JP6748316B1 - Box sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet for a box, which can easily attract attention while making the capacity large and which is excellent in handleability. A box sheet according to the present invention includes a bottom panel, a pair of second side panels extending from a pair of opposite side edges of the bottom panel and bent upward, and a tip edge of the second side panel. The second folding panel includes a pair of connecting panels that extend and are bent in parallel with the bottom panel, and a pair of second folding panels that extend from the leading edge of the connecting panel and are folded back toward the inner surface of the second side panel. , A rectangular central portion that is connected to the connection panel and that is arranged in parallel with the second side panel, and a pair of side portions that are disposed on both the left and right outer sides of the central portion, and the side portions are opposite to each other. The outer side edge is brought into contact with the inner surface of the first folded panel that is erected on the other pair of side edges of the bottom panel by the force, so that the side edge is held inclined with respect to the central portion. [Selection diagram] Figure 1

Description

The present invention relates to a box sheet.

Boxes assembled from corrugated cardboard sheets are used as cases for storing and transporting products such as vegetables. As this box, a tray-shaped one is widely used so that the product can be displayed and sold as it is after being transported. As this box, an octagonal box has been proposed from the viewpoint of being easily noticeable (see JP-A-2017-197280).

JP, 2017-197280, A

The box body described in the above publication is assembled such that the side walls are erected from the respective side edges of the octagonal bottom wall. The box body has a visual effect enhanced by forming the product storage space in an octagonal shape in plan view.

However, since the entire box body is formed in an octagonal shape in a plan view (that is, the four corners of the bottom wall are chamfered), the box body itself is small and tends to appear. As a result, according to this box body, it is easy to give the impression that the content of the product is small, and it is difficult to sufficiently enhance the viewer's willingness to purchase. In addition, since the box body is chamfered at the four corners of the bottom wall, it may be inferior in handleability.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a box sheet which can be easily noticed while making the capacity large and which is easy to handle.

A box sheet according to the present invention made to solve the above problems is a box sheet that is formed from one sheet material and can be assembled into a tray-shaped box body, and has a substantially rectangular bottom panel. A pair of first side panels extending from a pair of opposite side edges of the bottom panel and bent upward, and extending from a tip edge of the first side panel, and folded back to the inner surface side of the first side panel. A pair of first folded panels, a pair of second side panels extending from the other pair of side edges of the bottom panel that face each other, and a pair of second side panels bent upward, and a pair of second side panels extending from the leading edges of the bottom panel; A pair of connection panels that are bent in parallel with each other, and a pair of second folding panels that extend from the leading edge of the connection panel and are folded back toward the inner surface of the second side panel, wherein the second folding panel is The sheet has a rectangular central portion that is connected to the connection panel and that is arranged in parallel with the second side panel, and a pair of side portions that are disposed on both left and right outer sides of the central portion. The outer side edge is brought into contact with the inner surface of the first folded panel by the reaction force of, and is held inclined with respect to the central portion.

INDUSTRIAL APPLICABILITY The box sheet according to the present invention can easily attract the attention while showing a large capacity, and is excellent in handleability.

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 showing a box body formed by assembling the box sheet of FIG. FIG. 3 is a schematic plan view of the box body of FIG. 4 is a cross-sectional view of the box body of FIG. 3 taken along the line IV-IV. FIG. 5 is a sectional view taken along the line VV of the box body of FIG. FIG. 6 is a cross-sectional view taken along line VI-VI of the box body of FIG.

[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 is a box sheet that is formed from a single sheet material and can be assembled into a tray-shaped box body, and has a substantially rectangular bottom panel and the bottom panel facing each other. A pair of first side panels that extend from the pair of side edges and are bent upward, and a pair of first folded panels that extend from the tip edges of the first side panel and are folded back toward the inner surface of the first side panel. And a pair of second side panels extending from the other pair of opposite side edges of the bottom panel and bent upward, and a pair extending from the tip edge of the second side panel and bent in parallel with the bottom panel. And a pair of second folding panels extending from the tip edge of the connecting panel and folded back to the inner surface side of the second side panel, wherein the second folding panel is connected to the connection panel. It has a rectangular central portion arranged in parallel with the second side panel, and a pair of side portions arranged on both left and right outer sides of the central portion. By contacting the side edge with the inner surface of the first folded panel, the side edge is held while being inclined with respect to the central portion.

The box sheet extends from a pair of opposite side edges of a substantially rectangular bottom panel, and a pair of first side panels bent upward, and extends from a pair of opposite side edges of the bottom panel, It is provided with a pair of second side panels that are bent upward, and the outer edge of the entire box body in plan view is substantially rectangular. In the box sheet, the second folded panel folded back to the inner surface side of the second side panel has a rectangular central portion arranged in parallel with the second side panel, and on both left and right outer sides of the central portion. A pair of side parts to be arranged, and the side parts are inclined with respect to the central part by bringing the outer side edges into contact with the inner surface of the first folding panel by the reaction force of the sheet. Since it is held by being held, the side portion can be arranged in a state of being inclined with respect to the first side panel and the second side panel in a plan view. The box sheet enhances the handleability by making the entire outer edge in a plan view substantially square, and makes the volume look large, while it makes it easier to attract attention by making the planar shape of the inner space different from the shape of the outer edge. can do. Further, since the box sheet can be held in a state in which the side portions are inclined with respect to the central portion due to interference with the first folded panel due to the reaction force of the sheet, a desired internal space can be easily and reliably formed. can do.

An inner space having an octagonal shape in plan view may be defined by the central portion, the side portion, and the first folded panel. In this way, the inner space having an octagonal shape in plan view is defined by the central portion, the side portion, and the first folded panel, so that the clearance between the outer edge of the entire box body and the outer edge of the inner space in plan view is defined. Can be made large, and it is easy to show a large amount of the internal volume of the articles contained in the box.

It is preferable that another panel is not connected to the outer side edge of the side portion. As described above, since the other panel is not connected to the outer side edge of the side portion, the number of panels is reduced to facilitate the assembly of the box body, and the manufacturing cost of the box sheet is reduced. can do.

The box sheet, each pair of outer folding pieces extending from the side edges on both sides in the width direction of the pair of first side panels, and extending from the side edges on both sides in the width direction of the pair of first folded panels, It further comprises a pair of inner folding pieces that are stacked on the inner surface of the outer folding piece, and an extending piece that extends from the tip edge of the central portion and that is folded on the bottom panel so as to face the connection panel. And the central portion is folded back to the inner surface side of the second side panel with the outer folding piece and the inner folding piece sandwiched between the second side panel and the extension piece. A space may be formed between the central portion and the inner folding piece in the state of being folded and folded. As described above, the box sheet includes the pair of outer folding pieces extending from the side edges on both sides in the width direction of the pair of first side panels, and the side edges on both sides in the width direction of the pair of first folding panels. A pair of inner folding pieces that extend from the outer folding piece and are stacked on the inner surface of the outer folding piece, and extending pieces that extend from the tip edge of the central portion and that are folded and folded on the bottom panel so as to face the connection panel. Further, the central portion is folded back to the inner surface side of the second side panel with the outer folding piece and the inner folding piece sandwiched between the second side panel and the extending piece. In the state of being folded on the bottom panel, a space is formed between the central portion and the inner folding piece, so that the clearance between the outer edge of the entire box body and the outer edge of the inner space in plan view is increased. Then, it is easy to show a large amount of the contents stored in the box. Further, it is easy to enhance the cushioning property for the articles accommodated in the box body by utilizing this space.

It is preferable that the inner folding piece and the outer folding piece have a notch that allows the extension piece to pass therethrough, and a leading edge of the extension piece contacts the inner surface of the second side panel. In this way, the inner folding piece and the outer folding piece have cutouts that allow the extension piece to pass therethrough, and the leading edge of the extension piece abuts the inner surface of the second side panel, whereby The extension piece can be stably held on the bottom panel, and thus the central portion can be stably arranged in parallel with the second side panel.

It is preferable that the connection panel has a cover portion that covers a gap between the side portion and the second side panel. As described above, the connection panel has the covering portion that covers the gap between the side portion and the second side panel, so that the appearance of the entire box body can be enhanced and the internal space of the box body can be improved. It is easy to suppress the manifestation of the change in capacity.

Perforations may be formed at the boundary between the central portion and the pair of side portions. Since the perforations are formed on the boundary line between the central portion and the pair of side portions in this manner, the side portions can be easily bent in a desired direction.

In the present invention, "upper" means "upper" in a general usage mode assumed in a box body formed by assembling a box sheet, and "left and right" means the above-mentioned use of this box body. It means “left and right” in the embodiment. The “inside” means “inside” in the box body, and the “outside” means “outside” in the box body.

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

[Box for boxes]
The box sheet 1 of FIG. 1 is formed from one sheet material. The box sheet 1 can be assembled into a tray-shaped box body, specifically, the box body 20 shown in FIGS. 2 and 3. The box sheet 1 includes a substantially rectangular bottom panel 2, a pair of first side panels 3 extending from a pair of opposite side edges 2 a of the bottom panel 2 and bent upward, and a first side panel 3. A pair of first folded panels 4 extending from the front edge and folded back to the inner surface side of the first side panel, and a pair of second side surfaces extending from the opposite pair of side edges 2b of the bottom panel 2 and bent upward. The panel 5 and a pair of connection panels 6 that extend from the tip edges of the second side panel 5 and are bent in parallel with the bottom panel 2, and extend from the tip edges of the connection panels 6 to the inner surface side of the second side panel 5. And a pair of second folded panels 7 that are folded back. Note that the “substantially rectangular shape” is not limited to a perfect rectangular shape, but includes a shape having notches or irregularities partially.

The first folded-back panel 4 extends from the tip edge of the first side panel 3 and extends from the tip edge of the connection section 11 and the connection section 11 that is bent in parallel with the bottom panel 2, and the inner surface side of the first side panel 3 And a turn-back portion 12 that is turned back. The connecting portion 11 has a pair of locking holes 11a on both sides in the width direction. The second folded panel 7 is connected to the connection panel 6 and has a rectangular central portion 13 arranged in parallel with the second side panel 5, and a pair of side portions 14 arranged on both left and right outer sides of the central portion 13. Have.

The box sheet 1 includes the pair of outer side folding pieces 8 extending from the side edges on both sides in the width direction of the pair of first side surface panels 3 and the side edges on both sides in the width direction of the pair of first folding panels 4. A pair of inner folding pieces 9 extending from the bottom surface panel 2 and extending from the tip edge of the central portion 13 and being folded on the bottom panel 2 so as to face the connection panel 6. And 10. Further, the box sheet 1 includes a pair of insertion pieces 15 that extend from the side edges on both sides in the width direction of the pair of connection panels 6 and are inserted into the locking holes 11a. In addition, in FIG. 1, a thick solid line indicates a cutting line formed by cutting a sheet, and a thin solid line indicates a ruled line formed by pressing one side of the sheet.

The sheet material used for the box sheet 1 is not particularly limited as long as the reaction force of the sheet is sufficiently obtained and the strength of the box body 20 formed by assembling the box sheet 1 is maintained. However, examples thereof include corrugated cardboard sheets, paper sheets such as cardboard, synthetic resin sheets, and laminated sheets of paper sheets and synthetic resin sheets. 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. The corrugated cardboard sheet that forms the box sheet 1 is a corrugated core made of base paper and attached to a liner. For example, the corrugated core is attached to one liner. Single-sided corrugated sheet, double-sided corrugated sheet in which a liner is attached to the top of the single-sided corrugated sheet, double-sided corrugated sheet in which the top of a single-sided corrugated sheet is attached to one side of the double-sided corrugated sheet, double-sided corrugated sheet on one side A double-sided double-faced corrugated sheet obtained by further adhering the tops of the single-sided corrugated sheet may be mentioned. Among these, the double-faced corrugated cardboard sheet is preferable from the viewpoints of workability, economy, durability and the like. The thickness of the corrugated board sheet is not particularly limited, but may be, for example, 1.5 mm or more and 8 mm or less, preferably 3 mm or more and 5 mm or less, and more preferably 3 mm (B flute). The ridgeline direction of the center of the corrugated board sheet may be parallel to the extending direction of the first side panel 3, for example.

Before describing the box sheet 1 in detail, a procedure for assembling the box sheet 1 into the box body 20 will be described first.

In assembling the box sheet 1 into the box body 20, first, the pair of first side surface panels 3 is vertically lifted upward from the bottom surface panel 2. Then, the pair of first folding panels 4 are arranged on the inner surfaces of the pair of first side panels 3 so that the connecting portions 11 are arranged parallel to the bottom panel 2 and the folding portions 12 are arranged parallel to the first side panel 3. Turn back to the side.

Next, the pair of outer folding pieces 8 extending from both side edges of the pair of first side panels 3 in the width direction and the pair of outer folding pieces 8 extending from both side edges of the pair of first folding panels 4 in the width direction. The inner folding piece 9 is bent inward substantially vertically. Then, the pair of second side panels 5 is vertically risen upward from the bottom panel 2, the pair of connection panels 6 is bent in parallel with the bottom panel 2, and the insertion piece 15 extending from the pair of connection panels 6 is inserted. Each of them is inserted into a locking hole 11a formed in the connecting portion 11.

Then, the pair of central portions 13 is folded back to the inner surface side of the pair of second side panel 5 so that the outer folding piece 8 and the inner folding piece 9 are sandwiched between the second side panel 5 and the outer folding piece 8. Then, as shown in FIG. 4, the side edges 14a on the outer side (free end side) of the pair of side portions 14 arranged on the left and right of the central portion 13 are moved by the reaction force of the sheet to the inner surfaces of the pair of first folded panels 4. More specifically, the inner surfaces of the pair of folded portions 12 are brought into contact with each other. As shown in FIG. 5, the side portion 14 is held inclined with respect to the central portion 13 by bringing the outer side edge 14 a into contact with the inner surface of the folded portion 12 by the reaction force of the sheet. In addition, as shown in FIGS. 5 and 6, when the central portion 13 is folded back toward the inner surface of the second side surface panel 5, the extension piece 10 extending from the tip edge of the central portion 13 is arranged in the vertical direction with the connection panel 6. Fold it on the upper surface of the bottom panel 2 so as to face with. The tip edge of the extending piece 10 contacts the inner surface of the second side panel 5. The central portion 13 is arranged in parallel with the second side surface panel 5 in a state where the leading edge of the extending piece 10 is in contact with the inner surface of the second side surface panel 5. As a result, the box sheet 1 is assembled into the box body 20 shown in FIGS. 2 and 3.

(Bottom panel)
The bottom panel 2 has a substantially square shape, and preferably has a substantially square shape. The length of one side of the bottom panel 2 can be, for example, approximately 10 cm or more and 40 cm or less. The four corners of the bottom panel 2 are provided with L-shaped notches 2c along the corners.

(First side panel)
The first side surface panel 3 has a substantially rectangular shape whose width is large with respect to the length in the extending direction. The width of the first side panel 3 is substantially equal to the length of the side edge 2a of the bottom panel 2 from which the first side panel 3 extends. Rectangular cutouts 3a continuous with the cutouts 2c of the bottom panel 2 are formed at both widthwise ends of the base end edge of the first side panel 3. Further, projections 3b projecting toward the front end side in the extending direction are formed at both widthwise ends of the front end edge of the first side panel 3. The protrusion 3b is provided at a position facing the cutout 3a in the extending direction. An opening 3c for ventilation may be formed in the first side panel 3.

(First folded panel)
[Connection part]
The connecting portion 11 has a substantially rectangular shape whose width is larger than the length in the extending direction. The length of the connecting portion 11 in the extending direction is about twice the sheet thickness, and can be, for example, 5 mm or more and 10 mm or less. The connection part 11 has a pair of locking holes 11a at positions equidistant from the center in the width direction toward both sides. The locking hole 11a is provided so as to divide the connecting portion 11 in the width direction. The base end edge of the locking hole 11a may protrude beyond the boundary line with the first side face panel 3 toward the first side face panel 3 side. Further, the connecting portion 11 may have a slit 11b extending in the width direction and having one end connected to the locking hole 11a. Since the connecting portion 11 has the slit 11b, the insertion piece 15 can be easily inserted into the locking hole 11a when the box body 20 is assembled.

[Folded part]
The folding|returning part 12 is a substantially rectangular shape whose width is large with respect to the extension direction length. The extension direction length of the folding|returning part 12 is substantially equal to the extension direction length of the 1st side panel 3. The pair of left and right side edges of the folded portion 12 are located inside the side edges of the first side surface panel 3 by the sheet thickness. When the first side surface panel 3 has the opening 3c, the folded-back portion 12 is formed with the opening 12a that is in communication with the opening 3c in a state of being folded back toward the inner surface side of the first side surface panel 3.

(Outer folding piece)
The outer folding piece 8 has a substantially rectangular shape. In the assembled state of the box body 20, the leading edge of the outer folding piece 8 is abutted with the leading edge of the other outer folding piece 8. The length of the outer folding piece 8 in the extending direction is about ½ of the length of the side edge 2b of the bottom panel 2 on which the second side panel 5 extends. The outer folding piece 8 has a notch 8a on the side edge on the side facing the bottom panel 2 when assembled in the box body 20. The notch 8 a extends along the side edge of the outer folding piece 8 to the tip edge of the outer folding piece 8. As shown in FIG. 5, in the box body 20, the extension piece 10 passes through the notch 8a. The notch 8a can be formed into a substantially rectangular shape whose longitudinal direction is the extending direction of the outer folding piece 8. The depth of the notch 8a based on the width direction of the outer folded piece 8 can be set to about the sheet thickness. Specifically, the depth of the notch 8a based on the width direction of the outer folded piece 8 can be not less than the sheet thickness and not more than twice the sheet thickness, and is not less than the sheet thickness and not more than 1 sheet thickness. It is preferably 5 times or less. The length of the notch 8a in the longitudinal direction can be set to 1/2 or more of the width of the extension piece 10.

The outer foldable piece 8 has a protrusion 8b continuous with the protrusion 3b formed on the first side panel 3 at the base end portion of the side edge located on the upper side when assembled in the box body 20. As shown in FIGS. 2 and 3, in the box body 20, the protrusion 3b formed on the first side panel 3 and the protrusion 8b formed on the outer folding piece 8 are provided in an L shape in a plan view. The protrusions 3b and 8b form an engaging portion 21 that engages with a box body that is stacked above when stacked with another box body.

(Inner folded piece)
The inner folded pieces 9 extend from the side edges of the folded-back portion 12 on both sides in the width direction. The inner folding piece 9 has a substantially rectangular shape. As shown in FIG. 6, the tip edge of the inner folding piece 9 is abutted against the tip edge of the other inner folding piece 9 in the assembled state of the box body 20. The length of the inner folding piece 9 in the extending direction is about ½ of the length of the side edge 2b of the bottom panel 2 on the side where the second side panel 5 extends. The inner folding piece 9 has a notch 9a at the side edge on the side facing the bottom panel 2 when assembled in the box body 20. The notch 9 a extends along the side edge of the inner folding piece 9 to the tip edge of the inner folding piece 9. As shown in FIG. 5, in the box body 20, the extension piece 10 passes through the notch 9a. When assembled in the box body 20, the cutout 9 a overlaps with the cutout 8 a formed in the outer folding piece 8. The shape of the notch 9a formed in the inner folding piece 9 can be the same as the shape of the notch 8a formed in the outer folding piece 8.

(Second side panel)
The second side surface panel 5 has a substantially rectangular shape whose width is large with respect to the length in the extending direction. The width of the second side panel 5 is substantially equal to the length of the side edge 2b of the bottom panel 2 from which the second side panel 5 extends. The extension length of the second side panel 5 is substantially equal to the extension length of the first side panel 3. Rectangular cutouts 5a that are continuous with the cutouts 2c of the bottom panel 2 are formed at both widthwise ends of the base end edge of the second side panel 5. As shown in FIG. 2, the cutouts 5a formed in the second side panel 5 are not only the cutouts 2c formed in the bottom panel 2 and the cutouts 3a formed in the first side panel 3 but also other box bodies. And the recessed portion 22 that engages with the engaging portion 21 of the box body disposed below when configured to be stacked.

(Connection panel)
The width of the connection panel 6 is substantially equal to the width of the second side panel 5. As shown in FIGS. 2 and 3, the connection panel 6 includes a rectangular base 6a having the same width as the central portion 13 that connects the second side panel 5 and the central portion 13, and both side portions of the base portion 6a in the width direction. It has a pair of covering parts 6b which are provided and whose length in the extending direction gradually increases toward the outside in the width direction.

The extending direction length L of the base portion 6a is set to be at least twice the sheet thickness so that the outer folding piece 8 and the inner folding piece 9 can be sandwiched between the central portion 13 and the second side panel 5. The lower limit of the extension length L of the base portion 6a is preferably 3 times the sheet thickness, and more preferably 5 times the sheet thickness. On the other hand, the upper limit of the extension direction length L of the base portion 6a is preferably 8 times the sheet thickness, and more preferably 7 times the sheet thickness. If the length L of the base portion 6a in the extending direction is less than the lower limit, it may be difficult to form a sufficient space between the central portion 13 and the inner folding piece 9. On the contrary, if the length L of the base portion 6a in the extending direction exceeds the upper limit, the internal space S1 of the box body 20 may be too small.

An inclined portion 6c, which is continuous with the tip edge of the base portion 6a and is inclined with respect to the tip edge of the base portion 6a, is formed at the tip edge of the covering portion 6b. The inclination angle of the inclined portion 6c with respect to the tip edge of the base portion 6a can be, for example, 30° or more and 60° or less. As shown in FIGS. 2 and 3, the covering portion 6b covers the space between the side portion 14 and the second side panel 5 in the state of being assembled in the box body 20. In plan view of the box body 20, the inclined portion 6 c is arranged above the side portion 14 and in parallel with the side portion. In the box sheet 1, the connection panel 6 has the covering portion 6b that covers the space between the side portion 14 and the second side surface panel 5, so that the overall appearance of the box body 20 can be enhanced. Further, in the box sheet 1, by covering the clearance between the side portion 14 and the second side surface panel 5 with the covering portion 6b, it is easy to suppress the actual decrease in the capacity of the internal space S1 of the box body 20.

The connection panel 6 has notches 6d at both ends of the base edge in the width direction for allowing the above-mentioned protrusions 8b formed on the outer folded piece 8 to pass therethrough.

(Second folded panel)
〔Center〕
The central portion 13 has a rectangular shape. The extension direction length of the central portion 13 is substantially equal to the extension direction length of the second side surface panel 5. The central portion 13 is folded back to the inner surface side of the second side surface panel 5 with the outer side folding piece 8 and the inner side folding piece 9 being sandwiched between the second side surface panel 5. The central portion 13 is arranged in parallel with the second side panel 5.

〔side〕
The side portion 14 is connected to the side edge of the central portion 13. The outer side edge 14 a of the side portion 14 is parallel to the side edge of the central portion 13. The total width of the central portion 13 and the pair of side portions 14 arranged on the left and right sides of the central portion 13 (that is, the width of the second folding panel 7) is the distance between the pair of folding portions 12 facing each other in the box body 20. Greater than. As a result, the side portion 14 is bent at the boundary edge with the central portion 13, and the outer side edge 14 a abuts on the inner surface of the folded portion 12. In addition, a reaction force of the sheet acts on the side portion 14 in the direction of releasing the bending in the state of contact with the folding portion 12. As a result, the outer side edge 14a of the side portion 14 and the inner surface of the folded portion 12 interfere with each other, and the side portion 14 is stably held in a state of being inclined in the left-right direction with respect to the central portion 13.

No other panel is connected to the outer side edge 14a of the side portion 14. As a result, in the box sheet 1, the number of panels can be reduced to facilitate the assembly of the box body 20, and the manufacturing cost of the box sheet 1 can be reduced.

The side portion 14 is connected to only the side edge of the central portion 13 including the state where the side portion 14 is assembled in the box body 20. That is, the side portion 14 is not fixed to the panels other than the central portion 13 including the state where the side portion 14 is assembled in the box body 20. Since the box sheet 1 can hold the side portion 14 in an inclined state with respect to the central portion 13 due to the interference between the outer side edge 14a of the side portion 14 and the inner surface of the folding portion 12, the side portion 14 is held in the central portion. The side portion 14 can be stably held in a desired arrangement without being fixed to the panel other than 13.

The side portion 14 is normally bent so as to be inclined inward with respect to the central portion 13. As a result, in the box body 20, as shown in FIG. 3, an inner space S1 having an octagonal shape in plan view is defined by the central portion 13, the side portions 14, and the folding portion 12 of the first folding panel 4. As a result, the box sheet 1 can increase the clearance between the outer edge of the entire box body 20 and the outer edge of the internal space S1 in a plan view, and shows a large internal volume of the articles accommodated in the box body 20. Cheap.

An easy-folding line is formed at the boundary line between the central portion 13 and the pair of side portions 14. It is preferable that the easy folding line includes perforations 23. That is, it is preferable that perforations 23 are formed on the boundary line between the central portion 13 and the pair of side portions 14. Since the perforation 23 is formed on the boundary line, the side sheet 14 of the box sheet 1 can be easily bent in a desired direction.

(Extended piece)
The extension piece 10 has a substantially rectangular shape whose width is larger than the length in the extension direction. The extension direction length of the extension piece 10 is substantially equal to the extension direction length L of the base portion 6 a of the connection panel 6. In the box body 20, the leading edge of the extending piece 10 contacts the inner surface of the second side panel 5. Thereby, the extending piece 10 functions as a spacer that maintains the distance between the central portion 13 and the second side surface panel 5 together with the base portion 6a. As described above, in the box sheet 1, the outer folding piece 8 and the inner folding piece 9 have the notches 8a and 9a that allow the extension piece 10 to pass therethrough, and the tip edge of the extension piece 10 is second. By contacting the inner surface of the side panel 5, the extension piece 10 can be stably held on the bottom panel 2. More specifically, since the extension piece 10 is supported from above by the edges of the cutouts 8a, 9a of the outer folding piece 8 and the inner folding piece 9, the extension piece 10 is lifted from the bottom surface panel 2 on the tip side. It can be suppressed and the extension piece 10 can be stably held on the bottom panel 2. As a result, the central portion 13 can be stably held parallel to the second side surface panel 5.

As shown in FIG. 5, it is preferable that a hollow space S2 is formed between the central portion 13 and the inner folding piece 9 in a state where the extending piece 10 is folded on the bottom panel 2. In the box sheet 1, the space S2 is formed between the central portion 13 and the inner folding piece 9, thereby increasing the clearance between the outer edge of the entire box body 20 and the outer edge of the inner space S1 in a plan view. It is easy to show a large amount of the contents stored in the box 20. Further, it is easy to enhance the cushioning property for the articles accommodated in the box body 20 by using this space S2. Further, since the space S2 is formed between the central portion 13 and the inner folding piece 9, the side portion 14 can be inclined to the space S2 side, and the capacity of the internal space S1 can be easily adjusted.

The box sheet 1 can form the space S2 by adjusting the extending direction lengths of the base 6a and the extending piece 10. The lower limit of the depth D of the space S2 is preferably 1 times the sheet thickness, more preferably 2 times the sheet thickness. On the other hand, the upper limit of the depth D of the space S2 is preferably four times the sheet thickness, and more preferably three times the sheet thickness. If the depth D of the space S2 is less than the above lower limit, it may be difficult to sufficiently increase the clearance between the outer edge of the entire box body 20 and the outer edge of the inner space S1 in a plan view, and the side portion 14 may be closer to the space S2. It may be difficult to bend it. On the contrary, if the depth D of the space S2 exceeds the upper limit, the internal space S1 in the box body 20 may be too small.

<Advantages>
The box sheet 1 includes a pair of first side panels 3 extending from a pair of opposite side edges 2a of a substantially rectangular bottom panel 2 and bent upward, and another pair of opposite side edges of the bottom panel 2. It is provided with a pair of second side surface panels 5 extending from 2b and bent upward, and the outer edge of the entire box body 20 in a plan view is substantially rectangular. In the box sheet 1, the second folded panel 7 folded back to the inner surface side of the second side panel 5 has a rectangular central portion 13 in which the second folded panel 7 is arranged in parallel with the second side panel 5, and the left and right sides of the central portion 13. It has a pair of side parts 14 arranged on both outer sides, and the side parts 14 bring the outer side edges 14a into contact with the inner surface of the folded-back part 12 by the reaction force of the sheet, so Thus, the side portion 14 can be arranged in an inclined state with respect to the first side panel 3 and the second side panel 5 in a plan view. The box sheet 1 enhances handleability by making the entire outer edge in a plan view substantially square and has a large capacity, while making the planar shape of the internal space S1 different from the shape of the outer edge to make the box eye visible. It can be easy to attract. Further, since the box sheet 1 can be held in a state where the side portions 14 are inclined with respect to the central portion 13 due to interference with the folded portion 12 due to the reaction force of the sheet, the desired internal space S1 can be formed easily and reliably. can do.

[Other Embodiments]
The above embodiment does not limit the configuration of the present invention. Therefore, in the above embodiment, it is possible to omit, replace or add the constituent elements of each part of the above 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 first folded panel may be composed of only the folded portion described above.

The bottom panel, the first side panel, and the second side panel may not be provided with notches for engaging the engaging portions of other boxes. Further, the first side panel and the outer foldable piece may not be provided with the protrusions that form the engaging portion.

The box sheet may not include one or both of the outer folding piece and the inner folding piece. Further, it is possible that the leading edge of the extending piece does not contact the inner surface of the second side panel. For example, the tip edge of the extending piece may contact the inner surface of the outer folding piece or the inner folding piece. When the extending piece abuts on the inner surface of the outer folding piece, the outer folding piece may not be provided with a notch for passing the extending piece. Further, when the extending piece abuts on the inner surface of the inner folding piece, not only the outer folding piece but also the inner folding piece need not be formed with a notch for passing the extending piece.

As long as the connection panel functions as a spacer for arranging the central portion in parallel with the second side surface panel, the connection panel has a covering portion that covers a space between the side portion and the second side surface panel in the box body. It is also possible to adopt a configuration that does not.

The easy-to-fold line formed at the boundary between the central portion and the pair of side portions may be, for example, a ruled line formed by pressing one side of the sheet.

As described above, the box sheet according to the present invention can easily attract the eyes while showing a large capacity, and since it is assembled into a box body having excellent handleability, storage of products such as vegetables, transportation and Suitable for sale.

1 Box Sheet 2 Bottom Panels 2a, 2b Side Edges 2c, 3a, 5a, 6d, 8a, 9a Notches 3 First Side Panels 3b, 8b Projections 3c, 12a Openings 4 First Folded Panels 5 Second Side Panels 6 Connection Panel 6a Base portion 6b Covering portion 6c Inclined portion 7 Second folding panel 8 Outer folding piece 9 Inner folding piece 10 Extension piece 11 Connection portion 11a Locking hole 11b Slit 12 Folding portion 13 Central portion 14 Side portion 14a Side edge 15 Inserting piece 20 Box 21 Engagement Part 22 Recess 23 Perforation D Depth of Space Formed Between Center Part and Inner Folding Piece Length of Base Extending Direction S1 Inner Space S2 of Box Body Central Part and Inner Fold Space formed between the pieces

Claims (6)

A box sheet that is formed from one sheet material and can be assembled into a tray-shaped box body,
With a rectangular bottom panel,
A pair of first side panels extending from a pair of opposite side edges of the bottom panel and bent upward;
A pair of first folded panels extending from the leading edge of the first side panel and folded back toward the inner surface of the first side panel;
A pair of second side panels extending from another pair of opposite side edges of the bottom panel and bent upward;
A pair of connection panels extending from the tip edge of the second side panel and bent in parallel with the bottom panel;
A pair of second folding panels extending from the tip edge of the connection panel and folded back to the inner surface side of the second side panel,
The second folded panel has a rectangular central portion that is connected to the connection panel and is arranged in parallel with the second side panel, and a pair of side portions that are arranged on both left and right outer sides of the central portion. Then
The side portion is held inclined with respect to the central portion by bringing the outer side edge into contact with the inner surface of the first folded panel by the reaction force of the sheet ,
A pair of outer folding pieces extending from side edges on both sides in the width direction of the pair of first side panels;
A pair of inner folding pieces that extend from the side edges on both sides in the width direction of the pair of first folding panels and are stacked on the inner surface of the outer folding piece;
An extension piece that extends from the leading edge of the central portion and that is folded over the bottom panel so as to face the connection panel,
Further equipped with,
The central portion is folded back to the inner surface side of the second side panel with the outer folding piece and the inner folding piece sandwiched between the second side panel and
In a state where the extending piece is folded on the bottom panel, a space is formed between the central portion and the inner folding piece,
A box sheet , wherein the connection panel has a base portion connecting the second side panel and the central portion, and an extension direction length of the base portion is 5 times or more a sheet thickness . The box sheet according to claim 1, wherein an inner space having an octagonal shape in plan view is defined by the central portion, the side portion, and the first folded panel. The box sheet according to claim 1 or 2, wherein another panel is not connected to the outer side edge of the side portion. The inner folding piece and the outer folding piece have a notch for passing the extending piece,
The box sheet according to claim 1, claim 2, or claim 3 , wherein a tip edge of the extending piece abuts an inner surface of the second side panel. The box sheet according to any one of claims 1 to 4 , wherein the connection panel has a covering portion that covers a gap between the side portion and the second side panel. The box sheet according to any one of claims 1 to 5 , wherein perforations are formed on a boundary line between the central portion and the pair of side portions.

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