Mullion

Abstract

To provide a mullion that can achieve both supporting right and left face materials at an angle and improving design of an exterior appearance.SOLUTION: A mullion for partitioning an outdoor side and an indoor side and supporting right and left face materials arranged at an angle, comprises: a face material support portion for supporting the right and left face materials; and an indoor side extension portion continuous with the face material support portion and extending toward the indoor side. The face material support portion has right and left support faces respectively facing side end parts of the right and left face materials, and face material accommodating grooves provided on the right and left support faces, respectively, for accommodating the side end parts of the right and left face materials. At least one of the right and left support faces is an inclined surface that is inclined about an end part on the outdoor side with respect to a mullion center line along a depth direction.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to a mullion. [Background technology]

[0002] Conventionally, a mullion that supports left and right panel materials at an angle has been known (see, for example, Patent Document 1). This mullion has a pair of frame bodies that support the side ends of the left and right panel materials, respectively. The pair of frame bodies are each formed from a U-shaped cross-section shaped material. The pair of frame bodies are disposed symmetrically at both the left and right ends of a connecting body having a pickaxe-shaped cross-section, and each is attached so that the angle can be adjusted. This mullion can change the angle between the left and right panel materials by changing the opening angle of the pair of frame bodies relative to the connecting body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Jpn. Jpn. Published No. 48-23123 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional mullions, when the opening angle of the frame body changes, the overall visible width of the mullion changes. As a result, the visible width when the mullion is viewed from the front from the outside and inside of the room changes every time the angle between the left and right paneling changes, which reduces the design. Therefore, the inventors discovered the problem that it is difficult to simultaneously support the left and right paneling at an angle with the mullion and improve the design of the exterior of the mullion.

[0005] The present disclosure aims to provide a mullion that can simultaneously support left and right panel materials at an angle while improving the design of the exterior. [Means for solving the problem]

[0006] The present disclosure relates to a mullion that divides the outside and inside of the room and supports left and right panel materials arranged at an angle, the mullion comprising a panel support portion that supports the left and right panel materials and an indoor extension portion that is continuous with the panel support portion and extends toward the inside of the room, the panel support portion having left and right support surfaces that respectively face the side ends of the left and right panel materials, and panel accommodating grooves provided on the left and right support surfaces, respectively, for accommodating the side ends of the left and right panel materials, and at least one of the left and right support surfaces is an inclined surface that is inclined about the outside end with respect to the mullion center line that runs along the projection direction. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a plan view showing a curved wall using a mullion according to the present embodiment. [Diagram 2] 2 is a front view of the curved wall as viewed from the (II) direction in FIG. 1, developed laterally. [Diagram 3] FIG. 3 is a vertical cross-sectional view of the curved wall taken along the line (III)-(III) in FIG. 2. [Figure 4] 2 is a cross-sectional view showing a connection portion between a mullion and a lattice member at part (IV) in FIG. 1. [Diagram 5] 5 is an exploded cross-sectional view of the first mullion shown in FIG. 4. [Figure 6] 2 is a cross-sectional view showing a connection portion between the mullion and the interlocking member of part (VI) in FIG. 1. [Figure 7] 7 is an exploded cross-sectional view of the second mullion shown in FIG. 6. FIG. [Figure 8] 2 is a cross-sectional view showing a connection portion between the mullion and the interlocking member of part (VIII) in FIG. 1. [Figure 9] 9 is an exploded cross-sectional view of the third mullion shown in FIG. 8. FIG. [Figure 10] 2 is a cross-sectional view showing the connection portion between the mullion and the lattice member at (X) in FIG. 1. [Figure 11] 11 is an exploded cross-sectional view of the fourth mullion shown in FIG. 10. FIG. [Figure 12] 7 is a cross-sectional view showing the fixing structure between the second mullion and the interlocking member shown in FIG. 6. FIG. [Figure 13] 9 is a cross-sectional view showing the fixing structure between the third mullion and the interlocking member shown in FIG. 8. FIG. [Figure 14] 11 is a cross-sectional view showing the fixing structure between the fourth mullion and the interlocking member shown in FIG. 10. FIG. [Figure 15] FIG. 11 is a cross-sectional view of a curved wall having a fifth mullion when forming an inside corner. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings. Figures 1 and 2 show a curved wall 1 according to this embodiment. In the curved wall 1, a mullion 2 is disposed between each of a plurality of panel materials 3 arranged in a planar shape in the horizontal direction. The side ends of the panel materials 3, 3 on either side of the mullion 2 are supported by the mullion 2.

[0009] X1 in the figure indicates the outdoor side, which is bounded by the curved wall 1. X2 indicates the indoor side, which is bounded by the curved wall 1. In the following explanation, the front direction is the direction along the straight line that is perpendicular to the curved wall 1 and connects the outdoor side X1 and the indoor side X2. The front direction is the direction along the surface direction of the curved wall 1, and is the left-right direction perpendicular to the front direction. The front surface is the surface of the curved wall 1 that faces the outdoor side X1 or the indoor side X2. The left and right are the lateral directions when the curved wall 1 is viewed from the front from the outdoor side X1, with the observer's left hand side being the left and the right hand side being the right. The up and down are the up and down along the direction of gravity.

[0010] The multiple face materials 3 of the curved wall 1 shown in this embodiment are arranged in a planar shape so as to be curved at a right angle in a plan view. As a result, the curved wall 1 forms a curved surface that is convex toward the outside side X1.

[0011] The surface material 3 is a rectangular plate-like member such as a glass plate or a panel plate. When the surface material 3 is a glass plate, the curved wall 1 constitutes a glass wall. As shown in Figures 2 and 3, each surface material 3 is supported all around by mullions 2, 2 arranged on the left and right, a mullion 4 arranged above, and a baseboard 5 arranged below. The mullion 4 and baseboard 5 are hung between the left and right mullions 2, 2. The length of the mullion 4 in the projection direction is greater than the length of the baseboard 5 in the projection direction. In the curved wall 1 shown in Figure 1, some of the multiple surface materials arranged between the left and right mullions 2, 2 are composed of opening and closing doors 6.

[0012] Next, we will explain the mullions 2 used in the curved wall 1. Four types of mullions 2 are used in the curved wall 1 shown in Figure 1. In the following, the four types of mullions 2 are referred to as the first mullion 2A, the second mullion 2B, the third mullion 2C, and the fourth mullion 2D.

[0013] First, the first column 2A will be described.

[0014] The first mullion 2A is used to support left and right panel members 3,3 that are not angled, as shown in Figure 4. Not angled means that the left and right panel members 3,3 are arranged at an angle of 180° to the left and right. In more detail, the left and right panel members 3,3 are arranged at an angle of 90° to the mullion center line CL along the projection direction of the first mullion 2A. In other words, the left and right panel members 3,3 are arranged in a straight line in the projection direction at an angle of 180° to each other.

[0015] The first support 2A is formed of an extruded material using a metal material such as aluminum, and is formed into a hollow rectangular shape that is long in the projection direction. As shown in Fig. 3, the first support 2A extends in the vertical direction between the slab 100 and the beam 110 of the building skeleton.

[0016] The first upright 2A is fixed to the slab 100 by a pair of L-shaped brackets 101, 101. The pair of L-shaped brackets 101, 101 are arranged to sandwich from the left and right a lower end portion of the first upright 2A on the room side X2 relative to the panel 3. The pair of L-shaped brackets 101, 101 are fixed to the lower end portion of the first upright 2A by multiple bolts 102, and are also fixed to the slab 100 by anchor bolts 103, 103, respectively.

[0017] The upper end of the first upright 2A is fixed by a pair of L-shaped brackets, similar to the lower end. As shown in Fig. 3, the pair of L-shaped brackets 111, 111 are arranged to sandwich the upper end of the first upright 2A, which is on the room side X2 of the panel 3, from the left and right. The pair of L-shaped brackets 111, 111 are fixed to the upper end of the first upright 2A by bolts 112, and are also fixed to the cross member 120 provided on the lower surface of the beam member 110 by bolts 113, 113, respectively.

[0018] As shown in Fig. 3, the floor surface FL on the indoor side X2 is disposed above the slab 100 with a predetermined distance therebetween. The lower end of the first mullion 2A extends below the floor surface FL. The pair of L-shaped brackets 101, 101 are disposed below the floor surface FL.

[0019] The fixing structure of the mullion 2 using the upper and lower pairs of L-shaped brackets 111, 111, 101, 101 is common to the first mullion 2A, the second mullion 2B, the third mullion 2C, and the fourth mullion 2D. Therefore, the above explanation of the fixing structure of the first mullion 2A is used for the fixing structures of the second mullion 2B, the third mullion 2C, and the fourth mullion 2D described below, and a detailed explanation will be omitted.

[0020] As shown in Fig. 4, the first mullion 2A has a panel support part 21 which is a part supporting the left and right panel materials 3, 3, an indoor extension part 22 which is integrally provided on the indoor side X2 of the panel support part 21, and a decorative cover 23 which forms the visible surface of the indoor side X2 of the first mullion 2A. The first mullion 2A has a hollow structure extending from the panel support part 21 to the indoor extension part 22. The indoor extension part 22 extends toward the indoor side X2, continuing from the panel support part 21. The width of the first mullion 2A in the left-right direction is formed to be the same width from the panel support part 21 to the indoor extension part 22, except for the areas of the panel storage grooves 212a, 212b described later. The upper and lower L-shaped brackets 111, 111, 101, 101 are arranged on the indoor extension part 22, and fix the upper and lower ends of the indoor extension part 22 to the cross member 120 of the beam member 110 and the slab 100, respectively.

[0021] The end face of the exterior side X1 of the panel support part 21 constitutes the exterior side X1 sighting surface 20 of the first mullion 2A. The exterior side X1 sighting surface 20 of the first mullion 2A is a flat surface that is arranged perpendicular to the mullion center line CL and parallel to the left and right panel members 3, 3.

[0022] The panel support portion 21 has support surfaces 211a, 211a that support the left and right panel materials 3, 3 of the first mullion 2A. The support surfaces 211a, 211a are arranged opposite the side ends 3a, 3a of the left and right panel materials 3, 3. The support surfaces 211a, 211a are formed over the entire vertical length of the first mullion 2A. The projection length of the support surfaces 211a, 211a is equal to or greater than the projection length of the batten 4. In other words, the support surfaces 211a, 211a have a projection dimension equal to or greater than the width of the batten 4.

[0023] The left and right support surfaces 211a, 211a are arranged parallel to each other and to the vertical center line CL. The left and right support surfaces 211a, 211a are arranged perpendicular to the surface direction of the left and right panel members 3, 3. The left and right support surfaces 211a, 211a and the left and right side surfaces 221, 221 of the indoor extension portion 22 are continuous in a flush manner without any steps along the projection direction.

[0024] The panel support portion 21 is provided with panel accommodating grooves 2112a, 212b for accommodating the side ends 3a, 3a of the left and right panel materials 3, 3. The panel accommodating grooves 212a, 212b are disposed at the ends of the support surfaces 211a, 211a on the outside X1 close to the sight surface 20, and extend along the vertical direction of the first mullion 2A. The panel accommodating grooves 212a, 212b are formed so as to recess in a U-shape from the support surfaces 211a, 211a toward the mullion center line CL.

[0025] The left and right panel material receiving grooves 212a, 212b have different depths from the support surfaces 211a, 211a. As shown in FIG. 4, the panel material receiving groove 212a located on the left side is deeper than the panel material receiving groove 212b located on the right side. This allows one side end 3a of the panel material 3 to be inserted deeply into the panel material receiving groove 212a when the panel material 3 is placed between the left and right mullions 2, 2, so that the other side end 3a of the panel material 3 can be easily accommodated in the panel material receiving groove 212b. The panel material receiving grooves 212a, 212b in which the side ends 3a, 3a of the panel materials 3, 3 are accommodated are filled with caulking material 213 to hold the panel materials 3, 3.

[0026] As shown in Fig. 4, end face 4a of the barm 4 is machined perpendicular to the extension direction of the barm 4 (left-right direction in Fig. 4). End face 4a of the barm 4 abuts against left and right support faces 211a, 211a of the panel support part 21 from the left-right direction perpendicular to the direction. In other words, the barm 4 abuts against the support faces 211a, 211a at right angles. End faces of baseboards 5, not shown in Fig. 4, are machined in the same manner as end face 4a of the barm 4.

[0027] The indoor extension 22 has a shape in which the panel support part 21 is extended towards the indoor side X2. The indoor extension 22 mainly functions as a fixed part to the building frame on the indoor side X2 of the panel 3 of the curved wall 1, and is a part to which L-shaped brackets 111, 111 and 101, 101 are fixed at the upper and lower ends, respectively. The left and right side surfaces 221, 221 of the indoor extension 22 are flush with the support surfaces 211a, 211b, which are the left and right side surfaces of the panel support part 21, and are arranged parallel to the mullion center line CL. The mullion center line CL is a line that extends along the projection direction through the center of the indoor extension 22 in the left-right direction.

[0028] The decorative cover 23 is an extrusion made of a metal material such as aluminum. The decorative cover 23 is formed in a flat plate shape with the same width as the left-right width of the indoor extension 22. Engagement claws 231, 231 that protrude toward the outdoor side X1 are integrally formed on both left and right side edges of the decorative cover 23. The decorative cover 23 is engaged with a pair of engagement claws 231, 231 from the indoor side X2 to engagement recesses 221b, 221b provided on the left and right end edges of the indoor side X2 of the indoor extension 22. As a result, the decorative cover 23 is attached to the indoor side X2 of the indoor extension 22 and forms a visible surface of the indoor side X2 of the first mullion 2A.

[0029] The overall forward length of the first upright 2A along the upright center line CL, the left-right width of the indoor extension 22, and the configuration of the decorative cover 23 are common to the second upright 2B, third upright 2C, and fourth upright 2D described later.

[0030] Next, the configuration of the panel support portion 21 and the indoor extension portion 22 of the first mullion 2A will be described in further detail with reference to FIG.

[0031] The panel support part 21 and the indoor extension part 22 of the first upright 2A are divided into a left part 24 which forms the left side surface extending between the panel support part 21 and the indoor extension part 22, and a right part 25 which forms the right side surface extending between the panel support part 21 and the indoor extension part 22. The panel support part 21 and the indoor extension part 22 are formed by assembling the left part 24 and the right part 25 together.

[0032] The left part 24 of the first upright 2A is formed with a left support surface 211a of the panel support part 21, a panel accommodating groove 212a, and a left side surface 221 of the indoor extension part 22 that is flush with the support surface 211a without any steps.

[0033] An end 24a on the outdoor side X1 of the left-side component 24 extends from the opening edge of the panel accommodating groove 212a toward the outdoor side X1. An outdoor side protrusion 241 that protrudes toward the right-side component 25 is formed on this end 24a. The outdoor side protrusion 241 extends along the up-down direction of the left-side component 24 (the direction perpendicular to the paper surface of FIG. 5).

[0034] An indoor side protrusion piece 242 that protrudes toward the right side component 25 is formed on the end portion 24b of the left side component 24 on the indoor side X2. The indoor side protrusion piece 242 extends along the up-down direction of the left side component 24 (the direction perpendicular to the paper surface of FIG. 5).

[0035] A pair of protrusions 243, 243 are formed at the bottom of the face material accommodating groove 212a of the left component 24. The pair of protrusions 243, 243 are arranged in parallel at a predetermined interval in the projection direction, and protrude from the bottom of the face material accommodating groove 212a toward the right component 25. The pair of protrusions 243, 243 extend in the up-down direction of the left component 24 (the direction perpendicular to the paper surface of FIG. 5).

[0036] The right-side part 25 of the first upright 2A is formed with a right-side support surface 211a of the panel support part 21, a panel accommodating groove 212b, and a right-side side surface 221 of the indoor extension part 22 that is flush with the support surface 211a without any steps.

[0037] An end 25a on the outside side X1 of the right-side component 25 extends from the opening edge of the panel accommodating groove 212b towards the outside side X1. An outside visible wall portion 251 that protrudes towards the left-side component 24 is formed at this end 25a. The outside visible wall portion 251 is a portion that forms the visible surface 20 on the outside side X1 of the first mullion 2A, and extends along the up-and-down direction of the right-side component 25 (the direction perpendicular to the paper surface of FIG. 8). An outside engagement groove 251a that opens towards the left-side component 24 is formed at the tip edge of the outside visible wall portion 251.

[0038] An indoor side projection wall portion 252 that protrudes toward the left side component 24 is formed at the end portion 25b on the indoor side X2 of the right side component 25. The indoor side projection wall portion 252 extends in the vertical direction of the right side component 25 (perpendicular to the paper surface of FIG. 5) and forms a projection surface on the indoor side X2 of the indoor side extension portion 22 of the first mullion 2A. An indoor side engagement groove 252a that opens toward the left side component 24 is formed at the tip edge of the indoor side projection wall portion 252.

[0039] A pair of protrusions 253, 253 are formed on the bottom of the face material accommodating groove 212b of the right-side component 25. The pair of protrusions 253, 253 are arranged in parallel at a predetermined interval in the projection direction, and protrude from the bottom of the face material accommodating groove 212b toward the left-side component 24. The pair of protrusions 253, 253 extend in the up-down direction of the right-side component 25 (the direction perpendicular to the paper surface of FIG. 5).

[0040] The left part 24 and the right part 25 are assembled by engaging the outdoor projection 241 and the indoor projection 242 of the left part 24 with the outdoor engagement groove 251a and the indoor engagement groove 252a of the right part 25. Then, they are fastened by a screw 200a inserted from the surface material accommodating groove 212a of the left part 24 to the surface material accommodating groove 212b of the right part 25 and a screw 200b inserted between the indoor side projecting wall portion 252 of the right part 25 and the indoor side projection 242 of the left part 24. A pair of protrusions 243, 243 of the left part 24 is accommodated between the pair of protrusions 253, 253 of the right part 25. The protrusions 243, 243 and the protrusions 253, 253 engage with each other to prevent the left and right surface material accommodating grooves 212a, 212b from directly contacting each other. After the left part 24 and the right part 25 are assembled together in this manner, a decorative cover 23 is attached to the indoor side X2 surface of the indoor side extension part 22.

[0041] Next, the second mullion 2B will be described.

[0042] In the second bar 2B shown in Fig. 6, the parts with the same reference numerals as those of the first bar 2A have the same configuration. Therefore, the description of the first bar 2A is used for these parts, and the following description focuses on the differences in configuration from the first bar 2A.

[0043] The second mullion 2B is used when the left and right panel materials 3, 3 are arranged at an angle, as shown in FIG. 6. Arranged at an angle means that the left and right panel materials 3, 3 are arranged left and right so that they intersect at an angle other than 180°. In detail, the panel material 3 on the right side of the second mullion 2B is arranged at an angle to the panel material 3 on the left side. The panel material 3 on the left side is arranged at an angle of 90° to the mullion center line CL, but the panel material 3 on the right side is arranged at an angle to the room side X2 to the mullion center line CL. In other words, the left and right panel materials 3, 3 are arranged side by side in the viewing direction so that they intersect at an angle smaller than 180° when viewed from the room side X2.

[0044] The panel support portion 21 of the second mullion 2B has left and right support surfaces 211a, 211b that abut the end faces 4a of the lattice members 4 arranged on the left and right sides of the second mullion 2B. The end faces 4a of the lattice members 4 are also machined perpendicular to the extension direction of the lattice members 4.

[0045] The support surface 211a arranged on the left side in Fig. 6 has the same configuration as the support surface 211a on the left side of the first mullion 2A shown in Fig. 4. That is, the support surface 211a is arranged parallel to the mullion center line CL and is continuous flush with the left side surface 221 of the indoor extension part 22 without any steps.

[0046] The support surface 211b located on the right side in Fig. 6 is an inclined surface that inclines toward the inside X2 of the mullion around the end 211b1 on the outside X1 side with respect to the mullion center line CL. More specifically, the end 211b1 on the outside X1 side of the support surface 211b is connected to the right edge of the visible surface 20 on the outside X1 side of the second mullion 2B. The inclined support surface 211b is formed flat except for the surface material accommodation groove 212b. The support surface 211b is linearly inclined from the end 211b1 on the outside X1 side toward the inside extension 22 so as to approach the mullion center line CL.

[0047] The end 211b2 on the indoor side X2 of the support surface 211b is closer to the mullion center line CL than the end 221a on the outdoor side X1 of the right side 221 of the indoor extension 22. The end 211b2 on the indoor side X2 of the support surface 211b and the end 221a on the outdoor side X1 of the right side 221 of the indoor extension 22 are connected by a step wall portion 214. As a result, the second mullion 2B has a concave shape on the support surface 211b side at the boundary between the panel support portion 21 and the indoor extension 22. The support surface 211b and the step wall portion 214 intersect at a right angle.

[0048] The support surface 211b of the second mullion 2B is arranged to intersect at a right angle with the panel 3 on the right side in FIG. 6. Therefore, the panel 3 on the right side is inclined toward the room inside X2 with respect to the mullion center line CL according to the inclination angle of the support surface 211b. The left and right panel materials 3, 3 are arranged to intersect so as to be convex toward the room outside X1 in accordance with the inclination of the support surface 211b. In this way, the second mullion 2B forms a protruding corner portion of the curved wall 1.

[0049] The sight surface 20 of the second mullion 2B on the outside X1 is composed of two surfaces 20a, 20b that intersect with each other at the mullion center line CL. The surface 20a arranged on the left side of the mullion center line CL is arranged to intersect with the left support surface 211a at a right angle and is arranged parallel to the surface direction of the surface material 3 supported by the support surface 211a. The surface 20b arranged on the right side of the mullion center line CL is arranged to intersect with the right support surface 211b at a right angle and is arranged parallel to the surface direction of the surface material 3 supported by the support surface 211b. Therefore, the two surfaces 20a, 20b of the sight surface 20 of the outside X1 of the second mullion 2B intersect with each other at the same intersection angle as the left and right surface materials 3, 3 so as to be convex toward the outside X1.

[0050] Because the surface directions of the left and right panel members 3,3 are perpendicular to the left and right support surfaces 211a, 211b, respectively, the end face 4a of the panel 4 that abuts the right support surface 211b, which is an inclined surface, is also machined perpendicular to the extension direction of the panel 4, just like the panel 4 that abuts the left support surface 211a, which is not an inclined surface. Therefore, the panel 4 abuts perpendicularly to the support surfaces 211a, 211b of the second mullion 2B, respectively. Because there is no need to machine the end face 4a of the panel 4 at an angle to the extension direction of the panel 4 to match the inclination of the support surfaces 211a, 211b, the panel 4 that abuts the second mullion 2B that forms the projected corner portion can be easily machined.

[0051] The inclined right support surface 211b is inclined toward the mullion center line CL from the end 211b1 of the support surface 211b on the outside side X1 toward the inside side X2, so that the left-right visibility width W2 of the sight surface 20 on the outside side X1 of the second mullion 2B is not significantly different from the left-right visibility width W1 of the sight surface 20 on the outside side X1 of the first mullion 2A shown in Figure 4. Therefore, when looking at the second mullion 2B from the outside side X1, it is difficult to feel a change in the visibility width from the first mullion 2A, and no incongruity in design occurs.

[0052] The sight surface 20 on the outside side X1 of the second upright 2B is formed by two surfaces 20a, 20b that intersect at an angle similar to the intersection angle of the left and right panel materials 3,3, so that even when the line of sight is moved from the outside side X1 to the left and right panel materials 3,3, a design incongruity is unlikely to occur on the sight surface 20 of the second upright 2B.

[0053] Next, the configuration of the panel support portion 21 and the indoor extension portion 22 of the second mullion 2B will be described in further detail with reference to FIG.

[0054] The panel support part 21 and the indoor extension part 22 of the second upright 2B are also divided into a left part 24 that forms the left side surface extending between the panel support part 21 and the indoor extension part 22, and a right part 26 that forms the right side surface extending between the panel support part 21 and the indoor extension part 22. The panel support part 21 and the indoor extension part 22 are formed by assembling the left part 24 and the right part 26 together.

[0055] The left part 24 of the second mullion 2B has the same configuration as the left part 24 of the first mullion 2A.

[0056] The right-side part 26 of the second upright 2B is formed with a right-side support surface 211b of the panel support portion 21, a panel accommodating groove 212b, a right-side side surface 221 of the indoor extension portion 22, and a step wall portion 214.

[0057] An end 26a on the outside side X1 of the right-side component 26 extends from the opening edge of the panel accommodating groove 212b towards the outside side X1. An outside visible wall portion 261 that protrudes towards the left-side component 24 is formed at this end 26a. The outside visible wall portion 261 is a portion that forms the visible surface 20 on the outside side X1 of the second mullion 2B, and extends along the up-and-down direction of the right-side component 26 (the direction perpendicular to the paper surface of FIG. 7). An outside engagement groove 261a that opens towards the left-side component 24 is formed at the tip edge of the outside visible wall portion 261.

[0058] An indoor side projection wall portion 262 that protrudes toward the left side component 24 is formed at the end portion 26b on the indoor side X2 of the right side component 26. The indoor side projection wall portion 262 extends in the vertical direction of the right side component 26 (perpendicular to the paper surface of FIG. 7) and forms a projection surface on the indoor side X2 of the indoor side extension portion 22 of the second mullion 2B. An indoor side engagement groove 262a that opens toward the left side component 24 is formed at the tip edge of the indoor side projection wall portion 262.

[0059] A pair of protrusions 263, 263 are formed on the bottom of the face material accommodating groove 212b of the right-side component 26. The pair of protrusions 263, 263 are arranged in parallel at a predetermined interval in the projection direction, and protrude from the bottom of the face material accommodating groove 212b toward the left-side component 24. The pair of protrusions 263, 263 extend in the up-down direction of the right-side component 26 (the direction perpendicular to the paper surface of FIG. 7).

[0060] The left part 24 and the right part 26 are assembled by engaging the outdoor projection 241 and the indoor projection 242 of the left part 24 with the outdoor engagement groove 261a and the indoor engagement groove 262a of the right part 26. Then, they are fastened by a screw 200a inserted from the surface material accommodating groove 212a of the left part 24 to the surface material accommodating groove 212b of the right part 26 and a screw 200b inserted between the indoor side projecting wall portion 262 of the right part 26 and the indoor side projection 242 of the left part 24. A pair of protrusions 263 of the right part 26 accommodates a pair of protrusions 243 of the left part 24. The protrusions 243 and the protrusions 263 engage with each other to prevent the left and right surface material accommodating grooves 212a and 212b from directly contacting each other. After the left part 24 and the right part 26 are assembled together in this manner, a decorative cover 23 is attached to the indoor side X2 surface of the indoor side extension part 22.

[0061] Next, the third stack 2C will be described.

[0062] In the third stack 2C shown in Fig. 8, the parts with the same reference numerals as those of the first stack 2A and the second stack 2B indicate parts with the same configuration. Therefore, the explanation of these parts refers to the explanation of the first stack 2A and the second stack 2B, and the following will explain the configurations that are different from those of the first stack 2A and the second stack 2B.

[0063] The third mullion 2C is also used when the left and right panel members 3,3 are arranged at an angle as shown in Fig. 8, and is used when the left and right panel members 3,3 are both arranged at an incline. In detail, the left and right panel members 3,3 are arranged at an incline at the same angle toward the room side X2 with respect to the mullion center line CL. The left and right panel members 3,3 are arranged side by side in the viewing direction so that the crossing angle as seen from the room side X2 is even smaller than that of the left and right panel members 3,3 in the second mullion 2B.

[0064] The panel support part 21 of the third mullion 2C has a support surface 211b, which is an inclined surface similar to the right support surface 211b of the panel support part 21 of the second mullion 2B, on both left and right sides, symmetrically. That is, the left and right support surfaces 211b, 211b are both inclined surfaces inclined toward the inside X2 of the mullion with respect to the mullion center line CL, centered on the end 211b1 of the outside X1. In detail, the support surfaces 211b, 211b are connected to the left and right edges of the visible surface 20 of the outside X1 of the panel support part 21. The inclined support surfaces 211b, 211b are formed flat except for the panel storage grooves 212a, 212b. The support surfaces 211b, 211b are linearly inclined so as to approach the mullion center line CL from the end 211b1, 211b1 of the outside X1 toward the inside extension part 22.

[0065] The ends 211b2, 211b2 on the indoor side X2 of the support surfaces 211b, 211b are closer to the mullion center line CL than the ends 221a, 221a on the outdoor side X1 of the left and right side surfaces 221, 221 of the indoor extension 22. The ends 211b2, 211b2 on the indoor side X2 of the support surfaces 211b, 211b and the ends 221a, 221a on the outdoor side X1 of the left and right side surfaces 221, 221 of the indoor extension 22 are connected by step walls 214, 214, respectively. As a result, the third mullion 2C has a shape in which both left and right side surfaces are concavely narrowed at the boundary between the surface material support 21 and the indoor extension 22. The support surfaces 211b, 211b and the step walls 214, 214 intersect at right angles.

[0066] The left and right support surfaces 211b, 211b of the third mullion 2C are arranged to intersect at right angles with the left and right panel members 3, 3, respectively. Therefore, the left and right panel members 3, 3 are inclined toward the room inside X2 with respect to the mullion center line CL according to the inclination angle of the support surfaces 211b, 211b. The left and right panel members 3, 3 are arranged to intersect so as to be more convex toward the room outside X1 than in the case of the second mullion 2B, corresponding to the inclination of the support surfaces 211b, 211b. In this way, the third mullion 2C forms a protruding corner portion in the curved wall 1.

[0067] The sight surface 20 of the outside side X1 of the third mullion 2C, like the sight surface 20 of the outside side X1 of the second mullion 2B, is composed of two faces 20a, 20b that intersect at the mullion center line CL. The two faces 20a, 20b also intersect so as to be convex toward the outside side X1 at the same intersection angle as the left and right panel members 3, 3. The left and right support faces 211b, 211b are symmetrical, so the two faces 20a, 20b intersect at the center of the sight surface 20 in the left-right direction.

[0068] Because the surface directions of the left and right panel members 3,3 are perpendicular to the left and right support surfaces 211b,211b, respectively, the end faces 4a of the bar 4 that abut against the left and right support surfaces 211b,211b, which are inclined surfaces, are machined perpendicular to the extension direction of the bar 4. Therefore, the bar 4 abuts against the support surfaces 211b,211b of the third upright 2C, respectively, at right angles. Because there is no need to machine the end faces 4a of the bar 4 at an angle to the extension direction of the bar 4 to match the inclination of the support surfaces 211b,211b, it is easy to machine the bar 4 that abuts against the third upright 2C that constitutes the projected corner portion.

[0069] The left and right support surfaces 211b, 211b, which are inclined surfaces, are inclined toward the mullion center line CL as they move from the ends 211b1, 211b1 of the support surfaces 211b, 211b on the outside side X1 toward the inside side X2, so that the left-right visibility width W3 of the sight surface 20 on the outside side X1 of the third mullion 2C is not significantly different from the visibility widths W1, W2 of the sight surface 20 on the outside side X1 of the first mullion 2A shown in Figure 4 and the second mullion 2B shown in Figure 6. Therefore, when looking at the third mullion 2C from the outside side X1, it is difficult to feel a change in the visibility width with the first mullion 2A and the second mullion 2B, and no sense of incongruity in design occurs.

[0070] The sight surface 20 on the outside side X1 of the third mullion 2C is formed by two surfaces 20a, 20b that intersect at an angle similar to the intersection angle of the left and right panel materials 3,3. Therefore, as with the second mullion 2B, even if the line of sight moves from the outside side X1 to the left and right panel materials 3,3, there is little chance of a design incongruity in the sight surface 20 of the third mullion 2C.

[0071] Next, the configuration of the panel support portion 21 and the indoor extension portion 22 of the third mullion 2C will be described in further detail with reference to FIG.

[0072] The panel support part 21 and the indoor extension part 22 of the third upright 2C are also divided into a left part 27 that forms the left side surface extending between the panel support part 21 and the indoor extension part 22, and a right part 28 that forms the right side surface extending between the panel support part 21 and the indoor extension part 22. The panel support part 21 and the indoor extension part 22 are formed by assembling the left part 27 and the right part 28 together.

[0073] The left side part 27 of the third upright 2C is formed with a left support surface 211b of the panel support portion 21, a panel accommodating groove 212a, a right side surface 221 of the indoor extension portion 22, and a step wall portion 214.

[0074] An end 27a on the outdoor side X1 of the left part 27 extends from the opening edge of the panel accommodating groove 212b toward the outdoor side X1. An outdoor side protrusion 271 that protrudes toward the right part 28 is formed on this end 27a. The outdoor side protrusion 271 extends along the up-down direction of the left part 27 (the direction perpendicular to the paper surface of FIG. 9).

[0075] An indoor side protrusion 272 that protrudes toward the right side component 28 is formed on the end 27b of the left side component 27 on the indoor side X2. The indoor side protrusion 272 extends along the up-down direction of the left side component 27 (the direction perpendicular to the paper surface of FIG. 9).

[0076] A pair of protrusions 273, 273 are formed on the bottom of the face material accommodating groove 212a of the left component 27. The pair of protrusions 273, 273 are arranged in parallel at a predetermined interval in the projection direction, and protrude from the bottom of the face material accommodating groove 212b toward the right component 28. The pair of protrusions 273, 273 extend in the up-down direction of the left component 27 (the direction perpendicular to the paper surface of FIG. 9).

[0077] The right-side part 28 of the third upright 2C is formed with a right-side support surface 211b of the panel support portion 21, a panel accommodating groove 212b, a right-side side surface 221 of the indoor extension portion 22, and a step wall portion 214.

[0078] An end 28a on the outside side X1 of the right-side component 28 extends from the opening edge of the panel accommodating groove 212b towards the outside side X1. An outside visible wall portion 281 that protrudes towards the left-side component 27 is formed at this end 28a. The outside visible wall portion 281 is a portion that forms the visible surface 20 on the outside side X1 of the third mullion 2C, and extends along the up-and-down direction of the right-side component 28 (the direction perpendicular to the paper surface of FIG. 9). An outside engagement groove 281a that opens towards the left-side component 27 is formed at the tip edge of the outside visible wall portion 281.

[0079] An indoor side projection wall portion 282 that protrudes toward the left side component 27 is formed at the end portion 28b of the indoor side X2 of the right side component 28. The indoor side projection wall portion 282 extends in the vertical direction of the right side component 28 (perpendicular to the paper surface of FIG. 9) and forms a projection surface on the indoor side X2 of the indoor side extension portion 22 of the third mullion 2C. An indoor side engagement groove 282a that opens toward the left side component 27 is formed at the tip edge of the indoor side projection wall portion 282.

[0080] A seat 283, through which the screw 200a passes, is formed at the bottom of the face material accommodating groove 212b of the right-side component 28. The seat 283 protrudes in a T-shape from the bottom of the face material accommodating groove 212b toward the left-side component 27. The seat 283 extends along the up-down direction of the right-side component 28 (the direction perpendicular to the paper surface of FIG. 9).

[0081] The left part 27 and the right part 28 are assembled by engaging the outdoor projection 271 and the indoor projection 272 of the left part 27 with the outdoor engagement groove 281a and the indoor engagement groove 282a of the right part 28. Then, they are fastened by the screws 200a and 200b. The screw 200a is inserted from the surface material receiving groove 212a of the left part 27 toward the right part 28, and penetrates the base portion 283 arranged to face the insertion direction of the screw 200a. The screw 200b is inserted between the indoor side visible wall portion 282 of the right part 28 and the indoor side projection 272 of the left part 27. The protrusions 273 and 273 abut against the base portion 283, preventing the left and right surface material receiving grooves 212a and 212b from directly contacting each other. After the left part 27 and the right part 28 are assembled together in this manner, the decorative cover 23 is attached to the indoor side X2 surface of the indoor side extension part 22.

[0082] Next, the fourth azimuth 2D will be described.

[0083] In the fourth mullion 2D shown in Fig. 10, parts with the same symbols as those of the first mullion 2A, the second mullion 2B and the third mullion 2C indicate parts with the same configuration. Therefore, the explanations of these parts refer to the explanations of the first mullion 2A, the second mullion 2B and the third mullion 2C, and the following describes the configurations that differ from those of the first mullion 2A, the second mullion 2B and the third mullion 2C.

[0084] The fourth mullion 2D is also used when the left and right panel members 3,3 are arranged at an angle, as shown in Fig. 10. In detail, the panel member 3 on the left side of the fourth mullion 2D is arranged at an angle to the panel member 3 on the right side. The panel member 3 on the right side is arranged at an angle of 90° to the mullion center line CL, while the panel member 3 on the left side is arranged at an angle to the room side X2 to the mullion center line CL. In other words, the left and right panel members 3,3 are arranged side by side in the viewing direction so as to intersect at an angle smaller than 180° when viewed from the room side X2, similar to the left and right panel members 3,3 of the second mullion 2B.

[0085] The external shape of the fourth mullion 2D is symmetrical to the external shape of the second mullion 2B. That is, the panel support portion 21 in the fourth mullion 2D has left and right support surfaces 211b, 211a that abut the end faces 4a of the lattice members 4 arranged on the left and right of the fourth mullion 2D.

[0086] The support surface 211a located on the right side in Figure 10 is parallel to the upright center line CL, similar to the support surface 211a on the right side of the first upright 2A shown in Figure 4, and is flush and continuous with the right side surface 221 of the indoor extension portion 22 without any steps.

[0087] The support surface 211b arranged on the left side in Fig. 10 is an inclined surface inclined toward the inside X2 of the mullion with respect to the mullion center line CL, centered on the end 211b1 of the outside X1 of the support surface 211b, similar to the right support surface 211b of the second mullion 2B shown in Fig. 6 and the left and right support surfaces 211b, 211b of the third mullion 2C shown in Fig. 8. In detail, the end 211b1 of the outside X1 of the support surface 211b, which is an inclined surface, is connected to the left edge of the visible surface 20 of the outside X1 of the fourth mullion 2D. The support surface 211b, which is an inclined surface, is formed flat except for the surface material receiving groove 212a. The support surface 211b is linearly inclined so as to approach the mullion center line CL from the end 211b1 of the outside X1 toward the inside extension 22.

[0088] The end 211b2 on the indoor side X2 of the support surface 211b is closer to the mullion center line CL than the end 221a on the outdoor side X1 of the left side surface 221 of the indoor extension 22. The end 211b2 on the indoor side X2 of the support surface 211b and the end 221a on the outdoor side X1 of the left side surface 221 of the indoor extension 22 are connected by a step wall portion 214. As a result, the fourth mullion 2D has a concave shape on the support surface 211b side at the boundary between the panel support portion 21 and the indoor extension 22. The support surface 211b and the step wall portion 214 intersect at a right angle.

[0089] The support surface 211b of the fourth mullion 2D is arranged to intersect at a right angle with the left panel 3 in FIG. 10. Therefore, the left panel 3 is inclined toward the room inside X2 with respect to the mullion center line CL according to the inclination angle of the support surface 211b. The left and right panel materials 3, 3 are arranged to intersect so as to be convex toward the room outside X1, similar to the second mullion 2B, in accordance with the inclination of the support surface 211b. In this way, the fourth mullion 2D forms a protruding corner portion of the curved wall 1.

[0090] The visible surface 20 of the fourth mullion 2D on the outdoor side X1 is composed of two surfaces 20a, 20b that intersect at the mullion center line CL. The surface 20a arranged on the left side of the mullion center line CL is arranged at a right angle to the left support surface 211b and is arranged parallel to the surface direction of the surface material 3 supported by the support surface 211b. The surface 20b arranged on the right side of the mullion center line CL is arranged at a right angle to the right support surface 211a and is arranged parallel to the surface direction of the surface material 3 supported by the support surface 211a. Therefore, the two surfaces 20a, 20b intersect so as to be convex toward the outdoor side X1 at the same intersection angle as the left and right surface materials 3, 3.

[0091] Because the surface directions of the left and right panel members 3,3 are perpendicular to the left and right support surfaces 211b, 211a, respectively, the end face 4a of the lattice member 4 that abuts the inclined left support surface 211b is machined perpendicular to the extension direction of the lattice member 4, just like the lattice member 4 that abuts the right support surface 211a, which is not an inclined surface. Therefore, the lattice member 4 abuts perpendicularly to the support surfaces 211b, 211a of the fourth mullion 2D, respectively. Because there is no need to machine the end face 4a of the lattice member 4 at an angle to the extension direction of the lattice member 4 to match the inclination of the support surfaces 211b, 211a, the lattice member 4 that abuts the fourth mullion 2D that constitutes the projected corner portion can be easily machined.

[0092] The left support surface 211b, which is an inclined surface, is inclined toward the mullion center line CL from the end 211b1 of the support surface 211b on the outside side X1 toward the inside side X2, so that the left-right visibility width W4 of the sight surface 20 of the outside side X1 of the fourth mullion 2D is not significantly different from the left-right visibility widths W1, W2, W3 of the sight surface 20 of the outside side X1 of the first mullion 2A shown in Fig. 4, the second mullion 2B shown in Fig. 6, and the third mullion 2C shown in Fig. 8. Therefore, when the fourth mullion 2D is viewed from the outside side X1, the change in the visibility width with the first mullion 2A, the second mullion 2B, and the third mullion 2C is hardly felt, and no sense of incongruity in design occurs.

[0093] The sight surface 20 on the outside side X1 of the fourth mullion 2D is also formed by two surfaces 20a, 20b that intersect at an angle similar to the intersection angle of the left and right panel materials 3,3. Therefore, as with the second mullion 2B and the third mullion 2C, even if the line of sight moves from the outside side X1 to the left and right panel materials 3,3, there is little chance of a design incongruity on the sight surface 20 of the fourth mullion 2D.

[0094] Next, the configuration of the panel support portion 21 and the indoor extension portion 22 of the fourth mullion 2D will be described in further detail with reference to FIG.

[0095] The panel support part 21 and the indoor extension part 22 of the fourth upright 2D are also divided into a left part 27 that forms the left side surface extending between the panel support part 21 and the indoor extension part 22, and a right part 29 that forms the right side surface extending between the panel support part 21 and the indoor extension part 22. The panel support part 21 and the indoor extension part 22 are formed by assembling the left part 27 and the right part 29 together.

[0096] The left part 27 of the fourth mullion 2D has the same configuration as the left part 27 of the third mullion 2C.

[0097] The right-side part 29 of the fourth upright 2D is formed with a right-side support surface 211a of the panel support part 21, a panel accommodating groove 212b, and a right-side side surface 221 of the indoor extension part 22 that is flush with the support surface 211a without any steps.

[0098] An end 29a on the outside side X1 of the right-side component 29 extends from the opening edge of the panel accommodating groove 212b towards the outside side X1. An outside visible wall portion 291 that protrudes towards the left-side component 27 is formed at this end 29a. The outside visible wall portion 291 is a portion that forms the visible surface 20 on the outside side X1 of the fourth mullion 2D, and extends along the up-and-down direction of the right-side component 29 (the direction perpendicular to the paper surface of FIG. 11). An outside engagement groove 291a that opens towards the left-side component 27 is formed at the tip edge of the outside visible wall portion 291.

[0099] An indoor side projection wall portion 292 that protrudes toward the left side component 27 is formed at the end portion 29b of the indoor side X2 of the right side component 29. The indoor side projection wall portion 292 extends in the vertical direction of the right side component 29 (perpendicular to the paper surface of FIG. 11) and forms a projection surface of the indoor side X2 of the indoor side extension portion 22 of the fourth mullion 2D. An indoor side engagement groove 292a that opens toward the left side component 27 is formed at the tip edge of the indoor side projection wall portion 292.

[0100] A pair of protrusions 293, 293 are formed on the bottom of the face material accommodating groove 212b of the right-side component 29. The pair of protrusions 293, 293 are arranged in parallel at a predetermined interval in the projection direction, and protrude from the bottom of the face material accommodating groove 212b toward the left-side component 27. The pair of protrusions 293, 293 extend in the up-down direction of the right-side component 29 (the direction perpendicular to the paper surface of FIG. 11).

[0101] The left part 27 and the right part 29 are assembled by engaging the outdoor projection 271 and the indoor projection 272 of the left part 27 with the outdoor engagement groove 291a and the indoor engagement groove 292a of the right part 29. Then, they are fastened by a screw 200a inserted from the surface material housing groove 212a of the left part 27 to the surface material housing groove 212b of the right part 25 and a screw 200b inserted between the indoor side projection wall 252 of the right part 25 and the indoor side projection 242 of the left part 24. A pair of projections 243, 243 of the left part 24 is accommodated between the pair of projections 253, 253 of the right part 25. The projections 243, 243 and the projections 253, 253 engage with each other to prevent the left and right surface material housing grooves 212a, 212b from directly contacting each other. After the left part 27 and the right part 29 are assembled together in this manner, the decorative cover 23 is attached to the indoor side X2 surface of the indoor side extension part 22.

[0102] When forming the curved wall 1 of this embodiment, the first mullion 2A is used in the area supporting the left and right panel materials 3,3 that intersect at an angle of 180°. Depending on the intersection angle of the left and right panel materials 3,3, as viewed from the inside side X2, one of the second mullion 2B, third mullion 2C, and fourth mullion 2D is used in the area supporting the left and right panel materials 3,3 that intersect at an angle of less than 180°. In this way, as shown in Figure 1, the curved wall 1 is formed having a curved portion that is convex toward the outside side X1.

[0103] In the second mullion 2B, third mullion 2C, and fourth mullion 2D constituting the curved portion of the curved wall 1 of this embodiment, like the first mullion 2A, the end faces 4a of the mullion 4 that abut against the left and right support surfaces 211a, 211b are machined perpendicular to the extension direction of the mullion 4. Therefore, the screws 201 that fix each mullion 4 to the support surfaces 211a, 211b are driven from the inside of the second mullion 2B, third mullion 2C, and fourth mullion 2D along the extension direction of the mullion 4 so as to be perpendicular to the support surfaces 211a, 211b, as shown in Figures 12 to 14.

[0104] The interlocking material 4 is pre-fixed by driving screws 201 into the support surfaces 211a, 211b of each part 24, 25, 26, 27, 28 from the inner side before the left side parts 24, 27 and right side parts 25, 26, 28 which respectively constitute the first mullion 2A, the second mullion 2B, the third mullion 2C and the fourth mullion 2D are assembled together.

[0105] The curved wall 1 described above has a curved portion that is convex toward the outside side X1, and the second mullion 2B, the third mullion 2C, and the fourth mullion 2D used in the curved portion form an outward corner portion of the curved wall 1, but the mullion 2 may form an inward corner portion of the curved wall. In this case, the curved wall has a curved portion that is convex toward the inside side X2.

[0106] Fig. 15 shows the fifth mullion 2E used when forming a recessed corner. The parts with the same symbols as the first mullion 2A, the second mullion 2B, the third mullion 2C, and the fourth mullion 2D indicate parts with the same configuration. Therefore, the above explanations are used for these explanations, and the following explains the different configurations.

[0107] The left and right panels 3, 3 of the fifth mullion 2E are arranged at the same angle inclined toward the outside X1 with respect to the mullion center line CL. That is, the left and right panels 3, 3 are arranged side by side in the view direction so as to intersect at an angle smaller than 180° when viewed from the outside X1.

[0108] The panel support part 21 in the fifth mullion 2E has the support surface 211c, which is an inclined surface, symmetrically on both the left and right sides. That is, the left and right support surfaces 211c, 211c are both inclined surfaces inclined toward the outside X1 with respect to the mullion center line CL, centered on the end 211c1, 211c1 on the outside X1. In detail, the support surface 211c, 211c is connected to the left and right edges of the visible surface 20 on the outside X1 of the panel support part 21. The support surface 211c, 211c, which is an inclined surface, is formed flat except for the panel accommodation grooves 212a, 212b. The support surface 211c, 211c is inclined linearly away from the mullion center line CL from the end 211c1, 211c1 on the outside X1 toward the indoor extension part 22.

[0109] The end portions 211c2, 211c2 on the indoor side X2 of the support surfaces 211c, 211c are farther from the mullion center line CL than the end portions 221a, 221a on the outdoor side X1 of the left and right side surfaces 221, 221 of the indoor extension 22. The end portions 211c2, 211c2 on the indoor side X2 of the support surfaces 211c, 211c and the end portions 221a, 221a on the outdoor side X1 of the left and right side surfaces 221, 221 of the indoor extension 22 are connected by step walls 215, 215, respectively. As a result, the fifth mullion 2E has a shape in which both left and right side surfaces protrude in a convex shape at the boundary between the surface material support portion 21 and the indoor extension 22. The support surfaces 211c, 211c and the step walls 215, 215 intersect at right angles.

[0110] The left and right support surfaces 211b, 211b of the fifth mullion 2E are arranged to intersect at right angles with the left and right panel members 3, 3, respectively. Therefore, the left and right panel members 3, 3 are inclined toward the outside side X1 with respect to the mullion center line CL according to the inclination angle of the support surfaces 211c, 211c. The left and right panel members 3, 3 are arranged to intersect so as to be concave toward the outside side X1, corresponding to the inclination of the support surfaces 211c, 211c. As a result, the fifth mullion 2E forms an internal corner portion in the curved wall 1.

[0111] The end faces 4a of the lattice wood 4 that abut against the support faces 211c, 211c of the fifth mullion 2E are also machined perpendicular to the extension direction of the lattice wood 4. Therefore, the lattice wood 4 abuts against the support faces 211c, 211c of the fifth mullion 2E at right angles, respectively. Since there is no need to machine the end faces 4a of the lattice wood 4 at an incline relative to the extension direction of the lattice wood 4 to match the inclination of the support faces 211c, 211c, the lattice wood 4 that abuts against the fifth mullion 2E can be easily machined.

[0112] The left and right support surfaces 211c, 211c, which are inclined surfaces, are inclined away from the mullion center line CL as they move from the ends 211c1, 211c1 of the support surfaces 211c, 211c on the outside X1 to the inside X2, so that the left-right visibility width W5 of the sight surface 20 of the outside X1 of the fifth mullion 2E is not significantly different from the left-right visibility widths W1, W2, W3, W4 of the sight surface 20 of the outside X1 of the first mullion 2A shown in Fig. 4, the second mullion 2B shown in Fig. 6, the third mullion 2C shown in Fig. 8, and the fourth mullion 2D shown in Fig. 10. Therefore, when the fifth mullion 2E is viewed from the outside X1, the change in the visibility width with the first mullion 2A, the second mullion 2B, the third mullion 2C, and the fourth mullion 2D is not easily felt, and no sense of incongruity in design occurs.

[0113] The sight surface 20 on the outside side X1 of the fifth upright 2E is also formed by two surfaces 20a, 20b that intersect at an angle similar to the intersection angle of the left and right panel materials 3,3, so that even when the line of sight is moved from the outside side X1 to the left and right panel materials 3,3, there is little chance of a design incongruity occurring on the sight surface 20 of the fifth upright 2E.

[0114] The panel support portion 21 and the indoor extension portion 22 of the fifth mullion 2E are also constructed by assembling the left and right parts together, similar to the first mullion 2A, the second mullion 2B, the third mullion 2C, and the fourth mullion 2D. The specific configurations of these are the same as those of the third mullion 2C, except for the inclination angle of the support surfaces 211c, 211c, so a description thereof will be omitted.

[0115] The interlocking member 4 in contact with the support faces 211c, 211c of the fifth mullion 2E is fixed in the same manner as the fixing structure of the interlocking member 4 shown in Figs.

[0116] The mullion 2 constituting the recessed corner is not limited to the shape of the fifth mullion 2E. When the mullion 2 constituting the recessed corner is arranged such that either one of the left and right panel members 3, 3 intersects at a right angle with the mullion center line CL, like the second mullion 2B and the fourth mullion 2D, either the left or right support surface of the panel support portion 21 is formed so as to be continuous and flush with the side surface 221 of the indoor extension portion 22.

[0117] The inclination angles of the support surfaces 211b, 211c, which are inclined surfaces formed on the mullion 2, are not limited to those described above. The mullion 2 may include many more types of mullions in which the inclination angles of the support surfaces 211b, 211c, which are inclined surfaces, are variously different. This makes it possible to configure the curved wall 1 having curved surface portions with various curvatures.

[0118] According to the mullions 2 of the present embodiment described above, the following effects are achieved.

[0119] (1) The mullions 2 (second mullions 2B, third mullions 2C, fourth mullions 2D and fifth mullions 2E) separate the outside area X1 from the inside area X2 and support left and right panel materials 3, 3 arranged at an angle, and are equipped with a panel material support part 21 that supports the left and right panel materials 3, 3, and an indoor extension part 22 that is continuous with the panel material support part 21 and extends toward the indoor side X2, the panel material support part 21 has left and right support surfaces (support surfaces 211a, 211b, 211c) that face the side ends 3a, 3a of the left and right panel materials 3, 3, respectively, and panel material accommodating grooves 212a, 212b that are provided on the left and right support surfaces, respectively, and accommodate the side ends 3a, 3a of the left and right panel materials 3, 3, and at least one of the left and right support surfaces is an inclined surface that is inclined about the end 211b1, 211c1 of the outside area X1 with respect to the panel center line CL along the projection direction.

[0120] According to the above (1), the left and right panel materials 3, 3 can be supported at an angle by the support surface (support surface 211a, 211b, 211c) which is the inclined surface of the panel support portion 21. Since the support surface is inclined with respect to the end portion 211b1, 211c1 of the outside X1 with respect to the mullion center line CL, the visible width of the outside X1 of the mullions 2, 2B, 2C, 2D, 2E does not change significantly compared to the case where the inclined support surface is not present, and there is no sense of incongruity in terms of design. Therefore, it is possible to provide the mullions 2, 2B, 2C, 2D, 2E which can support the left and right panel materials 3, 3 at an angle and improve the design of the appearance at the same time.

[0121] Furthermore, since the uprights 2, 2B, 2C, 2D, and 2E have an indoor extension portion 22, the uprights 2, 2B, 2C, 2D, and 2E can be fixed to the building structure on the indoor side X2 of the panel support portion 21 without affecting the support of the panel 3,3.

[0122] (2) In the mullion described in (1) above, the inclined surface is inclined so as to approach the mullion center line CL from the ends 211b1, 211c1 on the outside side X1 toward the inside side X2.

[0123] According to the above (2), it is possible to form a corner portion that convexly extends toward the outside side X1 while simultaneously supporting the left and right panel members 3, 3 at an angle and improving the exterior design.

[0124] (3) In the mullion described in (1) above, the inclined surface is inclined so as to move away from the mullion center line CL from the ends 211b1, 211c1 on the outside side X1 toward the inside side X2.

[0125] According to the above (3), it is possible to form a recessed corner portion that is recessed toward the outside side X1, while simultaneously supporting the left and right panel members 3, 3 at an angle and improving the exterior design.

[0126] (4) In the upright described in any of (1) to (3) above, the indoor extension 22 extends parallel to the upright center line CL from the panel support portion 21 toward the indoor side X2, and the inclined surface and the indoor extension 22 are connected by step wall portions 214, 215.

[0127] According to (4) above, the visible width of the interior side X2 of the uprights 2, 2B, 2C, 2D, and 2E does not change, so that the design of each upright 2, 2B, 2C, 2D, and 2E when viewed from the interior side X2 is also improved.

[0128] (5) In the upright described in any of (1) to (4) above, it is divided into left parts 24, 27 which form the left side surface extending between the panel support part 21 and the indoor extension part 22, and right parts 25, 26, 28, 29 which form the right side surface extending between the panel support part 21 and the indoor extension part 22, and is formed by combining the left parts 24, 27 and the right parts 25, 26, 28, 29.

[0129] According to (5) above, the left side parts 24, 27 and the right side parts 25, 26, 28, 29 can be appropriately selected and combined depending on the angle between the left and right panel materials 3, 3, so that mullions 2, 2B, 2C, 2D, 2E having inclined surfaces with the desired inclination angle can be easily formed.

[0130] (6) In the mullion described in any of (1) to (5) above, the length in the projection direction of the inclined surface is greater than or equal to the length in the projection direction of the interlocking material 4 abutting the inclined surface, and the inclined surface constitutes an abutment surface against which the interlocking material 4 abuts at a right angle.

[0131] According to the above (6), the interlocking material 4 can be attached by abutting it on the inclined surface at a right angle. Since the end face 4a of the interlocking material 4 can be machined at a right angle, the interlocking material 4 can be easily machined. [Explanation of symbols]

[0132] 2 mullion, 2B second mullion, 2C third mullion, 2D fourth mullion, 2E fifth mullion, 21 surface material support portion, 211b, 211c support surface (inclined surface), 211b1, 211c1 exterior end portion, 212a, 212b surface material receiving groove, 214, 215 stepped wall portion, 22 interior extension portion, 24, 27 left side part, 25, 26, 28, 29 right side part, 3 surface material, 3a side end portion of surface material, 4 lattice member, CL mullion center line, X1 exterior side, X2 interior side

Claims

1. A mullion that separates the outside and inside of the room and supports the left and right panel members arranged at an angle, A surface material support portion that supports the left and right surface materials; An indoor extension portion extending toward the indoor side continuous with the surface material support portion, The panel support portion has left and right support surfaces that face the side ends of the left and right panel members, respectively; a surface material accommodation groove provided on each of the left and right support surfaces and configured to accommodate the side ends of the left and right surface materials; A mullion in which at least one of the left and right support surfaces is an inclined surface that is inclined about the outside end of the mullion with respect to the center line of the mullion along the projection direction.

2. The upright of claim 1 , wherein the inclined surface is inclined so as to approach the upright center line as it moves from the outside end toward the inside of the room.

3. The upright of claim 1 , wherein the inclined surface is inclined so as to move away from the upright center line as it moves from the end on the outside of the room toward the inside of the room.

4. The indoor extension portion extends from the surface material support portion toward the indoor side parallel to the upright center line, A post as claimed in any one of claims 1 to 3, wherein the inclined surface and the indoor extension are connected by a step wall portion.

5. A support structure as described in any one of claims 1 to 3, which is divided into a left part forming a left side surface extending between the panel support portion and the indoor extension portion, and a right part forming a right side surface extending between the panel support portion and the indoor extension portion, and is formed by combining the left part and the right part.

6. A post as described in any one of claims 1 to 3, wherein the length of the inclined surface in the projecting direction is greater than or equal to the length of the interlocking material abutting the inclined surface in the projecting direction, and the inclined surface constitutes an abutment surface against which the interlocking material abuts at a right angle.

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