JP4711910B2 - Paper packaging box - Google Patents

Description

  The present invention relates to a paper packaging box for storing a packaged object such as a digital camera.

2. Description of the Related Art Conventionally, a packaging box having a meshing structure with a folded back flap as disclosed in Patent Document 1 is known.
In the packaging box disclosed in Patent Document 1, since the folding flap is provided with a meshing structure, when an impact is applied to the side from the inside, the deformation of the packaging box is minimized and damage due to the impact is prevented. The effect that it can be obtained.

In this way, various proposals have been made in addition to the viewpoint of how to reinforce the packaging box itself to prevent breakage, and the viewpoint of preventing breakage by dispersing impact to prevent breakage. . On the other hand, for packaging boxes, there is a demand for downsizing to reduce the volume ratio, weight reduction for cost reduction, and recycling for environmental protection, and cardboard using waste paper as a sheet material is adopted. It is like that.
Japanese Patent Laid-Open No. 11-301634

  As mentioned above, corrugated cardboard using waste paper is prone to breakage and tearing easily, especially when trying to reduce the weight in order to wrap a small packaged item, if the thin sheet material is used, the aforementioned patent document In the packaging box having the configuration described in No. 1, there is a problem that when a stress is applied to the side surfaces, it is easily torn at the bent portion between the adjacent side surfaces.

  The object of the present invention is to solve such problems. Even if a small packaging box is made of corrugated cardboard using used paper, the side wall plate can be easily held upright while the assembly is simple. An object of the present invention is to provide a paper packaging box that can disperse the stress other than the bent portion of the side wall plate and prevent the side wall plate from being damaged even if a stress of a predetermined value or more is applied to the side wall plate.

  The paper packaging box according to claim 1 of the present invention includes a bottom plate having a square planar shape, left and right and front and rear side wall plates formed adjacent to the bottom plate, and both end edges of the left and right side wall plates. The first and second holding pieces which are continuously provided so as to be bent along the inner sides of the front and rear side wall plates, and the first holding piece which is provided continuously with the upper end of one of the front and rear side wall plates. Folding pieces that can be folded inside the side wall plate so as to be sandwiched, an upper lid piece that is connected to the upper end of the other side wall plate of the front and rear side wall plates, and that is connected to the tip of this upper lid piece and is inserted inside the folding piece On the upper end of the first holding piece sandwiched between any one of the front and rear side wall plates and the folding piece. Comprises an upward projection that abuts on the inner side of the bent portion formed by one side wall plate and the folding piece, An engaging portion is provided at the tip of the second holding piece that is bent so as to be positioned inside the other side wall plate on which the upper lid piece is continuously provided, and the tips are connected with play in a direction away from each other. In the sealed state where the upper lid piece is closed, the first holding piece is in a normal state in which the tip of the projection comes into contact with the inner side of the bent portion formed by the one side wall plate and the folding piece. The side wall plate is controlled to stand substantially perpendicular to the bottom plate, and when a stress of a predetermined value or more is applied in the opening direction with respect to the left and right side wall plates, the projections are subjected to stress deformation from the tip, so that the left and right side wall plates are The second holding piece is configured to open to the outside, and the second holding piece has a horizontal portion having a certain dimension from a continuous portion with the left and right side wall plates, and an inclined portion continuing to the horizontal portion on the upper edge. Provided, so that the vertical width of the engagement portion at the tip is narrower than the vertical width of the side wall plate In the sealed state in which the upper lid piece is closed, when a stress greater than a predetermined value is applied in the opening direction to the left and right side wall plates, the boundary between the horizontal portion and the inclined portion is displaced, and The left and right side wall plates are configured to open outward when the joint portion is displaced to the upper lid piece side.

The paper packaging box according to claim 2 of the present invention is characterized in that the material of the paper packaging box is cardboard using waste paper.
The paper packaging box according to claim 3 of the present invention is characterized in that the direction of the projection of the first holding piece is perpendicular to the direction of the corrugated cardboard.

The paper packaging box according to claim 4 of the present invention is characterized in that the horizontal portion of the second holding piece is arranged in the direction of the corrugated cardboard.
In the paper packaging box according to claim 5 of the present invention, the first and second holding pieces connected to both end edges of the left and right side wall plates are corrugated cardboard at the bent portions with respect to the left and right side wall plates. It is characterized in that the direction is perpendicular to the folding line.

  The paper packaging box according to claim 6 of the present invention includes a bottom plate having a rectangular planar shape, left and right and front and rear side wall plates formed adjacent to the bottom plate, and both end edges of the left and right side wall plates. The first and second holding pieces which are continuously provided so as to be bent along the inner sides of the front and rear side wall plates, and the first holding piece which is provided continuously with the upper end of one of the front and rear side wall plates. Folding pieces that can be folded inside the side wall plate so as to be sandwiched, an upper lid piece that is connected to the upper end of the other side wall plate of the front and rear side wall plates, and that is connected to the tip of this upper lid piece and is inserted inside the folding piece Each of the first and second holding pieces bent along the inner sides of the front and rear side wall plates, respectively. An engaging portion connected with play in a direction in which the tips are separated from each other; The second holding piece includes a horizontal portion having a fixed dimension from the connecting portion with the left and right side wall plates on the upper edge thereof, and an inclined portion continuous to the horizontal portion. In the sealed state in which the upper lid piece is closed and formed to be narrower than the vertical width of the side wall plate, when the stress greater than a predetermined value is applied to the left and right side wall plates, the horizontal portion and the horizontal portion are inclined. The left and right side wall plates are configured to open to the outside by displacing the boundary portion of the portion and displacing the engagement portion at the tip toward the upper lid piece side.

The paper packaging box according to claim 7 of the present invention is characterized in that the material of the paper packaging box is cardboard using waste paper.
The paper packaging box according to claim 8 of the present invention is characterized in that the horizontal portions of the first and second holding pieces are arranged in the direction of the corrugated cardboard.

  The paper packaging box according to claim 9 of the present invention is such that the first and second holding pieces connected to both end edges of the left and right side wall plates are corrugated cardboard at the bent portions with respect to the left and right side wall plates. It is characterized in that the direction is perpendicular to the folding line.

  As described above, according to the paper packaging box of the first aspect of the present invention, the box can be assembled only by bending without requiring a sealing tool or an adhesive, and the structure is simplified and easy to assemble. A paper packaging box can be provided. In particular, the side wall plate can be reliably held upright by the holding piece, and even a small packaging box made of thin cardboard can be given strength. Specifically, when stress of a predetermined value or more is applied in the opening direction with respect to the left and right side wall plates, the protrusion of the first holding piece is stress-deformed from the tip, and the left and right side wall plates are opened to the outside. The holding piece is displaced at the boundary between the horizontal portion and the inclined portion and the engaging portion at the tip is displaced to the upper lid piece side, whereby the left and right side wall plates are opened outwardly to disperse the stress applied to the left and right side wall plates. Can be prevented from being damaged.

According to the paper packaging box described in claim 2 of the present invention, the strength of the packaging box can be maintained even if the material of the paper packaging box is corrugated cardboard using waste paper, and a paper packaging box for recycling is provided. it can.
According to the paper packaging box of the third aspect of the present invention, the projection is stress-deformed by configuring the projection of the first holding piece to be perpendicular to the direction of the corrugated cardboard. It becomes easy.

  According to the paper packaging box of the fourth aspect of the present invention, the horizontal portion of the second holding piece is configured to be in the step direction of the cardboard, so that the boundary between the horizontal portion of the upper edge and the inclined portion. The part is easily deformed by stress.

  According to the paper packaging box of the fifth aspect of the present invention, the first and second holding pieces connected to the both end edges of the left and right side wall plates are formed of corrugated cardboard at the bent portions with respect to the left and right side wall plates. By configuring the step direction to be perpendicular to the folding line, it is possible to maintain the strength against the stress of the bent portions at both end edges of the left and right side wall plates.

  According to the paper packaging box according to claim 6 of the present invention, as in the paper packaging box according to claim 1, the box can be assembled only by bending without requiring a sealing tool or an adhesive. It is possible to provide a paper packaging box that is simplified and easy to assemble. In particular, the side wall plate can be reliably held upright by the holding piece, and even a small packaging box made of thin cardboard can be given strength. Specifically, when a stress of a predetermined value or more is applied in the opening direction with respect to the left and right side wall plates, the boundary between the horizontal portion and the inclined portion of the first holding piece and the second holding piece is displaced. When the joint portion is displaced to the upper lid piece side, the left and right side wall plates open to the outside, and the stress applied to the left and right side wall plates can be dispersed to prevent the side wall plates from being damaged.

  According to the paper packaging box described in claim 7 of the present invention, as in the case of the paper packaging box described in claim 2, the strength of the packaging box is obtained even if the material of the paper packaging box is corrugated cardboard using waste paper. And can provide a paper packaging box that can be recycled.

  According to the paper packaging box described in claim 8 of the present invention, like the paper packaging box described in claim 4, the horizontal portions of the first and second holding pieces are in the direction of the corrugated cardboard. With this configuration, the boundary between the horizontal portion of the upper edge and the inclined portion is easily deformed by stress.

  According to the paper packaging box of the ninth aspect of the present invention, the first and second holding pieces connected to the both edges of the left and right side wall plates in the same manner as the paper packaging box of the fifth aspect. In the bent portion with respect to the left and right side wall plates, the step direction of the corrugated cardboard is configured to be perpendicular to the bending curve, so that the strength against the stress of the bent portions at both end edges of the left and right side wall plates can be maintained.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings (FIGS. 1 to 10).
In the figure, reference numeral 1 denotes a paper packaging box made of cardboard or the like made of used paper, for example, and containing a small package (not shown) such as a digital camera. The box 1 has a bottom plate 2 having a long planar shape, left and right side wall plates 3 and 4 formed adjacent to the short side of the bottom plate 2, and front and rear formed adjacent to the long side of the bottom plate 2. First holding pieces 7, 8 connected to both end edges of the left and right side wall plates 3, 4 so as to be foldable along the inner sides of the front and rear side wall plates 5, 6, and 2 holding pieces 9, 10 and front and rear side wall plates 5, 6, one side wall plate (front side wall plate 5 in the embodiment shown in the drawings) connected to the upper end of the first holding piece 7, 8 and the other side wall plate of the front and rear side wall plates (shown in the drawing). In the embodiment, the upper lid piece 12 connected to the upper end of the rear side wall plate 6), the insertion piece 13 connected to the tip of the upper cover piece 12 and inserted into the folding piece 11, and the left and right Flaps 14 and 15 connected to the upper ends of the side wall plates 3 and 4. The front end of the folding piece 11 is provided with a locking piece 11a that fits into a locking hole 2a formed in the bottom plate 2 in a state of being folded inside the front side wall plate 5.

  Further, the upper ends of the first holding pieces 7 and 8 sandwiched between the front side wall plate 5 and the folding piece 11 are inside the bent portion formed by the front side wall plate 5 and the folding piece 11. The tip of the second holding pieces 9 and 10 that are provided so as to be positioned inside the rear side wall plate 6 provided with the upward protrusions 7a and 8a that contact the upper cover piece 12 are provided between the tips. Are provided with engaging portions 9a and 10a that are connected with play in a direction away from each other.

  The first holding pieces 7 and 8 are bent such that the front ends of the projections 7a and 8a are formed by the front side wall plate 5 and the folding piece 11 in a normal state in a sealed state where the upper lid piece 12 is closed. When the left and right side wall plates 3 and 4 are restrained to stand upright substantially perpendicularly to the bottom plate 2 by contacting the inner side of the part, and a stress exceeding a predetermined value is applied to the left and right side wall plates 3 and 4 in the opening direction. Further, the projections 7a and 8a are deformed by stress from the tip so that the left and right side wall plates 3 and 4 are opened outward (see FIG. 9). In addition, it is comprised so that direction of protrusion 7a, 8a of the 1st holding pieces 7 and 8 may become a right angle with respect to the cardboard direction A. FIG.

  Further, the second holding pieces 9, 10 are connected to the horizontal portions 9b, 10b of a certain size and the horizontal portions 9b, 10b at the upper edges thereof from the connecting portions with the left and right side wall plates 3, 4. Inclined portions 9c and 10c are provided so that the vertical widths of the engaging portions 9a and 10a at the tip are narrower than the vertical widths of the side wall plates 3, 4, 5 and 6. Here, notches 9d and 10d into which the engaging portions 9a and 10a are fitted are formed as a configuration for providing play in the engaging portions 9a and 10a. In the sealed state where the upper lid piece 12 is closed, when a stress of a predetermined value or more is applied to the left and right side wall plates 3 and 4 in the opening direction, the horizontal portions 9b and 10b and the inclined portions 9c and 10c The boundary portions are subjected to stress deformation and the engagement portions 9a, 10a at the distal end are displaced toward the upper lid piece 12 within the range of play by the notches 9d, 10d, so that the left and right side wall plates 3, 4 are opened outward (FIG. 10). Reference). The horizontal portions 9b and 10b of the second holding pieces 9 and 10 are configured to be in the cardboard step direction A.

  Further, the first and second holding pieces 7, 8, 9, 10 connected to the both end edges of the left and right side wall plates 3, 4 are corrugated cardboard at the bent portions with respect to the left and right side wall plates 3, 4. The direction A is configured to be perpendicular to the folding line.

  A locking hole 16 is formed at the center on the connecting line between the upper cover piece 12 and the insertion piece 13, and the flaps 14 and 15 connected to the upper ends of the left and right side wall plates 3 and 4 are horizontally connected. In a state where the insertion piece 13 is inserted inside the folding piece 11, the locking piece 17 formed across the front side wall plate 5 and the folding piece 11 is inserted into the locking hole 16 and wrapped in paper. The box 1 is now sealed.

  In the above configuration, in the normal state, the front ends of the projections 7a and 8a of the first holding pieces 7 and 8 are in contact with the inner side of the bent portion formed by the front side wall plate 5 and the folding piece 11, and the left and right side walls. Although the plates 3 and 4 are restricted to stand upright substantially at right angles to the bottom plate 2, the protrusions 7a and 8a are applied when stress of a predetermined value or more is applied to the left and right side wall plates 3 and 4 in the opening direction. Strongly contacts the inner side of the bent portion formed by the front side wall plate 5 and the folding piece 11 and is deformed by stress from the tip, so that the left and right side wall plates 3 and 4 are opened outward as shown in FIG. become. At the same time, in the second holding pieces 9 and 10, the horizontal portions 9b and 10b and the inclined portions 9c and 10c are applied when stress of a predetermined value or more is applied to the left and right side wall plates 3 and 4 in the opening direction. As shown in FIG. 10, the left and right side wall plates 3 and 4 are opened to the outside as a result of displacement of the boundary portion and displacement of the engaging portions 9a and 10a at the distal end toward the upper lid piece 12 side.

Further, by configuring the projections 7a and 8a of the first holding pieces 7 and 8 to be perpendicular to the corrugated cardboard direction A, the projections 7a and 8a are easily deformed by stress, The opening of the side wall plates 3 and 4 becomes smoother.
In addition, by configuring the horizontal portions 9b and 10b of the second holding pieces 9 and 10 to be in the corrugated cardboard direction A, the boundary between the horizontal portions 9b and 10b and the inclined portions 9c and 10c is subjected to stress deformation. It becomes easy and the opening of the left and right side wall plates 3 and 4 becomes smoother.

  Further, the first and second holding pieces 7, 8, 9, 10 connected to the both end edges of the left and right side wall plates 3, 4 are connected to the corrugated cardboard at the bent portions with respect to the left and right side wall plates 3, 4. By configuring the direction A so as to be perpendicular to the folding line, the strength against the stress of the bent portions at both end edges of the left and right side wall plates 3 and 4 can be maintained.

  Even if the paper packaging box 1 is made of cardboard or other cardboard using waste paper, the first and second holding pieces 7, 8 and 9, 10 as described above are provided. The strength of the packaging box can be maintained, and the paper packaging box 1 for recycling can be provided.

  Although the embodiment shown in the drawings has been described above, the bottom plate 2, that is, the paper packaging box 1, may not have a long planar shape but may be a square. In addition, as the configuration of the first holding pieces 7 and 8, the same configuration as that of the second holding pieces 9 and 10 can be adopted.

It is an expanded view of the paper packaging box in one embodiment of this invention. It is the perspective view which looked at the state in the middle of the assembly of the packaging box made from the paper from back. It is the perspective view which looked at the state just before the assembly completion of the paper packaging box from the back. It is the perspective view which looked at the assembly completion state of the paper packaging box from the front. It is a top view which shows the assembly completion state of the packaging box made from the paper. It is XX arrow line view of FIG. It is a YY arrow line view of FIG. It is a ZZ arrow line view of FIG. It is sectional drawing which looked at the state which stress was added to the direction opened with respect to the left and right side wall board of the packaging box made from the same paper, and the left and right side wall board opened outside from the YY direction of FIG. It is sectional drawing which looked at the state which stress was added to the opening direction with respect to the left and right side wall board of the packaging box made from the same paper, and the left and right side wall board opened outside from the ZZ direction of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper packaging box 2 Bottom plate 3,4 Side wall plate 5,6 Side wall plate 7,8 1st holding piece 7a, 8a Projection 9,10 2nd holding piece 9a, 10a Engagement part 9b, 10b Horizontal part 9c, 10c Inclined part 9d, 10d Notch part 11 Folding piece 12 Upper lid piece 13 Inserting piece 14, 15 Flap

Claims (9)

Planar bottom plate, left and right and front and rear side wall plates formed adjacent to the bottom plate, and connected to both end edges of the left and right side wall plates so as to be foldable along the inside of the front and rear side wall plates, respectively. First and second holding pieces, a folding piece that is connected to the upper end of one of the front and rear side wall plates and can be bent inside the side wall plate so as to sandwich the first holding piece, An upper cover piece that is connected to the upper end of the other side wall plate, an insertion piece that is connected to the tip of the upper cover piece and is inserted inside the folding piece, and an upper cover piece that is connected to the upper ends of the left and right side wall plates. Provided with a flap,
An upward projection abutting on the inner side of the bent portion formed by the one side wall plate and the folding piece at the upper end of the first holding piece sandwiched between any one of the front and rear side wall plates and the folding piece. With
At the tip of the second holding piece that is bent so as to be positioned inside the other side wall plate in which the upper lid piece is continuously provided, there is provided an engaging portion that is connected with play in a direction in which the tips are separated from each other. ,
In the sealed state in which the upper lid piece is closed, the first holding piece is in a normal state in which the tip of the protrusion comes into contact with the inside of the bent portion formed by the one side wall plate and the folding piece, and the left and right side walls The plate is controlled to stand upright at a right angle with respect to the bottom plate, and when a stress of a predetermined value or more is applied in the opening direction with respect to the left and right side wall plates, the protrusions are deformed by stress from the tip, and the left and right side wall plates are outside. Configured to open
The second holding piece is provided with a horizontal portion having a fixed dimension from the connecting portion with the left and right side wall plates and an inclined portion continuous to the horizontal portion at the upper edge thereof, and the vertical width of the engaging portion at the tip is In the sealed state in which the upper lid piece is closed and formed to be narrower than the vertical width of the side wall plate, when the stress greater than a predetermined value is applied to the left and right side wall plates, the horizontal portion and the horizontal portion are inclined. A paper packaging box, wherein the left and right side wall plates are opened to the outside when the boundary portion of the portion is deformed by stress and the engaging portion at the tip is displaced to the upper lid piece side. 2. The paper packaging box according to claim 1, wherein the material of the paper packaging box is cardboard using waste paper. 3. The paper packaging box according to claim 2, wherein the direction of the projection of the first holding piece is perpendicular to the direction of the corrugated cardboard. 4. The paper packaging box according to claim 3, wherein the horizontal portion of the second holding piece is configured to be in the direction of the corrugated cardboard. The first and second holding pieces connected to both end edges of the left and right side wall plates are configured such that the step direction of the cardboard is perpendicular to the folding line at the bent portion with respect to the left and right side wall plates. The paper packaging box according to any one of claims 2 to 4. Planar bottom plate, left and right and front and rear side wall plates formed adjacent to the bottom plate, and connected to both end edges of the left and right side wall plates so as to be foldable along the inside of the front and rear side wall plates, respectively. First and second holding pieces, a folding piece that is connected to the upper end of one of the front and rear side wall plates and can be bent inside the side wall plate so as to sandwich the first holding piece, An upper cover piece that is connected to the upper end of the other side wall plate, an insertion piece that is connected to the tip of the upper cover piece and is inserted inside the folding piece, and an upper cover piece that is connected to the upper ends of the left and right side wall plates. Provided with a flap,
The distal ends of the first and second holding pieces that are bent along the inner sides of the front and rear side wall plates are each provided with an engaging portion that is connected with play in a direction in which the distal ends are separated from each other.
The first and second holding pieces are provided at the upper edge thereof with a horizontal portion having a fixed dimension from the connecting portion with the left and right side wall plates, and an inclined portion continuing to the horizontal portion, In a sealed state in which the vertical width is narrower than the vertical width of the side wall plate and the upper lid piece is closed, when the stress above the predetermined value is applied to the left and right side wall plates in the opening direction, the horizontal The paper packaging is characterized in that the right and left side wall plates are opened to the outside by the stress deformation of the boundary between the inclined portion and the inclined portion and the engaging portion at the tip being displaced to the upper lid piece side. box. 6. The paper packaging box according to claim 5, wherein the material of the paper packaging box is cardboard using waste paper. 7. The paper packaging box according to claim 6, wherein the horizontal portions of the first and second holding pieces are arranged in the direction of the corrugated cardboard. The first and second holding pieces connected to both end edges of the left and right side wall plates are configured such that the step direction of the cardboard is perpendicular to the folding line at the bent portion with respect to the left and right side wall plates. 9. A paper packaging box according to claim 7 or 8.

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