Tatami mat for coffins

Abstract

To provide a tatami for a coffin which can reinforce the coffin, and can suppress the dew condensation of a coffin surface.SOLUTION: A tatami 10 for a coffin comprises a tatami floor 12 composed of a reinforcing cardboard material which is laid on a bottom plate 2a in the coffin 1, and a tatami facing 13 arranged on a surface of the tatami floor 12. Blades 14 composed of the reinforcing cardboard materials are arranged at left-and-right sides of the tatami floor 12 in a coffin width direction. A folded groove M2 which can make the left-and-right blades 14 substantially-vertically erect from the tatami floor 12 is formed at a cardboard surface of a boundary part between the tatami floor 12 and the blades 14. When the tatami floor 12 is laid on the bottom plate 2a in the coffin 1, the left-and-right blades 14 are superimposed on left-and-right side plates in the coffin by the folded groove M2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tatami mat for a coffin, and more particularly to a tatami mat for a coffin that is suitable for use in a foldable cardboard coffin. [Background technology]

[0002] Foldable cardboard coffins made of reinforced cardboard have been known for some time. This type of cardboard coffin has retractable side panels on the left and right of the bottom, which can be raised when needed. The left and right side panels have folding grooves made by processing the surface of the reinforced cardboard. For example, as shown in Figure 8, a cardboard coffin 1 has retractable side panels 3, 3 on the upper left and right sides of a rectangular bottom box 2. The side panels 3, 3 can be folded toward the inside of the coffin via folding grooves M1 (see Figure 7) cut into the cardboard surface inside the coffin in a V-shaped cross section. Folding plates 4, 4 are connected to the front and rear of the side plates 3, 3, and these are placed on the front and rear of the bottom box 2. When assembling the cardboard coffin 1, as shown in Figure 8, with the left and right side panels 3, 3 standing upright, the downward-facing U-shaped end panels 5 are placed over the folding margin panels 4, 4 and then dropped down to the bottom box 2. This locks the left and right side panels 3, 3 in their upright position. By assembling the cardboard coffin 1 in this manner, the coffin can be folded compactly before use, and can be quickly prepared when needed for a funeral or other occasion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 6-52005 [Patent Document 2] Japanese Patent Application Publication No. 11-155917 [Patent Document 3] Japanese Patent Application Laid-Open No. 2017-38663 Summary of the Invention [Problem to be solved by the invention]

[0004] The key to these foldable cardboard coffins is to minimize the thickness of the cardboard to take advantage of its excellent combustibility and lightweight properties. For this reason, various innovations have been made in the structure and materials of the coffins. However, with conventional cardboard coffins, when trying to reduce the thickness of the cardboard material, the durability of the main components such as the bottom and side panels could not be ensured sufficiently. In particular, with the folding cardboard coffin mentioned above, deformation and crushing easily occur near the bending groove M1 of the side panels, making the problem of insufficient strength a prominent issue.

[0005] Another problem with reducing the thickness of cardboard is the risk of condensation on the surface of the coffin due to reduced insulation. For example, if a coolant such as dry ice is placed inside the coffin during a funeral, a cold spot will form on the outer surface of the coffin (the surface of the side panels) near the coolant, and condensation will form in this area, making the coffin look unsightly.

[0006] To address these issues, the inventors focused on coffin tatami mats made of reinforced corrugated cardboard. By laying such coffin tatami mats inside a cardboard coffin, it is possible to reinforce the bottom board in addition to providing an interior decoration effect. Furthermore, the use of reinforced corrugated cardboard does not impair the properties of the cardboard coffin. By further improving this type of coffin tatami mat, we succeeded in reinforcing the coffin while effectively suppressing condensation on the surface of the coffin, which led to the invention of the present invention. The object of the present invention is to provide a tatami mat for a coffin that can reinforce the coffin and prevent condensation on the surface of the coffin.

[0007] Prior art related to conventional tatami mats for coffins is disclosed in Patent Documents 1 to 3, but all of these are primarily intended to decorate the inside of the coffin, and no mats are known that are designed to reinforce the coffin or prevent condensation. [Means for solving the problem]

[0008] [First Invention] The coffin tatami mat of the present invention, which is intended to solve the above problems, has the following features. A tatami mat (12) made of reinforced cardboard material laid on the bottom plate (2a) inside the coffin (1); A tatami mat for a coffin, comprising a tatami facing (13) provided on the surface of the tatami floor, Slats (14) made of reinforced corrugated cardboard are provided on the left and right sides of the tatami floor in the width direction of the coffin, and bending grooves (M2) that are provided on the corrugated board surface at the boundary between the tatami mat and the slats, and that allow the left and right slats to rise up almost vertically relative to the tatami mat, The coffin is A rectangular bottom box (2), and foldable side plates (3) provided on the upper left and right sides of the bottom box, When the left and right side panels are folded down on the bottom box, the left and right slats are placed face down on the front or back side of the tatami mat through the folding grooves, and can be stored in the coffin. When the left and right side panels are raised on the bottom box, the left and right slats can be raised to overlap the left and right side panels via the folding grooves with the tatami mat laid on the bottom panel of the bottom box. The composition was as follows.

[0009] According to the first aspect of the invention, when a tatami mat is laid on the bottom board inside the coffin and the left and right slats are raised vertically, the left and right slats overlap the side boards inside the coffin. This allows the tatami mat to reinforce the bottom board, and the slats to reinforce the side boards. Furthermore, the tatami mat and slats are connected via a folding groove, which prevents the slats from shifting or warping. As a result, the tatami mat and slats can be stacked integrally on the bottom and side panels of the coffin, significantly enhancing the reinforcing effect. Therefore, even if the thickness of the cardboard material in a cardboard coffin is reduced, the durability of the main parts such as the bottom and side panels can be sufficiently ensured. In a foldable cardboard coffin, the slats can effectively prevent deformation and crushing that tend to occur near the folding grooves of the side panels.

[0010] Furthermore, by overlapping the tatami floor and slats on the bottom and side panels of the coffin, the thickness of the coffin from the bottom to the sides is increased, significantly improving the insulation effect. As a result, when a coolant such as dry ice is placed inside the coffin, condensation on the surface of the coffin (the outer surface of the side panels) can be effectively prevented.

[0011] [Second Invention] The coffin tatami mat of the second invention has the same configuration as the first invention, but the folding groove (M2) is located at the boundary between the tatami mat floor (12) and the slats (14), on the cardboard surface opposite the tatami mat covering (13).

[0012] According to the second aspect of the invention, the slats that are raised on the left and right sides of the tatami floor can be folded inward using the folding grooves. Therefore, when the coffin tatami mat is not in use, the slats can be stored inside the coffin in a face-down position, and when needed, the slats can be raised and placed on the side panels inside the coffin. In other words, the slats can be quickly switched from a face-down position to a face-up position, making it easier to assemble the coffin tatami mat inside the coffin. After the slats are stacked on the side panels inside the coffin and raised, they can be fixed to the side panels with a fastening means such as double-sided tape to prevent the slats from falling over.

[0013] [Third Invention] The coffin tatami mat of the third invention has the same structure as the first invention, but the folding groove (M3: see Figures 6 and 7) is formed at the boundary between the tatami mat floor (12) and the slats (14), and has a V-shaped cross section with a groove angle of approximately 90° on the corrugated board surface facing the tatami mat surface (13).

[0014] According to the third invention, when the slats are bent along the folding grooves on the left and right sides of the tatami floor, the slats, raised from a horizontal position, rise almost vertically and stop. At this time, the V-shaped folding grooves close, preventing the slats from tipping inward, and stabilizing their standing state inside the coffin.

[0015] [1st to 3rd Inventions] The coffin tatami mats according to the first to third inventions are effective when applied to foldable cardboard coffins, but similar effects can be obtained when used with non-foldable cardboard coffins as well as wooden coffins. The tatami mats can be made from natural rush grass, similar to regular tatami mats, or sheets with a tatami pattern printed on them. It is also possible to use cardboard with a tatami pattern printed directly on the surface. The first to third inventions may be combined with other inventions described in this specification as necessary. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view showing a tatami mat for a coffin according to a first embodiment. [Figure 2] (A) is a cross-sectional view showing the folded state of the tatami mat for the coffin, and (B) is an enlarged partial view showing the reinforced cardboard material of the tatami mat for the coffin. [Figure 3] (A) is a partially cutaway cross-sectional view showing the unfolded state of the same tatami mat for a coffin, and (B) is an enlarged cross-sectional view showing the folding grooves of the same tatami mat for a coffin. [Figure 4] This shows the folded state of the same coffin tatami mat, (A) is a cross-sectional view, and (B) is a partially cut-away plan view. [Figure 5] This explains how to use the coffin tatami mat, with (A) being a cross-sectional view showing the state in which the coffin tatami mat is used inside a folding cardboard coffin, and (B) being a cross-sectional view showing the state in which the coffin tatami mat is stored inside a folding cardboard coffin. [Figure 6] 1 shows a coffin tatami mat according to a second embodiment, where (A) is a partially cutaway cross-sectional view showing the unfolded state of the coffin tatami mat, and (B) is a partially enlarged cross-sectional view showing the folding grooves of the coffin tatami mat. [Figure 7] This explains how to use the coffin tatami mat of the second embodiment, where (A) is a cross-sectional view showing the state in which the coffin tatami mat is used inside a foldable cardboard coffin, and (B) is a cross-sectional view showing the state in which the coffin tatami mat is stored inside a foldable cardboard coffin. [Figure 8] This is a perspective view showing a folding cardboard coffin. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are examples of application of the present invention, and the scope of the invention is not limited to these embodiments.

[0018] [First embodiment] 1 to 5 show a coffin tatami mat 10 according to a first embodiment. The coffin tatami mat 10 is used in a folding cardboard coffin 1 (see Figure 8), and comprises a tatami mat floor 12 made of reinforced cardboard material that is laid on the bottom plate 2a inside the coffin, and a tatami surface 13 that is placed on top of it. As shown in Figure 2, the tatami surface 13 woven from natural rush grass is attached to the surface of the tatami mat floor 12. Edges 13a are provided on both the left and right ends of the tatami surface 13, and these edges 13a and the tatami surface 13 are sewn to the tatami mat floor 12 made of reinforced cardboard material. The tatami surface 13 is visible inside the cardboard coffin 1, giving the inside of the coffin a Japanese style look. The dimensions of the cardboard coffin 1 are, for example, a front-to-back length (long side) of approximately 170 to 200 cm, a left-to-right width (short side) of approximately 50 to 70 cm, and a height of approximately 40 to 50 cm.

[0019] The reinforced corrugated cardboard used is a two-layered reinforced corrugated cardboard material (such as that manufactured by Tri-Wall Co., Ltd.) with a thickness of approximately 10 to 15 mm. As shown in Figure 2(B), this reinforced corrugated cardboard material is made by laminating two layers of corrugated sheets r1 and r2 between two liners Rb and Rf with a partition plate r3 in between, thereby enhancing pressure resistance and water resistance. In this embodiment, both the cardboard coffin 1 and the coffin tatami mat 10 are made of double-layered reinforced cardboard material.

[0020] As shown in Figure 2(A), slats 14, 14 are connected to the left and right sides of the tatami floor 12 in the width direction of the coffin. These slats 14, 14 are formed integrally with the tatami floor 12 from reinforced corrugated cardboard, and a bending groove M2 is provided at the boundary between the tatami floor 12 and the slats 14, 14. The bending groove M2 allows the slats 14, 14 to rise from a horizontal position relative to the tatami floor 12 to an almost vertical standing position (see Figure 5(A)).

[0021] The folding groove M2 is the boundary between the tatami mat floor 12 and the slats 14, 14, and is formed by making a cut in the surface of the cardboard opposite the tatami facing 13 (see Figure 3). This cut runs along the back side of the cardboard material, that is, from bottom to top in Figure 3, in an I-shaped cross section, separating the other layers and leaving only the liner Rf on the front side. The tatami mat floor 12 and the slats 14, 14 are connected only by the liner Rf, and when the slats 14, 14 are folded against the tatami mat floor 12, the connecting part of the liner Rf acts as a hinge.

[0022] The size of the tatami floor 12 is set so that its length in the front-to-back direction roughly matches the length of the bottom plate 2a inside the cardboard coffin 1, and its left-to-right width is set shorter by two cardboard thicknesses than the width of the bottom plate 2a inside the cardboard coffin 1. As a result, when the slats 14, 14 are raised on the left and right sides of the tatami floor 12 inside the cardboard coffin 1, the slats 14, 14 are positioned so that they overlap the left and right side plates 3, 3 (see Figure 5(A)).

[0023] The size of the slats 14, 14 is set so that their length in the front-to-back direction matches the tatami mat floor 12 and their left-to-right width is higher than the folding groove M2 of the side panel 3 when it is standing (see Figure 5(A)). In other words, when the slats 14, 14 stand up on the left and right sides of the tatami mat floor 12 inside the cardboard coffin 1, the folding groove M2 of the side panel 3 will be hidden by the slats 14, 14.

[0024] Furthermore, the left and right widths of the slats 14, 14 are each shorter than half the left and right width of the tatami mat floor 12. This prevents the tips of the slats 14, 14 from hitting each other and interfering with each other when the slats 14, 14 are laid down on the tatami mat floor 12 (see Figure 5(B)).

[0025] Double-sided tape 15 is attached to the back surface (lower side in FIG. 3) of the slats 14, 14. This double-sided tape 15 is continuous with a substantially constant width in the length direction of the slats 14, 14. The front side of the double-sided tape 15 is left with release paper attached.

[0026] Next, how to use the coffin tatami mat 10 will be described. Before using the cardboard coffin 1, as shown in Figure 5(B), the slats 14, 14 of the coffin tatami mat 10 are folded inward and stored inside the folded cardboard coffin 1. Because the coffin tatami mat 10 is sized to fit inside the bottom box 2 of the cardboard coffin 1, the coffin tatami mat 10 does not get in the way when the side panels 3 of the cardboard coffin 1 are folded down.

[0027] When using the cardboard coffin 1, the side panels 3 are raised above the bottom box 2, as shown in Figure 5(A). Then, as shown in Figure 8, the end panels 5 are placed over the folding strips 4, 4 to lock the side panels 3, 3 in their raised position. After assembling the cardboard coffin 1 in this way, the left and right slats 14, 14 are raised almost vertically while the coffin tatami mat 10 is left on the bottom plate 2a. Next, the release paper is peeled off the double-sided tape 15, and the slats 14, 14 are attached to the inside of the side plates 3, whereby the slats 14, 14 and the side plates 3 overlap and are fixed in place. It is desirable to erect the slats 14, 14 after assembling the cardboard coffin 1 as described above, but it may be done during the assembly process.

[0028] According to the coffin tatami mat 10 of the first embodiment, when the tatami floor 12 is laid inside the cardboard coffin 1 and the slats 14, 14 are raised, the slats 14, 14 overlap the side panels 3 inside the cardboard coffin 1. This allows the tatami floor 12 to reinforce the bottom panel 2a, and the slats 14, 14 to reinforce the side panels 3.

[0029] Furthermore, because the tatami floor 12 and the slats 14, 14 are connected via the folding grooves M2, this connection prevents the tatami floor 12 and the slats 14, 14 from shifting or bending. In other words, because the tatami floor 12 and the slats 14, 14 are connected at the folded portions of the cardboard liner Rf, the movement of both panels is restricted. As a result, the tatami floor 12 and the slats 14, 14 can be stacked integrally on the bottom panel 2a and side panels 3 of the cardboard coffin 1, which significantly enhances the reinforcing effect of the cardboard coffin 1 compared to using both panels independently.

[0030] Therefore, even if the thickness of the cardboard material of the cardboard coffin 1 is reduced, it is possible to ensure sufficient durability of the main parts such as the bottom plate 2a and side plates 3. In particular, the strength tends to be insufficient around the bending groove M2 of the collapsible side plate 3, but by overlapping the slats 14, 14 of the coffin tatami mat 10 over such areas, deformation and crushing around the groove can be effectively prevented.

[0031] Furthermore, according to the first embodiment of the coffin tatami mat 10, the tatami floor 12 and slats 14, 14 are overlapped on the bottom plate 2a and side plate 3 of the cardboard coffin 1, respectively, thereby increasing the thickness of the cardboard material from the bottom to the sides of the coffin, thereby significantly improving the insulating effect. As a result, as shown in Figure 5(A), even if a cooling material C such as dry ice is placed inside the cardboard coffin 1 during a funeral, the cold air from the cooling material C is blocked by the two layers of cardboard made up of the side panels 3 and the slats 14, 14, effectively preventing condensation from forming on the outer surface of the cardboard coffin 1.

[0032] Furthermore, in the coffin tatami mat 10 of the first embodiment, the slats 14, 14 that are raised on the left and right sides of the tatami floor 12 can be folded inward using the folding grooves M2. Therefore, when the coffin tatami mat 10 is not in use, the slats 14, 14 can be stored inside the coffin with the slats 14, 14 lying down, and when needed, the slats 14, 14 can be raised and placed on the side panels 3 inside the coffin. In other words, the slats 14, 14 can be quickly switched from a lying down state to a standing state, which simplifies the process of assembling the coffin tatami mat 10 inside the coffin.

[0033] [Second embodiment] Next, a coffin tatami mat 20 according to a second embodiment will be described. As shown in Figures 6 and 7, the tatami mat 20 for the coffin has a folding groove M3 with a V-shaped cross section at the boundary between the tatami mat floor 12 and the slats 14, 14. This folding groove M3 is the boundary between the tatami mat floor 12 and the slats 14, 14, and is formed by cutting a V-groove into the surface of the corrugated cardboard facing the tatami facing 13. This cut runs from top to bottom on the front side of the corrugated cardboard, in other words, in Figure 6, in a V-shaped cross section, separating the other layers and leaving only the liner Rb on the back side. The tatami mat floor 12 and the slats 14, 14 are connected only by the liner Rb, and when the slats 14, 14 are folded against the tatami mat floor 12, the connecting portion of the liner Rb acts as a hinge.

[0034] The groove angle of the bending groove M3 is set to approximately 90°. As a result, when the slats 14, 14 are bent to the maximum extent relative to the tatami mat floor 12, the groove surfaces of the V-groove close and the slats 14, 14 stop in an almost vertically standing position.

[0035] The size of the tatami floor 12 is set so that its length in the front-to-back direction and width in the left-to-right direction approximately match the length and width of the bottom plate 2a inside the cardboard coffin 1. As a result, when the slats 14, 14 are raised on the left and right sides of the tatami floor 12 inside the cardboard coffin 1, the slats 14, 14 are positioned so that they overlap the left and right side plates 3, 3 (see Figure 7(A)). The size of the slats 14, 14 is set to a length that hides the folding grooves M2 of the side panels 3 when they are erected inside the cardboard coffin 1, as in the first embodiment.

[0036] Before the coffin tatami mat 20 is used in the cardboard coffin 1, as shown in Figure 7(B), it is folded and stacked so that the slats 14, 14 wrap around the back side of the tatami mat floor 12. As a result, the coffin tatami mat 20 takes on a compact form with the tatami mat floor 12 and the slats 14, 14 stacked on top of each other, just like in the first embodiment, so it can be stored inside the bottom box 2 of the cardboard coffin 1.

[0037] When using the coffin tatami mat 20 in the cardboard coffin 1, first, the side panels 3, 3 are opened outward and the coffin tatami mat 20 stored in the bottom box 2 is temporarily removed. Next, the slats 14, 14 are raised almost vertically to the tatami mat floor 12 and the tatami mat is placed back into the bottom box 2. In this state, the side panels 3, 3 of the cardboard coffin 1 are raised, and the slats 14, 14 are attached and fixed to the side panels 3, 3 with the double-sided tape 15 of the slats 14, 14. The upright state of the side panels 3, 3 is then locked with the end panel 5, and the cardboard coffin 1 is completed.

[0038] According to the second embodiment of the coffin tatami mat 20, when the tatami floor 12 is laid inside the cardboard coffin 1 and the left and right slats 14, 14 are raised, the left and right slats 14, 14 overlap the side panels 3 inside the coffin. This allows the tatami floor 12 to reinforce the bottom panel 2a, and the slats 14, 14 to reinforce the side panels 3.

[0039] Furthermore, the tatami floor 12 and the slats 14, 14 are connected via the bending groove M3, which prevents misalignment or bending of the tatami floor 12 and the slats 14, 14. As a result, the tatami floor 12 and the slats 14, 14 can be stacked integrally on the bottom plate 2a and side plates 3 of the cardboard coffin 1, significantly enhancing the reinforcing effect.

[0040] Furthermore, with the coffin tatami mat 20 of the second embodiment, the tatami floor 12 and slats 14, 14 overlap the bottom plate 2a and side plate 3 of the cardboard coffin 1, respectively, greatly improving the insulating effect from the bottom to the sides of the coffin. As a result, even if a coolant C such as dry ice is placed inside the cardboard coffin 1 during a funeral, the cold air from the coolant C is blocked by the two layers of cardboard made up of the side plate 3 and the slats 14, 14, effectively preventing condensation from forming on the outer surface of the cardboard coffin 1.

[0041] Furthermore, in the second embodiment of the coffin tatami mat 20, when the slats 14, 14 are folded along the folding grooves M3 on the left and right sides of the tatami floor 12, the slats 14, 14 that have been raised from a horizontal position rise to a nearly vertical position and stop. At this time, the folding grooves M3 close, preventing the slats 14, 14 from falling inward, and thus stabilizing the raised state inside the coffin.

[0042] [Variations] Although the first and second embodiments of the coffin tatami mat have been described above, the embodiments of the present invention are not limited to these configurations and may involve various modifications and changes. In the above embodiment, a two-layered reinforced corrugated cardboard material is used, but a single-layered or three-layered or more reinforced corrugated cardboard material may also be used. Alternatively, a honeycomb-structured reinforced corrugated cardboard material may also be used. It is desirable to cut the tatami mat 12 and the slats 14, 14 integrally from a single piece of corrugated cardboard, but they can also be cut separately and connected together with a cloth or sheet. In this case, the boundary between the adjacent tatami mat 12 and slats 14, 14 becomes a folded groove.

[0043] In addition, in the above embodiment, natural rush grass is used for the tatami facing 13, but instead, a sheet with a tatami pattern printed on it may be attached to the surface of the tatami floor 12. It is also possible to print the tatami pattern directly on the surface of the tatami floor 12. The tatami facing 13 may also be extended from the tatami floor 12 to the slats 14, 14.

[0044] The double-sided tape 15 on the slats 14, 14 may be replaced with adhesive or fasteners as long as it can secure the slats 14, 14 to the side panels 3 of the cardboard coffin 1. Other fastening means such as hook-and-loop fasteners can also be used. In the coffin tatami mat 20 of the second embodiment, the slats 14, 14 are unlikely to fall inside the coffin, so fastening means such as double-sided tape 15 can be omitted. [Explanation of symbols]

[0045] 1. Cardboard coffin (foldable cardboard coffin) 2 · Bottom box 2a...Bottom plate 3 Side panel 10. Coffin tatami mat 12 ···Tatami floor 13 Tatami mat 13a Edge 14 ··Slats 15 Double-sided tape M1, M2, M3....Bending groove

Claims

1. A tatami mat made of reinforced cardboard material laid on the bottom board inside the coffin; A tatami mat for a coffin, which is provided with a tatami surface that is placed on the surface of the tatami floor, Slats made of reinforced corrugated cardboard are provided on the left and right sides of the tatami mat in the width direction of the coffin; and a folding groove provided on the surface of the corrugated board at the boundary between the tatami mat and the slats, which allows the left and right slats to stand up almost vertically relative to the tatami mat, The coffin is A rectangular bottom box, and foldable side panels provided on the upper left and right sides of the bottom box, When the left and right side panels are folded down on the bottom box, the left and right slats are placed face down on the front or back side of the tatami mat through the folding grooves, and can be stored in the coffin. When the left and right side panels are raised on the bottom box, the left and right slats can be raised to overlap the left and right side panels via the folding grooves with the tatami floor laid on the bottom panel of the bottom box.

2. 2. The tatami mat for a coffin according to claim 1, wherein the folding groove is provided at the boundary between the tatami mat floor and the slats, on the corrugated board surface opposite the tatami mat surface.

3. 2. A tatami mat for a coffin according to claim 1, wherein the folding groove is formed at the boundary between the tatami mat floor and the slats on the corrugated board surface on the tatami surface side, with a V-shaped cross section and a groove angle of approximately 90 degrees.

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