Exterior wall materials and exterior walls of structures constructed using them

Abstract

For example, the present invention provides a wooden exterior wall material that enables the maintenance of airtightness at the joints (seams) of adjacent exterior wall materials without the need to use moisture-curing or drying-curing sealants, even when temperature or humidity differences occur between the inside and outside of a structure such as a sauna. [Solution] The exterior wall material 2 is a long wooden member in the longitudinal direction that constructs the peripheral wall 3 that separates the inside and outside of the barrel-shaped sauna device 1. A first protrusion 2a extending in the longitudinal direction is formed on one end face in the short direction of the exterior wall material 2, and a first groove 2b extending in the longitudinal direction is formed outside the first protrusion 2a. Furthermore, a second groove 2c extending in the longitudinal direction is formed on the other end face in the short direction of the exterior wall material 2, and a second protrusion 2d extending in the longitudinal direction is formed outside the second groove 2c. There is a clearance between the second groove 2c and the first protrusion 2a such that the first protrusion 2a can be tilted within the second groove 2c. ru.

Description

Technical Field

[0001] The present invention relates to an exterior wall material and an exterior wall of a structure constructed using the same. More specifically, the present invention relates to a wooden exterior wall material and a sauna device constructed using the same, particularly to an exterior wall of a structure such as a barrel (barrel-shaped) sauna device.

Background Art

[0002] Conventionally, as this type of sauna device, for example, those disclosed in Patent Document 1 etc. are known (sauna room). In the following description, the reference signs used in Patent Document 1 are shown in parentheses for reference, but they do not correspond to the reference signs in the embodiments of the present invention.

[0003] In the sauna room (100) disclosed in Patent Document 1, the floor panel (111), which is an exterior wall material that is long in the longitudinal direction (front-to-back direction), has longitudinally extending notched recesses (13) formed on both the left and right end faces (joint portions) in the short direction. Similarly, the side panel (112), which is an exterior wall material that is long in the longitudinal direction, has longitudinally extending protruding portions (14) formed on the lower end face (joint portion) in the short direction, and longitudinally extending notched recesses (13) formed on the upper end face (joint portion) in the short direction. Similarly, the top panel (113), which is an exterior wall material that is long in the longitudinal direction, has longitudinally extending notched portions (15) formed on both the left and right end faces (joint portions) in the short direction. Furthermore, on the lower end face (joint portion) in the short direction of the upper side panel (114), which is also an exterior wall material that is long in the longitudinal direction, a projection (14) extending in the longitudinal direction is formed, and on the upper end face (joint portion) in the short direction, a notch (15) extending in the longitudinal direction is formed. Then, for example, by fitting the projection (14) of one adjacent exterior wall material into the notched recess (13) of the other exterior wall material, multiple exterior wall materials are joined together in sequence (joined), thereby constructing the cylindrical peripheral wall (110) of the sauna room (100). In addition, the front and rear of the cylindrical peripheral wall (110) are closed by fitting the front wall (120) and rear wall (130), which are formed to match the shape of the inner circumference of the peripheral wall (110) (see Figures 1 and 2 of Patent Document 1 for the above).

[0004] Furthermore, in the sauna apparatus (sauna room (100)) disclosed in Patent Document 1, the joints (seams) of adjacent exterior wall materials are bonded together using moisture-curing or drying-curing caulking materials as bonding agents. In this case, the caulking material is filled without any gaps in the joints (seams), thereby improving the adhesion (airtightness) of the joints (seams). [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2024-158161 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] In the sauna apparatus (sauna room) disclosed in Patent Document 1, lightweight panels made of EPS (expanded polystyrene) are used as the exterior wall material. However, in order to exert depressive and stress-relieving effects and relaxation effects, it is desirable to use wooden materials such as cypress as the exterior wall material. However, if wooden materials are used for the exterior walls, there is a risk that the exterior wall material will expand and contract when there is a temperature or humidity difference between the inside and outside of the sauna device, causing gaps to form at the joints. Therefore, if the sauna device continues to be used as is, the airtightness of the joints between adjacent exterior wall materials will decrease, allowing air to flow from the outside to the inside and heat to escape from the inside to the outside (reducing insulation), which may make it impossible to maintain the temperature inside. As a result, there is a possibility that large-scale repairs will be required at regular intervals. Furthermore, in the sauna device (sauna room) disclosed in Patent Document 1, moisture-curing type sealant or dry-curing type sealant is used to fill the gaps in the joints (seams) of adjacent exterior wall materials to improve the airtightness of the joints (seams). However, if this is directly applied, there is a problem that the sealing work will take a long time, making it difficult to assemble the sauna device. In addition, if moisture-curing type sealant or the like is used to fill the joints (seams) of adjacent exterior wall materials, it will be difficult to disassemble the sauna device and reassemble it in another location (relocation of the sauna device).

[0007] The present invention has been made to solve the aforementioned problems in the prior art, and aims to provide a wooden exterior wall material and a sauna device constructed using the same, particularly an exterior wall of a structure such as a barrel sauna device, that can maintain airtightness at the joints (seams) of adjacent exterior wall materials without using moisture-curing or drying-curing sealants, even when temperature and humidity differences occur between the inside and outside of the structure, such as a sauna device. [Means for solving the problem]

[0008] To achieve the above objective, the structure of the exterior wall material according to the present invention is as follows: (1) A long wooden exterior wall material that is used to construct an exterior wall separating the interior and exterior of a structure, A first protrusion extending in the longitudinal direction is formed on one end face in the short direction of the exterior wall material, and a first groove extending in the longitudinal direction is formed outside the first protrusion. A second groove extending in the longitudinal direction is formed on the other end face in the short direction of the exterior wall material, and a second protrusion extending in the longitudinal direction is formed outside the second groove. And, A clearance is ensured between the second groove and the first protrusion such that the first protrusion can be tilted within the second groove. It is characterized by the following.

[0009] In the present invention, structures include, for example, houses, sheds, warehouses, log houses, box-type sauna devices, and barrel-type sauna devices. Furthermore, materials such as cypress, red cedar, cedar, and pine can be used for the exterior walls.

[0010] The above configuration (1) of the exterior wall material of the present invention provides the following effects. In other words, according to the configuration of the exterior wall material of the present invention as described in (1) above, when two adjacent exterior wall materials are joined together, the second protrusion and the first recessed groove into which the second protrusion is inserted exist outside the second recessed groove into which the first protrusion is inserted at the joint (seam portion) (there exists another set of irregularities (the first recessed groove and the second protrusion inserted into the first recessed groove) outside the irregularities of the joint (seam portion) (the second recessed groove and the first protrusion inserted into the second recessed groove), making it possible to improve the airtightness of the joint (seam portion) of two adjacent exterior wall materials. More specifically, even if the two adjacent exterior wall materials separate due to shrinkage (contraction) of the exterior wall material, the double set of irregularities at the joint (seam portion) makes it possible to suppress the airflow through the joint (seam portion). 。 Furthermore, it becomes possible to tilt one adjacent exterior wall material relative to the other. By sequentially joining (joining together) multiple exterior wall materials while tilting one adjacent exterior wall material relative to the other in this way, it becomes possible to construct a cylindrical peripheral wall in, for example, a barrel-shaped sauna device. Therefore, according to the above configuration (1) of the exterior wall material of the present invention, it is possible to provide a wooden exterior wall material that can maintain airtightness at the joints (seams) of adjacent exterior wall materials without using moisture-curing caulking materials or drying-curing caulking materials, even when temperature differences or humidity differences occur between the inside and outside of a structure.

[0011] In the above configuration (1) of the exterior wall material of the present invention, the following (2 )of Such a configuration is preferable.

[0013] According to the preferred configuration of (2) above, it is possible to tilt one adjacent exterior wall material relative to the other exterior wall material. By sequentially joining (joining together) multiple exterior wall materials while tilting one adjacent exterior wall material relative to the other in this manner, it becomes possible to construct a cylindrical peripheral wall in, for example, a barrel-shaped sauna device.

[0014] (2) the above (1)In the configuration, the end face shape of the first concave groove is substantially semi-elliptical, and the end face shape of the second convex strip is substantially semi-elliptical which is substantially equal to the end face shape of the first concave groove.

[0015] The above (2) According to the preferred configuration, it is possible to tilt one outer wall member with respect to the other outer wall member in a state where the first concave groove is substantially in close contact with the second convex strip. As a result, for example, it is possible to construct the cylindrical peripheral wall while ensuring the airtightness of the joint portion (seam portion) of the adjacent outer wall members of the cylindrical peripheral wall in a barrel (barrel-shaped) sauna device or the like.

[0016] Further, the configuration of the outer wall of the structure according to the present invention is (3) The above (1 ) or (2) It is characterized in that it is constructed using an outer wall member having any of the configurations.

[0017] The above (3) According to the configuration of the outer wall of the structure of the present invention, since it is constructed using an outer wall member having any of the above (1 ) or (2) configurations, even when there is a temperature difference or humidity difference between the inside and outside of the structure, it is possible to provide an outer wall of the structure that can maintain the airtightness of the joint portion (seam portion) of the adjacent outer wall members without using a moisture-curing type caulking material or a dry-curing type caulking material or the like. And this will contribute to improving the heat insulation performance of structures such as sauna devices. That is, even if the sauna device or the like is continuously used for a long time, the airtightness of the joint portion (seam portion) of the adjacent outer wall members will not decrease, and air will not flow in from the outside to the inside or heat will not escape from the inside to the outside (the heat insulation property will not decrease), and as a result, large-scale repairs at regular intervals will not be necessary.

[0018] In addition, since it is not necessary to use a moisture-curing type caulking material, a dry-curing type caulking material, etc. (it is not necessary to fill a moisture-curing type caulking material, a dry-curing type caulking material, etc. in the joint (seam portion) of adjacent outer wall materials), it becomes possible to improve the assembly workability of structures such as sauna devices. And thus, since a moisture-curing type caulking material, etc. is not filled in the joint (seam portion) of adjacent outer wall materials, for example, it becomes possible to easily perform the work of disassembling a sauna device and reassembling it at another location (relocation work of the sauna device).

[0019] In the above (3) configuration of the outer wall of the structure of the present invention, the following (4) , (5) configuration is preferably adopted.

[0020] (4) In the above (3) configuration, the structure is a sauna device.

[0021] (5) In the above (4) configuration, the sauna device is a barrel (barrel-shaped) sauna device.

Effects of the Invention

[0022] According to the present invention, for example, even when a temperature difference or a humidity difference occurs between the inside and the outside of a structure such as a sauna device, it is possible to maintain the airtightness of the joint (seam portion) of adjacent outer wall materials without using a moisture-curing type caulking material, a dry-curing type caulking material, etc., and a wooden outer wall material and a sauna device constructed using the same, particularly, an outer wall of a structure such as a barrel (barrel-shaped) sauna device can be provided.

Brief Description of the Drawings

[0023] [Figure 1] FIG. 1 is a perspective view showing an external configuration of a barrel (barrel-shaped) sauna device constructed using an outer wall material in an embodiment of the present invention. [Figure 2] Figure 2 is a perspective view showing the configuration of a single exterior wall material in one embodiment of the present invention. [Figure 3] Figure 3 is a perspective view showing two adjacent exterior wall materials joined together in one embodiment of the present invention. [Figure 4] Figure 4 is an end view showing the configuration of an exterior wall material in one embodiment of the present invention, where (a) shows the state before joining (joining) the two upper and lower exterior wall materials, (b) shows the state after joining (joining) the two upper and lower exterior wall materials, and (c) shows the state in which one of the (upper) exterior wall materials is tilted by a predetermined angle θ from the state in (b). [Figure 5] Figure 5 is an end view illustrating the end face shape of the exterior wall material in one embodiment of the present invention. [Figure 6] Figure 6 is an end view showing a modified example (other configuration) of the exterior wall material in one embodiment of the present invention, where (a) is a minor modification of the exterior wall material shown in Figure 4(a), and (b) is the exterior wall material of (a) with the rounded edges removed and the corners made right angles. [Figure 7] Figure 7 is an end view showing the exterior wall material shown in Figure 6 joined (sewn together) in two sections, with (a) corresponding to Figure 6(a) and (b) corresponding to Figure 6(b). [Modes for carrying out the invention]

[0024] The present invention will be described in more detail below using preferred embodiments. However, the embodiments described below are merely examples of the present invention, and the present invention is not limited thereto.

[0025] [Configuration of a barrel-shaped sauna system] First, the configuration of a barrel-shaped sauna device, which is a structure constructed using the exterior wall material in one embodiment of the present invention, will be explained with reference to Figure 1.

[0026] Figure 1 is a perspective view showing the external configuration of a barrel-shaped sauna device constructed using an exterior wall material according to one embodiment of the present invention.

[0027] As shown in Figure 1, the barrel sauna device 1 of this embodiment has cylindrical perimeter walls 3 arranged in the front-to-back direction with the axial direction oriented transversely. The perimeter walls 3 are constructed by sequentially joining (joining together) long wooden outer wall materials 2 in the longitudinal direction (front-to-back direction) in the short direction. The front and rear of the cylindrical perimeter walls 3 are closed by fitting in a front wall 4 and a rear wall (not shown) formed to match the shape of the inner circumference of the perimeter walls 3. The front wall 4 is provided with a hinged door 5 for people to enter and exit, and on both the left and right sides of the hinged door 5 are provided with skylights 6 to let in sunlight. Furthermore, a cylindrical space is provided at the front of the sauna device 1. Within this space, a wooden slatted mat 7 is laid directly in front of the hinged door 5, and wooden chairs 8 are fixed to both the left and right sides of the slatted mat 7. Furthermore, the interior of the barrel-shaped sauna device 1 is fitted with wooden benches, a stove, and other items.

[0028] The barrel-shaped sauna device 1 is positioned on three bases 9 that conform to the shape of the surrounding wall 3, allowing for stable installation, and is installed outdoors or in other locations. In Figure 1, reference numeral 10 indicates a stainless steel "band" wrapped around the outside of the surrounding wall 3 to fasten each of the exterior wall materials 2. Reference numeral 11 indicates "asphalt roofing," a type of waterproofing material installed to prevent water leakage.

[0029] [Composition of exterior wall materials] Next, the configuration of the exterior wall material 2 that makes up the peripheral wall (outer wall) 3 of the barrel sauna device (structure) 1 in this embodiment will be explained with reference to Figures 2 to 5.

[0030] Figure 2 is a perspective view showing the configuration of a single exterior wall material in this embodiment, Figure 3 is a perspective view showing the state in which two adjacent exterior wall materials are joined (spun together), Figure 4 is an end view showing the configuration of the exterior wall material, where (a) is a diagram showing the state before the upper and lower two exterior wall materials are joined (spun together), (b) is a diagram showing the state in which the upper and lower two exterior wall materials are joined (spun together), (c) is a diagram showing the state in which one of the (upper) exterior wall materials is tilted by a predetermined angle θ from the state in (b), and Figure 5 is an end view for explaining the end face shape of the exterior wall material.

[0031] As shown in Figures 1 and 2, the exterior wall material 2 of this embodiment is a roughly rectangular, plate-shaped wooden member that is long in the longitudinal direction (front-to-back direction) and forms a peripheral wall (exterior wall) 3 that separates the inside and outside of the barrel sauna device 1, which is a structure. It has a certain thickness so that the first protrusion 2a and the first recess 2b, and the second recess 2c and the second protrusion 2d, which will be described later, can be formed on one end face and the other end face in the short direction, respectively. For the exterior wall material 2, for example, cypress, red cedar, cedar, pine, etc., can be used.

[0032] As shown in Figure 2, a first protrusion 2a with a substantially rectangular cross-section extending in the longitudinal direction is formed on one end face in the short direction of the exterior wall material 2, and a first groove 2b extending in the longitudinal direction is formed outside the first protrusion 2a. On the other end face in the short direction of the exterior wall material 2, a second groove 2c with a substantially rectangular cross-section extending in the longitudinal direction is formed, and a second protrusion 2d extending in the longitudinal direction is formed outside the second groove 2c. The sizes of the first protrusion 2a and the second groove 2c, and the shapes of the first groove 2b and the second protrusion 2d will be described later.

[0033] The configuration of the exterior wall material 2 produces the following effects. In other words, with this configuration of the exterior wall material 2, as shown in Figures 3, 4(a), and 4(b), when two adjacent exterior wall materials 2 are joined (sewn together), the second protrusion 2d and the first recessed groove 2b into which the second protrusion 2d is inserted are located outside the second recessed groove 2c into which the first protrusion 2a is inserted at the joint portion 12 (because there are further protrusions (the first recessed groove 2b and the second protrusion 2d inserted into the first recessed groove 2b) on the outside of the protrusions (the second recessed groove 2c and the first protrusion 2a inserted into the second recessed groove 2c) of the joint portion 12), it is possible to improve the airtightness of the joint portion 12 of the two adjacent exterior wall materials 2. More specifically, even if two adjacent exterior wall materials 2 separate due to shrinkage (contraction) of the exterior wall material 2, the unevenness of the joint (seam portion) 12 is doubled, which makes it possible to suppress the airflow through the joint (seam portion) 12. Therefore, with this configuration of the exterior wall material 2, even if there is a temperature difference or humidity difference between the inside and outside of the barrel sauna device 1, which is a structure, it is possible to provide a wooden exterior wall material that can maintain the airtightness of the joints (seams) 12 of adjacent exterior wall materials 2 without using moisture-curing sealants or dry-curing sealants.

[0034] This will contribute to improving the thermal insulation performance of the barrel-shaped sauna device 1. In other words, even if the barrel-shaped sauna device 1 is used for a long period of time, the airtightness of the joints (seams) 12 of the adjacent exterior wall materials 2 will not decrease, preventing air from flowing in from the outside to the inside or heat from escaping from the inside to the outside (resulting in reduced insulation). As a result, large-scale repairs will not be required at regular intervals.

[0035] As shown in Figure 5, the end face size of the first protrusion 2a is set to be smaller than the end face size of the second groove 2c. Since the longitudinal length of the first protrusion 2a is the same as the longitudinal length of the second groove 2c, the size of the first protrusion 2a is ultimately set to be smaller than the size of the second groove 2c. Specifically, the end face size of the first protrusion 2a is approximately 8.6 mm × 9.5 mm, and the end face size of the second groove 2c is approximately 11.5 mm × 10.5 mm. The length of the exterior wall material 2 in the short direction is approximately 90 mm (not shown), and the thickness is approximately 40 mm. The length of the first groove 2b and the second protrusion 2d in the thickness direction is approximately 30.6 mm. As a result, as shown in Figures 3 and 4, a clearance (gap) is secured between the second groove 2c and the first protrusion 2a that is sufficient to allow the first protrusion 2a to be tilted within the second groove 2c.

[0036] With this configuration, it becomes possible to tilt one adjacent exterior wall material 2 relative to the other exterior wall material 2. Then, by sequentially joining (joining together) multiple exterior wall materials 2 while tilting one adjacent exterior wall material 2 relative to the other exterior wall material 2 in this way, it becomes possible to construct the cylindrical peripheral wall 3 of the barrel sauna device 1.

[0037] As shown in Figure 5, the end face shape of the first groove 2b is approximately semi-elliptical (see the lower dashed elliptical section E in Figure 5), and the end face shape of the second protrusion 2d is also approximately semi-elliptical, almost identical to the end face shape of the first groove 2b (see the upper dashed elliptical section F in Figure 5).

[0038] With this configuration, as shown in Figures 4(b) and 4(c), it becomes possible to tilt one outer wall material 2 relative to the other outer wall material 2 while the first recessed groove 2b is in close contact with the second protruding ridge 2d. As a result, it becomes possible to construct the cylindrical perimeter wall 3 of the barrel sauna device 1 while ensuring airtightness at the joints (seams) 12 of adjacent outer wall materials 2.

[0039] As shown in Figure 4(c), the inclination angle θ of one exterior wall material 2 relative to the other exterior wall material 2 varies depending on the size of the surrounding wall 3 to be constructed and the size and number of exterior wall materials 2 used. As shown in Figure 5, the distance in the short direction between the bottom surface of the first groove 2b and the apex of the shoulder portion 2B of the first groove is approximately 6.94 mm, and the distance in the short direction between the top surface of the second protrusion 2d and the apex of the shoulder portion 2D of the second protrusion is approximately 8.94 mm. In the state shown in Figure 4(b), where the two upper and lower exterior wall materials 2 are simply joined together, the distance between the apex of the shoulder portion 2B of the first groove and the apex of the shoulder portion 2D of the second protrusion is approximately 2 mm. In this embodiment, the inclination angle θ of one exterior wall material 2 relative to the other exterior wall material 2 is defined as the inclination angle when, as shown in Figures 4(b) and (c), the first recessed groove 2b is in close contact with the second protrusion 2d, and the one exterior wall material 2 is tilted relative to the other exterior wall material 2, until the apex of the shoulder portion 2B of the first recessed groove contacts the apex of the shoulder portion 2D of the second protrusion.

[0040] The surrounding wall (exterior wall) 3 of the barrel sauna device (structure) 1 shown in Figure 1 is constructed using the exterior wall material 2 shown in Figures 2 to 5. Therefore, even if there is a temperature difference or humidity difference between the inside and outside of the barrel sauna device 1, it is possible to provide a surrounding wall 3 of the barrel sauna device 1 that can maintain the airtightness of the joints (seams) 12 of adjacent exterior wall material 2 without using moisture-curing sealants or dry-curing sealants. This contributes to improving the thermal insulation performance of the barrel sauna device 1. In other words, even if the barrel sauna device 1 is used for a long period of time, the airtightness of the joints (seams) 12 of adjacent exterior wall material 2 will not decrease, preventing air from flowing in from the outside to the inside or heat from escaping from the inside to the outside (resulting in reduced thermal insulation). As a result, large-scale repairs at regular intervals will not be necessary.

[0041] Furthermore, since there is no need to use moisture-curing or drying-curing sealants (there is no need to fill the joints 12 of adjacent exterior wall materials 2 with moisture-curing or drying-curing sealants), the assembly workability of the barrel sauna device 1 can be improved. And, because moisture-curing sealants are not filled into the joints 12 of adjacent exterior wall materials 2, it becomes easier to dismantle the barrel sauna device 1 and reassemble it in another location (the relocation of the barrel sauna device 1).

[0042] In the above embodiment, the example given was that the structure is a barrel-shaped sauna device 1. However, the present invention is not necessarily limited to this configuration. In the present invention, the structure includes not only sauna devices (sauna rooms) such as barrel-shaped sauna devices, but also, for example, houses, sheds, warehouses, log houses, etc. The exterior wall materials used to construct the outer walls of these houses, sheds, warehouses, log cabins, etc., and box-shaped sauna devices do not necessarily need to be tilted as in the above embodiment.

[0043] [Examples of exterior wall materials] The following describes variations of exterior wall materials suitable for constructing the exterior walls of houses, sheds, warehouses, log cabins, and box-shaped sauna devices, with reference to Figures 6 and 7.

[0044] Figure 6 is an end view showing a modified example (other configuration) of the exterior wall material in this embodiment, where (a) is a minor modification of the exterior wall material shown in Figure 4(a), and (b) is the exterior wall material of (a) with the rounded edges removed and the corners made right angles. Figure 7 is an end view showing the exterior wall material shown in Figure 6 joined (sewn together) in two pieces, with (a) corresponding to Figure 6(a) and (b) corresponding to Figure 6(b).

[0045] The exterior wall material 2' shown in Figure 6(a) is simply the exterior wall material 2 shown in Figure 4(a) with the first protrusion 2a replaced by a first protrusion 2a' having a roughly rectangular cross-section and a size roughly equal to the end face size of the second groove 2c. Note that, along with the change in the end face size of the first protrusion, the end face size of the first groove has also been slightly reduced (this modified first groove is indicated by reference numeral 2b').

[0046] Using this exterior wall material 2', as shown in Figure 7(a), the first protrusion 2a' of one exterior wall material 2' can be fitted into the second recessed groove 2c of the other exterior wall material 2', making it possible to join (sew together) two adjacent exterior wall materials 2' so that their surfaces are flush. For example, this allows for the construction of exterior walls for box-shaped sauna devices, houses, sheds, etc.

[0047] The configuration of the exterior wall material 2' can also produce the same effects as those of the exterior wall material 2 (ensuring airtightness due to the double layer of irregularities at the joint (seam) portion 12).

[0048] The exterior wall material 2'' shown in Figure 6(b) is the same as the exterior wall material 2' shown in Figure 6(a), but with the rounded edges removed and the corners made right angles. In Figure 6(b), the reference numerals for each part corresponding to the first groove 2b' of the exterior wall material 2' are enclosed in quotation marks (""), and detailed explanations of each part are omitted.

[0049] By using this exterior wall material 2”, as shown in Figure 7(b), the first protrusion 2a” of one exterior wall material 2”, can be fitted into the second recess 2c” of the other exterior wall material 2”, so that two adjacent exterior wall materials 2”, are joined (sewn together) with their surfaces flush. This makes it possible to construct, for example, the exterior walls of a box-shaped sauna device, house, or shed.

[0050] The configuration of the exterior wall material 2' can also produce the same effects as those of the exterior wall material 2 (ensuring airtightness due to the double layer of irregularities at the joint (seam) portion 12).

[0051] Furthermore, in the above embodiments, the exterior wall materials 2, 2', and 2'' used in a horizontally extended state were used as examples for explanation. However, the present invention is not necessarily limited to such configurations. The exterior wall material of the present invention can also be used in a vertically extended state, for example. [Explanation of Symbols]

[0052] 1. Barrel-shaped sauna device 2,2',2” Exterior wall material 2a, 2a', 2a” First convex stripe 2b, 2b', 2b” First groove 2c,2c” Second groove 2d,2d” Second convex 2B Shoulder of the first groove 2D Second convex shoulder 3 Peripheral wall 4 Front wall 5. Hinged door 6. Skylight 7. Bamboo mat 8 chairs 9 Pedestals 10 Stainless steel bands 11. Asphalt roofing 12, 12', 12" Joint (seam)

Claims

1. A long, rectangular wooden exterior wall material used to construct an exterior wall that separates the interior and exterior of a structure, A first protrusion extending in the longitudinal direction is formed on one end face in the short direction of the exterior wall material, and a first groove extending in the longitudinal direction is formed outside the first protrusion. A second groove extending in the longitudinal direction is formed on the other end face in the short direction of the exterior wall material, and a second protrusion extending in the longitudinal direction is formed outside the second groove. An exterior wall material characterized in that a clearance is secured between the second groove and the first protrusion, such that the first protrusion can be tilted within the second groove.

2. The exterior wall material according to claim 1, wherein the end face shape of the first groove is substantially semi-elliptical, and the end face shape of the second ridge is substantially semi-elliptical, which is approximately the same as the end face shape of the first groove.

3. An exterior wall of a structure, characterized in that it is constructed using the exterior wall material described in either claim 1 or 2.

4. The outer wall of the structure according to claim 3, wherein the structure is a sauna device.

5. The outer wall of the structure according to claim 4, wherein the sauna device is a barrel-shaped sauna device.

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