JP3236764U - Box sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a box sheet capable of suppressing breakage of a boundary portion between side panels. SOLUTION: A box sheet 10 is connected in the left-right direction via an easily bendable line 15, and extends from four side panels 1 to 4 assembled in a square cylinder shape and an upper edge of the side panel, respectively. It is a box sheet assembled into a box body having lid flaps 5 to 8 to be formed, and the side panel and the lid are provided with a connection portion between the upper edge of the side panel and the side edge of the lid flap as a base end. A slit 16 is provided which extends in a meandering manner while intersecting the boundary line with the flap. [Selection diagram] Fig. 1

Description

The present invention relates to a box sheet.

Box bodies assembled from box sheets such as corrugated cardboard sheets are widely used for storing and transporting articles. Generally, this box sheet has four side panels assembled in a square cylinder to form the body of the box, and a lid flap extending from the upper edge of each side panel to form the lid of the box. To prepare for.

A force may be applied to the body of the box in the direction of swelling outward due to the shape and arrangement of the articles to be accommodated. When such a force is applied to the body portion, there is a high possibility that breakage will occur from the boundary portion between the side panels.

Japanese Unexamined Patent Publication No. 2015-11345

Patent Document 1 provides a cut extending inward in the width direction of the lid flap from the side edge of the lid flap and bending the tip side in an L shape on the side panel side to form a boundary portion between the side panels. It is described that breakage can be suppressed.

However, according to the configuration described in Patent Document 1, a U-shaped recess is formed by the portion on the side edge of the lid flap on the proximal end side of the cut and the upper edge of the side panel, so that the recess is formed. As a starting point, there is a risk of breakage at the boundary between the side panels.

The present invention has been made in view of such inconveniences, and an object of the present invention is to provide a box sheet capable of suppressing breakage of a boundary portion between side panels.

The box sheet according to one aspect of the present invention is connected in the left-right direction via an easily bendable line, and has four side panels assembled in a square cylinder shape and a lid extending from the upper edge of the side panel. A box sheet provided with a flap and assembled into a box body, and a boundary line between the side panel and the lid flap with a connection portion between the upper edge of the side panel and the side edge of the lid flap as a base end. There is a slit that extends in a meandering manner while intersecting with.

The box sheet according to one aspect of the present invention can suppress breakage of the boundary portion between the side panels.

FIG. 1 is a schematic plan view showing a box sheet according to an embodiment of the present invention. FIG. 2 is a schematic partially enlarged view of the box sheet of FIG. FIG. 3 is a schematic perspective view showing a box body formed by assembling the box sheet of FIG. 1. FIG. 4 is a schematic partially enlarged perspective view showing a connecting portion between adjacent side panels of the box body of FIG. 3 and its vicinity. FIG. 5 is a schematic partially enlarged side view showing a connecting portion between adjacent side panels of the box body of FIG. 3 and its vicinity.

[Explanation of Embodiment of the present invention]
First, embodiments of the present invention will be listed and described.

The box sheet according to one aspect of the present invention is connected in the left-right direction via an easily bendable line, and has four side panels assembled in a square cylinder shape and a lid extending from the upper edge of the side panel. A box sheet provided with a flap and assembled into a box body, and a boundary line between the side panel and the lid flap with a connection portion between the upper edge of the side panel and the side edge of the lid flap as a base end. There is a slit that extends in a meandering manner while intersecting with.

The box sheet has a slit that extends in a serpentine manner while intersecting the boundary line between the side panel and the lid flap, and the slit is formed between the upper edge of the side panel and the side edge of the lid flap. Since the connection portion is used as the base end, the side panel and the lid flap separated by the slit can be easily and appropriately independently deformed in the state of being assembled into the box body. Therefore, the box sheet can suppress the breakage of the boundary portion between the side panels.

The slit is provided in a first portion protruding from the base end into the side panel, a second portion continuously provided from the first portion and protruding into the lid flap beyond the boundary line, and the above. It is preferable to have a third portion which is continuously provided from the second portion and protrudes into the side panel beyond the boundary line. In this way, the slit is provided continuously from the first portion protruding from the base end into the side panel and the second portion extending continuously from the first portion and protruding into the lid flap beyond the boundary line. By having a portion and a third portion that is continuously provided from the second portion and projects into the side panel beyond the boundary line, it is easier and more reliable to break the boundary portion between the side panels. Can be suppressed.

It is preferable that the connecting portion between the first portion and the second portion and the connecting portion between the second portion and the third portion have an arc shape. In this way, the connecting portion between the first portion and the second portion and the connecting portion between the second portion and the third portion have an arcuate shape, so that the boundary portion between the side panels is broken. It can be suppressed more easily and surely.

It is preferable that the slits are formed from the adjacent side edges of the pair of lid flaps adjacent to each other in the left-right direction with the easy-to-bend line interposed therebetween. In this way, the slits are formed from the adjacent side edges of the pair of lid flaps adjacent to each other in the left-right direction with the easy-to-bend line interposed therebetween, so that the boundary portion between the side panels is more easily broken. And it can be surely suppressed.

Adjacent side edges of the pair of lid flaps are arranged at intervals in the left-right direction, and among the upper edges of the pair of side panels extending with these lid flaps, between the slits. It is preferable that the portion located in is projected in an arc shape as a whole. In this way, the adjacent side edges of the pair of lid flaps are arranged at intervals in the left-right direction, and among the upper edges of the pair of side panels extending from these lid flaps, the above Since the portion located between the slits protrudes in an arc shape as a whole, it is possible to more easily and surely suppress the breakage of the boundary portion between the side panels.

In the present invention, the "left-right direction" means the horizontal direction in a general usage mode assumed in a box body formed by assembling a box sheet. Further, "upper" means above with reference to the above-mentioned left-right direction.

[Details of the Embodiment of the present invention]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[Box sheet]
The box sheet 10 of FIGS. 1 and 2 can be assembled into a box body, specifically, the box body 20 shown in FIGS. 3 to 5. The box sheet 10 is connected in the left-right direction via an easily bendable line 15, and four side panels assembled in a square cylinder shape (first side panel 1, first side panel 1 from one side to the other in the connection direction). 2 Side panel 2, 3rd side panel 3 and 4th side panel 4) and lid flaps extending from the upper edges of the side panels 1 to 4 (the first lid extending from the upper edge of the first side panel 1). Flap 5, second lid flap 6 extending from the upper edge of the second side panel 2, third lid flap 7 extending from the upper edge of the third side panel 3 and extending from the upper edge of the fourth side panel 4. A fourth lid flap 8) is provided. Further, the box sheet 10 has a bottom flap extending from the lower edges of the four side panels 1 to 4 (a first bottom flap 11 extending from the lower edge of the first side panel 1 and a second side panel 2). A second bottom flap 12 extending from the lower edge, a third bottom flap 13 extending from the lower edge of the third side panel 3, and a fourth bottom flap 14 extending from the lower edge of the fourth side panel 4). The first side surface panel 1 is provided with a joint 18 extending from the outer side edge in the left-right direction. The box sheet 10 has side panels 1 to 4 and lid flaps 5 to 8 with the connection portion between the upper edges 1a to 4a of the side panels 1 to 4 and the side edges 5a to 8a of the lid flaps 5 to 8 as base ends. A slit 16 is provided which extends in a meandering manner while intersecting the boundary line (that is, the easily bendable line formed between the side panels 1 to 4 and the lid flaps 5 to 8). In addition, in this specification, "bottom" means the bottom in a general usage mode assumed in a box body made by assembling a box sheet. Further, in FIG. 1, a thick solid line indicates a cutting line formed by cutting a sheet, and a thin solid line indicates an easy-to-bend line. Examples of the easily bendable line include a ruled line formed by pressing one side of the sheet.

The box sheet 10 is composed of one sheet. The sheet used for the box sheet 10 is not particularly limited as long as it has enough strength to maintain the shape of the box body 20 formed by assembling the box sheet 10, and is not particularly limited, for example, a corrugated cardboard sheet, cardboard, or the like. Examples thereof include a paper sheet, a synthetic resin sheet, and a laminated sheet of a paper sheet and a synthetic resin sheet. Among them, a paper sheet is preferable, and a corrugated cardboard sheet is particularly preferable, from the viewpoints of processability, shock absorption, handleability, recyclability, economy and the like. The corrugated cardboard forming the box sheet 10 is a corrugated cardboard in which a core formed of a base paper in a wavy shape is bonded to a liner. For example, a core formed in a wave shape is bonded to a single liner. Single-sided corrugated cardboard sheet, double-sided corrugated cardboard sheet with a liner attached to the top of the single-sided corrugated board, double-sided corrugated board sheet with the top of the single-sided corrugated cardboard attached to one side of the double-sided corrugated board, one side to one side of the double-sided corrugated board Examples thereof include a double-sided corrugated cardboard sheet in which the tops of corrugated cardboard sheets are further bonded. Among these, double-sided corrugated cardboard sheets are preferable from the viewpoints of workability, economy, durability and the like. When the box sheet 10 is a corrugated cardboard sheet, it is preferable that the ridgeline of the core of the corrugated cardboard sheet extends in the vertical direction.

The procedure for assembling the box sheet 10 into the box body 20 will be described. First, the first side panel 1 is folded on the inner surface of the second side panel 2, the fourth side panel 4 is folded on the inner surface of the third side panel 3, and the joint 18 is folded on the fourth side panel 4. Stick it on the inside. Next, the side panels 1 to 4 connected in an endless manner are spread out in a square cylinder shape, and then the second bottom flap 12 and the fourth bottom flap 14 are bent substantially vertically inward, and then the first bottom flap 11 is used. And the third bottom flap 13 are bent inward substantially vertically so as to be folded on the outer surface side of the second bottom flap 12 and the fourth bottom flap 14, and the bottom edges of the box body 20 are assembled. .. A boxing tape X for preventing the bottom of the box body 20 from being opened may be attached to the joint between the tip edges of the first bottom flap 11 and the third bottom flap 13. Subsequently, after accommodating desired articles and the like in the side panels 1 to 4 assembled in a square tubular shape, the lid flaps 5 to 8 are placed, and the one side portion in the width direction is the other lid flaps 5 to 8. Is supported from below, and the lid portion of the box body 20 is assembled by folding it in a windmill shape so that the side portion on the other side in the width direction is located above the other lid flaps 5 to 8.

(Side panel)
Each of the side panels 1 to 4 has a substantially rectangular shape. The first side panel 1 and the third side panel 3 and the second side panel 2 and the fourth side panel 4 facing each other in a state of being assembled to the box body 20 are formed in substantially the same shape, respectively. The vertical lengths of the side panels 1 to 4 are substantially equal. In FIG. 1, the left-right length of the first side panel 1 and the third side panel 3 is larger than the left-right length of the second side panel 2 and the fourth side panel 4. That is, in FIG. 1, the first side surface panel 1 and the third side surface panel 3 are provided as length surface panels constituting the length surface of the box body 20, and the second side surface panel 2 and the fourth side surface panel 4 are provided. It is provided as a width surface panel constituting the width surface of the box body 20.

(Cover flap)
Each of the lid flaps 5 to 8 has a substantially rectangular shape. The lid flaps 5 to 8 have substantially the same length in the extending direction. The length of the lid flaps 5 to 8 in the extending direction is not particularly limited, but in FIG. 1, the length of the second side panel 2 and the fourth side panel 4 (that is, the width panel) in the left-right direction is not particularly limited. It is said to be less than 1/2. With this configuration, as shown in FIG. 3, a substantially rectangular opening is provided in the center of the lid portion of the box body 20.

The width of the lid flaps 5 to 8 is set to be less than the length in the left-right direction of the side panels 1 to 4 on which the lid flaps 5 to 8 extend. With this configuration, a gap is provided between the side edges 5a to 8a of the adjacent lid flaps 5 to 8. The distance between the side edges 5a to 8a of the adjacent lid flaps 5 to 8 may be, for example, 5 mm or more and 20 mm or less.

〔slit〕
As described above, the box sheet 10 has the side panels 1 to 4 with the connecting portion between the upper edges 1a to 4a of the side panels 1 to 4 and the side edges 5a to 8a of the lid flaps 5 to 8 as the base end. It has a slit 16 that meanders and extends while intersecting the boundary line with the lid flaps 5 to 8. Hereinafter, the slit 16 will be described in detail.

As shown in FIG. 1, the slit 16 is a side edge of all the side edges 5a to 8a of the first lid flap 5 to the fourth lid flap 8 other than the lateral outer side edge 8a of the fourth lid flap 8 in the left-right direction. It is provided for.

As shown in FIG. 2, the slit 16 is continuously provided from the first portion 16a protruding from the base end into the side panels 1 to 4 and the first portion 16a, and the side panels 1 to 4 and the lid flaps 5 to 5 are provided. A second portion 16b that protrudes into the lid flaps 5 to 8 beyond the boundary line with 8 and a second portion 16b that is continuously provided from the second portion 16b and protrudes into the side panels 1 to 4 beyond the boundary line. It has three portions 16c. The first portion 16a and the second portion 16b are connected at the first end point 17a, and the second portion 16b and the third portion 16c are connected at the second end point 17b. In the box sheet 10, the slit 16 is composed of a first portion 16a, a second portion 16b, and a third portion 16c. The box sheet 10 has a side surface in a state of being assembled in the box body 20 as shown in FIGS. 4 and 5 because the slit 16 has the first portion 16a, the second portion 16b, and the third portion 16c. A gap S is formed in the vertical direction between the panels 1 to 4 and the lid flaps 5 to 8. This makes it easier for the lid flaps 5 to 8 to move in the left-right direction independently of the side panels 1 to 4. As a result, even when an outward force is applied to the side panels 1 to 4 due to the shape and arrangement of the articles housed in the box body 20, this force is applied to the lid flaps 5 to 8. It becomes difficult to work. As a result, the box sheet 10 can more easily and surely suppress the breakage of the boundary portion between the side panels 1 to 4.

The slit 16 has a base end at the connection portion between the upper edges 1a to 4a of the side panels 1 to 4 and the side edges 5a to 8a of the lid flaps 5 to 8, and ends at the tip of the third portion 16c. That is, the slit 16 projects from the base end into the side panels 1 to 4, extends beyond the boundary line between the side panels 1 to 4 and the lid flaps 5 to 8, and then protrudes into the lid flaps 5 to 8. It is completed by returning to the inside of the side panels 1 to 4. Since the slit 16 is configured in this way, the box sheet 10 can suppress the occurrence of breakage at the boundary portion between the side panels 1 to 4 starting from the end of the slit 16. That is, if the end of the slit 16 is located on the boundary line between the side panels 1 to 4 and the lid flaps 5 to 8, breakage is likely to occur from the end of the slit 16 along the boundary line. On the other hand, since the end of the slit 16 is located in the side panels 1 to 4, it is possible to sufficiently suppress the breakage of the boundary line starting from the end of the slit 16.

The third portion 16c is a fracture curved in the tip portion (that is, the portion opposite to the second end point 17b) in the extending direction (direction from the first portion 16a toward the third portion 16c). It has a preventive shape 16d. Since the box sheet 10 is provided with the breakage prevention shape 16d in the third portion 16c of the slit 16, it is easy to prevent unintentional breakage starting from the slit 16.

The lower limit of the meandering width W (the meandering width based on the first end point 17a and the second end point 17b) of the slit 16 is preferably 2 mm, more preferably 3 mm. If the meandering width W does not reach the lower limit, it may be difficult to move the lid flaps 5 to 8 independently of the side panels 1 to 4. On the other hand, as the upper limit of the meandering width W, 10 mm is preferable, and 5 mm is more preferable. When the meandering width W exceeds the upper limit, the contact area between the side panels 1 to 4 and the lid flaps 5 to 8 becomes partially large, so that the lid flaps 5 to 8 become independent of the side panels 1 to 4. It may be difficult to move.

As the lower limit of the length L of the slit 16 in the extending direction, 10 mm is preferable, 15 mm is more preferable, and 18 mm is further preferable. On the other hand, as the upper limit of the extension direction length L, 40 mm is preferable, and 30 mm is more preferable. If the extension direction length L does not reach the lower limit, it may be difficult to sufficiently suppress the breakage of the boundary portion between the side panels 1 to 4. On the contrary, if the extension direction length L exceeds the upper limit, the handleability of the box sheet 10 may deteriorate.

It is preferable that the connecting portion between the first portion 16a and the second portion 16b and the connecting portion between the second portion 16b and the third portion 16c have an arc shape. With such a configuration, the side panels 1 to 4 and the lid flaps 5 to 8 are less likely to interfere with each other in the state of being assembled in the box body 20. This makes it easier for the lid flaps 5 to 8 to move in the left-right direction independently of the side panels 1 to 4. As a result, the box sheet 10 can more easily and surely suppress the breakage of the boundary portion between the side panels 1 to 4.

As shown in FIG. 1, the box sheet 10 has a pair of lid flaps (first lid flap 5 and second lid flap 6, second lid flap 6 and second lid flap 6) adjacent to each other in the left-right direction with the easily bendable line 15 interposed therebetween. Slits 16 are formed from the three lid flaps 7 and the adjacent side edges 5a to 8a of the third lid flap 7 and the fourth lid flap 8), respectively. Since the box sheet 10 is provided with the plurality of slits 16 in this way, it is possible to more easily and surely suppress the breakage of the boundary portion between the side panels 1 to 4.

As shown in FIGS. 1 and 2, a pair of adjacent lid flaps (first lid flap 5 and second lid flap 6, second lid flap 6 and third lid flap 7, and third lid flap 7 and fourth). The adjacent side edges 5a to 8a of the lid flap 8) are arranged with a space in the left-right direction. Further, as shown in FIG. 2, a pair of side panels extending from these lid flaps 5 to 8 (the first side panel 1 and the first side panel on which the first lid flap 5 and the second lid flap 6 extend). 2 Side panel 2, second side panel 2 and third side panel 3 extending from second lid flap 6 and third lid flap 7, and third lid flap 7 and fourth lid flap 8 extending from each other. Of the upper edges 1a to 4a of the third side panel 3 and the fourth side panel 4), the portions located between the slits 16 project in an arc shape as a whole. By having the box sheet 10 configured in this way, it is possible to more easily and surely suppress the breakage of the boundary portion between the side panels 1 to 4.

The upper edge of the arc-shaped projecting portion is defined by the extension curve of the slit 16. With such a configuration, it is easy to more reliably suppress the breakage of the boundary portion between the side panels 1 to 4.

An easy-to-bend line may be provided in the portion protruding in the shape of an arc. However, it is preferable that the easily bendable line is not provided in the portion protruding in the shape of an arc. That is, the easy-to-bend line provided on the boundary line between the side panels 1 to 4 and the lid flaps 5 to 8 and the easy-to-bend line 15 provided on the boundary line between the side panels 1 to 4 adjacent to each other in the left-right direction are the above circles. It is preferable that it does not extend to the portion protruding in an arc shape. Since the easily bendable line does not extend to the portion protruding in the arc shape, it is possible to more easily and surely suppress the breakage of the boundary portion between the side panels 1 to 4.

(Bottom flap)
The bottom flaps 11 to 14 have a substantially rectangular shape, respectively. The bottom flaps 11 to 14 have substantially the same length in the extending direction. The length of the bottom flaps 11 to 14 in the extending direction can be halved of the length of the second side panel 2 and the fourth side panel 4 in the left-right direction. The width of the bottom flaps 11 to 14 is substantially equal to the lateral length of the side panels 1 to 4 extending from the bottom flaps 11 to 14.

<Advantage>
The box sheet 10 has a slit 16 that extends in a meandering manner while intersecting the boundary line between the side panels 1 to 4 and the lid flaps 5 to 8, and the slit 16 is the upper edge of the side panels 1 to 4. Since the connection portion between 1a to 4a and the side edges 5a to 8a of the lid flaps 5 to 8 is used as the base end, the side panels 1 to 4 and the lid separated by the slit 16 in the state of being assembled in the box body 20 are used. The flaps 5 to 8 can be easily and appropriately deformed independently of each other. Therefore, the box sheet 10 can suppress breakage of the boundary portion between the side panels 1 to 4.

[Other embodiments]
The above embodiment does not limit the configuration of the present invention. Therefore, the above-described embodiment can be omitted, replaced or added with components of each part of the above-described embodiment based on the description of the present specification and common general technical knowledge, and all of them are construed to belong to the scope of the present invention. Should be.

In the box sheet, the specific shapes of the lid flap and the bottom flap are not limited to the shapes described in the above embodiments. For example, the box sheet may be configured such that the extension direction length of the lid flap is ½ of the left-right direction length of the width plane panel. Further, the box sheet has only one bottom flap extending from the lower edge of one side panel as long as the box sheet is provided so as to form the bottom of the box body formed by assembling the box sheet. May be.

The specific shape of the slit extends from the connection portion between the upper edge of the side panel and the side edge of the lid flap as long as it meanders while intersecting the boundary line between the side panel and the lid flap. The shape is not limited to the shape described in the above embodiment. For example, the slit may have a fourth portion that is continuously provided from the third portion. Further, the slit may be configured such that the first portion extending from the base end protrudes into the lid flap.

As the connecting portion between the first portion and the second portion and the connecting portion between the second portion and the third portion, a shape other than the arc shape can be adopted. For example, one or both of the connecting portion between the first portion and the second portion and the connecting portion between the second portion and the third portion are provided with a straight portion extending linearly in the left-right direction. May be good.

The arrangement of the slits in the box sheet is not limited to the arrangement described in the above embodiment. The slits can be arranged based on the specific specifications of the box sheet, for example, of a pair of lid flaps adjacent to each other in the left-right direction with an easy-to-fold line in between, only the adjacent side edge of one of the lid flaps. It may be formed from.

The box sheet is provided on the upper edge of the pair of side panels extending from the pair of lid flaps, even if the adjacent side edges of the pair of lid flaps are spaced apart from each other in the left-right direction. Of these, the portion located between the slits may not be provided with the arc-shaped protruding portion.

As described above, the box sheet according to one aspect of the present invention is suitable for suppressing breakage of the boundary portion between the side panels.

1 1st side panel 1a, 2a, 3a, 4a Upper edge 2 2nd side panel 3 3rd side panel 4 4th side panel 5 1st lid flap 5a, 6a, 7a, 8a Side edge 6 2nd lid flap 7th 3 Closure flap 8 4th lid flap 10 Box sheet 11 1st bottom flap 12 2nd bottom flap 13 3rd bottom flap 14 4th bottom flap 15 Easy-to-bend line 16 Slit 16a 1st part 16b 2nd part 16c 3rd part 16d Breakage prevention shape 17a 1st end point 17b 2nd end point 18 Substrate 20 Box body L Length of slit extension direction W Slit meandering width S Void X Sealing tape

Claims (5)

Four side panels that are connected in the left-right direction via easy-to-fold lines and are assembled in a square cylinder,
A box sheet that can be assembled into a box with a lid flap that extends from the upper edge of the side panel.
A box sheet provided with a slit extending meandering while intersecting the boundary line between the side panel and the lid flap, with the connection portion between the upper edge of the side panel and the side edge of the lid flap as the base end. .. The slit is provided in a first portion protruding from the base end into the side panel, a second portion continuously provided from the first portion and protruding into the lid flap beyond the boundary line, and the above. The box sheet according to claim 1, further comprising a third portion that is continuously provided from the second portion and projects into the side panel beyond the boundary line. The box sheet according to claim 2, wherein the connecting portion between the first portion and the second portion and the connecting portion between the second portion and the third portion are arcuate. The box sheet according to claim 1, claim 2 or claim 3, wherein the slits are formed from the adjacent side edges of the pair of lid flaps adjacent to each other in the left-right direction across the easy-to-bend line. Adjacent side edges of the pair of lid flaps are arranged at intervals in the left-right direction, and among the upper edges of the pair of side panels extending with these lid flaps, between the slits. The box sheet according to claim 4, wherein the portion located in is projected in an arc shape as a whole.

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