JP7428612B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes.

A corrugated board corner pad is disclosed that includes a bottom surface having two sides intersecting at right angles and two side surfaces extending perpendicularly from each side (Patent Document 1). The bottom surface is divided along a diagonal line that bisects the apex angle defined by the two sides, a notch is formed on one of the two divided bottom surfaces, and a protrusion that fits into the notch is formed on the other of the two divided bottom surfaces. It is formed. The protrusion has a required shape that is removably fitted into the notch in the vertical direction and cannot be removable in the horizontal direction.

Japanese Unexamined Patent Publication No. 8-198334

However, the notch and protrusion of the above-mentioned corrugated board corner pad are only as thick as one piece of cardboard, and there is a problem in that the protrusion easily comes off from the notch. For this reason, the lock on the bottom surface divided into two parts may be unintentionally released.

In order to solve the above problems, the present invention provides a packaging box that can maintain the engaged state of a first engaging part and a second engaging part.

The present invention provides a pair of first walls disposed on both sides in the construction direction with the object to be packaged in between, a second wall constructed between one end of the pair of first walls, and one of the first walls. a first flap extending from the other end toward the other first wall and forming a first engaging portion having a double wall structure by folding the tip side inward; a second flap extending from the other end of the wall toward one of the first walls and forming a second engaging portion having a double wall structure by folding the tip side inward; The first engaging part and the second engaging part contact the object to be packaged and engage with each other so that they can be attached and detached in a normal direction perpendicular to the erection direction, but cannot be attached and detached in the erection direction.

In this case, the first flap includes a first proximal wall connected to the other end of one of the first walls, and extends from a tip of the first proximal wall, is folded back inward, and extends from the distal end of the first proximal wall. at least one first engagement wall constituting one engagement portion; a first tip wall that is connected to the tip of the first engagement wall and is disposed opposite to the inner surface of the first proximal wall; , is connected to both ends of at least one of the first base end wall and the first tip wall in the width direction perpendicular to the construction direction and the normal direction, and is folded back inward to connect the first base end wall and the first end wall. and at least a pair of first clamping walls sandwiched between the second flap and the first distal wall, and the second flap has a second proximal wall connected to the other end of the other first wall; at least one second engagement wall extending from the distal end of the second base end wall and folded inward to form the second engagement portion; and continuous with the distal end of the second engagement wall; a second distal wall disposed opposite to the inner surface of the second proximal wall; and a second distal wall disposed to face the inner surface of the second proximal wall; and a second distal wall that is continuous to both widthwise ends of at least one of the second proximal wall and the second distal wall, and is folded inward. and at least a pair of second clamping walls sandwiched between the second base end wall and the second tip wall.

In this case, at least a pair of end walls are connected to each other at both ends in a width direction perpendicular to the construction direction and the normal direction in at least one of the first wall on one side, the first wall on the other side, and the second wall on the other side. Further, each of the end walls may constitute a cylindrical buffer portion that protects the object to be packaged by rolling the tip side inward.

In this case, the second wall forms a bottom surface on which the object to be packaged is placed, the pair of end walls are connected to both ends of the second wall in the width direction, and each of the first walls , an outer wall connected to an end in the construction direction of the second wall; and a pair of inner sides connected to both ends of the outer wall in the width direction, folded inward and fixed to the inner surface of the outer wall. a wall, an interlocking wall is constructed between each of the end walls and each of the inner walls, and a first slope line serving as a boundary line between the end wall and the interlocking wall; The second inclined line serving as the boundary line between the inner wall and the interlocking wall extends diagonally from the end of the boundary line between the second wall and the outer wall outward in the width direction so as to be spaced apart from each other. In conjunction with the fact that either one of the pair of first walls and the pair of end walls is erected with respect to the second wall, each of the interlocking walls is aligned with the first slope line. It may be folded normally, then reversely folded along the second inclined line, and the other of the pair of first walls and the pair of end walls may be erected with respect to the second wall.

In this case, the second wall forms a bottom surface on which the object to be packaged is placed, and the pair of first walls are sloped so as to approach each other upward from both ends of the second wall in the installation direction. It is also possible to form a curved side surface.

In this case, at least one of the pair of first walls may be formed with a grip hole through which the operator inserts his/her hand.

According to the present invention, the engaged state between the first engaging portion and the second engaging portion can be maintained.

FIG. 1 is a perspective view showing a packaging box according to an embodiment of the present invention. FIG. 2 is a plan view showing a packaging box blank according to an embodiment of the present invention. It is a perspective view showing a state where the inner wall of the packaging box according to one embodiment of the present invention is folded back. It is a perspective view showing the state where the 1st engagement wall and the 2nd engagement wall of the packaging box concerning one embodiment of the present invention are folded back. 5 is a sectional view taken along line VV in FIG. 4. FIG. 5 is a sectional view taken along line VI-VI in FIG. 4. FIG. FIG. 2 is a perspective view showing the middle of standing up side walls and end walls of a packaging box according to an embodiment of the present invention. FIG. 2 is a perspective view showing a state in which side walls and end walls of a packaging box according to an embodiment of the present invention are erected. FIG. 2 is a perspective view showing a state in which one buffer section of the packaging box according to an embodiment of the present invention is formed. FIG. 2 is a perspective view showing a packaging box according to an embodiment of the present invention, with both buffer sections formed. It is a sectional view showing the middle of engagement of the 1st engagement convex part and the 2nd engagement recess of the packaging box concerning one embodiment of the present invention. It is a sectional view showing a state where a first engagement convex part and a second engagement concave part of a packaging box according to an embodiment of the present invention are engaged. It is a top view which shows the blank of the packaging box based on the modification of one Embodiment of this invention. It is a top view which shows the packaging box based on the modification of one Embodiment of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that Fr, Rr, L, R, U, and D shown in the drawings indicate front, rear, left, right, top, and bottom. The front-rear direction (construction direction), the left-right direction (width direction), and the up-down direction (normal direction) are orthogonal to each other. Although terms indicating directions and positions are used in this specification, these terms are used for convenience of explanation and do not limit the technical scope of the present invention. Further, terms indicating direction and position are based on the direction and position of the assembled packaging box.

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

As shown in FIG. 1, the packaging box 1 is formed into a substantially rectangular tube shape with both left and right end surfaces open, and a space for accommodating an article M to be packaged is formed inside the box. The packaging box 1 is constructed between a pair of side walls 12 (first walls) arranged on both sides of the packaged object M in the front-rear direction (construction direction), and a lower end (one end) of the pair of side walls 12, It is provided with a bottom wall 10 (second wall) forming a bottom surface on which the object to be packaged M is placed, and first and second flaps 14 and 15 forming a top surface that covers the upper surface of the object to be packaged M. . Here, as an example, the packaged object M is a substantially rectangular parallelepiped box, but the packaged object M is not limited to this, and may have a size and shape that can be accommodated in the storage space of the packaging box 1. .

The packaging box 1 is formed by assembling blanks 1A shown in FIG. The blank 1A is formed, for example, from a double-sided corrugated cardboard sheet made of paper, in which a front liner 9B and a back liner 9C (see FIG. 1) are attached to the front and back sides of a corrugated medium 9A. The blank 1A is formed by punching out a cardboard sheet made of paper using a cutting die or the like. Note that FIG. 2 shows the front liner 9B side (outer surface side). In this specification, a direction parallel to the core 9A will be referred to as a "stage direction", and a direction perpendicular to the stage direction will be referred to as a "flow direction". "X" shown in the drawings indicates the "stage direction" and "Y" indicates the "flow direction."

[blank]
As shown in FIG. 2, the blank 1A includes a bottom wall 10, a pair of end walls 11, a pair of side walls 12, four interlocking walls 13, a first flap 14, and a second flap 15. ing. Note that in FIG. 2, the pair of end walls 11 are formed symmetrically, and the pair of side walls 12 are formed symmetrically vertically. I will focus on and explain. Similarly, in FIG. 2, the four interlocking walls 13 are vertically and horizontally symmetrically formed, so one interlocking wall 13 will mainly be described.

<Bottom wall, end wall>
The bottom wall 10, which is an example of the second wall, is formed in a substantially rectangular shape that is long in the flow direction. The pair of end walls 11 are connected to both ends of the bottom wall 10 in the flow direction (width direction) via the first folding line L1. Two laminated holes 16 are opened on both sides of the bottom wall 10 in the flow direction, respectively. The four stacked holes 16 are each formed in a substantially rectangular shape and open from the bottom wall 10 to the end wall 11 (end wall main body 20 described later) so as to cross the first folding line L1.

The end wall 11 has an end wall main body 20, three buffer surface parts 21, and a buffer piece 22. The end wall main body 20 is connected to the end of the bottom wall 10 in the flow direction via the first folding line L1. The end wall main body 20 is formed into a substantially trapezoidal shape whose width becomes narrower in the step direction as it moves away from the bottom wall 10 in the flow direction. The three buffer surface parts 21 are arranged in parallel in the step direction via the score line, and are connected to the tip of the end wall main body 20 via the first buffer fold line L11. The buffer pieces 22 are connected to the tips of the three buffer surfaces 21 via the second buffer fold line L12.

The three buffer surface portions 21 are each formed into a substantially rectangular shape and separated by a cut line. The central buffer surface section 21 in the flow direction (first and second buffer fold lines L11, L12) is closer to the bottom wall 10 (base end) than the other two buffer surface sections 21 (first and second buffer fold lines L11, L12). side). That is, the three buffer surface parts 21 are provided in a zigzag (approximately staggered shape).

<Side wall>
The pair of side walls 12 extend in directions away from each other from both ends of the bottom wall 10 in the step direction. The side wall 12 has an outer wall 23 and a pair of inner walls 24. In FIG. 2, since the pair of inner walls 24 are formed symmetrically, the following explanation will focus on one inner wall 24, unless it is clearly stated that they are a pair.

(outside wall)
The outer wall 23 is formed in a substantially rectangular shape that is elongated in the step direction, and is connected to the end of the bottom wall 10 in the step direction (construction direction) via the second folding line L2. A substantially elliptical gripping hole 25 into which an operator inserts his/her hand when transporting the packaging box 1 is formed on the tip side (upper side) of the outer wall 23 . Furthermore, a gripping piece 25A is connected to the upper edge of the gripping hole 25 via a gripping fold line L13.

(inner wall)
The pair of inner walls 24 are connected to both ends of the outer wall 23 in the flow direction (width direction) via the first fold line L1. The inner wall 24 has one side on the bottom wall 10 side (lower side) inclined, and is formed into a substantially trapezoidal shape that becomes narrower in the step direction as it moves away from the outer wall 23 in the flow direction. The dimension (extension dimension) of the inner wall 24 in the flow direction is set to be slightly shorter than half of the dimension of the outer wall 23 in the flow direction. A substantially semicircular grip recess 26 is provided at the tip of the inner wall 24 in the flow direction. The grip recess 26 is provided to prevent the grip hole 25 from being blocked by the inner wall 24 when the inner wall 24 is folded back and stacked on the inner surface of the outer wall 23 .

<Interlocking wall>
The four interlocking walls 13 are each constructed between the end wall 11 and the inner wall 24. Specifically, the interlocking wall 13 is connected to the end wall main body 20 of the end wall 11 via the first slope line L3, and is connected to the inner wall 24 via the second slope line L4. The first slope line L3, which is the boundary line between the end wall 11 (end wall main body 20) and the interlocking wall 13, and the second slope line L4, which is the boundary line between the inner wall 24 and the interlocking wall 13, are at the second fold. They extend obliquely from the end of the curve L2 (boundary line between the bottom wall 10 and the outer wall 23) toward the outside in the flow direction (width direction) so as to be spaced apart from each other. That is, the first and second inclined lines L3 and L4 are formed in a substantially V shape.

<1st flap>
The first flap 14 is connected to the tip of one side wall 12 in the step direction. The dimension of the entire first flap 14 in the step direction is set shorter than the dimension of the bottom wall 10 in the step direction. The first flap 14 has a first base wall 30, two first engagement walls 31, a first tip wall 32, and a pair of first clamping walls 33. In addition, in FIG. 2, since the two first engaging walls 31 and the pair of first clamping walls 33 are formed symmetrically, hereinafter, unless it is specified that there are two or a pair, The explanation will focus on one part.

(First proximal wall)
The first base wall 30 is connected to the tip of the outer wall 23 of one side wall 12 in the step direction via the first base fold line L5. The first base end wall 30 is formed in a substantially rectangular shape.

(first engagement wall)
The first engagement wall 31 extends from the tip of the first base wall 30. The two first engaging walls 31 are arranged in parallel at intervals in the flow direction in the central region of the first base end wall 30 in the flow direction. At the center of the first engaging wall 31 in the step direction, a first tip fold line L6 extends along the flow direction. The first engagement wall 31 is formed into a substantially hexagonal shape with the first tip fold line L6 being the widest. In other words, the first engagement wall 31 has a shape in which two trapezoids having the first tip fold line L6 as the lower base are connected via the first tip fold line L6.

(First tip wall)
The first tip wall 32 is connected to the tips of the two first engagement walls 31. The first end wall 32 is formed in a substantially rectangular shape that is substantially the same as the first base end wall 30 .

((first engagement hole, first notch))
Furthermore, a first engagement hole 34 and two first notches 35 are formed between the first proximal wall 30 and the first distal wall 32 with the two first engagement walls 31 in between. They are formed in parallel in the direction. The first engagement hole 34 opens between the first base wall 30 and the first tip wall 32 and between the two first engagement walls 31 . The two first notches 35 are open between the first base wall 30 and the first tip wall 32 and on both outer sides of the two first engagement walls 31 in the flow direction.

(First clamping wall)
The pair of first clamping walls 33 are connected to both ends of the first base wall 30 in the flow direction (width direction) via the first folding line L1. Further, the first clamping wall 33 is connected to the tip of the inner wall 24 in the step direction via the first clamping fold line L7.

A protrusion forming hole 17 that is bent so as to protrude toward the distal end side in the step direction is opened in the vicinity of the continuous portion of the first base end wall 30, the first clamping wall 33, and the inner wall 24. A stacked convex portion 18 is provided to protrude toward the inside of the convex portion forming hole 17 in a range that crosses the first folding line L1 at the end portions of the outer wall 23 and the inner wall 24 in the step direction.

<Second flap>
The second flap 15 is connected to the tip of the other side wall 12 in the step direction. The dimension of the entire second flap 15 in the step direction is set shorter than the dimension of the bottom wall 10 in the step direction. The second flap 15 has a second base wall 40, three second engagement walls 41, a second tip wall 42, and a pair of second clamping walls 43. In addition, in FIG. 2, since the pair of second clamping walls 43 are formed symmetrically, the following description will focus on one second clamping wall 43, unless it is specified that they are a pair. do.

(Second proximal wall)
The second base wall 40 is connected to the tip of the outer wall 23 of the other side wall 12 in the step direction via the second base fold line L8. The second base end wall 40 is formed in a substantially rectangular shape.

(Second engagement wall)
The three second engagement walls 41 extend from the tip of the second base end wall 40 and are arranged in parallel at approximately equal intervals in the flow direction. At the center of each second engagement wall 41 in the step direction, a second tip fold line L9 extends along the flow direction. The second engaging wall 41 at the center in the flow direction is formed to have substantially the same shape as the first engaging wall 31. The two second engagement walls 41 on both outer sides in the flow direction are each formed to have substantially the same shape as the first notch 35 .

(Second tip wall)
The second tip wall 42 is connected to the tips of the three second engaging walls 41. The second tip wall 42 is formed into a substantially rectangular shape that is substantially the same as the second base wall 40 .

((2nd engagement hole))
Moreover, two second engagement holes 44 are formed between the second base end wall 40 and the second tip wall 42 in parallel in the flow direction with the second engagement wall 41 in between. The two second engagement holes 44 are open between the second base wall 40 and the second tip wall 42 and between the three second engagement walls 41 .

(Second clamping wall)
The pair of second clamping walls 43 are connected to both ends of the second base wall 40 in the flow direction via the first folding line L1. Further, the second clamping wall 43 is connected to the tip of the inner wall 24 in the step direction via the second clamping fold line L10. Note that a convex forming hole 17 is opened near the continuous portion of the second proximal end wall 40, the second clamping wall 43, and the inner wall 24, and a laminated convex portion is formed at the tips of the outer wall 23 and the inner wall 24. 18 is provided to protrude toward the inside of the convex portion forming hole 17.

In addition, the second folding line L2, the first inclined line L3, the first base folding line L5, the first tip folding line L6, the second base folding line L8, the second tip folding line L9 and the gripping folding line L13 are used to connect the corrugated cardboard sheet to the back liner. This is a general-purpose ruled line crushed in the thickness direction from the 9C side. The general-purpose ruled line mainly has the function of folding (normally folding) the corrugated cardboard sheet so that the back liner 9C faces inward. The second inclined line L4, the first pinched fold line L7, and the second pinched fold line L10 are reverse ruled lines obtained by crushing the corrugated cardboard sheet in the thickness direction from the front liner 9B side. The reverse ruled line mainly has the function of folding (reverse folding) the corrugated cardboard sheet so that the front liner 9B faces inward. The first folding line L1, the first buffer folding line L11, and the second buffer folding line L12 are lead ruled lines in which perforations are formed on general-purpose ruled lines. The lead rule has the function of folding the corrugated cardboard sheet normally or in reverse. The line used for folding the corrugated cardboard sheet is not limited to the above example, and may be any line such as a perforation line for folding the corrugated cardboard sheet in a desired direction. Note that the base end side of the second inclined line L4 (the side of the intersection with the second folding line L2) is a cutting line.

[Assembling packaging boxes and packaging items]
Next, with reference to FIGS. 3 to 10, FIG. 11A, and FIG. 11B, an example of an assembly procedure for the packaging box 1 and a procedure for packaging the packaged object M will be described. FIG. 3 is a perspective view showing the state in which the inner wall 24 is folded back. FIG. 4 is a perspective view showing a state in which the first engagement wall 31 and the second engagement wall 41 are folded back. FIG. 5 is a sectional view taken along the line VV in FIG. 4. FIG. 6 is a sectional view taken along line VI-VI in FIG. FIG. 7 is a perspective view showing the middle of raising the side wall 12 and end wall 11. FIG. 8 is a perspective view showing the side wall 12 and end wall 11 in an upright state. FIG. 9 is a perspective view showing a state in which one of the buffer sections 27 is formed. FIG. 10 is a perspective view showing a state in which both buffer sections 27 are formed. FIG. 11A is a cross-sectional view showing a state in which the first engagement protrusion 36 and the second engagement recess 47 are engaged with each other. FIG. 11B is a sectional view showing a state in which the first engagement protrusion 36 and the second engagement recess 47 are engaged. Note that the packaging box 1 may be assembled manually by an operator, or may be assembled fully or semi-automatically using a box-making machine (not shown). Here, as an example, a case will be described in which the packaging box 1 is assembled manually.

The operator applies adhesive to the inner surface (back liner 9C) of each inner wall 24, and as shown in FIG. 3, the pair of end walls 11, the two pairs of inner walls 24 (four interlocking walls 13), The pair of first clamping walls 33 and the pair of second clamping walls 43 are folded back inward (normally folded) along the first folding line L1. Each end wall 11 is arranged opposite to the inner surface of the bottom wall 10. Each inner wall 24 is folded inward and fixed to the inner surface of the outer wall 23 with an adhesive. The gripping recesses 26 of the inner wall 24 are arranged to correspond to the gripping holes 25 of the outer wall 23. Each of the first and second clamping walls 33 and 43 is arranged to face the inner surface of the first and second proximal walls 30 and 40. Each laminated convex portion 18 is folded back along the first folding line L1 to form a double wall structure. Note that the tips of the pair of end walls 11 and the like are spaced apart from each other. Further, as the adhesive, for example, a hot melt adhesive, an aqueous emulsion adhesive, or the like may be used, or a double-sided tape may be used.

As shown in FIGS. 4 and 5, the operator folds back the first flap 14 (first engagement wall 31) inward along the first end fold line L6. The first distal wall 32 is arranged to face the inner surface of the first proximal wall 30 with a pair of first clamping walls 33 in between. The pair of first clamping walls 33 folded back inward are clamped between the first proximal wall 30 and the first distal wall 32 (see FIG. 5). By folding the distal end side of the first flap 14 inward, two first engaging convex portions 36 (first engaging portions) having a double wall structure are formed. Further, the first engagement hole 34 and the two first notches 35 constitute three first engagement recesses 37 (first engagement portions) having a double wall thickness. In other words, an uneven shape is formed on the tip side of the first flap 14. The first engagement convex portion 36 is formed into a substantially trapezoidal shape that widens in the left-right direction from the base end (first base end wall 30, etc.) toward the distal end (first end fold line L6) when viewed from above (Fig. (see 4). Since the first proximal wall 30 and the first distal wall 32 form a triple wall with the first sandwiching wall 33 in between, the first engagement convex portion 36 extends from the distal end to the proximal end when viewed from the side (or cross section). It is formed into a substantially triangular (wedge-shaped) shape in which the thickness increases toward the tip (see FIG. 5). The first engagement recess 37 at the center in the left-right direction is formed into a substantially trapezoidal shape that narrows in the left-right direction from the base end toward the distal end when viewed from above (see FIG. 4). The two first engagement recesses 37 on both outer sides in the left-right direction are formed in a substantially trapezoidal shape with the inner side in the left-right direction inclined outward from the base end toward the distal end when viewed from a plane (FIG. 4). reference).

Further, as shown in FIGS. 4 and 6, the operator folds back the second flap 15 (second engagement wall 41) inward along the second tip fold line L9. The second tip wall 42 is arranged to face the inner surface of the second proximal wall 40 with a pair of second holding walls 43 in between. A pair of second clamping walls 43 folded back inward are clamped between the second base end wall 40 and the second tip wall 42 (see FIG. 6). By folding the tip side of the second flap 15 inward, three second engaging convex portions 46 (second engaging portions) having a double wall structure are formed. Further, the two second engagement holes 44 constitute two second engagement recesses 47 (second engagement portions) having a double wall thickness. That is, on the distal end side of the second flap 15, an uneven shape complementary to the uneven shape of the first flap 14 is formed. The second engagement convex portion 46 at the center in the left-right direction is formed into a substantially trapezoidal shape that widens in the left-right direction from the base end (second base end wall 40, etc.) toward the tip (second end fold line L9) when viewed from above. (See Figure 4). The two second engagement protrusions 46 on both outer sides in the left-right direction are formed into a substantially trapezoidal shape with the inner side in the left-right direction inclined outward from the base end toward the distal end when viewed from a plane (see FIG. (see 4). Since the second proximal end wall 40 and the second distal end wall 42 constitute a triple wall with the second clamping wall 43 in between, the second engagement protrusion 46 extends from the distal end to the proximal end when viewed from the side (or cross section). It is formed into a substantially triangular (wedge-shaped) shape in which the thickness increases toward the end (see FIG. 6). The two second engagement recesses 47 are formed into a substantially trapezoidal shape that narrows in the left-right direction from the base end toward the distal end when viewed from above (see FIG. 4).

Next, as shown in FIG. 7, the worker grasps the pair of side walls 12 or the first and second flaps 14, 15, bends the pair of side walls 12 upward along the second folding line L2, and then The side wall 12 of is erected against the bottom wall 10. In conjunction with the pair of side walls 12 being erected with respect to the bottom wall 10, each interlocking wall 13 is folded normally along the first slope line L3, reversely folded along the second slope line L4, and then An end wall 11 is erected against a bottom wall 10. That is, in conjunction with the raising of the pair of side walls 12, the pair of end walls 11 are automatically raised.

Note that in the above description, the worker grasps the pair of side walls 12 and stands the pair of side walls 12 up against the bottom wall 10, but the present invention is not limited to this. The operator may hold the pair of end walls 11 and make the pair of end walls 11 stand up against the bottom wall 10. In this case, in conjunction with the pair of end walls 11 being erected relative to the bottom wall 10, each interlocking wall 13 is folded in opposite directions along the first and second slope lines L3 and L4, A pair of side walls 12 are erected against the bottom wall 10.

After raising the end wall 11 and the side wall 12 substantially vertically, the worker inserts the object M into the area surrounded by the pair of end walls 11 and the four interlocking walls 13 and places it on the bottom wall 10. place Here, before placing the object to be packaged M on the bottom wall 10, the operator changes the shape of the end wall 11 according to the dimension of the object to be packaged M in the left and right direction.

For example, when the left-right dimension of the packaged object M is approximately the same as the left-right dimension of the bottom wall 10, the buffer surface portion 21 and the buffer piece 22 are not bent and the pair of ends The wall 11 stands upright from the bottom wall 10. When the object M is placed on the bottom wall 10 in this state, the inner surfaces (back liner 9C) of the pair of end walls 11 come into contact with both left and right side surfaces of the object M.

Further, for example, when the horizontal dimension of the packaged object M is slightly smaller than the horizontal dimension of the bottom wall 10, the operator must move one of the pair of end walls 11 (see FIG. Now let's change the shape of the left side). The operator bends the three buffer surface parts 21 inwardly along the first buffer fold line L11, and bends the buffer piece 22 downward along the second buffer fold line L12. By rolling the three buffer surface parts 21 and the buffer pieces 22 inward, a substantially cylindrical (more precisely, inverted U-shape) buffer part 27 is formed. The three buffer surface parts 21 constitute the upper surface of the buffer part 27, and the buffer pieces 22 constitute the inner surface of the buffer part 27. Since the central buffer surface portion 21 in the front-rear direction is shifted outward in the left-right direction from the other two buffer surface portions 21, the central buffer surface portion 21 is inclined downward from the inside to the outside in the left-right direction, and The two buffer surface portions 21 are inclined downward from the outside to the inside in the left-right direction. In this state, when the packaged item M is placed on the bottom wall 10, the buffer portion 27 (buffer piece 22) and the inner surface of the entire other end wall 11 (back liner 9C) are placed on both left and right sides of the packaged item M. Contact. Since the slopes of the three buffer surfaces 21 are staggered, the buffer portions 27 (buffer pieces 22) come into contact with the packaged object M with elasticity and soften the impact, etc. applied to the packaged object M. Thereby, the packaged object M can be protected from impacts and the like.

Further, for example, if the horizontal dimension of the packaged object M is considerably smaller than the horizontal dimension of the bottom wall 10, the operator should move the tip sides of the pair of end walls 11 inward, as shown in FIG. It is rolled up to form a pair of buffer sections 27. When the object M is placed on the bottom wall 10 in this state, the pair of buffer sections 27 (buffer pieces 22) come into contact with both left and right side surfaces of the object M.

Next, the operator connects the first flap 14 and the second flap 15 to form the top surface of the packaging box 1. As shown in FIG. 11A, the operator moves the first proximal end wall 30 and the first clamping wall 33 of the first flap 14 along the first proximal fold line L5 and the first clamping wall while bringing the pair of side walls 12 slightly closer together. It is bent downward along the fold line L7, and the second proximal end wall 40 and second clamping wall 43 of the second flap 15 are bent downward along the second proximal fold line L8 and the second clamping fold line L10.

As shown in FIGS. 1 and 11B, while fitting the two first engagement convex portions 36 of the first flap 14 into the two second engagement recesses 47 of the second flap 15, the operator The first and second flaps 14 and 15 are bent while fitting the three second engagement convex portions 46 of No. 15 into the three first engagement recesses 37 of the first flap 14. The first flap 14 extends approximately horizontally from the upper end of the front side wall 12 toward the rear side wall 12, and the second flap 15 extends approximately horizontally from the upper end of the rear side wall 12 toward the front side wall 12. This forms the top surface of the packaging box 1. In this state, the first engagement protrusion 36 is fitted into the second engagement recess 47, and the second engagement protrusion 46 is fitted into the first engagement recess 37. The first and second engaging protrusions 36 and 46 contact the packaged object M (top surface) (see FIG. 11B), and are engaged ( mating). Moreover, the first tip wall 32 and the second tip wall 42 are also in contact with the upper surface of the object to be packaged M (see FIG. 11B).

Finally, the operator uses adhesive tape, delivery slips, etc. (not shown) to cover the engaging portions between the first and second engaging protrusions 36 and 46 and the first and second engaging recesses 37 and 47. ). Through the above steps, the assembly of the packaging box 1 is completed, and the object to be packaged M is packaged (see FIG. 1). In the completed packaging box 1, the pair of side walls 12 form side surfaces that are sloped so as to approach each other upward from both ends of the bottom wall 10 in the front-rear direction (see FIG. 1). Therefore, the packaging box 1 is formed into a substantially trapezoidal shape when viewed from the side.

Further, a plurality of packaging boxes 1 can be stacked vertically (not shown). When a plurality of packaging boxes 1 are stacked, the four stacking convex portions 18 of the lower packaging box 1 fit into the four stacking holes 16 opened in the bottom wall 10 of the upper packaging box 1. Since the lamination hole 16 also opens in the end wall 11 (end wall main body 20), it is possible to visually confirm from the outside that the lamination convex portion 18 is fitted into the lamination hole 16.

In the packaging box 1 according to the present embodiment described above, the first engagement protrusion 36 and the first engagement recess 37 are formed by folding back the tip side of the first flap 14, and the tip side of the second flap 15 is folded back. By folding back the second engaging convex portion 46 and the second engaging concave portion 47 are formed. According to this configuration, the first and second engagement protrusions 36 and 46 and the first and second engagement recesses 37 and 47 have a double wall thickness, and therefore can be made thicker than a single wall thickness. . As a result, even if the first and second engagement protrusions 36 and 46 are slightly shifted upward, they do not easily come off from the first and second engagement recesses 37 and 47, and the first and second engagement The engaged state between the protrusions 36 and 46 and the first and second engaging recesses 37 and 47 can be maintained.

Furthermore, in the packaging box 1 according to the present embodiment, the first clamping wall 33 is sandwiched between the first proximal wall 30 and the first tip wall 32, and the second clamping wall 43 is sandwiched between the second proximal wall 40 and the second distal wall 32. The structure is such that it is sandwiched between the tip wall 42 (see FIGS. 5 and 6). According to this configuration, the base that supports the first engagement protrusion 36 and the second engagement protrusion 46 has a triple wall structure, so that the first engagement protrusion 36 and the second engagement protrusion 46 are It can be formed into a wedge shape that becomes thicker from the distal end to the proximal end. This makes it even more difficult for the first and second engagement protrusions 36 and 46 that have fitted into the first and second engagement recesses 37 and 47 to come off, so that the first and second engagement protrusions 36 and 46 The state of engagement with the first and second engagement recesses 37 and 47 can be maintained favorably.

Furthermore, in the packaging box 1 according to the present embodiment, each end wall 11 constitutes a cylindrical buffer section 27 that protects the packaged object M by rolling the tip side inward (see FIG. 10). . According to this configuration, for example, by bringing the pair of buffer portions 27 into contact with both left and right sides of the object M, the object M can be protected from impact and the like. Depending on the size (horizontal dimension) of the item M to be packaged, for example, only one buffer portion 27 may be formed and the buffer portion 27 and the end wall 11 may be brought into contact with both the left and right sides of the item M to be packaged. (See FIG. 9), or the pair of end walls 11 may be brought into contact with both left and right sides of the packaged object M (see FIG. 8) without forming the buffer portion 27. In this way, the end wall 11 (buffer section 27) has a function as a spacer in addition to a function as a buffer material, and the installation space for the object M to be packaged can be changed depending on the size of the object M to be packaged. can do.

Moreover, according to the packaging box 1 according to the present embodiment, when the pair of side walls 12 are erected with respect to the bottom wall 10, each interlocking wall 13 has a first slope line L3 and a second slope line L4. A pair of end walls 11 are configured to stand up against a bottom wall 10 while being bent in opposite directions. According to this configuration, the end wall 11 can be placed in the upright position in conjunction with the uprighting of the side wall 12. Thereby, the work of packaging the object to be packaged M can be performed quickly and smoothly.

Moreover, since the packaging box 1 according to the present embodiment is formed into a substantially trapezoidal shape when viewed from the side, it is stable with the bottom wall 10 in contact with the floor. Thereby, it is possible to suppress the packaging box 1 from falling over.

For example, when a worker puts one hand into the grip hole 25 formed in one side wall 12 and carries it, a force acts on the first and second flaps 14 and 15 to separate them in the front-rear direction (installation direction). . According to the packaging box 1 according to the present embodiment, the first and second engagement protrusions 36 and 46 and the first and second engagement recesses 37 and 47 are not attachable or detachable in the front-rear direction. - The second engagement protrusions 36, 46 do not separate from the first and second engagement recesses 37, 47. Thereby, even if the packaging box 1 is held with one hand, the state of engagement between the first and second engagement protrusions 36 and 46 and the first and second engagement recesses 37 and 47 can be maintained.

In the packaging box 1 according to the present embodiment, the first flap 14 is provided with two first engagement walls 31, and the first flap 14 is provided with two first engagement protrusions 36 and three first engagement walls 31. A recess 37 is formed, three second engagement walls 41 are provided on the second flap 15, and three second engagement protrusions 46 and two second engagement recesses 47 are formed on the second flap 15. However, the present invention is not limited to this. For example, the first flap 14 may be provided with one or more first engagement walls 31, the second flap 15 may be provided with two or more second engagement walls 41, or the first flap 14 may be provided with two or more second engagement walls 31. More than one first engagement wall 31 may be provided, and the second flap 15 may be provided with one or more second engagement wall 41 (not shown). As described above, the first flap 14 may be provided with at least one first engagement wall 31 and folded back inward to form (at least one) first engagement convex portion 36 or the like. Similarly, the second flap 15 may be provided with at least one second engagement wall 41 and folded back inward to form (at least one) second engagement convex portion 46 or the like.

Furthermore, in the packaging box 1 according to the present embodiment, the first and second engaging protrusions 36 and 46 (the first and second engaging recesses 37 and 47) were formed in a substantially trapezoidal shape; However, it may be triangular, pentagonal, circular, or the like (not shown), and may have any shape as long as it cannot be attached or detached in the front-rear direction (construction direction) in the engaged state.

In addition, as a modified example, as shown in FIG. As shown in FIG. 13, the first and second engaging portions 53 and 63 are formed into a hook shape by folding back the first and second engaging walls 51 and 61 at the first and second tip fold lines L6 and L9. may be formed. The hook portion 52 of the first engaging portion 53 and the hook portion 62 of the second engaging portion 63 are irremovably engaged (engaged) in the front-rear direction. Note that two or more first engagement walls 51 and two or more second engagement walls 61 may be provided (not shown). Further, the first and second engaging portions 53 and 63 may be formed into a substantially L-shape by omitting the return portions of the hook portions 52 and 62 (not shown).

Furthermore, in the packaging box 1 according to the present embodiment (including modified examples; the same applies hereinafter), the first and second engagement walls 31, 41, 51, and 61 are connected to the first and second base walls 30, 40. Although it is constructed between the first and second end walls 32 and 42, the present invention is not limited thereto. For example, the first and second distal walls 32 and 42 may be omitted, or the first and second proximal walls 30 and 40 and the first and second distal walls 32 and 42 may be omitted ( (not shown). In these cases, the first and second holding walls 33 and 43 are also omitted. Moreover, when the first and second base walls 30 and 40 and the first and second tip walls 32 and 42 are omitted, the first and second engagement walls 31, 41, 51, 61 are different from the side wall 12 ( (not shown).

Further, in the packaging box 1 according to the present embodiment, the first flap 14 and the second flap 15 form the top surface, but the present invention is not limited to this. For example, the first flap 14 and the second flap 15 may form the sides of the packaging box (not shown). In this case, one of the pair of first walls arranged with the object to be packaged M between them forms the bottom surface, the other one forms the top surface, and the first wall constructed between the ends of the pair of first walls Two walls form side surfaces facing the first and second flaps 14 and 15 (not shown). Moreover, in this case, the grip hole 25 is opened in the first wall forming the top surface.

Furthermore, in the packaging box 1 according to the present embodiment, the pair of first clamping walls 33 are connected to the first base wall 30, and the pair of second clamping walls 43 are connected to the second base wall 40. However, the present invention is not limited to this. The pair of first and second clamping walls 33 and 43 may be connected to both left and right ends of the first and second tip walls 32 and 42 instead of the first and second base walls 30 and 40. , may be connected to both left and right ends of the first and second base walls 30 and 40 and the first and second tip walls 32 and 42 (not shown). Furthermore, although the first and second clamping walls 33 and 43 are connected to the inner wall 24, they may be separated from the inner wall 24 (not shown). Further, the first and second holding walls 33 and 43 may be omitted.

Further, in the packaging box 1 according to the present embodiment, the side wall 12 has a double wall formed by the outer wall 23 and the inner wall 24, but the present invention is not limited to this. The inner wall 24 may be omitted and the side wall 12 may be composed of only the outer wall 23 (single wall) (not shown). Furthermore, the end wall 11 and the interlocking wall 13 may also be omitted.

Furthermore, in the packaging box 1 according to the present embodiment, the pair of end walls 11 are connected to both ends of the bottom wall 10 in the left-right direction, but the present invention is not limited thereto. For example, instead of the bottom wall 10, the pair of end walls 11 may be connected to both left and right ends of one or the other of the pair of side walls 12 (not shown). In addition, when the end wall 11 is provided on the side wall 12, the side wall 12 is made into a single wall by omitting the inner wall 24. Furthermore, for example, in addition to the bottom wall 10, the two pairs of end walls 11 may be connected to one or the other of the pair of side walls 12 (not shown). That is, it is sufficient that at least one pair of end walls 11 are connected to each other at both widthwise ends of one side wall 12, the other side wall 12, and at least one of the bottom wall 10.

Further, in the packaging box 1 according to the present embodiment, the three buffer surface portions 21 are provided on the end wall 11, but the present invention is not limited to this. For example, two buffer surface sections 21 may be provided, or four or more buffer surface sections 21 may be provided (not shown). Further, the buffer surface portion 21 and the buffer piece 22 may be omitted.

Further, in the packaging box 1 according to the present embodiment, the grip holes 25 are formed in each of the pair of side walls 12, but the present invention is not limited to this. The grip hole 25 may be formed in at least one of the pair of side walls 12 . Furthermore, the gripping hole 25 may be omitted.

Furthermore, in the packaging box 1 according to the present embodiment, the pair of side walls 12 are inclined upwardly from both the front and rear ends of the bottom wall 10, but the present invention is not limited thereto. For example, the pair of side walls 12 may be erected substantially vertically upward from both the front and rear ends of the bottom wall 10, or may be inclined upward from both the front and rear ends of the bottom wall 10 so as to be spaced apart from each other. (not shown).

Furthermore, in the packaging box 1 according to the present embodiment, the lamination hole 16 was opened in the bottom wall 10 and the lamination convex portion 18 (convex formation hole 17) was formed in the side wall 12; Section 18 may be omitted.

Further, the packaging box 1 according to the present embodiment is formed of a double-sided corrugated cardboard sheet made of paper, but is not limited to this, and can be made of a single-sided corrugated sheet, a double-sided corrugated sheet, cardboard, or a resin board (sheet). It may also be formed by Moreover, although the packaging box 1 is formed in the shape of a substantially rectangular parallelepiped, the present invention is not limited to this, and a corner cut surface may be provided at the corner edge of the rectangular parallelepiped (not shown). That is, the packaging box 1 may be formed into a polygonal shape such as a hexagon or an octagon when viewed from a plane or a side. Further, 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 corrugated cardboard 9A extends, etc. may be freely changed.

Note 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. The technical scope of the present invention is not limited to the above embodiments. The present invention may be variously changed, replaced, and modified without departing from the spirit of the technical idea, and the scope of the claims includes all embodiments that can be included within the scope of the technical idea.

1 Packaging box 10 Bottom wall (second wall)
11 End wall 12 Side wall (first wall)
13 Interlocking wall 14 First flap 15 Second flap 23 Outer wall 24 Inner wall 25 Gripping hole 27 Buffer part 30 First proximal wall 31, 51 First engaging wall 32 First tip wall 33 First clamping wall 36 First Engagement convex part (first engagement part)
37 First engagement recess (first engagement part)
40 Second base end wall 41, 61 Second engagement wall 42 Second tip wall 43 Second clamping wall 46 Second engagement convex portion (second engagement portion)
47 Second engagement recess (second engagement part)
53 First engaging part 63 Second engaging part L2 Second folding line (boundary line)
L3 First inclined line L4 Second inclined line M Item to be packaged

Claims (6)

a pair of first walls (12) disposed on both sides of the object to be packaged (M) in the construction direction;
a second wall (10) constructed between one end of the pair of first walls;
A first engaging portion (36, 37, 53) extends from the other end of one of the first walls toward the other first wall, and has a double wall structure by folding the tip end inward. a first flap (14) formed;
A second engaging portion (46, 47, 63) extends from the other end of the other first wall toward one of the first walls, and has a double wall structure by folding the tip side inward. a second flap (15) formed;
The first engaging part and the second engaging part are in contact with the object to be packaged, and are engaged so that they can be attached and detached in a normal direction perpendicular to the erection direction, and cannot be attached and detached in the erection direction. A packaging box featuring: The first flap is
a first proximal wall (30) connected to the other end of one of the first walls;
at least one first engagement wall (31, 51) extending from the tip of the first proximal wall and folded inward to form the first engagement part;
a first tip wall (32) connected to the tip of the first engagement wall and arranged to face the inner surface of the first proximal wall;
At least one of the first base end wall and the first tip wall is connected to both ends in the width direction perpendicular to the construction direction and the normal direction, and is folded inward to connect the first base wall and the first end wall. at least a pair of first clamping walls (33) sandwiched between the tip wall and the tip wall;
The second flap is
a second proximal wall (40) connected to the other end of the other first wall;
at least one second engagement wall (41, 61) extending from the tip of the second base end wall and folded inward to form the second engagement portion;
a second tip wall (42) connected to the tip of the second engagement wall and arranged to face the inner surface of the second proximal wall;
At least one of at least one of the second base wall and the second tip wall is connected to both widthwise ends of the second base wall and the second tip wall, and is folded inward and held between the second base wall and the second tip wall. The packaging box according to claim 1, further comprising a pair of second clamping walls (43). At least a pair of end walls (11) connected to both ends in the width direction perpendicular to the construction direction and the normal direction in at least one of the first wall on one side and the first wall and the second wall on the other side. further comprising;
The packaging box according to claim 1 or 2, wherein each of the end walls constitutes a cylindrical buffer portion (27) that protects the packaged object by rolling the tip side inward. the second wall forms a bottom surface on which the object to be packaged is placed;
The pair of end walls are connected to both widthwise ends of the second wall,
Each of the first walls is
an outer wall (23) connected to an end of the second wall in the construction direction;
a pair of inner walls (24) connected to both ends of the outer wall in the width direction, folded inward and fixed to the inner surface of the outer wall;
An interlocking wall (13) is constructed between each of the end walls and each of the inner walls,
A first slope line (L3) serving as a boundary line between the end wall and the interlocking wall and a second slope line (L4) serving as a boundary line between the inner wall and the interlocking wall are the same as the second wall. extending obliquely from the end of the boundary line (L2) with the outer wall toward the outside in the width direction so as to be spaced apart from each other;
In conjunction with the fact that one of the pair of first walls and the pair of end walls is erected with respect to the second wall, each of the interlocking walls is folded normally along the first slope line. 4. The package according to claim 3, wherein the package is reversely folded along the second inclined line, and the other of the pair of first walls and the pair of end walls is erected with respect to the second wall. box. the second wall forms a bottom surface on which the object to be packaged is placed;
5. The pair of first walls form side surfaces that are inclined upwardly toward each other from both ends of the second wall in the construction direction. packaging box. The packaging box according to any one of claims 1 to 5, wherein at least one of the pair of first walls is formed with a grip hole (25) through which an operator inserts his/her hand.

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