JP7081933B2 - Packaging box - Google Patents

Description

The present invention relates to a packaging box.

A packaging box that can be sealed without using an adhesive tape or the like is known.

For example, in the packaging box described in Patent Document 1, the insertion piece connected to the end edge of the lid flap is inserted into the inner side of the side plate of the box body, and the locking provided on the side plate so as to be foldable. The piece is configured to be inserted into the locking port of the insertion piece. The locking piece has an insertion portion and a second locking piece that is folded back (downward) at its tip. The insertion piece has a receiving piece that can be folded inward on the inner side of the box of the locking port. The receiving piece receives the second locking piece and makes the tip of the second locking piece correspond to the portion below the locking opening, making it impossible to pull back the locking piece. In addition, the lid flap is provided with a planned turning portion that can be cut and raised by dividing the perforation. The structure is such that the locking piece and the insertion piece cannot be released unless the planned turning portion is divided by the perforation. In this way, when the locking piece is pulled back, a mark of opening remains, so that unauthorized opening can be suppressed.

Japanese Patent No. 4238650

However, in the above-mentioned packaging box, the second locking piece had to be folded back with respect to the insertion portion, and the double-layered locking piece had to be inserted into the locking opening. Therefore, the work of folding back the locking piece is complicated, and it cannot be said that the operation of pointing the locking piece is easy. In addition, if the direction in which the second locking piece is folded back is incorrect with respect to the insertion portion, the receiving piece cannot receive the second locking piece, and the locking piece can be pulled out and returned. It was also assumed that it could not be suppressed.

In order to solve the above problems, the present invention provides a packaging box in which an insertion piece can be easily inserted into an insertion port and the insertion piece can be suppressed from coming off from the insertion port.

In order to achieve the above-mentioned object, the packaging box of the present invention has a facing wall arranged so as to sandwich a storage space for contents between the foundation wall and the foundation wall, and an end in the first direction of the foundation wall. A side wall extending from the portion toward the facing wall, an inner folding wall extending from the side end of the side wall along the end in the second direction intersecting the first direction of the foundation wall, and the above. An inner wall including an insertion port extending from the second end of the foundation wall toward the facing wall, overlapping the outside of the inner folding wall, and formed along the boundary with the foundation wall. The outlet is connected to the end of the facing wall in the second direction and is laminated on the outside of the inner wall, and is connected to the tip of the outer wall, and is in a posture along the foundation wall. The inner folding wall is provided with an engaging piece extending inward, and the insertion piece is provided with the engaging piece in a posture along the foundation wall. An engaging hole to be fitted is formed.

In this case, the frame portion extending inward from the tip portion of the inner layer wall and the frame portion extending inward from the tip portion of the frame portion toward the foundation wall and facing the inner layer wall with the inner folded wall interposed therebetween. It is preferable that the folded wall is further provided, and the tip end portion of the folded wall is provided with an auxiliary piece for pressing the engaging piece fitted in the engaging hole of the insertion piece.

In this case, it is preferable that the inner folded wall is provided with a mounting piece that extends inward at a position away from the engaging piece and is arranged between the foundation wall and the contents.

In this case, it is preferable that the outer layer wall is formed with a cutting line for separating the insertion piece from the outer layer wall.

According to the present invention, the insertion piece can be easily inserted into the insertion port, and the insertion piece can be suppressed from coming off from the insertion port.

It is a perspective view which shows the packaging box which concerns on one Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on one Embodiment of this invention. It is a perspective view explaining the assembly work of the packaging box which concerns on one Embodiment of this invention. It is a perspective view explaining the assembly work of the packaging box and the accommodation work of contents which concerns on one Embodiment of this invention. FIG. 6 is a sectional view taken along line VV of FIG. It is sectional drawing explaining the sealing work of the packaging box which concerns on one Embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line VII-VII of FIG. It is a perspective view which shows the front wall, the insertion piece and the like of the packaging box which concerns on one Embodiment of this invention. It is a perspective view which shows the state which opened the packaging box which concerns on one Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on the modification of one Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on another modification of one Embodiment of this invention. It is a top view which shows a part of the blank of the packaging box which concerns on another modification of one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawing, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates "U". "Upper" and "D" indicate "lower". The left-right direction (first direction) is orthogonal (crosses) to the front-back direction (second direction), and the up-down direction is orthogonal (crosses) to the front-back direction and the left-right direction. Although terms indicating directions and positions are used in the present specification, these terms are used for convenience of explanation and do not limit the technical scope of the present invention.

The configuration of 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. 2 is a plan view showing the blank 5 of the packaging box 1.

[Overview of packaging box]
As shown in FIG. 1, the packaging box 1 is formed in a substantially rectangular parallelepiped shape that is long in the left-right direction and short. The packaging box 1 is a so-called N-type box in which the upper surface opening is closed by the lid wall 13. Inside the packaging box 1, for example, two contents M arranged in the left-right direction are housed (see FIG. 4 and the like). The content M is formed in a substantially rectangular parallelepiped shape.

The packaging box 1 is formed by assembling the blank 5 shown in FIG. The blank 5 is formed by punching a sheet of paper corrugated cardboard with a die or the like. The corrugated cardboard sheet is, for example, a double-sided corrugated cardboard sheet in which a front liner 9B and a back liner 9C (see FIG. 3) are bonded to a corrugated cardboard 9A. Note that FIG. 2 shows the front liner 9B side (outer surface side of the packaging box 1). In the present specification, the direction parallel to the corrugated cardboard inner shin 9A is referred to as "step direction", and the direction orthogonal to the step direction is referred to as "flow direction". “X” shown in the drawing indicates “step direction”, and “Y” indicates “flow direction”. Further, in the present specification, the terms "top (heaven)", "bottom (bottom)" and similar terms are the top (heaven), bottom (bottom) and the like in the assembled state (assembled state) of the packaging box 1. Refers to a concept similar to.

[blank]
As shown in FIG. 2, the blank 5 includes a bottom wall 10 (foundation wall), a front wall 11, a rear wall 12, a lid wall 13 (opposing wall), an outer layer wall 14, and an insertion piece 15. It includes a pair of side walls 16, a pair of inner flaps 17, a pair of front inner folding walls 18, and a pair of rear inner folding walls 19.

The front wall 11, the bottom wall 10, the rear wall 12, the lid wall 13, the outer layer wall 14, and the insertion piece 15 are arranged in a row from one side to the other in this order. The front wall 11, the bottom wall 10, the rear wall 12, and the lid wall 13 are formed in a substantially rectangular shape having substantially the same dimensions in the flow direction. The pair of side walls 16 are provided at positions sandwiching the bottom wall 10 from both sides in the flow direction, and the pair of inner flaps 17 are provided at positions sandwiching the pair of side walls 16 from both sides in the flow direction. The pair of side walls 16, the pair of inner flaps 17, the pair of front inner folding walls 18, and the pair of rear inner folding walls 19 are formed symmetrically in the flow direction with the bottom wall 10 interposed therebetween. Mainly, one side wall 16 and the like will be described.

<Bottom wall, front wall>
The bottom wall 10 as an example of the foundation wall is formed in a substantially rectangular shape long in the flow direction. The front wall 11 is continuously provided at one end in the step direction of the bottom wall 10 via a first folding curve L1 extending in the flow direction. The front wall 11 is formed in a substantially rectangular shape that is long in the flow direction as a whole. A pair of fitting holes 10A are formed in the bottom wall 10 along the first folding curve L1. The pair of fitting holes 10A are formed in a rectangular shape having a width about twice the thickness of the corrugated cardboard sheet, and are opened at positions separated in the flow direction.

(Details of the front wall)
The front wall 11 includes an inner wall 20, a frame portion 21, and a folded wall 22. The inner wall 20, the frame portion 21, and the folded wall 22 are formed in a substantially rectangular shape long in the flow direction.

The inner layer wall 20 is continuously provided at one end in the step direction of the bottom wall 10 via the first folding curve L1. The dimension (extended dimension) in the step direction of the inner layer wall 20 is set shorter than the dimension in the step direction of the bottom wall 10 (for example, half or less).

An insertion port 30 is formed near the center of the inner layer wall 20 in the flow direction (between the pair of fitting holes 10A) along the first folding curve L1 (boundary with the bottom wall 10). The insertion port 30 is a slit cut so as to be convex from the first folding curve L1 toward the inner layer wall 20. The insertion port 30 is formed in a substantially trapezoidal shape (substantially U-shaped) whose width narrows from the first folding curve L1 toward the inner layer wall 20. A pair of hooking portions 30A inclined so as to be separated from each other are formed at both ends of the insertion port 30 in the flow direction. By forming the pair of hooking portions 30A, both ends of the insertion port 30 in the flow direction are formed in a substantially V shape that is convex from the inner layer wall 20 toward the first folding curve L1.

The frame portion 21 is provided between the inner layer wall 20 and the folded wall 22 via two second folding curves L2 extending in the flow direction. The dimension (extended dimension) of the frame portion 21 in the step direction is set to be slightly longer than the thickness of the corrugated cardboard sheet.

The folded wall 22 is continuously provided at one end of the frame portion 21 in the step direction via the second folding curve L2. The folded wall 22 is formed in a substantially rectangular shape having substantially the same size as the inner layer wall 20 (more accurately, slightly shorter in the flow direction than the inner layer wall 20).

A pair of substantially rectangular fitting convex portions 22A are projected from the tip end portion of the folded wall 22. The pair of fitting protrusions 22A are formed at positions separated in the flow direction so as to correspond to the pair of fitting holes 10A of the bottom wall 10.

Further, an auxiliary piece 31 is formed near the center of the tip of the folded wall 22 in the step direction. The auxiliary piece 31 is formed between a pair of cutting edge wires E1 extending in parallel in the step direction near the tip of the folded wall 22. The auxiliary piece 31 is continuously provided to the folding wall 22 via the auxiliary folding curve L10. The auxiliary piece 31 projects from the tip of the folded wall 22 to a position substantially the same as the tip of the fitting convex portion 22A.

Tip recesses 22B are formed on both sides of the folded wall 22 in the flow direction so as to avoid engaging pieces 32 (described later) protruding inward in the flow direction from the pair of front inner folded walls 18. Further, on both sides of the inner layer wall 20, the frame portion 21 and the folded wall 22 in the flow direction, there is a complementary relationship with the mounting pieces 33 (described later) projecting inward in the flow direction from the pair of front inner folded walls 18. The base end recess 22C is formed.

<Rear wall, lid wall>
The rear wall 12 is continuously provided at the other end of the bottom wall 10 in the step direction via the first folding curve L1. The rear wall 12 is formed in a substantially rectangular shape having substantially the same size as the inner wall 20. The lid wall 13 as an example of the facing wall is continuously provided at the other end of the rear wall 12 in the step direction via the third folding curve L3 extending in the flow direction. The lid wall 13 is formed in a substantially rectangular shape having substantially the same size as the bottom wall 10.

<Outer wall>
The outer layer wall 14 is continuously provided at the other end of the lid wall 13 in the step direction via the fourth folding curve L4 extending in the flow direction. The outer layer wall 14 is formed in a substantially rectangular shape having substantially the same size as the inner layer wall 20.

A fan-shaped handle hole 14A is formed in a substantially central portion of the outer layer wall 14. Further, the outer layer wall 14 is formed with a pair of cutting lines 24 extending from both ends of the hand hole 14A in the flow direction (left-right direction) so as to be separated from each other toward the tip end side. The cutting line 24 is a zipper in which a plurality of cuts (lines obtained by cutting a corrugated cardboard sheet in the thickness direction) forming a substantially L-shape are arranged at predetermined intervals. The pair of cutting lines 24 have a function of cutting the outer layer wall 14 from one of the steps toward the other (from the lid wall 13 side toward the tip). The cutting line 24 is not limited to the zipper, and may be any line for cutting a corrugated cardboard sheet, such as a sewing machine blade line in which a plurality of cuts are arranged at predetermined intervals.

<Insert piece>
The insertion piece 15 is continuously provided at the tip end portion of the outer layer wall 14 via the insertion folding curve L11 extending in the flow direction. The insertion piece 15 extends from the intermediate portion in the flow direction of the outer layer wall 14 between the pair of cutting lines 24 toward the other in the step direction. The insertion piece 15 is formed in a substantially fan shape with a curved tip edge. A pair of insertion protrusions 15A protruding from the root portion on both sides in the flow direction are formed on both sides of the insertion piece 15 in the flow direction. The dimensions of the insertion piece 15 in the flow direction are set so that the insertion piece 15 can be inserted into the insertion port 30. The insertion piece 15 is formed with an engagement hole 15H along the insertion folding curve L11. The engaging hole 15H is a substantially trapezoidal opening that is long in the flow direction. The insertion piece 15 is formed in an annular shape by hollowing out the engagement hole 15H. Although the details will be described later, the pair of engaging pieces 32 arranged side by side are fitted into the engaging hole 15H so as to be flush with the insertion piece 15.

<Wall side>
The side wall 16 is continuously provided at the end of the bottom wall 10 in the flow direction via a fifth folding curve L5 extending in the step direction. The side wall 16 is formed in a substantially rectangular shape having substantially the same dimensions as the bottom wall 10 in the step direction. The dimension (extended dimension) of the side wall 16 in the flow direction is set to be substantially the same as the extended dimension of the inner layer wall 20.

<Inner flap>
The inner flap 17 is continuously provided at the tip of the side wall 16 in the flow direction via the sixth folding curve L6 extending in the step direction. The inner flap 17 is formed in a substantially rectangular shape having substantially the same dimensions as the side wall 16 in the step direction. The dimension (extended dimension) of the inner flap 17 in the flow direction is set shorter than the extended dimension of the side wall 16.

<Front inner folding wall>
The front inner folding wall 18 is continuously provided at one end (side end) in the step direction of the side wall 16 via the front vertical folding curve L7 extending in the flow direction. The front inner folded wall 18 is formed in a substantially rectangular shape having substantially the same dimensions as the side wall 16 in the flow direction. The dimension (extended dimension) in the step direction of the front inner folded wall 18 is slightly shorter than the extending dimension of the entire front wall 11, and is set to be substantially half of the dimension in the flow direction of the bottom wall 10.

The front inner folding wall 18 is provided with an engaging piece 32 and a mounting piece 33.

The engaging piece 32 projects from the tip of the inner edge of the front inner folding wall 18 toward the tip recess 22B of the folded wall 22. The engaging piece 32 is connected to the front inner folding wall 18 via the engaging folding curve L12. The engaging piece 32 is formed in a substantially trapezoidal shape in which one side of the base end side (the side of the front vertical folding curve L7) of the front inner folding wall 18 is inclined.

The mounting piece 33 is projected from the base end side of the inner edge portion of the front inner folding wall 18 toward the base end recess 22C of the front wall 11. In other words, the mounting piece 33 is formed so as to cut the end portion of the front wall 11 in the flow direction into a substantially trapezoidal shape and bite into the front wall 11. The mounting piece 33 is connected to the front inner folding wall 18 via the mounting folding curve L13 at a position away from the engaging piece 32 toward the proximal end side of the front inner folding wall 18. The mounting piece 33 is formed in a substantially trapezoidal shape that is longer in the step direction and the flow direction than the engaging piece 32 by inclining one side of the front inner folded wall 18 on the base end side.

A substantially rectangular (substantially U-shaped) cutting edge line E2 is formed along the mounting folding curve L13 at a substantially intermediate portion in the step direction of the mounting piece 33. In the portion surrounded by the cutting edge wire E2, a fitting convex portion 33A protruding toward the tip of the mounting piece 33 is formed.

<Rear inner folding wall>
The rear inner folding wall 19 is continuously provided at the other end of the side wall 16 in the flow direction via the rear vertical folding curve L8 extending in the flow direction. The rear inner folding wall 19 is formed in a substantially rectangular shape having substantially the same size as the front inner folding wall 18.

The first to sixth fold curves L1 to L6, the front vertical fold curve L7, the rear vertical fold curve L8, the auxiliary fold curve L10, the insertion fold curve L11, the engagement fold curve L12 and the mounted fold curve L13 (hereinafter, The "folded curve L1 to L6, etc.") is a general-purpose ruled line obtained by crushing a cardboard sheet linearly in the thickness direction from the back liner 9C side. These folding curves L1 to L6 and the like have a function of bending the corrugated cardboard sheet so that the back liner 9C faces inward. The folding curves L1 to L6 and the like are not limited to general-purpose ruled lines, and may be any line for bending a corrugated cardboard sheet, such as a lead ruled line in which a plurality of cuts are arranged at predetermined intervals on the general-purpose ruled line.

[Assembly and seal of packaging box]
Next, the assembly work and the sealing work of the packaging box 1 will be described with reference to FIGS. 1 to 8.
FIG. 3 is a perspective view illustrating the assembly work of the packaging box 1. FIG. 4 is a perspective view illustrating the assembly work of the packaging box 1 and the storage work of the contents M. FIG. 5 is a sectional view taken along line VV of FIG. FIG. 6 is a cross-sectional view illustrating the sealing operation of the packaging box 1. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 8 is a perspective view showing the front wall 11 of the packaging box 1, the insertion piece 15, and the like. The packaging box 1 may be manually assembled by an operator, or may be automatically or semi-automatically assembled by a box making machine. Here, as an example, a case where an operator assembles the packaging box 1 will be described.

The packaging box 1 is assembled by appropriately bending a blank 5 (see FIG. 2) with the back liner 9C facing upward. The operator bends the pair of engaging pieces 32 upward along the engaging folding curve L12, and bends the pair of mounting pieces 33 upward along the mounting folding curve L13.

Subsequently, as shown in FIG. 3, the operator bends the pair of side walls 16 along the fifth folding curve L5, and raises the pair of side walls 16 with respect to the bottom wall 10. In this state, the pair of side walls 16 extend from the left and right ends (first direction) of the bottom wall 10 toward the upper side (the lid wall 13 described later).

Further, the operator bends the pair of front and inner folding walls 18 inward along the front vertical folding curve L7, and arranges the pair of front and inner folding walls 18 in an upright posture on the first folding curve L1. In this state, the pair of front inner folding walls 18 extend from the front end portion (side end portion) of the side wall 16 along the front end portion (second direction end portion intersecting in the first direction) of the bottom wall 10. .. The tips of the pair of front inner folded walls 18 are abutted at substantially the center of the bottom wall 10 in the left-right direction, and the pair of engaging pieces 32 are also abutted at the substantially center of the bottom wall 10 in the left-right direction. Each engaging piece 32 and each mounting piece 33 are arranged in a state of extending from the lower end portion of the front inner folding wall 18 toward the inside of the bottom wall 10. Specifically, each engaging piece 32 and each mounting piece 33 overlap the bottom wall 10 in a posture substantially parallel to the bottom wall 10. Further, the fitting convex portion 33A that protrudes relatively downward by bending each mounting piece 33 fits into the fitting hole 10A of the bottom wall 10 (see FIG. 5).

Next, the operator bends the pair of rear inner folding walls 19 inward along the rear vertical folding curve L8, and arranges the pair of rear inner folding walls 19 in an upright posture on the first folding curve L1. In this state, the pair of rear inner folded walls 19 extend from the rear end of the side wall 16 along the rear end of the bottom wall 10, and the tip of the pair of rear inner folded walls 19 is in the left-right direction of the bottom wall 10. Butt at about the center. The pair of rear inner folding walls 19 may be bent after accommodating the contents M.

Next, as shown in FIGS. 4 and 5, the operator bends the inner layer wall 20 along the first folding curve L1 and raises the inner layer wall 20 with respect to the bottom wall 10. In this state, the inner layer wall 20 is extended from the front end portion (second direction end portion) of the bottom wall 10 toward the upper side (the lid wall 13 when the packaging box 1 is sealed), and is outside the front inner folding wall 18. It is layered on. At the lower end of the inner layer wall 20, a substantially trapezoidal insertion port 30 opens along the first folding curve L1.

Subsequently, the operator bends the frame portion 21 and the folded wall 22 inward along the second folding curve L2 at a substantially right angle. In this state, the frame portion 21 extends inward (rearward) from the tip end portion (upper end portion) of the inner layer wall 20. The folded wall 22 extends from the tip end portion of the frame portion 21 toward the bottom wall 10 (downward), and faces the inner layer wall 20 with the pair of front inner folded walls 18 interposed therebetween. When the folding wall 22 is bent, the operator bends the auxiliary piece 31 along the auxiliary folding curve L10 and brings the tip end portion of the auxiliary piece 31 into contact with the pair of engaging pieces 32 (see FIG. 6).

As shown in FIG. 5, the inner layer wall 20, the frame portion 21, and the folded wall 22 form a double wall and enclose the pair of front inner folded walls 18. Further, each fitting convex portion 22A of the folded wall 22 penetrates the extraction hole H2 opened by the fitting convex portion 33A coming out of the mounting piece 33, and fits into the fitting hole 10A of the bottom wall 10. .. Thereby, the double wall structure of the front wall 11 can be maintained.

As described above, the pair of side walls 16 and the front wall 11 are erected on the peripheral edge portion (excluding the rear end portion) of the bottom wall 10, and the packaging box 1 having an open upper surface is assembled.

Next, as shown in FIGS. 4 and 5, the operator places the two contents M on the bottom wall 10 from the top opening of the packaging box 1. The content M is housed in a state of being substantially in contact with the inner surface of each side wall 16 or the folded wall 22. That is, the content M is tightly housed inside the packaging box 1. Therefore, as shown in FIG. 5, the front end portion of each content M is placed on the mounting piece 33. Therefore, the front end portion of each content M is housed in the packaging box 1 in a state of being floated from the bottom wall 10 by the thickness of the mounting piece 33.

Next, the worker seals the packaging box 1. Specifically, the operator bends the rear wall 12 along the first folding curve L1 and raises the rear wall 12 with respect to the bottom wall 10. Further, the operator bends the pair of inner flaps 17 inward along the sixth folding curve L6, and bends the lid wall 13 forward along the third folding curve L3. In this state, the lid wall 13 is arranged with the storage space for the contents M sandwiched between the lid wall 13 and the bottom wall 10, and the upper surface opening of the packaging box 1 is substantially closed (see FIGS. 1 and 6).

Next, as shown in FIG. 6, the operator bends the outer layer wall 14 downward along the fourth folding curve L4, and bends the insertion piece 15 backward along the insertion folding curve L11. Then, the worker inserts the insertion piece 15 into the insertion port 30 of the inner layer wall 20. The insertion piece 15 is inserted into the insertion port 30 in a posture along the bottom wall 10. Specifically, the insertion piece 15 is pushed between the bottom wall 10 and the pair of engaging pieces 32 while slightly pushing up the pair of front inner folding walls 18. As described above, since the front end portion of the content M is placed on the mounting piece 33 and forms a slight gap with the bottom wall 10, the insertion piece 15 interferes with the content M. It is plugged in without doing anything.

As shown in FIGS. 7 and 8, when the insertion piece 15 is inserted into the insertion port 30 up to the root portion, the outer layer wall 14 faces substantially parallel to the inner layer wall 20 and is overlapped on the outside of the inner layer wall 20. .. Further, in this state, the pair of insertion protrusions 15A of the insertion piece 15 overcomes the pair of hooking portions 30A of the insertion port 30 and engages with the pair of hooking portions 30A inside the front wall 11. (Not shown).

Further, as shown in FIGS. 7 and 8, the pair of engaging pieces 32 relatively get over the tip portion of the insertion piece 15 and fit into the engaging hole 15H. That is, a pair of engaging pieces 32 are fitted in the engaging hole 15H of the insertion piece 15 in a posture along the bottom wall 10, and the insertion piece 15 and the pair of engagement pieces 32 are on the same plane. Be placed. The pair of engaging pieces 32 are fitted to the engaging hole 15H with substantially no gap, but the present invention is not limited to this, and the pair of engaging pieces 32 are fitted with a slight gap to the engaging hole 15H. May be good.

Further, the auxiliary piece 31 is in a posture of being inclined backward from the upper side to the lower side, and its tip portion is brought into contact with the upper surface of the pair of engaging pieces 32. The auxiliary piece 31 has a function of pressing a pair of engaging pieces 32 fitted in the engaging hole 15H of the insertion piece 15.

As a result, the packaging box 1 is sealed (see FIG. 1).

[Opening the packaging box]
Next, the opening operation of the packaging box 1 will be described with reference to FIGS. 1 and 9. FIG. 9 is a perspective view showing a state in which the packaging box 1 is opened.

The packaging box 1 is opened by cutting the outer layer wall 14 along a pair of cutting lines 24. Specifically, the operator puts a hand (finger) on the handle hole 14A (see FIG. 1) of the outer layer wall 14 and pulls down the outer layer wall 14 between the pair of cutting lines 24 toward the front. Then, as shown in FIG. 9, since the outer layer wall 14 is cut along the pair of cutting lines 24, the insertion piece 15 is separated from the outer layer wall 14.

As a result, the packaging box 1 is in an opened state. As a result, the lid wall 13 can be opened, and the content M can be taken out from the upper surface opening.

According to the packaging box 1 according to the present embodiment described above, since the insertion piece 15 is inserted into the insertion port 30 in a posture along the bottom wall 10, the work of folding back the insertion piece 15 is omitted. The insertion piece 15 can be easily inserted into the insertion port 30.

By the way, consider a case where the engaging piece 32 is inserted into the engaging hole 15H of the insertion piece 15 from above with the engaging piece 32 in a posture orthogonal to the bottom wall 10 (not shown). In this case, when a pulling force is applied to the insertion piece 15, shear stress acts on the tip of the engagement piece 32, and the tip of the engagement piece 32 is easily bent. The bent engaging piece 32 cannot maintain the state of being inserted into the engaging hole 15H, and the insertion piece 15 is easily pulled out. On the other hand, in the packaging box 1 according to the present embodiment, the engaging piece 32 is abbreviated as the bottom wall 10 in a state where the insertion piece 15 is inserted into the insertion port 30 so as to be substantially parallel to the bottom wall 10. It is configured to fit into the engagement hole 15H of the insertion piece 15 in a parallel posture. According to this configuration, since the fitting portion between the insertion piece 15 and the engagement piece 32 extends in parallel with the pull-out direction of the insertion piece 15, the force for pulling out the insertion piece 15 is ensured by the engagement piece 32. Can be received. As a result, it is possible to prevent the insertion piece 15 from coming off from the insertion port 30. As a result, even if a large pulling force is applied to the insertion piece 15, the extraction of the insertion piece 15 can be restricted.

Further, in the packaging box 1 according to the present embodiment, the inner layer wall 20, the frame portion 21, and the folded wall 22 form a double wall to wrap the pair of front inner folded walls 18, and the auxiliary piece 31 of the folded wall 22 is an insertion piece. It is configured to abut on the engaging piece 32 fitted in the engaging hole 15H of 15. According to this configuration, since the auxiliary piece 31 of the folded wall 22 presses the engaging piece 32 fitted in the engaging hole 15H of the insertion piece 15, the engaging piece 32 floats up and separates from the engaging hole 15H. Can be suppressed.

Further, in the packaging box 1 according to the present embodiment, the mounting piece 33 extends inside the packaging box 1 and is arranged between the bottom wall 10 and the contents M. According to this configuration, since a gap corresponding to the thickness of the mounting piece 33 is formed between the content M and the bottom wall 10, the insertion piece 15 is inserted into the insertion port 30 in the process of inserting the insertion piece 15 into the insertion port 30. Can be prevented from interfering with the content M. As a result, the work of inserting the insertion piece 15 into the insertion port 30 can be smoothly performed.

Further, the packaging box 1 according to the present embodiment is opened by cutting the outer layer wall 14 along the cutting line 24. According to this configuration, since the package box 1 once opened cannot be returned to the sealed state again, it is possible to confirm whether or not the package box 1 has been opened, and the contents M contained in the package box 1 can be extracted. Various frauds such as modification to the content M can be suppressed.

In the packaging box 1 according to the present embodiment, the insertion piece 15, the insertion port 30, the auxiliary piece 31, the engagement piece 32, etc. (hereinafter, also referred to as “insertion piece 15 and the like”) are the outer layer wall 14. Although it was provided substantially in the center of the left-right direction, the present invention is not limited to this. For example, the insertion piece 15 and the like may be provided at a position shifted to the left or right side of the outer layer wall 14.

Further, in the packaging box 1 according to the present embodiment, the insertion pieces 15 and the like are provided in one place (one set), but the present invention is not limited to this. As shown in FIG. 10, for example, when the packaging box 2 (blank 6) according to the modified example is formed long in the left-right direction, the insertion pieces 15 and the like may be provided at two places (two sets). .. That is, depending on the size and shape of the packaging boxes 1 and 2, the insertion pieces 15 and the like can be provided at two or more places (two sets or more). In the blank 6 of the packaging box 2 shown in FIG. 10, the mounting piece 33 is omitted, and one engaging piece 32 of one front inner folded wall 18 is fitted in the engaging hole 15H. ..

Further, in the packaging box 1 according to the present embodiment, the rear inner folding wall 19 is continuously provided at the side end portion of the side wall 16, but the present invention is not limited to this. As shown in FIG. 11, for example, as a packaging box 3 (blank 7) according to another modification, a pair of rear inner folding walls 29 are continuously provided at both ends of the rear wall 12 in the left-right direction via a rear vertical folding curve L9. It may have been done. In this case, the pair of rear inner folding walls 29 may be adhered to the inner surface of the pair of side walls 16.

Further, in the packaging box 1 according to the present embodiment (including the packaging boxes 2 and 3 according to the modified example, the same applies hereinafter), the insertion piece 15 is formed in a substantially annular shape with the engagement hole 15H opened. , The present invention is not limited to this. As shown in FIG. 12, for example, as the packaging box 4 (blank 8) according to another modification, the insertion piece 35 is formed in a substantially U-shape (or a substantially C-shape) in which a part of the ring is divided. May be.

Further, in the packaging box 1 according to the present embodiment, the insertion piece 15 is formed in a substantially fan shape, but the present invention is not limited to this, and the insertion piece 15 has any shape as long as it can be easily inserted into the insertion port 30. May be. Further, the engaging hole 15H and the engaging piece 32 of the insertion piece 15 are formed in a substantially trapezoidal shape, but the shape is not limited to this, and any shape may be used as long as it can be easily fitted to each other.

Further, in the packaging box 1 according to the present embodiment, the tips of the pair of front inner folding walls 18 (pair of engaging pieces 32) are butted against each other, but the present invention is not limited to this, and they may be separated from each other. Further, one engaging hole 15H is opened in the insertion piece 15, and a pair of engaging pieces 32 are fitted in one engaging hole 15H, but the present invention is not limited to this. For example, the insertion piece 15 may have two engaging holes into which the pair of engaging pieces 32 are separately fitted (not shown).

Further, in the packaging box 1 according to the present embodiment, the pair of front inner folding walls 18 is provided with the pair of engaging pieces 32 and the pair of mounting pieces 33, but the present invention is not limited thereto. For example, the engaging piece 32 and the mounting piece 33 may be provided on only one of the pair of front inner folding walls 18 (not shown). Further, for example, one of the pair of front inner folding walls 18 may be omitted, and only one front inner folding wall 18 (one engaging piece 32 and one mounting piece 33) may be provided (shown). figure).

Further, in the packaging box 1 according to the present embodiment, the front wall 11 is a double wall, but the present invention is not limited to this. For example, the frame portion 21 and the folded wall 22 may be omitted, and the front wall 11 may be composed of the inner layer wall 20 (not shown). In this case, the auxiliary piece 31 may be omitted. Further, in this case, the front inner folded wall 18 may be adhered to the inner surface of the inner layer wall 20.

Further, although the packaging box 1 according to the present embodiment includes the cutting line 24, the auxiliary piece 31, and the mounting piece 33, all or part of these may be omitted.

Further, in the packaging box 1 according to the present embodiment, the inner layer wall 20 is connected to the bottom wall 10 and the outer layer wall 14 is connected to the lid wall 13, but the present invention is not limited thereto. For example, the inner wall 20 may be connected to the lid wall 13 and the outer wall 14 may be connected to the bottom wall 10 (not shown). Further, for example, the top surface or the bottom surface of the packaging box may be composed of the inner layer wall 20 and the outer layer wall 14, and the side surfaces may be composed of the foundation wall and the facing wall (not shown).

Further, the packaging box 1 according to the present embodiment is formed in a substantially rectangular parallelepiped shape, but the present invention is not limited to this, and each wall is designed to form another polyhedron (for example, a triangular columnar column, an octagonal columnar column, etc.). May be (not shown).

Further, the packaging box 1 according to the present embodiment is formed of a corrugated cardboard sheet made of paper, but is not limited to this, and may be formed of, for example, thick paper or a resin plate.

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.

1-4 Packaging box 10 Bottom wall (foundation wall)
13 Cover wall (opposing wall)
14 Outer layer wall 15,35 Insert piece 15H Engagement hole 16 Side wall 18 Front inner folding wall (inner folding wall)
20 Inner layer wall 21 Frame part 22 Folded wall 24 Cutting line 30 Outlet 31 Auxiliary piece 32 Engagement piece 33 Placement piece M Contents

Claims (4)

Foundation wall (10) and
An facing wall (13) arranged with a storage space for the contents (M) sandwiched between the foundation wall and the foundation wall.
A side wall (16) extending from the end of the foundation wall in the first direction toward the facing wall, and
An inner folded wall (18) extending from the side end of the side wall along the end in the second direction intersecting the first direction of the foundation wall.
Includes an insertion port (30) extending from a second end of the foundation wall toward the facing wall, stacked on the outside of the inner folded wall, and formed along a boundary with the foundation wall. Inner wall (20) and
An outer wall (14) that is connected to the end of the facing wall in the second direction and is overlapped on the outside of the inner wall.
An insertion piece (15) that is connected to the tip of the outer layer wall and is inserted into the insertion port in a posture along the foundation wall.
A frame portion (21) extending inward from the tip portion of the inner layer wall and
A folded wall (22) extending from the tip of the frame portion toward the foundation wall and facing the inner layer wall across the inner folded wall is provided.
The inner folded wall is provided with an engaging piece (32) extending inward.
The insertion piece is formed with an engagement hole (15H) into which the engagement piece fits in a posture along the foundation wall.
An auxiliary piece (31) for pressing the engaging piece fitted in the engaging hole of the insertion piece is provided at the tip of the folded wall.
The auxiliary piece is characterized in that it is inclined from the side of the facing wall toward the side of the foundation wall in a direction away from the folded wall, and its tip portion is in contact with the engaging piece. Packaging box. The inner folded wall is characterized in that a mounting piece (33) extending inward at a position away from the engaging piece and arranged between the foundation wall and the contents is provided. The packaging box according to claim 1 . A fitting hole (10A) is formed in the foundation wall along the boundary with the inner layer wall.
A first fitting convex portion (22A) is projected from the tip of the folded wall.
A rectangular cutting edge line (E2) is formed on the above-mentioned placing piece along the boundary with the inner folded wall.
The portion surrounded by the cutting edge line is a second fitting convex portion that protrudes relatively toward the foundation wall by bending the above-mentioned piece and fits into the fitting hole of the foundation wall. (33A) is formed and
The first fitting convex portion penetrates the extraction hole (H2) opened by the second fitting convex portion coming out of the above-mentioned placement piece, and fits into the fitting hole of the foundation wall. The packaging box according to claim 2, wherein the packaging box is characterized by the above. The packaging box according to any one of claims 1 to 3, wherein a cutting line (24) for separating the insertion piece from the outer layer wall is formed on the outer layer wall.

Images