Metal fitting and coffin assembled without metal nail

Abstract

To provide metal fittings and a coffin assembled without metal nails capable of simplifying an assembly work process, achieving easy and smooth assembly, and reducing the space required for the assembly work.SOLUTION: A coffin 100 includes a bottom plate, side plate parts 20a, 20b, end plate parts 30a, 30b, and a stationary member 60 and a lid plate 40 which fix all the parts above and are formed of an inflammable material, with all components of the coffin formed of the inflammable material. The side plate parts and one plate part of the end plate parts are attached to the bottom plate, and the other plate part is disposed to be orthogonal to one plate part in plane view. The stationary member includes a first member 61a disposed in one plate part on the side of the inner surface of the coffin, and a second member 61b disposed on a face of the other plate part on the side of the inner surface of the coffin. One member of the first member and the second member includes an insertion part 69 having a shape projecting from the inner surface side, which is to be inserted into the other member, and the other member includes a reception part 66 having a shape projecting from the inner surface side, which receives the insertion part. In the stationary member, the insertion part engages with the reception part.SELECTED DRAWING: Figure 16

Description

[Technical field]

[0001] The present disclosure relates to hardware and nailless prefabricated caskets. [Background technology]

[0002] Traditionally, coffins in which bodies are placed and cremated have a wooden main structure with a box body made of flammable materials. Generally, rectangular coffins are made up of two side panels, two gable panels, a bottom panel, and a lid panel.

[0003] Conventionally, the joints between the side panels and the gable panel, and the joints between the bottom panel and the side panels or the gable panel, were fixed with metal fittings such as metal nails and tacker pins, and metal nails. In addition, a door for viewing the body was rotatably fixed to the cover panel with a metal hinge. For this reason, the metal fittings and metal nails used for each coffin are 45 to 60 metal nails, 45 to 50 tacker pins, 8 to 12 pin tackers, and 6 to 10 decorative fittings, and the average weight of the entire coffin is about 150g to 170g. In addition, assuming that the number of funerals held per year is 1.3 million, the amount of metal fittings and metal nails discarded from cremation per year is 195 to 221 tons.

[0004] In addition, the inventor visited more than 150 city halls and crematoriums throughout the country and found that there were common problems related to the emission of carbon dioxide and dioxins at crematoriums, problems with the disposal of burial goods at the time of placement in the coffin, dry ice, metals and nails used in the coffin after cremation, and damage to the crematorium.

[0005] Furthermore, he was deeply distressed when he looked directly at the inside of the crematorium and saw the horrific scenes of metal nails piercing the flesh and bones during cremation, and the countless metal objects remaining after cremation. Metal objects remaining after cremation are sorted and organized by a disposal company. The crematorium also had a major problem with metal objects damaging the pipes.

[0006] As mentioned above, the presence of a large number of metal fittings and nails, etc., causes damage to the body and remains during cremation and combustion of the coffin, which is problematic from the perspective of the dignity of the deceased. In addition, there are problems such as the time required for on-site staff to collect the metal fittings and nails after cremation, and the fact that metal fittings and nails are mixed into the ashes that are ultimately left behind, damaging the suction pipe when sucking it up, requiring time and money for maintenance, and making some furnaces unusable.

[0007] In addition, generally, when metal fittings and nails are used in the manufacture of a coffin, harmful substances (e.g. dioxin or carbon dioxide) are generated when the coffin is burned. The generation of these harmful substances is an important issue that must be resolved by the government office that has jurisdiction over the crematorium or the on-site staff at the crematorium.

[0008] For these reasons, it is preferable to avoid using metal fittings and nails as much as possible when manufacturing a coffin. The inventor had many questions about why the above-mentioned tragic facts were not known even though many years have passed since burial was replaced by cremation, and thought that something had to be done after learning about this reality. Then, in order to improve the environment, streamline cremation operations, and protect the dignity of the body and the soul, the inventor began to investigate conventional coffins and develop a coffin that does not use metal fittings and nails. For example, Patent Document 1 by the inventor discloses a coffin that includes a bottom plate, two side walls, two gable walls, a plurality of nail members made of a combustible material that mechanically joins the bottom plate and the side walls, and a plurality of nail members made of a combustible material that mechanically joins the bottom plate and the gable walls.

[0009] Furthermore, the inventor has devised a coffin that can reduce the space required in the user's facility to store the assembled coffin when the metal fittings- and nail-free coffin described in the above Patent Document 1 is delivered to the user in an assembled state. For example, Patent Document 2 by the inventor discloses a metal fittings- and nail-free prefabricated coffin, all of whose components are made of flammable materials, which includes a bottom plate, side plate support members, side plate portions, end plate portions, and a cover plate, the side plate portions are fixed to the side plate support members via plastic hinges and are configured to be foldable inward by the plastic hinges, the end plate portions are detachably engaged with the side plate portions, and the cover plate is disposed on the side plate portions and the end plate portions. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Patent No. 6911218 [Patent Document 2] Utility Model Registration No. 3235376 Summary of the Invention

[0011] Here, when the prefabricated coffin without metal fittings and metal nails described in the above Patent Document 2 is delivered to a user in an unassembled state, it is necessary to secure space within the user's facility for assembly. Therefore, one of the objectives of the present disclosure is to provide a prefabricated coffin without metal fittings and metal nails that simplifies the work process for assembling a prefabricated coffin, reduces costs, realizes easy and smooth assembly, and requires less space for assembly.

[0012] According to one embodiment, the coffin is a prefabricated coffin without metal fittings and metal nails, all of whose components are made of a combustible material, and includes a bottom plate, a pair of side plates, a pair of end plates, a fixing member made of a combustible material that fixes each of the pair of end plates and the pair of side plates, and a cover plate arranged on the pair of side plates and the pair of end plates. One of the pair of side plates and the pair of end plates is attached to the bottom plate, and the other plate is arranged perpendicular to the one plate in a plan view. The fixing member has a first member arranged on the inner surface of the coffin when attached to the bottom plate of the one plate, and a second member arranged on a surface that becomes the inner surface of the coffin when assembled to the one plate of the other plate. One of the first and second members includes an insertion portion having a shape protruding from the inner surface side that is inserted into the other member, and the other member includes a receiving portion having a shape protruding from the inner surface side that receives the insertion portion. The fixing member is configured so that the insertion portion and the receiving portion engage with each other.

[0013] Further details will be described in the following embodiments. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view showing the appearance of a coffin according to an embodiment. [Diagram 2] FIG. 2 is a perspective view of the bottom plate, side plate support members, and end plate support members of the coffin of FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along the short side, showing a schematic configuration of the coffin after it has been assembled. [Figure 4] FIG. 4 is a cross-sectional view taken along the short side, showing a schematic configuration of the coffin before it is assembled. [Diagram 5] FIG. 5 is a longitudinal cross-sectional view showing a schematic configuration of the coffin. [Figure 6] FIG. 6 is a cross-sectional view showing the internal configuration of the side plate portion. [Figure 7] FIG. 7 is a view showing a part of the configuration of the side plate portion as viewed in the X1 direction. [Figure 8]FIG. 8 is a view showing a part of the configuration of the side plate portion as viewed in the X2 direction. [Figure 9] FIG. 9 is a perspective view of a portion of the inside of the coffin from the end plate side before the end plates are engaged. [Figure 10] FIG. 10 is a view of the end plate portion viewed in the Y1 direction. [Figure 11] FIG. 11 is a view of the side plate portion viewed in the Y2 direction. [Figure 12] FIG. 12 is a side view of the side plate portion as viewed in the Z2 direction. [Figure 13] FIG. 13 is a cross-sectional view of the side plate portion. [Figure 14] FIG. 14 is a side view of the end plate portion as viewed in the X2 direction. [Figure 15] FIG. 15 is a side view of the end plate portion as viewed in the Z2 direction. [Figure 16] FIG. 16 is a diagram showing the configuration of the fixing member as viewed in the Z2 direction. [Figure 17] FIG. 17 is a diagram for explaining a fixing method using a fixing member, in which (A) shows a state before fixing, and (B) shows a fixed state. [Figure 18] FIG. 18 is a diagram for explaining a method of positioning the end plate portions 30a and 30b from a state in which the side plate portions are raised while the coffin is being assembled. [Figure 19] FIG. 19 is a view of the end plate side fixing member according to the third modified example, viewed in the X2 direction. [Figure 20] FIG. 20 is a diagram illustrating a fixed state of the fixing member according to the third modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] <1. Overview of the prefabricated coffin without metal fittings or nails> (1) The metal fittings and nailless prefabricated coffin according to the embodiment are all made of combustible material, and include a bottom plate, a pair of side plates, a pair of end plates, a fixing member made of combustible material that fixes each of the pair of end plates and the pair of side plates, and a cover plate arranged on the pair of side plates and the pair of end plates. One of the pair of side plates and the pair of end plates is attached to the bottom plate, and the other plate is arranged perpendicular to the one plate in a plan view. The fixing member has a first member arranged on the inner surface of the coffin when attached to the bottom plate of the one plate, and a second member arranged on the surface that becomes the inner surface of the coffin when assembled to the one plate of the other plate. One of the first and second members includes an insertion portion having a shape protruding from the inner surface side that is inserted into the other member, and the other member includes a receiving portion having a shape protruding from the inner surface side that receives the insertion portion. The fixing member is configured so that the insertion portion and the receiving portion engage with each other.

[0016] As described later, the one plate portion is, for example, a pair of side plates, and the other plate portion is, for example, a pair of end plates. In this case, according to the above configuration, the side plates can be folded and the end plates can be removed from the side plates when delivered. This reduces the space required to store the coffin in the user's facility, reducing storage costs and transportation costs.

[0017] In addition, since the fixing member is configured so that the insertion portion and the receiving portion engage with each other, when assembling the coffin according to the embodiment, the end plate portion is raised in the height direction perpendicular to the bottom plate relative to the side plate portion attached to the bottom plate, and slid downward, so that the insertion portion engages with and is fixed to the receiving portion. This simplifies the assembly process and realizes easy and smooth assembly.

[0018] When one plate portion is a pair of end plates and the other plate portion is a pair of side plates, the side plates are lifted in a height direction perpendicular to the bottom plate relative to the end plates attached to the bottom plate, and slid downward, so that the insertion portion engages with the receiving portion and is fixed. Therefore, in this case as well, the assembly process can be simplified. Also, easy and smooth assembly is realized. Also, the space required for assembling the coffin can be reduced.

[0019] (2) In the prefabricated coffin without metal fittings and nails of (1), preferably, the fixing of the pair of end panels to the pair of side panels includes fixing the movement of the other panel in at least the direction approaching the bottom panel among the directions perpendicular to the bottom panel relative to one panel, and in the normal direction to the other panel. This suppresses rattling between the end panel and the side panel.

[0020] (3) In the prefabricated coffin without metal fittings and nails of (2), preferably, at least two first members are arranged on the inner surface of each of the first plates in a direction perpendicular to the bottom plate, and the second members are arranged on the surface of the other plate in positions corresponding to the first members when the first plates are attached to the first plates. This further reduces rattling between the end plates and the side plates.

[0021] (4) In the metal fittings and nailless prefabricated coffin of (1) to (3), preferably, the insertion portion protrudes from the inner surface side where it is arranged, forms a sandwiching space for sandwiching the receiving portion between the inner surface side and has a shape extending in a direction perpendicular to the bottom plate, whereby the insertion portion is inserted into the receiving portion in the sandwiching space for sandwiching the receiving portion formed between the insertion portion and the inner surface side where it is arranged.

[0022] (5) In the metal fittings and nailless prefabricated coffin of (1) to (4), preferably, the receiving portion protrudes from the inner surface side where it is placed and has a hook shape oriented in such a way that the insertion portion is inserted. With this, when the insertion portion is inserted, the portion protruding from the inner surface side where it is placed is sandwiched and engaged with the insertion portion.

[0023] (6) In the prefabricated coffin without metal fittings and nails as described in (1) to (5), preferably, the length of the insertion part and the receiving part in the direction perpendicular to the bottom plate is shorter than the length of the one plate part attached to the bottom plate in the direction perpendicular to the bottom plate. This makes the length of the downward sliding shorter than the length of the side plate part in the direction perpendicular to the bottom plate. This allows for easy and smooth assembly. Also, the space required for assembling the coffin can be reduced.

[0024] (7) The prefabricated coffin without metal fittings and metal nails according to (1) to (6) preferably further comprises a pair of first support members arranged on a part of the edge portion of the bottom plate, and the one plate portion is fixed to each of the pair of first support members via a fixing member that fixes it rotatably, and each is configured to be foldable inward by the fixing member that fixes it rotatably. The fixing member that fixes it rotatably is also made of a flammable material. With this configuration, the coffin can be delivered to a user with the one plate portion folded and the other plate portion removed from the one plate portion. This reduces the space required to store the coffin. When using the coffin, the user can easily assemble the coffin without metal fittings and metal nails by raising the folded one plate portion against the bottom plate portion, attaching the other plate portion to the inner surface of the one plate portion, and placing the cover plate on the pair of side plates and the pair of end plates.

[0025] (8) In the prefabricated coffin without metal fittings and nails of (7), preferably, the fixing member for rotatably fixing is a hinge. The first plate includes a crosspiece, two plate members sandwiching the crosspiece from both sides, and a reinforcing member fixed to the surface of the inner plate member of the two plate members or to the crosspiece. The hinge includes a first blade fixed to the first support member, a second blade fixed to the reinforcing member, and a connecting portion between the first blade and the second blade, which allows the second blade to rotate relative to the first blade. This allows a cavity to be formed inside the first plate, making the first plate lighter. And since the second blade of the hinge is fixed to the reinforcing member, even if the first plate is lighter and the plate member of the first plate is thin, the reinforcing member can increase the joint strength with the hinge.

[0026] (9) The metal fittings-free and nail-free prefabricated coffin of (7) or (8) preferably further comprises a second support member disposed at a position facing one of the other plate portions on the edge portion of the bottom plate. The length of the second support member in the direction perpendicular to the bottom plate is shorter than the length of the first support member in the direction perpendicular to the bottom plate. This allows the second support member to support the other plate portion, and even when the second support member is provided, interference between the second support member and the first support member can be prevented.

[0027] (10) In the prefabricated coffin without metal fittings and nails according to (1) to (9), preferably, the one plate portion is a pair of side plate portions and the other plate portion is a pair of end plate portions. Alternatively, the one plate portion may be a pair of end plate portions and the other plate portion may be a pair of side plate portions.

[0028] (11) In the metal fittings and nailless prefabricated coffin according to (1) to (0), preferably, the one member is the second member and the other member is the first member. Alternatively, the one member may be the first member and the other member may be the second member.

[0029] <2. Example of a prefabricated coffin without metal fittings or nails> [Overall structure of prefabricated coffin without metal fittings or nails] FIG. 1 is a perspective view showing the appearance of a coffin 100 according to an embodiment. The body of a human or pet (pet animal) is placed inside the coffin 100. FIG. 2 is a perspective view of the bottom plate 10, side plate support members 11a, 11b, and end plate support members 12a, 12b of the coffin 100. FIG. 3 is a cross-sectional view along the short side of the coffin 100, which shows a schematic configuration of the state after the coffin 100 has been assembled (second state). FIG. 4 is a cross-sectional view along the short side of the coffin 100, which shows a schematic configuration of the state before the coffin 100 has been assembled (first state). FIG. 5 is a cross-sectional view along the longitudinal direction of the coffin 100, which shows a schematic configuration of the coffin 100. When the term "longitudinal direction" is used simply, it means the longitudinal direction of the rectangular coffin 100 in plan view, and when the term "transverse direction" is used, it means the transverse direction perpendicular to the longitudinal direction of the coffin 100 in plan view.

[0030] All components of the coffin 100 are made of flammable materials. The flammable materials are not particularly limited, but include, for example, wood, various resin materials, plastic, and polycarbonate. In addition to the above, the flammable materials include flammable nonmetallic materials and flammable glass materials (for example, glass fiber, etc.). In addition to the above materials, flammable materials made of calcareous matter such as shells can be used as fastener materials. The fasteners may be wooden dowels, plastic nails, plastic tackers, wooden nails, bamboo nails, or polymer resin staples and pinnels.

[0031] The coffin 100 is a collapsible coffin and is configured so that the user can assemble it without using tools. Specifically, when the coffin 100 is transported or stored, the coffin 100 is in the first state shown in FIG. 4. In the first state, the side plate portions 20a and 20b are folded toward the inside of the coffin 100 relative to the bottom plate 10, and the end plate portions 30a and 30b (see FIG. 1) are removed from the side plate portions 20a and 20b. When a body is placed in the coffin 100, the coffin 100 is in the second state shown in FIG. 3. In the second state, the side plate portions 20a and 20b are raised in a direction perpendicular to the bottom plate 10 (Z1 direction), and as shown in FIG. 5, the end plate portions 30a and 30b are attached to the side plate portions 20a and 20b, and the cover plate 40 is arranged.

[0032] As shown in Fig. 1, coffin 100 is configured as a rectangular parallelepiped and includes a bottom plate 10, a pair of side plate portions 20a, 20b that form the long side surfaces of coffin 100, a pair of end plate portions 30a, 30b that form the short side surfaces of coffin 100, and a cover plate 40. Cover plate 40 includes a door 41 that is arranged at a viewing window of cover plate 40. This door 41 may be configured to open both ways (double doors), or may be configured to slide to open and close the viewing window.

[0033] Examples of materials for the bottom plate 10, the side plate portions 20a, 20b, the end plate portions 30a, 30b, and the cover plate 40 include flammable materials such as paulownia wood, cypress wood, fir wood, etc. Although not shown, the outer surfaces of the side plate portions 20a, 20b, the end plate portions 30a, 30b, and the cover plate 40 may be decorated to improve their appearance.

[0034] (Configuration of bottom plate, side plate support member, and end plate support member) As shown in FIG. 2, the bottom plate 10 has a rectangular shape in a plan view. Side plate support members (first support members) 11a and 11b are arranged at positions along two long sides of the four edge portions of the bottom plate 10. End plate support members (second support members) 12a and 12b are arranged at positions along two short sides of the four edge portions of the bottom plate 10. The side plate support members 11a and 11b and the end plate support members 12a and 12b are each fixed to the bottom plate 10 by fasteners (e.g., wooden dowels) or adhesive. The side plate support members 11a and 11b each have a rectangular prism shape extending in the longitudinal direction (Y direction) of the bottom plate 10. The end plate support members 12a and 12b each have a rectangular prism shape extending in the lateral direction (X direction) of the bottom plate 10. Each of the side plate support members 11a, 11b and the end plate support members 12a, 12b is made of a square timber. A "square timber" refers to a member having a square prism shape with no hollow space formed inside.

[0035] As shown in Fig. 3, the side plate support member 11a is disposed in a position facing the side plate reinforcing member 21a on the lower side (Z2 direction) of the side plate portion 20a. The side plate support member 11b is disposed in a position facing the side plate reinforcing member 21b on the lower side (Z2 direction) of the side plate portion 20b. The length L1 of the side plate support member 11a in a direction perpendicular to the bottom plate 10 is greater than the length L2 of the side plate support member 11b in a direction perpendicular to the bottom plate 10 (L1>L2). As a result, as shown in Fig. 4, in the first state in which the side plate portions 20a and 20b are folded, the side plate portion 20a is disposed above the side plate portion 20b, and the side plate portion 20b does not interfere with the side plate portion 20a.

[0036] As shown in FIG. 5, the lid plate support members 12a and 12b are respectively disposed at positions facing the lid plate portions 30a and 30b. The lengths of the lid plate support members 12a and 12b in the direction orthogonal to the bottom plate 10 are both L3. The length L3 is smaller than the length L1 (see FIG. 3) of the side plate support member 11a (L3 < L1), and is smaller than the length L2 (see FIG. 3) of the side plate support member 11b (L3 < L2). Thereby, when the side plate portions 20a and 20b are folded, the side plate portions 20a and 20b do not interfere with the lid plate support members 12a and 12b.

[0037] (Configuration of side plate portion, hinge, lid plate portion, and fixing member) As shown in FIG. 3, the side plate portions 20a and 20b are disposed in a direction perpendicular to the bottom plate 10. The side plate portion 20a includes a side plate reinforcing member 21a, plate members 22a and 23a, an upper cross member 24a, and a lower cross member 25a. The side plate portion 20b includes a side plate reinforcing member 21b, plate members 22b and 23b, an upper cross member 24b, and a lower cross member 25b.

[0038] As shown in FIGS. 3 and 4, the side plate reinforcing member 21a is rotatably fixed to the side plate support member 11a via a hinge 50a. The side plate reinforcing member 21b is rotatably fixed to the side plate support member 11b via a hinge 50b. The side plate reinforcing member 21a is fixed to the plate member 22a constituting the inner surface of the coffin 100 by a joining member such as an adhesive or a wooden dowel. The side plate reinforcing member 21b is fixed to the plate member 22b constituting the inner surface of the coffin 100 by a joining member such as an adhesive or a wooden dowel.

[0039] As shown in Fig. 3, plate members 22a, 23a are arranged to sandwich upper crosspiece 24a and lower crosspiece 25a from both sides. Plate members 22b, 23b are arranged to sandwich upper crosspiece 24b and lower crosspiece 25b from both sides. That is, the inside of side plate portions 20a, 20b each includes a cavity. This allows the weight of coffin 100 to be reduced. Furthermore, lower crosspieces 25a, 25b are in contact with side plate support members 11a, 11b, respectively, when coffin 100 is assembled, as shown in Fig. 3, and are separated from side plate support members 11a, 11b, respectively, before coffin 100 is assembled, as shown in Fig. 4.

[0040] Fig. 6 is a cross-sectional view showing the internal configuration of side plate portion 20a, Fig. 7 is a view of side plate portion 20a viewed in the X1 direction, and Fig. 8 is a view of side plate portion 20b viewed in the X2 direction.

[0041] As shown in Fig. 6, the upper crosspiece 24a and the lower crosspiece 25a extend along the longitudinal direction of the bottom plate 10. The side plate portion 20a is disposed between the upper crosspiece 24a and the lower crosspiece 25a, and includes a plurality of vertical crosspieces 26a extending in a direction perpendicular to the bottom plate 10. The vertical crosspieces 26a are disposed at predetermined intervals in the longitudinal direction of the bottom plate 10. Although not shown, the side plate portion 20b also includes a plurality of vertical crosspieces disposed between the upper crosspiece 24b and the lower crosspiece 25b.

[0042] As shown in Fig. 3, plate member 23a covers the X2 side (outside) of side plate support member 11a. Furthermore, plate member 23b covers the X1 side (outside) of side plate support member 11b. This prevents side plate support members 11a, 11b from being exposed to the outside, improving the design of coffin 100. Furthermore, side plate portion 20a includes a first interlocking bar 27a and a second interlocking bar 28a that are arranged between plate member 23a and side plate support member 11a. Furthermore, side plate portion 20b includes an interlocking bar 27b that is arranged between plate member 23b and side plate support member 11b.

[0043] As shown in Fig. 7, the first intervening crosspiece 27a and the second intervening crosspiece 28a extend along the longitudinal direction of the bottom plate 10. The side plate portion 20a includes a crosspiece 29a disposed between the first intervening crosspiece 27a and the second intervening crosspiece 28a. Although only one crosspiece 29a is shown in Fig. 7, for example, a plurality of crosspieces 29a may be provided at equal intervals in the longitudinal direction of the bottom plate 10.

[0044] As shown in Fig. 8, the spacer 27b extends along the longitudinal direction of the bottom plate 10. The side plate portion 20b includes a spacer 29b disposed between the lower spacer 25b (see Fig. 3) and the spacer 27b. Although only one spacer 29b is shown in Fig. 8, for example, a plurality of spacers 29b may be provided at equal intervals in the longitudinal direction of the bottom plate 10.

[0045] As shown in Fig. 2, hinge 50a is disposed from side panel support member 11a to side panel reinforcing member 21a. A plurality of hinges 50a are provided at equal intervals in the longitudinal direction of bottom panel 10. As shown in Fig. 3, hinge 50b is disposed from side panel support member 11b to side panel reinforcing member 21b. Although not shown, a plurality of hinges 50b are provided at equal intervals in the longitudinal direction of bottom panel 10. Since hinge 50b has the same configuration as hinge 50a, the following describes the configuration of hinge 50a and omits the description of hinge 50b.

[0046] Fig. 9 is a perspective view of a part of the inside of the coffin 100 from the end plate 30a side before the end plate 30a is engaged. As shown in Fig. 9, the hinge 50a includes a blade 51a fixed to the side plate support member 11a, a blade 52a fixed to the side plate reinforcing member 21a, a connection portion 53a connecting the blades 51a and 52a, and a plurality of nails 54a and 55a. Note that, although Fig. 9 shows three nails each for the nails 54a and 55a, the number of nails may be two or less, or four or more.

[0047] As shown in FIG. 3, the nail 54a penetrates the blade 51a and is arranged across the side panel support member 11a, and fixes the blade 51a and the side panel support member 11a. The nail 55a penetrates the blade 52a and is arranged across the side panel reinforcing member 21a, and fixes the blade 52a and the side panel reinforcing member 21a. This allows the side panel reinforcing member 21a to increase the joint strength with the hinge 50a even when the plate member 22a of the side panel portion 20a is thin due to weight reduction. In FIG. 3, the nail 54a is inserted up to the lower crosspiece 25a of the side panel portion 20a, but when the side panel reinforcing member 21a is thick, it may be inserted only into the side panel reinforcing member 21a.

[0048] The hinges 50a and 50b are an example of a fixing member that fixes the side panel reinforcing members 21a and 21b to the side panel support members 11a and 11b in a rotatable manner. The fixing member that fixes the side panel reinforcing members 21a and 21b in a rotatable manner is not limited to the hinges 50a and 50b, and may be any other member that fixes the side panel reinforcing members 21a and 21b to the side panel support members 11a and 11b in a rotatable manner and is made of a flammable material. Another example of the fixing member that fixes the side panel reinforcing members in a rotatable manner may be an adhesive tape made of various resin materials. In this case, the adhesive tape is disposed from the side panel reinforcing members 21a and 21b to the side panel support members 11a and 11b. Even with such a configuration, the side panel reinforcing members 21a and 21b are fixed to the side panel support members 11a and 11b in a rotatable manner.

[0049] 4, the connecting portion 53a bends to rotate the blade 52a relative to the blade 51a toward the inside of the coffin 100. This causes the side plate portion 20a to rotate toward the inside of the coffin 100 relative to the side plate support member 11a.

[0050] Fig. 10 is a view of the end plate portion 30a as viewed in the Y1 direction. As shown in Fig. 10 and Fig. 5, a groove portion 31 extending in the short direction is formed on the bottom plate 10 side edge of the Y2 side surface (inner surface) 32a of the end plate portion 30a. As shown in Fig. 5, the end plate portion 30b also has a groove portion 31 extending in the short direction formed on the bottom plate 10 side edge of the Y1 side surface (inner surface) 32b. As shown in Fig. 5, the groove portion 31 engages with the end plate support members 12a, 12b.

[0051] Fig. 11 is a side view of the side plate portion 20a viewed in the Y2 direction. Fig. 12 is a side view of the side plate portion 20a viewed in the Z2 direction. Fig. 13 is a cross-sectional view of the side plate portion 20a. Fig. 14 is a side view of the end plate portion 30a viewed in the X2 direction. Fig. 15 is a side view of the end plate portion 30a viewed in the Z2 direction. Fig. 16 is a view of the configuration of the fixing member 60 viewed in the Z2 direction.

[0052] As shown in Fig. 16, coffin 100 is equipped with fixing members 60. Fixing members 60 fix end plate portions 30a, 30b to side plate portions 20a, 20b, respectively. Fixing end plate portions 30a, 30b to side plate portions 20a, 20b includes fixing movement of end plate portions 30a, 30b in the Z direction relative to side plate portions 20a, 20b and in the normal direction of end plate portions 30a, 30b, i.e., in the Y direction.

[0053] The fixing member 60 has a side plate fixing member (first member) 61a arranged on the plate members 22a, 22b which form the inner surfaces of the side plate portions 20a, 20b, and an end plate fixing member (second member) 61b arranged on the inner surfaces 32a, 32b of the end plate portions 30a, 30b. Both the side plate fixing member 61a and the end plate fixing member 61b are made of flammable materials such as various resin materials, plastics, and polycarbonate.

[0054] The side plate fixing member 61a and the end plate fixing member 61b are not limited to a specific configuration as long as the end plate fixing member 61b is slid in the Z2 direction (downward) relative to the side plate fixing member 61a to engage with it. As an example, the side plate fixing member 61a has a hook-shaped receiving portion 66 as shown in Figures 9 and 11 to 13, and the end plate fixing member 61b has an insertion portion 69 that is inserted into the receiving portion 66 as shown in Figures 14 and 15.

[0055] The receiving portion 66 and the insertion portion 69 are configured to engage with each other. That is, the receiving portion 66 and the insertion portion 69 are disposed at corresponding positions. As a result, by sliding the end plate side fixing member 61b in the Z2 direction (downward) relative to the side plate side fixing member 61a, the insertion portion 69 is inserted into and engaged with the receiving portion 66. Therefore, the fixing member 60 fixes each of the end plate portions 30a, 30b and the side plate portions 20a, 20b.

[0056] More specifically, as shown in Fig. 9 and Fig. 11 to Fig. 13, the side panel fixing member 61a includes a base 65, a plurality of nails 64, and a receiving portion 66. The base 65 is, for example, a flat member of 60 mm x 15 mm, and has a thickness T2 of, for example, about 5 mm. The base 65 is provided with a nail hole having a diameter of about 5 mm (not shown).

[0057] The receiving portion 66 has a hook shape. Specifically, the receiving portion 66 has a convex portion 661 that protrudes from the base 65, i.e., the plate member 22a, in the X direction (longitudinal direction) perpendicular to the side plate portions 20a and 20b, and its tip is curved in a direction (upward) away from the bottom plate 10. The receiving portion 66 receives and engages the insertion portion 69, which is inserted in the Z2 direction (downward), at the convex portion 661.

[0058] The length L10 (FIG. 12) of the convex portion 661 of the receiving portion 66 is, for example, about 20 mm. The width T3 of the convex portion 661 of the receiving portion 66 in the Y direction (longitudinal direction of the side plate portions 20a, 20b) is, for example, about 5 mm. The length T7 of the convex portion 661 of the receiving portion 66 in the Z direction (height direction) is, for example, about 1 / 30 or less of the length H1 of the side plate portions 20a, 20b in the Z1 direction, for example, 15 mm, when the coffin 100 is one in which a human corpse is placed. As an example, the receiving portion 66 is arranged so that one long side of the base 65 is the base end, as shown in FIG. 12. The convex portion 661 of the receiving portion 66 and the base 65 form a surface S1 perpendicular to the plate member 22a of the side plate portions 20a, 20b.

[0059] As shown in Figs. 11 to 13, the side plate 20a includes a square timber 62. The square timber 62 is a hollow portion inside the side plate 20a sandwiched between the plate members 22a and 23a, and is disposed at the position of a side plate fixing member 61a, which will be described later. Similarly, the square timber 62 is a hollow portion inside the side plate 20b sandwiched between the plate members 22b and 23b, and is disposed at the position of a side plate fixing member 61a, which will be described later. A member 63 is disposed between the plate members 23a, 23b and the square timber 62.

[0060] The nails 64 are disposed across the square timber 62, passing through nail holes in the base 65. This allows the nails 64 to fix the side panel fixing member 61a to the side panel portions 20a and 20b. In addition, since the side panel fixing member 61a is fixed to the square timber 62, the strength of the side panel fixing member 61a can be increased even if the side panel portions 20a and 20b are made lighter. Although two nails 64 are shown in Figs. 9 and 11 to 13, the number of nails 64 may be one or less, or three or more.

[0061] The side plate fixing members 61a are arranged near the inner sides of both sides in the Z direction of the side plate portions 20a, 20b such that the longitudinal direction of the base 65 coincides with the Z direction and the surface S1 faces outward. One or more side plate fixing members 61a are arranged near each of both sides in the Z direction of the side plate portions 20a, 20b. This allows the side plate portions 20a, 20b to be fixed to the end plate portions 30a, 30b by engaging with the end plate fixing members 61b described below.

[0062] Preferably, the side plate fixing members 61a are arranged in a plurality in the Z direction near at least one of both sides in the Z direction of the side plate portions 20a, 20b. More preferably, the side plate fixing members 61a are arranged in a plurality in the height direction near both sides in the Z direction of the side plate portions 20a, 20b. This allows the side plate fixing members 61a to engage with the end plate fixing members 61b described below to suppress rattling of the end plate portions 30a, 30b relative to the side plate portions 20a, 20b.

[0063] As an example, as shown in Figures 7 and 8, two side plate fixing members 61a are arranged on the inside at an interval of length L4 from each of both sides in the Z direction of the side plate portions 20a, 20b. Although Figures 7 and 8 show two side plate fixing members 61a arranged in the Z direction, three or more may be used.

[0064] One of the two side plate fixing members 61a is disposed at a distance of length L5 from the Z-direction side (upper side) of the side plate portions 20a, 20b. Length L5 refers to the length from the upper side of the side plate portions 20a, 20b to the upper surface of the convex portion 661 of the receiving portion 66. The other of the two side plate fixing members 61a is disposed at a distance of length L6 from the Z2-direction side (lower side) of the side plate portions 20a, 20b. Length L6 refers to the length from the lower side of the side plate portions 20a, 20b to the upper surface of the convex portion 661 of the receiving portion 66.

[0065] 14 and 15, the end panel side fixing member 61b includes a base 67, a plurality of nails 68, and an insertion portion 69. The base 67 is, for example, a flat member having a size of 50 mm×15 mm and a thickness of about 5 mm. The base 67 is provided with a nail hole having a diameter of about 5 mm (not shown).

[0066] The insertion portion 69 protrudes in the Y direction (longitudinal direction) from the base 67, i.e., the inner surface 32a of the end plate portion 30a, and forms a sandwiching space 691 between itself and the inner surface 32a, extending in a direction approaching the bottom plate 10. When the insertion portion 69 is inserted into the receiving portion 66 of the side plate side fixing member 61a, the sandwiching space 691 sandwiches the convex portion 661 of the receiving portion 66.

[0067] 14, the insertion portion 69 protrudes from the base 67 with one of the two short sides of the base 67 as a base end, and extends in the longitudinal direction of the base 67 in a direction away from the base 67. The portion of the insertion portion 69 extending in the longitudinal direction of the base 67 forms a sandwiched space 691 between itself and the inner surface 32a. Preferably, the surface of the portion of the insertion portion 69 extending in the longitudinal direction of the base 67 that is farther from the sandwiched space 691 is formed parallel to the base 67.

[0068] The length L11 of the insertion portion 69 in the Y direction perpendicular to the end plate portions 30a, 30b is, for example, about 10 mm. The width T4 of the insertion portion 69 in the X direction is, for example, about 15 mm. The length in the Y direction of the sandwiching space 691 formed by the insertion portion 69, that is, the thickness T5, is, for example, about 5 mm. The length of the portion of the insertion portion 69 extending in the longitudinal direction of the base 67, that is, the length T6 in the Z direction (height direction) of the sandwiching space 691, is, for example, 1 / 20 or less of the length H1 in the Z direction of the side plate portions 20a, 20b when the coffin 100 is for placing a human corpse inside, and is, for example, 20 mm.

[0069] The nails 68 are disposed across the end plate portion 30a, passing through the nail holes of the base 67. In this way, the nails 68 fix the end plate side fixing member 61b and the end plate portion 30a. Although two nails 68 are shown in Fig. 14 and Fig. 15, the number of nails 68 may be one or less, or three or more.

[0070] 10 and 14, the end plate fixing members 61b are arranged near both sides in the Z direction (height direction) of the end plate portions 30a, 30b so that the longitudinal direction of the pedestal 67 coincides with the Z direction. One or more end plate fixing members 61b are arranged near both sides in the Z direction of the end plate portions 30a, 30b. This allows the side plate fixing members 61a to engage with the side plate fixing members 61a and fix the side plate portions 20a, 20b to the end plate portions 30a, 30b.

[0071] Preferably, the end plate fixing members 61b are arranged in a row in the Z direction on at least one of both sides in the Z direction of the end plate portions 30a, 30b. More preferably, the end plate fixing members 61b are arranged in a row in the Z direction on both sides in the Z direction of the end plate portions 30a, 30b. This makes it possible to engage with the side plate fixing members 61a and suppress rattling of the end plate portions 30a, 30b relative to the side plate portions 20a, 20b.

[0072] As an example, as shown in Figures 10 and 14, two end plate fixing members 61b are arranged on each of both sides in the Z direction of the end plate portions 30a, 30b, spaced apart by a length L7. Although Figures 10 and 14 show two end plate fixing members 61b arranged in the Z direction, three or more may be used. In addition, the number of end plate fixing members 61b may or may not match the number of side plate fixing members 61a.

[0073] One of the two end plate side fixing members 61b is disposed at a distance of length L8 from the Z1-direction side (upper side) of the end plate portions 30a, 30b. Length L8 refers to the length from the upper side of the end plate portions 30a, 30b to the sandwiching space 691 of the insertion portion 69. The other of the two end plate side fixing members 61b is disposed at a distance of length L9 from the Z2-direction side (lower side) of the end plate portions 30a, 30b. Length L9 refers to the length from the lower side of the end plate portions 30a, 30b to the farthest point of the sandwiching space 691 of the insertion portion 69.

[0074] The side plate fixing member 61a and the end plate fixing member 61b are disposed at corresponding positions when the end plate portions 30a, 30b are assembled to the side plate portions 20a, 20b, respectively. Specifically, the term "disposed at corresponding positions" refers to the following length relationship. That is, the length L4 between the side plate fixing member 61a and the Z-direction sides of the side plate portions 20a, 20b is equal to the thickness T1 of the end plate portions 30a, 30b (L4=T1). The length L4 and the thickness T1 are, for example, about 25 mm. Therefore, when the side plate fixing member 61a of the side plate portions 20a, 20b is disposed so that the inner surfaces 32a, 32b of the end plate portions 30a, 30b are in contact with the surface S1 of the side plate fixing member 61a of the side plate portions 20a, 20b, respectively, the Y1 side end and the Y2 side end of the side plate portions 20a, 20b are aligned with the outer surfaces of the end plate portions 30a, 30b.

[0075] The length L5 between the receiving portion 66 of the side plate fixing member 61a and the side (upper side) of the side plate portions 20a, 20b facing Z1 is equal to the length L8 between the end plate fixing member 61b and the side (upper side) of the end plate portions 30a, 30b facing Z1 (L5=L8). The lengths L5 and L8 are, for example, about 50 mm when the coffin 100 is intended to place a human corpse inside. Also, the length L6 between the side plate fixing member 61a and the side (lower side) of the side plate portions 20a, 20b facing Z2 is equal to the length L9 between the end plate fixing member 61b and the side (lower side) of the end plate portions 30a, 30b facing Z2 (L6=L9). The lengths L6 and L9 are, for example, about 50 mm when the coffin 100 is intended to place a human corpse inside. As a result, by aligning the side plate portions 20a, 20b in the Z direction and arranging the end plate portions 30a, 30b at the Y1 side ends and Y2 side ends of the side plate portions 20a, 20b, respectively, the Z direction positions of the side plate side fixing member 61a and the end plate side fixing member 61b are aligned.

[0076] The length L7 between the gable plate side fixing member 61b and the Z-direction sides of the gable plate parts 30a and 30b is approximately the same as the thickness T2 of the pedestal 65 of the side plate side fixing member 61a (L7≒T2). The length L7 and the thickness T2 are about 5 mm as an example. The thickness T5 of the clamping space 691 is not less than the width T3 of the receiving part 66 of the side plate side fixing member 61a, and preferably they are approximately the same (T3≒T5). The thickness T5 and the width T3 are about 5 mm as an example. The width T4 of the gable plate side fixing member 61b is not more than the length (L10 - T2) from the pedestal 65 of the convex part 661 of the receiving part 66 of the side plate side fixing member 61a, and preferably they are approximately the same (T4≒L10 - T2). The width T4 and the length from the pedestal 65 of the convex part 661 of the receiving part 66 are about 15 mm as an example. Thereby, when the gable plate parts 30a and 30b are arranged at the Y1-side end and the Y2-side end of the side plate parts 20a and 20b with the Z directions aligned respectively, the convex part 661 of the receiving part 66 of the side plate side fixing member 61a is clamped in the clamping space 691 formed by the insertion part 69 of the gable plate side fixing member 61b.

[0077] Preferably, the length L11 in the Y direction perpendicular to the gable plate parts 30a and 30b of the insertion part 69 is shorter than the length L10 of the convex part 661 of the receiving part 66 (L11 < L10). The length L11 is about 10 mm as an example, and the length L10 is about 15 mm as an example. Thereby, when the gable plate parts 30a and 30b are arranged at the Y1-side end and the Y2-side end of the side plate parts 20a and 20b with the Z directions aligned respectively, and the convex part 661 of the receiving part 66 is clamped in the clamping space 691 of the insertion part 69 of the gable plate side fixing member 61b, as shown in Fig. 16, the insertion part 69 does not protrude inside the side plate parts 20a and 20b in the longitudinal direction more than the receiving part 66.

[0078] Preferably, the length T6 of the sandwiching space 691 in the Z direction (height direction) coincides with the length T7-1 from the surface (upper surface) facing the Z1 direction of the convex portion 661 of the receiving portion 66 of the side plate side fixing member 61a to the end portion (lower end) facing the Z2 direction of the receiving portion 66. As a result, when the convex portion 661 of the receiving portion 66 is sandwiched in the sandwiching space 691 of the insertion portion 69 of the end plate side fixing member 61b, the insertion portion 69 does not protrude in the Z2 direction (downward) from the receiving portion 66, as shown in FIG.

[0079] (How to Assemble a Coffin) Next, a method for assembling coffin 100 according to this embodiment will be described. Figure 17 is a diagram for explaining the fixing method using fixing members 60, where (A) shows the state before fixing and (B) shows the fixed state. Figure 18 is a diagram for explaining a method for positioning end plate portions 30a, 30b from a state in which side plate portions 20a, 20b are raised when coffin 100 is being assembled.

[0080] Since the side plate side fixing member 61a and the end plate side fixing member 61b of the fixing member 60 have the above-mentioned configuration, the fixing member 60 is fixed by the method shown in Fig. 17. In detail, when engaging the side plate side fixing member 61a and the end plate side fixing member 61b of the fixing member 60, first, the end plate side fixing member 61b is arranged in the Z1 direction (upward) of the side plate side fixing member 61a (Fig. 17(A)). At this time, the end plate side fixing member 61b is arranged so that the tip of the insertion portion 69 is above the convex portion 661 of the receiving portion 66. This prevents the insertion portion 69 of the end plate side fixing member 61b from interfering with the convex portion 661 of the receiving portion 66.

[0081] Next, the end panel fixing member 61b is slid in the Z2 direction (downward) (FIG. 17(B)). As a result, the convex portion 661 of the receiving portion 66 is sandwiched in the sandwiching space 691 formed by the insertion portion 69 of the end panel fixing member 61b, and the side panel fixing member 61a and the end panel fixing member 61b are engaged with each other.

[0082] The fixing member 60 is fixed in the manner shown in Fig. 17, and the coffin 100 is assembled in the manner shown in Fig. 18. In detail, first, as shown in Fig. 4, the bottom plate 10 and the side plate portions 20a and 20b fixed to the bottom plate 10 and in a folded state are prepared. Then, the side plate portions 20a and 20b are each raised in a vertical direction relative to the bottom plate 10 (ST1). At this time, the lower crosspiece 25a, the first intervening crosspiece 27a, and the second intervening crosspiece 28a come into contact with the side plate support member 11a, so that the side plate portion 20a does not fall outward from the vertical direction. Also, the lower crosspiece 25b and the intervening crosspiece 27b come into contact with the side plate support member 11b, so that the side plate portion 20b does not fall outward from the vertical direction.

[0083] Next, the end plate portions 30a, 30b are arranged at the ends of both longitudinal sides of the side plate portions 20a, 20b (ST2). At this time, as shown in FIG. 17(A), the end plate portions 30a, 30b are arranged with the inner surfaces 32a, 32b abutting the surface S1 of the side plate side fixing member 61a. Also, the end plate portions 30a, 30b are arranged so that their upper surfaces (ends facing Z1) are located at a position of length H2 above (in the Z1 direction) the upper surfaces of the side plate portions 20a, 20b. The four side plate side fixing members 61a and the end plate side fixing members 61b are all arranged at corresponding positions, so that the end plate side fixing members 61b are located directly above (in the Z1 direction) the side plate side fixing members 61a, as shown in FIG. 17(A).

[0084] Next, the end plate portions 30a, 30b are each slid downward (toward Z2) by a length H2 (ST3). At this time, the four side plate fixing members 61a and the end plate fixing members 61b are engaged with the convex portions 661 of the receiving portions 66 sandwiched in the sandwiching spaces 691 formed by the insertion portions 69 of the end plate fixing members 61b, as shown in Fig. 17(B). At this time, the end plate portions 30a, 30b reach the bottom of the bottom plate 10. Therefore, the end plate portions 30a, 30b are aligned with the ends of the bottom plate 10 and the side plate portions 20a, 20b on both sides in the longitudinal direction, respectively.

[0085] Thereafter, the cover plate 40 is placed on the end plates 30a, 30b and the side plates 20a, 20b, thereby completing the assembly of the coffin 100.

[0086] According to the above configuration, the coffin 100 can be delivered to the user in a folded state with the side plate portions 20a, 20b and the end plate portions 30a, 30b detached from the side plate portions 20a, 20b. This reduces the space required in the user's facility to store the coffin 100, thereby reducing storage costs. In addition, the cost of transporting the coffin 100 can be reduced. When using the coffin 100, the user can easily assemble the coffin 100 without metal fittings or nails through a simplified work process in which the folded side plate portions 20a, 20b are raised against the bottom plate 10, the end plate portions 30a, 30b are attached to the inner surfaces of the side plate portions 20a, 20b, and the cover plate 40 is placed on the side plate portions 20a, 20b and the end plate portions 30a, 30b. This allows the coffin 100 to be easily assembled with a small number of people, such as one worker. In other words, easy and smooth assembly can be achieved.

[0087] When attaching the end plates 30a, 30b to the inner surfaces of the side plates 20a, 20b, the user lifts the end plates 30a, 30b by a length H2 relative to the side plates 20a, 20b, places them on the inner surfaces of the side plates 20a, 20b, and slides them downward from that position by a length H2. The length H2, which is the height to which the end plates 30a, 30b are lifted, is the length at which the tip of the insertion portion 69 of the end plate side fixing member 61b is above the convex portion 661 of the receiving portion 66, as shown in Fig. 17(A), and may be equal to or greater than the length T6 of the sandwiching space 691 and the height direction length T7 of the convex portion 661 of the receiving portion 66. As described above, when the coffin 100 is for placing a human corpse inside, the length T6 of the sandwiching space 691 is about 1 / 20 or less of the length H1 in the height direction of the side plates 20a, 20b, and the length T7 of the convex portion 661 of the receiving portion 66 is about 1 / 30 or less of the length H1. Therefore, when attaching the end plates 30a, 30b to the inner surfaces of the side plates 20a, 20b, the height to which the user lifts the end plates 30a, 30b relative to the side plates 20a, 20b may be about (1 / 20+1 / 30) of the length H1 in the height direction of the side plates 20a, 20b.

[0088] In contrast, as a comparative example, a configuration is considered in which grooves are formed on the inside of both longitudinal ends of the side plate portions 20a, 20b, and the side surfaces of the end plate portions 30a, 30b on the side plate portions 20a, 20b side are fitted into the grooves to attach the end plate portions 30a, 30b to the inner surfaces of the side plate portions 20a, 20b. In this case, the height to which the user lifts the end plate portions 30a, 30b relative to the side plate portions 20a, 20b is the length H1 in the height direction of the side plate portions 20a, 20b. Therefore, by providing the fixing member 60, the height to which the end plate portions 30a, 30b are lifted relative to the side plate portions 20a, 20b can be significantly reduced compared to the comparative example. As a result, the assembly of the coffin 100 can be made easier and smoother than the configuration of the comparative example. In addition, the space in the user's facility that needs to be secured for assembling the coffin 100 can be further reduced.

[0089] [Variation 1] The present invention is not limited to the above embodiment, and various modifications are possible. As described above, the side plate fixing member 61a and the end plate fixing member 61b are not limited to a specific configuration as long as the end plate fixing member 61b is slid in the Z2 direction (downward) relative to the side plate fixing member 61a to engage with each other. Therefore, the above-described embodiment in which the side plate fixing member 61a has a hook-shaped receiving portion 66 and the end plate fixing member 61b has an insertion portion 69 inserted into the receiving portion 66 is one example. As one modified example, the end plate fixing member 61b may have a hook-shaped receiving portion 66 and the side plate fixing member 61a may have an insertion portion 69 inserted into the receiving portion 66, contrary to the above description. In this case, the insertion portion 69 protrudes from the inner surface of the plate members 22a, 22b of the side plate portions 20a, 20b in the orthogonal X direction (longitudinal direction), forms a sandwiching space 691 for sandwiching the convex portion 661 of the receiving portion 66 between the inner surfaces of the plate members 22a, 22b, and extends in a direction perpendicular to the bottom plate 10 and away from the bottom plate 10. The receiving portion 66 protrudes from the inner surface 32a of the end plate portion 30a in the Y direction (longitudinal direction), and has a hook-shaped shape whose tip is curved in the direction in which the insertion portion 69 is inserted, that is, in the direction approaching the bottom plate 10 (downward). Even in the case of the coffin 100 according to this modification, as in the above description, the end plate side fixing member 61b is slid in the Z2 direction (downward) relative to the side plate side fixing member 61a to engage with it, and the coffin 100 can be easily assembled.

[0090] [Variation 2] In the above embodiment, the side plate portions 20a, 20b are attached to the bottom plate 10 in a foldable manner, and the end plate portions 30a, 30b are fixed to the side plate portions 20a, 20b by the fixing members 60. As a modified example, the end plate portions 30a, 30b may be attached to the bottom plate 10 in a foldable manner, and the side plate portions 20a, 20b may be fixed to the end plate portions 30a, 30b by the fixing members 60. This modified example is realized by rotating the description of the above embodiment by 90 degrees in a plan view. That is, this modified example is obtained by replacing the side plate portions 20a, 20b and the end plate portions 30a, 30b in the description of the above embodiment. Therefore, in the case of the coffin 100 according to this modified example, the end plate portions 30a, 30b are raised relative to the bottom plate 10, and the side plate portions 20a, 20b are slid downward (toward Z2) by a length H2 to be assembled. In this case, too, by providing the fixing members 60, the height to which the side plate portions 20a, 20b are raised relative to the end plate portions 30a, 30b can be made significantly smaller than in the above-mentioned comparative example. As a result, the assembly of the coffin 100 can be made easier and smoother than in the configuration of the comparative example. In addition, the space within the user's facility that needs to be secured for assembling the coffin 100 can be further reduced.

[0091] [Variation 3] Fig. 19 is a view of the end plate fixing member 61b according to the third modified example viewed in the X2 direction. As shown in Fig. 19, the insertion portion 69 of the end plate fixing member 61b may have a protrusion 692 at the tip extending from the inner surface 32a of the end plate portion 30a toward the sandwiched space 691 between the inner surface 32a.

[0092] In the fixing member 60 of the third modified example, similar to the fixing method shown in Figure 17, the end plate portions 30a, 30b are positioned in the Z1 direction (upward) of the side plate fixing member 61a with their inner surfaces 32a, 32b abutting against the faces S1 of the side plate portions 20a, 20b, and are then slid in the Z2 direction (downward), whereby the side plate fixing member 61a and the end plate fixing member 61b engage with each other.

[0093] The sandwiching space 691 of the end plate fixing member 61b according to the third modified example is narrowed at the protrusion 692. Therefore, the fixing method according to the third modified example may be such that the end plate fixing member 61b is placed slightly in the X1 direction rather than the Z1 direction (upward) of the side plate fixing member 61a, and when sliding in the Z2 direction (downward), the end plate fixing member 61b is slid slightly in the X2 direction, that is, diagonally downward. Alternatively, the fixing method according to the third modified example may be such that when the end plate parts 30a, 30b are slid in the Z2 direction (downward) from a state in which the inner surfaces 32a, 32b are abutted against the surfaces S1 of the side plate parts 20a, 20b and arranged in the Z1 direction (upward) of the side plate fixing member 61a, the end plate fixing member 61b is made of wood, various resin materials, plastic, polycarbonate, or the like, and the sandwiching space 691 of the protrusion 692 is expanded.

[0094] FIG. 20 is a diagram for explaining the fixed state of the fixing member 60 according to the third modification. In FIG. 20, for the purpose of explanation, the upwardly curved tip of the convex portion 661 of the receiving portion 66 is shown by a dotted line. In the fixing member 60 according to the third modification, the protrusion 692 of the insertion portion 69 of the end plate side fixing member 61b functions as a barb. That is, the protrusion 692 fixes the movement of the insertion portion 69 in the Z1 direction (upward) when the convex portion 661 of the receiving portion 66 is sandwiched in the sandwiching space 691. As a result, when the side plate side fixing member 61a and the end plate side fixing member 61b are engaged with each other, the movement of the insertion portion 69 in the Z2 direction (downward) is fixed by the convex portion 661 of the receiving portion 66, and the movement in the Z1 direction (upward) is also fixed by the protrusion 692. [Explanation of symbols]

[0095] 10: bottom plate, 20a, 20b: side plate portions, 30a, 30b: end plate portions, 40: cover plate, 50a, 50b: hinges, 51a, 52a: wings, 60: fixing member, 61a: side plate side fixing member (first member), 61b: end plate side fixing member (second member), 66: receiving portion, 69: insert portion, 100: coffin, 691: clamping space (space between surface)

Claims

1. A prefabricated coffin without metal fittings or nails, all of whose components are made of combustible materials, The bottom plate and A pair of side plate portions; A pair of end panels; Fixing members made of a combustible material that fix each of the pair of end plate portions and the pair of side plate portions; a cover plate disposed on the pair of side plate portions and the pair of end plate portions, One plate portion of the pair of side plate portions and the pair of end plate portions is attached to the bottom plate, and the other plate portion is disposed perpendicular to the one plate portion in a plan view, The fixing member has a first member arranged on the inner surface side of the coffin when attached to the bottom plate of the one plate portion, and a second member arranged on a surface that becomes the inner surface side of the coffin when assembled to the one plate portion of the other plate portion, one of the first member and the second member includes an insertion portion having a shape protruding from the inner surface side and being inserted into the other member, the other member includes a receiving portion having a shape protruding from the inner surface side and receiving the insertion portion, The fixing member is configured so that the insertion portion and the receiving portion are engaged with each other. A prefabricated coffin without metal fittings or nails.

2. Fixing the pair of end plate portions and the pair of side plate portions includes fixing the movement of the other plate portion relative to the one plate portion in at least a direction approaching the bottom plate among directions perpendicular to the bottom plate, and in a normal direction of the other plate portion. The metal fittings and nailless prefabricated coffin according to claim 1.

3. At least two of the first members are arranged on the inner surface side of each of the one plate portions in a direction perpendicular to the bottom plate, The second members are disposed on the surface of the other plate portion at positions corresponding to the first members when the second plate portion is attached to the one plate portion. The metal fittings and nail-free prefabricated coffin according to claim 2.

4. The insertion portion protrudes from the inner surface side where it is disposed, and has a shape that forms a sandwiching space for sandwiching the receiving portion between the insertion portion and the inner surface side and extends in a direction perpendicular to the bottom plate. The metal fittings and nailless prefabricated coffin according to claim 1.

5. The receiving portion protrudes from the inner surface side where the receiving portion is disposed, and has a hook shape oriented in such a way that the inserting portion is inserted. The metal fittings and nailless prefabricated coffin according to claim 1.

6. The length of the insertion portion and the receiving portion in a direction perpendicular to the bottom plate is shorter than the length of the one plate portion attached to the bottom plate in a direction perpendicular to the bottom plate. The metal fittings and nailless prefabricated coffin according to claim 1.

7. The base plate further includes a pair of first support members disposed on a portion of an edge portion of the base plate, The one plate portion is fixed to each of the pair of first support members via a fixing member that rotatably fixes the one plate portion, and each of the one plate portions is configured to be foldable inward by the fixing member that rotatably fixes the one plate portion, The fixing member for rotatably fixing the same is made of a flammable material. The metal fittings and nailless prefabricated coffin according to claim 1.

8. The fixing member for rotatably fixing is a hinge, The one plate portion is With piers, Two plate members sandwiching the crosspiece from both sides; a reinforcing member fixed to a surface of the inner plate member of the two plate members or to the crosspiece; The hinge is A first blade fixed to the first support member; A second blade fixed to the reinforcing member; a connection portion between the first blade and the second blade, the connection portion causing the second blade to rotate relative to the first blade. The metal fittings and nail-free prefabricated coffin according to claim 7.

9. A second support member is arranged at a position facing any one of the other plate portions in an edge portion of the bottom plate, The length of the second support member in a direction perpendicular to the bottom plate is smaller than the length of the first support member in a direction perpendicular to the bottom plate. The metal fittings and nail-free prefabricated coffin according to claim 7.

10. The one plate portion is the pair of side plate portions, and the other plate portion is the pair of end plate portions. The metal fittings and nailless prefabricated coffin according to claim 1.

11. The one member is the second member, and the other member is the first member. The metal fittings and nailless prefabricated coffin according to claim 1.

Images