JP3226503U - Box sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a box sheet in which an outer lid flap can be easily engaged with an inner lid flap and which can easily maintain the strength of a lid portion of a box body. A box sheet (10) has a first outer lid flap (3a) having a pair of projecting pieces (11b) extending from front edge edges on both sides in the width direction, and a pair of inner lid flaps (4a, 4b) having base ends. First notches 12a, 12b extending along the edges, second notches 13a, 13b parallel to the first notches, and ends located on the side of the second outer flap 3b when assembling the first notches and the second notches. Slits 15a, 15b which are formed by third cuts 14a, 14b for connecting each other and into which projecting pieces are inserted at the time of assembly, and an end portion located on the side of the first outer lid flap at the time of assembling the first cut and the second cut Easy folding lines 16a and 16b for connecting the two are provided, and the third notch is inclined from the base end side of the inner lid flap toward the tip side toward the side where the second outer lid flap is located during assembly. [Selection diagram] Figure 1

Description

The present invention relates to a box sheet.

Boxes assembled from corrugated cardboard sheets and the like are widely used for storing and transporting articles. The corrugated cardboard sheet includes a pair of length-side panels and a pair of width-side panels that are alternately connected in the left-right direction and are assembled into a rectangular tube shape, and a pair of outside lids extending from the upper edges of the pair of length-side panels. A flap and a pair of in-lid flaps extending from the upper edges of the pair of width-side panels are provided, and the pair of length-side panels and the pair of width-side panels are assembled into a rectangular tube shape. It is widely adopted that the lid portion is formed by bending the outer lid flap and then folding the pair of outer lid flaps inward.

As for this corrugated board sheet, a pair of protrusions is provided on both end edges in the width direction of the flap outside the lid so that the lid can be easily closed, and these protrusions are inserted into the slits provided in the flap inside the lid. A structure is proposed (see Japanese Utility Model Laid-Open No. 02-80521).

Japanese Utility Model Laid-Open No. 02-80521

In the above publication, first tongue pieces are provided on both end sides of the tip side of the outer lid flap, folds transverse to the width direction are provided on the outer lid flap, and the first tongue is provided on the pair of inner lid flaps. A structure provided with a slit into which one piece is inserted is described. The above-mentioned publication describes that the lid of the box is formed by bending the folds formed on the flap outside the lid and inserting the pair of first tongue pieces into the slits.

However, according to this configuration, the strength of the lid portion is likely to be small due to the provision of the fold line that crosses the lid portion of the box body.

The present invention has been made in view of such inconveniences, and provides a box sheet in which the outer flap of the lid can be easily engaged with the inner flap of the lid and the strength of the lid of the box is easily maintained. The purpose is to provide.

A box sheet according to an aspect of the present invention, which has been made to solve the above problems, is a pair of length-side panels and a pair of width-side panels that are assembled into a rectangular tube shape that has upper and lower openings facing each other in an assembled state. A first lid outer flap extending from an upper edge of the one length face panel, a second lid outer flap extending from an upper edge of the other length face panel, and a pair of width face panels. A box sheet, comprising a pair of inner lid flaps extending from an upper edge, which can be assembled in a box shape, wherein the first outer lid flap is a pair of protrusions extending from both front edge edges in the width direction. A pair of in-lid flaps having a first cut extending along the base edge, a second cut parallel to the first cut, and the first cut and the second cut when assembling. A slit formed by a third notch that connects the ends located on the side of the second flap outside the lid and into which the projecting piece is inserted at the time of assembly, and the first notch at the time of assembling the first notch and the second notch. And a second easy-to-fold line connecting the ends located on the flap outer flap side, wherein the third notch is formed by the second flap outer flap during assembly from the base end side of the lid inner flap toward the tip side. It is inclined to the side where it is located.

In the box sheet according to the aspect of the present invention, the outer flap can be easily engaged with the inner flap and the strength of the lid of the box can be easily maintained.

FIG. 1 is a schematic plan view showing a box sheet according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of a box body formed by assembling the box sheet of FIG. FIG. 3 is a schematic plan view showing a state in which the pair of projecting pieces provided on the first outer flap of the box sheet of FIG. 1 are being inserted into the slits provided on the pair of inner flaps. FIG. 4 is a sectional view taken along the line IV-IV in the state of FIG. FIG. 5 is a schematic plan view showing a state in which the pair of protrusions provided on the first outer lid flap of the box sheet of FIG. 1 are inserted into the slits provided on the pair of inner lid flaps.

[Description of Embodiments of the Present Invention]
First, embodiments of the present invention will be listed and described.

A box sheet according to an aspect of the present invention includes a pair of length-face panels and a pair of width-face panels that face each other in an assembled state and are assembled in a rectangular tube shape having upper and lower openings, and one of the length-face panels. First lid outer flap extending from an upper edge of the second lid, a second outer lid flap extending from an upper edge of the other length face panel, and a pair of lids extending from upper edges of the pair of width face panels. A box sheet that includes an inner flap and can be assembled in a box shape, wherein the first lid outer flap has a pair of projecting pieces extending from the front end edges on both sides in the width direction, and the pair of lids. The inner flap is located on the side of the second outer flap when the first notch extending along the base edge, the second notch parallel to the first notch, and the first notch and the second notch are assembled. A slit formed by a third cut connecting the ends to each other, into which the projecting piece is inserted at the time of assembly, and an end positioned on the side of the first outer lid flap at the time of assembling the first cut and the second cut. The third notch is inclined from the base end side of the in-lid flap toward the tip side toward the side where the second outer lid flap is located at the time of assembly.

In the box sheet, the pair of flaps in the lid has a first notch extending along the base edge, a second notch parallel to the first notch, and a first notch when assembling the first notch and the second notch. 2 a slit formed by a third notch that connects end portions located on the flap outer flap side, and into which the projecting piece is inserted during assembly; and the first lid when assembling the first notch and the second notch And an easy-to-bend line that connects the ends located on the outer flap side. As a result, a tongue piece defined by the slit and the easy folding line is formed on the pair of lid flaps. In the box sheet, the pair of projecting pieces provided on the first outer lid flap can be inserted into the slit to sandwich the pair of projecting pieces between the main body of the inner lid flap and the tongue piece. .. Further, in the box sheet, the third cut is inclined from the base end side of the flap inside the lid toward the tip side toward the side where the second flap outside the flap is located at the time of assembly. It is easy to insert the protrusion along the edge of the third cut. Therefore, in the box sheet, the first outer lid flap can be easily engaged with the pair of inner lid flaps without providing the first outer lid flap with a fold line transverse to the width direction. Accordingly, the box sheet easily maintains the strength of the lid of the box.

It is preferable that the fold easy line be inclined from the base end side of the in-lid flap toward the tip side toward the side where the second outer lid flap is located during assembly. As described above, the easy-to-bend line is inclined from the base end side of the in-lid flap toward the tip side toward the side where the second outer lid flap is located during assembly, so that the reaction force of the seat is utilized. Then, it is easy to sandwich the pair of protrusions between the main body and the tongue.

The first cut may be longer than the second cut. As described above, since the first cut is longer than the second cut, the pair of protrusions can be easily inserted into the slit, and the pair of protrusions can be inserted into the slit while the pair of protrusions is inserted into the slit. The projecting piece can be easily clamped by the main body and the tongue piece.

The inclination angle of the easy-to-fold line with respect to the base end edge of the in-lid flap may be smaller than the inclination angle of the third cut with respect to the base end edge of the in-lid flap. As described above, the inclination angle of the folding easy line with respect to the base end edge of the flap in the lid is smaller than the inclination angle of the third cut with respect to the base edge of the flap in the lid. It can be easily inserted into the slit, and it is easy to prevent the pair of protrusions from coming off the slit in a state where the pair of protrusions are inserted into the slit.

The edge of the projecting piece is preferably arched. Since the edges of the projecting pieces are arcuate in this manner, the pair of projecting pieces can be easily inserted into the slits.

In the present invention, the terms "upper" and "lower" mean the upper and lower sides of the envisioned general usage of the box body formed by assembling the box sheet. "The edge of the projecting piece is arcuate" means that the tip edge of the projecting piece is a curved shape such as an arc shape, an arc shape, etc., and is linear from both ends of this tip edge to the base end edge of the projecting piece. Including a shape having a portion extending to.

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

[Box for boxes]
The box sheet 10 in FIG. 1 is composed of one sheet. The box sheet 10 includes a pair of length-face panels (first length-face panel 1a and second length-face panel 1b) and a pair of length-face panels that face each other in an assembled state and are assembled into a rectangular tube shape having upper and lower openings. From the width side panels (the first width side panel 2a and the second width side panel 2b), the first outer lid flap 3a extending from the upper edge of the first length side panel 1a, and the upper edge of the second length side panel 1b. A second outer lid flap 3b that extends, a first inner lid flap 4a that extends from the upper edge of the first width surface panel 2a, and a second inner lid flap 4b that extends from the upper edge of the second width surface panel 2b. Equipped with. The second length surface panel 1b, the second width surface panel 2b, the first length surface panel 1a, and the first width surface panel 2a are connected in this order from one side to the other side in the left-right direction. The box sheet 10 includes a first bottom outer flap 5a extending from a lower edge of the first length surface panel 1a and a second bottom outer flap extending from a lower edge of the second length surface panel 1b. 5b, a first inner bottom flap 6a extending from the lower edge of the first width surface panel 2a, a second inner bottom flap 6b extending from the lower edge of the second width surface panel 2b, and a pair of length surface panels. Of these, a glue margin 7 extending from an outer side edge of the second length surface panel 1b located on the outer side in the left-right direction (left side in the left-right direction in the present embodiment) is provided. Note that the “horizontal direction” means the horizontal direction in the assumed general usage mode of the box body formed by assembling the box sheet. Further, in FIG. 1, thick solid lines indicate cutting lines formed by cutting the sheet, and thin solid lines indicate ruled lines formed by pushing one side of the sheet.

The first outside-lid flap 3a has a main body 11a and a pair of projecting pieces 11b extending from the front end edges on both sides of the main body 11a in the width direction. The second flap 3b outside the lid has a main body 18a and a convex portion 18b protruding from the central portion of the tip edge of the main body 18a. The first in-lid flap 4a and the second in-lid flap 4b include first notches 12a and 12b extending along a base edge (a boundary line between the first width surface panel 2a and the second width surface panel 2b), and a first notch. Second cuts 13a, 13b parallel to 12a, 12b, and third cuts 14a for connecting the ends located on the side of the second outer flap 3b when the first cuts 12a, 12b and the second cuts 13a, 13b are assembled. , 14b, and slits 15a, 15b into which the projecting pieces 11b are inserted at the time of assembly. In addition, the first in-lid flap 4a and the second in-lid flap 4b are bent to connect the ends located on the first-lid-outer-flap 3a side when assembling the first notches 12a, 12b and the second notches 13a, 13b. It has easy lines 16a and 16b. The first in-lid flap 4a and the second in-lid flap 4b are provided with tongue pieces 19a, 19b by the first notches 12a, 12b, the second notches 13a, 13b, the third notches 14a, 14b and the easy folding lines 16a, 16b. It is demarcated.

The box sheet 10 can be assembled in a box shape, and is specifically configured to be assembled in the box body 30 shown in FIG. A procedure for assembling the box sheet 10 into the box body 30 will be described. First, the second length surface panel 1b located on the outer side in the left-right direction (left side in the left-right direction in the present embodiment) is folded over the inner surface of the second width surface panel 2b connected to the second length surface panel 1b, and left-right direction. The first width surface panel 2a located on the outer side (right side in the left-right direction in this embodiment) was folded on the inner surface of the first length surface panel 1a connected to the first width surface panel 2a, and the glue margin 7 was folded. It is attached to the inner surface of the first width panel 2a. At this time, the bending piece 17a provided on the first bottom inner flap 6a side of the first bottom outer flap 5a is attached to the first bottom inner flap 6a in a folded state, and the second bottom outer flap 5b is attached to the second bottom outer flap 5b. The pair of bottom outer flaps and the pair of bottom inner flaps are provided with a pair of length face panels and a pair of bottom surface flaps in a state where the bending piece 17b provided on the inner bottom flap 6b side is folded and attached to the second inner bottom flap 6b. Fold it inside the width panel. In this state, the endlessly connected second length face panel 1b, second width face panel 2b, first length face panel 1a and first width face panel 2a are spread out in a rectangular tube shape, and the body portion of the box body 30 is opened. 31 is formed. At this time, the connecting piece of the first bottom outer flap 5a and the first inner bottom flap 6a and the connecting piece of the second outer bottom flap 5b and the second inner bottom flap 6b respectively close the lower opening of the body portion 31. The first bottom outer flap 5a and the second bottom outer flap 5b engage with each other to form a bottom portion 32 of the box body 30.

Next, after accommodating a desired article in the box 30, the first in-lid flap 4a and the second in-lid flap 4b are bent substantially inwardly inside the first width surface panel 2a and the second width surface panel 2. Subsequently, as shown in FIGS. 3 and 4, the main body 11a of the first outer flap 3a is bent to the inside of the first length face panel 1a, and the base end edges of the pair of projecting pieces 11b are bent to form a pair. The projecting piece 11b is inserted into the slits 15a, 15b from the tip side while contacting the tongue pieces 19a, 19b. Further, as shown in FIG. 5, the main body 11a of the first flap 3a outside the lid is bent substantially perpendicularly to the first length face panel 1a, so that the pair of protrusions 11b are completely inserted into the slits 15a and 15b. To do. After that, the second flap 3b outside the lid is bent substantially vertically inward with respect to the second length surface panel 1b, and the convex portion 18b is inserted into the inside of the main body 11a of the flap 3a outside the first lid, whereby the box 30 The lid 33 is formed.

The sheet used for the box sheet 10 is not particularly limited as long as it has a strength that can maintain the shape of the box body 30 formed by assembling the box sheet 10, for example, a corrugated cardboard sheet, a cardboard, or the like. Paper sheets, synthetic resin sheets, laminated sheets of paper sheets and synthetic resin sheets, and the like. Among them, a paper sheet is preferable, and a corrugated cardboard sheet is particularly preferable, from the viewpoints of workability, shock absorption, handleability, recyclability, economy and the like. As the corrugated board for forming the box sheet 10, a corrugated core made of base paper is attached to a liner. For example, the corrugated core is attached to one liner. Single-sided corrugated sheet, double-sided corrugated sheet with liner attached to the top of single-sided corrugated sheet, double-sided corrugated sheet with single-sided corrugated sheet top attached to one side, single-sided double-sided corrugated sheet Examples include a double-sided double-faced corrugated cardboard sheet in which corrugated cardboard tops are further laminated. Among these, the double-faced corrugated board sheet is preferable from the viewpoints of workability, economy, durability and the like. The thickness of the double-faced corrugated board sheet is not particularly limited, and may be, for example, about 0.9 mm or more and 8 mm or less. Above all, the thickness is preferably 1.5 mm (E flute).

(Length panel)
The first length surface panel 1a and the second length surface panel 1b are formed in a rectangular shape and substantially the same shape. The left-right length of the first length surface panel 1a and the second length surface panel 1b is larger than the left-right length of the first width surface panel 2a and the second width surface panel 2b.

The left-right lengths of the first length surface panel 1a and the second length surface panel 1b can be appropriately set based on the size of the articles housed in the box body 30 and the like, for example, 15 cm or more and 40 cm or less. can do. The vertical lengths of the first length surface panel 1a and the second length surface panel 1b can be appropriately set based on the size of the articles accommodated in the box body 30 and the like, for example, 5 cm or more and 30 cm or less. can do.

(Width panel)
The first width surface panel 2a and the second width surface panel 2b are formed in a rectangular shape and substantially the same shape. The vertical lengths of the first width surface panel 2a and the second width surface panel 2b may be the same as the vertical lengths of the first length surface panel 1a and the second length surface panel 1b. The left-right lengths of the first width surface panel 2a and the second width surface panel 2b can be appropriately set based on the size of the article to be housed in the box body 30 and the like, but can be, for example, 10 cm or more and 30 cm or less. ..

(Flap outside the first lid)
The first outer lid flap 3a has a rectangular main body 11a and a pair of projecting pieces 11b extending from the front end edges on both sides in the width direction of the main body 11a. An easy-bending line may be formed at the boundary line between the main body 11a and the pair of projecting pieces 11b. It is preferable that the main body 11a is not formed with an easy-to-bend line that crosses the width direction. The width of the main body 11a is substantially equal to the length of the first length surface panel 1a in the left-right direction. That is, both side edges of the main body 11a extend substantially continuously from both side edges of the first length face panel 1a. The leading edge of the main body 11a is abutted with the leading edge of the main body 18a of the second flap 3b outside the lid in the box body 30. That is, the total length of the extension direction length of the main body 11a of the first outside lid flap 3a and the extension direction length of the main body 18a of the second outside lid flap 3b is equal to the width surface panel (the first width surface panel 2a and the second width surface). It is substantially equal to the length of the panel 2b) in the left-right direction.

The outer side edges of the pair of protrusions 11b are provided continuously from the side edges of the main body 11a. As a result, the box sheet 10 allows the pair of protrusions 11b to form the slits 15a and 15b while aligning the outer side edges of the pair of protrusions 11b with the inner surfaces of the first width face panel 2a and the second width face panel 2b. Easy to insert.

The edge of the protrusion 11b is preferably arched. With this configuration, the pair of protrusions 11b can be easily inserted into the slits 15a and 15b. Further, it is particularly preferable that the projecting piece 11b has an arcuate or arcuate tip edge, and a pair of linear side edges that connect both end portions of the tip edge and the tip edge of the main body 11a. The pair of side edges is preferably parallel to the extending direction of the first lid outer flap 3a. With this configuration, the pair of protrusions 11b can be easily inserted into the slits 15a and 15b, and the insertion state of the pair of protrusions 11b into the slits 15a and 15b can be easily maintained.

(Flap outside the second lid)
The second flap 3b outside the lid has a rectangular main body 18a and a convex portion 18b extending from the central portion of the tip edge of the main body 18a. The width of the main body 18a is substantially equal to the length of the second length surface panel 1b in the left-right direction. The width of the convex portion 18b is equal to or less than the distance between the pair of protruding pieces 11b of the first outer lid flap 3a, and is preferably substantially equal to the distance between the pair of protruding pieces 11b.

(Flap inside lid)
The first in-lid flap 4a and the second in-lid flap 4b have main bodies 21a, 21b and tongue pieces 19a, 19b. The tongue pieces 19a, 19b are defined by the first cuts 12a, 12b, the second cuts 13a, 13b, the third cuts 14a, 14b, and the easy folding lines 16a, 16b in the inner region on the proximal side of the main bodies 21a, 21b. ing. The first cuts 12a and 12b, the second cuts 13a and 13b, the third cuts 14a and 14b, and the easy bending lines 16a and 16b are linear.

As shown in FIGS. 3 and 5, the third notches 14a and 14b are formed by the second lid outer flap 3b when assembling from the base end side to the tip end side of the first lid inner flap 4a and the second lid inner flap 4b. It is inclined to the side where it is located. Accordingly, the box sheet 10 can be easily inserted into the slits 15a and 15b by inserting the pair of projecting pieces 11b even if the easy-to-bend line transverse to the width direction is not formed in the main body 11a of the first outer lid flap 3a. can do.

The lower limit of the inclination angle α of the third notches 14a, 14b with respect to the base end edges of the first in-lid flap 4a and the second in-lid flap 4b is preferably 45°, more preferably 60°. If the inclination angle α is less than the lower limit, the pair of protrusions 11b may easily come out of the slits 15a, 15b in the assembled state in which the pair of protrusions 11b are inserted into the slits 15a, 15b. On the other hand, the upper limit of the inclination angle α can be set to 80°, for example. If the inclination angle α exceeds the upper limit, it may be difficult to insert the protruding piece 11b into the slits 15a and 15b.

The easy-to-fold lines 16a and 16b are inclined from the base end side of the first in-lid flap 4a and the second in-lid flap 4b toward the tip side toward the side where the second outer lid flap 4b is located during assembly. As a result, the third cuts 14a, 14b and the easy bending lines 16a, 16b are inclined in the same direction, and the distance between the third cuts 14a, 14b and the easy bending lines 16a, 16b is appropriately spread over both ends. It is kept uniform. As a result, the box sheet 10 easily inserts the pair of protrusions 11b into the slits 15a and 15b while pushing the tongues 19a and 19b inward by the pair of protrusions 11b. Further, it is easy to use the reaction force of the sheet to sandwich the pair of projecting pieces 11b between the main bodies 21a and 21b of the first in-lid flap 4a and the second in-lid flap 4b and the tongue pieces 19a and 19b.

The first cuts 12a and 12b are preferably longer than the second cuts 13a and 13b. As shown in FIG. 3, in the pair of projecting pieces 11b, after the front end portions on the outer side in the width direction are inserted into the slits 15a and 15b, the protrusions 11b and the main bodies 21a and 21b of the first in-lid flap 4a and the second in-lid flap 4b are formed. It is inserted into the slits 15a, 15b while being sandwiched between the tongue pieces 19a, 19b. In the box sheet 10, since the first notches 12a and 12b are longer than the second notches 13a and 13b, the protruding lengths of the tongue pieces 19a and 19b at the portions corresponding to the widthwise outer sides of the pair of protrusions 11b are set. It can be made relatively large, and the insertion of the pair of protrusions 11b into the slits 15a and 15b can be facilitated. Further, in the box sheet 10, the projection lengths of the tongue pieces 19a and 19b in the portions corresponding to the widthwise inner sides of the pair of projecting pieces 11b are made comparatively small, so that the pair of projecting pieces 11b are formed into the slits 15a. It is easy to pinch the main body 21a, 21b and the tongue pieces 19a, 19b in the state of being inserted in 15b.

The inclination angles β of the easy-to-fold lines 16a and 16b with respect to the base edges of the first in-lid flap 4a and the second in-lid flap 4b are the third with respect to the base edges of the first in-lid flap 4a and the second in-lid flap 4b. It is preferably smaller than the inclination angle α of the notches 14a and 14b. According to this structure, the protrusion length of the tongue pieces 19a and 19b in the part corresponding to the width direction outer side of the pair of protrusion pieces 11b is made relatively large, and the insertion of the pair of protrusion pieces 11b into the slits 15a and 15b is facilitated. Can be planned. Further, by making the projection length of the tongue pieces 19a, 19b in the portion corresponding to the widthwise inner side of the pair of projection pieces 11b relatively small, the main body in the state where the pair of projection pieces 11b are inserted into the slits 15a, 15b. 21a and 21b and the tongue pieces 19a and 19b can sandwich it, and it is easy to suppress the pair of protrusions 11b from coming off the slits 15a and 15b.

<Advantages>
In the box sheet 10, the pair of projecting pieces 11b are inserted into the slits 15a and 15b so as to insert the pair of projecting pieces 11b into the first inner flap 4a and the second inner flap. It can be sandwiched between the main body 21a, 21b of 4b and the tongue pieces 19a, 19b. In addition, in the box sheet 10, the third notches 14a and 14b are arranged such that the second outside flap 3b is located at the time of assembling from the base end side of the first inside flap 4a and the second inside flap 4b toward the front end side. Since it is inclined to the side where it does, it is easy to insert the pair of protrusions 11b along the edges of the third notches 14a and 14b. Therefore, in the box sheet 10, the first outer lid flap 3a can be easily formed into the first inner lid flap 4a and the second inner lid flap 4b without providing the first outer lid flap 3a with a fold line crossing the width direction. Can be engaged with. As a result, the box sheet 10 can easily maintain the strength of the lid portion 33 of the box body 30.

[Other Embodiments]
The above embodiment does not limit the configuration of the present invention. Therefore, in the above-described embodiment, it is possible to omit, replace, or add the components of each part of the above-described embodiment based on the description and technical common sense of the present specification, and all of them are construed as belonging to the scope of the present invention. Should be.

For example, the specific configuration for forming the bottom of the box is not particularly limited. The box sheet may form a bottom by abutting the leading edges of a pair of bottom outer flaps extending from the lower edges of a pair of length face panels, such as a so-called American lock type. It may form the bottom.

The above-mentioned easy-to-bend line connected to the ends of the first cut and the second cut is inclined from the base end side of the inner flap of the lid toward the tip side toward the side where the second outer flap of the lid is located during assembly. It is also possible not to have a configuration.

The length of the first cut with respect to the second cut is not particularly limited.

The inclination angle of the easy-to-fold line with respect to the base end edge of the in-lid flap may be equal to or more than the inclination angle of the second cut with respect to the base end edge of the in-lid flap.

The specific shape of the protrusion is not particularly limited. For example, the edge of the protrusion is not limited to the arch shape.

As described above, the box sheet according to one aspect of the present invention is suitable for storing and transporting articles.

1a 1st length side panel 1b 2nd length side panel 2a 1st width side panel 2b 2nd width side panel 3a 1st outside lid flap 3b 2nd outside lid flap 4a 1st inside lid flap 4b 2nd inside lid flap 5a 1 bottom outer flap 5b 2nd bottom outer flap 6a 1st bottom inner flap 6b 2nd bottom inner flap 7 glue margin 10 sheet 11a body 11b protrusions 12a, 12b first notches 13a, 13b second notches 14a, 14b 3 Cuts 15a, 15b Slits 16a, 16b Easy-to-bend lines 17a, 17b Bending pieces 18a Main body 18b Convex parts 19a, 19b Tongue pieces 21a, 21b Main body 30 Box body 31 Body part 32 Bottom part 33 Lid part α Base end edge of flap Angle of the third incision with respect to the angle β Angle of inclination of the easy fold line with respect to the base edge of the flap in the lid

Claims (5)

A pair of length-side panels and a pair of width-side panels that are assembled in a rectangular tube shape having openings at the top and bottom, which face each other in the assembled state;
A first outer lid flap extending from the upper edge of one of the length face panels;
A second outer lid flap extending from the upper edge of the other length face panel;
A box sheet that comprises a pair of flaps in the lid extending from the upper edges of the pair of width-side panels and can be assembled in a box shape,
The first outer lid flap has a pair of protrusions extending from the front edges on both sides in the width direction,
The pair of flaps in the lid,
A first notch extending along the base edge, a second notch parallel to the first notch, and end portions located on the second outer flap flap side during assembly of the first notch and the second notch. A slit formed by a third notch for connection, into which the projecting piece is inserted during assembly,
An easy-folding line connecting the ends located on the first flap outside flap side when assembling the first cut and the second cut,
The box sheet in which the third notch is inclined from the base end side of the inner lid flap toward the front end side toward the side where the second outer lid flap is located during assembly. 2. The box sheet according to claim 1, wherein the easy-to-fold line is inclined from the base end side of the in-lid flap toward the tip side toward the side where the second outer flap is located during assembly. The box sheet according to claim 1 or 2, wherein the first notch is longer than the second notch. The inclination angle of the folding easy line with respect to the base edge of the flap in the lid is smaller than the inclination angle of the third cut with respect to the base edge of the flap in the lid. Sheet for boxes. The box sheet according to any one of claims 1 to 4, wherein an edge of the projecting piece has an arch shape.

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