JP7087803B2 - Packaging box and blank sheet for the packaging box - Google Patents

Description

The present invention relates to a packaging box and a blank sheet for the packaging box, and more particularly to a packaging box having improved take-out property of the contained article and a blank sheet for the packaging box.

There are many packaging boxes that wrap and store individually wrapped or packed beverage ingredients, confectionery, etc. (hereinafter referred to as goods). Generally, such a packaging box is provided with an outlet having a size substantially equal to that of the article on the top surface. However, when the remaining amount of the articles to be stored is low, the user has to insert his / her finger into the bottom of the packaging box, and depending on the size of the take-out port, the take-out operation may not be performed smoothly.

On the other hand, in Patent Document 1, one side wall of an open flap that can rotate around a hinge forming edge provided on the bottom wall is provided, and by opening the open flap, an outlet is provided on the bottom wall side of the side wall. The configuration to be formed is disclosed. This configuration is considered to facilitate the operation of taking out the articles (particularly the cylindrical pack of biscuits) even when the remaining amount of the stored articles is low.

Japanese Unexamined Patent Publication No. 62-251341

However, even in the configuration of Patent Document 1, only the portion of the side wall provided with the flap is opened, and there is a limit in securing a large take-out port. Further, since the effect of improving the take-out property cannot be realized except for the posture shown in FIG. 2, the posture of the carton box at the time of taking out is limited.

Therefore, the present invention makes it possible to easily take out an article even when the remaining amount is low and to relax the posture condition at the time of taking out by securing a large take-out port. With the goal.

Another object of the present invention is to provide a configuration capable of maintaining good take-out property of the article.

Therefore, in the present invention, the first surface portion and the second surface portion having a rectangular shape facing each other, the third surface portion and the fourth surface portion having a rectangular shape facing each other by connecting the first surface portion and the second surface portion, and the first surface portion thereof. A rectangular parallelepiped packaging box including a face portion and a facing rectangular fifth face portion and a sixth face portion connecting the second face portion and facing each other.
On the first surface portion, a first breaking line that receives a breaking operation for opening a part of the packaging box in the vicinity of the third surface portion extends in the surface of the first surface portion, and the third surface portion. It is provided so as to connect the two corners with respect to the face.
The third surface portion is divided into a portion on the side of the second surface portion and a portion on the side of the first surface portion that can be bent outward from the packaging box with respect to the portion. Has a pair of bent portions bent along the inner surfaces of the fifth surface portion and the sixth surface portion, respectively.
Each of the pair of bent portions is a first portion located on the side of the first surface portion and a second portion located on the side of the second surface portion and adhered to the corresponding fifth surface portion or the sixth surface portion. The first portion and the second portion are connected via a second breaking line that breaks with the bending of the bendable portion.
The first portion has an edge extending away from both the first surface portion and the third surface portion and connecting to the second break line.
It is characterized by that.

Further, the present invention is a blank sheet for forming the above-mentioned packaging box.
The first break line is provided in the region to be the first surface portion, and the first break line is provided.
The region that becomes the bent portion continuously to the third surface portion is located on the side of the first surface portion and the second surface portion, respectively, and becomes the first portion and the second portion. It is partitioned by the second break line and
The region to be the first portion has a portion to be the edge.
It is characterized by that.

Further, in the packaging box, the third surface portion is a lock region forming portion that can rotate around the hinge line, and the first break line is centered on the ridge line between the first surface portion and the third surface portion. A third dimension that engages with a portion that is on the free end side and defines a lock region forming portion having a shape and size that can lock the region when the region is folded onto the third surface portion. A break line can be formed. In this case, the blank sheet may be provided with the third break line in the region to be the third surface portion.

According to the present invention, after the take-out port is formed by breaking the first break line, the first side portion of the third surface portion is bent to secure a larger take-out port, so that even if the remaining amount is reduced. The article can be easily taken out. In addition, the condition of the posture of the packaging box at the time of taking out can be relaxed.

Further, if the lock forming region is provided, the region folded on the third surface portion is prevented from being displaced by the stability, and good take-out property can be maintained.

It is a perspective view which shows the whole structure of the packaging box which concerns on 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 to illustrate the second open portion in the configuration of FIG. (A) to (c) are sectional views for explaining the basic operation of the packaging box of FIG. (A) and (b) are perspective views for explaining an example of the mode of taking out an article from the packaging box of FIG. It is a perspective view for demonstrating the locking part added to the packaging box of FIG. (A) and (b) are perspective views for explaining another example of the mode of taking out an article from the packaging box of FIG. It is a top view of the blank sheet for assembling the packaging box shown in FIG. It is a perspective view which shows the whole structure of the packaging box which concerns on 2nd Embodiment of this invention. (A) and (b) are sectional views for explaining the basic operation of the packaging box of FIG. It is a top view which shows an example of the blank sheet for assembling the packaging box of FIG. FIG. 5 is a plan view showing another example of a blank sheet for assembling the packaging box of FIG. (A) and (b) are perspective views for explaining the structure and operation of the packaging box which concerns on the modification of 2nd Embodiment. 12 is a plan view showing an example of a blank sheet for assembling the packaging box of FIG. 12A.

Hereinafter, the present invention will be described in detail with reference to the drawings. As the material of the packaging box, a single flute double-sided corrugated cardboard base paper can be used, but it is not limited to this, and it is also possible to use a material such as paperboard or plastic that can be used repeatedly multiple times. be. Further, the packaging box according to the present invention is not limited to the object to be packaged and stored. However, articles that have no restrictions on their storage posture (whether top or bottom), such as packed powder, granules, solid or gel beverage ingredients and other foods (coffee, tea, soups, confectionery, etc.) ) Is particularly effective for storage.

1. 1. First Embodiment (Structure)
FIG. 1 is a perspective view showing an external configuration of a packaging box according to a first embodiment of the present invention, and FIG. 2 is along line II-II in FIG. 1 to explain the configuration of a main part of the embodiment. It is a cross-sectional view taken.

In the packaging box of the present embodiment, the rectangular first surface portion 1 and the second surface portion 2 facing each other and the first surface portion 1 and the second surface portion 2 are connected to face each other, and the rectangular third surface portion 3 and the fourth surface portion 4 are opposed to each other. It has a rectangular parallelepiped shape including a rectangular parallelepiped fifth surface portion 5 and a sixth surface portion 6 that connect the first surface portion 1 and the second surface portion 2 and face each other. However, the shape of the packaging box is not limited to the rectangular parallelepiped shape shown in the figure, and may be, for example, a cubic shape in which all surfaces are congruent. Further, FIG. 1 shows a posture in which the first surface portion 1 is the top surface and the second surface portion 2 is the bottom surface. However, as will be described later with respect to FIG. 6, the third surface portion 3 is the top surface and the fourth surface portion 4 is the top surface. It can also be used in a posture that is the bottom surface, and this embodiment can relax the restrictions on the posture when taking out the articles to be accommodated.

In the present embodiment, as will be described later with reference to FIG. 7, the second surface portion 2, the third surface portion 3, the first surface portion 1 and the fourth surface portion 4 are continuously and integrally formed, and the second surface portion 2 and the fourth surface portion 4 are formed integrally. Is connected by an adhesive portion (glue region) 24 provided adjacent to the second surface portion 2. On the other hand, the fifth surface portion 5 and the sixth surface portion 6 are formed by two portions each integrally formed on the side of the first surface portion 1 and the second surface portion 2. That is, the fifth surface portion 5 is formed by abutting the portion 5a on the side of the first surface portion 1 and the portion 5b on the side of the second surface portion 2, and the sixth surface portion 6 is formed with the portion 6a on the side of the first surface portion 1. It is formed by abutting with the portion 6b on the side of the second surface portion 2. Then, for example, an adhesive tape (not shown) can be attached to the butted portions to integrate them.

The first surface portion 1 is provided with a first opening portion 11 that opens a part of the packaging box in the vicinity of the third surface portion 3.

The first open portion 11 extends into the ridge line 13 between the first surface portion 1 and the third surface portion 3 and the surface of the first surface portion 1, and is formed so as to connect the two corner portions with respect to the third surface portion 3. It is partitioned by a break line 11a. In the present embodiment, the first open portion 11 has an isosceles trapezoid with the ridge line 13 between the first surface portion 1 and the second surface portion as the lower base, and the upper base of the isosceles trapezoid and the two hypotenuses ( The portion corresponding to the leg) is the first break line 11a. Further, the portion corresponding to the upper base of the isosceles trapezoid is composed of a curved line having mountain portions at both ends thereof. A fracture start region 11b may be provided so as to face the intermediate valley portion and serve as a starting point when the fracture operation is started. The first break line 11a and the break start region 11b are provided with cuts such as perforations or linear or key-shaped slits for accepting the break operation. The break line 11a may be formed so as to form a straight line or a smooth curve, or may be formed in a zigzag shape having a partially cut. Further, the shape of the first open portion 11 is not limited to the one based on the isosceles trapezoid as shown in FIG. For example, it may be a triangle, a quadrangle, a semicircle or any other appropriate shape, or it may be a basic shape thereof. However, it is preferable to provide the first surface portion 1 and the third surface portion 3 so as to connect the two corner portions, because a large take-out port can be secured.

The third surface portion 3 and the fourth surface portion 4 have a pair of bent portions 30 and 40 extending in a bent state along the inner surfaces of the fifth surface portion 5 and the sixth surface portion 6, respectively. The bent portion 40 is integrally formed and adhered to the inner surfaces of the fifth surface portion 5 and the sixth surface portion 6. On the other hand, regarding the bent portion 30, the first portion 31 located on the side of the first surface portion 1 and the second portion located on the side of the second surface portion 2 and adhered to the corresponding fifth surface portion 5 or the sixth surface portion 6. The portion 32 is separably integrated. The third surface portion 3 is divided into a portion on the side of the first surface portion 1 (hereinafter referred to as the first surface portion side portion) 3a and a portion on the side of the second surface portion 2 (hereinafter referred to as the second surface portion side portion) 3b. Has been done. Then, as will be described later, the first surface portion side portion 3a can be bent outward with respect to the second surface portion side portion 3b using the bending line 3c as a hinge. The bent portion 30 is connected via a second breaking line 33 having a slit or the like so that the first portion 31 and the second portion 32 can be easily separated by the bending operation. It is composed of.

Even if the bending line 3c is formed as an actual bending line such as a continuous grid line or an intermittent slit processed on the outer surface or the inner surface of the third surface portion 3 in order to facilitate the bending operation. good. However, if corrugated cardboard is used as the material of the packaging box and the portion where the bending line 3c is formed coincides with the extending direction of the flute, it does not necessarily have to be manifested.

The first portion 31 has an edge 31a and an edge 31b connected to the third surface portion 3. The edge 31b extends away from both the first surface portion 1 and the third surface portion 3 and connects to the second break line. In the present embodiment, the edge 31b has an arcuate edge portion 31b1 having a radius of curvature equal to the length h of the edge edge 31a, and a linear edge portion 31b2 extending tangentially from the arcuate edge portion 31b1. There is. Hereinafter, the first surface portion side portion 3a and the first portion 31 may be collectively referred to as a second open portion. The central angle of the arcuate edge portion 31b1 can be appropriately determined depending on how much the first portion 31 is bent with respect to the second portion 32, that is, how much the open area formed by the second open portion is. .. In the embodiment shown in FIGS. 1 and 2, the central angle is set to approximately 90 degrees, and the arcuate edge portion 31b1 forms an arc of a quarter circle.

(Opening operation of the packaging box)
The opening operation of the packaging box according to the present embodiment will be described with reference to FIGS. 3 (a) to 3 (c), FIGS. 4 (a) and 4 (b). In the present embodiment, the first and second opening portions are used to obtain a two-stage opened state.

First, at the time of initial use of the packaging box (at the time of taking out the article P), the first breaking line 11a is broken and a part of the packaging box, that is, the first opening portion 11 is opened to open the first opening. Obtain the state (FIG. 3 (a), FIG. 4 (a)). At this time, the outer portion of the hypotenuse of the first open portion having an isosceles trapezoidal shape remains on the first surface portion 1.

When some articles P are taken out and it becomes difficult to take out the articles P in the first opened state, an operation of bending the first surface portion side portion 3a outward is performed by using the bending line 3c as a hinge line. Along with this operation, the second breaking line 33 is broken and the first portion 31 and the second portion 32 are separated. The arc-shaped edge portion 31b1 has a radius of curvature equal to the length h of the edge edge 31a, and the arc-shaped edge portion 31b1 of the first portion 31 does not interfere with the inner surface of the first surface portion 1 during the bending operation. The operation is performed smoothly (FIG. 3 (b)). When the bending operation is further continued, the linear edge portion 31b2 abuts on the inner surface of the first surface portion 1 on the outside of the hypotenuse of the isosceles trapezoid shown in FIG. 1, further bending operation is prevented, and the second bending operation is prevented. (FIG. 3 (c), FIG. 4 (b)).

In order to maintain this second opened state, a foldable locking portion can be added to at least one of the fifth surface portion 5 and the sixth surface portion 6. .. FIG. 5 shows an example in which the locking portion 51 is provided on the fifth surface portion 5, and after obtaining the second opened state, the locking portion 51 is bent so as to interfere with the first portion 31 and the first surface portion side portion 3a. It is possible to prevent the narrowing of the take-out port due to the restoration of the.

Further, in the above description, after the first opened state (FIGS. 3 (a) and 4 (a)), the second opened state (FIG. 3 (c)) when the remaining amount of the article P is low. ), FIG. 4 (b)) is obtained, but the method of opening is arbitrary by the user, and it goes without saying that the first and second opening operations can be performed at the initial start of use. In any case, according to the present embodiment, as is clear from the comparison between FIGS. 4 (a) and 4 (b), the packaging box is greatly opened in the second opened state, and therefore the remaining amount of the article is left. Even if P is reduced, sufficient take-out property can be ensured.

Further, the packaging box of the present embodiment can be used in a posture in which the third surface portion 3 is the top surface and the fourth surface portion 4 is the bottom surface. That is, by performing the opening operation of the first opening portion 11 and the bending operation of the first surface portion side portion 3a in the same manner as described above, the first opened state shown in FIG. 6 (a) and the first opened state shown in FIG. 6 (b) are performed. The opened state of 2 can be obtained. As described above, in the present embodiment, the posture at the time of taking out the housed article is not limited, and the taking out in two postures is permitted.

(Blank sheet)
FIG. 7 is a plan view of a blank sheet for assembling the packaging box according to the embodiment shown in FIG. 1, and each region in the blank sheet is underlined with a reference numeral corresponding to each of the above-mentioned surface portions or bent portions. It is shown with. In FIG. 7, the solid line indicates the outer shape of the blank sheet, and the discontinuous solid line indicates the break lines 11a and 33. Further, the broken line indicates a bending line, and a stake line processing is performed to facilitate bending. However, as described above, whether or not to apply a manifested bending line for the bending line 3c indicated by the alternate long and short dash line. Is optional.

In the blank sheet of FIG. 7, the regions to be the second surface portion 2, the third surface portion 3, the first surface portion 1 and the fourth surface portion 4 are continuously and integrally formed, and the margin region 24 is formed in the region to be the second surface portion 2. Is added. The region to be the fifth surface portion 5 and the sixth surface portion 6 is formed by two portions (51a and 51b; 61a and 61b) integrally formed on the side of the region to be the first surface portion 1 and the second surface portion 2. Will be done.

The blank sheet shown is primarily used to form the packaging box of FIG.
A region to be the first open portion 11 is provided in the region to be the first surface portion 1 by being partitioned by a bending line 13 to be a ridge line 13 with the second surface portion 3 and a first breaking line 11a.
The region that becomes the bent portion 30 continuously to the third surface portion 3 is located on the side of the first surface portion 1 and the second surface portion 2, respectively, and becomes a region that becomes the first portion 31 and a region that becomes the second portion 32. , Being connected via the second break line 33,
The region to be the first portion 31 has a portion 31b1 extending non-parallel to the edge 31a from the corner portion of the region to be the first surface portion 1 and is a portion to be an edge 31b connected to the second break line 33. Have,
Is a characteristic configuration.

(Variation example of the first embodiment)
The present invention is not limited to the above-described embodiments and modifications described elsewhere. For example, in the above-described embodiment, the combination of the first open portion 11 provided on the first surface portion 1 and the second open portion provided on the third surface portion 3 (these are collectively referred to as an open portion) has been described. However, in addition to this, another opening can be provided. For example, an open portion extending from the first surface portion 1 to the fourth surface portion 4 may be further provided. In this case, the first surface portion 1 and the fourth surface portion 4 are first and second, respectively, so as to be line-symmetrical with respect to the center line 15 in the longitudinal direction of the blank sheet attached to the region to be the first surface portion 1 in FIG. An open portion may be provided. Alternatively, an open portion may be provided so as to extend from the second surface portion 2 to the fourth surface portion 4. In this case, for example, the region to be the third surface portion 3, the first surface portion 1, the fourth surface portion 4, the second surface portion 2 and the margin region 24 are continuously and integrally formed in this order, and the opening described in the embodiment is described. An open portion extending from the second surface portion 2 to the fourth surface portion 4 may be provided so as to be subject to rotation by 180 degrees with the portion.

Further, in the above-described embodiment, the first portion has an arcuate edge portion 31b1 having a function of allowing the bending operation of the first surface portion side portion 3a and a linear edge portion 31b2 having a function of limiting the bending range. 31 has been described. However, if each function can be fulfilled, the shape of the edge portion thereof can be appropriately determined. Further, if it is not necessary to limit the bending range, the linear edge portion 31b2 is unnecessary, so that it is not necessary to form the first open portion 11 so that a portion where interference with the linear edge portion 31b2 remains.

2. 2. 2nd Embodiment FIG. 8 is a perspective view which shows the appearance structure of the packaging box which concerns on 2nd Embodiment of this invention, the part which was configured like the embodiment of FIG. 1 and the part which performs the same function. The same reference numerals are given to the corresponding parts. In the embodiment of FIG. 8, a first open portion 111 having an isosceles trapezoidal shape having a larger dimension in the height direction than the first open portion 11 of the first embodiment is formed on the first surface portion 1. On the other hand, the third surface portion 3 is provided with a lock region forming portion 137 for locking the first open portion 111 and maintaining the open state.

The lock region forming portion 137 of the present embodiment has a portion that is located on the bending line 3c and becomes a hinge line, and a third breaking line 135 that is formed convexly from the portion to the side of the second surface portion side portion 3b. Defined by. The third break line 135 is a portion of the region defined by the first break line 11a, that is, the tip end side portion of the first open portion 111 in the direction toward the fourth surface portion 4 (the portion that becomes the free end side when the first break line 11a is broken). ), And has a shape and dimensions that can lock the first open portion 111 by engaging with at least a part of the tip end side portion thereof. That is, the lock region forming portion 137 can rotate inward of the packaging box around the hinge wire portion on the bending line 3c when the third breaking line 135 is broken, whereby the first opening portion 111 The tip side part of the is acceptable. Then, in this receiving state, the inner edge of the opening formed by the break of the third break line 135 engages with the outer edge of the tip end side portion of the first open portion 111.

The opening operation of the packaging box according to the present embodiment will be described with reference to FIGS. 8 and 9 (a) and 9 (b). During the initial use of the packaging box (when the article is taken out), the lock region forming portion 137 defined by the third break line 135 is pushed in the direction of the arrow P to break the third break line 135 to form the lock region. Push the part 137 inward of the storage box. Then, the operation of breaking the first breaking line 11a to open the first opening portion 111 is performed, the first opening portion 111 is rotated, and the tip end side portion is positioned inside the opening of the lock region forming portion 137 formed by the breaking. Let me. This is the first opened state of the present embodiment (FIG. 9A), and at this time, the stability of the first opening portion 111 prevents the tip end side portion from coming off the opening.

When some articles are taken out and it becomes difficult to take out the articles in the first opened state, the bending line 3c is used as a hinge line and the first surface side portion 3a is bent outward as in the first embodiment. By performing the operation of making the hinge, a second opened state is obtained through the same operation as that of the embodiment of FIG. 1 (FIG. 9 (b)). At this time, the tip portion of the first opening portion 111 is still held inside the packaging box, and the tip end side portion of the first opening portion 111 is prevented from coming off from the opening.

In addition to obtaining the same effect as that of the embodiment of FIG. 1, the embodiment of FIG. 8 also prevents the displacement of the first opening portion 111 due to the stability. Therefore, the first opening portion 111 does not get in the way, and good take-out of the article is maintained.

FIG. 10 is a plan view of a blank sheet for assembling the packaging box according to the embodiment shown in FIG. 8, and each region in the blank sheet corresponds to each surface portion or a bent portion as in FIG. 7. The symbols are underlined. A third break line 135 is added to the blank sheet of FIG. That is, the illustrated blank sheet is characterized in that the third break line 135 is formed in addition to the characteristic configuration similar to that of the blank sheet of FIG. If these conditions are satisfied, the shape of the blank sheet can be appropriately selected, and may be, for example, the shape shown in FIG.

In the embodiment of FIG. 8, the lock region forming portion 137 that is convex is provided on the side of the second surface portion side portion 3b of the third surface portion 3, but as shown in FIG. 12A, the first surface portion side portion 3a is provided. A lock region forming portion 37 that is convex on the side may be provided. The lock region forming portion 37 of this example is defined by a hinge line portion aligned with the bent portion 3c and a third breaking line 35 forming a convex portion having a width larger than that of the hinge line portion. There is.

During the initial use of the packaging box, the lock region forming portion 37 is pushed in the direction of the arrow P to break the third breaking line 35 and pull out the lock region forming portion 37 to the outside of the storage box. Then, the operation of breaking the first breaking line 11a to open the first opening portion 11 is performed, the first opening portion 11 is rotated, and the tip end side portion is engaged with the base portion of the lock region forming portion 37 along the hinge line. By doing so, the first opened state as shown in FIG. 12 (b) is obtained. Although not shown, if the operation as described with reference to FIG. 4B is performed, a second opened state can be obtained while holding the tip end side portion of the first opening portion 11 at the base portion of the lock region forming portion 37. Can be done. Also in this example, as in the second embodiment, the first opening portion 11 does not get in the way, and good take-out of the article is maintained.

FIG. 13 is a plan view of an example of a blank sheet for assembling the packaging box shown in FIG. 12 (a). This blank sheet has the same configuration as that of FIG. 7 except that the third break line 35 is added.

The position of the hinge line at the center of rotation of the lock region forming portion 137 or 37 does not have to coincide with the bending line 3c, and the bending line corresponds to the length of the first opening portion 111 or 11. It may be present at a position other than 3c. However, considering the additional man-hours for providing a dedicated hinge wire for smooth displacement of the lock portion, it is preferable to match the lock portion with the bent portion 3c. Further, the shape and dimensions of the lock region forming portion 137 or 37 are not limited to the example of FIG. 8 or FIG. 12A, and the engagement with the tip end side portion of the first opening portion 111 or 11 is ensured. Of course, if there is, it can be arbitrarily determined.

1 to 6 1st to 6th surface parts 3a 1st surface part side part 3b 2nd surface part side part 3c Bending line 11, 111 1st open part 11a 1st breaking line 30 Bending part 31 1st part 31a, 31b edge of bending part 31b1 Arc-shaped edge 31b2 Straight edge 33 Second break line 35, 135 Third break line 37, 137 Lock area forming part

Claims (11)

The rectangular first and second surface portions facing each other, the first surface portion and the second surface portion connected to each other, and the facing rectangular third surface portion and the fourth surface portion, and the first surface portion and the second surface portion are formed. A rectangular parallelepiped corrugated cardboard packaging box including the fifth and sixth sides of a rectangular parallelepiped that are connected and opposed to each other.
On the first surface portion, a first breaking line that receives a breaking operation for opening a part of the packaging box in the vicinity of the third surface portion extends in the surface of the first surface portion, and the third surface portion. It is provided so as to connect the two corners with respect to the face.
The third surface portion is divided into a portion on the side of the second surface portion and a portion on the side of the first surface portion that can be bent outward from the packaging box with respect to the portion. Has a pair of bent portions bent along the inner surfaces of the fifth surface portion and the sixth surface portion, respectively.
Each of the pair of bent portions is a first portion located on the side of the first surface portion and a second portion located on the side of the second surface portion and adhered to the corresponding fifth surface portion or the sixth surface portion. The first portion and the second portion are connected via a second breaking line that breaks with the bending of the bendable portion.
The first portion has an edge extending away from both the first surface portion and the third surface portion and connecting to the second break line.
A packaging box characterized by that. The first opened state is obtained by the operation of breaking the first breaking line and opening a part of the packaging box, and the second opened state is obtained by the operation of bending the bendable portion. It is possible to get and
The second breaking line is formed so as to be broken by the bending operation, and the first part is bent outward of the packaging box together with the bendable portion by the breaking. Is acceptable,
The packaging box according to claim 1. The packaging box according to claim 2, wherein the edge portion is connected to the first portion and has a first edge portion that allows the bending without interfering with the inner surface of the first surface portion. The edge portion is further provided so as to be continuously connected to the second breaking line from the first edge portion, and has a second edge portion that abuts on the inner surface of the first surface portion to limit the bending. The packaging box according to claim 3, wherein the packaging box is characterized in that. The packaging box according to claim 4, wherein the first edge portion is an arcuate edge portion. The packaging box according to claim 5, wherein the second edge portion is a linear edge portion extending tangentially from the arcuate edge portion. It is characterized in that at least one of the fifth surface portion and the sixth surface portion is provided with a locking portion which is formed to be bendable inward of the packaging box and interferes with the first portion by the bending. The packaging box according to any one of claims 1 to 6. A blank sheet for forming the packaging box according to any one of claims 1 to 7.
The first break line is provided in the region to be the first surface portion, and the first break line is provided.
The region that becomes the bent portion continuously to the third surface portion is located on the side of the first surface portion and the second surface portion, respectively, and becomes the first portion and the second portion. It is partitioned by the second break line and
The region to be the first portion has a portion to be the edge.
A blank sheet characterized by that. The third surface portion is a lock region forming portion that can rotate around the hinge line, and a region defined by the first break line about the ridge line between the first surface portion and the third surface portion is the first. A third break line is formed to define the lock region forming portion having a shape and size that can lock the region by engaging with the portion on the free end side when folded on the three surface portions. The packaging box according to any one of claims 1 to 7, wherein the packaging box is provided. In the lock region forming portion, the hinge line is located on a bending line that becomes a rotation center when bending the bendable portion, and the third breaking line is on the side of the portion on the side of the second surface portion. The packaging box according to claim 9, wherein the free end side portion can be received in the opening formed by the breakage of the third break line. A blank sheet for forming the packaging box according to claim 9 or 10.
The first break line is provided in the region to be the first surface portion, and the first break line is provided.
The region that becomes the bent portion continuously to the third surface portion is located on the side of the first surface portion and the second surface portion, respectively, and becomes the first portion and the second portion. It is partitioned by the second break line and
The region to be the first portion has a portion to be the edge.
The third break line is provided in the region to be the third surface portion.
A blank sheet characterized by that.

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