). Further, in the case of the bent auxiliary cut line 22, at least a part thereof may be formed so as to have an inclination with respect to the first folding curve L1 or the like (not shown).

Further, in the tray 1 according to the present embodiment, the auxiliary cut line 22 is a half cut line, but the present invention is not limited to this. For example, the auxiliary cut line 22 may be a full cut line cut so as to penetrate the corrugated cardboard sheet, or may be a perforation in which a plurality of cuts are arranged (not shown). That is, the auxiliary cut line 22 may be configured to be able to cut the back liner 9C.

Further, in the tray 1 according to the present embodiment, the auxiliary cut line 22 extends slightly outward from the virtual circular region 23 (see FIG. 3), but the present invention is not limited to this. The auxiliary cut line 22 may be formed at least within the range of the virtual circle region 23. For example, the auxiliary cut line 22 may be formed only within the range of the virtual circle area 23, or may extend outward from the virtual circle area 23 (for example, about twice the virtual circle area 23) (FIG. FIG. Not shown). When forming only within the range of the virtual circular region 23, it is preferable that the tip of the auxiliary cut line 22 extending from the corner P1 is in contact with the circumference of the virtual circular region 23 or is located in the vicinity of the circumference. Further, the auxiliary cut line 22 extends from the corner portion P1 of the bottom wall 10 toward the central region of the bottom wall 10, but the present invention is not limited to this. The auxiliary cut line 22 may extend from a position slightly distant from the corner P1 toward the central region of the bottom wall 10 (not shown).

Further, in the tray 1 according to the present embodiment, a pair of dismantling cutting lines 21 are formed on each side wall 16, but the present invention is not limited to this. For example, only one dismantling cutting line 21 may be formed on each side wall 16 (not shown). That is, at least one dismantling cutting line 21 may be formed on each side wall 16.

Further, in the tray 1 according to the present embodiment, the side wall 16 is formed in a substantially U shape, but the present invention is not limited to this. For example, the side wall 16 may be formed in a rectangular shape, a semicircular shape, or the like without distinguishing between the wall main body portion 17 and the connecting portion 18 (not shown). Further, although the side wall 16 was formed lower than the end wall 11, it may be formed at the same height as the end wall 11 (not shown). The wall main body portion 17 and the connecting portion 18 may be formed at a height equal to or lower than the height of the end wall 11.

Further, in the tray 1 according to the present embodiment, the reinforcing wall 12 has the first reinforcing portion 13, the second reinforcing portion 14, and the contact portion 15, but the present invention is not limited to this. For example, the contact portion 15 may be omitted, and the reinforcing wall 12 may be composed of the first and second reinforcing portions 13, 14 (not shown). Further, for example, the contact portion 15 and the second reinforcing portion 14 may be omitted, and the reinforcing wall 12 may be composed of only the first reinforcing portion 13 (not shown).

Further, in the tray 1 according to the present embodiment, the bottom wall 10 is connected to the end wall 11 via the reinforcing wall 12, but the present invention is not limited to this. For example, the reinforcing wall 12 may be omitted, both sides of the side wall 16 may be extended, and the extended portion may be directly bonded (fixed) to the outer surface or the inner surface of the end wall 11 (not shown). Further, the side wall 16 (connecting portion 18) was adhered to the end wall 11 (reinforcing wall 12) via an adhesive or the like, but the present invention is not limited to this, and the end wall 11 (reinforcing wall 12) is attached with an adhesive tape or the like. It may be fixed (not shown).

Further, the tray 1 according to the present embodiment has the back liner 9C as the inner surface, but the present invention is not limited to this, and the front liner 9B may be the inner surface (not shown). In this case, the auxiliary cut line 22 is preferably formed on the front liner 9B side.

Further, the tray 1 according to the present embodiment has three consecutive surfaces (front surface, rear surface, and upper surface) open, but the present invention is not limited to this. A lid may be provided so as to cover the three open surfaces of the tray 1 (not shown). Further, the side wall 16 may be formed at the same height as the end wall 11 and may be a tray that opens only the upper surface (not shown). Further, the side wall 16 may be formed at the same height as the end wall 11, and flaps for closing the upper surface opening may be continuously provided at the upper ends of the side wall 16 and the end wall 11 (not shown). In this case, it is preferable that the flap is provided so as to be separable from the side wall 16.

Further, the tray 1 according to the present embodiment is formed of a double-sided cardboard sheet, but the present invention is not limited to this. For example, the cardboard sheet may be a single-sided cardboard sheet in which a liner is attached to one side of the inner shin 9A, or a double-sided cardboard sheet in which a single-sided cardboard sheet and a double-sided cardboard sheet are laminated. For single-sided cardboard sheets, it is preferable to have the liner facing inward. Further, the tray 1 is substantially formed in a rectangular shape, but the present invention is not limited to this, and a corner cut surface may be provided at the angular ridgeline portion of the rectangular body (not shown). That is, the tray 1 may be formed into a polygon such as a hexagon or an octagon when viewed from a plane. Further, the dimensions (width, depth, height) and shape of each part of the tray 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 request for registration of a practical new proposal includes all embodiments that can be included within the scope of the technical idea. ..

1 tray (packaging box)
9A Medium shin 9B Front liner 9C Back liner 10 Bottom wall 11 End wall 12 Reinforcement wall 13 1st reinforcement part 14 2nd reinforcement part 15 Contact part 16 Side wall 17 Wall body part 18 Connection part 20 Opening part 20A Bending part 21 Dismantling cutting Line 22 Auxiliary cut line 23 Virtual circle area L1 First fold curve L2 Second fold curve P1 Corner P2 Intersection R1 Radius

Claims (4)

It is a cardboard packaging box (1) in which liners (9B, 9C) are bonded to the middle shin (9A).
Bottom wall (10) and
A pair of end walls that are connected to both ends of the bottom wall in the first direction via a first folding curve (L1) and are erected with respect to the bottom wall by being bent along the first folding curve. (11) and
It is erected against the bottom wall by being connected to both ends of the bottom wall in the second direction orthogonal to the first direction via a second folding curve (L2) and being bent along the second folding curve. And provided with a pair of side walls (16) connected to the pair of end walls in an upright position.
At least one dismantling cutting line (21) for dividing the side wall is formed on each of the side walls.
Auxiliary cut lines (22) extend diagonally from the corners (P1) of the bottom wall toward the central region of the bottom wall in each of the four corner regions of the bottom wall.
Each of the auxiliary cut lines is centered on at least the corner portion, and the distance from the corner portion to the intersection (P2) of the rift and the second folding curve when cut by the dismantling cutting line is the radius (R1). ) Is formed within the range of the virtual circle area (23).
By tilting the pair of the end walls to both outer sides, each of the side walls divided by the dismantling cutting line is tilted together with the end walls while being separated from the bottom wall.
Each of the auxiliary cut lines is a packaging box characterized in that the peeling of the liner of the bottom wall progresses with the tilting of the divided side wall. Each said side wall
The wall body (17) that constitutes the intermediate region in the first direction,
It has a pair of connecting portions (18) which are connected to both sides of the wall main body portion in the first direction and are connected to the end wall.
The pair of dismantling cutting lines are formed between the wall body and the pair of connecting portions.
By tilting the pair of the end walls to both outer sides, each of the connecting portions divided from the wall main body portion by the dismantling cutting line is tilted together with the end walls while being separated from the bottom wall.
The packaging box according to claim 1, wherein each of the auxiliary cut lines interrupts the peeling of the liner on the bottom wall, which proceeds with the tilting of the connection portion. The wall body is formed lower than the height of the connection.
The connection portion is formed at a height equal to or lower than the height of the end wall.
An opening (20) having a pair of bent portions (20A) is formed in a range surrounded by the wall main body portion and the pair of the connecting portions.
The packaging box according to claim 2, wherein in each of the side walls, a pair of dismantling cutting lines extend downward from the pair of bent portions. Further provided with two pairs of reinforcing walls (12) connected to both ends of the pair of end walls in the second direction.
Each said reinforcing wall
A first reinforcing portion (13) that is bent with respect to the end wall and erected on the second folding curve, and
A second reinforcing portion (14) that is folded back with respect to the first reinforcing portion and fixed to the inner surface of the first reinforcing portion.
It has a contact portion (15) that is bent with respect to the second reinforcing portion and abuts on the inner surface of the end wall.
The aspect according to any one of claims 1 to 3, wherein each of the side walls is fixed to the outer surface of the first reinforcing portion and is connected to the end wall via the reinforcing wall. Packaging box.

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