Triangle case

Abstract

To provide a triangle case capable of performing article storage work under high workability.SOLUTION: A triangle case 1 includes a body box 11, a lid box 12, and a connection back plate 13. The body box 11 includes: a triangle bottom plate 111; a pair of body side lateral plates 112; a body side attachment tongue piece 113 connected to a first body side lateral plate 112a at a body side tip fold 11c, folded inside, and attached to a second body side lateral plate 112b; and a pair of flap tongue pieces 114. The lid box 12 includes: a triangle top plate 121; a pair of lid side lateral plates 122; and a lid side attachment tongue piece 123 connected to a first lid side lateral plate 122a at a lid side tip fold 12c, folded inside, and attached to a second lid side lateral plate 122b. The triangle case is mutually deformable between a two-folded state P1 folded by a central folding line 1c, and a fold raised state P2 where folds are raised into a box shape.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an openable triangular case for storing triangular-shaped items. [Background technology]

[0002] Conventionally, openable triangular cases for storing triangular-shaped items have been widely used in various stores (see, for example, Patent Document 1). The triangular case described in Patent Document 1 is designed to store items such as triangularly cut pizza, and is a case consisting of a triangular tubular body box with a bottom and a triangular tubular lid box with a lid, which are connected by a connecting back panel so that they can be opened and closed. Furthermore, this triangular case is stored in a bifold state, folded along a central fold line that passes through the body box, lid box, and connecting back panel, and is opened to store items when used as a case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 04-023615 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned triangular case, when the case is opened from its folded state, the horizontal boards that form the side walls of the main box do not stand upright, so workers must fold and support the horizontal boards while storing items, which tends to reduce the workability of the item storage operation.

[0005] The present invention has an object to solve such problems, that is, to provide a triangular case that allows for high workability in storing items. [Means for solving the problem]

[0006] In order to achieve the above object, the triangular case comprises a body box constituting the portion excluding the back side of a bottomed triangular tube with one side edge at the front end, a lid box constituting the portion excluding the back side of a covered triangular tube with one side edge at the front end and adapted to cover the body box in an openable and closable manner, and a strip-shaped connecting back plate that also serves as the back side of the bottomed triangular tube and the covered triangular tube, and connects the lid box to the body box in an openable and closable manner with the front ends aligned, The body box comprises a triangular bottom plate connected to the connecting back plate with the back edge as a body back board fold, a pair of body side boards connected to the triangular bottom plate in a strip shape with two side edges of the triangular bottom plate other than the body back board fold as body side board folds, a body side attachment tongue piece connected to the first body side board of the pair of body side boards with the leading edge as a body side leading edge fold, folded inward and attached to the second body side board, and the pair of body side boards and each Each of the triangular boxes has a pair of flap tongues that are connected with their rear edge as a body rear end fold and are folded inward, and the lid box has a triangular top plate connected to the connecting back plate with its rear edge as a lid back plate fold, a pair of lid side horizontal plates that are connected to the triangular top plate in a strip-like shape with each of the two side edges of the triangular top plate other than the lid back plate fold as lid side horizontal plate folds, and a lid side attached tongue that is connected to a first lid side horizontal plate of the pair of lid side horizontal plates with its front edge as a lid front end fold, folded inward and attached to a second lid side horizontal plate, and is characterized in that the body box, the lid box, and the connecting back plate are capable of being transformed between a folded state in which they are folded in half along a central fold line connecting the front end vertex of the triangular bottom plate and the front end vertex of the triangular top plate, and a folded-up state in which they are opened from the folded state and the body box and lid box are each folded up into a box shape. [Effects of the Invention]

[0007] The above-described triangular case allows for the storage of items with high workability. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a triangular case according to one embodiment in a closed state with the lid box closed. FIG. [Figure 2]2 is a three-view diagram showing the triangular case shown in FIG. 1 in a closed state. FIG. [Figure 3] 2 is a perspective view showing the triangular case shown in FIG. 1 in a folded state in which the flap tongues are not folded in and the cover wall is open and folded in half. FIG. [Figure 4] 1. FIG. 4 is a diagram showing the shape change of the triangular case shown in FIG. 1 from the folded state shown in FIG. 3 to the closed state shown in FIG. [Figure 5] 2 is a plan view showing a plate-like member in an unfolded shape for forming the triangular case shown in FIG. 1. FIG. [Figure 6] 6 is a diagram showing how a triangular case is made in a folded state by folding and pasting the die-cut, unfolded plate-like material shown in FIG. 5. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the triangular case will now be described.

[0010] Fig. 1 is a perspective view showing a triangular case according to one embodiment in a closed state with the lid box closed, and Fig. 2 is a three-view diagram showing the triangular case in the closed state shown in Fig. 1. Fig. 3 is a perspective view showing the triangular case shown in Fig. 1 in a folded state with the lid wall open. Fig. 4 is a diagram showing the shape change of the triangular case shown in Fig. 1 from the folded state shown in Fig. 3 to the closed state shown in Fig. 1. Fig. 5 is a plan view showing an unfolded plate-like member for forming the triangular case shown in Fig. 1.

[0011] The triangular case 1 of this embodiment is an openable and closable paper container for storing items in a substantially equilateral triangle shape, such as rice balls, and includes a body box 11, a lid box 12, and a connecting back panel 13.

[0012] The body box 11 is a box portion for storing items, constituting the portion of the bottomed regular triangular tube with one side edge 1a excluding the back side 1b. The lid box 12 is a box-shaped lid portion that constitutes the portion of the top-end regular triangular tube with one side edge 1a excluding the back side 1b and is placed over the body box 11 in an openable and closable manner. The connecting back plate 13 is a strip-shaped plate portion that also serves as the back side 1b of the bottomed regular triangular tube and the top-end regular triangular tube, and connects the lid box 12 to the body box 11 so that the front sides 1a are aligned and openable and closable.

[0013] Here, the body box 11 comprises a triangular bottom plate 111, a pair of body side horizontal plates 112, a body side attachment tongue piece 113, and a pair of flap tongue pieces 114.

[0014] The triangular bottom plate 111 is a triangular plate-shaped portion connected to the connecting back plate 13 at its back edge along body back plate fold line 11a. The pair of body side horizontal plates 112 are a pair of rectangular plate-shaped portions each connected to the triangular bottom plate 111 in a strip-like manner along body side horizontal plate fold lines 11b at the two side edges of the triangular bottom plate 111 other than body back plate fold line 11a. The body side attachment tongue 113 is a tongue-shaped portion connected to the first body side horizontal plate 112a of the pair of body side horizontal plates 112 at the body side front edge fold line 11c, folded inward, and attached to the second body side horizontal plate 112b. The pair of flap tongues 114 are a pair of tongue-shaped portions connected to each of the pair of body side horizontal plates 112 at the back side edge 1b along body side rear end fold line 11d and folded inward.

[0015] The lid box 12 also includes a triangular top plate 121, a pair of lid-side side plates 122, and a lid-side adhesive tongue piece 123.

[0016] The triangular top plate 121 is a triangular plate-shaped portion connected to the connecting back plate 13 at the edge of the back side 1b as lid-side back plate fold 12a. The pair of lid-side side plates 122 are a pair of rectangular plate-shaped portions each connected to the triangular top plate 121 in a strip-like manner at the two side edges other than the lid-side back plate fold 12a as lid-side side plate folds 12b. The lid-side attached tongue piece 123 is a tongue-shaped portion connected to the first lid-side side plate 122a of the pair of lid-side side plates 122 at the edge of the tip side 1a as lid-side tip fold 12c, folded inward, and attached to the second lid-side side plate 122b.

[0017] The body box 11, lid box 12, and connecting back panel 13 are capable of being transformed between a folded state P1 shown in Figures 3 and 4 and a folded state P2 shown in Figures 1, 2, and 4. The folded state P2 includes an open state P21 in which the lid box 12 is open and a closed state P22 in which the lid box 12 is closed; Figures 1 and 2 show the closed state P22 in the folded state P2, and Figure 4 shows both the open state P21 and the closed state P22.

[0018] In the folded-in-two state P1, the main box 11, the lid box 12, and the connecting back panel 13 are folded in half along the central fold line 1c connecting the tip vertex 111a of the triangular bottom panel 111 and the tip vertex 121a of the triangular top panel 121. In the folded-up state P2, the triangular case 1 is opened from the folded-in-two state P1 and the main box 11 and the lid box 12 are each folded up into a box shape. In this folded-up state P2, the triangular case 1 can be opened and closed between an open state P21 and a closed state P22.

[0019] In this embodiment, each of the pair of flap tongues 114 is formed to be in the state shown in Fig. 3. That is, the pair of flap tongues 114 are formed so that when the pair of flap tongues 114 are overlapped in an unfolded state in the folded state P1, the top-side flap side edge 114a is a side edge that extends linearly over a predetermined length along the center fold line 1c. The top-side flap side edge 114a is the side edge of each flap tongue 114 that faces the triangular top panel 121 when the lid box 12 is closed. Furthermore, in each flap tongue 114, as shown in Figs. 3 and 5, the angle θ11 formed between the top-side flap side edge 114a and the body-side rear end fold 11d is an acute angle. When viewed from the central fold line 1c, the top plate side flap edge 114a of the flap tongue piece 114 extending from the body side horizontal plate 112 extending obliquely along the side edge of the triangular bottom plate 111 faces toward the central fold line 1c and is aligned with it because the above angle θ11 becomes an acute angle.

[0020] Each flap tongue 114 has a recess 114c formed in the bottom-side flap edge 114b. This recess 114c is located on the bottom-side flap edge 114b near the apex 111b of the back side 1b of the triangular bottom plate 111. The recess 114c extends from a starting point 114d, located along the rear body-side fold 11d, away from the apex 111b of the back side 1b of the triangular bottom plate 111, to the tip of the flap tongue 114. The formation of this recess 114c creates a predetermined gap d11 between the bottom-side flap edge 114b near the apex 111b of the back side 1b of the triangular bottom plate 111 and the side edge 131 of the connecting back plate 13.

[0021] In this embodiment, the connecting back panel 13 is formed in a trapezoidal shape with the lid-side back panel fold 12a longer than the body-side back panel fold 11a. This allows the triangular top panel 121 connected to the lid-side back panel fold 12a, i.e., the lid box 12, to be formed slightly larger than the body box 11.

[0022] In this embodiment, the leading edge 1a of each of the pair of body side horizontal plates 112 of the body box 11 is formed as follows. That is, the angle θ12 formed between the edge 112c of the leading edge 1a of each body side horizontal plate 112 and the body side horizontal plate fold 11b is an obtuse angle, and the angle θ13 formed between the body side opening side edge 112d opposite the body side horizontal plate fold 11b and the edge 112c of the leading edge 1a is an acute angle. As a result, the leading edge 1a of the body box 11 is shaped to protrude outward toward the opening, as shown in FIGS. 1 and 2. Furthermore, the leading edge 1a of each of the pair of lid side horizontal plates 122 of the lid box 12 is formed as follows. That is, the angle θ14 formed between the edge 122c of the tip side 1a of each lid side horizontal plate 122 and the lid side horizontal plate fold 12b is an acute angle, and the angle θ15 formed between the lid side opening side edge 122d opposite the lid side horizontal plate fold 12b and the edge 122c of the tip side 1a is an obtuse angle. As a result, the shape of the tip side 1a of the lid box 12 that covers the body box 11 also bulges outward as it approaches the triangular top plate 121, as shown in Figures 1 and 2.

[0023] In this embodiment, a tongue-shaped locking projection 112e is formed in the middle of the edge 112c of the tip side 1a of the second body side horizontal plate 112b. A locking slit 122e is formed in the lid side tip fold 12c, which is the boundary between the first lid side horizontal plate 122a and the lid side adhesive tongue 123, and into which the locking projection 112e fits when the lid box 12 is closed, as shown in Figures 1 and 2.

[0024] In this embodiment, the inner surfaces of the main box 11, the lid box 12, and the connecting back plate 13 are covered with a resin film 14. This resin film 14 is a transparent film and is attached to the entire surfaces that will become the inner surfaces of the main box 11, the lid box 12, and the connecting back plate 13 when the plate-like object 1-1 is in the unfolded shape shown in FIG. 5. Here, a window hole 124 is formed in the lid box 12, penetrating the triangular top plate 121, and this window hole 124 is formed so as to penetrate a triangular area extending from the triangular top plate 121 to the connecting back plate 13. The window hole 124 is covered from the inside by the resin film 14 (transparent film) attached to the entire surface of the plate-like object 1-1. This window hole 124 with the film makes it possible to see into the inside of the triangular case 1 when the lid is closed.

[0025] Since the window hole 124 penetrates the triangular area extending from the triangular top panel 121 to the connecting back panel 13, the lid-side back panel fold 12a of the lid box 12 is divided into two line segments by the window hole 124. In this embodiment, the triangular case 1 includes the main box 11, the lid box 12, and the connecting back panel 13, and is formed by bending a single sheet of paper material 1-1 as shown in FIG. 5 . The lid-side side panel fold 12b, which is closest to the window hole 124 as described above, is a fold formed by a shallow notch extending partway along the thickness of the paper on the outer surface of the lid box 12. This notch enhances the bendability of the lid-side side panel fold 12b. Furthermore, because the lid-side back panel fold 12a divided by the window hole 124 has short sides, it is easy to fold even a simple fold.

[0026] In addition, the above-mentioned triangular case 1 is produced and stored in the above-mentioned folded state P1 by folding and attaching the die-cut, unfolded plate-like object 1-1 shown in Figure 5, and when storing items, it is opened and transformed into the folded-up state P2 for use.

[0027] FIG. 6 is a diagram showing how a triangular case is made in a folded state by folding and adhering the die-cut, unfolded plate-like material shown in FIG.

[0028] The process of converting an unfolded plate-like object 1-1 into a triangular case 1 in a folded state P1 is performed by an automatic machine (not shown) while the plate-like object 1-1 is conveyed in a conveying direction D11 along the center fold line 1c. The conveying path R11 is a passage partitioned by a pair of guide walls T11. The pair of top-side flap side edges 114a, which are aligned with each other across the center fold line 1c in the unfolded state, slide against the pair of guide walls T11 as the plate-like object 1-1 is conveyed along the conveying path R11, where it is subjected to a folding and gluing process. First, the body-side gluing piece 113 and the lid-side gluing piece 123 of the unfolded plate-like object 1-1 are folded inward, and adhesive B11 is applied to the second body-side horizontal plate 112b and the second lid-side horizontal plate 122b. At this time, the folded-in body-side attached tab 113 and lid-side attached tab 123 are held down by belt T12 to maintain the folded shape. In this state, plate-like object 1-1 is folded in half at center fold line 1c in folding direction D12, whereby body-side attached tab 113 and lid-side attached tab 123 are attached to second body-side horizontal plate 112b and second lid-side horizontal plate 122b, completing triangular case 1 in folded state P1. As described above, triangular case 1 is stored in this folded state P1, and when used to store items, it is folded from folded state P1 to folded state P2.

[0029] According to the triangular case 1 of the embodiment described above, the pair of body-side horizontal plates 112 of the body box 11 are connected to each other at the leading end 1a of the body box 11 via the body-side adhesive tongue 113. Similarly, the pair of lid-side horizontal plates 122 of the lid box 12 are connected to each other at the leading end 1a of the lid box 12 via the lid-side adhesive tongue 123. Due to these two connections, when the triangular case 1 is opened from the folded state P1, as shown in FIG. 4, the pair of body-side horizontal plates 112 pull each other at the leading end 1a and become independent from the triangular bottom plate 111, and the body box 11 is folded up into a box shape. In addition, the pair of lid-side horizontal plates 122 pull each other at the leading end 1a and become independent from the triangular top plate 121, and the lid box 12 is folded up into a box shape. Because both the body-side horizontal plates 112 and the lid-side horizontal plates 122 are self-supporting, workers can perform item storage operations without worrying about these horizontal plate portions. In this way, the triangular case 1 of this embodiment allows for high workability in storing items.

[0030] At this time, the triangular case folded in half can be produced with a small number of steps, as shown in Figure 6, by folding the body-side attachment tab 113 and the lid-side attachment tab 123 inward and then folding them in half while attaching them to the second body-side horizontal plate 112b and the second lid-side horizontal plate 122b. In other words, the triangular case 1 of this embodiment can be produced at reduced manufacturing costs by reducing the number of steps.

[0031] In this embodiment, the top-side flap side edges 114a of each of the pair of flap tongues 114 are side edges that extend linearly along the center fold line 1c in the folded state P2. With this configuration, in the unfolded plate-shaped object 1-1, the pair of top-side flap side edges 114a form a pair of linear outermost edges that run parallel to each other, sandwiching the center fold line 1c between them. When the plate-shaped object 1-1 is folded into the triangular case 1 in the folded state P2, these pair of top-side flap side edges 114a can be used as excellent transport guides when transporting the plate-shaped object 1-1, as shown in FIG. 6 .

[0032] In this embodiment, the angle θ11 between the top-side flap edge 114a of each flap tongue 114 and the body-side rear end fold 11d is an acute angle. With this configuration, the top-side flap edge 114a of the flap tongue 114 from the body-side horizontal board 112, which is oblique when viewed from the center fold line 1c, can be directed toward and smoothly aligned with the center fold line 1c.

[0033] In this embodiment, the bottom-side flap edge 114b of each flap tongue 114 extends from a starting point 114d, which is distant from a vertex 111b of the triangular bottom plate 111, toward the tip end. This configuration separates the bottom-side flap edge 114b from the side edge 131 of the connecting back plate 13 in the unfolded plate-like object 1-1 near the vertex 111b. This separation creates a gap d11 between the side edge 131 of the connecting back plate 13 and the bottom-side flap edge 114b, allowing for smooth die-cutting of the unfolded plate-like object 1-1, improving the ease of die-cutting. This also improves the ease of die-cutting.

[0034] In this embodiment, the connecting back panel 13 is formed in a trapezoidal shape with the lid-side back panel fold 12a longer than the body-side back panel fold 11a. This configuration allows the lid box 12 to be formed slightly larger than the body box 11, improving the workability when placing the lid box 12 over the body box 11 and closing it.

[0035] In this embodiment, the angle θ12 between the edge 112c of the tip side 1a of each body side panel 112 and the body side panel fold 11b is an obtuse angle, and the angle θ13 between the body side opening side edge 112d and the edge 112c is an acute angle. The angle θ14 between the edge 122c of the tip side 1a of each lid side panel 122 and the lid side panel fold 12b is an acute angle, and the angle θ15 between the lid side opening side edge 122d and the edge 122c is an obtuse angle. This configuration allows the tip side 1a of the body box 11 to bulge outward on the opening side, and the tip side 1a of the lid box 12 that fits over the body box 11 to bulge outward on the top panel side. As a result, when the lid box 12 is closed, the tip side 1a of the lid box 12 engages with the tip side 1a of the body box 11, maintaining the lid in a good closed state.

[0036] In this embodiment, a locking projection 112e is formed on the second body side horizontal plate 112b, and a locking slit 122e is formed in the lid-side leading edge fold 122c. With this configuration, when the lid box 12 is closed, the locking projection 112e on the body box 11 is fitted into and locked with the locking slit 122e on the lid box 12, which also helps maintain the lid closed state.

[0037] In this embodiment, the inner surfaces of the body box 11, the lid box 12, and the connecting back panel 13 are each covered with a resin film 14. This configuration prevents direct contact between the inner surface of the triangular case 1 and the stored items, and protects the inner surface of the triangular case 1 and the stored items from dirt and other issues that may result from contact.

[0038] In this embodiment, the resin film 14 is a transparent film, and the window hole 124 provided in the lid box 12 is covered with the transparent film. With this configuration, the stored items can be seen through the window hole 124 covered with the transparent film, so even when stored in the triangular case 1, the stored items can be displayed on a store shelf or the like while still visually appealing.

[0039] In this embodiment, the window hole 124 is formed to penetrate the range from the triangular top plate 121 to the connecting back plate 13. With this configuration, the window hole 124 extends toward the connecting back plate 13, which is preferable because it widens the range in which the stored items can be visually appealing.

[0040] In this embodiment, the body box 11, the lid box 12, and the connecting back panel 13 are formed from a single sheet of paper material, and the lid-side horizontal panel fold 12b is a fold formed by a cut halfway in the thickness direction of the paper on the outer surface of the lid box 12. The lid-side horizontal panel fold 12b is difficult to bend because it is close to the window hole 124, but with the above-mentioned configuration, the cut on the outer surface can improve bendability to compensate for the above-mentioned difficulty in bending.

[0041] The above-described embodiment merely shows a typical example, and the triangular case is not limited to this embodiment. In other words, a person skilled in the art can implement various modifications in accordance with conventionally known knowledge.

[0042] For example, in the above-described embodiment, a triangular case 1 having an appearance of a regular triangular prism and adapted to store items having a substantially equilateral triangular shape, such as rice balls, is exemplified as an example of a triangular case. However, the triangular case is not limited to this. The triangular case may also store items other than rice balls, such as sliced ​​pizza, and its appearance may also be another triangular prism shape, such as an isosceles triangular prism, as long as it is triangular prism-shaped, and may be appropriately set to match the shape of the stored items.

[0043] In the above-described embodiment, a triangular case 1 made of paper is given as an example of a triangular case. However, the triangular case is not limited to this. The triangular case may be made of any material that can be folded along the creases, such as a thin plastic case, and the specific material of the triangular case is not important.

[0044] Furthermore, in the above-described embodiment, an example of a triangular case is illustrated as a triangular case 1 in which a pair of top-side flap side edges 114a form a pair of linear outermost edges that are aligned with each other across a central fold line 1c in the unfolded shape of the plate-like object 1-1. However, the triangular case is not limited to this. The pair of flap tongues in the triangular case can have any specific shape, such as the top-side flap side edges, as long as they are tongue-shaped portions that are connected to each of the pair of body side panels and folded inward. However, as described above, providing a pair of top-side flap side edges 114a that form a pair of linear outermost edges in the unfolded shape of the plate-like object 1-1 can be used as an effective conveyance guide when the triangular case 1 is assembled.

[0045] In the above-described embodiment, the triangular case 1 is exemplified as an example of a triangular case in which the angle θ11 between the top-side flap edge 114a and the body-side rear fold 11d is an acute angle. However, the triangular case is not limited to this, and the angle between the top-side flap edge of each flap tongue and the body-side rear fold can be set to any angle. However, as described above, by setting the angle θ11 to an acute angle, the top-side flap edge 114a of each flap tongue 114 can be aligned well along the center fold line 1c.

[0046] Furthermore, in the above-described embodiment, as an example of a triangular case, a triangular case 1 in which the bottom-side flap side edge 114b extends from a starting point 114d away from a vertex 111b of the triangular bottom plate 111 to the tip side is exemplified. However, the triangular case is not limited to this, and the bottom-side flap side edge may extend from a vertex of the triangular bottom plate. However, as described above, by separating the starting point 114d of the bottom-side flap side edge 114b from the vertex 111b of the triangular bottom plate 111, the workability of the die-cutting operation for the unfolded plate-like object 1-1 and the workability of the folding operation for the flap tongue can be improved.

[0047] In the above-described embodiment, a triangular case 1 having a trapezoidal connecting back plate 13 in which the lid side is longer than the body side is exemplified as an example of a triangular case. However, the triangular case is not limited to this, and may have, for example, a rectangular connecting back plate in which the lid side and the body side are the same length. However, as described above, by making the connecting back plate 13 the trapezoidal connecting back plate, the lid box 12 can be made larger than the body box 11, thereby improving the workability of the lid closing operation.

[0048] Furthermore, in the above-described embodiment, as an example of a triangular case, a triangular case 1 is illustrated in which the body side horizontal plate 112 has an obtuse angle on the bottom side at the tip end 1a and an acute angle on the opening side, and the lid side horizontal plate 122 has an acute angle on the top side at the tip end 1a and an obtuse angle on the opening side. However, the triangular case is not limited to this, and may have, for example, both the body side horizontal plate and the lid side horizontal plate as simple rectangular plates. However, as described above, by making the angle shapes of the tip end sides 1a of both the body side horizontal plate 112 and the lid side horizontal plate 122 into the above-described shapes, the tip end side 1a of the lid box 12 can be engaged with the tip end side 1a of the body box 11 when the lid is closed, thereby maintaining the lid in a good closed state.

[0049] Furthermore, in the above-described embodiment, as an example of a triangular case, a triangular case 1 is exemplified in which a locking protrusion 112e is provided on the tip side 1a of the main box 11 and a locking slit 122e is provided on the tip side 1a of the lid box 12. However, the triangular case is not limited to this, and may have a structure in which the main box and the lid box do not have a locking protrusion or a locking slit. However, as described above, by providing the locking protrusion 112e and the locking slit 122e, the closed state of the lid can be maintained well.

[0050] In the above-described embodiment, the triangular case 1 is exemplified as an example of a triangular case in which the inner surfaces of the body box 11, lid box 12, and connecting back panel 13 are each covered with a resin film 14. However, the triangular case is not limited to this, and may have no resin film attached to the inner surface. However, as described above, by covering the inner surface with the resin film 14, the inner surface of the triangular case 1 and the stored items can be protected from dirt due to contact, etc.

[0051] Furthermore, in the above-described embodiment, as an example of a triangular case, a triangular case 1 in which a window hole 124 provided in the lid box 12 is covered with a transparent film as the resin film 14 is exemplified. However, the triangular case is not limited to this, and the resin film may be opaque, or no window hole may be provided. However, as described above, by providing a window hole 124 and covering it with a transparent resin film 14, the stored items can be displayed on a store shelf or the like while being visually appealing.

[0052] Furthermore, in the above-described embodiment, a triangular case 1 in which the window hole 124 is provided so as to overlap the connecting back panel 13 is exemplified as an example of a triangular case. However, the triangular case is not limited to this, and the window hole may be provided only in the triangular top panel of the lid box. However, as mentioned above, extending the window hole to the connecting back panel can expand the range in which the stored items can be visually appealing. Note that in this embodiment, a triangular window hole 124 is exemplified as an example of a window hole, but the shape of the window hole is not limited to a triangle and can be any shape, such as a circle, a square, or a star. Furthermore, the window hole may be provided in places other than the triangular top panel or the connecting back panel.

[0053] Furthermore, in the above-described embodiment, as an example of a triangular case, a triangular case 1 in which the lid-side horizontal fold 12b is a fold in which a notch is formed on the outer surface of the lid box 12 is exemplified. However, the triangular case is not limited to this, and the lid-side horizontal fold may be a simple fold in which no notch is formed. However, as described above, by using the lid-side horizontal fold 12b in which a notch is formed on the outer surface, it is possible to improve the bendability of the lid-side horizontal fold 12b even if the distance to the window hole 124 is close. [Explanation of symbols]

[0054] 1 Triangular Case 1-1 Expanded plate-shaped object 1a Tip side 1b Back side 1c Center broken line 11 Body box 11a Back panel fold 11b Body side horizontal board fold 11c Body side tip fold 11d Back fold of the body 12 Lid box 12a Folding of the back panel on the lid side 12b Folding of the lid side panel 12c Fold at the tip of the lid 13 Connecting back plate 14 Resin film 111 Triangular bottom plate 111a, 121a Tip side apex 111b One vertex 112 Side board 112a 1st body side horizontal plate 112b 2nd body side horizontal board 112c,122c edge 112d body side opening side edge 112e Locking protrusion 113 Body side attached tongue piece 114 Flap tongue 114a Top flap edge 114b Bottom plate side flap edge 114c concave part 114d starting point 121 Triangular Top Plate 122 Lid side horizontal plate 122a 1st lid side horizontal plate 122b 2nd lid side horizontal plate 122d Lid side opening side edge 122e Locking slit 123 Lid side adhesive tongue 124 Window Hole 131 Side edge d11 gap B11 Adhesive D11 Conveying direction D12 Folding direction P1 Folded state P2 Folded up state P21 Lid open state P22 Closed lid R11 transport path T11 Guide Wall T12 Belt θ11 Angle between the edge of the flap on the top side and the fold at the rear end of the body side θ12 Angle between the edge of the tip of the body side board and the fold of the body side board θ13 Angle between the side edge of the body opening and the edge of the tip of the body side horizontal board θ14 Angle between the tip edge of the lid side horizontal plate and the fold of the lid side horizontal plate θ15 Angle between the edge of the lid opening and the edge of the tip of the lid side horizontal plate

Claims

1. a body box constituting a portion of a bottomed triangular tube with one side edge at the tip, excluding the back side; A lid box that constitutes a portion of a covered triangular tube with one side edge at the tip side, excluding the back side, and that can be opened and closed to cover the body box; A strip-shaped connecting back plate that serves as the back side of each of the bottomed triangular tube and the lidded triangular tube and connects the lid box to the body box so that the tip sides are aligned and can be opened and closed. The body box, A triangular bottom plate connected to the connecting back plate with the edge on the back side as the fold of the body back plate; A pair of body side boards connected to the triangular bottom board in a strip-like manner at two side edges of the triangular bottom board other than the body back board fold as body side board folds; A body side attachment tongue piece is connected to the first body side board of the pair of body side boards at its leading edge as a body side leading edge fold, folded inward, and attached to the second body side board; A pair of flap tongue pieces are provided, each of which is connected to the pair of body side horizontal boards at its rear edge as a body side rear end fold line and is folded inward, The lid box is A triangular top plate connected to the connecting back plate with the edge on the back side as a fold on the lid side back plate; A pair of lid-side horizontal plates connected to the triangular top plate in a strip-like manner, with each of the two side edges of the triangular top plate other than the lid-side back plate fold as a lid-side horizontal plate fold; a lid-side attachment tongue piece whose leading edge is connected to the first lid-side horizontal plate of the pair of lid-side horizontal plates as a lid-side leading edge fold, and which is folded inward and attached to the second lid-side horizontal plate; The triangular case is characterized in that it can be transformed between a folded state in which the body box, the lid box, and the connecting back plate are folded in half along a central fold line connecting the tip vertex of the triangular bottom plate and the tip vertex of the triangular top plate, and a folded state in which the body box and the lid box are each folded up into a box shape when opened from the folded state.

2. The triangular case of claim 1, characterized in that the top-side flap side edge of each of the pair of flap tongues that faces the triangular top plate when the lid box is closed becomes a side edge that extends linearly for a predetermined length along the central fold line when the pair of flap tongues are overlapped in an unfolded state in the folded-in state.

3. 2. The triangular case according to claim 1, wherein the connecting back plate is formed in a trapezoidal shape in which the fold of the cover-side back plate is longer than the fold of the body-side back plate.

4. The angle formed by the leading edge of each of the pair of body side boards and the fold of the body side board is an obtuse angle, and the angle formed by the body side opening side edge opposite to the fold of the body side board and the leading edge is an acute angle, The triangular case of claim 1, characterized in that the angle between the tip edge of each of the pair of lid side horizontal plates and the fold of the lid side horizontal plate is an acute angle, and the angle between the tip edge of the lid side opening side edge opposite the fold of the lid side horizontal plate and the edge is an obtuse angle.

5. 2. The triangular case according to claim 1, wherein the inner surfaces of the body box, the lid box, and the connecting back plate are each covered with a resin film.

6. the resin film is a transparent film, 6. The triangular case according to claim 5, wherein the lid box has a window hole that penetrates at least the triangular top plate, and the window hole is covered with the transparent film.

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