JP2013249601A - Inorganic interior material and inorganic interior material joining structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inorganic interior material which enables ends to be easily joined together and which can secure fire resistance of this joint part, and an inorganic interior material joining structure.SOLUTION: An inorganic interior material 1 of the present invention has one end 10 provided with an arc-shaped convex part 2, and has the other end 11 provided with an arc-shaped concave part 3 capable of being fitted to the convex part 2. Additionally, in a structure for joining the inorganic interior materials 1, the inorganic interior material 1 having the joint-side end 10 provided with the arc-shaped convex part 2, and the inorganic interior material 1 having the joint-side end 11 provided with the arc-shaped concave part 3 are joined together by fitting the convex and concave parts 2 and 3 together.

Description

  The present invention relates to an inorganic interior material and a bonding structure of an inorganic interior material.

  The inorganic interior material 9 such as a gypsum board or a calcium silicate board is generally formed with both end portions 90 so as to have an end shape as shown in FIG.

  6 (a) shows a square edge with a right angle, FIG. 6 (b) shows a taper edge with a large corner cut obliquely, and FIG. 6 (c) shows a corner cut slightly diagonally. A bevel edge is shown, and FIG. 6 (d) shows a round edge with rounded corners.

  As shown in FIGS. 6 (b) to 6 (d), for example, when the inorganic interior materials are joined together, the joint tape that joins them and the putty that fills the joint tape are stored. This is to form a space for joint processing.

  However, when the corners are cut in this way, the thickness of the end portion of the inorganic interior material is reduced, and the fire resistance is lowered.

  In order to solve this problem, in Patent Document 1, the end portions 90 of the tapered edge of the gypsum board (calcium silicate plate) 9 are butted together, and the butted portion 91 whose thickness is reduced by this taper is joint-treated. It is disclosed that the plasterboards 9 are joined together by closing and the fire resistance of the butt portion 91 is ensured.

  As shown in FIG. 7, the joint processing is performed by attaching a joint tape 80 to the abutting portion 91, filling joint joint putty 81 on the joint tape 80, and filling finish putty 82 from above. The surface of the butted portion 91 is finished flat with respect to the surface of the gypsum board 9.

JP-A-8-27991

  However, as described above, in order to join inorganic interior materials such as gypsum board with cut corners and to ensure the fire resistance of the joined portion, joint treatment is required, and it takes time and effort. .

  Therefore, in view of the above circumstances, an object of the present invention is to propose an inorganic interior material and a joint structure of an inorganic interior material that can easily join end portions and ensure fire resistance of the joined portion. .

  In order to solve the above problems, the inorganic interior material of the present invention includes an arc-shaped convex portion at one end and an arc-shaped concave portion that can be fitted to the convex portion at the other end. And

  Moreover, in order to solve the said subject, the inorganic interior material of this invention equips one end part with a triangular-shaped convex part, and equips the other end part with the triangular-shaped recessed part which can be fitted to the said convex part. It is characterized by.

  Moreover, it is preferable that the said inorganic interior material is provided with the said convex part and the said recessed part in the right-and-left both ends while providing the said convex part and the said recessed part at the upper and lower both ends.

  The inorganic interior material is preferably a gypsum board or a calcium silicate board.

  In order to solve the above-mentioned problem, the inorganic interior material joining structure of the present invention is an inorganic interior material joining structure in which adjacent inorganic interior materials are joined together, and one of the inorganic interior materials is a joining side end. The other inorganic interior material is provided with an arc-shaped recess at the joining side end, and the one and the other inorganic interior material are connected between the protrusion and the recess. It is characterized by being joined by fitting.

  In order to solve the above-mentioned problem, the inorganic interior material joining structure of the present invention is an inorganic interior material joining structure in which adjacent inorganic interior materials are joined together, and one of the inorganic interior materials is a joining side end. The other inorganic interior material is provided with a triangular concave portion at the joining side end portion, and the one and the other inorganic material are fitted between the convex portion and the concave portion. It is characterized by being joined together.

  The inorganic interior material is preferably a gypsum board or a calcium silicate board.

  In the present invention, for example, by fitting a convex portion and a concave portion having an arc shape or a triangular shape, end portions of adjacent inorganic interior materials can be joined without performing joint treatment for joining. In the joint portion where the end portions are joined together, the void in the concave portion is filled with the convex portion, and the fire resistance of the joint portion can be ensured without performing joint treatment. Therefore, in this invention, joining of edge parts can be performed easily and the fire resistance of this joined part can be ensured.

(A) is a perspective view which shows the inorganic interior material of 1st embodiment of this invention, (b) is a perspective view which shows the joining structure which joined this inorganic interior material. (A) is a sectional side view of an example building structure using the same inorganic interior material, and (b) is a perspective view of this building structure. (A) is a sectional side view of the building structure of the other example which used the inorganic interior material same as the above, (b) is a perspective view of this building structure. It is a perspective view of the building structure of the other example using the inorganic interior material same as the above. (A) is a side view which shows the inorganic interior material of 2nd embodiment of this invention, (b) is a side view which shows the joining structure which joined this inorganic interior material, (c) is the present invention. It is a side view which shows the inorganic interior material of 3rd embodiment, (d) is a side view which shows the joining structure which joined this inorganic interior material, (e) is the inorganic interior material of 4th embodiment of this invention. It is a side view which shows material, (f) is a side view which shows the joining structure which joined this inorganic interior material, (g) is a side view which shows the inorganic interior material of 5th embodiment of this invention. (H) is a side view which shows the joining structure which joined this inorganic interior material. It is a side view which shows the edge part shape of a general inorganic interior material. It is a perspective view which shows the joining structure of gypsum board (calcium silicate board) provided with a taper edge.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The inorganic interior material 1 of this embodiment is a gypsum board, a calcium silicate board, or the like, and is used as a base of an outer wall, an inner wall, or a partition wall.

  As shown in FIG. 1A, the inorganic interior material 1 according to the first embodiment has a rectangular plate shape (rectangular plate shape), and one end portion 10 (upper end portion) has an arcuate convex portion 2 in a side view. The other end portion 11 (lower end portion) is provided with a concave portion 3 having a circular arc shape in a side view that can be fitted to the convex portion 2. The circular arc of the convex part 2 and the circular arc of the recessed part 3 become a shape which agree | coincides, and the convex part 2 and the recessed part 3 can be fitted substantially without gap.

  In this embodiment, the inorganic interior material 1 has dimensions of, for example, width 910 mm length 1820 mm, width 910 mm length 2420 mm, width 910 mm length 2730 mm, and thicknesses 9.5 mm, 12.5 mm, 15 mm, and 21 mm. It is. Here, the protruding dimension of the convex part 2 (the concave dimension of the concave part 3) is, for example, 2 to 5 mm.

  In this embodiment, the inorganic interior material 1 is provided with the convex part 2 and the recessed part 3 in the both ends 10 and 11 (upper end part and lower end part) of a transversal direction, respectively. Each of the convex portion 2 and the concave portion 3 is formed over the entire length in the longitudinal direction (left-right direction) of both end portions 10 and 11 in the short direction. The convex portion 2 has one end surface (upper end surface) in the short direction protruding in an arc shape in a side view over the entire length in the thickness direction, and the concave portion 3 has a thickness on the other end surface (lower end surface) in the short direction. It is dented in a circular arc shape when viewed from the side over the entire length. Both ends in the longitudinal direction of the inorganic interior material 1 are flat surfaces.

  As shown in FIG. 1 (b), the inorganic interior material 1 having the above-described configuration is arranged in two pieces in the vertical direction, and the end portions (joining side end portions) 10 and 11 are brought into contact with each other, whereby the convex portion 2 and the concave portion 3. And can be joined up and down. In this way, the joint portion where the convex portion 2 and the concave portion 3 are fitted has substantially the same thickness as the other portion (for example, the central portion in the short direction) of the inorganic interior material 1, and extends over the entire thickness direction. And filled with inorganic materials (gypsum and calcium silicate). Thereby, fire resistance comparable as the other part of the inorganic interior material 1 is ensured in a junction part.

  As described above, the inorganic interior materials 1 adjacent to each other in the vertical direction are joined by fitting, and the fire resistance of the joined portion is ensured. Therefore, in the inorganic interior material 1 of the present embodiment, as in the conventional example, the end portions 90 are connected to each other with a joint tape such as a glass fiber tape, or the end portion 90 is filled with putty or the like to be thick. The joint processing can be omitted and the end portions 10 and 11 can be joined easily.

  Moreover, even if the inorganic interior material 1 is deformed or contracted in the event of a fire, the adjacent inorganic interior materials 1 are joined by the concave-convex fitting between the convex portion 2 and the concave portion 3. Is difficult to make a gap.

  Moreover, in this embodiment, since the convex part 2 was made into circular arc shape, the surface of this convex part 2 becomes a guide surface. Therefore, when the end portions 10 and 11 of the inorganic interior material 1 adjacent to each other in the vertical direction are brought into contact with each other, the front end of the side wall of the recess 3 can be guided to the fitting position along the guide surface. It is easy.

  The inorganic interior material 1 mentioned above is used as a foundation | substrate of the building structure shown in FIGS.

  The building structure shown in FIGS. 2A and 2B is an example in which the inorganic interior material 1 is used horizontally so that the longitudinal direction is the left-right direction. The inorganic interior material 1 is fixed to the base material 7 such as a trunk edge by hitting fixing tools 70 such as screws and nails at both ends (left and right ends) in the longitudinal direction.

  An outer wall 6 composed of a plurality of sandwich panels 60 is disposed on the outdoor side of the inorganic interior material 1. The sandwich panel 60 is obtained by interposing a core material between two metal plates, and has a fitting convex part and a fitting concave part at upper and lower ends. The butted ends 10 and 11 of the inorganic interior material 1 lined up and down are joined by fitting, and the butted ends of the sandwich panel 60 lined up and down are joined by fitting. Here, the joining location of the inorganic interior material 1 and the joining location of the sandwich panel 60 are shifted in the vertical direction. Thereby, even if a flame enters from the joint location of the sandwich panel 60 in the event of a fire or the like, it is difficult to reach the joint location of the inorganic interior material 1. In addition, you may arrange | position so that the junction location of this inorganic interior material 1 and the junction location of the sandwich panel 60 may become the same height of an up-down direction. Further, by placing the base material 7 on the indoor side of the butted end portions of the sandwich panels 60 arranged side by side and the butted end portions of the inorganic interior materials 1 arranged side by side, the fire resistance of these butted end portions is arranged. We are trying to improve. The outer wall 6 is not limited to the sandwich panel 60 and may be other wall materials.

  Moreover, the building structure shown to Fig.3 (a), (b) is an example which used the inorganic interior material 1 by extending horizontally. The inorganic interior material 1 is fixed to a plurality of steel bases 72 through fixing tools 70 such as screws, over the longitudinal direction.

  On the outdoor side of the inorganic interior material 1, an outer wall 6 including a base 72, a base material 7 such as a trunk edge, a heat insulating material 71, and a sandwich panel 60 is disposed. The heat insulating material 71 may not be provided. The butted ends 10 and 11 of the inorganic interior material 1 lined up and down are joined by fitting, and the butted ends of the sandwich panel 60 lined up and down are joined by fitting. The joining location of the inorganic interior material 1 and the joining location of the sandwich panel 60 are shifted in the vertical direction to improve fire resistance. In addition, you may arrange | position so that the junction location of this inorganic interior material 1 and the junction location of the sandwich panel 60 may become the same height of an up-down direction. In addition, the base material 7 is disposed on the indoor side of the butted end portions of the sandwich panels 60 arranged on the left and right, and the steel base 72 is disposed on the outdoor side of the butted end portions of the inorganic interior materials 1 arranged on the left and right. Therefore, the fire resistance of these butt end portions is improved. The outer wall 6 is not limited to the sandwich panel 60 and may be other wall materials.

  Moreover, the building structure shown in FIG. 4 is an example in which the inorganic interior material 1 is used in a horizontal manner. The inorganic interior material 1 is attached to a base 72 such as a plurality of studs over the longitudinal direction. The inorganic interior material 1 may be fixed to the base 72 by striking with the fixing tool 70.

  A joist 73 is disposed on the indoor side of the inorganic interior material 1, and a base material 7 such as a pillar, a base 72, a heat insulating material 71, a waterproof sheet 74, and an outer wall 6 are disposed on the outdoor side of the inorganic interior material 1. Has been. The outer wall 6 is, for example, plastic, metal or ceramic siding 61. The butted ends 10 and 11 of the inorganic interior material 1 lined up and down are joined by fitting, and the butted ends of the sidings 61 lined up and down are joined by fitting. The joining location of the inorganic interior material 1 and the joining location of the siding 61 are shifted in the vertical direction to improve fire resistance. In addition, you may arrange | position so that the junction location of this inorganic interior material 1 and the junction location of the siding 61 may become the same height of an up-down direction. Further, by arranging the base material 7 on the indoor side of the butt end portion of the siding 61 arranged side by side and arranging the base material 72 on the outdoor side of the butt end portion of the inorganic interior material 1 arranged side by side, these The fire resistance of the butt end portion is improved.

  Moreover, although not shown in figure, the inorganic interior material 1 of this embodiment is used suitably also as a foundation | substrate of the indoor wall in which a cloth | cross etc. are stretched. Since the adjacent inorganic interior material 1 is joined by the fitting of the convex part 2 and the concave part 3, it is difficult to form a dent in the joint part, and a cross or the like can be pasted flatly without unevenness correction. it can.

  In addition, in the building structure of FIG.2, FIG.3, FIG.4 mentioned above, you may use the inorganic interior material 1 by overlapping in thickness direction. The inorganic interior materials 1 stacked in the thickness direction are bonded together by bonding, screws, or tucker. At this time, the joint location of the inorganic interior material 1 on one side in the thickness direction and the joint location of the inorganic interior material 1 on the other side in the thickness direction may be arranged so as to be displaced in the vertical direction, or the same in the vertical direction. You may arrange | position so that it may become height.

  Moreover, in the building structure of FIG.2, FIG.3, FIG.4 mentioned above, although the example which used the inorganic interior material 1 by horizontal stretch was demonstrated, you may use the inorganic interior material 1 by vertical stretch.

  Although the inorganic interior material 1 demonstrated the example provided with the circular-arc-shaped convex part 2 and the recessed part 3 in 1st embodiment demonstrated above, the shape of the convex part 2 and the recessed part 3 is not limited to this shape.

  The inorganic interior material 1 according to the second embodiment shown in FIGS. 5A and 5B has a rectangular plate shape (rectangular plate shape), and a convex portion having a triangular shape in side view at one end portion 10 (upper end portion). 2, and the other end portion 11 (lower end portion) is provided with a concave portion 3 having a triangular shape in side view that can be fitted to the convex portion 2. The triangle of the convex portion 2 and the triangular shape of the concave portion 3 are matched with each other, and the convex portion 2 and the concave portion 3 can be fitted with almost no gap. The convex portion 2 and the concave portion 3 are respectively formed over the entire length in the longitudinal direction of both end portions 10 and 11 in the lateral direction. Further, the convex portion 2 has one end surface (upper end surface) in the lateral direction protruding in a triangular shape in the side view over the entire length in the thickness direction, and the concave portion 3 is the other end surface (lower end surface) in the lateral direction. Is recessed in a triangular shape in side view over the entire length in the thickness direction.

  As shown in FIG. 5B, the inorganic interior material 1 having the above-described configuration is arranged so that the convex portion 2 and the concave portion 3 are fitted by aligning the end portions 10 and 11 together. Can be joined. In this way, the joint portion where the convex portion 2 and the concave portion 3 are fitted has substantially the same thickness as the other portion (for example, the central portion in the short direction) of the inorganic interior material 1, and extends over the entire thickness direction. And filled with inorganic materials (gypsum and calcium silicate). Thereby, fire resistance comparable as the other part of the inorganic interior material 1 is ensured in a junction part. Also in the inorganic interior material 1 of the present embodiment, similarly to the inorganic interior material 1 of the first embodiment, it is possible to reduce the labor for joint processing, and the end portions 10 and 11 can be joined easily.

  Moreover, in this embodiment, since the convex part 2 was made into triangle shape, the surface of this convex part 2 becomes a guide surface. Therefore, when the end portions 10 and 11 of the inorganic interior material 1 adjacent to each other in the vertical direction are brought into contact with each other, the front end of the side wall of the recess 3 can be guided to the fitting position along the guide surface. It is easy. Further, when the end portions 10 and 11 are brought into contact with each other, the triangular tip becomes a mark of a position along the tip of the side wall of the recess 3, so that it is easier to match compared to the first embodiment. Yes.

  Moreover, the inorganic interior material 1 of 3rd embodiment shown to FIG.5 (c), (d) is rectangular plate shape (rectangular plate shape), and is circular at one edge part 10 (upper edge part) of a transversal direction. An arc-shaped convex portion 2 is provided, and an arc-shaped concave portion 3 that can be fitted to the convex portion 2 is provided at the other end portion 11 (lower end portion) in the lateral direction. The circular arc of the convex part 2 and the circular arc of the recessed part 3 become a shape which agree | coincides, and the convex part 2 and the recessed part 3 can be fitted substantially without gap. The convex portion 2 and the concave portion 3 are respectively formed over the entire length in the longitudinal direction of both end portions 10 and 11 in the lateral direction. The convex portion 2 is formed by projecting the central portion in the thickness direction of one end surface (upper end surface) in the short direction in an arc shape, and the concave portion 3 is formed in the other end surface (lower end surface) in the short direction. The central part in the thickness direction is recessed in an arc shape. For this reason, both end portions 10 and 11 are provided with flat abutting surfaces 4 that come into contact with each other when abutting each other.

  By providing the abutting surface 4 in this way, in the inorganic interior material 1 of the third embodiment, when the two adjacent inorganic interior materials 1 are joined, the abutting surfaces 4 come into contact with each other, so that a stable state is achieved. Can be joined. Moreover, also in the inorganic interior material 1 of 3rd embodiment, like the inorganic interior material 1 of 1st embodiment, it is easy to match | combine and can join end part 10 and 11 easily, and fire resistance of a junction part. Is also secured.

  Moreover, the inorganic interior material 1 of 4th embodiment shown to FIG.5 (e), (f) is a rectangular plate shape (rectangular plate shape), and it is a triangle in one edge part 10 (upper end part) of a transversal direction. A convex portion 2 having a shape is provided, and a triangular concave portion 3 that can be fitted to the convex portion 2 is provided at the other end portion 11 (lower end portion) in the short direction. The triangle of the convex portion 2 and the triangular shape of the concave portion 3 are matched with each other, and the convex portion 2 and the concave portion 3 can be fitted with almost no gap. The convex portion 2 and the concave portion 3 are respectively formed over the entire length in the longitudinal direction of both end portions 10 and 11 in the lateral direction. The convex portion 2 is formed by projecting the central portion in the thickness direction out of one end surface (upper end surface) in the short direction in a triangular shape, and the concave portion 3 is formed in the other end surface (lower end surface) in the short direction. The center in the thickness direction is recessed in a triangular shape. For this reason, both end portions 10 and 11 are provided with flat abutting surfaces 4 that come into contact with each other when abutting each other.

  By providing the abutting surface 4 in this manner, in the inorganic interior material 1 of the fourth embodiment, when the two adjacent inorganic interior materials 1 are joined, the abutting surfaces 4 come into contact with each other, so that a stable state is achieved. Can be joined. Moreover, also in the inorganic interior material 1 of the fourth embodiment, as with the inorganic interior material 1 of the second embodiment, it is easy to make a match, and the end portions 10 and 11 can be easily joined together, and the fire resistance of the joined portion. Is also secured.

  Moreover, the inorganic interior material 1 of 5th embodiment shown to FIG.5 (g), (h) is a rectangular plate shape (rectangular plate shape), and is rectangular at one edge part 10 (upper end part) of a transversal direction. A convex portion 2 having a shape is provided, and a rectangular concave portion 3 that can be fitted to the convex portion 2 is provided at the other end portion 11 (lower end portion) in the short side direction. The rectangular shape of the convex portion 2 and the rectangular shape of the concave portion 3 coincide with each other, and the convex portion 2 and the concave portion 3 can be fitted with almost no gap. The convex portion 2 and the concave portion 3 are respectively formed over the entire length in the longitudinal direction of both end portions 10 and 11 in the lateral direction. The convex portion 2 is formed by projecting the central portion in the thickness direction out of one end surface (upper end surface) in the short direction in a rectangular shape, and the concave portion 3 is formed in the other end surface (lower end surface) in the short direction. The central part in the thickness direction is recessed in a rectangular shape. For this reason, both end portions 10 and 11 are provided with flat abutting surfaces 4 that come into contact with each other when abutting each other.

  By providing the abutting surface 4 in this manner, in the inorganic interior material 1 of the fifth embodiment, when the two adjacent inorganic interior materials 1 are joined, the abutting surfaces 4 come into contact with each other, so that a stable state is obtained. Can be joined. Also, in the inorganic interior material 1 of the fifth embodiment, similarly to the inorganic interior material 1 of the first to fourth embodiments, the end portions 10 and 11 can be easily joined to each other, and the fire resistance of the joint portion is also ensured. Is done.

  When the inorganic interior material 1 of the first to fifth embodiments described above is formed of gypsum board, it is manufactured as follows, for example.

  First, on the cover, a mixer places a slurry of calcined gypsum, water, and various additives. The slurry is then covered with a backing paper. Here, the cover is folded upward so that both end portions in the short direction form a predetermined shape such as the above-described arc shape, triangle shape, or rectangular shape. Next, the backing paper and the slurry are pressed and adjusted to a predetermined thickness. At this time, the slurry spreads to both ends of the cover, and both ends of the slurry have the same shape as both ends of the cover. Next, after the slurry spreads to both ends of the cover, the upper end of the cover is folded and stacked on the backing paper. When the slurry water and calcined gypsum react and the gypsum reaches a predetermined fixed state, the gypsum board is cut to have a predetermined length in the longitudinal direction. Individual gypsum boards are passed through a furnace to remove excess moisture. Next, the finished end is ground by grinding. Note that the gypsum at both end portions in the short direction may be harder gypsum than other portions for reinforcement.

  Moreover, when forming the inorganic interior material 1 of 1st thru | or 5th embodiment mentioned above with a calcium-silicate board, it manufactures as follows, for example.

  First, a calcareous raw material such as slaked stone and cement, a siliceous raw material such as silica sand and diatomaceous earth, and a raw material mainly composed of reinforcing fibers such as pulp and carbon fiber are mixed into a slurry, and the raw material slurry is made into a paper machine It is formed into a plate shape by, for example. At this time, it shape | molds so that both end part shape may become the predetermined shape mentioned above. Then, it is cured by high temperature and high pressure steam by autoclave. Note that the slurry at both end portions in the short direction may be harder than the other portions for reinforcement.

  In the inorganic interior material 1 of the first to fifth embodiments described above, the convex portions 2 and the concave portions 3 are provided at both ends 10 and 11 in the short direction, but the present invention is not limited to this.

  The inorganic interior material 1 of the sixth embodiment (not shown) includes the convex portions 2 and the concave portions 3 at both ends 10 and 11 in the lateral direction, and the convex portions at both longitudinal ends 10 and 11 (both left and right end portions). 2 and a recess 3. That is, the inorganic interior material 1 includes a convex portion 2 formed over the entire length in the longitudinal direction at one end portion 10 in the short direction, and extends over the entire length in the longitudinal direction at the other end portion 11 in the short direction. The recess 3 is formed. This inorganic interior material 1 is further provided with a convex portion 2 formed over the entire length in the short direction at one end portion 10 in the longitudinal direction, and the entire length in the short direction at the other end portion 11 in the longitudinal direction. A concave portion 3 is formed. By setting it as such a structure, the inorganic interior materials 1 adjacent to the upper and lower sides and the inorganic interior materials 1 adjacent to the right and left can also be joined by fitting with the convex part 2 and the recessed part 3. FIG. Thereby, the construction labor of joint processing can be omitted, and workability is improved.

  Moreover, when this inorganic interior material 1 is used for the building structure shown in FIGS. 2 to 4, not only can the fire resistance of the butt ends of the inorganic interior materials 1 arranged vertically be ensured, but also the inorganic interior materials arranged side by side. The fire resistance of the butt end portion of the material 1 can also be secured. Therefore, it is not necessary to arrange the butted end portions of the inorganic interior materials 1 arranged on the left and right sides on the indoor side or the outdoor side of the base material 7 or the base 72, and the workability is improved also in this respect.

  Although the present invention has been described based on the embodiments shown in the accompanying drawings, the present invention is not limited to the above-described embodiments, and appropriate design changes can be made within the intended scope of the present invention. It is.

DESCRIPTION OF SYMBOLS 1 Inorganic interior material 2 Convex part 3 Concave part 10 End part (joining side edge part)
11 End (joining side end)

Claims (7)

  An inorganic interior material comprising an arc-shaped convex portion at one end portion and an arc-shaped concave portion that can be fitted to the convex portion at the other end portion.   An inorganic interior material comprising a triangular convex portion at one end and a triangular concave portion that can be fitted to the convex portion at the other end.   The inorganic interior material according to claim 1, wherein the upper and lower ends are provided with the convex portion and the concave portion, and the left and right end portions are provided with the convex portion and the concave portion.   The said inorganic interior material is a gypsum board or a calcium silicate board, The inorganic interior material as described in any one of Claims 1-3 characterized by the above-mentioned. It is a joint structure of inorganic interior materials obtained by joining adjacent inorganic interior materials,
One of the inorganic interior materials is provided with an arc-shaped convex portion at the joining side end,
The other inorganic interior material is provided with an arc-shaped recess at the joining side end,
A joining structure of inorganic interior materials, wherein the one and the other inorganic interior materials are joined by fitting the convex portions and the concave portions. It is a joint structure of inorganic interior materials obtained by joining adjacent inorganic interior materials,
One of the inorganic interior materials is provided with a triangular convex portion at the joint side end,
The other inorganic interior material is provided with a triangular recess at the joint side end,
A joining structure of inorganic interior materials, wherein the one and the other inorganic interior materials are joined by fitting the convex portions and the concave portions.   The inorganic interior material joining structure according to claim 5 or 6, wherein the inorganic interior material is a gypsum board or a calcium silicate plate.

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