JP7400612B2 - Sheet materials, lids, and packaging boxes - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applies June 6, 2019, etc., Hitachi Automotive Systems Co., Ltd. Atsugi Factory, etc. (with attached table) (1) 2019 Oji Corrugated Cardboard Group Packaging Exhibition, September 18, 2019 - September 2019 20th (2) Oji Ginza One Stop Gallery, September 21, 2019 - Present (1) October 9, 2019, Hitachi Automotive Systems, Ltd. Atsugi Factory (2) November 26, 2019, December 4, 2019, 9, 11, 13, 18, 20, 25, January 8, 10, 15, 17, 21-23, 27, 31, February 5-7, 13, 17, 19, 25, 28, 2020 , March 3, 9, 11, 13, 19, 23, 25, April 1, 2, 7, 13, 15-17, 21, 23, Hitachi Automotive Systems Business Services, Ltd.

The present invention relates to a sheet material assembled into a tray shape, a lid body formed by assembling this sheet material, and a packaging box provided with this lid body.

BACKGROUND ART Conventionally, as a tray-shaped lid for closing the opening of a packaging container, one constructed by assembling sheet materials is known from the viewpoint of saving space during transportation and storage. As a method for assembling the sheet material to the lid, for example, a method is employed in which the side panels of the sheet material that form the side surfaces of the lid are folded up, partially overlapped, and then connected using staples.

On the other hand, as an assembly method that does not use staples, an insertion piece is connected to one of the two side panels (male wall) to be connected, and a notch is formed in the other (female wall). Therefore, a method has been proposed in which the tip of an insertion piece is inserted into a notch (see, for example, Patent Document 1). According to this method, sheet materials can be assembled into a tray shape without using staples.

Japanese Patent Application Publication No. 2009-132462

In a structure that employs a notch and an insertion piece as described above, it is difficult to appropriately set the relative position and size of the notch formed in the sheet material and the insertion piece inserted into this notch. Desired. For example, when the side panel is folded, if the notch is not sufficiently open for the insertion piece, it will be difficult to insert the insertion piece into the notch. In particular, the larger the size of the sheet material in the thickness direction, the more difficult it becomes to insert the insertion piece into the notch. Therefore, even if the sheet material has a large dimension in the thickness direction, there is a need for a technique that ensures ease of insertion of the insert piece into the notch and improves assemblability.

The present invention was devised in view of the above-mentioned problems, and one of the purposes is to improve the ease of assembling sheet materials that can be assembled into a tray shape. Note that this purpose is not limited to this purpose, and the scope of this case also includes functions and effects derived from each configuration shown in the "Details for Carrying Out the Invention" described later, which cannot be obtained with conventional techniques. It can be positioned for other purposes.

The sheet material of the present invention includes a rectangular center panel, two first side panels connected to both sides of the center panel in a first direction, and both sides of the center panel in a second direction intersecting the first direction. and two second side panels connected to the tray and assembled into a tray shape. This sheet material includes a notch-like notch provided in the first side panel and penetrating through the thickness direction, and an insert extending from the second side panel in the first direction and inserted into the notch. a groove-shaped groove recessed in the thickness direction, forming a boundary between the central panel and the first side panel, and extending from the notch to the outside in the second direction; and the notch. The first ruled line includes an offset line portion extending inward in the second direction from a position shifted from the base line portion in the first direction.

The lid body of the present invention is characterized by being formed by assembling the above-mentioned sheet materials.
The packaging box of the present invention is characterized by comprising a square cylindrical sleeve body surrounding a storage space in which an article is placed, and the above-mentioned lid body attached to both ends of the sleeve body where an opening is formed. There is.

According to the present invention, it is possible to improve the ease of assembling sheet materials assembled into a tray shape.

It is an exploded perspective view of a packaging box concerning an embodiment. FIG. 2 is a developed view (plan view) of a sheet material assembled into the lid of the packaging box shown in FIG. 1; 3 is an enlarged view of part A in FIG. 2. FIG. It is a partial perspective view explaining the assembly procedure of a sheet material, (a) shows the state in the middle of inserting an insertion piece into a notch part, and (b) shows the state where insertion of an insertion piece into a notch part is completed. shows. FIG. 4 is a view of the main part of the lid body [the part shown in FIG. 4(b)] viewed from its open side (the side opposite to the bottom surface part). FIG. 3 is a plan view (a view corresponding to FIG. 2) of main parts of a sheet material according to a modified example.

Hereinafter, a sheet material, a lid body, and a packaging box as embodiments will be described with reference to the drawings. Note that the embodiments shown below are merely examples, and there is no intention to exclude the application of various modifications and techniques that are not explicitly shown in the embodiments below. Each structure of this embodiment can be modified and implemented in various ways without departing from the spirit thereof. Further, they can be selected or combined as necessary.

[1. composition]
[1-1. Packaging box]
As shown in FIG. 1, the packaging box 40 according to the present embodiment includes a square cylindrical sleeve body 30 surrounding a storage space S in which articles are placed, and two lid bodies 20 attached to the sleeve body 30. ing. Here, a packaging box 40 used for packaging relatively heavy items (heavy items such as steering devices and suspension parts of automobiles) is illustrated.
Both the sleeve body 30 and the lid body 20 of this embodiment are formed of corrugated cardboard sheets. However, illustration of the core of the corrugated cardboard sheet and its flute shape is omitted.

The sleeve body 30 is formed of a double-sided corrugated cardboard sheet (three layers) in which three corrugated cardboard sheets are stacked one on top of the other in order to ensure the strength and rigidity required for a packaging material for heavy goods. On the other hand, the lid body 20 is made by stacking two corrugated cardboard sheets (two-layered) in order to ensure the strength and rigidity required for packaging materials for heavy items while not impairing assembly (bendability). ) Made of double-sided corrugated sheet.

The sleeve body 30 has rectangular openings located at both ends 31 in the axial direction (see the dashed line in FIG. 1) of a square cylindrical shape. In this embodiment, a sleeve body 30 is illustrated in which rectangular display portions 32 are provided on the outer surfaces of two wall portions facing each other. The display section 32 displays, for example, information about the articles contained in the packaging box 40. Here, a display section 32 made of paper and attached to a sleeve body 30 is illustrated.

The two lid bodies 20 are attached to both ends 31 of the sleeve body 30 so as to close the two openings of the sleeve body 30. Here, a packaging box 40 is illustrated in which the sleeve body 30 is disposed with the opening positioned vertically (the axial direction is along the vertical direction), and the lid body 20 is provided as an upper lid and a lower lid of the sleeve body 30. do. The two lid bodies 20 are attached to the sleeve body 30 in upside-down orientations.

In the packaging box 40, the sleeve body 30 constitutes four side surfaces extending in the vertical direction. Furthermore, in the packaging box 40, one of the two lids 20 (upper lid) mainly constitutes the top surface, and the other (lower lid) mainly constitutes the bottom surface.
Note that a band (not shown) for fixing the sleeve body 30 and the two lid bodies 20 may be further attached to the packaging box 40.

[1-2. Lid]
The lid body 20 has a rectangular bottom part 21 and four side parts 22 erected from the outer edge of the bottom part 21, and has a tray shape. As described above, the lid body 20 of this embodiment is not used as a container but as a cap that closes the opening of the sleeve body 30.
The lid body 20 is formed by assembling planar sheet materials 10 (see FIG. 2). That is, the lid body 20 can be unfolded into a planar shape.

The bottom portion 21 of this embodiment has a substantially square shape in plan view. The bottom surface portion 21 constitutes the top surface or the bottom surface of the packaging box 40.
On the other hand, all the side parts 22 of this embodiment have substantially the same rectangular shape when viewed from the side of the lid 20, if the recessed part 23 described later is ignored. The four side parts 22 are continuously provided in a square cylindrical shape. The side surface portion 22 is disposed around the outer periphery of the sleeve body 30 in the packaging box 40, and constitutes a part of the side surface together with the sleeve body 30.

In this embodiment, a rectangular notch 23 is formed in the two side surfaces 22 facing each other from the edge opposite to the bottom surface 21 . The recess 23 is provided to avoid interference with the display section 32 when the lid body 20 is attached to the sleeve body 30. Therefore, the specific shape and size of the recess 23 are set according to the shape and size of the display section 32.

[1-3. Sheet material]
As shown in FIG. 2, the sheet material 10 is a plate-shaped member that extends along a plane and is bendable, and is assembled into a tray-shaped lid 20. As shown in FIG. Hereinafter, the direction in which the sheet material 10 extends is subdivided into a vertical direction (first direction) D1 and a horizontal direction (second direction) D2. The vertical direction D1 and the horizontal direction D2 are orthogonal to each other. Further, the direction perpendicular to both the vertical direction D1 and the horizontal direction D2 is defined as the thickness direction. Furthermore, among the surfaces of the sheet material 10 extending along the longitudinal direction D1 and the lateral direction D2, the surface facing inward in the lid 20 (toward the housing space S in the packaging box 40) is also referred to as the "inner surface", and is the opposite side to the inner surface. The surface (the surface facing outside of the lid body 20) is also referred to as the "outer surface."

The sheet material 10 of this embodiment is formed of a plurality of corrugated cardboard sheets laminated in the thickness direction. As mentioned above, here, the sheet material 10 is exemplified as a double-sided corrugated cardboard sheet in which two corrugated cardboard sheets are stacked one on top of the other.
The type of corrugated board sheet applied to the sheet material 10 is not particularly limited, but for example, an A-flute corrugated sheet with a thickness direction dimension (hereinafter simply referred to as "thickness") of about 5 [mm], or a corrugated board sheet with a thickness of about 5 [mm]. A B-flute corrugated cardboard sheet having a diameter of 3 [mm] is applied. The sheet material 10 may be composed of only the A-flute corrugated sheet, or may be composed of both the A-flute corrugated sheet and the B-flute corrugated sheet.

In this embodiment, the sheet material 10, which is a double-sided corrugated cardboard sheet of so-called AA flutes and has a thickness of approximately 10 [mm], is taken as an example. The two-layered flute in the sheet material 10 has its grain direction (the direction through which the hollow portion passes) extending along the longitudinal direction D1. That is, the sheet material 10 of this embodiment is formed of a corrugated cardboard sheet whose grain direction extends along the longitudinal direction D1.

The sheet material 10 includes a rectangular central panel 1, two first side panels 2 connected to both sides of the central panel 1 in the vertical direction D1, and two first side panels 2 connected to both sides of the central panel 1 in the horizontal direction D2. and a second side panel 3. Since the first side panel 2 is provided with a notch 4 to be described later, the first side panel 2 will also be referred to as the "cut panel 2" in the following description. Further, the second side panel 3 is also referred to as a "flat panel 3."

The center panel 1 is a portion of the lid body 20 that becomes the bottom surface portion 21, and has a substantially square shape as described above.
On the other hand, the cutout panel 2 and the flat panel 3 are portions of the lid body 20 that become the side surface portions 22, and if the cutout portion 9 corresponding to the recessed portion 23 is ignored as described above, they have approximately the same rectangular shape. Specifically, if the notch 9 provided in the cut panel 2 is ignored, the cut panel 2 has a rectangular shape long in the horizontal direction D2, and the flat panel 3 has a rectangular shape long in the vertical direction D1. In the lid body 20, two folded cut panels 2 face each other, and two folded flat panels 3 face each other.
The cutout portion 9 is a rectangular portion cut out from the outer edge (outside edge) of each cut panel 2 in the longitudinal direction D1, and serves as a recess 23 in the lid body 20.

The sheet material 10 is provided on the cut panel 2 as a structure for maintaining the cut panel 2 and the flat panel 3 in a rectangular cylindrical shape when assembled to the lid body 20 (hereinafter also referred to as "assembled state"). A cutout 4 is provided, and an insertion piece 5 extends from the flat panel 3 in the vertical direction D1.
Further, the sheet material 10 is provided with a first ruled line 6, a second ruled line 7, and an uneven ruled line 8, each of which is recessed in the thickness direction, in the form of a groove, as a configuration for guiding the bending when assembled into the lid body 20. . These first ruled lines 6, second ruled lines 7, and uneven ruled lines 8 are all formed on the inner surface of the sheet material 10. Therefore, the first ruled line 6, the second ruled line 8, and the uneven ruled line 8 are not visible when the sheet material 10 shown in FIG. 2 is turned over (plan view of the outer surface of the sheet material 10).

The cut portion 4 is in the shape of a cut that penetrates in the thickness direction, and when the cut panel 2 is folded up with respect to the center panel 1, the cut portion 4 extends toward the insertion piece 5 (toward the outside in the lateral direction D2). ) is configured to open. The cut portions 4 of this embodiment are provided on both sides of each cut panel 2 in the lateral direction D2. Therefore, the sheet material 10 is provided with four notches 4.
Moreover, the insertion pieces 5 of this embodiment extend from the flat panel 3 to both sides in the vertical direction D1. The insertion piece 5 is inserted into the cutout 4 with the cutout panel 2 and the flat panel 3 folded up with respect to the center panel 1. Note that the detailed positions and sizes of the notch 4 and the insertion piece 5 are set so that the insertion piece 5 can be inserted into the notch 4.

The first ruled line 6 forms a boundary between the center panel 1 and the cut panel 2, and guides the folding of the cut panel 2 with respect to the center panel 1. Similarly, the second ruled line 7 forms a boundary between the central panel 1 and the flat panel 3, and guides the folding of the flat panel 3 with respect to the central panel 1. The detailed configuration of the first ruled line 6 and the second ruled line 7 will be described later.

As shown in FIG. 3, the cut portion 4 of this embodiment includes a vertical line portion (first line portion) 4a extending outward in the vertical direction D1 from the first ruled line 6, and a vertical line portion 4a extending in the vertical direction D1. It has a horizontal line part (second line part) 4b extending inward in the lateral direction D2 from the outer end part (outer end part). The vertical line portion 4a and the horizontal line portion 4b are provided in a substantially right-angled L-shape. However, the connecting portion between the vertical line portion 4a and the horizontal line portion 4b is formed in a curved shape to alleviate stress concentration.
The notch portion 4 has a triangular through hole 4c formed by cutting out a corner formed by the vertical line portion 4a and the horizontal line portion 4b. The through hole 4c has a function of making it easier to insert the insertion piece 5 into the notch 4. Note that the dimension L1 of the notch 4 in the vertical direction D1 (hereinafter also referred to as "vertical dimension") is set to be at least half the vertical dimension L2 of the notch panel 2 (L1≧0.5×L2).

The insertion piece 5 of this embodiment has a tip end having a dimension L3 in the lateral direction D2 (hereinafter also referred to as "lateral dimension") smaller than the vertical dimension L1 of the notch 4 (L3<L1). 5a, and a base portion 5b whose lateral dimension gradually increases from the tip portion 5a to the flat panel 3. The edge 5c of the insertion piece 5 at the connecting portion between the tip 5a and the base 5b comes into contact with the horizontal line portion 4b of the notch 4 while being inserted into the notch 4. In the insertion piece 5 of this embodiment, the edge 5c that contacts the notch 4 when inserted into the notch 4 extends in an arcuate (curved) shape.

The first ruled line 6 is along the horizontal direction D2 (horizontal direction D2 It does not extend in a straight line (parallel to), but in a shape with a step (unevenness) in the middle. Specifically, the first ruled line 6 includes a base line portion 6a extending outward in the horizontal direction D2 from each notch portion 4, and a position ( An offset line portion 6b extending inward in the lateral direction D2 from a base point P1) to be described later. That is, in the notch portion 4, a base point P1 where the base line portion 6a overlaps and an offset point P2 where the offset line portion 6b overlaps are shifted in the vertical direction D1. In this embodiment, an offset point P2 shifted outward in the vertical direction D1 with respect to the base point P1 is exemplified.

The distance Y1 between the base point P1 and the offset point P2 (the amount of deviation in the longitudinal direction D1 between the base line portion 6a and the offset line portion 6b) is set to be the same as the thickness of the sheet material 10. Therefore, in the present embodiment, the offset point P2 is located approximately 10 mm outside the base point P1 in the vertical direction D1.

The base line portion 6a of this embodiment extends linearly from the inner end (inside end) in the vertical direction D1 of the vertical line portion 4a in the cut portion 4 along the horizontal direction D2.
In contrast, the offset line portion 6b of this embodiment extends diagonally with respect to the horizontal direction D2 between the vertical line portion 4a of the notch portion 4 and the extension line 6e of the base line portion 6a. More specifically, the offset line portion 6b extends from the offset point P2 in the vertical line portion 4a of the notch portion 4 to above the extension line 6e of the base line portion 6a, inward in the horizontal direction D2 and inward in the vertical direction D1. It extends in a straight line towards.

The first ruled line 6 of this embodiment further includes a first main line portion 6c extending along the horizontal direction D2 between the offset line portions 6b on both sides of the horizontal direction D2. The first main line portion 6c extends on the extension line 6e of the base line portion 6a, and connects the offset line portions 6b on both sides in the lateral direction D2. Note that in the first ruled line 6, the first main line portion 6c is a portion having the largest horizontal dimension (than the base line portion 6a and the offset line portion 6b).

As shown in FIG. 2, the first ruled line 6 includes a plurality of first cutting lines 6d provided at intervals of X1 on the first main line portion 6c (in FIG. 2, only one of each first ruled line 6 is labeled). ). The first cutting line 6d is in the shape of a cut passing through the thickness direction, and has a function of facilitating bending of the sheet material 10 at the first main line portion 6c. The first main line portion 6c of this embodiment is configured as a lead ruled line by providing the first cutting line 6d. Note that the interval X1 between adjacent first cutting lines 6d is set to be equal to each other. Further, the lengths L4 of the first cutting lines 6d are set to be equal to each other.

The second ruled line 7 has a second main line portion 7c that extends along the vertical direction D1 (parallel to the vertical direction D1). Here, the second main line portion 7c that extends in a straight line across the entire boundary between the center panel 1 and the flat panel 3 is illustrated.
The second ruled line 7 has a plurality of second cutting lines 7d (in FIG. 2, only one of each second ruled line 7 is labeled) provided on the second main line portion 7c at intervals X2. The second cutting line 7d has a cut shape that penetrates in the thickness direction, and has a function of facilitating bending of the sheet material 10 at the second main line portion 7c. The second main line portion 7c of this embodiment is configured as a lead ruled line by providing the second cutting line 7d. Note that the distances X2 between adjacent second cutting lines 7d are set equal to each other. Further, the lengths L5 of the second cutting lines 7d are set to be equal to each other.

Of the first cutting line 6d and the second cutting line 7d, one extending in a direction intersecting the grain direction of the corrugated cardboard sheet has a length L4 or L5 set longer (larger) than the other, and/or The interval X1 or X2 is set short. In this embodiment, since the grain direction of the corrugated cardboard sheet is along the longitudinal direction D1, the first main line portion 6c and the first cutting line 6d extend in a direction intersecting the grain direction, and the second main line portion 7c and the second A cutting line 7d extends along the grain direction of the corrugated cardboard sheet. Therefore, the length L4 of the first cutting line 6d is set longer than the length L5 of the second cutting line 7d (L4>L5), and/or the interval X1 of the first cutting line 6d is set to be longer than the length L5 of the second cutting line 7d. The distance is set to be shorter than the interval X2 of 7d (X1<X2). Here, an example is given in which the interval X1 between the first cutting lines 6d is shorter than the interval X2 between the second cutting lines 7d, and the lengths L4 and L5 of the first cutting lines 6d and the second cutting lines 7d are set equal to each other. show.

The uneven ruled line 8 forms a boundary between the flat panel 3 and the insertion piece 5, and guides the bending of the insertion piece 5 with respect to the flat panel 3. As shown in FIG. 3, the uneven ruled line 8 is shifted to the same side as the offset line part 6b with respect to the base line part 6a of the first ruled line 6 adjacent to the inner side in the lateral direction D2. That is, when focusing on one of the four insert pieces 5 provided on the sheet material 10, the uneven ruled line 8 that forms the boundary between the insert piece 5 and the flat panel 3 corresponds to the difference between the insert pieces 5. An offset line portion 6b extending inward in the lateral direction D2 from the notch 4 is provided on a side that is offset from a base line portion 6a extending outward in the lateral direction D2 from the notch 4, which is the cutting destination. ing.

In each first ruled line 6 of this embodiment, the offset line portion 6b is shifted outward in the vertical direction D1 with respect to the base line portion 6a, so that the uneven ruled line 8 is shifted outward in the vertical direction D1 with respect to the corresponding base line portion 6a. It is shifted to the outside of. Here, an example of an uneven ruled line 8 extending along the horizontal direction D2 (parallel to the horizontal direction D2) is illustrated.
The distance Y2 between the uneven ruled line 8 and the base line portion 6a in the vertical direction D1 (the amount of deviation in the vertical direction D1 between the uneven ruled line 8 and the baseline portion 6a) is set to be the same as the thickness of the sheet material 10. Therefore, in the present embodiment, the uneven ruled line 8 is positioned outward of the base line portion 6a in the vertical direction D1 by about 10 [mm]. Note that the uneven ruled line 8 and the base line portion 6a are parallel to each other.

[1-4. Assembly procedure]
Hereinafter, the procedure for assembling the sheet material 10 to the lid body 20 will be explained.
First, by folding the sheet material 10 along the first ruled line 6 and the second ruled line 7, the cut panel 2 and the flat panel 3 are folded up with respect to the center panel 1. Further, by folding the sheet material 10 along the uneven ruled lines 8, the insertion piece 5 is arranged from the flat panel 3 toward the cut panel 2 side.

Next, as shown in FIG. 4(a), the insertion piece 5 is inserted into the notch 4. Specifically, after arranging the insertion piece 5 on the outer surface side of the cut panel 2, its tip 5a is moved toward the corner formed by the vertical line part 4a and the horizontal line part 4b of the cut part 4. let Then, the tip 5a of the insertion piece 5 is inserted into the through hole 4c of the notch 4 from the outside.

As shown in FIG. 4(b), the tip portion 5a is disposed between the horizontal line portion 4b of the notch portion 4 and the offset line portion 6b of the first ruled line 6, and the edge portion 5c is located at the horizontal line portion of the notch portion 4. 4b, the insertion of the insertion piece 5 into the notch 4 is completed. When the insertion piece 5 has been inserted into the notch 4 in this way, most of the tip 5a is located on the inner surface of the notch panel 2, and most of the base 5b is located inside the notch. It is arranged on the outer surface side of the panel 2, and the edge portion 5c abuts the horizontal line portion 4b of the notch portion 4.

Further, the insertion piece 5 inserted into the cutout 4 as described above engages with the cutout panel 2 in which the cutout 4 is provided. As a result, as shown in FIGS. 4(b) and 5, the cut panel 2 and the flat panel 3 on which the insertion piece 5 extends are connected to each other at substantially right angles. The cutout panel 2 connected to the flat panel 3 in this way is pressed down from the outer side by the inserter piece 5 by inserting the inserter piece 5 into the notch portion 4 from the outer side as described above. It becomes a form. In addition, in FIG. 5, the cross section of the corrugated paperboard sheet (the end surface along the thickness direction of the sheet material 10) is shown with diagonal lines (hatching).

When the above insertion is completed using all four sets of notches 4 and insertion pieces 5 provided in the sheet material 10, assembly of the sheet material 10 is completed. In the lid body 20, the insertion pieces 5 are maintained in a state inserted into the notches 4, so that the four side surfaces 22 are maintained in a square cylindrical shape. In this way, the lid body 20 can be assembled from the sheet material 10 without using fasteners (for example, staples), adhesives, or the like. In addition, the lid body 20 can be disassembled (developed) into the sheet material 10 again by removing the insertion piece 5 from the notch 4.

[2. Action and effect]
(1) In the sheet material 10, the first ruled line 6 that forms the boundary between the center panel 1 and the cut panel 2 has a base line portion 6a extending outward from the cut portion 4 in the lateral direction D2, and a base line portion at the cut portion 4. 6a and an offset line portion 6b extending inward in the horizontal direction D2 from a position shifted in the vertical direction D1. Therefore, when the cut panel 2 is folded up on the first ruled line 6 with respect to the center panel 1, the cut portion 4 can be opened wide. This allows the insertion piece 5 to be inserted into the notch 4 without forcibly expanding the notch 4 by hand or forcibly bending the insertion piece 5. The insertability of piece 5 can be improved. Therefore, the ease of assembling the sheet material 10 can be improved.

In addition, since the sheet material 10 connects the cut panel 2 and the flat panel 3 by inserting the insertion piece 5 into the cut portion 4 as described above, there is no need to use a connecting tool or adhesive. It can also be assembled into a tray shape. Therefore, assembly costs can be reduced compared to the case where a connector is used. In addition, by eliminating the need for connectors, not only ease of assembly but also ease of dismantling (easiness of unfolding) is improved, so the unfolded state (state of sheet material 10) during transportation, storage, disposal, etc. This makes it easy to keep it as such. This makes it possible to save space.

(2) When the offset line portion 6b extends obliquely to the horizontal direction D2 between the notch portion 4 and the extension line 6e of the base line portion 6a, so the offset line portion 6b is parallel to the horizontal direction D2 Compared to this, it is possible to suppress unevenness in the portion (side surface portion 22 of the lid body 20) corresponding to the offset line portion 6b in the assembled state. In addition, in the lid body 20, a part of the cut panel 2 (a part of the side face part 22) is provided diagonally toward the insertion piece 5 according to the offset line part 6b, so that it cannot be inserted into the cut part 4. The insertion piece 5 can be prevented from coming off.

(3) It is known that in a corrugated cardboard sheet, a line extending in a direction intersecting the grain direction has a stronger repulsive force against bending (is less likely to bend) than a line extending along the grain direction. On the other hand, in the sheet material 10, the first cutting line 6d on the first main line portion 6c extending in the direction crossing the grain direction is the second cutting line on the second main line portion 7c extending along the grain direction. Since the first main line portion 6c is provided at a shorter interval X1 than the second main line portion 7d, the bendability of the first main line portion 6c can be improved with respect to the second main line portion 7c. As a result, bendability is ensured even in the first main line portion 6c extending in the direction intersecting the grain direction, so that not only the flat panel 3 can be folded up with respect to the center panel 1, but also the cut panel 2 can be folded up. It becomes easier. Therefore, the cut panel 2 and the flat panel 3 can be folded up more appropriately, thereby improving the shape stability in the assembled state.

Note that instead of (or in addition to) making the interval X1 between the first cutting lines 6d shorter than the interval X2 between the second cutting lines 7d, the first cutting lines 6d can be made longer than the second cutting lines 7d (L4> L5), the bendability of the first main line portion 6c can be improved with respect to the second main line portion 7c as described above. Therefore, also in this case, folding of the cut panel 2 and the flat panel 3 relative to the center panel 1 becomes easy, and the shape stability in the assembled state can be improved.

(4) In the insertion piece 5, since the edge 5c that contacts the notch 4 when inserted into the notch 4 extends in a curved shape, the insertion piece 5 is inserted into the notch 4. Even if the edge 5c is pressed against the notch 4 during assembly or assembly, stress concentration at the edge 5c can be alleviated. Thereby, damage to the insertion piece 5 can be suppressed. Furthermore, when punching out the sheet material 10, stress concentration at the edge 5c is alleviated, so damage to the sheet material 10 can be suppressed.

(5) Since the offset line portion 6b extends from a position shifted outward in the vertical direction D1 from the base line portion 6a in the cut portion 4, when the cut panel 2 is folded up as described above, the cut The portion 4 can be opened outward from the base line portion 6a (outward in the lid body 20). This makes it easy to insert the insertion piece 5 into the notch 4 from the outside surface side, so that it becomes easy to assemble the cutout panel 2 in a form in which the insertion piece 5 presses down the cutout panel 2 from the outside surface side.

In addition, in the lid body 20 in which the insertion piece 5 is inserted into the notch part 4 from the outside surface side, the main part of the insertion piece 5 disposed inside the side surface part 22 is wider than the base part 5b. The tip portion 5a has a small horizontal dimension L3. On the other hand, in a lid body in which the insertion piece 5 is inserted into the notch 4 from the inner side, the main part of the insertion piece 5 located inside the side surface is closer to the tip 5a. The base portion 5b also has a large horizontal dimension.

Therefore, in the configuration in which the insertion piece 5 is inserted into the notch 4 from the outside side as described above, the insertion piece 5 The portion that protrudes inward of the side surface portion 22 can be made smaller. Thereby, when the lid 20 is attached to both ends 31 of the sleeve body 30, the side surface 22 of the lid 20 and the sleeve body 30 are less likely to interfere with each other, so that the ease of assembling the packaging box 40 can be improved.

(6) The sheet material 10 formed of a corrugated cardboard sheet whose grain direction extends along the vertical direction D1 has a larger repulsive force when bent along a line along the horizontal direction D2 than when bent along a line along the vertical direction D1. . Utilizing this, when the cut panel 2 and the flat panel 3 are folded up against the center panel 1, the cut panel 2 is made easier to separate (repel) from the center panel 1 than the flat panel 3, and then By pressing the cut panel 2 with the insert piece 5 from the outer surface side, the cut panel 2 and the insert piece 5 can be engaged more appropriately. Therefore, the shape stability in the assembled state can be improved.

(7) Since the sheet material 10 is formed from a plurality of corrugated sheets laminated in the thickness direction, the strength and rigidity of the sheet material 10 is lower than when it is formed from a single (single layer) corrugated sheet. be enhanced. This allows it to be used for packaging heavy items.
On the other hand, the sheet material 10 formed from a plurality of corrugated sheets laminated in the thickness direction has lower bending properties due to the increase in thickness, and may have poor bendability due to the increase in thickness, compared to one formed from a single corrugated sheet. 4 becomes difficult to open, which may reduce the ease of inserting the insertion piece 5. On the other hand, if the first ruled line 6 is provided, the notch portion 4 can be opened wide as described above, so that ease of assembly can be ensured while supporting packaging of heavy items.

(8) The cut portion 4 includes a vertical line portion 4a extending outward in the vertical direction D1 from the first ruled line 6, and a horizontal line extending inward in the horizontal direction D2 from the outer end of the vertical line portion 4a in the vertical direction D1. Since it is provided in an L-shape with the portion 4b, it is possible to suppress the inserted insertion piece 5 from coming off, compared to a case where it is provided in a straight line. More specifically, the edge portion torn by the horizontal line portion 4b catches the edge portion 5c of the insertion piece 5, thereby suppressing the displacement of the insertion piece 5. Therefore, the shape stability in the assembled state can be improved.
In addition, since the notch 4 has a triangular through hole 4c formed by cutting out the corner formed by the vertical line part 4a and the horizontal line part 4b, the notch part The opening width of No. 4 can be increased. Thereby, the insertability of the insertion piece 5 can be improved.

(9) Since the uneven ruled line 8 that forms the boundary between the flat panel 3 and the insert piece 5 is shifted to the same side as the offset line part 6b with respect to the base line part 6a, the cut is folded up by the first ruled line 6. An insertion piece 5 bent along an uneven ruled line 8 is positioned on the side of the panel 2 where the notch 4 opens. For example, as in the present embodiment, for a notch 4 that opens outward from the base line portion 6a (outside of the lid body 20), the insertion piece 5 bent at the uneven ruled line 8 is inserted into the notch 4. is located on the outer surface side of the cut panel 2, which is the opening side. Therefore, the insertability of the insertion piece 5 into the notch 4 can be further improved.

(10) Since the displacement amount Y1 in the longitudinal direction D1 between the base line portion 6a and the offset line portion 6b is set to be the same as the thickness of the sheet material 10, the cut in the cut panel 2 folded up as described above The opening of the portion 4 can be made to correspond to the thickness of the sheet material 10 (insertion piece 5). As a result, the size relationship between the opening width of the notch 4 and the thickness of the insertion piece 5 is optimized, so while ensuring the insertability of the insertion piece 5 into the notch 4, the notch It is possible to prevent the insertion piece 5 inserted into the insertion piece 4 from coming off.

(11) Since the displacement amount Y2 in the vertical direction D1 between the uneven ruled line 8 and the base line portion 6a is set to be the same as the thickness of the sheet material 10, the cut portion in the cut panel 2 folded up as described above 4, the position of the insertion piece 5 bent at the uneven ruled line 8 can be optimized. Thereby, the insertability of the insert piece 5 into the notch portion 4 can be further improved, and the gap between the insert piece 5 and the cut panel 2 in the assembled state is reduced, so that shape stability can be improved.

(12) Since the vertical dimension L1 of the notch 4 is set to be more than half of the vertical dimension L2 of the notch panel 2, the insertion piece 5 can be engaged with the cut panel 2. Thereby, shape stability in the assembled state can be ensured.
(13) According to the lid body 20 formed by assembling the sheet materials 10, ease of assembly and disassembly can be improved as described above. Therefore, assembly costs can be reduced, and space can be saved during transportation, storage, disposal, etc.
(14) According to the packaging box 40 including the square cylindrical sleeve body 30 and the lid body 20 attached to both ends 31 where the opening of the sleeve body 30 is located, the ease of assembling the lid body 20 and Since it is easier to dismantle, assembly costs can be reduced, and space can be saved during transportation, storage, and disposal.

[3. Modified example]
FIG. 6 is a plan view showing main parts of a sheet material 10' according to a modified example. As shown in FIG. 6, the sheet material 10' of this modification differs from the sheet material 10 described above in first ruled lines 6' and uneven ruled lines 8'. More specifically, in the sheet material 10', the direction in which the offset line part 6b' and the uneven ruled line 8' are shifted with respect to the base line part 6a' is opposite to that of the above embodiment. In addition, in FIG. 6, the same reference numerals are given to elements that are the same as or correspond to the elements described in the above embodiment.

In this modification, the offset line part 6b' of the first ruled line 6' is shifted in the horizontal direction D2 from a position (offset point P2' to be described later) which is shifted inward from the base line part 6a' in the vertical direction D1 in the notch part 4. extends inward. That is, in the cut portion 4, an offset point P2' where the offset line portion 6b' overlaps is shifted inward in the vertical direction D1 with respect to a base point P1' where the base line portion 6a' overlaps.

The base line portion 6a' extends outward in the lateral direction D2 from the base point P1' in the notch 4. Note that in this modification as well, the base line portion 6a' is linear along the lateral direction D2.
Further, the offset line portion 6b' extends diagonally with respect to the horizontal direction D2 between the vertical line portion 4a of the cut portion 4 and the extension line 6e' of the base line portion 6a'. More specifically, the offset line portion 6b' extends from the inner end (inner end) of the vertical line portion 4a in the vertical direction D1 to the extension line 6e' of the base line portion 6a', and extends from the inner side in the horizontal direction D2. It extends linearly outward in the vertical direction D1.
The first main line portion 6c' extends on the extension line 6e' of the base line portion 6a' and connects the offset line portions 6b' on both sides in the lateral direction D2, as in the above embodiment.

The uneven ruled line 8' is shifted to the same side as the offset line part 6b' with respect to the base line part 6a' of the first ruled line 6' adjacent to the inner side in the lateral direction D2. In each first ruled line 6' of this modification, the offset line part 6b' is shifted inward in the vertical direction D1 with respect to the base line part 6a', so the uneven ruled line 8' is aligned with the corresponding base line part 6a'. On the other hand, it is shifted inward in the vertical direction D1. Here, similarly to the above embodiment, an example of an uneven ruled line 8' extending along the horizontal direction D2 (parallel to the horizontal direction D2) is illustrated.

In assembling the sheet material 10' configured as described above, when inserting the insert piece 5 into the notch 4, place the insert piece 5 on the inner surface side of the cut panel 2, and then 5a is moved toward the corner formed by the vertical line portion 4a and the horizontal line portion 4b of the cut portion 4. Then, the tip 5a of the insertion piece 5 is inserted into the through hole 4c of the notch 4 from the inner side. When the insertion piece 5 is completely inserted into the notch 4, most of the tip 5a is located on the outer surface side of the notch panel 2, and most of the base 5b is located in the notch. It is arranged on the inner surface side of the panel 2. In addition, in the lid body assembled by inserting the insertion piece 5 into the notch 4 from the inner surface side as in this modification, the cut panel 2 presses down the insertion piece 5 from the outer surface side.

According to the sheet material 10' of this modification, when the cut panel 2 is folded up with respect to the center panel 1, the cut portion 4 is placed on the inner side (inner side of the lid body 20) than the base line portion 6a'. It can be opened. This makes it easier to insert the insertion piece 5 into the notch 4 from the inner surface side, so it becomes easier to assemble the insertion piece 5 in a form in which the cut panel 2 presses the insertion piece 5 from the outer surface side.

In the form in which the insertion piece 5 is inserted into the notch 4 from the inner side, the main part of the insertion piece 5 disposed outside the side surface 22 has a tip with a smaller horizontal dimension L3 than the base 5b. This becomes part 5a. On the other hand, in the embodiment in which the insertion piece 5 is inserted into the notch 4 from the outside side, the main portion of the insertion piece 5 disposed on the outside of the side surface is The base portion 5b has a larger horizontal dimension than the tip portion 5a.
Therefore, in the form in which the insertion piece 5 is inserted into the notch 4 from the inner side as in this modification, the appearance of the outside of the side surface of the lid body can be improved compared to that of the above embodiment. . This improves the appearance of the lid and the packaging box to which this lid is applied.

Also in this modification, the uneven ruled line 8' is shifted to the same side as the offset line part 6b' (inner side in the vertical direction D1) with respect to the base line part 6a'. Therefore, the insertion piece 5 bent along the uneven ruled line 8' can be positioned on the side where the notched portion 4 opens in the cut panel 2 folded up along the first ruled line 6'. Therefore, similarly to the above embodiment, the ease of inserting the insertion piece 5 into the notch 4 can be further improved.
In addition, according to the sheet material 10' of this modification, similar operations and effects can be obtained from the same configuration as in the above embodiment.

Note that the first ruled lines 6, 6' are not limited to those described above. For example, the base line portions 6a, 6a' may be inclined with respect to the lateral direction D2, or the offset line portions 6b, 6b' may extend along the lateral direction D2 (parallel to the lateral direction D2). . Further, the first main line portions 6c, 6c' and the first cutting line 6d may be omitted.
The second ruled line 7 is also not limited to the above, and may be inclined with respect to the vertical direction D1, or the second cutting line 7d may be omitted. Further, the second ruled line 7 and the uneven ruled lines 8, 8' may be omitted from the sheet materials 10, 10'.

The above-described notch 4 is an example. The cut portion 4 is not limited to the L-shape described above, but may be provided in a diagonal straight line that intersects both the vertical direction D1 and the horizontal direction D2, for example. Further, the through hole 4c may be omitted. According to the cut portion in which the through hole 4c is omitted, a reduction in strength of the cut panel 2 can be suppressed.
The above-mentioned insertion piece 5 is also an example. The insertion piece 5 may have an angular edge 5c, or may have a shape whose entire width is uniform.
Note that the number of sets of the cut portions 4 and the insertion pieces 5 provided in the sheet materials 10, 10' may be less than four sets.

The sheet materials 10, 10' and the lid 20 may be formed of a single (single layer) corrugated sheet, or may be formed of a sheet-like member other than a corrugated sheet. Similarly, the sleeve body 30 is not limited to the three-layer corrugated cardboard sheet described above. However, from the viewpoint of space saving, the sleeve body 30 is preferably formed of a foldable (bendable) material.
The application of the sheet materials 10, 10' and the lid 20 is not limited to the packaging box 40 described above. The sheet materials 10, 10' and the lid body 20 may be used, for example, instead of the sleeve body 30 described above, as a top lid of a container having a bottom part and a side part.

1 Center panel 2 Cut panel (first side panel)
3 Flat panel (second side panel)
4 Cut portion 4a Vertical line portion (first line)
4b Horizontal line part (second line)
4c Through hole 5 Insert piece 5a Tip 5b Base 5c Edge 6 First ruled line 6a Base line part 6b Offset line part 6c First main line part 6d First cutting line 6e Extension line 7 Second ruled line 7c Second main line part 7d Bisection line 8 Different level ruled line 9 Notch part 10 Sheet material 20 Lid body 21 Bottom part 22 Side part 23 Recessed part 30 Sleeve body 31 End part 32 Display part 40 Packaging box D1 Vertical direction (first direction)
D2 Lateral direction (second direction)
L1 Vertical dimension of notch 4 L2 Vertical dimension of notch panel 2 L3 Horizontal dimension of tip 5a L4 Length of first cutting line 6d L5 Length of second cutting line 7d P1 Base point P2 Offset point S Accommodation space X1 Distance between the first cutting line 6d X2 Distance between the second cutting line 7d Y1 Amount of deviation in the vertical direction D1 between the base line part 6a and the offset line part 6b Y2 Amount of deviation in the vertical direction D1 between the uneven ruled line 8 and the base line part 6a

Claims (11)

a rectangular center panel; two first side panels connected to both sides of the center panel in a first direction; and two first side panels connected to both sides of the center panel in a second direction intersecting the first direction. a second side panel and assembled into a tray shape, the sheet material comprising:
a cut-shaped notch provided in the first side panel and penetrating in the thickness direction;
an insertion piece extending from the second side panel in the first direction and inserted into the notch;
a base line portion that is recessed in the thickness direction, forms a boundary between the central panel and the first side panel, and extends outward in the second direction from the cut portion, and the base line portion in the cut portion; and a first ruled line including an offset line portion extending inward in the second direction from a position shifted in the first direction ,
The offset line portion extends diagonally with respect to the second direction between the cut portion and the extension line of the base line portion.
A sheet material characterized by : formed of a corrugated cardboard sheet whose grain direction extends along the first direction or the second direction,
a second ruled line recessed in the thickness direction and forming a boundary between the center panel and the second side panel;
The first ruled line has a cut-shaped first cutting line that is provided at intervals on the first main line portion extending along the second direction and penetrates in the thickness direction,
The second ruled line has a cut-shaped second cutting line that is provided at intervals on a second main line portion extending along the first direction and penetrates in the thickness direction,
According to claim 1 , one of the first cutting line and the second cutting line extending in a direction intersecting the eye direction is longer and/or the distance is shorter than the other. sheet material. 3. The sheet material according to claim 1 , wherein the insertion piece has an edge that abuts the notch when inserted into the notch and extends in a curved shape. Any one of claims 1 to 3 , wherein the offset line portion extends inward in the second direction from a position shifted outward in the first direction from the base line portion in the cut portion. Sheet materials listed in section. The sheet material according to claim 4 , characterized in that it is formed of a corrugated cardboard sheet whose grain direction extends along the first direction. Any one of claims 1 to 3 , wherein the offset line portion extends inward in the second direction from a position shifted inward in the first direction from the base line portion in the cut portion. Sheet materials listed in section. The sheet material according to any one of claims 1 to 6 , characterized in that it is formed of a plurality of corrugated cardboard sheets laminated in the thickness direction. The cut portion includes a first line portion extending from the first ruled line to the outside in the first direction, and an end portion of the first line portion extending outside in the first direction to the inside in the second direction. and a triangular through hole formed by cutting out a corner formed by the first line part and the second line part. Sheet materials listed in section. It is characterized by comprising an uneven ruled line that is recessed in the thickness direction, forms a boundary between the second side panel and the insertion piece, and is shifted to the same side as the offset line part with respect to the base line part. The sheet material according to any one of claims 1 to 8 . A lid body, characterized in that it is formed by assembling the sheet material according to any one of claims 1 to 9 . a square cylindrical sleeve body surrounding a storage space in which articles are placed;
A packaging box comprising: the lid body according to claim 10 , which is attached to both ends of the sleeve body where the openings are located.

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