JP7318543B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes.

2. Description of the Related Art Conventionally, as a corrugated cardboard packaging box, one in which a through hole is provided in a peripheral wall is known (see, for example, Patent Document 1).
The packaging box of Patent Literature 1 can ensure air permeability inside and outside the box through the through holes.

JP 2019-108163 A

In the packaging box of Patent Document 1 described above, the air inside and outside the box flows freely through the through holes, so the sealing performance could not be maintained. In addition, since the air inside and outside the box freely flows through the through holes, it is difficult to control the gas inside the box and maintain the freshness of the packaged items. Furthermore, the strength of the packaging box tends to decrease due to the structure in which the through holes are opened in the peripheral wall.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems and to provide a packaging box that maintains airtightness while ensuring ventilation, and in addition, does not easily decrease in strength.

In order to solve the above-mentioned problems, the present invention provides a packaging box comprising a body formed by joining a joining piece provided at one end of a peripheral wall to a facing portion provided at the other end of the peripheral wall. , and a lid disposed at the opening of the body. The joint piece is attached to the opposing portion from the outer surface side of the other end portion of the peripheral wall. The opposing 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, and exposes a space formed by the flute through the opening. The through holes are covered with a gas-permeable sheet. The space is open at the end of the joining piece. The sheet is a film having a large number of vent holes through which gas can flow.

The present invention also provides a packaging box, comprising: a trunk portion formed by joining a joining piece provided at one end of a peripheral wall to a facing portion provided at the other end of the peripheral wall; A cardboard packaging box comprising a lid portion arranged at 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 opposing portion is provided with a concave portion which is opened by a half-cut line and communicates with the through hole so as to expose a space portion formed by the flute through the opening. The through hole is covered with a gas-permeable sheet, and the space is open at the end of the facing portion of the peripheral wall. The sheet is a film having a large number of vent holes through which gas can flow.

In the packaging box of the present invention, the through holes communicate with the recesses, and the spaces formed by the flutes communicate with the recesses. , from the recess to the outside of the packaging box through the space. Conversely, the gas outside the packaging box flows through the space from the recess to the through hole and is taken into the packaging box through the sheet. Therefore, it is possible to ensure ventilation while maintaining the sealing performance of the packaging box.
In addition, the gas-permeable sheet allows carbon dioxide, ethylene gas, etc. to escape outside the box while taking in oxygen necessary for the respiration of fruits and vegetables, for example, when the items to be packaged are fruits and vegetables. As a result, the concentration of the gas inside the box can be controlled to an optimal state for the fruits and vegetables.
In addition, since the strength of the packaging box is higher in the portion where the joint piece is joined than in the other portion, the strength is less likely to decrease even if the through hole and the recess are provided.

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

Moreover, it is preferable that the grain direction of the opposing portion and the joint piece is the longitudinal grain direction. With this configuration, the openings of the space communicating with the recess can be arranged at two positions above and below the joint piece, so that ventilation can be ensured while maintaining the sealing performance of the box.

Further, the lid portion is composed of a plurality of flaps connected to the body portion, and slit portions are formed between the adjacent flaps from the distal end side to the proximal end side of the flaps. It is preferably notched. In this case, it is preferable that a cutting line continuing to the slit portion is formed on the proximal end side of the flap.

With such a configuration, when the adjacent flaps are closed when closing the packaging box, the adjacent portions along the cutting line are bent so as to be vertically overlapped, so that a gap is hardly formed at the base ends of the flaps. Therefore, it is possible to suitably ensure ventilation while maintaining the sealing performance of the box.

According to the present invention, it is possible to obtain a packaging box that maintains airtightness while ensuring ventilation, and in addition, the strength of which does not easily decrease.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view which looked at the packaging box which concerns on 1st Embodiment of this invention from the front upper left. It is the figure which showed the blank sheet of the packaging box which concerns on 1st Embodiment of this invention. It is the perspective view which showed the periphery of the through-hole of the packaging box which concerns on 1st Embodiment of this invention, and a recessed part periphery. FIG. 4 is an explanatory view of the action of the packaging box according to the first embodiment of the present invention; FIG. 4B is an explanatory view showing the flow of gas in the packaging box according to the first embodiment of the present invention in cross section along line IV-IV of FIG. 4A; It is the perspective view which looked at the packaging box which concerns on 2nd Embodiment of this invention from the front upper left. It is the figure which showed the blank sheet of the packaging box which concerns on 2nd Embodiment of this invention. It is the perspective view which showed the periphery of the through-hole of the packaging box which concerns on 2nd Embodiment of this invention, and a recessed part periphery. FIG. 10 is an explanatory view of the action of the packaging box according to the second embodiment of the present invention; FIG. 8B is an explanatory view showing the flow of gas in the packaging box according to the second embodiment of the present invention in cross section along line VIII-VIII of FIG. 8A; It is the perspective view which looked at the packaging box which concerns on 3rd Embodiment of this invention from the front upper left. It is the figure which showed the blank sheet of the packaging box which concerns on 3rd Embodiment of this invention. It is the perspective view which showed the periphery of the through-hole of the packaging box which concerns on 3rd Embodiment of this invention, and a recessed part periphery. It is action explanatory drawing of the packaging box which concerns on 3rd Embodiment of this invention. FIG. 12B is an explanatory view showing the flow of gas in the packaging box according to the third embodiment of the present invention in cross section along line XII-XII in 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, rear, left, right, up and down directions are set for convenience in describing 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 denoted by the same reference numerals, and overlapping descriptions are omitted.

(First embodiment)
As shown in FIG. 1, the packaging box 1 is an A-type corrugated cardboard box, and includes a rectangular tubular body 10, a top plate (cover) 20 connected to the upper edge of the body 10, and a body. and a bottom plate (lid portion) 30 connected to the lower edge portion of the portion 10 . As will be described later, the packaging box 1 is provided with ventilation means T for communicating between the inside and outside of the packaging box 1 by means of a joint piece 15 and a 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 mountain-folding or valley-folding a blank sheet S obtained by cutting out a corrugated cardboard sheet. The blank sheet S shown in FIG. 2 is arranged so that the inner side can be seen. The blank sheet S has vertical grains of corrugated cardboard.
Each ruled line (folded line) of the blank sheet S is a linear groove (press ruled line) formed by pressing the surface of the blank sheet S. As shown in FIG. Note that notches may be formed in the ruled lines. By doing so, it becomes easier to fold the blank sheet S at the ruled line.

The body portion 10 consists 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 rectangular shape.
A left side plate 13 is connected to the left edge of the front end plate 11 via a ruled line. A rear end plate 12 is connected to the rear edge of the left side plate 13 via a ruled line. A right side plate 14 is connected to the right edge of the rear end plate 12 via a ruled line. A vertically elongated belt-like joining piece 15 is connected to the front edge of the right side plate 14 via a ruled line. The joint piece 15 is joined to the outer surface of the front end plate 11 by an adhesive means such as hot melt.

When the blank sheet S (see FIG. 2) is folded along the respective ruled lines, the front end plate 11, the rear end plate 12, the left side plate 13, and the right side plate 14 form the body portion 10 in the shape of a square tube.

The joint piece 15 is joined to the right edge of the outer surface of the front end plate 11 as described above. As a result, the right edge of the outer surface of the front end plate 11 is covered with the joint piece 15 almost entirely in the vertical direction. As shown in FIGS. 2 and 3, a through-hole 16 forming a ventilation means T is formed in a facing portion 11A (a region where the joint piece 15 is adhered) of the front end plate 11 facing the joint piece 15. As shown in FIGS. . The through hole 16 is a hole penetrating 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 square shape when viewed from the front. The through hole 16 is positioned above the facing portion 11A.

The through hole 16 is covered with a substantially rectangular sheet 17, as shown in FIGS. The sheet 17 is a gas-permeable transparent film, and is attached around the hole edge of the inner surface 11a of the front end plate 11 with an adhesive applied around the hole edge. It covers the inside of the plate 11 . The sheet 17 is provided with a large number of fine vent holes (not shown) to allow gas flow. As a result, the gas inside the packaging box 1 is discharged through the sheet 17 into the through-hole 16 , and the gas inside the through-hole 16 is taken into the packaging box 1 through the sheet 17 . The number and size of the minute air holes are appropriately set in consideration of the type and weight of the objects to be contained in the packaging box 1, the environment of gas circulation in the packaging box 1, and the like. For example, if the objects to be stored are fruits and vegetables, the number and size of ventilation holes should be set so that the oxygen necessary for the continuation of respiration 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, the inner surface 15a of the joining piece 15 is formed with two upper and lower concave portions 18, 18 forming the ventilation means T at positions corresponding to the through holes 16 of the facing portion 11A. Each concave portion 18 has a horizontally elongated substantially quadrangular shape. Each concave portion 18 is formed by pressing laterally elongated substantially rectangular regions R1, R1 partitioned by the half-cut line L18 from the inner surface side toward the outer surface side. As a result, each recess 18 has a structure in which it opens only on the inner surface 15 a of the joint piece 15 and does not open on the outer surface of the joint piece 15 .
Since each recess 18 is defined 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 pressing. In this embodiment, since the corrugated cardboard is longitudinally grained, a plurality of spaces 19 partitioned by flutes are exposed in the upper and lower cross-sectional portions of each recess 18 . Each space 19 opens at the upper end and the lower end of the joining piece 15 (only the space 19 opened at the upper end is shown in FIG. 3).

As shown in FIG. 4A, each concave portion 18 is arranged so as to face the through hole 16 on the facing portion 11A side by connecting the connecting piece 15 to the facing portion 11A of the front end plate 11 . As a result, the interior of each recess 18 communicates with the through hole 16 , and the interior of the packaging box 1 communicates with the through hole 16 and each recess 18 via the sheet 17 , and the flute space from each recess 18 . It will be 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. The top plate 20 closes the upper opening of the body 10, as shown in FIG. The top plate 20 has a pair of front and rear upper inner flaps 21 , 21 connected to the upper edges of the front end plate 11 and the rear end plate 12 . A pair of left and right upper outer flaps 22 , 22 connected to the upper edges of the left side plate 13 and the right side plate 14 are superimposed on the outer surface (upper surface) of the top plate 20 .

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

The left upper outer flap 22 is a rectangular flat plate and extends rightward from the upper edge of the left side plate 13 . The left half of the upper opening of the body 10 is closed by the left upper outer flap 22 .
The right upper outer flap 22 is a rectangular flat plate and extends leftward from the upper edge of the right side plate 14 . The right half of the upper opening of the trunk 10 is closed by the upper outer flap 22 on the right side.
The edge portions of the left and right upper outer flaps 22, 22 are butted against each other at the center portion in the left-right direction and joined with an adhesive tape (not shown) as a sealing tape.

The bottom plate 30 closes the lower opening of the body 10, as shown in FIG. The bottom plate 30 has a pair of front and rear lower inner flaps 31 , 31 connected to the lower edges of the front end plate 11 and the rear end plate 12 . 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 superimposed on the outer surface (lower surface) of the bottom plate 30 .

The front lower inner flap 31 is a rectangular flat plate and extends rearward from the lower edge of the front end plate 11 . The lower inner flap 31 on the front side closes a part of the lower opening of the body section 10 on the front side.
The rear lower inner flap 31 is a rectangular flat plate and extends forward from the lower edge of the rear end plate 12 . A lower inner flap 31 on the rear side closes a part of the rear side of the lower opening of the body section 10 .

The left lower outer flap 32 is a rectangular flat plate extending rightward from the lower edge of the left side plate 13 . The left half of the lower opening of the trunk 10 is closed by the left lower outer flap 32 .
The right lower outer flap 32 is a rectangular flat plate and extends leftward from the lower edge of the right side plate 14 . The right half of the lower opening of the trunk 10 is closed by the right lower outer flap 32 .
The edges of the left and right lower outer flaps 32, 32 are butted against each other at the center in the left-right direction and joined with an adhesive tape (not shown) as a sealing tape.

Between the upper inner flap 21 and the upper outer flap 22, as shown in FIG. 2, a slit portion 23 is formed by cutting from the distal end side to the proximal end side of the flap. 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, a slit portion 23 is provided between the upper inner flap 21 and the upper outer flap 22. A cutting line 24 is formed that continues to the . 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 projected.

The slit portion 23 forms a gap between the upper inner flap 21 and the upper outer flap 22 to separate them at a predetermined distance. On the other hand, since the cutting line 24 is formed continuously with the slit portion 23, when the adjacent flaps are closed, the proximal end portions of the upper inner flap 21 and the upper outer flap 22 are close to each other and are vertically cut. acts so as to overlap (overlap). Moreover, the folding piece 25 is positioned so as to be folded between the flaps when the adjacent flaps are closed.

Between the lower inner flap 31 and the lower outer flap 32, a slit portion 23, a cutting line 24 and a bent piece 25 are similarly formed. The slit portion 23 forms a gap between the lower inner flap 31 and the lower outer flap 32 to separate them at a predetermined interval. In addition, the cutting line 24 acts so that the base ends of the lower inner flap 31 and the lower outer flap 32 are close to each other and overlap each other in the vertical direction when the adjacent flaps are closed. do. Moreover, the folding 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 folded along 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. are 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 the concave portions 18 of the joining piece 15 overlap in the front-rear direction, and communicate with each other.

After that, the bottom plate 30 is closed by folding the lower inner flap 31 and the lower outer flap 32 . As a result, the proximal ends of the adjacent lower inner flap 31 and lower outer flap 32 are vertically overlapped via the cutting line 24, and the proximal ends are closed without any gap. Also, the bent piece 25 is folded between the flaps to close the base ends without gaps.

After the bottom plate 30 is closed, the packaging box 1 is filled with the items such as fruits and vegetables. Then, the top plate 20 is closed by folding the upper inner flap 21 and the upper outer flap 22 . In this case as well, the base ends of the upper inner flap 21 and the upper outer flap 22 that are adjacent to each other overlap in the vertical direction via the cutting line 24, and the base ends are closed without any gap. Also, the bent piece 25 is folded between the flaps to close the base ends without gaps.

Next, the action of the ventilation means T will be described. In the packaging box 1, the through holes 16 of the facing portion 11A and the recesses 18 of the joint pieces 15 communicate with each other. Therefore, as shown in FIGS. A gas such as ethylene gas generated inside the packaging box 1 flows into the through hole 16 from inside the packaging box 1 through the sheet 17 . The gas that has flowed into the through-holes 16 flows from the through-holes 16 into the recesses 18 and from the recesses 18 into the space 19 .

After that, the gas that has flowed into the space 19 flows through the space 19 toward the upper end and the lower end of the joining piece 15, and passes through the openings of the upper end and the lower end of the joining piece 15 to the outside of the joining piece 15 (the packaging box 1). outside).

Also, contrary to this. A gas such as air outside the packaging box 1 flows into each recess 18 through a space 19 opened at the upper end and the lower end of the joining piece 15 . Gas such as air that has flowed into each recess 18 flows from each recess 18 into the through hole 16 and is taken into the packaging box 1 through the sheet 17 .
The aeration means T as described above takes in oxygen necessary for continued respiration of fruits and vegetables and discharges carbon dioxide and ethylene gas in a well-balanced manner so that the gas in the packaging box 1 is in an optimum state for the fruits and vegetables. controlled.

In the packaging box 1 of this embodiment described above, the ventilation means T of the packaging box 1 can ensure ventilation while maintaining the sealing performance of the packaging box 1 .
In addition, the gas-permeable sheet 17 allows carbon dioxide, ethylene gas, and the like to escape to the outside of the box while taking in oxygen necessary for the respiration of fruits and vegetables, for example, when the items to be packaged are fruits and vegetables. . As a result, the concentration of the gas inside the packaging box 1 can be controlled to be optimal for the fruits and vegetables.

Moreover, since the strength of the packaging box 1 is higher in the portion where the joint piece 15 is joined than in the other portion, it is suitable to provide the through hole 16 and the concave portions 18 , 18 . Therefore, it is possible to obtain the packaging box 1 whose strength does not easily decrease even if the through hole 16 and the concave portions 18, 18 are provided.

Further, the through holes 16 and the sheet 17 provided in the facing portion 11A can be covered with the joint piece 15 from the outside. Thereby, it is possible to prevent the through holes 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 ensured while preventing problems such as breakage of the sheet 17 .

Moreover, since the joint piece 15 is oriented in the longitudinal direction, the openings of the space 19 communicating with the concave portions 18 can be arranged at two positions above and below the joint piece 15 . This reduces the risk that the space 19 (ventilation path) will be blocked.

Moreover, since the slit portion 23 is formed between the upper inner flap 21 and the upper outer flap 22 adjacent to each other, the flaps can be easily folded and stacked. Also, the cutting line 24 is formed continuously with the slit portion 23 . When the flaps adjacent to each other are closed when closing the top plate 20 or the like, the portions adjacent to each other along the cutting line 24 are bent so as to be vertically overlapped. As a result, gaps are less likely to be formed at the proximal ends of the flaps. Therefore, it is possible to suitably ensure ventilation while maintaining the sealing performance of the packaging box 1 .

(Second embodiment)
A packaging box according to the second embodiment will be described with reference to FIGS. 5 to 8B. This embodiment differs from the first embodiment in that, as shown in FIGS. 5 and 6, a ventilation means T1 is provided in a packaging box 1A in which the grain direction of the trunk portion 10 (joint piece 15A) is horizontal. It is in.

As shown in FIG. 6, the packaging box 1A is formed by mountain-folding or valley-folding a blank sheet S1 obtained by cutting out a corrugated cardboard sheet. The blank sheet S1 shown in FIG. 6 is arranged so that the inner side can be seen. The blank sheet S1 has a cross-grained corrugated board.

The through-hole 16 constituting the ventilation means T1 is positioned substantially in the center of the facing portion 11A of the front end plate 11 in the vertical direction. A sheet 17 is similarly 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, the inner surface 15a of the joining piece 15A is formed with a recess 18A forming the ventilation means T1 at a position corresponding to the through hole 16 of the facing portion 11A. The recess 18</b>A has a vertically elongated substantially rectangular shape corresponding to the through hole 16 of the front end plate 11 . The concave portion 18A is formed by pressing the vertically elongated substantially rectangular region R1A defined by the half-cut line L18A from the inner surface side toward the outer surface side. As a result, the recess 18A has a structure in which it opens only on the inner surface 15a of the joint piece 15A and does not open on the outer surface of the joint piece 15A.
Since the recess 18A is defined by the half-cut line L18A, a section along the notch of the half-cut line L18A is exposed in the recess 18A after pressing. In this embodiment, since the corrugated cardboard has a horizontal grain, 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 concave portion 18A. Each space 19A opens at the left end 15A1 of the joint piece 15A.

As shown in FIG. 8A, the recess 18A is arranged so as to face the through hole 16 on the side of the facing portion 11A by joining the connecting piece 15A to the facing portion 11A of the front end plate 11. As shown in FIG. As a result, the interior of the recess 18A communicates with the through hole 16, and the interior of the packaging box 1A communicates with the through hole 16 and the recess 18A via the sheet 17, and from the recess 18A via the space 19A of the flute. It will be in a state of communicating with the outside of the packaging box 1A.

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

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 folded along each ruled line, and the joining piece 15A is attached to the facing portion 11A on the outer surface of the front end plate 11. are 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 concave portion 18A of the joining piece 15A overlap in the front-rear direction, and communicate with each other.

Next, the action of the ventilation means T1 will be described. In the packaging box 1A, the through hole 16 of the facing portion 11A and the recessed portion 18A of the joint piece 15A communicate with each other. A gas such as ethylene gas generated inside flows into the through hole 16 from inside the packaging box 1 through the sheet 17 . The gas that has flowed into the through-hole 16 flows from the through-hole 16 into the recess 18A, and then flows into the space 19A from the recess 18A.

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

Conversely, gas such as air outside the packaging box 1A flows into the recess 18A through the space 19A opening at the left end 15A1 of the joining piece 15A. Then, 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. As shown in FIG.
The ventilation means T1 as described above takes in oxygen necessary for continued respiration of fruits and vegetables, and discharges carbon dioxide and ethylene gas in a well-balanced manner, so that the gas inside the packaging box 1A is in an optimum state for the fruits and vegetables. controlled.

In the packaging box 1A of the present embodiment described above, since the corrugated cardboard has a horizontal grain, the distance of the space 19A is shorter than that of the first embodiment, and the gas flowing into the space 19A from the recess 18A is removed. It can be discharged smoothly to the outside of the packaging box 1A. Also, 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 outside the through-hole 16, the through-hole 16 and the sheet 17 can be prevented 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 ensured while preventing problems such as breakage of the sheet 17. As shown in FIG.

(Third embodiment)
A packaging box according to the third embodiment will be described with reference to FIGS. 9 to 12B. This embodiment differs from the first embodiment in that, as shown in Figs. The point is that ventilation means T2 is provided in the packaging box 1B to which the piece 15B is joined.

As shown in FIG. 10, the packaging box 1B is formed by mountain-folding or valley-folding a blank sheet S2 obtained by cutting out a corrugated cardboard sheet. The blank sheet S2 shown in FIG. 10 is arranged so that the inner side can be seen. The blank sheet S2 has a cross-grained corrugated cardboard.

The joint piece 15B of this 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 forming the ventilation means T2 is provided on the joint piece 15B side. The sheet 17 attached to the through hole 16 is positioned on the inner surface 15a side of the joining piece 15B. The through hole 16 is positioned substantially in the center of the joining piece 15B in the vertical direction.

As shown in FIG. 11, the inner surface 11a of the front end plate 11 is formed with a concave portion 18B forming a ventilation means T2 at a position corresponding to the through hole 16 of the joint piece 15B. The concave portion 18B has a vertically elongated substantially rectangular shape corresponding to the through hole 16 of the joint piece 15B. The concave portion 18B is formed by pressing the vertically elongated substantially rectangular region R1B partitioned by the half-cut line L18B from the inner surface side toward the outer surface side. As a result, the recessed portion 18B has a structure in which it opens only on the inner surface 11a of the front end plate 11 and does not open on the outer surface of the front end plate 11. As shown in FIG.

Since the recess 18B is defined by the half-cut line L18B, a section along the notch of the half-cut line L18B is exposed in the recess 18B after pressing. In this embodiment, since the corrugated cardboard has a horizontal grain, 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 concave portion 18B. Each space 19B opens to the right end 11A1 of the front end plate 11 of the joint piece 15B.

As shown in FIG. 12A, the through hole 16 is arranged to face the recess 18B on the side of the facing portion 11B by joining the connecting piece 15B to the facing portion 11B of the front end plate 11 . As a result, the through hole 16 communicates with the interior of the recess 18B, and the interior of the packaging box 1B communicates with the through hole 16 and the recess 18B through the sheet 17, and from the recess 18B through the space 19B of the flute. It will be in a state of communicating with the outside of the packaging box 1B. A 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 closed (not shown). This blocks ventilation at the left edge 16B.

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 folded along each ruled line, and the 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 recessed portion 18A of the joining piece 15A overlap in the front-rear direction and communicate with each other.

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

After that, the gas that has flowed into the space 19B flows through the space 19B toward the right end 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 11A1. be done.

On the contrary, gas such as air outside the packaging box 1B flows into the concave portion 18B through the space portion 19B opened at the right end portion 11A1 of the front end plate 11. As shown in FIG. Then, 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. As shown in FIG.
The ventilation means T2 as described above takes in oxygen necessary for continued respiration of fruits and vegetables, and discharges carbon dioxide and ethylene gas in a well-balanced manner, so that the gas inside the packaging box 1B is in an optimum state for the fruits and vegetables. controlled.

Also in the packaging box 1B of the present embodiment described above, since the corrugated cardboard has a horizontal grain, the distance of the space 19B is shorter than that of the first embodiment, and the gas flowing into the space 19B from the recess 18B can be smoothly discharged to the outside of the packaging box 1B. Also, 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 outside the through-hole 16, the through-hole 16 and the sheet 17 can be prevented 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 ensured while preventing troubles such as breakage of the sheet 17. As shown in FIG.

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

Moreover, various shapes such as a triangular shape, a circular shape, and a polygonal shape can be adopted as the shape of the through hole 16 and the concave portions 18 (18A, 18B). In this case, the through holes 16 and the recesses 18 (18A, 18B) may have different shapes as long as the gas can flow.

Also, although the sheet 17 is attached to the inner surface 11a of the front end plate 11 and the inner surface 15a of the joint piece 15, the sheet 17 is not limited to this. and joint pieces 15 (15A, 15B)).
Also, the sheet 17 may be installed at a plurality of locations in the gas communication path.

In addition, the ventilation means T (T1, T2, through holes 16, recesses 18, 18A, 18B) are installed at appropriate positions in the vertical direction in consideration of gas management in the packaging box 1 (1A, 1B). be able to. Also, the ventilation means T (T1, T2) may be installed at a plurality of locations in the vertical direction. In addition, a plurality of locations 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 for each location. good too.

Moreover, although the present invention has been described as applied to the A-type packaging boxes 1, 1A, and 1B, the present invention is not limited to this, and may be applied to wrap-around-type packaging boxes.

Reference Signs List 1, 1A, 1B packaging box 10 body 11A, 11B facing portion 15, 15A, 15B joining piece 16 through hole 17 sheet 18, 18A, 18B recess 19, 19A, 19B space 20 top plate (cover)
30 bottom plate (cover)
L18, L18A, L18B Half-cut line T, T1, T2 Ventilating means

Claims (4)

a trunk portion formed by joining a joining piece provided at one end of the peripheral wall to a facing portion provided at the other end of the peripheral wall;
A corrugated cardboard packaging box comprising a lid portion disposed at 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, and exposes a space formed by the flute through the opening,
The through-hole is covered with a gas-permeable sheet, and the space is open at the end of the joining piece,
A packaging box , wherein the sheet is a film having a large number of vent holes through which gas can flow . a trunk portion formed by joining a joining piece provided at one end of the peripheral wall to a facing portion provided at the other end of the peripheral wall;
A corrugated cardboard packaging box comprising a lid portion disposed at 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, and exposes a space formed by the flute through the opening,
The through-hole is covered with a gas-permeable sheet, and the space is open at the end of the facing portion of the peripheral wall,
A packaging box , wherein the sheet is a film having a large number of vent holes through which gas can flow . 2. The packaging box according to claim 1, wherein the grain direction of the facing portion and the joint piece is the longitudinal grain direction. The lid portion is composed of a plurality of flaps connected to the body portion,
Between the adjacent flaps, a slit section cut from the distal end side of the flap toward the proximal side, and a cutting line formed on the proximal side of the flap and continuing to the slit section. 4. The packaging box according to any one of claims 1 to 3, characterized in that it is provided with .

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