JP2020189652A - Packaging container - Google Patents

Abstract

To provide a packaging container capable of sealing smoothly.SOLUTION: In a packaging container 1, a lid plate 16 is connected to an end part of a back plate 14 for constituting a side surface of a box body 1A. The packaging container 1 includes: a main curve 26 extended along a boundary between the back plate 14 and the lid plate 16, and serving as a rotary shaft when opening/closing the lid plate 16 with respect to the box body 1A; and an auxiliary curve 27 extended along the main curve 26 in the neighborhood of the main curve 26 in the lid plate 16, and for bringing the lid plate 16 into a bent state in a process of opening/closing the lid plate 16.SELECTED DRAWING: Figure 6

Description

The present invention relates to a packaging container in which a lid plate is continuously provided at an end of a side plate constituting a 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 portion. The lid portion has a top plate connected to the side plate of the main body via a polygonal line. By bending the top plate along the folding line, the upper opening of the tray-shaped main body is closed and the hinge cover carton is sealed.

Japanese Unexamined Patent Publication No. 2006-182437

However, as shown in FIG. 9, when the above-mentioned hinge cover carton was sealed, the top plate sometimes bent (distorted) so as to protrude into the main body without being properly broken at the polygonal line. Therefore, the work of sealing the hinge cover carton could not be performed smoothly.

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

In order to achieve the above object, the present invention is a packaging container in which a lid plate is continuously provided at the end of a side plate constituting the side surface of the box body, and extends along the boundary between the side plate and the lid plate. A main fold curve that serves as a rotation axis when opening and closing the lid plate with respect to the box body, and a lid that extends along the main fold curve in the vicinity of the main fold curve in the lid plate. It is provided with an auxiliary folding curve that makes the lid plate bent in the process of opening and closing the plate.

In this case, it is preferable that the auxiliary folding curve is formed between both end positions of the lid plate separated from both ends toward the center in the extending direction.

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

In this case, it is preferable that the auxiliary folding curve is formed longer than the dimension in the projecting direction of the lid plate orthogonal to the auxiliary folding curve.

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

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

FIG. 5 is a perspective view showing a state in which the lid plate is closed, which is a packaging container according to the first embodiment of the present invention. It is a packaging container which concerns on 1st Embodiment of this invention, and is the perspective view which shows the state which opened the lid plate. It is a top view which shows the blank of the packaging container which concerns on 1st Embodiment of this invention. It is a perspective view which shows the folded state of the packaging container which concerns on 1st Embodiment of this invention. FIG. 5 is a cross-sectional view showing a state in which the lid plate is opened in the packaging container according to the first embodiment of the present invention. It is sectional drawing which shows the middle of closing the lid plate which is the packaging container which concerns on 1st Embodiment of this invention. It is a top view which shows the blank of the packaging container which concerns on 2nd modification of 1st Embodiment of this invention. FIG. 5 is a perspective view showing a state in which the lid plate is closed, which is a packaging container according to a second embodiment of the present invention. It is a perspective view which shows an example of the conventional hinge cover carton (packaging container).

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each figure, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates "right". "Upper" is indicated, and "D" is "lower". In addition, although terms indicating directions and positions are used in the present 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. 1 is a perspective view showing a state in which the lid plate 16 is closed. FIG. 2 is a perspective view showing a state in which the lid plate 16 is opened. FIG. 3 is a plan view showing a blank 5 of the packaging container 1.

As shown in FIGS. 1 and 2, the packaging container 1 is a paper container in which a lid plate 16 is continuously provided at the upper end of a back plate 14 (side plate) constituting the back surface (side surface) of the box body 1A. The box body 1A is formed in a flat tray shape, and articles (not shown) are housed 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 closeable. The lid plate 16 closes the upper surface opening of the box body 1A (see FIG. 1), so that the packaging container 1 is sealed. When the lid plate 16 opens the upper surface opening of the box body 1A (see FIG. 2), the contained article is taken out.

The packaging container 1 is formed by assembling the blank 5 shown in FIG. The blank 5 is formed by punching a piece of paperboard with a die or the like. The paperboard is a multi-layer paperboard, but the paperboard is not limited to this and may be a single-layer paperboard. Note that FIG. 3 shows the outer surface (surface) side of the packaging container 1. Further, "X" shown in the drawing indicates a "paper grain direction" in which a paper fiber (paper grain) extends, and "Y" indicates a "width direction" orthogonal to the paper grain direction. Further, in the present specification, terms indicating up / down, left / right, front / back, 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 face plates 11, a pair of inner flaps 12, a front plate 13, a back plate 14, four joint pieces 15, and a lid plate. 16 and a plug 17 are provided.

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

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

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

<Section piece>
The four joint pieces 15 are connected to both ends in the width direction of the front plate 13 and the back plate 14 via the fourth folding curve 24. Each joint piece 15 is formed in a substantially trapezoidal shape that narrows in the grain direction from the side of the fourth folding curve 24 toward the tip.

<Lid plate, insertion piece>
The lid plate 16 is continuously provided at the tip end portion (upper end portion) of the back plate 14 via the main folding curve 26. The lid plate 16 is formed to have substantially the same shape (substantially rectangular shape) as the bottom plate 10. The insertion piece 17 is continuously provided at the tip end portion of the lid plate 16 in the paper grain direction via the fifth folding curve 25. The insertion piece 17 is formed in a substantially trapezoidal shape (to be exact, a hexagonal shape) that narrows in the width direction from the side of the fifth folding curve 25 toward the tip. The dimension of the insertion piece 17 in the paper grain direction (protruding dimension) is set to be slightly shorter than the protruding dimension of the front plate 13.

The first fold curve 20, the second fold curve 21, the fold line 22, the fourth fold curve 24, and the fifth fold curve 25, respectively, are general-purpose ruled lines in which the paperboard is linearly recessed from the surface. Further, the third folding curve 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 folding curves 20 to 25 are not limited to general-purpose ruled lines and lead ruled lines, and may be any line as long as it is a line for folding paperboard.

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

<Auxiliary folding curve>
On the lid plate 16, an auxiliary folding curve 27 extends along the main folding curve 26 in the vicinity of the main folding curve 26. The auxiliary folding curve 27 is a general-purpose ruled line extending substantially parallel to the main folding curve 26. Specifically, the auxiliary folding curve 27 is formed at a position about 3.5 mm away from the main folding curve 26 on the tip end side of the lid plate 16. The distance between the auxiliary folding curve 27 and the main folding curve 26 can be appropriately changed depending on the size of the lid plate 16, the strength of the paperboard, and the like, but it is preferably set in the range of 3 to 20 mm.

Further, the auxiliary folding curve 27 is formed between both end positions P separated from both ends of the lid plate 16 in the extending direction toward the center side. In other words, the auxiliary fold curve 27 does not extend to both ends in the width direction of the lid plate 16, and regions are provided on both sides of the lid plate 16 in the width direction in which the auxiliary fold curve 27 is not formed. The auxiliary folding curve 27 is formed longer than the size of the lid plate 16 orthogonal to the auxiliary folding curve 27 in the paper grain direction (protruding direction). That is, the lid plate 16 and the box body 1A supporting the lid plate 16 have dimensions longer in the left-right direction (width direction) than in the front-rear direction (paper grain direction). The both end positions P are separated from both ends of the lid plate 16 by about 15 mm. The distance between both end positions P and both ends of the lid plate 16 (the width of the region where the auxiliary folding curve 27 is not formed) can be appropriately changed depending on the size of the lid plate 16 and the strength of the paperboard, but is 10 to 20 mm. It is preferable to set in the range.

[Assembly of packaging container]
Next, the assembly process of the packaging container 1 will be described with reference to FIGS. 2 and 4. FIG. 4 is a perspective view showing a folded state of the packaging container 1. 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 an operator manually assembles the packaging container 1 will be described.

As shown in FIG. 2, the operator puts the back surface of the blank 5 facing upward, bends the front plate 13 and the back plate 14 along the third folding curve 23 to stand upright, and four joint pieces. Fold 15 inward along the fourth fold curve 24. Subsequently, the operator bends the pair of end face plates 11 along the first folding curve 20 to stand upright, and adheres the four joint pieces 15 to the inner surfaces of the pair of end face plates 11. The joint piece 15 is adhered to the triangular corner portion of the end face plate 11 partitioned by the folding line 22.

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

Next, as shown in FIG. 4, the operator folds each end face plate 11 and each inner flap 12 in a valley along the folding line 22 and folds them inward. Along with this, the front plate 13 and the back plate 14 are bent so as to overlap the bottom plate 10, and the lid plate 16 overlaps the front plate 13 which overlaps the bottom plate 10.

As a result, the packaging container 1 is folded flat. The packaging container 1 is delivered to the customer in such a folded state.

[Seal of packaging container]
Next, a step of accommodating an article inside the packaging container 1 and sealing the packaging container 1 will be described with reference to FIGS. 1, 2, 5, and 6. FIG. 5 is a cross-sectional view showing a state in which the lid plate 16 is opened. FIG. 6 is a cross-sectional view showing the middle of closing the lid plate 16.

The operator raises the side surface of the folded packaging container 1 (see FIG. 4) by reversing the procedure of folding the packaging container 1 described above (see FIG. 2). Further, as shown in FIGS. 2 and 5, the operator bends (opens) the lid plate 16 backward along the main folding curve 26 so that the article can be easily stored in the box body 1A. It is preferable that the lid plate 16 is tilted slightly rearward from the posture in which the lid plate 16 stands up substantially vertically. Further, as shown in FIG. 5, in the process of opening the lid plate 16, the lid plate 16 is slightly bent backward along the auxiliary folding curve 27. That is, the lid plate 16 is bent in two stages at the main folding curve 26 and the auxiliary folding curve 27, and is slightly bent in a substantially V shape at the auxiliary folding curve 27 (see the circle in FIG. 5).

Subsequently, the operator places the article on the bottom plate 10 of the box body 1A, then bends the pair of inner flaps 12 inward along the second folding curve 21 (see FIG. 2), and bends the main folding curve 26. The lid plate 16 is rotated forward as a rotation axis (see FIG. 6). Specifically, the operator puts his or her fingers on the left and right sides of the lid plate 16 and tilts (closes) the lid plate 16 toward you. Here, if the auxiliary folding curve 27 is not formed on the lid plate 16, the lid plate 16 has a single flat plate shape, so that the main folding curve 26 is appropriate depending on how the bending force is applied. It may bend (distort) so as to protrude inside the box body 1A without breaking. On the other hand, as shown in FIG. 5, since the lid plate 16 according to the first embodiment is slightly bent rearward (upward in FIG. 6) along the auxiliary folding curve 27, it has a flat plate shape that is not bent. Compared to, it is hard to bend (hard to distort). Then, since the lid plate 16 rotates forward around the main folding curve 26 while maintaining the folded state on the auxiliary folding curve 27, the lid plate 16 bends (distorts) so as to protrude inside the box body 1A. ) Is suppressed.

The operator bends the lid plate 16 along the main folding curve 26 (while closing), and bends the insertion piece 17 downward along the fifth folding curve 25 to form the front plate 13 and the pair of inner flaps 12. Insert in between.

As a result, the lid plate 16 closes the upper surface opening of the tray-shaped box body 1A, and the packaging container 1 is sealed (see FIG. 1). When opening the packaging container 1, the operator hooks a finger on the insertion piece 17 exposed in the finger hook recess 13A of the front plate 13 and pulls up (opens) the lid plate 16. Also at this time, the lid plate 16 rotates upward (or backward) with the main folding curve 26 as the rotation axis while being slightly bent at the auxiliary folding curve 27.

In the packaging container 1 according to the first embodiment described above, the auxiliary folding curve 27 is configured to bend the lid plate 16 in the process of opening and closing the lid plate 16. Further, the lid plate 16 is configured to rotate around the main folding curve 26 while maintaining the folded state on the auxiliary folding curve 27. According to this configuration, the lid plate 16 broken by the auxiliary folding curve 27 is less likely to bend, so that the lid plate 16 can be rotated around the main folding curve 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 lid plate 16 is slightly bent rearward (upward in FIG. 6) along the auxiliary folding curve 27 along the auxiliary folding curve 27, but the lid plate 16 is forward (or downward) along the auxiliary folding curve 27. It may be slightly bent (not shown).

By the way, since the lid plate 16 rotates around the main folding curve 26 in a state of being folded by the auxiliary folding curve 27, the lid plate 16 tends to have a folding habit due to the auxiliary folding curve 27. Due to this folding habit, a gap is formed in the range (near the main folding curve 26) surrounded by the box body 1A, the main folding curve 26, and the auxiliary folding curve 27 (not shown). If the auxiliary folding curve 27 is extended to the left and right ends of the lid plate 16, the gap created by the folding habit of the lid plate 16 is exposed at both the left and right ends of the packaging container 1 (near the main folding curve 26). The design of the packaging container 1 is reduced. On the other hand, in the packaging container 1 according to the first embodiment, there are regions on the left and right sides of the lid plate 16 where the auxiliary folding curve 27 is not formed. According to this configuration, the folding habit at both the left and right ends of the lid plate 16 can be reduced as compared with the case where the auxiliary folding curve 27 extends to the left and right ends of the lid plate 16. As a result, the gap due to the folding habit of the lid plate 16 can be made inconspicuous, and the packaging container 1 at the time of sealing can be made into a good shape without unnecessary gap.

Further, according to the packaging container 1 according to the first embodiment, the lid plate 16 long in the left-right direction tends to bend near the center thereof, but the lid plate 16 is mainly folded while being kept folded by the auxiliary folding curve 27. By rotating around the curve 26, the lid plate 16 can be made difficult to bend. As a result, the packaging container 1 can be smoothly sealed.

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

In the packaging container 1 according to the first embodiment, the auxiliary folding curves 27 were not extended to the left and right ends of the lid plate 16, and the auxiliary folding curves 27 were not formed on the left and right sides of the lid plate 16. The invention is not limited to this. For example, as a first modification, if the gap created by the folding habit of the lid plate 16 can be ignored, the auxiliary folding curve 27 may be extended to the left and right ends of the lid plate 16 (not shown). ..

Further, as shown in FIG. 7, as a second modification, the pair of end folding curves 28 are free ends (insertion piece 17) of the lid plate 16 from both ends in the extending direction of the auxiliary folding curve 27 toward the outside. ) May be extended. For example, the pair of end folding curves 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 curves 28 are separated from the auxiliary folding curve 27, the gap due to the folding habit of the lid 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 curves 28 may be formed in an arc shape that is concave in the direction in which they are separated from each other, or may be formed in a straight line shape (not shown). Further, each end folding curve 28 is not limited to a general-purpose ruled line, and may be another folding curve such as a sewing machine blade line. Further, each end fold curve 28 extends continuously from the end of the auxiliary fold curve 27, but the present invention is not limited to this, and a gap may be provided between the end fold curve 28 and the end of the auxiliary fold curve 27. (Not shown).

Further, in the packaging container 1 according to the first embodiment, the packaging container 1 (lid plate 16) is formed in a rectangular shape that is long in the left-right direction when viewed from a plane, but the present invention is not limited to this. For example, the packaging container 1 (lid plate 16) may be square when viewed from a plane, or may be formed in a rectangular shape long in the front-rear direction (not shown). In this case, the auxiliary folding curve 27 may be formed shorter than the size of the lid 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 curve 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 curve 26 is formed between the back plate 14 and the lid plate 16, and the auxiliary folding curve 27 is formed on the lid plate 16. 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, the main folding curve 26 is formed between the side plate 30 (side plate) and the flap 31 (lid plate), and the auxiliary folding curve 27 is formed on the flap 31.

Further, the packaging container 1 or the like according to the first embodiment is formed of paperboard, but is not limited to this, and may be formed of, for example, a resin plate, a paper or resin corrugated cardboard sheet, or the like. ..

The description of the 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 fold curve 26A Cut line 27 Auxiliary fold curve 28 End fold curve 30 Side plate (side plate)
31 flap (lid plate)
P Both ends position

Claims (5)

A packaging container (1) in which a lid plate (16) is continuously provided at an end of a side plate (14) constituting the side surface of the box body (1A).
A main folding curve (26) extending along the boundary between the side plate and the lid plate and serving as a rotation axis when opening and closing the lid plate with respect to the box body.
The lid plate is provided with an auxiliary folding curve (27) that extends along the main folding curve in the vicinity of the main folding curve and causes the lid plate to be bent in the process of opening and closing the lid plate. A packaging container characterized by that. The packaging container according to claim 1, wherein the auxiliary folding curve is formed between both end positions (P) separated from both ends of the lid plate toward the center in the extending direction. 2. The second aspect of the present invention is characterized in that a pair of end folding curves (28) extending outward from both ends in the extending direction of the auxiliary folding curve toward the free end side of the lid plate is further provided. The described packaging container. The packaging container according to any one of claims 1 to 3, wherein the auxiliary folding curve is formed longer than the dimension in the projecting direction of the lid plate orthogonal to the auxiliary folding curve. The packaging container according to any one of claims 1 to 4, wherein a cut line (26A) is formed along the auxiliary folding curve at the central portion in the extending direction of the main folding curve.

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