JP6863051B2 - Packaging box and blank sheet - Google Patents

Description

The present invention relates to a packaging box and a blank sheet.

A corrugated cardboard wrap round box, which is an example of a packaging box, has a bottom plate, front and rear side walls connected to the bottom plate, left and right side walls connected to the bottom plate, and a top plate connected to the upper edge of the rear wall. And a front flap connected to the front edge of the top plate. The inner surface of the front flap and the outer surface of the front wall are joined to each other, thereby sealing the packaging box. On the other hand, the front flap has two openings that penetrate back and forth, the top plate has left and right perforations leading to the flap openings, and the packaging box is opened by cutting each perforation. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2015-168445

By the way, when opening the above-mentioned packaging box, first, the user's finger or the like is inserted into the opening of the front flap, and the top plate sandwiched between the perforations is opened so that the perforation of the top plate is cut. The department is pulled up. On the other hand, in the packaging box during storage, the edge partitioning the opening of the front flap continues to be exposed to the outside air or the like. Therefore, dust and dirt contained in the outside air may accumulate on the edge of the opening into which the user's finger or the like is inserted or on the inside of the front flap.
An object of the present invention is to provide a packaging box and a blank sheet capable of improving the cleanliness at a place where a user's finger or the like touches when opening the packaging box.

The packaging box for solving the above-mentioned problems is a packaging box, which includes a bottom plate, front, rear, left and right side walls surrounding the bottom plate with an upper edge for partitioning an opening facing the bottom plate, and one said side wall. It includes a top plate connected to the upper edge of the rear wall to cover the opening, and a front flap connected to the front edge of the top plate and joined to the outer surface of the front wall. The top plate includes first perforations extending from a pair of left and right front ends located on the front edge of the top plate toward the upper edge of the rear wall, and a region surrounded by the first perforations in the top plate. Is the first opening portion for providing the opening. The front edge of the top plate connects one second perforation and the left and right ends of the second perforation to separate front ends of the first perforation between the pair of front ends of the first perforation. It has a pair of folding lines on the left and right. The front flap has a geometric shape with the folding line as one side, and is provided with a third perforation for forming an insertion hole in the front flap, and the upper edge of the front wall is formed with the insertion hole. A notch is provided at a position facing the region.

A blank sheet for solving the above problems is provided on a bottom plate, front and rear left and right side walls surrounding the bottom plate provided with an upper edge for partitioning an opening facing the bottom plate, and an upper edge of a rear wall which is one of the side walls. It is a blank sheet used for manufacturing a packaging box including a top plate which is connected to cover the opening and a front flap which is connected to the front edge of the top plate and joined to the outer surface of the front wall. The front flap, the top plate, the rear wall, the bottom plate, and the front wall are connected in this order, and the top plate is located on the front edge of the top plate from a pair of left and right front ends to the rear wall. A first perforation extending toward the upper edge is provided, and a region surrounded by the first perforation in the top plate is a first opening portion for providing the opening. Then, the front edge of the top plate is between the pair of front ends of the first perforation, one second perforation, and the left and right ends of the second perforation are separate front ends of the first perforation. The front flap is provided with a pair of fold lines on the left and right sides to be connected to the front flap, has a geometric shape with the fold line as one side, and is provided with a third perforation for forming an insertion hole in the front flap. The upper edge is provided with a notch at a position facing the region to be the insertion hole.

According to the packaging box and the blank sheet, when the packaging box is opened, the user first allows the portion of the front flap surrounded by the third perforation to penetrate the notch in the front wall. It is pushed in with a finger or the like to form an insertion hole in the front flap. Next, the front edge of the top plate is pulled up so that the second perforation is cut with a finger or the like inserted into the insertion hole, and then the first perforation of the top plate is cut from the front to the rear. Will be done. As a result, the part that the user's finger or the like touches when opening the packaging box, that is, the inner edge of the notch on the front wall is covered with the front flap in the state before opening, so that the user's finger or the like touches. It is possible to improve the cleanliness of the place.

In the packaging box, outer flaps that are separately connected to the left and right edges of the top plate to form the left and right side walls are further provided, and each of the first perforations is located between the pair of front ends and the left and right edges. It is composed of a first portion that extends to the end with an inclination with respect to the left and right edges, and a second portion that extends from the rear end of the first portion toward the upper edge of the rear wall and constitutes the left and right edges. The left and right edges are composed of the second portion and the fourth perforation other than the second portion, and the top plate is the first of the front edges of the top plate from the end of the front edge. From the portion up to the front end of the perforation, the first portion, a pair of left and right second opening portions surrounded by the fourth perforation, and the first opening portion surrounded by the first perforation. It may be configured.

According to the packaging box, in the top plate, the first part, the fourth perforation, and each second opening surrounded by the front edge of the top plate are separated from the first opening and the outer flap. Therefore, it is connected only to the front flap and via the front edge. Therefore, after the first perforation is cut, that is, after the first opening is opened, it is possible to raise the second opening with the front edge of the top plate as the rotation axis. , It is also possible to open the entire opening.

In the packaging box, the third perforations are a pair of perforations on the left and right, and the size of each notch is larger than the region serving as the insertion hole when viewed from the direction facing the front wall. You may. According to this packaging box, when the area defined by the third perforation is pushed by a finger or the like and the third perforation is cut by the pressing, the front wall is prevented from hindering the pushing of the finger or the like.

In the packaging box, a fifth perforation may be provided in a portion of the front edge of the top plate from the end of the front edge to the front end of the first perforation. According to this packaging box, each second opening surrounded by the first portion, the fourth perforation, and the fifth perforation is opened after the first perforation is cut, that is, the first opening. After being opened, it can be separated from the outer flap through cutting at the second perforation and the fifth perforation.

The perspective view which shows the perspective structure of a packaging box. FIG. 5 is an enlarged cross-sectional view showing a part of the cross-sectional structure of the packaging box. A plan view showing a blank sheet for manufacturing a packaging box. The perspective view which shows the perspective structure of the packaging box in the process of opening a packaging box. The perspective view which shows the perspective structure of the packaging box in the process of opening a packaging box. The perspective view which shows the perspective structure of the packaging box in the process of opening a packaging box.

An embodiment of the packaging box and the blank sheet will be described with reference to FIGS. 1 to 6. In the following description, a corrugated cardboard lapland box is shown as an example of the packaging box, and among the pair of side walls in the packaging box, one side wall to which the front flaps are joined faces the front wall and the front wall. The other side wall is used as the rear wall, and the front-back direction and the left-right direction are defined.

[Packaging box]
As shown in FIG. 1, the rectangular parallelepiped packaging box includes a bottom plate 11, front, rear, left and right side walls 12, 13, 14, 15, a top plate 16, and a front flap 17. The front, rear, left, and right side walls 12, 13, 14, and 15 have an upper edge for partitioning the rectangular opening 11T facing the bottom plate 11 and surround the bottom plate 11. The top plate 16 is connected to the upper edge 13U of the rear wall 13 which is one side wall, and covers the entire opening 11T. The front flap 17 has a strip shape connected to the front edge 16F of the top plate 16 and joined to the outer surface of the front wall 12.

The top plate 16 includes a right edge 16R having a linear shape extending in the front-rear direction and a left edge 16L having a straight line extending in the front-rear direction. The right edge 16R and the left edge 16L are examples of left and right edges that are a pair of left and right edges. The right wall 14, which is one side wall, includes an outer flap 14F1 connected to the right edge 16R of the top plate 16 and an outer flap 14F2 connected to the bottom plate 11. The left wall 15, which is one side wall, includes an outer flap 15F1 (see FIG. 2) connected to the left edge 16L of the top plate 16 and an outer flap 15F2 (see FIG. 2) connected to the bottom plate 11.

The top plate 16 includes a first perforation. The first perforation is composed of two first opening lines 1L1 and two second opening lines 1L2. The front end of each first opening line 1L1 is located at the front edge 16F of the top plate 16, and the rear end 1LC of each first opening line 1L1 is located in the middle of the separate left and right edges of the top plate 16. Each first opening line 1L1 has a linear shape having an inclination with respect to the left and right edges. Each second opening line 1L2 extends from the rear end 1LC of the separate first opening line 1L1 toward the upper edge 13U of the rear wall 13 and constitutes the left and right edges of the top plate 16. In the top plate 16, the hexagonal plate-shaped region surrounded by the first perforation is one first opening portion 161 for opening the opening 11T.

Each left and right edge of the top plate 16 is composed of one second opening line 1L2 and one fourth opening line 16S. Each of the fourth opening lines 16S is an example of a fourth perforation, and is a perforation in which the top plate 16 and the outer flaps 14F1 and 15F1 are connected in series. Each fourth opening line 16S extends from the left and right ends of the front edge 16F of the top plate 16 to the rear end 1LC of the first opening line 1L1.

The front edge 16F of the top plate 16 is a start line which is a perforation between a pair of rotating axes 16E on the left and right, a pair of folding lines B on the left and right sandwiched between the pair of rotating axes 16E, and a pair of folding lines B. It is composed of 16C. One starting line 16C is an example of the second perforation. Each folding line B connects the left and right ends of the starting line 16C to the front end of the first opening line 1L1. In the top plate 16, the region having a triangular plate shape surrounded by the rotation axis 16E, the first opening line 1L1, and the fourth opening line 16S is a pair of second opening portions 162 on the left and right. The top plate 16 is composed of a first opening portion 161 surrounded by the first perforation and these two second opening portions 162.

The front flap 17 includes push lines 17C which are a pair of perforations on the left and right sides. Each push line 17C is an example of a third perforation. Each push line 17C has a semicircular shape with each folding line B included in the front edge 16F of the top plate 16 as a chord. Each push-in wire 17C is a hole having the push-in wire 17C as an edge, and is a perforation for forming an insertion hole in the front flap 17 into which a finger is inserted into the inside of the packaging box.

As shown in FIG. 2, the inner surface of the front flap 17 and the outer surface of the front wall 12 are joined by a joint portion A. The upper edge 12U of the front wall 12 is provided with a notch 12T which is a recess toward the lower edge of the front wall 12 at a position facing each push line 17C. Each notch 12T has a semicircular shape with each polygonal line B as a chord, like the indentation line 17C. The size of each notch 12T is larger than the area defined by each push line 17C when viewed from the direction facing the front wall 12.

[Blank sheet]
Next, a blank sheet for manufacturing a packaging box will be described.
As shown in FIG. 3, in one blank sheet, the front flap 17 having a strip shape, the top plate 16 having a rectangular plate shape, the rear wall 13, the bottom plate 11, and the front wall 12 are continuously provided in this order. ing. The front flap 17 is continuously provided on the front edge 16F of the top plate 16. As described above, the front edge 16F has a pair of left and right rotating axes 16E, a pair of left and right folding lines B sandwiched between the pair of rotating axes 16E, and a single starting line sandwiched between the pair of folding lines B. It is composed of 16C. As described above, the top plate 16 has a first perforation composed of a pair of first opening lines 1L1 on the left and right and a pair of second opening lines 1L2 on the left and right, and is surrounded by the first perforation. It is composed of one opening portion 161 and a pair of other left and right second opening portions 162. The top plate 16 is connected to the upper edge 13U of the rear wall 13, and the upper edge 13U of the rear wall 13 also serves as the rear edge 16B of the top plate 16. The rear wall 13 is connected to the trailing edge 11B of the bottom plate 11, and the front wall 12 is connected to the front edge 11F of the bottom plate 11.

The outer flap 14F1 is connected to the right edge 16R of the top plate 16, and the outer flap 15F1 is connected to the left edge 16L of the top plate 16. The left and right outer flaps 14F2 and 15F2 are connected to the left and right edges L of the bottom plate 11. The left and right inner flaps 14I2 and 15I2 are connected to the left and right edges L of the rear wall 13, and the left and right inner flaps 14I1 and 15I1 are connected to the left and right edges L of the front wall 12.

Each rotation axis 16E of the front edge 16F, the trailing edge 16B of the top plate 16, the trailing edge 11B of the bottom plate 11, and the front edge 11F of the bottom plate 11 are linear shapes formed by pushing the surface of the blank sheet like the folding line B. It is a groove of. The right edge 16R of the top plate 16, the left edge 16L of the top plate 16, the left and right edges L of the bottom plate 11, the left and right edges L of the rear wall 13, and the left and right edges L of the front wall 12 are also blank sheets. It is a linear groove formed by pushing the surface. The start line 16C, each first opening line 1L1, each second opening line 1L2, and the fourth opening line 16S are linear portions in which notches penetrating the blank sheet are intermittently formed. The upper edge 12U of the front wall 12 includes a pair of left and right notches 12T having a semicircular shape. As described above, the size of the semicircular region defined by each notch 12T is larger than the size of the semicircular region partitioned by the indentation line 17C.

When a packaging box is manufactured from a blank sheet, first, an article such as food is placed on the inner surface of the bottom plate 11, and the front wall 12 and the rear wall 13 are erected with respect to the bottom plate 11. Next, the left and right inner flaps 14I1, 15I1 are bent so as to wrap the article with respect to the front wall 12, and the left and right inner flaps 14I2, 15I2 are bent so as to wrap the article with respect to the rear wall 13. .. Next, the top plate 16 is bent with respect to the rear wall 13 so as to cover the article, and then the left and right outer flaps 14F2 and 15F2 are erected with respect to the bottom plate 11 and left and right with respect to the top plate 16. The outer flaps 14F1 and 15F2 are bent. Next, the front flap 17 is bent so that the front flap 17 and the front wall 12 face each other with respect to the top plate 16. Then, the inner surface of the front flap 17 and the outer surface of the front wall 12 are joined, and the inner surfaces of the left and right outer flaps 14F1, 14F2, 15F1, 15F2 and the outer surfaces of the left and right inner flaps 14I1, 14I2, 15I1, 15I2 are joined. Be joined. As a result, the right wall 14 is formed from the inner flaps 14I1, 14I2 and the outer flaps 14F1, 14F2, the left wall 15 is formed from the inner flaps 15I1, 15I2 and the outer flaps 15F1, 15F2, and the packaging box is sealed. Will be done.

[Action]
Next, the procedure for opening the packaging box will be described.
As shown in FIG. 4, when the packaging box is opened, the area surrounded by the push lines 17C is first pushed into the packaging box by the user's finger. At this time, each push-in line 17C is cut along the push-in line 17C, whereby an insertion hole 17H is formed in the front flap 17. Further, the area surrounded by each push line 17C in the front flap 17 is bent by the folding line B and pushed into the inside of the packaging box through the notch 12T. Then, the user's finger is inserted into the inside of the packaging box through each insertion hole 17H and the notch 12T. Here, the portion touched by the user's finger, that is, the inner edge of the notch 12T in the front wall 12, is covered with the front flap 17 until the start of opening. Therefore, the cleanliness of the parts touched by the user's fingers has been maintained since the packaging box was manufactured, and it is possible to improve the cleanliness at the time of opening compared to the configuration in which these parts are continuously exposed to the outside air. Become.

Then, as shown in FIG. 5, the front edge 16F of the top plate 16 is pulled up from the upper edge of the front wall 12 from the state where the finger is inserted into the inside of the packaging box. At this time, since articles such as food are housed inside the packaging box and continue to press the bottom plate 11 downward, the front edge 16F of the top plate 16 is pulled up, so that the start line 16C is cut and the start line 16C is cut. , Each first opening line 1L1 of the top plate 16 begins to be cut from its front end toward the rear end 1LC. Then, when the entire first opening line 1L1 is cut, the second opening portion 162 is separated from the first opening portion 161.

Then, as shown in FIG. 6, each second opening line 1L2 of the top plate 16 is cut from the front end to the rear end thereof, whereby the first opening portion 161 is separated from the left and right outer flaps 14F1, 15F1. It is divided from. Subsequently, the fourth opening line 16S of the top plate 16 is cut from the rear end to the front end thereof, whereby each second opening portion 162 is separated from the outer flaps 14F1, 15F1 and the front flap 17 It is connected to the chisel via the rotation axis 16E. Therefore, after the fourth opening wire 16S is cut, it is possible to raise each second opening portion 162 with the rotation axis 16E as the rotation axis, thereby opening the entire opening 11T. It will also be possible. As a result, it is possible to expose the article from the entire opening 11T, which makes it easier for the user to grip the article and thus take it out of the packaging box.

As described above, according to the above embodiment, the effects described below can be obtained.
(1) Since the inner edge of the notch 12T in the front wall 12 is covered with the front flap 17 until the packaging box is opened, it is possible to improve the cleanliness at the place where the user's finger or the like touches. ..

(2) After the first opening wire 1L1 is cut, it is possible to raise the second opening portion 162 with the rotation axis 16E of the top plate 16 as the rotation axis, thereby opening the entire opening 11T. It is also possible to do.

(3) Since the size of each notch 12T is larger than the area defined by each push line 17C when viewed from the direction facing the front wall 12, the front wall is cut when each push line 17C is cut by pushing. It is possible to prevent the 12 from hindering the pushing of a finger or the like.

The above embodiment can also be modified and implemented as follows.
[Rotating axis 16E]
The rotation axis 16E can be changed to a perforation. According to the configuration in which the rotation axis 16E is changed to the perforation, the second opening portion 162 can be separated from the front flap 17, so that the opening 11T can be opened more easily. At this time, each rotation axis 16E is an example of the fifth perforation.

[1st perforation]
The first perforation can be embodied into two straight lines or curves connecting a pair of left and right front ends located on the front edge 16F of the top plate 16 and a rear end located on the rear edge 16B of the top plate 16. is there. Further, the first perforation is provided with a pair of left and right front ends located on the front edge 16F of the top plate 16, and is concretely formed in a closed ring in which line segments extending from each front end toward the rear edge 16B of the top plate 16 are connected to each other. It is also possible to make it.

[Front flap 17]
The shape of the front flap 17 is not limited to a strip shape extending in the left-right direction, but is embodied in a semicircular plate shape having the front edge 16F of the top plate 16 as one side and a triangular plate shape having the front edge 16F of the top plate 16 as one side. It is also possible.

When viewed from the direction facing the front wall 12, the area defined by each push line 17C and each notch 12T can have the same size as each other. Further, when viewed from the direction facing the front wall 12, the shape of each push line 17C and the shape of each notch 12T can be different from each other.
-The shape composed of the indentation line 17C and the folding line B is not limited to a semicircular shape when viewed from the direction facing the front wall 12, but can also be a triangular shape or a quadrangular shape, and the folding line B can be formed on one side. It may be a geometric shape configured as.
The number of push wires 17C provided in the front wall 12 can be one, or three or more.

[Packaging box]
-The right wall 14 and the left wall 15 are embodied as a single plate like the front wall 12 and the rear wall 13, and the front wall 12 and the rear wall 13 are inside like the right wall 14 and the left wall 15. It is also possible to make a joint between the flap and the outer flap.

B ... Polygonal line, L ... Edge, 1L1 ... 1st opening line, 1L2 ... Second opening line, 1LC ... Rear end, 11 bottom plate, 11B ... Rear edge, 11F, 16F ... Front edge, 11T ... Opening, 12 ... Front wall , 12T ... notch, 12U, 13U ... upper edge, 13 ... rear wall, 14 ... right wall, 14F1, 14F2, 15F1, 15F2 ... outer flap, 14I1, 14I2, 15I1, 15I2 ... inner flap, 15 ... left wall, 16 ... Top plate, 16B ... Rear edge, 16C ... Start line, 16E ... Rotating axis, 16L ... Left edge, 16R ... Right edge, 16S ... 4th opening line, 17 ... Front flap, 17C ... Push line, 17H ... Insert Holes, 161 ... 1st opening part, 162 ... 2nd opening part.

Claims (3)

It ’s a packaging box,
With the bottom plate
Front, rear, left, and right side walls that surround the bottom plate with an upper edge that partitions the opening facing the bottom plate.
A top plate that is connected to the upper edge of the rear wall, which is one of the side walls, and covers the opening.
A front flap, which is connected to the front edge of the top plate and joined to the outer surface of the front wall, is provided.
The top plate includes first perforations extending from a pair of left and right front ends located on the front edge of the top plate toward the upper edge of the rear wall, and a region surrounded by the first perforations in the top plate. Is the first opening portion for providing the opening.
The front edge of the top plate connects one second perforation and the left and right ends of the second perforation to separate front ends of the first perforation between the pair of front ends of the first perforation. With a pair of folding lines on the left and right,
The fold line continuously connects the top plate and the front flap.
The front flap constitutes a geometric shape with the folding line as one side, and includes a third perforation for forming an insertion hole in the front flap.
The upper edge of the front wall is provided with a notch at a position facing the region to be the insertion hole.
Further provided with outer flaps that are separately connected to the left and right edges of the top plate to form the left and right side walls.
Each of the first perforations has a first portion extending from the pair of front ends to a rear end located in the middle of the left and right edges with an inclination with respect to the left and right edges, and the first portion extending from the rear end of the first portion. It extends toward the upper edge of the rear wall and is composed of a second part that constitutes the left and right edges .
The left and right edges are composed of the second portion and a fourth perforation other than the second portion.
The top plate is a portion of the front edge of the top plate from the end of the front edge to the front end of the first perforation, the first portion, and a pair of left and right sides surrounded by the fourth perforation. It is composed of two opening portions and the first opening portion surrounded by the first perforation.
The portion of the front edge of the top plate from the end of the front edge to the front end of the first perforation is a packaging box that continuously connects the top plate and the front flap. The third perforation is a pair of left and right perforations.
The packaging box according to claim 1, wherein the size of each notch is larger than the region serving as the insertion hole when viewed from the direction facing the front wall. With the bottom plate
Front, rear, left, and right side walls that surround the bottom plate with an upper edge that partitions the opening facing the bottom plate.
A top plate that is connected to the upper edge of the rear wall, which is one of the side walls, and covers the opening.
A front flap that is connected to the outer surface of the front wall and is connected to the front edge of the top plate.
A blank sheet used in the manufacture of packaging boxes
The front flap, the top plate, the rear wall, the bottom plate, and the front wall are connected in this order.
The top plate includes first perforations extending from a pair of left and right front ends located on the front edge of the top plate toward the upper edge of the rear wall, and a region surrounded by the first perforations in the top plate. Is the first opening portion for providing the opening.
The front edge of the top plate connects one second perforation and the left and right ends of the second perforation to separate front ends of the first perforation between the pair of front ends of the first perforation. With a pair of folding lines on the left and right,
The fold line continuously connects the top plate and the front flap.
The front flap constitutes a geometric shape with the folding line as one side, and includes a third perforation for forming an insertion hole in the front flap.
The upper edge of the front wall is provided with a notch at a position facing the region to be the insertion hole.
Further provided with outer flaps that are separately connected to the left and right edges of the top plate to form the left and right side walls.
Each of the first perforations has a first portion extending from the pair of front ends to a rear end located in the middle of the left and right edges with an inclination with respect to the left and right edges, and the first portion extending from the rear end of the first portion. It extends toward the upper edge of the rear wall and is composed of a second part that constitutes the left and right edges .
The left and right edges are composed of the second portion and a fourth perforation other than the second portion.
The top plate is a portion of the front edge of the top plate from the end of the front edge to the front end of the first perforation, the first portion, and a pair of left and right sides surrounded by the fourth perforation. It is composed of two opening portions and the first opening portion surrounded by the first perforation.
The portion of the front edge of the top plate from the end of the front edge to the front end of the first perforation is a blank sheet that continuously connects the top plate and the front flap.

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