JP7218247B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes.

Patent Literature 1 discloses a corrugated cardboard box in which a front plate portion, a rear plate portion and a pair of side plate portions are erected on four sides of a bottom plate portion, and the upper portion is open. Four pillars are erected at the corners of the bottom plate, and the front plate and the rear plate are adhered to the pillars. When discarding the corrugated cardboard box, the front plate portion and the rear plate portion are torn outward along the boundary line with the supporting column, and unfolded on the same plane as the bottom plate portion.

JP-A-10-101062

However, in the corrugated cardboard box described above, a cutting line or the like is not formed on the front plate portion and the back plate portion, and the front plate portion and the back plate portion are forcibly torn apart in order to dismantle the corrugated cardboard box. Therefore, the corrugated cardboard box described above could not be easily dismantled.

If a cutting line for dismantling is formed on the front plate portion and the rear plate portion, the above problems can be solved. However, for example, if an article moves (vibrates) inside a cardboard box during transportation, and a pressing force (internal pressure) is applied to the front panel, etc., or if the front panel, etc. is dragged by a hand, it will be dismantled. Another problem arises that the front plate portion or the like is cut along the cutting line even though it is not intended. In other words, when a cutting line for dismantling is provided, there is a risk that the cardboard box will be dismantled during normal use.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a packaging box whose dismantling can be restricted during normal use and which can be easily dismantled when discarded.

In order to achieve the above object, the packaging box of the present invention comprises a bottom wall, a side wall erected at the end of the bottom wall in a first direction, and a second direction crossing the first direction of the bottom wall. and an end wall erected at an end of the side wall, a folded piece that can be folded inward is formed in an intermediate region of the side wall in the second direction, and the folded piece is folded back inward of the side wall. The side wall is provided with a recessed portion extending downward from the upper end thereof, and the side wall is formed with a cutting line that separates the intermediate region of the side wall from the edge of the recessed portion to the lower end of the side wall. , the end portion of the folded back piece in the second direction overlaps the inner surface of the side wall so as to straddle the cutting line, thereby restricting the side wall from falling outward while being cut along the cutting line. , allowing the side wall to fall inward while being cut along the cutting line.

In this case, it is preferable that a second cutting line is formed at the boundary between the bottom wall and the side wall to separate the side regions of the side wall excluding the intermediate region from the bottom wall.

In this case, the lower edge and the side edges of the recess are continuous via oblique edges that form two or more inflection points, and the cutting line is the lowest inflection point. It preferably extends downward from the point.

In this case, the bottom wall, the side walls and the end walls are made of corrugated cardboard sheets, the cutting line is a zipper with a plurality of cuts arranged in parallel, the cuts are vertically extended, and the corrugated cardboard It is preferable to include a half cutting line portion cut from the back surface of the sheet to the middle in the thickness direction, and a full cutting line portion extending obliquely upward from the upper end of the half cutting line portion and penetrating the corrugated cardboard sheet in the thickness direction. .

In this case, it is preferable to further include a fixed wall connected to the end wall and fixed to the lateral region of the side wall excluding the intermediate region.

In this case, it is preferable that the fixed wall constitutes a part of a cylindrical column.

According to the present invention, there is provided a packaging box whose dismantling can be restricted during normal use and which can be easily dismantled when discarded.

1 is a perspective view showing a tray according to one embodiment of the present invention; FIG. FIG. 3 is a plan view showing a tray blank according to one embodiment of the present invention; FIG. 4 is a plan view showing an enlarged part of the blank of the tray according to one embodiment of the present invention; FIG. 3 is a perspective view showing the tray according to one embodiment of the present invention in which a column portion is formed; FIG. 4 is a perspective view of the tray according to the embodiment of the present invention, explaining the positional relationship between the folding piece and the cutting line. FIG. 4 is a perspective view showing a state in which the side wall of the tray according to one embodiment of the present invention is cut along a cutting line; 1 is a perspective view showing a disassembled state of a tray according to one embodiment of the present invention; FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates " "Upper" and "D" indicate "Lower". The front-rear direction (first direction) is perpendicular to (intersects) the left-right direction (second direction), and the up-down direction is perpendicular to (intersects) the front-rear direction and the left-right direction. Terms indicating direction and position are used in this specification, but these terms are used for convenience of description and are not intended to limit the technical scope of the present invention.

[Overview of Tray]
A tray 1 as an example of a packaging box will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is a perspective view showing the tray 1. FIG. FIG. 2 is a plan view showing the blank 5 of the tray 1. FIG. FIG. 3 is a plan view showing an enlarged part of the blank 5. FIG.

As shown in FIG. 1, the tray 1 includes a pair of side walls 11 erected at both ends in the front-rear direction of a bottom wall 10, a pair of end walls 12 erected at both ends in the left-right direction of the bottom wall 10, It has The tray 1 is formed in a substantially rectangular parallelepiped shape with an open upper surface. Articles (not shown) are placed on the bottom wall 10, and the tray 1 is formed such that a plurality of trays containing articles can be stacked vertically.

The tray 1 is formed by assembling blanks 5 shown in FIG. The blank 5 is formed by punching out a cardboard sheet made of paper with a die or the like. The corrugated board sheet is, for example, a double-faced corrugated board sheet in which a front liner 9B and a back liner 9C (see FIG. 1) are bonded to a corrugated medium 9A. 2 and 3 show the front liner 9B side. In this specification, the direction parallel to the core 9A of the corrugated cardboard sheet is called the "corrugation direction", and the direction orthogonal to the corrugation direction is called the "flow direction". The "X" shown in the drawings indicates the "row direction", and the "Y" indicates the "flow direction". Also, in this specification, terms indicating directions refer to directions in the assembled state of the tray 1 (assembled state).

[blank]
As shown in FIG. 2, the blank 5 includes a bottom wall 10, a pair of side walls 11, a pair of end walls 12, four fixed walls 13, and four column walls 14. As shown in FIG.

<Bottom wall>
The bottom wall 10 is formed in a substantially rectangular shape with the length in the step direction (second direction) longer than the width in the flow direction (first direction). Four connecting holes 20 are drilled in the four corners of the bottom wall 10 . The connecting hole 20 is formed in a substantially elliptical shape that is inclined at about 45 degrees with respect to two orthogonal sides of the four corners of the bottom wall 10 . Although details will be described later, when a plurality of trays 1 are stacked, the connecting projections 27 of the lower tray 1 are fitted into the connecting holes 20 of the upper tray 1 .

<Sidewall>
The pair of side walls 11 are connected to both end portions of the bottom wall 10 in the flow direction via the first folding line L1. The side wall 11 is formed in a substantially rectangular shape, and its dimension in the flow direction (extension dimension) is set to about half the dimension in the flow direction of the bottom wall 10 . Since the pair of side walls 11 are axisymmetrical with respect to the bottom wall 10, one side wall 11 will be mainly described below.

A folded piece 22 that can be folded inward is formed in the middle region 11C of the side wall 11 in the left-right direction. As shown in FIG. 1 , by folding back the folding piece 22 , a recess 21 is formed in the side wall 11 from the tip (upper end) toward the base end (downward). The concave portion 21 is a hollow formed in a substantially hexagonal shape by chamfering both corners on the base end side. Although the details will be described later, the regions of the side walls 11 on both sides outside the width of the recess 21 in the step direction (regions of the side walls 11 excluding the intermediate region 11C) are fixing regions for fixing (bonding) the fixed wall 13. 11A (“lateral region” in the claims).

As shown in FIGS. 1 and 2, the folded piece 22 is connected to an edge portion 21A on the base end side (lower side) of the recess 21 via two second folding lines L2. The two second folding lines L2 (edge portion 21A) extend substantially parallel to the first folding line L1. Note that the lower edge portion 21A of the concave portion 21 is mainly configured by the second folding line L2 on the base end side. As shown in FIG. 2 , the folded piece 22 is formed in a substantially rectangular shape and arranged inside the recess 21 . The ends of the folded pieces 22 in the flow direction substantially coincide with the ends of the fixing regions 11A in the flow direction. A gap is formed between both ends of the folded piece 22 in the step direction and both edges of the concave portion 21 in the step direction.

As shown in FIG. 1, when the tray 1 is assembled (assembled state), the recess 21 is recessed downward from the upper end of the intermediate region 11C. As shown in FIGS. 1 to 3, edge portions 21B on both sides (sides) in the step direction (horizontal direction) of the recess 21 extend in a direction (vertical direction) substantially orthogonal to the lower edge portion 21A. Edge 21A and edge 21B of recess 21 are continuous via oblique edge 21C forming two inflection points P1 and P2. The oblique edge portion 21C is oblique (diagonally downward) from the outer side in the step direction (horizontal direction) toward the center side toward the base end between the uppermost inflection point P1 and the lowermost inflection point P2. has been extended to

(Cutting line)
As shown in FIGS. 1 to 3, the side wall 11 has a pair of cutting lines 23 formed between the lower edge 21A of the recess 21 and the lower end of the side wall 11. As shown in FIGS. Specifically, the pair of cutting lines 23 extend linearly downward from the lowermost inflection point P2. The cutting line 23 extends in a direction substantially perpendicular to the first folding line L1. The cutting line 23 is a zipper in which a plurality of cuts 23A are arranged at approximately equal intervals, and has a function of separating the intermediate region 11C of the side wall 11 (from the pair of fixing regions 11A).

As shown in FIG. 3, the cut 23A that constitutes the cutting line 23 includes a half cutting line portion 23B that extends in the flow direction (vertical direction), and a half cutting line portion 23B that extends obliquely upward from the tip (upper end) of the half cutting line portion 23B. It is formed in a substantially L shape including the entire cut line portion 23C. The half cutting line 23B is cut from the back surface (back liner 9C) of the corrugated cardboard sheet to the middle in the thickness direction (indicated by broken lines in FIGS. 2 and 3). All cut line portions 23C penetrate the corrugated cardboard sheet in the thickness direction. That is, the half cut line portion 23B does not appear on the surface of the side wall 11 (front liner 9B), but the full cut line portion 23C appears on the surface of the side wall 11 (see FIG. 1). The cut 23A contacting the lowermost inflection point P2 is formed in a straight line extending vertically and penetrates the corrugated cardboard sheet in the thickness direction.

As shown in FIGS. 2 and 3, both end portions of the folded piece 22 in the step direction overlap the oblique edge portion 21C between the two inflection points P1 and P2. That is, both sides of the folded piece 22 in the step direction extend outward from the pair of cutting lines 23 in the step direction. It is preferable that the protrusion amount S of both sides of the folded piece 22 in the step direction (the dimension from the half cutting line 23B to the end of the folded piece 22 in the step direction (see FIG. 3)) is set to 1 mm or more. More specifically, for example, if the dimension of the side wall 11 in the longitudinal direction (step direction) is about 600 mm, the protrusion amount S is preferably set to about 1 to 15 mm.

(Second cutting line)
As shown in FIG. 2, a second cutting line 30 is formed at the boundary (on the first folding line L1) between the bottom wall 10 and each fixed region 11A of the side wall 11. As shown in FIG. The second cutting line 30 extends outward in the step direction from the base end (lower end) of the cutting line 23 . The second cutting line 30 is a zipper in which a plurality of substantially L-shaped cuts are arranged at substantially equal intervals, and has the function of separating the fixing region 11A from the bottom wall 10 .

<End wall>
As shown in FIG. 2, the pair of end walls 12 are connected to both end portions of the bottom wall 10 in the step direction via a third folding line L3. The end wall 12 is formed in a substantially rectangular shape, and its stepwise dimension (extending dimension) is substantially the same as the extending dimension of the side wall 11 . A hand hole 24 is drilled in the approximate center of the end wall 12 so that an operator can put his/her hand thereon when transporting the tray 1. - 特許庁A pair of handle cushioning pieces 25 that can be bent inward are connected to the step-direction outer edge (upper edge) of the handle hole 24 via a handle folding line 25A.

<Fixed wall>
The four fixed walls 13 are connected to both ends of the pair of end walls 12 in the flow direction via the fourth folding line L4. The fixed wall 13 is formed in a substantially rectangular shape, and its dimension in the direction of flow (extending dimension) is set to about 1/4 of the extending dimension of the side wall 11 . A folding line 26 for dismantling is formed parallel to the fourth folding line L4 on the leading end side of the fixed wall 13 in the flow direction. The folding line 26 for dismantling is a perforating blade line in which linear cuts are arranged at regular intervals.

<Pillar wall>
The four column walls 14 are connected to both end portions of the four fixed walls 13 in the flow direction. Each post wall 14 includes a post body wall 14A and a post adhesive piece 14B. Since the four column walls 14 have the same configuration, one column wall 14 will be mainly described below.

The column main body wall 14A is connected to the flow direction end of the fixed wall 13 via the fifth folding line L5. The column main body wall 14A is formed in a substantially rectangular shape, and its dimension in the direction of flow (extending dimension) is set slightly longer than the extending dimension of the fixed wall 13 . A connecting convex portion 27 is protruded from the tip of the column main body wall 14A in the step direction. The amount of protrusion of the connecting protrusion 27 is set to approximately the thickness of the corrugated cardboard sheet. The column adhesive piece 14B is connected to the flow-direction end of the column body wall 14A via a reverse folding line L6. The column adhesive piece 14B is formed in substantially the same shape as the column body wall 14A.

The first to fifth folding lines L1 to L5 and the hand folding line 25A are general ruled lines formed by linearly recessing the cardboard sheet from the back liner 9C. The general-purpose ruled lines have the function of folding (correctly folding) the corrugated cardboard sheet so that the back liner 9C faces inward. A reverse fold line L6 is a reverse ruled line formed by linearly recessing the corrugated cardboard sheet from the front liner 9B. The reverse crease has the function of folding (reverse folding) the corrugated cardboard sheet so that the front liner 9B faces inward. The folding lines L1 to L6 are not limited to general-purpose ruled lines and reverse ruled lines, and may be any lines for folding corrugated cardboard sheets, such as lead ruled lines in which cuts are formed on general-purpose ruled lines.

[Tray assembly]
Next, assembling work of the tray 1 will be described with reference to FIGS. 1, 4 and 5. FIG. FIG. 4 is a perspective view showing the tray 1 on which the pillars 28 are formed. FIG. 5 is a perspective view for explaining the positional relationship between the folding piece 22 and the cutting line 23. FIG. 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 5 is set in the box making machine, and the box making machine assembles the tray 1 by folding or adhering the blank 5.例文帳に追加

Specifically, the box making machine normal-folds each fixed wall 13 along the fourth folding line L4 at a substantially right angle, normal-folds each column main body wall 14A along the fifth folding line L5, and folds each column. The adhesive piece 14B is reversely folded along the reverse folding line L6 (see FIG. 4). Further, the box making machine adheres (fixes) each column adhesive piece 14B to the inner surface of the end wall 12 via an adhesive. Subsequently, the box making machine bends the pair of end walls 12 upward along the third folding line L3 substantially at a right angle, and erects the pair of end walls 12 on both left and right ends of the bottom wall 10 (see FIG. 4). ). In this state, as shown in FIG. 4, each fixed wall 13 is erected along the first folding line L1. Each column body wall 14A is inclined at approximately 45 degrees with respect to the end wall 12 and the fixed wall 13, and is arranged on the connecting hole 20 opened in the bottom wall 10. As shown in FIG. The end wall 12, the fixed wall 13, and the column body wall 14A constitute a column portion 28 formed in a tubular shape (substantially triangular prism shape) having a substantially triangular cross section. Four pillars 28 are erected at the four corners of the bottom wall 10 .

Next, the box making machine folds the pair of folded pieces 22 along the two second folding lines L2, and attaches the pair of folded pieces 22 to the inner surfaces (back liners 9C) of the pair of side walls 11 via an adhesive. Glue (fix). In this state, recesses 21 are formed in each side wall 11 (see FIG. 4). The left and right ends of the folded back piece 22 overlap the inner surface of the side wall 11 across the cutting line 23 (see also FIG. 5). In other words, the folded piece 22 extends beyond (crosses) the cutting line 23 to the fixing region 11A. That is, the left and right sides of the folded piece 22 cover the upper back side of the cutting line 23 . In addition, the strength of the side wall 11 can be improved by folding back the folded piece 22 and adhering it to the side wall 11 .

In addition, the box making machine bends the pair of side walls 11 upward along the first folding line L1 substantially at a right angle, erects the pair of side walls 11 on both front and rear ends of the bottom wall 10, and attaches them to each other via an adhesive. The side walls 11 (fixed areas 11A) are adhered (fixed) to the outer surface (front liner 9B) of each fixed wall 13 (see FIG. 1).

By the above, the tray 1 is completed (see FIG. 1). In this embodiment, a hot-melt adhesive is used as the adhesive, but other adhesives or double-sided tape may be used.

A worker places articles on the bottom wall 10 of the completed tray 1 . Also, when the operator puts his hand on the upper edge of each handle hole 24 in order to carry the tray 1, each handle cushioning piece 25 is bent inward along the handle folding line 25A (not shown). A worker can carry the tray 1 by putting his/her hand on the lower surface of each bent handle cushioning piece 25.例文帳に追加By bending each handle cushioning piece 25 inward in this manner, the upper edge of the handle hole 24 is suppressed from biting into the operator's hand, and the burden on the operator's hand can be reduced. As a result, the tray 1 can be easily carried by the operator.

[Lamination action of trays]
Moreover, although illustration is omitted, a plurality of trays 1 can be stacked in the vertical direction. For example, the operator places the upper tray 1 above the lower tray 1 in the same direction, and places the upper tray 1 on the four pillars 28 of the lower tray 1 . Each connecting protrusion 27 of the lower tray 1 is inserted into each connecting hole 20 of the upper tray 1 . As described above, the two trays 1 are stacked in a state in which lateral slippage is regulated.

By the way, the tray 1 containing articles is transported by a vehicle or by an operator. At that time, since the articles vibrate or move inside the tray 1, the side wall 11 may be pressed from the inside to the outside. In addition, the operator may put his hand on the concave portion 21 of the side wall 11 of the tray 1 placed on the floor or workbench and drag it. As described above, when the side wall 11 is tilted outward during normal use of the tray 1, the side wall 11 may be cut along the cutting line 23 unintentionally.

In this respect, as shown in FIG. 5, in the tray 1 according to the present embodiment, the folding piece 22 extends beyond the cutting line 23 to the fixing region 11A, so the side wall 11 (intermediate region 11C) should be tilted outward. Then, the end of the folded piece 22 is pressed against the inner surface of the fixed area 11A. That is, since the end portion of the folded piece 22 interferes with the inner surface of the fixed region 11A, the side wall 11 (intermediate region 11C) is prevented from falling outward while being cut along the cutting line 23 . In addition, when articles are stored in the tray 1 (during normal use), the articles come into contact with the inner surfaces of the side walls 11, so that the side walls 11 are less likely to fall inward. As described above, during normal use, the side walls 11 of the tray 1 are not likely to fall either outwardly or inwardly, and the structure is such that the side walls 11 are not easily cut along the cutting line 23 .

[Tray Dismantling]
Next, disassembly of the tray 1 will be described with reference to FIGS. 6 and 7. FIG. FIG. 6 is a perspective view showing the side wall 11 cut along the cutting line 23. As shown in FIG. FIG. 7 is a perspective view showing the disassembled state of the tray 1. As shown in FIG.

The tray 1 from which all articles have been taken out is dismantled and discarded. The tray 1 is dismantled by cutting the side wall 11 using the cutting line 23 and the second cutting line 30 .

As shown in FIG. 6, the operator grabs the upper portion of the intermediate region 11C of one side wall 11 (the lower edge 21A of the recess 21) and pushes the side wall 11 inward. Then, the side wall 11 is cut along the pair of cutting lines 23, and the intermediate region 11C is separated from the pair of fixing regions 11A. Similarly to the above, the worker also cuts the other side wall 11 along the cutting line 23 . In this state, each fixed area 11A of the side wall 11 is connected to the bottom wall 10 and the fixed wall 13 (column wall 14), so each end wall 12 is held in an upright posture. Here, the end portion of the folded piece 22 overlaps the side wall 11 so as to cover the cutting line 23 (see FIG. 5). It falls inward and its end goes away from the fixed area 11A. Therefore, the ends of the folded pieces 22 do not interfere with the fixed area 11A. The other side wall 11 is also cut along the pair of cutting lines 23 in the same manner as described above.

Next, as shown in FIG. 7, the operator grabs one end wall 12 (or column 28) and pulls it outward. At this time, each fixed region 11A of each side wall 11 is cut along the second cutting line 30 and tilts outward together with the end wall 12 and the column portion 28 . Also, the other end wall 12 is pulled down in the same manner as described above, and each fixing region 11A is also cut along the second cutting line 30 . The fixed area 11A remains adhered to the fixed wall 13 (see the right side of FIG. 7).

Next, the worker flattens the four cylindrical column portions 28 (see the left side of FIG. 7). Specifically, the worker folds the fixed wall 13 along the dismantling fold line 26 while flattening the portion of the fixed wall 13 broken along the fifth fold line L5 and the column body wall 14A. Since the folding line 26 for dismantling is formed at a position that bisects the circumference of the pillar 28, the pillar 28 is flatly folded (crushed) by bending the fixed wall 13 along the folding line 26 for dismantling. ) state. In addition, the columnar portion 28 on the right side of FIG. 7 is also crushed in the same manner as the columnar portion 28 on the left side.

As described above, the tray 1 is dismantled substantially flat.

In the tray 1 according to the present embodiment described above, both left and right sides (ends) of the folding piece 22 overlap the inner surface of the side wall 11 so as to cover the cutting line 23 (see FIG. 5). With this configuration, the left and right sides of the folded piece 22 restrict the side wall 11 from falling outward while being cut along the cutting line 23, and allow the side wall 11 to fall inward while being cut along the cutting line 23. We were able to. As a result, when articles are accommodated in the tray 1 (during normal use), the side walls 11 are less likely to fall outward or inward, and the side walls 11 are prevented from being unintentionally cut along the cutting line 23. be able to. On the other hand, when the tray 1 is empty, there is no object that prevents the side wall 11 from falling inward, so the side wall 11 can be cut inward while being cut along the cutting line 23 . As described above, dismantling of the tray 1 can be restricted during normal use, and the tray 1 can be easily dismantled during disposal.

Further, according to the tray 1 according to the present embodiment, by cutting the intermediate region 11C of the side wall 11 along the cutting line 23 and cutting the fixed region 11A of the side wall 11 along the second cutting line 30, The side walls 11 can be developed flush with the bottom wall 10 (see FIG. 7). As a result, the tray 1 can be dismantled into flat plates, and a plurality of trays 1 can be stacked and stored until collected.

Here, when the worker pushes the central portion of the side wall 11 in the longitudinal direction (left-right direction) when dismantling the tray 1, the pushing force tends to concentrate on the lowermost inflection point P2. According to the tray 1 according to the present embodiment, the cutting line 23 starts from the lowermost inflection point P2, so the side wall 11 can be easily cut by the force pushing the side wall 11 inward. Thereby, the tray 1 can be easily dismantled.

Further, in the tray 1 according to the present embodiment, the cut line 23A forming the cut line 23 is configured to include the half cut line portion 23B and the full cut line portion 23C. According to this configuration, the semi-cut line portion 23B does not appear on the surface of the side wall 11, so the surface of the side wall 11 can be made smooth (see FIG. 1). As a result, for example, characters and illustrations can be printed neatly on the side wall 11 . In addition, the cutting line 23 including the half cut line portion 23B is more difficult to cut than a normal zipper in which the cut lines 23A are all full cut lines. be able to.

Further, in the tray 1 according to the present embodiment, the side wall 11 and the end wall 12 stand up on the peripheral edge of the bottom wall 10, and the side wall 11 is fixed (adhered) to the fixed wall 13, thereby forming the tray 1. . According to this structure, compared with a structure in which the fixed wall 13 is wrapped around the side wall 11 made into a double wall, the connection structure between the side wall 11 and the end wall 12 can be simplified, and the tray 1 can be manufactured easily and inexpensively. can be manufactured to In addition, the tray 1 can be dismantled without peeling off the fixed area 11A of the side wall 11 from the fixed wall 13 . Thereby, the tray 1 can be easily dismantled in a short time.

Further, according to the tray 1 according to the present embodiment, the fixed wall 13 constitutes a part of the cylindrical column portion 28, so that when the side wall 11 is tilted, the fixed wall 13 is prevented from collapsing. can be done. As a result, the side wall 11 (intermediate region 11C) can be tilted inward while being cut along the cutting line 23, and the tray 1 can be dismantled appropriately.

In addition, although the cutting line 23 is formed linearly in the tray 1 according to the present embodiment, the present invention is not limited to this. The cutting line 23 may have any shape as long as it is formed from any of the edges 21A, 21B, 21C of the recess 21 to the lower end of the side wall 11. For example, the cutting line 23 may be curved or polygonal. Or it may be a shape that is a combination of these (not shown). Moreover, although the cutting line 23 extends downward from the lowermost inflection point P2, it is not limited to this, and may extend downward from the uppermost inflection point P1, for example (not shown). Also, the upper end of the cutting line 23 may be in contact with the lower edge 21A or the oblique edge 21C instead of the inflection points P1 and P2 (not shown).

Moreover, in the tray 1 according to the present embodiment, the cutting line 23 and the second cutting line 30 are so-called zippers, but the present invention is not limited to this. For example, the cutting line 23 and the second cutting line 30 are lines having the function of cutting the side wall 11, such as a perforating blade line in which a plurality of straight cuts are arranged, a half-cut line in which a corrugated cardboard sheet is cut in half in the thickness direction, or the like. It can be anything.

In addition, in the tray 1 according to the present embodiment, the oblique edge 21C is formed in a single straight line, and two inflection points P1 and P2 are formed at the corners of the recess 21. However, the present invention It is not limited to this. For example, the oblique edge portion 21C may be formed in a curved shape that protrudes downward or upward, may be formed in a polygonal line shape, or may be a line combining a curved line and a straight line ( not shown). When the oblique edge portion 21C is a polygonal line, three or more inflection points are formed.

In addition, in the tray 1 according to the present embodiment, the concave portion 21 is an approximately rectangular depression, but is not limited to this, and may be an approximately non-rectangular polygonal, semicircular, or other depression. There may be (not shown). Moreover, although one recess 21 (folding piece 22) is formed in one side wall 11, the present invention is not limited to this. For example, two or more recesses 21 (folding pieces 22) may be formed on one side wall 11 (not shown).

Moreover, in the tray 1 according to the present embodiment, the folding piece 22 is folded back and adhered to the side wall 11, but the present invention is not limited to this. For example, the height of the folded piece 22 may be set to about half the height of the side wall 11 so that the tip of the folded piece 22 contacts the bottom wall 10 (not shown). That is, the side walls 11 and the folded pieces 22 may form a double wall structure. In this case, a projection may be provided at the tip of the folded piece 22, and a hole (not shown) may be formed in the bottom wall 10 for engagement with the projection of the folded piece 22. FIG.

Moreover, although the triangular prism-shaped column portions 28 are provided at the four corners of the tray 1 according to the present embodiment, the present invention is not limited to this. Each column 28 may be formed in a tubular shape having a polygonal cross section other than a triangular cross section (not shown). Also, each column portion 28 (column wall 14) may be omitted (deleted) (not shown). In this case, the connecting hole 20 of the bottom wall 10 and the folding line 26 for dismantling of the fixed wall 13 may be omitted.

Further, although the tray 1 according to the present embodiment is formed of a double-faced cardboard sheet made of paper, the present invention is not limited to this. may be formed of

Moreover, although the tray 1 (or the bottom wall 10) according to the present embodiment is formed in a substantially rectangular shape when viewed from above, the present invention is not limited to this. Although illustration is omitted, for example, the bottom wall may be formed in a substantially octagonal shape by obliquely cutting off the four corners of a rectangle when viewed from above. In this case, the end wall includes an end wall body erected at both left and right ends of the bottom wall, and a chamfered wall continuous with the end wall body and erected at an oblique edge of the bottom wall. is preferred. The fixed wall 13 is connected to the chamfered wall and fixed to the side wall.

Further, in the present embodiment, the case where the present invention is applied to the tray 1 as an example of the packaging box has been described. The bottom wall 10 may be a so-called one-touch bottom (not shown). That is, the present invention can be applied to a packaging box of a format other than the tray 1 regardless of the format of the packaging box. In addition, when adopting the one-touch bottom, the four fixed walls 13 and the four column walls 14 are omitted (deleted), and the pair of side walls 11 and the pair of end walls 12 are alternately connected to each other. A connecting piece is connected to the side wall 11 (or the end wall 12) on the side, and the connecting piece is adhered to the inner surface of the end wall 12 (or the side wall 11) on the opposite side to form a rectangular tube shape. is preferred.

It should be noted that 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.

1 tray (packaging box)
10 bottom wall 11 side wall 11A fixed region (side region)
11C intermediate region 12 end wall 13 fixed wall 21 recess 21A lower edge 21B side edge 21C oblique edge 22 folded piece 23 cutting line 23A cut 23B half cutting line 23C full cutting line 28 pillar 30 second cutting line

Claims (6)

a bottom wall (10);
a side wall (11) erected at the end of the bottom wall in the first direction;
an end wall (12) erected at an end in a second direction that intersects the first direction of the bottom wall;
A folded piece (22) that can be folded inward is formed in the intermediate region (11C) of the side wall in the second direction,
A concave portion (21) is recessed downward from the upper end of the side wall by folding the folded piece inside the side wall,
The side wall is formed with a cutting line (23) separating the intermediate region of the side wall from the edge (21A) of the recess to the lower end of the side wall,
The end portion of the folded back piece in the second direction overlaps the inner surface of the side wall so as to straddle the cutting line, thereby restricting the side wall from falling outward while being cut along the cutting line, The packaging box is characterized in that the side walls are cut along the cutting line and allowed to fall inward. A second cutting line (30) is formed at a boundary between the bottom wall and the side wall to separate a side region (11A) of the side wall excluding the intermediate region from the bottom wall. The packaging box according to claim 1. The lower edge (21A) and the side edge (21B) of the recess are continuous via an oblique edge (21C) forming two or more inflection points (P1, P2),
The packaging box according to claim 1 or 2, wherein the cutting line extends downward from the inflection point (P2) at the bottom. the bottom wall, the side walls and the end walls are made of cardboard sheets;
The cutting line is a zipper with a plurality of cuts (23A) arranged side by side,
The cut is
a half cut line portion (23B) extending in the vertical direction and cut from the back surface of the corrugated cardboard sheet to the middle in the thickness direction;
The package according to any one of claims 1 to 3, further comprising a full cut line portion (23C) extending obliquely upward from the upper end of the half cut line portion and penetrating the corrugated cardboard sheet in the thickness direction. box. 5. A fixed wall (13) connected to said end wall and fixed to a lateral region (11A) of said side wall excluding said intermediate region. packaging box. 6. The packaging box according to claim 5, wherein said fixed wall constitutes a part of a column (28) formed cylindrically.

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