JP7286411B2 - Sealing structure for packaging boxes and packages - Google Patents

Description

TECHNICAL FIELD The present invention relates to a structure for sealing a packaging box and a packaging body that can be opened and closed.

The sealed container described in Patent Document 1 has four side surfaces and a bottom surface forming a quadrangular prism shape, a first extension part connected to the upper end of the first side surface, and the inner surface of the upper end of the first extension part. a second extension connected to the upper end of a second side surface facing the first side; and a third extension connected to the upper end of the second extension. , was provided. The first extension had a cut below the engagement shoulder. The distal end of the third extension was provided with an outwardly bent end with an elastic crease. To seal the sealed container, the first extension and the second extension are bent in a direction toward each other while inserting the third extension under the first extension, and the first extension is bent. The bent end is engaged with the engaging stepped portion on the back surface of the portion. In order to open this sealed container, the notch is pushed down to disengage the bent end from the engaging stepped portion.

Japanese Utility Model Publication No. 45-21222

However, in the above-described sealed container, the bent end must be engaged with the engaging stepped portion on the back surface of the first extension portion that is not visible to the operator, so the sealed container cannot be easily sealed. . In addition, in order to separate the bent end from the engaging stepped portion, a notch must be provided in the visible first extension portion, which deteriorates the design of the sealed container.

In order to solve the above problems, the present invention provides a sealing structure for a packaging box and a package that can be easily opened and closed.

In order to achieve the above object, the packaging box of the present invention comprises a pair of first extension walls arranged to face each other in a first direction, and a pair of first extension walls arranged to face each other in a second direction orthogonal to the first direction. and a second extension wall connected to the first extension wall via an extension folding line and connected to the second extension wall via an inclined folding line extending obliquely with respect to the extension folding line Locking folding lines are formed on the four connecting walls provided, and the tips of the pair of connecting walls located on the side of one of the first extension walls, or the tips of the pair of connecting walls located diagonally. and a pair of locking pieces continuously provided via the first extension wall and the second extension wall slanted inward, the connection wall being mountain-folded along the extension folding line, and the slanted In the sealed state in which it is valley-folded along the folding line and folded between the first extension wall and the second extension wall, the locking piece is valley-folded along the locking folding line and is opposite the first extension wall. It is inserted into an insertion opening formed between the extension wall and the connecting wall, and pressed from the inside against the mountain-folded extension folding line to maintain the sealed state.

Further, in order to achieve the above object, the packaging box of the present invention comprises a box body formed in a cylindrical shape by alternately connecting a pair of first side walls and a pair of second side walls, and a pair of the above-mentioned second side walls. A pair of first extension walls connected to one end of one side wall, a pair of second extension walls connected to one end of the pair of second side walls, the first side wall and the second side wall The second extension wall is connected to the first extension wall via an extension folding line extending along the boundary line of the second extension wall via an inclined folding line extending obliquely from one end of the boundary line four connecting walls connected to each other, and the tip of the pair of connecting walls located on the side of one of the first extension walls, or the tip of the pair of connecting walls located diagonally. and a pair of locking pieces connected via a curved line, wherein the first extension wall and the second extension wall are bent inward and inclined, and the connection wall is mountain-folded along the extension folding line. , and in the sealed state in which it is valley-folded along the inclined folding line and folded between the first extension wall and the second extension wall, the locking piece is valley-folded along the locking folding line and faces It is inserted into an insertion opening formed between the first extension wall and the connection wall, and is pressed from the inside against the extension folding line that is mountain-folded to maintain the sealed state.

In this case, a pair of gripping pieces connected to the leading end portions of the pair of first extension walls via tip folding lines is provided, and in the sealed state, the pair of gripping strips are valley-folded at the tip folding lines. preferably overlapped.

In this case, the distal end portion of the connecting wall to which the locking piece is connected is formed parallel to the base end portion of the second extension wall, and the locking piece extends at least from the distal end portion of the connecting wall. It is preferable to connect to the first extension wall side.

In this case, the tip end portions of the pair of inclined folding lines formed between the second extension wall and the pair of connecting walls coincide with each other on the base end side of the locking folding line to form apexes. The leading end of the connecting wall forming the insertion port is inclined from the leading end of the extended folding line toward the apex of the inclined folding line toward the base end side, and in the sealed state, the engaging wall is inclined. It is preferable that the contact is along the surface of the connecting wall where the strips are arranged.

Further, in order to achieve the above object, the present invention provides a pair of first extension walls arranged to face each other in a first direction and a pair of first extension walls arranged to face each other in a second direction orthogonal to the first direction. a second extension wall, connected to the first extension wall via an extension folding line and connected to the second extension wall via an inclined folding line extending obliquely with respect to the extension folding line; The sealing structure of the package, comprising: four connecting walls arranged at the ends of the pair of connecting walls positioned on the side of one of the first extension walls, or the pair of connecting walls positioned diagonally A pair of locking pieces are continuously provided at the tip of the connecting wall via a locking folding line, the first extension wall and the second extension wall are inclined inward, and the connection wall In a sealed state in which the folding is folded between the first extension wall and the second extension wall after being mountain-folded along the extension folding line and valley-folding along the slanted folding line, the locking piece is folded into the locking folding line. It is valley-folded along a curve, is inserted into an insertion opening formed between the first extension wall and the connecting wall facing each other, and is pressed from the inside against the mountain-folded extension folding line to maintain the sealed state. do.

According to the present invention, the packaging box can be easily opened and closed.

It is a perspective view showing a packaging box concerning a 1st embodiment of the present invention. 1 is a plan view showing a blank of a packaging box according to a first embodiment of the present invention; FIG. It is a perspective view which shows the state which formed the box main body of the packaging box which concerns on 1st Embodiment of this invention. FIG. 4 is a perspective view showing a process of closing the upper surface of the box body of the packaging box according to the first embodiment of the present invention; FIG. 4 is a perspective view showing a locking piece inserted into a receptacle by cutting out a part of a first extension wall in the packaging box according to the first embodiment of the present invention. It is a perspective view which shows the packaging box based on the 1st modification of 1st Embodiment of this invention. It is a perspective view which shows the packaging box based on the 2nd modification of 1st Embodiment of this invention. FIG. 11 is a plan view showing a blank of a packaging box according to a third modified example of the first embodiment of the present invention; It is a perspective view showing a packaging box concerning a 2nd embodiment of the present invention. FIG. 5 is a plan view showing a blank of a packaging box according to a second embodiment of the present invention;

Embodiments of the present invention will be described below with reference to the accompanying drawings. In each figure, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates "Upper" is indicated and "D" indicates "Lower". Also, these directional terms are used for convenience of explanation and do not limit the technical scope of the present invention.

[First Embodiment: Outline of Packaging Box]
A packaging box 1 according to a first embodiment will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing a packaging box 1. FIG. FIG. 2 is a plan view showing the blank 5 of the packaging box 1. FIG.

As shown in FIG. 1, the packaging box 1 is a gable-top paper container having a gabled roof structure on the top of a box body 1A in the shape of a rectangular tube extending in the vertical direction.

The packaging box 1 is assembled from blanks 5 shown in FIG. The blank 5 is formed by punching out a sheet of cardboard (cardboard) with a die or the like. In addition, FIG. 2 shows the front side, "X" shown in FIG. is shown. Further, in this specification, terms indicating up/down, left/right, front/rear, and similar directions refer to directions in the assembled state of the packaging box 1 (assembled state).

[Packaging box blank]
The blank 5 of the packaging box 1 will be described with reference to FIG. The blank 5 includes a pair of first side walls 10, a pair of second side walls 11, a pair of lower inner flaps 12, a pair of lower outer flaps 13, a pair of first extension walls 14, and a pair of gripping pieces 15. , a pair of second extension walls 16 , four connection walls 17 , and a pair of locking pieces 18 .

<First side wall, second side wall>
The pair of first side walls 10 and the pair of second side walls 11 are alternately arranged side by side in the grain direction and connected via the vertical folding line L1. The first side wall 10 and the second side wall 11 are formed in a substantially rectangular shape with substantially the same size. Specifically, the first side wall 10 and the second side wall 11 are formed in a substantially rectangular shape with the length in the orthogonal direction (vertical direction) longer than the width in the grain direction. A body extension piece 20 is connected to the first side wall 10 positioned at the outer end in the grain direction via a longitudinal fold line L1. The body passage piece 20 is formed in a substantially trapezoidal shape whose width gradually narrows from the base end (on the side of the vertical folding line L1) toward the tip end.

<Lower inner flap>
The pair of lower inner flaps 12 are connected to the lower end portions of the pair of second side walls 11 via a lower horizontal folding curve L2. The lower inner flap 12 is formed in a substantially trapezoidal shape whose width gradually narrows from the base end (the side of the lower lateral bending curve L2) toward the tip end. The dimension (extending dimension) of the lower inner flap 12 in the orthogonal direction is set to approximately half the dimension of the second side wall 11 in the grain direction.

<Lower outer flap>
The pair of lower outer flaps 13 are connected to the lower end portions of the pair of first side walls 10 via the lower lateral bending curve L2. The lower outer flap 13 is formed in a substantially rectangular shape, and its orthogonal dimension (extending dimension) is set longer than the extending dimension of the lower inner flap 12 . An interlocking concave portion 22 is notched from the distal end to the proximal end in the intermediate portion in the orthogonal direction of the lower outer flap 13 . The lower outer flap 13 is formed with a bottom folding line L3 extending obliquely from the engagement recess 22 toward the second side wall 11 side.

<First extension wall>
The pair of first extension walls 14 are connected to the upper end portions (one end portions in the orthogonal direction) of the pair of first side walls 10 via an upper lateral bending line L4. The first extension wall 14 is formed in a substantially rectangular shape, and its dimension in the orthogonal direction (extension dimension) is set slightly shorter than the extension dimension of the lower outer flap 13 . A roof extension piece 21 is connected to the first extension wall 14 on the main body extension piece 20 side via an extension folding line L6. The roof extension piece 21 is formed in a substantially trapezoidal shape whose width gradually narrows from the base end to the tip end. Incidentally, the roof patch piece 21 is formed obliquely with an auxiliary folding line L9 that coincides with a later-described inclined folding line L7 in the assembled state.

<picked piece>
The pair of picking pieces 15 are connected to the leading ends of the pair of first extension walls 14 via the leading edge bending lines L5. The grip piece 15 is formed in a substantially rectangular shape, and its dimension in the orthogonal direction (extending dimension) is set to ⅓ or less of the extending dimension of the first extension wall 14 .

<Second extension wall>
The pair of second extension walls 16 are connected to the upper end portions of the pair of second side walls 11 via an upper lateral bending line L4. The second extension wall 16 is formed in the shape of an isosceles triangle whose base is the upper horizontal folding curve L4. The dimension of the second extension wall 16 in the orthogonal direction (the distance from the upper horizontal folding curve L4 to the vertex V) is set slightly shorter than the extension dimension of the lower inner flap 12 .

<Connecting wall>
The four connecting walls 17 are connected to the first extension wall 14 via an extension folding line L6 and connected to the second extension wall 16 via an inclined folding line L7. The extended folding line L6 extends along the vertical folding line L1 (the boundary line between the first side wall 10 and the second side wall 11). The inclined folding line L7 extends obliquely from the upper end (one end) of the vertical folding line L1 to the extended folding line L6. In other words, the inclined folding line L7 corresponds to the oblique side of the second extension wall 16 forming a triangle. The leading ends of the pair of inclined folding lines L7 formed between the second extension wall 16 and the pair of connecting walls 17 coincide with each other on the base end side (lower side) than the latching folding line L8, which will be described later. form a vertex V. More precisely, in the state of the blank 5 , the connection wall 17 located on the opposite side of the roof extension piece 21 is not connected to the first extension wall 14 . The connection wall 17 is connected to the first extension wall 14 via the roof extension piece 21 when the packaging box 1 is put into an assembled state.

In the state of the blank 5, the two connecting walls 17 connected to both ends of one first extension wall 14 in the paper grain direction are formed in a substantially trapezoidal shape that is symmetrical about the first extension wall 14. ing. On the other hand, in the state of the blank 5 , the other two connecting walls 17 excluding the two trapezoidal connecting walls 17 are formed in substantially triangular shapes that are symmetrical about the first extension wall 14 . In the following description, for the sake of convenience, the connecting wall 17 having a trapezoidal shape will be referred to as a "first connecting wall 17A", and the connecting wall 17 having a triangular shape will be referred to as a "second connecting wall 17B". and the second connecting wall 17B will simply be referred to as the "connecting wall 17".

The tip portion (one side of the upper end) of the first connecting wall 17A is formed parallel to the upper horizontal folding line L4 (the base end portion of the second extension wall 16). It should be noted that "the leading edge of the connecting wall 17 is parallel to the upper lateral bending curve L4" means not only perfect parallelism, but also an inclination of a margin of error is allowed.

On the other hand, the tip portion (one side of the upper end) of the second connecting wall 17B is inclined from the tip of the extension folding line L6 toward the vertex V of the inclined folding line L7 (the second extension wall 16) toward the base end side (downward). ing. That is, a substantially triangular cutout portion 23 is formed in the upper portion of the second connecting wall 17B, and the tip of the second connecting wall 17B is located on the vertex V at the tip of the first connecting wall 17A. It is one step lower than the department.

<Locking piece>
A pair of locking pieces 18 are the main part of the sealing structure of the packaging box 1 . The pair of locking pieces 18 are attached to the distal ends (upper ends) of the pair of first connecting walls 17A (the pair of connecting walls 17 positioned on the side of one of the first extension walls 14) via the locking bent line L8. are connected. The locking piece 18 is formed in a substantially rectangular shape, and its orthogonal dimension (extension dimension) is set to be the same as the extension dimension of the knob piece 15 . In addition, the grain direction end of the locking piece 18 adjacent to the pick piece 15 is slightly displaced toward the vertex V from the extended folding line L6.

The vertical folding curve L1, the lower horizontal folding curve L2, the upper horizontal folding curve L4, the leading edge folding line L5, and the extension folding line L6 are general-purpose ruled lines linearly recessed from the surface of the paperboard. General purpose creases are provided for folding the paperboard so that the back (or face) faces inward. The bottom folding line L3, the inclined folding line L7, the locking folding line L8, and the auxiliary folding line L9 are lead creases in which a plurality of cuts are formed at predetermined intervals on the general-purpose crease. The lead crease is provided for folding (valley folding) the paperboard so that the surface faces inward. These folding lines L1 to L8 are not limited to general-purpose ruled lines, lead ruled lines, and the like, and may be any lines for folding paperboard, such as perforation blade lines.

[Assembling and sealing the packaging box]
Next, the procedure for assembling and sealing the packaging box 1 will be described with reference to FIGS. 1, 3 to 5. FIG. FIG. 3 is a perspective view showing a state in which the box body 1A is formed. FIG. 4 is a perspective view showing the process of closing the upper surface of the box body 1A. FIG. 5 is a perspective view showing the locking piece 18 inserted into the insertion opening 24 by cutting a part of the first extension wall 14. As shown in FIG.

Although illustration is omitted, it is assumed that the packaging box 1 before assembly is folded substantially flat. Specifically, in the blank 5 (see FIG. 2), the first side wall 10 and the second side wall 11 on both sides in the grain direction are folded inward along the vertical folding line L1, and the back surface (inner surface) of the folded second side wall 11 ) is adhered to the body passage piece 20 . Also, a roof extension piece 21 is adhered to the back surface of the connection wall 17 on the opposite side, and the connection wall 17 is connected to the first extension wall 14 via the roof extension piece 21 . As a result, the pair of first side walls 10 and the pair of second side walls 11 are alternately connected to form a box body 1A in the shape of a flattened rectangular tube. Further, the corner portion of the lower outer flap 13 defined by the bottom folding curve L3 is adhered to the surface (outer surface) of the lower inner flap 12 . Further, the lower inner flap 12 is mountain-folded along the lower horizontal folding curve L2, and the lower outer flap 13 is mountain-folded along the lower horizontal folding curve L2 while being valley-folded along the bottom folding curve L3. and are placed inside the box body 1A. As a result, the packaging box 1 is folded substantially flat.

As shown in FIG. 3, the worker folds the first side wall 10 and the second side wall 11 along the vertical folding line L1 so that they are perpendicular to each other. The pair of first side walls 10 are arranged to face each other in the front-rear direction (first direction), and the pair of second side walls 11 are arranged to face each other in the left-right direction (second direction orthogonal to the first direction). By raising the folded packaging box 1 in this manner, the box main body 1A having a substantially rectangular tubular shape is formed.

The bottom surface of the packaging box 1 is a so-called one-touch bottom that is formed in conjunction with the box main body 1A that deforms into a square tube shape. That is, in the process of forming the box body 1A in the shape of a rectangular tube, the lower inner flap 12 and the lower outer flap 13 are pushed outward (downward) from the inside of the box body 1A, and the lower outer flap 13 is formed along the bottom folding line L3. It starts to return flat from the folded state (not shown). When the pair of lower outer flaps 13 are flattened, the engagement recesses 22 are engaged with each other (not shown). As described above, the lower inner flap 12 and the lower outer flap 13 close the opening of the lower surface of the box body 1A, thereby forming the bottom surface of the packaging box 1 (not shown). Then, the worker puts an article (not shown) inside the box body 1A.

Next, as shown in FIG. 4, the worker inclines the pair of first extension walls 14 and the pair of second extension walls 16 inward to form a gable roof on the upper portion of the box body 1A.

Specifically, the operator pushes the pair of second extension walls 16 inward. As a result, the second extension wall 16 is inclined inwardly by being valley-folded along the pair of inclined folding lines L7 and mountain-folding along the upper lateral folding line L4. The first extension wall 14 is pulled by the second extension wall 16 falling inward, and is inclined inward by being mountain-folded along the extension folding line L6 and being mountain-folded along the upper lateral folding line L4. In addition, in the process in which the first extension wall 14 and the second extension wall 16 are inclined inward, the connection wall 17 is mountain-folded along the extension folding line L6 and valley-folded along the inclination folding line L7 to form the first extension wall. 14 and the second extension wall 16. As shown in FIG. The first extension wall 14 and the second connection wall 17B are bent to form an insertion port 24 so as to approach each other. The insertion port 24 is a substantially triangular gap formed between the first extension wall 14 and the connecting wall 17 facing each other at a predetermined angle. During the process of folding the connecting wall 17, the operator can see the insertion opening 24 from above.

Next, the operator folds the pair of locking pieces 18 along the locking folding lines L8 and inserts the pair of locking pieces 18 into the pair of insertion openings 24 while visually checking. While inserting the locking piece 18 into the insertion opening 24, the operator matches the tips of the pair of first extension walls 14 to overlap the pair of gripping pieces 15 that are valley-folded along the tip folding lines L5. As described above, the first extension wall 14, the second extension wall 16, and the like close the top opening of the box body 1A, thereby forming a gable roof structure. That is, the packaging box 1 is in a sealed state (hereinafter also referred to as a "sealed state"). In the sealed state, the tip (upper end) of the second connecting wall 17B (the connecting wall 17 forming the insertion port 24) is connected to the first connecting wall 17A (the connecting wall 17 to which the locking piece 18 is continuously provided). ) (see FIG. 5).

As shown in FIG. 5, in the sealed state, the locking piece 18 inserted into the insertion port 24 is pressed from the inside against the folded extension folding line L6 to keep the packaging box 1 sealed. . More specifically, a force (repulsive force) that attempts to return the first extension wall 14 to its original state by the stiffness of the paperboard or the like acts around the upper horizontal folding curve L4. Similarly, a force (repulsive force) that tries to return the connecting wall 17 to its original state is acting around the extended folding line L6 and the inclined folding line L7. Since these repulsive forces act in the direction of opening the pair of locking pieces 18 to the left and right outwards, the locking pieces 18 are pressed against the inner surface of the extended folding line L6 that has been folded into the mountain. As a result, the locking piece 18 is prevented from being pulled out of the insertion port 24, so that the sealed state of the packaging box 1 can be maintained.

According to the packaging box 1 according to the first embodiment described above, since the locking piece 18 and the insertion port 24 appear at the upper end of the box body 1A (see FIG. 4), the operator can is inserted into the insertion port 24 while visually checking. Further, in this packaging box 1, the locking piece 18 inserted into the insertion port 24 is pressed against the mountain-folded extension folding line L6 (the bent portion between the first extension wall 14 and the connecting wall 17). It was configured to be hooked (see Fig. 5). According to this configuration, since the locking piece 18 caught on the extended folding line L6 is restricted from being pulled out, the sealed state of the packaging box 1 can be maintained.

In addition, by deforming the first extension wall 14 and the connecting wall 17 so that the locking piece 18 is separated from the extension folding line L6, the locking piece 18 can be easily pulled out from the insertion port 24 . Specifically, when the user puts his or her fingers on the pair of first connecting walls 17A and pulls them upward and obliquely forward, the locking piece 18 can be lightly pulled out from the insertion opening 24, and the packaging box 1 can be easily opened. be able to. The opened packaging box 1 can be resealed. As described above, there is no need to form cuts in the first and second extension walls 14, 16, etc., in order to open the packaging box 1, and the upper end of the box body 1A can be opened while maintaining the good design of the packaging box 1. Can be opened and closed easily.

In addition, in the packaging box 1 according to the first embodiment, in the sealed state, the pair of gripping pieces 15 are valley-folded along the tip folding lines L5 and overlap each other, so that the pair of first extension walls 14 are folded upward from the butted portion. was extended to According to this configuration, the latching piece 18 inserted into the insertion port 24 can be hidden by the pair of overlapping tabs 15, and the design of the packaging box 1 can be improved. Also, the user can pick up the packaging box 1 by pinching the pair of overlapping tabs 15 . Furthermore, by pulling the pair of gripping pieces 15 away from each other, the user can pull out the locking piece 18 from the insertion opening 24, and the packaging box 1 can be easily opened. In addition, since the tab 15 extends upward from the apex of the gable roof, it is possible to construct a gable top design.

Further, according to the packaging box 1 according to the first embodiment, the upper portion of the second connecting wall 17B forming the insertion port 24 is notched and is one step lower than the upper end of the opposing first connecting wall 17A. , the receptacle 24 can be widened. This makes it easier to insert the locking piece 18 into the insertion port 24 . In addition, in the sealed state, the upper end of the second connecting wall 17B comes into contact with the surface of the opposing first connecting wall 17A along the surface (see FIG. 5), so the packaging box 1 can be configured with few gaps.

[First modification]
In addition, in the packaging box 1 according to the first embodiment, the locking piece 18 and the first connecting wall 17A have substantially the same size in the grain direction, but the present invention is not limited to this. Since it suffices that the left and right outer ends of the pair of locking pieces 18 are pressed against the extended folding line L6, for example, as shown in FIG. may be connected only to the first extension wall 14 side of the tip of the . By narrowing the lateral width of the locking piece 18 in this manner, the locking piece 18 can be easily inserted into the insertion opening 24 .

[Second modification]
Further, in the packaging box 1 according to the first embodiment, the pair of locking pieces 18 are connected to the pair of connecting walls 17 located in the front, are folded backward, and are inserted into the insertion opening 24 . , the invention is not limited thereto. For example, as shown in FIG. 7, the pair of locking pieces 18 may be connected to the distal end portions of the pair of connecting walls 17 that are positioned diagonally (as seen from the plane). In this case, one locking piece 18 is folded backward and inserted into the insertion opening 24 , and the other locking piece 18 is folded forward and inserted into the insertion opening 24 .

[Third Modification]
In addition, in the packaging box 1 according to the first embodiment, the tip (one side) of the first connecting wall 17A, to which the locking piece 18 is continuously provided, is formed parallel to the upper horizontal folding curve L4. is not limited to this. For example, as shown in FIG. 8, the first connecting wall 17A is shaped like an inverted second connecting wall 17B, and the tip of the first connecting wall 17A is different from the tip of the second connecting wall 17B. You may incline in the opposite direction. In this case, the locking piece 18 may be inclined according to the inclination of the tip of the first connecting wall 17A.

In addition, in the packaging box 1 according to the first embodiment (including the first to third modifications; the same applies hereinafter), the vertical folding line L1 is formed in a straight line, but it is not limited to this, curved, It may also be formed in shapes other than straight, such as curved or wavy (not shown). Moreover, in the packaging box 1, the inclined folding line L7 is formed in a straight line, but it is not limited to this, and may be formed in a curved arc shape (not shown).

Also, in the packaging box 1 according to the first embodiment, the pair of tabs 15 are provided at the top, but the pair of tabs 15 may be omitted. In this case, the butted portion of the upper ends of the pair of first extension walls 14 is the uppermost portion of the packaging box 1 (not shown).

[Second embodiment]
Next, a packaging box 2 according to a second embodiment will be described with reference to FIGS. 9 and 10. FIG. FIG. 9 is a perspective view showing the packaging box 2. FIG. 10 is a plan view showing the blank 6 of the packaging box 2. FIG. In addition, the same code|symbol is attached|subjected about the structure similar to the packaging box 1 which concerns on 1st Embodiment, and the description is abbreviate|omitted.

The packaging box 2 according to the second embodiment differs from the packaging box 1 according to the first embodiment in that the box body 1A is omitted. Specifically, as shown in FIG. 10, the lower inner flap 12 is connected to the lower end portion of the second extension wall 16 via a lower horizontal bending curve L2. The lower outer flap 13 is connected to the lower end portion of the first extension wall 14 via the lower horizontal bending curve L2. The roof extension piece 21 is connected to the end of the second extension wall 16 in the step direction via the extension folding line L6. A pair of inclined folding lines L7 formed on each second extension wall 16 extends obliquely upward from the lower portion of the extended folding line L6. Each inclined folding line L7 is curved in an arc shape so as to swell toward both outer sides in the row direction. The pair of gripping pieces 15 (tip bending lines L5) is omitted, and the pair of first extension walls 14 extends to the same position as the tip of the locking piece 18. As shown in FIG. In other words, the upper portion of the first extension wall 14 has a function equivalent to that of the knob 15 .

In the blank 6 (see FIG. 10), the first extension wall 14 and the second extension wall 16 on both sides in the paper grain direction are folded back inward along the extension folding line L6, and the roof joint is attached to the back surface of the folded first extension wall 14. A piece 21 is glued on. Further, similarly to the packaging box 1 according to the first embodiment, the lower inner flap 12 and the lower outer flap 13 are adhered and folded inward. As a result, the packaging box 2 is folded substantially flat (not shown).

As shown in FIG. 9, the operator folds the first extension wall 14 and the second extension wall 16 perpendicularly along the extension folding line L6 to form the one-touch bottom of the packaging box 2. As shown in FIG. Then, the worker accommodates an article (not shown) through the top opening of the packaging box 2 . After that, while inclining the pair of first extension walls 14 and the pair of second extension walls 16 inward, the operator mountain-folds the connecting wall 17 along the extension folding lines L6 and valley-folds along the inclination folding lines L7. , the locking piece 18 is inserted into the insertion opening 24 formed between the first extension wall 14 and the connecting wall 17 . In this state, the upper ends of the pair of first extension walls 14 are butted against each other. The packaging box 2 is sealed by the above.

According to the packaging box 2 according to the second embodiment described above, it is possible to obtain the same effects as the packaging box 1 according to the first embodiment, such as facilitating the opening and closing of the top opening.

Although illustration is omitted, the features of the packaging box 1 according to the first to third modifications of the first embodiment may be applied to the packaging box 2 according to the second embodiment.

Also, in the packaging box 2 according to the second embodiment, the tab 15 is omitted, but like the packaging box 1 according to the first embodiment, the tab 15 is continuously provided at the upper end of the first extension wall 14. (not shown)

In addition, in the packaging boxes 1 and 2 according to the first and second embodiments, the locking piece 18 is formed in a substantially rectangular shape, but the present invention is not limited to this. The locking piece 18 may have any shape as long as it is in contact with the extension folding line L6 when inserted into the insertion port 24. For example, it may be formed in a polygonal shape other than a rectangular shape, or may be formed in a semicircular shape. good (not shown).

In addition, in the packaging boxes 1 and 2 according to the first and second embodiments, the second extension wall 16 is formed in a substantially isosceles triangle shape with the upper horizontal folding curve L4 as the base, but not limited to this, It may be formed in an asymmetrical triangular shape with respect to a vertical line extending from the vertex V of the triangle to the base (not shown).

In addition, in the packaging boxes 1 and 2 according to the first and second embodiments, the gable roof structure (sealing structure) formed by the first extension wall 14, the second extension wall 16, the connecting wall 17 and the locking piece 18 is , and connected to the top of the box body 1A in the shape of a rectangular tube, or connected to the bottom surface of the packaging box 2, but the present invention is not limited to this. For example, the gable roof structure formed by the first extension wall 14, the second extension wall 16, the connecting wall 17, and the locking piece 18 may be connected to a bag-like package (not shown). ). This configuration also allows the package to be opened and closed easily.

In addition, although the packaging boxes 1 and 2 according to the first and second embodiments are made of cardboard (single-layer paper), the present invention is not limited to this. It may be formed of a plate made of

It should be noted that the description of the above embodiment shows one aspect of the packaging box and the sealing structure of the packaging box according to the present invention, and the technical scope of the present invention is not limited to the above embodiment.

1, 2 packaging box 1A box body 10 first side wall 11 second side wall 14 first extension wall 15 knob piece 16 second extension wall 17 connecting wall 18 locking piece 24 insertion port L1 vertical folding line (boundary line)
L5 tip folding line L6 extension folding line L7 inclined folding line L8 locking folding line

Claims (4)

a pair of first extension walls (14) arranged to face each other in the first direction;
a pair of second extension walls (16) arranged facing each other in a second direction orthogonal to the first direction;
It is connected to the first extension wall via an extension folding line (L6), and is connected to the second extension wall via an inclined folding line (L7) extending obliquely with respect to the extension folding line. four connecting walls (17),
connected to the tips of the pair of connecting walls located on one side of the first extension wall or the tips of the pair of connecting walls located diagonally via locking folding lines (L8) A pair of locking pieces (18),
A distal end portion of the connecting wall to which the locking piece is connected is formed parallel to a proximal end portion of the second extension wall,
The locking piece is connected at least to the first extension wall side of the tip of the connection wall,
The tip portions of the pair of inclined folding lines formed between the second extension wall and the pair of connecting walls coincide with each other on the base end side of the locking folding line to form a vertex,
The first extension wall and the second extension wall are inclined inward, and the connecting wall is mountain-folded along the extension folding line and valley-folded along the inclination folding line to form the first extension wall and the second extension wall. In the sealed state folded between the extension wall, the locking piece is valley-folded along the locking folding line to form a receptacle formed between the first extension wall and the connecting wall facing each other. (24) and pressed from the inside against the mountain-folded extended folding line to hold the sealed state ,
The tip portion of the connecting wall forming the insertion port is inclined from the tip of the extended folding line toward the apex of the inclined folding line toward the base end side. A packaging box, characterized in that the connecting walls are in contact with each other along the surfaces of the connecting walls . a box body (1A) formed in a cylindrical shape by alternately connecting a pair of first side walls (10) and a pair of second side walls (11);
a pair of first extension walls (14) connected to one end of the pair of first side walls;
a pair of second extension walls (16) connected to one end of the pair of second side walls;
It is connected to the first extension wall via an extension folding line (L6) extending along the boundary line (L1) between the first side wall and the second side wall, and is oblique from one end of the boundary line. Four connecting walls (17) connected to the second extension wall via inclined folding lines (L7) extending to
connected to the tips of the pair of connecting walls located on one side of the first extension wall or the tips of the pair of connecting walls located diagonally via locking folding lines (L8) A pair of locking pieces (18),
A distal end portion of the connecting wall to which the locking piece is connected is formed parallel to a proximal end portion of the second extension wall,
The locking piece is connected at least to the first extension wall side of the tip of the connection wall,
The tip portions of the pair of inclined folding lines formed between the second extension wall and the pair of connecting walls coincide with each other on the base end side of the locking folding line to form a vertex,
The first extension wall and the second extension wall are bent inward and inclined, and the connecting wall is mountain-folded along the extension folding line and valley-folded along the inclination folding line to form the first extension wall and the connection wall. In the sealed state folded between the second extension wall, the locking piece is valley-folded along the locking folding line, and a gap is formed between the opposing first extension wall and the connecting wall. It is inserted into the inlet (24) and pressed from the inside against the mountain-folded extended folding line to maintain the sealed state ,
The tip portion of the connecting wall forming the insertion port is inclined from the tip of the extended fold line toward the vertex of the inclined fold line, and the locking piece is in the sealed state. A packaging box, characterized in that the connecting walls are in contact with each other along the surfaces of the connecting walls . A pair of knob pieces (15) connected to the tip end portions of the pair of first extension walls via tip bending lines (L5),
3. The packaging box according to claim 1, wherein, in the sealed state, the pair of tabs are valley-folded along the leading end fold lines and overlap each other. A pair of first extension walls (14) arranged to face each other in a first direction, a pair of second extension walls (16) arranged to face each other in a second direction orthogonal to the first direction, and an extension fold. connected to the first extension wall via a curved line (L6) and connected to the second extension wall via an inclined folding line (L7) extending obliquely with respect to the extension folding line A sealing structure for a package comprising four connecting walls (17),
At the tips of the pair of connecting walls positioned on one of the first extension walls or the tips of the pair of connecting walls positioned diagonally, a pair of A locking piece (18) is continuously provided,
A distal end portion of the connecting wall to which the locking piece is connected is formed parallel to a proximal end portion of the second extension wall,
The locking piece is connected at least to the first extension wall side of the tip of the connection wall,
The tip portions of the pair of inclined folding lines formed between the second extension wall and the pair of connecting walls coincide with each other on the base end side of the locking folding line to form a vertex,
The first extension wall and the second extension wall are inclined inward, and the connecting wall is mountain-folded along the extension folding line and valley-folded along the inclination folding line to form the first extension wall and the second extension wall. In the sealed state folded between the extension wall, the locking piece is valley-folded along the locking folding line to form a receptacle formed between the first extension wall and the connecting wall facing each other. (24) and pressed from the inside against the mountain-folded extended folding line to hold the sealed state ,
The tip portion of the connecting wall forming the insertion port is inclined from the tip of the extended folding line toward the apex of the inclined folding line toward the base end side. A sealing structure for a package, characterized in that contact is made along the surfaces of the connected connecting walls .

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