JP7242424B2 - packaging container - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container in which a cover plate is continuously provided at the end of a side plate that constitutes the side surface of a box body.

For example, the hinge cover carton described in Patent Document 1 is composed of a main body and a lid. The lid has a top plate that is connected to the side plate of the main body via a fold line. By folding the top plate along the fold line, the top opening of the tray-like body is closed and the hinge cover carton is sealed.

JP 2006-182437 A

However, as shown in FIG. 9, when the hinge cover carton described above is sealed, the top plate may not be properly folded at the fold line, and may be bent (distorted) so as to protrude inside the main body. Therefore, the operation of sealing the hinge cover carton could not be performed smoothly.

In order to solve the above problems, the present invention provides a packaging container that can be smoothly sealed.

In order to achieve the above object, the present invention provides a packaging container in which a cover plate is continuously attached to an end of a side plate constituting a side surface of a box body, and the cover plate extends along the boundary between the side plate and the cover plate. a main folding line that serves as a rotation axis when the cover plate is opened and closed with respect to the box body; and a cover plate extending along the main folding line near the main folding line, and an auxiliary folding line for bending the cover plate in the process of opening and closing the plate.

In this case, it is preferable that the auxiliary folding line is formed between both ends of the cover plate away from both ends toward the center in the extending direction.

In this case, it is preferable to further include a pair of end folding lines extending toward the free end side of the cover plate toward the outside from both ends in the extending direction of the auxiliary folding lines.

In this case, it is preferable that the auxiliary folding line is formed to be longer than the dimension in the projecting direction of the cover plate orthogonal thereto.

In this case, it is preferable that a score line is formed along the auxiliary folding line at the central portion in the extending direction of the main folding line.

According to the present invention, the packaging container can be smoothly sealed.

1 is a perspective view of the packaging container according to the first embodiment of the present invention, showing a state in which the cover plate is closed; FIG. 1 is a perspective view of the packaging container according to the first embodiment of the present invention, showing a state in which a cover plate is opened; FIG. 1 is a plan view showing a blank of a packaging container according to a first embodiment of the present invention; FIG. It is a perspective view which shows the state which folded the packaging container which concerns on 1st Embodiment of this invention. 1 is a cross-sectional view of the packaging container according to the first embodiment of the present invention, showing a state in which a cover plate is opened; FIG. FIG. 4 is a cross-sectional view of the packaging container according to the first embodiment of the present invention, showing a state in which the cover plate is being closed. FIG. 11 is a plan view showing a blank of a packaging container according to a second modified example of the first embodiment of the present invention; FIG. 10 is a perspective view showing a packaging container according to a second embodiment of the present invention with a cover plate closed. 1 is a perspective view showing an example of a conventional hinge cover carton (packaging container); FIG.

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, although terms indicating directions and positions are used in this specification, these terms are used for convenience of explanation and do not limit the technical scope of the present invention.

[First Embodiment: Outline of Packaging Container]
The configuration of the packaging container 1 will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is a perspective view showing a state in which the cover plate 16 is closed. FIG. 2 is a perspective view showing a state in which the cover plate 16 is opened. FIG. 3 is a plan view showing the blank 5 of the packaging container 1. FIG.

As shown in FIGS. 1 and 2, the packaging container 1 is a paper container in which a cover plate 16 is continuously provided on the upper end of a back plate 14 (side plate) that constitutes the back (side) of the box body 1A. The box body 1A is formed in the shape of a flat tray, and articles (not shown) are accommodated inside the box body 1A. The lid plate 16 is provided on the back plate 14 of the box body 1A so as to be able to be closed and closed. The packaging container 1 is sealed by closing the top opening of the box body 1A with the cover plate 16 (see FIG. 1). When the cover plate 16 opens the top opening of the box body 1A (see FIG. 2), the stored articles are taken out.

The packaging container 1 is formed by assembling blanks 5 shown in FIG. The blank 5 is formed by punching out a sheet of paperboard with a die or the like. The paperboard is made of multiple layers, but is not limited to this, and may be made of a single layer. In addition, FIG. 3 shows the outer surface (surface) side of the packaging container 1 . Also, "X" shown in the drawings indicates the "paper grain direction" in which the fibers of the paper (paper grain) extend, and "Y" indicates the "width direction" orthogonal to the paper grain direction. Further, in this specification, terms indicating up/down, left/right, front/rear, and similar directions refer to directions in the assembled state (assembled state) of the packaging container 1 .

[blank]
As shown in FIG. 3, the blank 5 includes a bottom plate 10, a pair of end plates 11, a pair of inner flaps 12, a front plate 13, a rear plate 14, four passage pieces 15, and a cover plate. 16 and an insertion piece 17.

<Bottom plate, end plate, inner flap>
The bottom plate 10 is formed in a substantially rectangular shape whose width dimension is longer (approximately twice as long) than its grain direction dimension. The pair of end plates 11 are connected to both ends of the bottom plate 10 in the width direction via a first folding line 20 . Each end plate 11 is formed in a substantially rectangular shape, and its widthwise dimension (projection dimension) is set to be sufficiently shorter (1/3 or less) than the dimension of the bottom plate 10 in the grain direction. The pair of inner flaps 12 are connected to both ends in the width direction of the pair of end plates 11 via the second folding lines 21 . Each inner flap 12 is formed in a substantially trapezoidal shape that tapers in the grain direction from the side of the second folding line 21 toward the tip. The widthwise dimension (projection dimension) of each inner flap 12 is set to be shorter (1/2 or less) than the projection dimension of the end plate 11 .

A pair of folding lines 22 are formed on each end plate 11 and each inner flap 12 . A pair of folding lines 22 obliquely extend from both ends of the first folding line 20 toward the tip of the inner flap 12 so as to approach each other. The leading ends of the pair of folding lines 22 are separated from each other in the grain direction, and the pair of folding lines 22 form a "V" shape.

<Front plate, back plate>
The front plate 13 is connected to one end (front end) of the bottom plate 10 in the grain direction via a third folding line 23 . The front plate 13 is formed in a substantially rectangular shape, and its dimension in the grain direction (projection dimension) is substantially the same as the projection dimension of the end plate 11 . A finger hooking recess 13A is recessed from the front end toward the base end in the paper grain direction in the width direction central portion of the front plate 13 . The back plate 14 is connected to the other end (rear end) of the bottom plate 10 in the grain direction via a third folding line 23 . The back plate 14 is formed in substantially the same shape (substantially rectangular shape) as the front plate 13 .

<Passage piece>
The four passage pieces 15 are connected to both ends of the front plate 13 and the rear plate 14 in the width direction via the fourth folding lines 24 . Each passage piece 15 is formed in a substantially trapezoidal shape that tapers in the grain direction from the side of the fourth folding line 24 toward the tip.

<Cover plate, insert piece>
The cover plate 16 is connected to the front end (upper end) of the rear plate 14 via a main folding line 26 . The cover plate 16 is formed in substantially the same shape (substantially rectangular shape) as the bottom plate 10 . The insertion piece 17 is connected to the tip of the cover plate 16 in the grain direction via the fifth folding line 25 . The insertion piece 17 is formed in a substantially trapezoidal shape (exactly a hexagonal shape) tapered in the width direction from the side of the fifth folding line 25 toward the tip. The dimension of the insertion piece 17 in the paper grain direction (projection dimension) is set slightly shorter than the projection dimension of the front plate 13 .

The first folding line 20, the second folding line 21, the folding line 22, the fourth folding line 24, and the fifth folding line 25 are general-purpose ruled lines formed by linearly recessing the surface of the paperboard. The third folding line 23 described above is a lead ruled line in which a plurality of cuts are arranged at predetermined intervals on a general-purpose ruled line. The respective folding lines 20 to 25 are not limited to general-purpose ruled lines or lead ruled lines, and may be any lines for folding paperboard.

<Main folding curve>
The main folding line 26 described above is a general ruled line extending along the boundary between the back plate 14 and the lid plate 16 . In addition, a plurality of cut lines 26A are formed along the auxiliary folding lines 27 at the central portion in the extending direction of the main folding lines 26. As shown in FIG. Although the details will be described later, the main folding line 26 serves as a rotation axis for opening and closing the cover plate 16 with respect to the box body 1A.

<Auxiliary folding line>
An auxiliary folding line 27 extends along the main folding line 26 in the vicinity of the main folding line 26 on the cover plate 16 . The auxiliary folding lines 27 are general-purpose ruled lines extending substantially parallel to the main folding lines 26 . Specifically, the auxiliary folding line 27 is formed at a position about 3.5 mm away from the main folding line 26 toward the tip of the cover plate 16 . The distance between the auxiliary folding line 27 and the main folding line 26 can be appropriately changed depending on the size of the cover plate 16, the strength of the paperboard, etc., but is preferably set within the range of 3 to 20 mm.

Further, the auxiliary folding line 27 is formed between both end positions P spaced apart from both ends of the cover plate 16 in the extending direction toward the center. In other words, the auxiliary folding lines 27 do not extend to both ends of the cover plate 16 in the width direction, and regions in which the auxiliary folding lines 27 are not formed are provided on both sides of the cover plate 16 in the width direction. The auxiliary folding line 27 is formed longer than the dimension of the cover plate 16 in the grain direction (protruding direction) perpendicular thereto. That is, the lid plate 16 and the box body 1A supporting it have a dimension that is longer in the left-right direction (width direction) than in the front-back direction (paper grain direction). Both end positions P are separated from both ends of the cover plate 16 by about 15 mm. Each interval between both end positions P and both ends of the cover plate 16 (the width of the region where the auxiliary folding line 27 is not formed) can be appropriately changed depending on the size of the cover plate 16, the strength of the paperboard, etc., but it is 10 to 20 mm. It is preferable to set within a range.

[Packaging container assembly]
Next, the process of assembling the packaging container 1 will be described with reference to FIGS. 2 and 4. FIG. FIG. 4 is a perspective view showing a state in which the packaging container 1 is folded. The packaging container 1 may be assembled automatically or semi-automatically by a box-making machine or the like, but here, as an example, a case where the packaging container 1 is manually assembled by an operator will be described.

As shown in FIG. 2, the operator places the back surface of the blank 5 upward, bends the front plate 13 and the rear plate 14 along the third folding line 23, and erects the four successive pieces. 15 is folded inward along the fourth folding line 24 . Subsequently, the operator bends the pair of end plates 11 along the first folding line 20 to stand them up, and adheres the four successive pieces 15 to the inner surfaces of the pair of end plates 11 . In addition, the passage pieces 15 are adhered to the triangular corners of the end plate 11 defined by the folding lines 22 .

As described above, the tray-shaped box main body 1A is formed. The bottom plate 10 constitutes the bottom surface of the box body 1A, and the pair of end plates 11, the front plate 13 and the rear plate 14 constitute the side surfaces of the box body 1A.

Next, as shown in FIG. 4 , the operator folds the end plates 11 and the inner flaps 12 inward along the fold lines 22 . Along with this, the front plate 13 and the rear plate 14 are bent so as to overlap the bottom plate 10 , and the cover plate 16 overlaps the front plate 13 which overlaps the bottom plate 10 .

As described above, the packaging container 1 is flatly folded. The packaging container 1 is delivered to the customer in such a folded state.

[Sealing of packaging containers]
Next, with reference to FIGS. 1, 2, 5 and 6, the process of storing articles in the packaging container 1 and sealing the packaging container 1 will be described. FIG. 5 is a sectional view showing a state in which the cover plate 16 is opened. FIG. 6 is a cross-sectional view showing a state in which the cover plate 16 is being closed.

The operator raises the side of the folded packaging container 1 (see FIG. 4) by reversing the procedure for folding the packaging container 1 described above (see FIG. 2). Also, as shown in FIGS. 2 and 5, the operator folds (opens) the cover plate 16 rearward along the main folding line 26 so that the articles can be easily accommodated in the box body 1A. It is preferable that the cover plate 16 is inclined slightly backwards rather than standing substantially vertically. Further, as shown in FIG. 5, the lid plate 16 is slightly bent backward along the auxiliary folding line 27 in the process of opening the lid plate 16 . In other words, the lid plate 16 is bent in two steps at the main folding line 26 and the auxiliary folding line 27, and is slightly bent in a substantially V shape at the auxiliary folding line 27 (see circle in FIG. 5).

Subsequently, after placing the article on the bottom plate 10 of the box body 1A, the worker folds the pair of inner flaps 12 inward along the second folding lines 21 (see FIG. 2), and folds the main folding lines 26. The cover plate 16 is rotated forward as a rotation shaft (see FIG. 6). Specifically, the operator puts fingers on both the left and right sides of the cover plate 16 and pulls the cover plate 16 forward (closes). Here, if the auxiliary folding line 27 is not formed on the cover plate 16, the cover plate 16 will be in the shape of a single flat plate. It may bend (distort) so as to protrude inside the box body 1A without breaking. On the other hand, as shown in FIG. 5, the cover plate 16 according to the first embodiment is slightly bent rearward (upward in FIG. 6) at the auxiliary folding line 27, so that it has a flat plate shape that is not bent. Compared to , it is difficult to bend (hard to distort). Since the lid plate 16 rotates forward about the main folding line 26 while maintaining the folded state along the auxiliary folding line 27, the lid plate 16 bends (distorts) so as to protrude into the box body 1A. ) is suppressed.

While folding (closing) the cover plate 16 along the main folding line 26 , the operator folds the insertion piece 17 downward along the fifth folding line 25 to separate the front plate 13 and the pair of inner flaps 12 . insert in between.

As described above, the cover plate 16 closes the top opening of the tray-shaped box body 1A, and the packaging container 1 is sealed (see FIG. 1). When the packaging container 1 is to be opened, the operator puts his or her finger on the insertion piece 17 exposed in the finger hooking recess 13A of the front plate 13 and pulls up (opens) the cover plate 16 . At this time, the cover plate 16 is also slightly bent at the auxiliary folding line 27 and rotated upward (or backward) about the main folding line 26 as a rotation axis.

In the packaging container 1 according to the first embodiment described above, the auxiliary folding line 27 is configured to bend the cover plate 16 in the process of opening and closing the cover plate 16 . Also, the cover plate 16 is configured to rotate around the main folding line 26 while maintaining the folded state at the auxiliary folding line 27 . According to this configuration, the lid plate 16 that is bent at the auxiliary folding line 27 is less likely to bend, so that the lid plate 16 can be rotated around the main folding line 26 without being distorted. As a result, the lid plate 16 can be smoothly opened and closed, so that the packaging container 1 can be smoothly sealed. In the above description, the cover plate 16 is slightly bent backward in FIG. (not shown).

By the way, since the lid plate 16 rotates around the main folding line 26 in a state of being folded along the auxiliary folding line 27 , the lid plate 16 is likely to have creases due to the auxiliary folding line 27 . This crease creates a gap (not shown) in the range surrounded by the box body 1A, the main folding line 26 and the auxiliary folding line 27 (in the vicinity of the main folding line 26). If the auxiliary folding lines 27 extend to both the left and right ends of the cover plate 16, gaps formed by the creases of the cover plate 16 are exposed at the left and right ends of the packaging container 1 (near the main folding lines 26). The designability of the packaging container 1 is deteriorated. On the other hand, in the packaging container 1 according to the first embodiment, regions where the auxiliary folding lines 27 are not formed exist on both the left and right sides of the cover plate 16 . According to this configuration, compared to the case where the auxiliary folding lines 27 are extended to the left and right ends of the cover plate 16, the creases at the left and right ends of the cover plate 16 can be reduced. As a result, gaps due to the crease of the lid plate 16 can be made inconspicuous, and the packaging container 1 can be formed into a good shape without unnecessary gaps when sealed.

Further, according to the packaging container 1 according to the first embodiment, the cover plate 16 that is long in the left-right direction is easily bent near the center thereof, but the cover plate 16 is bent at the auxiliary folding line 27 while maintaining the main fold. By turning around the curved line 26, the cover plate 16 can be made difficult to bend. Thereby, the packaging container 1 can be smoothly sealed.

Further, according to the packaging container 1 according to the first embodiment, the auxiliary folding line 27 is weakened by the score line 26A, so that the lid plate 16 can be easily folded. As a result, the cover plate 16 can be smoothly opened and closed without being distorted.

In addition, in the packaging container 1 according to the first embodiment, the auxiliary folding lines 27 do not extend to the left and right ends of the lid plate 16, and the auxiliary folding lines 27 are not formed on both the left and right sides of the lid plate 16. The invention is not so limited. For example, as a first modified example, the auxiliary folding lines 27 may extend to both the left and right ends of the lid plate 16 (not shown), provided that the gaps formed by the creases of the lid plate 16 can be ignored. .

Further, as shown in FIG. 7, as a second modification, the pair of end folding lines 28 extend outward from the ends of the extending direction of the auxiliary folding lines 27, and the free ends of the cover plate 16 (insertion pieces 17 ) may be extended on the side of For example, the pair of end folding lines 28 are arc-shaped general-purpose ruled lines that are convex in the direction of approaching each other. According to this configuration, since the pair of end folding lines 28 are separated from the auxiliary folding lines 27, the gap due to the crease of the cover plate 16 can be made inconspicuous. As a result, the packaging container 1 at the time of sealing can be formed into a good shape without unnecessary gaps. The pair of end folding lines 28 may be formed in an arcuate shape that is concave in the direction away from each other, or may be formed in a straight line (not shown). Further, each edge folding line 28 is not limited to a general-purpose ruled line, and may be another folding line such as a perforating blade line. Furthermore, although each end folding line 28 extends continuously from the end of the auxiliary folding line 27, it is not limited to this, and may have a gap between it and the end of the auxiliary folding line 27. (not shown).

Further, in the packaging container 1 according to the first embodiment, the packaging container 1 (cover plate 16) is formed in a rectangular shape elongated in the horizontal direction when viewed from the top, but the present invention is not limited to this. For example, the packaging container 1 (cover plate 16) may be square when viewed from above, or may be formed in a rectangular shape elongated in the front-rear direction (not shown). In this case, the auxiliary folding line 27 may be formed shorter than the dimension of the cover plate 16 in the front-rear direction (protruding direction). Even with such a configuration, the lid plate 16 can be rotated around the main folding line 26 without being distorted, and the packaging container 1 can be smoothly sealed.

Further, in the packaging container 1 according to the first embodiment, the main folding line 26 is formed between the back plate 14 and the lid plate 16, and the auxiliary folding line 27 is formed in the lid plate 16. It is not limited to this. For example, as shown in FIG. 8, the packaging container 2 according to the second embodiment may be a so-called A-type box. In this case, a main folding line 26 is formed between the side plate 30 (side plate) and the flap 31 (cover plate), and an auxiliary folding line 27 is formed on the flap 31 .

In addition, although the packaging container 1 and the like according to the first embodiment are made of paperboard, they are not limited to this, and may be made of, for example, a resin board, paper or resin corrugated cardboard sheet, or the like. .

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

1, 2 packaging container 1A box body 14 back plate (side plate)
16 Lid plate 26 Main folding line 26A Scoring line 27 Auxiliary folding line 28 End folding line 30 Side plate (side plate)
31 flap (lid plate)
P Both ends position

Claims (3)

A packaging container (1) in which a cover plate (16) is connected to the end of a side plate (14) that constitutes the side surface of a box body (1A),
a main folding line (26) extending along the boundary between the side plate and the lid plate and serving as a rotation axis when the lid plate is opened and closed with respect to the box body;
an auxiliary folding line (27) extending along the main folding line in the vicinity of the main folding line on the cover plate, and bending the cover plate in the process of opening and closing the cover plate. ,
The auxiliary folding line is formed between both end positions (P) away from both ends of the cover plate in the extending direction toward the center,
A packaging container, further comprising a pair of end folding lines (28) extending toward the free end side of the cover plate toward the outside from both ends in the extending direction of the auxiliary folding lines. 2. The packaging container according to claim 1 , wherein said auxiliary folding line is formed to be longer than a dimension in a projecting direction of said cover plate perpendicular thereto. The packaging container according to claim 1 or 2, wherein a score line (26A) is formed along the auxiliary folding line at the central portion in the extending direction of the main folding line.

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