JP2021116066A - Packing box - Google Patents

Abstract

To provide a packing box that ensures ventilation while maintaining sealability and whose strength does not easily decrease.SOLUTION: A packing box 1 includes a trunk portion 10 formed by bonding a bonding piece 15 provided on one end portion of a peripheral wall with an opposing portion 11A provided on another end portion of the peripheral wall, and a lid portion disposed at an opening portion of the trunk portion 10. The bonding piece 15 is attached to the opposing portion 11A from an outer surface side of the other end portion of the peripheral wall. The opposing portion 11A is provided with a penetration hole 16 penetrating in a thickness direction of the peripheral wall. The bonding piece 15 is provided with a recess portion 18 that is opened with a half cut line L18 to communicate with the penetration hole 16 and exposes a space portion 19 formed by a flute through an opening. The penetration hole 16 is covered with a sheet 17 having air permeability. The space portion 19 is opened at an end portion of the bonding piece 15.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging box.

Conventionally, as a corrugated cardboard packaging box, a box having a through hole in the peripheral wall is known (see, for example, Patent Document 1).
The packaging box of Patent Document 1 can ensure air permeability inside and outside the box through through holes.

Japanese Unexamined Patent Publication No. 2019-108163

Since the air inside and outside the box freely flows through the through hole in the packaging box of Patent Document 1 described above, the sealing property could not be maintained. Further, since the air inside and outside the box freely flows through the through hole, it is difficult to control the gas inside the box to maintain the freshness of the packaged object. Further, since the structure has a through hole in the peripheral wall, the strength of the packaging box tends to decrease.

An object of the present invention is to solve the above-mentioned problems, to secure air permeability while maintaining hermeticity, and to provide a packaging box whose strength does not easily decrease.

In order to solve the above problems, the present invention relates to a packaging box having a body portion formed by joining a joining piece provided at one end of a peripheral wall to an opposing portion provided at the other end of the peripheral wall. , A corrugated cardboard packaging box including a lid portion arranged in the opening of the body portion. The joint piece is attached to the facing portion from the outer surface side of the other end portion of the peripheral wall. The facing portion is provided with a through hole penetrating in the thickness direction of the peripheral wall. The joint piece is provided with a recess that is opened by a half-cut line and communicates with the through hole to expose a space formed by a flute through the opening. The through hole is covered with a sheet having a gas permeability. The space portion is open to the end portion of the joint piece.

Further, the present invention is a packaging box, and a body portion formed by joining a joining piece provided at one end of the peripheral wall to an opposing portion provided at the other end of the peripheral wall, and the body portion. It is a corrugated cardboard packaging box provided with a lid portion arranged in the opening of the. The joint piece is attached to the facing portion from the inner surface side of the other end portion of the peripheral wall. The joint piece is provided with a through hole penetrating in the thickness direction of the joint piece. The facing portion is provided with a recess that is opened by a half-cut line and communicates with the through hole to expose a space portion formed by a flute through the opening. The through hole is covered with a sheet having a gas permeability, and the space portion is opened at the end portion of the facing portion of the peripheral wall.

In the packaging box of the present invention, the through hole and the recess communicate with each other, and the space formed by the flute and the recess communicate with each other. Therefore, the gas in the packaging box flows from the through hole to the recess through the sheet. , It is discharged from the recess to the outside of the packaging box through the space. On the contrary, the gas outside the packaging box flows from the recess to the through hole through the space and is taken into the packaging box through the sheet. Therefore, ventilation can be ensured while maintaining the hermeticity of the packaging box.
Further, with the sheet having gas permeability, for example, when the packaged object is fruits and vegetables, carbon dioxide, ethylene gas and the like can be released to the outside of the box while taking in oxygen necessary for breathing of fruits and vegetables. As a result, the concentration of gas in the box can be controlled to the optimum state for fruits and vegetables.
Further, since the strength of the packaging box is higher in the portion where the joint pieces are joined than in the other portions, the strength is unlikely to decrease even if the through holes and the recesses are provided.

Further, since the recess is arranged on the outside of the through hole, it is possible to prevent the through hole and the sheet from being exposed on the outer surface of the packaging box. As a result, the strength of the packaging box can be suitably secured while preventing defects such as sheet breakage.

Further, the direction of the eyes of the peripheral wall and the joint piece is preferably the vertical direction. With this configuration, the openings of the space that communicates with the recess can be arranged at two locations above and below the joint piece, so that ventilation can be ensured while maintaining the tightness of the box.

Further, the lid portion is composed of a plurality of flaps connected to the body portion, and a slit portion is formed between the adjacent flaps from the tip end side to the base end side. It is preferable that it is cut. In this case, it is preferable that a cutting line continuous with the slit portion is formed on the base end portion side of the flap.

With this configuration, when the adjacent flaps are closed when the packaging box is closed, the adjacent portions are bent so as to overlap each other at the cutting line, so that it is difficult for a gap to be formed at the base ends of the flaps. Therefore, ventilation can be suitably ensured while maintaining the tightness of the box.

In the present invention, it is possible to obtain a packaging box that secures ventilation while maintaining hermeticity, and in addition, its strength does not easily decrease.

It is a perspective view which looked at the packaging box which concerns on 1st Embodiment of this invention from the front upper left. It is a figure which showed the blank sheet of the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which showed the circumference of the through hole and the circumference of the recess of the packaging box according to the first embodiment of the present invention. It is an operation explanatory drawing of the packaging box which concerns on 1st Embodiment of this invention. It is explanatory drawing which showed the gas flow of the packaging box which concerns on 1st Embodiment of this invention in the cross section along the IV-IV line of FIG. 4A. It is a perspective view which looked at the packaging box which concerns on 2nd Embodiment of this invention from the front upper left. It is a figure which showed the blank sheet of the packaging box which concerns on 2nd Embodiment of this invention. It is a perspective view which showed the circumference of the through hole and the circumference of the recess of the packaging box according to the second embodiment of the present invention. It is an operation explanatory drawing of the packaging box which concerns on 2nd Embodiment of this invention. It is explanatory drawing which showed the gas flow of the packaging box which concerns on 2nd Embodiment of this invention in the cross section along the line VIII-VIII of FIG. It is a perspective view which looked at the packaging box which concerns on 3rd Embodiment of this invention from the front upper left. It is a figure which showed the blank sheet of the packaging box which concerns on 3rd Embodiment of this invention. It is a perspective view which showed the circumference of the through hole and the circumference of the recess of the packaging box according to the third embodiment of the present invention. It is an operation explanatory drawing of the packaging box which concerns on 3rd Embodiment of this invention. It is explanatory drawing which showed the gas flow of the packaging box which concerns on 3rd Embodiment of this invention in the cross section along the XII-XII line of FIG. 12A.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, the front-back, left-right, up-down directions are set for convenience in explaining the packaging box of each embodiment, and do not limit the configuration of the packaging box of the present invention. In each embodiment, the same parts are designated by the same reference numerals and redundant description will be omitted.

(First Embodiment)
As shown in FIG. 1, the packaging box 1 is a type A corrugated cardboard box, and has a square tubular body portion 10, a top plate (cover portion) 20 connected to the upper edge portion of the body portion 10, and a body. A bottom plate (lid portion) 30 connected to the lower edge portion of the portion 10 is provided. As will be described later, the packaging box 1 is provided with a ventilation means T that communicates the inside and outside of the packaging box 1 with the joining piece 15 and the facing portion 11A of the front end plate 11 to which the joining piece 15 is joined.

As shown in FIG. 2, the packaging box 1 is formed by folding a blank sheet S obtained by cutting out a corrugated cardboard sheet into mountain folds or valley folds at each ruled line. The blank sheet S shown in FIG. 2 is arranged so that the inner surface side can be seen. In the blank sheet S, the corrugated cardboard has vertical stitches.
Each ruled line (folded line) of the blank sheet S is a linear groove (ruled line) formed by pushing the surface of the blank sheet S. A notch may be formed in the ruled line. In this way, the blank sheet S can be easily bent at the ruled line.

The body portion 10 is composed of four continuous peripheral walls. The peripheral wall has a pair of front and rear end plates 11 and 12 and a pair of left and right side plates 13 and 14. The front end plate 11, the rear end plate 12, the left side plate 13, and the right side plate 14 each have a quadrangular shape.
A left side plate 13 is continuously provided on the left edge portion of the front end plate 11 via a ruled line. Further, a trailing end plate 12 is continuously provided at the trailing edge of the left side plate 13 via a ruled line. Further, a right side plate 14 is continuously provided on the right edge portion of the rear end plate 12 via a ruled line. A vertically long strip-shaped joint piece 15 is continuously provided on the leading edge portion of the right side plate 14 via a ruled line. The joining piece 15 is joined to the outer surface of the front end plate 11 by an adhesive means such as hot melt.

Then, when the blank sheet S (see FIG. 2) is bent along each ruled line, a square tubular body portion 10 is formed by the front end plate 11, the rear end plate 12, the left side plate 13, and the right side plate 14.

As described above, the joining piece 15 is joined to the right edge of the outer surface of the front end plate 11. As a result, the right edge portion of the outer surface of the front end plate 11 is covered with the joint piece 15 over substantially the entire vertical direction. As shown in FIGS. 2 and 3, a through hole 16 constituting the ventilation means T is formed in the facing portion 11A (region to which the joining piece 15 is adhered) of the front end plate 11 facing the joining piece 15. .. The through hole 16 is a hole that penetrates the front end plate 11 in the front-rear direction (thickness direction of the front end plate 11). The through hole 16 has a vertically long substantially quadrangular shape when viewed from the front. The through hole 16 is located above the facing portion 11A.

As shown in FIGS. 2 and 3, the through hole 16 is covered with a substantially square sheet 17. The sheet 17 is a transparent film having gas permeability. For example, the sheet 17 is attached around the hole edge by an adhesive applied around the hole edge of the inner surface 11a of the front end plate 11, and the entire through hole 16 is formed at the front end. It covers from the inside of the plate 11. The sheet 17 is provided with a large number of fine ventilation holes (not shown), and allows gas to pass through. As a result, the gas in the packaging box 1 is discharged into the through hole 16 through the sheet 17, and the gas in the through hole 16 is taken into the packaging box 1 through the sheet 17. The number and size of the fine ventilation holes are appropriately set in consideration of the type and weight of the object to be contained in the packaging box 1, the gas flow environment in the packaging box 1, and the like. For example, when the content is fruits and vegetables, the number and size of vents are set so that oxygen necessary for continuous breathing of fruits and vegetables can be taken in and carbon dioxide and ethylene gas can be discharged in a well-balanced manner. do.

As shown in FIG. 3, two upper and lower recesses 18 and 18 constituting the ventilation means T are formed on the inner surface 15a of the joint piece 15 at positions corresponding to the through holes 16 of the facing portion 11A. Each recess 18 has a horizontally long substantially square shape. Each recess 18 is formed by pressing horizontally long substantially quadrangular regions R1 and R1 partitioned by the half-cut line L18 from the inner surface side to the outer surface side. As a result, each recess 18 has a structure that opens only on the inner surface 15a of the joint piece 15 and does not open on the outer surface of the joint piece 15.
Since each recess 18 is partitioned by the half-cut line L18, a cross section along the notch of the half-cut line L18 is exposed in each recess 18 after the pressing process. In the present embodiment, since the corrugated cardboard has vertical stitches, a plurality of space portions 19 partitioned by flutes are exposed in the upper cross-sectional portion and the lower cross-sectional portion of each recess 18. Each space portion 19 is open to the upper end portion and the lower end portion of the joint piece 15 (in FIG. 3, only the space portion 19 opened to the upper end portion side is shown).

As shown in FIG. 4A, each recess 18 is arranged so as to face the through hole 16 on the facing portion 11A side by joining the joining piece 15 to the facing portion 11A of the front end plate 11. As a result, the inside of each recess 18 and the through hole 16 communicate with each other, and the inside of the packaging box 1 communicates with the through hole 16 and each recess 18 via the sheet 17, and the space between the recess 18 and the flute. It is in a state of communicating with the outside of the packaging box 1 via 19.

Next, the top plate 20 and the bottom plate 30 will be described. As shown in FIG. 1, the top plate 20 closes the upper opening of the body portion 10. The top plate 20 includes a pair of front and rear upper inner flaps 21 and 21 that are connected to the upper edges of the front end plate 11 and the rear end plate 12. Further, on the outer surface (upper surface) of the top plate 20, a pair of left and right upper outer flaps 22 and 22 connected to the upper edges of the left side plate 13 and the right side plate 14 are overlapped.

The upper inner flap 21 on the front side is a quadrangular flat plate, and extends rearward from the upper edge portion of the front end plate 11. A part of the front side of the upper opening of the body portion 10 is closed by the upper inner flap 21 on the front side.
The upper inner flap 21 on the rear side is a quadrangular flat plate and extends forward from the upper edge portion of the rear end plate 12. A part of the rear side of the upper opening of the body portion 10 is closed by the upper inner flap 21 on the rear side.

The upper outer flap 22 on the left side is a quadrangular flat plate, and extends from the upper edge portion of the left side plate 13 toward the right. The left upper outer flap 22 closes the left half of the upper opening of the body 10.
The upper outer flap 22 on the right side is a quadrangular flat plate, and extends from the upper edge portion of the right side plate 14 toward the left. The right upper outer flap 22 closes the right half of the upper opening of the body 10.
The edge portions of the left and right upper outer flaps 22 and 22 are abutted at the central portion in the left-right direction, and are joined by an adhesive tape (not shown) as a sealing tape.

As shown in FIG. 1, the bottom plate 30 closes the lower opening of the body portion 10. The bottom plate 30 includes a pair of front and rear lower inner flaps 31 and 31 connected to the lower edges of the front end plate 11 and the rear end plate 12. Further, on the outer surface (lower surface) of the bottom plate 30, a pair of left and right lower outer flaps 32, 32 connected to the lower edges of the left side plate 13 and the right side plate 14 are overlapped.

The lower inner flap 31 on the front side is a quadrangular flat plate, and extends rearward from the lower edge portion of the front end plate 11. A part of the front side of the lower opening of the body portion 10 is closed by the lower inner flap 31 on the front side.
The lower inner flap 31 on the rear side is a quadrangular flat plate and extends forward from the lower edge portion of the rear end plate 12. A part of the rear side of the lower opening of the body portion 10 is closed by the lower inner flap 31 on the rear side.

The lower outer flap 32 on the left side is a quadrangular flat plate, and extends from the lower edge portion of the left side plate 13 toward the right. The left lower outer flap 32 closes the left half of the lower opening of the fuselage 10.
The lower outer flap 32 on the right side is a quadrangular flat plate and extends from the lower edge portion of the right side plate 14 toward the left. The lower outer flap 32 on the right side closes the right half of the lower opening of the body 10.
The edge portions of the left and right lower outer flaps 32, 32 are abutted at the central portion in the left-right direction, and are joined by an adhesive tape (not shown) as a sealing tape.

As shown in FIG. 2, a slit portion 23 cut from the tip end side to the base end portion side of the flap is formed between the upper inner flap 21 and the upper outer flap 22. Further, except for the slit portion 23 formed between the upper inner flap 21 of the front end plate 11 and the upper outer flap 22 of the right side plate 14, the slit portion 23 is between the upper inner flap 21 and the upper outer flap 22. A continuous cutting line 24 is formed in. Further, between the upper inner flap 21 of the front end plate 11 and the upper outer flap 22 of the right side plate 14, a bent piece 25 continuous with the slit portion 23 is provided so as to project.

The slit portion 23 forms a gap between the upper inner flap 21 and the upper outer flap 22 to separate them at predetermined intervals. On the other hand, since the cutting line 24 is continuously formed in the slit portion 23, when the adjacent flaps are closed, the base end portions of the upper inner flap 21 and the upper outer flap 22 are close to each other in the vertical direction. Acts to overlap (overlap). Further, the bent piece 25 is positioned so as to be folded between the flaps when the adjacent flaps are closed.

Similarly, a slit portion 23, a cutting line 24, and a bent piece 25 are formed between the lower inner flap 31 and the lower outer flap 32. The slit portion 23 forms a gap between the lower inner flap 31 and the lower outer flap 32 to separate them at predetermined intervals. Further, the cutting line 24 acts so that when the adjacent flaps are closed, the base ends of the lower inner flap 31 and the lower outer flap 32 overlap each other in the vertical direction in close proximity to each other. do. Further, the bent piece 25 is positioned so as to be folded between the flaps when the adjacent flaps are closed.

In the packaging box 1 of the present embodiment, when assembling the body portion 10 from the blank sheet S, the blank sheet S (see FIG. 2) is bent at each ruled line, and the joint piece 15 is attached to the facing portion 11A on the outer surface of the front end plate 11. Is joined by an adhesive means such as hot melt. When the joining piece 15 is joined to the facing portion 11A, as shown in FIG. 4A, the through hole 16 of the facing portion 11A and each recess 18 of the joining piece 15 are in a state of overlapping in the front-rear direction, and they communicate with each other.

After that, the lower inner flap 31 and the lower outer flap 32 are bent to close the bottom plate 30. Then, the base ends of the adjacent lower inner flaps 31 and the lower outer flaps 32 overlap each other in the vertical direction via the cutting line 24, and the base ends are closed without a gap. Further, the bent piece 25 is folded between the flaps, and the base end portions are closed without a gap.

After closing the bottom plate 30, the packaged box 1 contains an object to be contained such as fruits and vegetables. Then, the upper inner flap 21 and the upper outer flap 22 are bent to close the top plate 20. Also in this case, the base ends of the adjacent upper inner flaps 21 and the upper outer flaps 22 overlap each other in the vertical direction via the cutting line 24, and the base ends are closed without gaps. Further, the bent piece 25 is folded between the flaps, and the base end portions are closed without a gap.

Next, the operation of the ventilation means T will be described. In the packaging box 1, since the through hole 16 of the facing portion 11A and each recess 18 of the joint piece 15 communicate with each other, carbon dioxide in the packaging box 1 and the packaging box are as shown in FIGS. 4A and 4B. The gas such as ethylene gas generated in 1 flows into the through hole 16 from the inside of the packaging box 1 through the sheet 17. The gas that has flowed into the through hole 16 flows into each recess 18 from the through hole 16, and flows into the space 19 from each recess 18.

After that, the gas flowing into the space portion 19 flows through the space portion 19 toward the upper end portion and the lower end portion of the joint piece 15, and the outside of the joint piece 15 (of the packaging box 1) from each opening of the upper end portion and the lower end portion. It is discharged to the outside).

Also, on the contrary. Gas such as air outside the packaging box 1 flows into each recess 18 through a space 19 that opens at the upper end and the lower end of the joint piece 15. Then, the gas such as air that has flowed into each recess 18 flows into the through hole 16 from each recess 18 and is taken into the packaging box 1 through the sheet 17.
By the aeration means T as described above, oxygen necessary for the continuation of respiration of fruits and vegetables is taken in, carbon dioxide and ethylene gas are discharged in a well-balanced manner, and the gas in the packaging box 1 is in the optimum state for fruits and vegetables. Be controlled.

In the packaging box 1 of the present embodiment described above, ventilation can be ensured while maintaining the sealing property of the packaging box 1 by the ventilation means T of the packaging box 1.
Further, with the sheet 17 having gas permeability, for example, when the packaged object is fruits and vegetables, carbon dioxide, ethylene gas and the like can be released to the outside of the box while taking in oxygen necessary for breathing of fruits and vegetables. .. Thereby, the concentration of the gas in the packaging box 1 can be controlled to the optimum state for fruits and vegetables.

Further, since the strength of the packaging box 1 is higher in the portion where the joining piece 15 is joined than in the other portions, it is suitable to provide the through holes 16 and the recesses 18 and 18. Therefore, even if the through holes 16 and the recesses 18 and 18 are provided, the packaging box 1 whose strength is unlikely to decrease can be obtained.

Further, the through hole 16 and the sheet 17 provided in the facing portion 11A can be covered from the outside with the joining piece 15. As a result, it is possible to prevent the through hole 16 and the sheet 17 from being exposed to the outside of the packaging box 1 while ensuring air permeability. Therefore, the strength of the packaging box 1 can be suitably secured while preventing problems such as breakage of the sheet 17.

Further, since the direction of the eyes of the joining piece 15 is the vertical direction, the openings of the space portions 19 communicating with the recesses 18 and 18 can be arranged at two places above and below the joining piece 15. In this way, the risk that the space 19 (ventilation path) is blocked is reduced.

Further, since the slit portion 23 is formed between the adjacent upper inner flaps 21 and the upper outer flaps 22, the flaps can be easily folded and overlapped with each other. Further, since the cutting line 24 is continuously formed in the slit portion 23. When the adjacent flaps are closed when the top plate 20 or the like is closed, the adjacent flaps are bent so as to overlap each other at the cutting line 24. As a result, it is difficult for a gap to be formed at the base end portion between the flaps. Therefore, it is possible to suitably secure ventilation while maintaining the hermeticity of the packaging box 1.

(Second Embodiment)
The packaging box of the second embodiment will be described with reference to FIGS. 5 to 8B. The difference between the present embodiment and the first embodiment is that, as shown in FIGS. It is in.

As shown in FIG. 6, the packaging box 1A is formed by folding a blank sheet S1 obtained by cutting out a corrugated cardboard sheet into mountain folds or valley folds at each ruled line. The blank sheet S1 shown in FIG. 6 is arranged so that the inner surface side can be seen. In the blank sheet S1, the corrugated cardboard has horizontal stitches.

The through hole 16 constituting the ventilation means T1 is located substantially at the center in the vertical direction of the facing portion 11A of the front end plate 11. Similarly, a sheet 17 is attached to the through hole 16.

Also in this embodiment, the joining piece 15A is joined to the facing portion 11A on the outer surface of the front end plate 11 by an adhesive means such as hot melt. As shown in FIG. 7, a recess 18A forming the ventilation means T1 is formed on the inner surface 15a of the joint piece 15A at a position corresponding to the through hole 16 of the facing portion 11A. The recess 18A has a vertically long substantially quadrangular shape corresponding to the through hole 16 of the front end plate 11. The recess 18A is formed by pressing a vertically long substantially quadrangular region R1A partitioned by the half-cut line L18A from the inner surface side to the outer surface side. As a result, the recess 18A has a structure that opens only on the inner surface 15a of the joining piece 15A and does not open on the outer surface of the joining piece 15A.
Since the recess 18A is partitioned by the half-cut line L18A, a cross section along the notch of the half-cut line L18A is exposed in the recess 18A after the pressing process. In the present embodiment, since the corrugated cardboard is horizontal, a plurality of space portions 19A partitioned by flutes are exposed in the left cross-sectional portion and the right cross-sectional portion of the recess 18A. Each space portion 19A is open to the left end portion 15A1 of the joining piece 15A.

As shown in FIG. 8A, the recess 18A is arranged so as to face the through hole 16 on the facing portion 11A side by joining the joining piece 15A to the facing portion 11A of the front end plate 11. As a result, the inside of the recess 18A and the through hole 16 are in communication with each other, and the inside of the packaging box 1A communicates with the through hole 16 and the recess 18A via the sheet 17 and is communicated from the recess 18A through the flute space 19A. The product is in a state of communicating with the outside of the packaging box 1A.

As shown in FIG. 6, the upper end portion of the joint piece 15A is provided with an upper piece 15b separated from the upper outer flap 22 by a cutting line 24. Further, the lower end portion of the joint piece 15A is provided with a lower piece 15c separated from the lower outer flap 32 by a cutting line 24. As shown in FIG. 5, the upper piece 15a is sandwiched and held between the upper inner flap 21 and the upper outer flap 22. Further, the lower piece 15b is sandwiched and held between the lower inner flap 31 and the lower outer flap 32.

In the packaging box 1A of the present embodiment, when assembling the body portion 10 from the blank sheet S1, the blank sheet S1 (see FIG. 6) is bent along each ruled line, and the joint piece 15A is attached to the facing portion 11A on the outer surface of the front end plate 11. Is joined by an adhesive means such as hot melt. When the joining piece 15A is joined to the facing portion 11A, as shown in FIG. 8B, the through hole 16 of the facing portion 11A and the recess 18A of the joining piece 15A are in a state of overlapping in the front-rear direction, and they communicate with each other.

Next, the operation of the ventilation means T1 will be described. In the packaging box 1A, the through hole 16 of the facing portion 11A and the recess 18A of the joining piece 15A communicate with each other. Therefore, as shown in FIGS. 8A and 8B, carbon dioxide in the packaging box 1A and the packaging box 1A The gas such as ethylene gas generated inside flows into the through hole 16 from the inside of the packaging box 1 through the sheet 17. The gas that has flowed into the through hole 16 flows into the recess 18A from the through hole 16 and flows into the space 19A from the recess 18A.

After that, the gas that has flowed into the space portion 19A flows through the space portion 19A toward the left end portion of the joint piece 15A, and is discharged to the outside of the joint piece 15A (outside the packaging box 1A) from each opening at the left end portion. ..

On the contrary, gas such as air outside the packaging box 1A flows into the recess 18A through the space 19A that opens to the left end portion 15A1 of the joint piece 15A. Then, the gas such as air that has flowed into the recess 18A flows into the through hole 16 from the recess 18A and is taken into the packaging box 1A through the sheet 17.
By the ventilation means T1 as described above, oxygen necessary for the continuation of respiration of fruits and vegetables is taken in, carbon dioxide and ethylene gas are discharged in a well-balanced manner, and the gas in the packaging box 1A is in the optimum state for fruits and vegetables. Be controlled.

In the packaging box 1A of the present embodiment described above, since the corrugated cardboard has horizontal stitches, the distance of the space portion 19A is shorter than that of the first embodiment, and the gas flowing into the space portion 19A from the recess 18A is introduced. It can be smoothly discharged to the outside of the packaging box 1A. In addition, gas such as air outside the packaging box 1A can be smoothly taken into the packaging box 1A.

Further, since the recess 18A is arranged on the outside of the through hole 16, it is possible to prevent the through hole 16 and the sheet 17 from being exposed to the outer surface of the packaging box 1A. As a result, the strength of the packaging box 1A can be suitably secured while preventing problems such as breakage of the sheet 17.

(Third Embodiment)
The packaging box of the third embodiment will be described with reference to FIGS. 9 to 12B. The difference between this embodiment and the first embodiment is that, as shown in FIGS. 9 and 10, the direction of the eyes of the body portion 10 (joining piece 15B) is horizontal and the joint is joined to the inner surface 11a of the front end plate 11. The point is that the ventilation means T2 is provided in the packaging box 1B to which the pieces 15B are joined.

As shown in FIG. 10, the packaging box 1B is formed by folding a blank sheet S2 obtained by cutting out a corrugated cardboard sheet into mountain folds or valley folds at each ruled line. The blank sheet S2 shown in FIG. 10 is arranged so that the inner surface side can be seen. In the blank sheet S2, the corrugated cardboard has horizontal stitches.

The joining piece 15B of the present embodiment is joined to the facing portion 11B on the inner surface of the front end plate 11 by an adhesive means such as hot melt. The through hole 16 constituting the ventilation means T2 is provided on the joint piece 15B side. The sheet 17 attached to the through hole 16 is located on the inner surface 15a side of the joint piece 15B. The through hole 16 is located substantially at the center of the joint piece 15B in the vertical direction.

As shown in FIG. 11, a recess 18B constituting the ventilation means T2 is formed on the inner surface 11a of the front end plate 11 at a position corresponding to the through hole 16 of the joint piece 15B. The recess 18B has a vertically long substantially quadrangular shape corresponding to the through hole 16 of the joint piece 15B. The recess 18B is formed by pressing a vertically long substantially quadrangular region R1B partitioned by the half-cut line L18B from the inner surface side to the outer surface side. As a result, the recess 18B has a structure that opens only to the inner surface 11a of the front end plate 11 and does not open to the outer surface of the front end plate 11.

Since the recess 18B is partitioned by the half-cut line L18B, a cross section along the notch of the half-cut line L18B is exposed in the recess 18B after the pressing process. In the present embodiment, since the corrugated cardboard is horizontal, a plurality of space portions 19B partitioned by flutes are exposed in the left cross-sectional portion and the right cross-sectional portion of the recess 18B. Each space portion 19B is open to the right end portion 11A1 of the front end plate 11 of the joint piece 15B.

As shown in FIG. 12A, the through hole 16 is arranged so as to face the recess 18B on the facing portion 11B side by joining the joining piece 15B to the facing portion 11B of the front end plate 11. As a result, the through hole 16 and the inside of the recess 18B are in communication with each other, and the inside of the packaging box 1B communicates with the through hole 16 and the recess 18B via the sheet 17 and is communicated from the recess 18B through the flute space 19B. It will be in a state of communicating with the outside of the packaging box 1B. The left edge portion 16B of the through hole 16 of the joint piece 15B is pressed. As a result, the flute opening 16C at the left edge 16B is processed into a closed state (not shown). As a result, the ventilation at the left edge portion 16B is blocked.

In the packaging box 1B of the present embodiment, when assembling the body portion 10 from the blank sheet S2, the blank sheet S2 (see FIG. 10) is bent along each ruled line, and a joining piece is attached to the facing portion 11B of the inner surface 11a of the front end plate 11. 15B is joined by an adhesive means such as hot melt. When the joining piece 15B is joined to the facing portion 11B, as shown in FIG. 12A, the through hole 16 of the facing portion 11A and the recess 18A of the joining piece 15A are in a state of overlapping in the front-rear direction, and they communicate with each other.

Next, the operation of the ventilation means T2 will be described. In the packaging box 1B, the through hole 16 of the joining piece 15B and the recess 18B of the facing portion 11B communicate with each other. Therefore, as shown in FIGS. 12A and 12B, carbon dioxide in the packaging box 1B and the packaging box 1B The gas such as ethylene gas generated inside flows into the through hole 16 from the inside of the packaging box 1B through the sheet 17. The gas that has flowed into the through hole 16 flows into the recess 18B from the through hole 16 and flows into the space 19B from the recess 18B.

After that, the gas flowing into the space portion 19B flows through the space portion 19B toward the right end portion 11A1 of the front end plate 11, and is discharged to the outside of the front end plate 11 (outside the packaging box 1B) from each opening of the right end plate 11A1. Will be done.

On the contrary, gas such as air outside the packaging box 1B flows into the recess 18B through the space 19B that opens to the right end 11A1 of the front end plate 11. Then, the gas such as air that has flowed into the recess 18B flows into the through hole 16 from the recess 18B and is taken into the packaging box 1B through the sheet 17.
By the aeration means T2 as described above, oxygen necessary for the continuation of respiration of fruits and vegetables is taken in, carbon dioxide and ethylene gas are discharged in a well-balanced manner, and the gas in the packaging box 1B is in the optimum state for fruits and vegetables. Be controlled.

Also in the packaging box 1B of the present embodiment described above, since the corrugated cardboard has horizontal stitches, the distance of the space portion 19B is shorter than that of the first embodiment, and the gas flowing into the space portion 19B from the recess 18B Can be smoothly discharged to the outside of the packaging box 1B. In addition, gas such as air outside the packaging box 1B can be smoothly taken into the packaging box 1B.

Further, since the recess 18B is arranged on the outside of the through hole 16, it is possible to prevent the through hole 16 and the sheet 17 from being exposed to the outer surface of the packaging box 1B. As a result, the strength of the packaging box 1B can be suitably secured while preventing problems such as breakage of the sheet 17.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be appropriately modified without departing from the spirit of the present invention.
For example, the body portion 10 is configured by joining four peripheral walls with a joining piece 15 (15A, 15B), but the present invention is not limited to this, and five or more peripheral walls and three or less peripheral walls are joined. It may be formed by joining at 15 (15A, 15B). In this case, one peripheral wall may be rolled into a cylindrical shape and joined by a joining piece 15 (15A, 15B).

Further, the shape of the through hole 16 and the recess 18 (18A, 18B) can be various shapes such as a triangular shape, a circular shape, and a polygonal shape. In this case, the through hole 16 and the recess 18 (18A, 18B) may have different shapes as long as gas can flow through them.

Further, the sheet 17 is shown to be attached to the inner surface 11a of the front end plate 11 or the inner surface 15a of the joint piece 15, but the present invention is not limited to this, and the facing portions 11A and 11B of the front end plate 11 (front end plate 11) are shown. And the joint piece 15 (15A, 15B) and the joint surface) may be attached.
Further, the sheets 17 may be installed at a plurality of locations in the gas flow path.

Further, the ventilation means T (T1, T2, through holes 16, recesses 18, 18A, 18B) is installed at an appropriate position in the vertical direction in consideration of gas management in the packaging box 1 (1A, 1B). be able to. Further, the ventilation means T (T1, T2) may be installed at a plurality of locations in the vertical direction. Further, a plurality of places to be joined by the joining pieces 15 (15A, 15B) are provided for one packaging box 1 (1A, 1B), and ventilation means T (T1, T2) are arranged at each place. May be good.

Moreover, although the present invention has described the example applied to the A type packaging box 1, 1A, 1B, the present invention is not limited to this, and may be applied to the wraparound type packaging box.

1,1A, 1B Packaging box 10 Body 11A, 11B Opposing part 15, 15A, 15B Joint piece 16 Through hole 17 Sheet 18, 18A, 18B Recess 19, 19A, 19B Space part 20 Top plate (cover part)
30 Bottom plate (closure)
L18, L18A, L18B Half-cut wire T, T1, T2 Ventilation means

Claims (4)

A body portion formed by joining a joining piece provided at one end of the peripheral wall to an opposing portion provided at the other end of the peripheral wall, and a body portion.
A corrugated cardboard packaging box provided with a lid portion arranged in the opening of the body portion.
The joint piece is attached to the facing portion from the outer surface side of the other end portion of the peripheral wall.
The facing portion is provided with a through hole penetrating in the thickness direction of the peripheral wall.
The joint piece is provided with a recess that is opened by a half-cut line and communicates with the through hole to expose a space formed by a flute through the opening.
A packaging box characterized in that the through hole is covered with a sheet having a gas permeability, and the space portion is opened at an end portion of the joint piece. A body portion formed by joining a joining piece provided at one end of the peripheral wall to an opposing portion provided at the other end of the peripheral wall, and a body portion.
A corrugated cardboard packaging box provided with a lid portion arranged in the opening of the body portion.
The joint piece is attached to the facing portion from the inner surface side of the other end portion of the peripheral wall.
The joint piece is provided with a through hole penetrating in the thickness direction of the joint piece.
The facing portion is provided with a recess that is opened by a half-cut line and communicates with the through hole to expose the space portion formed by the flute through the opening.
A packaging box characterized in that the through hole is covered with a sheet having a gas permeability, and the space portion is opened at an end portion of the facing portion of the peripheral wall. The packaging box according to claim 1, wherein the side plate and the joint piece are oriented in the vertical direction. The lid portion is composed of a plurality of flaps connected to the body portion.
Between the adjacent flaps, a slit portion cut from the tip end side to the proximal end portion side of the flap, and a cutting line formed on the proximal end side of the flap and continuous with the slit portion. The packaging box according to any one of claims 1 to 3, wherein the packaging box is provided with.

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