Corner mullion

Abstract

To provide a compact corner mullion with flame cutoff performance.SOLUTION: A corner mullion 20 includes: a first half body 35 provided at an end part in a horizontal direction of a first sash 100 and having a shape obtained by vertically splitting a cylinder; a second half body 36 provided at an end part in a horizontal direction of a second sash 200 arranged orthogonally to the first sash 100, having a shape obtained by vertically splitting the cylinder, and assembled with the first half body 35 so as to form the cylinder; a first refractory material 51 attached on an inside of the first half body 35 and extending vertically; and a second refractory material 52 attached on an inside of the second half body 36 and extending vertically to be attached on the first refractory material 51.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] When multiple sashes are lined up horizontally and installed in an opening in the building frame, mullions are provided between the windows as crosspieces. Patent Document 1 discloses a technique for making the mullions fire-resistant. Patent Document 2 discloses a technique in which an opening is formed in a corner of the building frame, two sashes are installed in the opening at a right angle, and a corner mullion is provided at the corner formed by the sashes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-1120 [Patent Document 2] Jikko No. 63-17811 Summary of the Invention [Problem to be solved by the invention]

[0004] However, corner mullions are required to have fire resistance so that flames do not pass through them in the event of an outdoor or indoor fire. If the fire-resistant structure of Patent Document 1 is applied to a corner mullion, even if the corner mullion has high fire resistance, its size will be large, and the cost and labor required to manufacture and install the corner mullion will be high. Furthermore, a large corner mullion will detract from the design of the building and sash.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a compact corner mullion that has flame blocking properties. [Means for solving the problem]

[0006] According to one aspect of the present invention, in order to solve the above problem, a corner mullion is provided, comprising: a first half body provided at the horizontal end of a first sash and having the shape of a tube split vertically; a second half body provided at the horizontal end of a second sash arranged perpendicular to the first sash, having the shape of the tube split vertically and assembled to the first half body to form the tube; a first fire-resistant material attached to the first half body and extending vertically; and a second fire-resistant material attached to the second half body, extending vertically and joined to the first fire-resistant material. [Effects of the Invention]

[0007] According to one aspect of the present invention, the first and second fire-resistant materials are housed inside a tube formed by assembling the second half body to the first half body. This makes it difficult for flames to pass through the corner mullion during an outdoor or indoor fire, and the corner mullion is compact. The joining of the second fire-resistant material to the first fire-resistant material contributes to improving the flame-blocking performance of the corner mullion. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 shows a schematic diagram of a corner sash. [Figure 2] Figure 2 shows a cross section of a corner mullion. [Figure 3] Figure 3 shows a cross section of an exploded corner mullion. [Figure 4] Figure 4 shows the installation of the lower part of the corner mullion. [Figure 5] FIG. 5 shows a plane taken along line VV in FIG. [Figure 6] FIG. 6 shows a plane taken along line VI-VI in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. Because the drawings are provided for illustrative purposes only, the scope of the present invention is not limited to the examples shown in the drawings.

[0010] [1. Building frame and corner sash] 1 is an interior view that schematically shows a corner sash 10 attached to a building skeleton 1. This corner sash 10 is attached to an opening 2 formed in a corner of the building skeleton 1 and installed.

[0011] Here, a first exterior wall 5 and a second exterior wall 6 constitute the building's skeleton 1. The exterior walls 5, 6 are butted together at a right angle, forming an inside corner indoors and an outside corner outdoors. An opening 2 is formed between the exterior walls 5, 6 and their corner. Of the opening 2, a portion 3 formed in the first exterior wall 5 is rectangular, and a portion 4 formed in the second exterior wall 6 is rectangular. Portion 3 is referred to as the first half-opening 3, and portion 4 is referred to as the second half-opening 4. Figure 1 shows arrows representing the first sight direction, first sight direction, second sight direction, and second sight direction. The first sight direction refers to the direction parallel to the first exterior wall 5, and the first sight direction refers to the direction perpendicular to the first sight direction and the thickness direction of the first exterior wall 5. The second sight direction refers to a direction parallel to the second outer wall 6, and the second prospective direction refers to a direction perpendicular to the second sight direction and the thickness direction of the second outer wall 6. The first sight direction and the second prospective direction are parallel to each other, and the first sight direction and the second sight direction are parallel to each other. The sight direction is also called the in-plane direction, and the prospective direction is also called the out-of-plane direction.

[0012] The corner sash 10 includes a first sash 100, a second sash 200, a third sash 300, a mullion 400, and a corner mullion 20. The corner sash 10 is a continuous window sash in which the first sash 100, the second sash 200, and the third sash 300 are connected together.

[0013] The first sash 100 is a fixed window shaped like a rectangle. The first sash 100 comprises a rectangular sash frame 101 and a window body 110. The sash frame 101 has left and right vertical frames 102, 103 that extend vertically and parallel to each other, and upper and lower horizontal frames 104, 105 that extend horizontally and parallel to each other. The sash frame 101 is assembled into a frame shape from these vertical frames 102, 103 and horizontal frames 104, 105. The vertical frame 103 is one end of the first sash 100 in the horizontal direction, and the vertical frame 102 is the other end of the first sash 100 in the horizontal direction. The window body 110 comprises a single-pane glass plate or a double-pane glass plate. The window body 110 is fitted into the sash frame 101 and fixed to the sash frame 101. The first sash 100 may be an openable / closable window such as a vertical sliding window, a horizontal sliding window, a casement window, an outward-tilting window, an inward-tilting window, a projection window, a louver window, an awning window, etc. In this case, the window body 110 is opened and closed manually or automatically.

[0014] The second sash 200 is a fixed window shaped like a rectangle. The second sash 200 includes a rectangular sash frame 201 and a window body 210. The sash frame 201 includes left and right vertical frames 202, 203 that extend vertically and parallel to each other, and upper and lower horizontal frames 204, 205 that extend horizontally and parallel to each other. The sash frame 201 is assembled into a frame shape from the vertical frames 202, 203 and the horizontal frames 204, 205. The vertical frame 202 is one end of the second sash 200 in the horizontal direction, and the vertical frame 203 is the other end of the second sash 200 in the horizontal direction. The window body 210 includes a single-pane glass plate or a double-pane glass plate. The window body 210 is fitted into the sash frame 201 and fixed to the sash frame 201. The second sash 200 may be an openable / closable window such as a vertical sliding window, a horizontal sliding window, a casement window, an outward-tilting window, an inward-tilting window, a projection window, a louver window, an awning window, etc. In this case, the window body 210 is opened and closed manually or automatically.

[0015] The third sash 300 is a rectangular openable / closable window, specifically a vertical sliding window. The third sash 300 comprises a rectangular sash frame 301 and a window body 310. The sash frame 301 has left and right vertical frames 302, 303 that extend vertically and parallel to each other, and upper and lower horizontal frames 304, 305 that extend horizontally and parallel to each other. The sash frame 301 is assembled into a frame shape from the vertical frames 302, 303 and the horizontal frames 304, 305. The window body 310 has single-pane or double-pane glass panes. The window body 310 is fitted into the sash frame 301 and is attached to the sash frame 301 via a vertical sliding opening / closing mechanism so as to be able to open and close. The third sash 300 may be an openable / closable window other than a vertical sliding window, such as a horizontal sliding window, a casement window, an outward-tilting window, an inward-tilting window, a projection window, a louver window, an awning window, etc. The third sash 300 may also be a fixed window.

[0016] The first sash 100 and the second sash 200 are arranged at a right angle. The vertical frames 103 of the first sash 100 and the vertical frames 202 of the second sash 200 are arranged close to each other and parallel to each other. The vertical frames 102 of the first sash 100 and the vertical frames 203 of the second sash 200 are arranged apart from each other and parallel to each other. The upper horizontal frames 104, 204 of the sashes 100, 200 are arranged at a right angle, and the lower horizontal frames 105, 205 are arranged at a right angle.

[0017] The corner mullion 20 is disposed at the corner formed by the first and second sashes 100, 200 and extends vertically. The corner mullion 20 is disposed along the vertical frames 103, 202 of the sashes 100, 200 and is integrated with these vertical frames 103, 202. The corner mullion 20 is disposed at a right angle to the upper horizontal frame 104 of the first sash 100, and the corner mullion 20 is disposed at a right angle to the lower horizontal frame 105. The corner mullion 20 is disposed at a right angle to the upper horizontal frame 204 of the second sash 200, and the corner mullion 20 is disposed at a right angle to the lower horizontal frame 205. Of the vertical frames 102, 103 of the first sash 100, the vertical frame 103 is proximal to the corner mullion 20, and the vertical frame 102 is distal to the corner mullion 20. Of the vertical frames 202 and 203 of the second sash 200, the vertical frame 202 is proximal to the corner mullion 20 and the vertical frame 203 is distal from the corner mullion 20.

[0018] The second and third sashes 200, 300 face in the same direction and are arranged side by side with a mullion 400 between them. The ends of the upper horizontal frames 204, 304 of the sashes 200, 300 butt against each other with the upper end of the mullion 400 between them, so that the horizontal frames 204, 304 are arranged in a horizontal line. The lower horizontal frames 205, 305 of the sashes 200, 300 butt against each other with the lower end of the mullion 400 between them, so that the horizontal frames 205, 305 are arranged in a horizontal line. The mullion 400 extends vertically between the vertical frame 203 of the second sash 200 and the vertical frame 302 of the third sash 300. The mullion 400 is integrated with the vertical frames 203, 302 of the sashes 200, 300. The mullion 400 is fire-resistant.

[0019] The corner sash 10, which is formed by assembling the first sash 100 and the second and third sashes 200, 300 at right angles, is attached to the opening 2 as follows.

[0020] The first sash 100 is oriented in a first projection direction and fitted into the first partial opening 3. The first sash 100 being oriented in the first projection direction means that the normal to the window body 110 of the first sash 100 is parallel to the first projection direction.

[0021] The upper horizontal frame 104 of the first sash 100 is secured to the first half opening 3 along its upper edge. The lower horizontal frame 105 of the first sash 100 is secured to the first half opening 3 along its lower edge. The vertical frame 102 of the first sash 100 is secured to the first half opening 3 along its vertical edge.

[0022] The second and third sashes 200, 300 are oriented in a second prospective direction and fitted into the second half opening 4. The upper horizontal frames 204, 304 of the sashes 200, 300 are secured to the second half opening 4 along its upper edge. The lower horizontal frames 205, 305 of the sashes 200, 300 are secured to the second half opening 4 along its lower edge. The vertical frame 303 of the third sash 300 is secured to the second half opening 4 along its vertical edge.

[0023] The corner mullions 20 are arranged at the boundary between the first half opening 3 and the second half opening 4. The corner mullions 20 are arranged along the extension of the ridge of the corner formed by the outer walls 5 and 6 to the inside of the opening 2.

[0024] By attaching the corner sash 10 to the opening 2 as described above, the first and second sashes 100, 200 form an inside corner indoors and an outside corner outdoors.

[0025] [2. Corner Mullions] Fig. 2 is a cross-sectional view showing the corner mullion 20. Fig. 3 is a cross-sectional view showing the corner mullion 20 in an exploded state. Fig. 4 is a plan view showing the installation state of the lower part of the corner mullion 20. Fig. 5 is a cross-sectional view showing a surface taken along line VV in Fig. 4. Fig. 6 is a cross-sectional view showing a surface taken along line VI-VI in Fig. 4.

[0026] The corner mullion 20 includes plates 31 to 34, mounting edges 37, 38, fireproof materials 51, 52, fireproof insulation material 55, studs 61, 66, lower brackets 70, 80, upper brackets 75, 85, and decorative material 40.

[0027] [2-1. Plate] The first plate 31 is made of an aluminum alloy. The first plate 31 extends vertically along the vertical frame 103 of the first sash 100 and is formed in the shape of a strip. The first plate 31 is integrated with the vertical frame 103. The first plate 31 protrudes indoors in a first projection direction from the indoor-facing surface 103a of the vertical frame 103, and protrudes outdoors in the first projection direction from the outdoor-facing surface 103b of the vertical frame 103. The portion of the first plate 31 protruding indoors from the projection surface 103a of the vertical frame 103 is exposed indoors. The portion of the first plate 31 protruding outdoors from the projection surface 103b of the vertical frame 103 is exposed outdoors. Here, the sighting surface 103a of the vertical frame 103 refers to the indoor surface of the vertical frame 103, and the sighting surface 103b of the vertical frame 103 (part of the window body 110 in this embodiment) refers to the outdoor surface of the vertical frame 103. The sighting surface 103a of the vertical frame 103 is parallel to the first sighting direction and faces indoors. The sighting surface 103b of the vertical frame 103 is parallel to the first sighting direction and faces outdoors.

[0028] The second plate 32 is made of an aluminum alloy. The second plate 32 extends from the exterior edge of the first plate 31 laterally and outwardly of the vertical frame 103 in the first viewing direction. The second plate 32 extends vertically along the vertical frame 103 of the first sash 100 and is formed in the shape of a strip. The second plate 32 is exposed to the outdoors.

[0029] The first and second plates 31, 32 are integrally formed. The plates 31, 32 are arranged at a right angle and form an L-shape in horizontal cross section. The integrated plates 31, 32 form a first half body 35 having the shape of a rectangular tube split vertically. The first half body 35 is provided integrally with the vertical frame 103 of the first sash 100 at the horizontal end of the first sash 100.

[0030] The third plate 33 is made of an aluminum alloy. The third plate 33 extends vertically along the vertical frame 202 of the second sash 200 and is formed in a strip shape. The third plate 33 is integrated with the vertical frame 202. The third plate 33 protrudes indoors from the indoor-facing surface 202a of the vertical frame 202 in a second projection direction, and protrudes outdoors from the outdoor-facing surface 202b of the vertical frame 202 in the second projection direction. The portion of the third plate 33 protruding indoors from the viewing surface 202a of the vertical frame 202 is exposed indoors. The portion of the third plate 33 protruding outdoors from the viewing surface 202b of the vertical frame 202 is exposed outdoors. Here, the viewing surface 202a of the vertical frame 202 is parallel to the second projection direction and faces indoors. A sight surface 202b of the vertical frame 202 (part of the window body 210 in this embodiment) is parallel to the second sight direction and faces outdoors.

[0031] The fourth plate 34 is made of an aluminum alloy. The fourth plate 34 extends from the exterior edge of the third plate 33 laterally and outwardly of the vertical frame 202 in the second viewing direction. The fourth plate 34 extends vertically along the vertical frame 202 of the second sash 200 and is formed in a band shape. The fourth plate 34 is exposed to the outdoors.

[0032] The plates 33 and 34 are integrally formed. The plates 33 and 34 are arranged at a right angle and form an L-shape in horizontal cross section. The integrated plates 33 and 34 form a second half body 36 having the shape of a rectangular tube split vertically. The second half body 36 is provided integrally with the vertical frame 202 at the horizontal end of the second sash 200.

[0033] [2-2. Mounting edge] The mounting edge 37 is made of aluminum alloy. The mounting edge 37 extends from the indoor edge of the first plate 31 laterally and outward from the vertical frame 103 of the first sash 100. The mounting edge 37 is formed integrally with the first plate 31, and a portion of the mounting edge 37 is formed thick. The mounting edge 37 abuts against the third plate 33, particularly against the portion of the plate 33 that extends indoors. The third plate 33 is fastened to the mounting edge 37 with at least one screw 91. This allows the first plate 31 and the third plate 33 to be assembled to each other at a right angle.

[0034] The mounting edge 38 is made of aluminum alloy. The mounting edge 38 extends from the exterior edge of the fourth plate 34 laterally and outwardly of the vertical frame 202 of the second sash 200. The mounting edge 38 is integrally formed with the fourth plate 34, and a portion of the mounting edge 38 is formed thick. The mounting edge 38 abuts against the second plate 32, particularly against a portion of the plate 32 closer to the edge. The second plate 32 is fastened to the mounting edge 38 with at least one screw 92. This allows the second plate 32 and the fourth plate 34 to be assembled to each other at a right angle.

[0035] The first plate 31 and the third plate 33 are assembled together, and the second plate 32 and the fourth plate 34 are assembled together, so that the half bodies 35 and 36 are assembled together to form a rectangular tube. The rectangular tube obtained by integrating the half bodies 35 and 36 together is the main body of the corner mullion 20. Here, the first plate 31 and the fourth plate 34 face each other in the first and second viewing directions, and the second plate 32 and the third plate 33 face each other in the first and second viewing directions.

[0036] The shape of the tube obtained by integrating the half bodies 35, 36 does not have to be a rectangular tube. For example, the portions of the plates 31, 33 that protrude inward from the facing surfaces 103a, 202a of the vertical frames 103, 202 may be curved, and the corners of the tube obtained by integrating the half bodies 35, 36 may be rounded.

[0037] [2-3. Fireproof materials] The fireproof materials 51 and 52 are rectangular pillar-shaped materials made of hardened fiber-reinforced cement reinforced with fibers other than asbestos. For example, the fireproof materials 51 and 52 are made by cutting calcium silicate boards into rectangular pillar shapes.

[0038] The fire-resistant materials 51 and 52 are housed inside a rectangular tube made up of the half bodies 35 and 36 as follows.

[0039] The first fire-resistant material 51 is joined to the first half body 35 at an internal corner of the first half body 35. More specifically, the first fire-resistant material 51 is disposed in the internal corner formed by the first and second plates 31, 32, and is fastened to the second plate 32 by at least one screw 93. The first fire-resistant material 51 extends vertically along the plates 31, 32 at the internal corner formed by the plates 31, 32. The width of the first fire-resistant material 51 in the first prospective direction is smaller than the width of the first plate 31 in the first prospective direction, and the first plate 31 protrudes from the first fire-resistant material 51 toward the interior of the building. The width of the first fire-resistant material 51 in the first prospective direction is smaller than the width of the second plate 32 in the first prospective direction, and the second plate 32 protrudes from the first fire-resistant material 51 laterally and outward.

[0040] The second fire-resistant material 52 is joined to the second half body 36 at an internal corner of the second half body 36. More specifically, the second fire-resistant material 52 is disposed in the internal corner formed by the third and fourth plates 33, 34 and fastened to the fourth plate 34 with at least one screw 94. The second fire-resistant material 52 extends vertically along the plates 33, 34 at the internal corner formed by the plates 33, 34. The width of the second fire-resistant material 52 in the second forward direction is smaller than the width of the third plate 33 in the second forward direction, and the third plate 33 protrudes from the second fire-resistant material 52 toward the interior of the building. The width of the second fire-resistant material 52 in the second forward direction is approximately equal to the width of the fourth plate 34 in the second forward direction, and the second fire-resistant material 52 spans almost the entire width of the fourth plate 34.

[0041] The first fire-resistant material 51 is in surface contact with the second fire-resistant material 52 on the side opposite the fourth plate 34 with respect to the second fire-resistant material 52 and on the side opposite the first plate 31 with respect to the first fire-resistant material 51. The first fire-resistant material 51 and the second fire-resistant material 52 are joined by a fire-resistant adhesive 53. The fire-resistant adhesive 53 is a sodium silicate adhesive such as water glass, and is, for example, an adhesive manufactured by Nippon Insulation Co., Ltd. under the trade name "Bondest."

[0042] The pair of fire-resistant materials 51, 52 bonded with fire-resistant adhesive 53 forms an L-shape in horizontal cross section. The pair of fire-resistant materials 51, 52 is arranged inside the rectangular tube made up of half bodies 35, 36, along the part exposed to the outdoors, i.e., along the second and fourth plates 32, 34.

[0043] [2-4. Fireproof insulation materials] The fireproof insulation material 55 is a cotton-like insulating wool made of fireproof fiber such as AES (alkaline earth silicate). The fireproof insulation material 55 is packed into the space inside the rectangular tube formed by the half bodies 35, 36. More specifically, the fireproof insulation material 55 is packed into the recessed corner formed by the first and third plates 31, 33. The fireproof insulation material 55 covers the inner surface of the first plate 31, a portion of which protrudes indoors from the visible surface 103a of the vertical frame 103. Furthermore, the fireproof insulation material 55 covers the inner surface of the third plate 33, a portion of which protrudes indoors from the visible surface 202a of the vertical frame 202.

[0044] [2-5. Studs] The first stud 61 is made of steel or stainless steel. The first stud 61 extends vertically inside the rectangular tube formed by the half bodies 35 and 36. The first stud 61 has a web 62 and flanges 63 and 64. The web 62 extends vertically and is formed like a strip. The flange 63 is provided perpendicular to the web 62 at the edge of one side of the web 62. The flange 63 extends vertically and is formed like a strip. The flange 64 is provided perpendicular to the web 62 at the edge of the other side of the web 62. The flange 64 extends vertically and is formed like a strip. Because the flanges 63 and 64 extend in opposite directions from the web 62, the first stud 61 has a crank shape in horizontal cross section. This crank shape contributes to the high rigidity of the first stud 61.

[0045] The inside corner formed by the web 62 and flange 63 of the first stud 61 abuts against the outside corner formed by the indoor surface of the first fire-resistant material 51 and the side surface of the first fire-resistant material 51, and the flange 64 of the first stud 61 is provided perpendicular to the indoor surface of the first fire-resistant material 51. The indoor surface of the first fire-resistant material 51 refers to the surface opposite to the surface in surface contact with the second plate 32.

[0046] The first stud 61 is joined to the first half body 35. Specifically, the flange 63 of the first stud 61 is sandwiched between the side surface of the first fire-resistant material 51 and the first plate 31 of the first half body 35, and the flange 63 and the first fire-resistant material 51 are fastened together to the first plate 31 with at least one screw 97.

[0047] The first stud 61 is joined to the first fire-resistant material 51. Specifically, the web 62 of the first stud 61 is in surface contact with the indoor surface of the first fire-resistant material 51 on the side opposite the second plate 32 with respect to the first fire-resistant material 51, the first fire-resistant material 51 is sandwiched between the web 62 and the second plate 32, and the web 62 is fastened to the first fire-resistant material 51 by at least one screw 95. In other words, the first half body 35, the first stud 61, and the first fire-resistant material 51 are integrated.

[0048] The lower end of the first stud 61 protrudes downward from the lower end of the square tube formed by the half bodies 35, 36. The lower end of the first stud 61 is attached via a lower bracket 70 to a structural part (not shown) such as a steel frame provided on the exterior wall 5. The upper end of the first stud 61 protrudes upward from the upper end of the square tube formed by the half bodies 35, 36. The upper end of the first stud 61 is attached via an upper bracket 75 to a structural part (not shown) such as a steel frame provided on the exterior wall 5.

[0049] The shape of the first stud 61 does not have to be crank-shaped. For example, the first stud 61 may have an L-shape in horizontal cross section. In this case, the first stud 61 does not have the flange 64.

[0050] The second stud 66 is made of steel or stainless steel. The second stud 66 extends vertically inside the rectangular tube formed by the half-bodies 35, 36. The second stud 66 has a web 67 and flanges 68, 69. The web 67 extends vertically and is formed like a strip. The flange 68 is provided perpendicular to the web 67 at the edge of one side of the web 67. The flange 68 extends vertically and is formed like a strip. The flange 69 is provided perpendicular to the web 67 at the edge of the other side of the web 67. The flange 69 extends vertically and is formed like a strip. Because the flanges 68 and 69 extend in opposite directions from the web 67, the second stud 66 has a crank shape in horizontal cross section.

[0051] The internal corner formed by the web 67 and flange 68 of the second stud 66 abuts against the external corner formed by the interior surface of the second fire-resistant material 52 and the side surface of the second fire-resistant material 52, and the flange 69 of the second stud 66 is provided perpendicular to the interior surface of the second fire-resistant material 52. The interior surface of the second fire-resistant material 52 refers to the surface opposite to the surface in surface contact with the fourth plate 34.

[0052] The second stud 66 is joined to the second half body 36. Specifically, the flange 68 of the second stud 66 is sandwiched between the side surface of the second fire-resistant material 52 and the third plate 33 of the second half body 36, and the flange 68 and the second fire-resistant material 52 are fastened together to the third plate 33 with at least one screw 98.

[0053] The second stud 66 is joined to the second fire-resistant material 52. Specifically, the web 67 of the second stud 66 is in surface contact with the interior surface of the second fire-resistant material 52 on the side opposite the fourth plate 34 with respect to the second fire-resistant material 52, sandwiching the second fire-resistant material 52 between the web 67 and the fourth plate 34, and the web 67 is fastened to the second fire-resistant material 52 with at least one screw 96. In other words, the second half body 36, the second stud 66, and the second fire-resistant material 52 are integrated.

[0054] The lower end of the second stud 66 protrudes downward from the lower end of the square tube formed by the half bodies 35, 36. The lower end of the second stud 66 is attached via a lower bracket 80 to a structural part (not shown) such as a steel frame provided on the exterior wall 6. The upper end of the second stud 66 protrudes upward from the upper end of the square tube formed by the half bodies 35, 36. The upper end of the second stud 66 is attached via an upper bracket 85 to a structural part (not shown) such as a steel frame provided on the exterior wall 6.

[0055] The shape of the second stud 66 does not have to be crank-shaped. For example, the second stud 66 may have an L-shape in horizontal cross section. In this case, the second stud 66 does not have the flange 69.

[0056] [2-6. Bracket] The first lower bracket 70 is made of steel or stainless steel. As shown in Fig. 5, the first lower bracket 70 has a crank shape when viewed from the side. The first lower bracket 70 has a web 71 and flanges 72 and 73. The web 71 is formed in a plate shape, the flange 72 is provided perpendicular to the web 71 at the outdoor edge of the web 71, and the flange 73 is provided perpendicular to the web 71 at the indoor edge of the web 71, and the flanges 72 and 73 extend in opposite directions from the web 71.

[0057] A flange 72 of the first lower bracket 70 is fastened to the lower end of the web 62 of the first stud 61 with a screw 60a. The web 71 of the first lower bracket 70 extends from the lower end of the flange 72 toward the interior of the building in a first projection direction, and a flange 73 extends downward from the edge of the web 71 on the interior side. The flange 73 is fixed to a structural member (not shown), such as a steel frame, provided on the exterior wall 5 with a bolt 74a.

[0058] The first upper bracket 75, like the first lower bracket 70, is made of steel or stainless steel and has a crank shape when viewed from the side as shown in FIG. A flange 77 of the first upper bracket 75 is fastened to the upper end of the web 62 of the first stud 61 with a screw 60b. A web 76 of the first upper bracket 75 extends from the upper end of the flange 77 toward the interior in a first projection direction, and a flange 78 extends upward from the interior-side edge of the web 76. The flange 78 is fixed to a structural member (not shown), such as a steel frame, attached to the exterior wall 5 with a bolt 74b.

[0059] Like brackets 70 and 75, second lower bracket 80 is made of steel or stainless steel and has a crank shape when viewed from the side as shown in Figure 6. A flange 82 of second lower bracket 80 is fastened to the lower end of web 67 of second stud 66 with screws 65a. A web 81 of second lower bracket 80 extends from the lower end of flange 82 toward the interior in a second projection direction, and a flange 83 extends downward from the edge of web 81 on the interior side. Flange 83 is fixed to a structural member (not shown), such as a steel frame, attached to exterior wall 6 with bolts 84a.

[0060] Like the second lower bracket 80, the second upper bracket 85 is made of steel or stainless steel and has a crank shape when viewed from the side as shown in Figure 6. A flange 88 of the second upper bracket 85 is fastened to the upper end of the web 67 of the second stud 66 with a screw 65b. The web 86 of the second upper bracket 85 extends from the upper end of the flange 87 toward the interior in a second projection direction, and the flange 88 extends upward from the edge of the web 86 on the interior side. The flange 88 is fixed to a structural member (not shown), such as a steel frame, attached to the exterior wall 6 with a bolt 84b.

[0061] [2-7. Decorative materials] The decorative material 40 has an L-shape in horizontal cross section. The decorative material 40 is attached to the plates 32 and 34 and covers the heads of the screws 92, 93, and 94.

[0062] 3. Corner Mullion Manufacturing Method The corner mullions 20 are manufactured by carrying out the following steps [3-1] to [3-8] in order.

[0063] [3-1. Attaching fireproofing materials to studs] The first fire-resistant material 51 is placed along the web 62 and flange 63 of the first stud 61, and the first fire-resistant material 51 is brought into surface contact with the web 62 and flange 63. At this time, the outside corner of the first fire-resistant material 51 is butted against the inside corner formed by the web 62 and flange 63. Next, the web 62 of the first stud 61 is fastened to the first refractory material 51 with at least one screw 95 .

[0064] As described above, by assembling the first fire-resistant material 51 to the first studs 61, the shape of the first fire-resistant material 51 is stabilized. In addition, the first fire-resistant material 51 is easy to carry and handle.

[0065] In the same manner as assembling the first stud 61 to the first fire-resistant material 51, the web 67 of the second stud 66 is fastened to the second fire-resistant material 52 by at least one screw 96.

[0066] [3-2. Attaching fireproofing materials and studs to the half body] The first fire-resistant material 51 is placed in the recessed corner formed by the first and second plates 31, 32. At this time, the first fire-resistant material 51 is placed along the second plate 32 and brought into surface contact with the second plate 32, thereby sandwiching the first fire-resistant material 51 between the second plate 32 and the web 62 of the first stud 61. In addition, the flange 63 of the first stud 61 is placed along the first plate 31 and brought into surface contact with the first plate 31, thereby sandwiching the flange 63 between the first plate 31 and the fire-resistant material 51.

[0067] Next, the second plate 32 is fastened to the first fire-resistant material 51 by at least one screw 93. Furthermore, the first plate 31 is fastened together with the flange 63 and the first fire-resistant material 51 by at least one screw 97.

[0068] In the same manner as assembling the first fire-resistant material 51 and the first stud 61 to the first half body 35, the second fire-resistant material 52 is fastened to the fourth plate 34 by at least one screw 94, and the third plate 33 is fastened together to the flange 68 of the second stud 66 and the second fire-resistant material 52 by at least one screw 98.

[0069] [3-3. Installation of fireproof insulation] The inner surface of the portion of the first plate 31 that projects from the visible surface 103a of the vertical frame 103 toward the interior of the building is covered with a fireproof heat insulating material 55. The inner surface of the portion of the third plate 33 that projects from the visible surface 202 a of the vertical frame 202 toward the interior of the building is covered with a fireproof heat insulating material 55 .

[0070] [3-4. Applying adhesive] An uncured fire-resistant adhesive 53 is applied to the first fire-resistant material 51 or the second fire-resistant material 52 or both.

[0071] [3-5. Assembling the square tube] The vertical frame 103 of the first sash 100 and the vertical frame 202 of the second sash 200 are arranged close to each other, and the first sash 100 and the second sash 200 are arranged at a right angle. In this case, the first plate 31 and the third plate 33 are arranged at a right angle, and the mounting edge 37 is butted against the portion of the third plate 33 that extends indoors. Furthermore, the second plate 32 and the fourth plate 34 are arranged at a right angle, and the mounting edge 38 is butted against the portion of the second plate 32 that is closer to the edge. Furthermore, as shown in Figures 2 and 3, the first fire-resistant material 51 is butted against the second fire-resistant material 52 so that the first and second fire-resistant materials 51 and 52 are combined in an L-shape when viewed from above, and uncured fire-resistant adhesive 53 is sandwiched between these fire-resistant materials 51 and 52. The fire-resistant adhesive 53 hardens over time.

[0072] By combining the first and second plates 31, 32 with the third and fourth plates 33, 34 as described above, the fireproof heat insulating material 55 is packed inside these plates 31 to 34.

[0073] Next, the third plate 33 is fastened to the mounting edge 37 by at least one screw 91, and the second plate 32 is fastened to the mounting edge 38 by at least one screw 92.

[0074] [3-6. Installation of exterior materials] The decorative material 40 is placed at the corner formed by the second and fourth plates 32, 34 and attached to the plates 32, 34. In this way, the heads of the screws 92, 93, 94 are covered by the decorative material 40.

[0075] [3-7. Bracket installation] The flange 72 of the first lower bracket 70 is fastened to the lower end of the web 62 of the first stud 61 with a screw 60a, and the flange 77 of the first upper bracket 75 is fastened to the upper end of the web 62 of the first stud 61 with a screw 60b.

[0076] The flange 82 of the second lower bracket 80 is fastened to the lower end of the web 67 of the second stud 66 with a screw 65a, and the flange 87 of the second upper bracket 85 is fastened to the upper end of the web 67 of the second stud 66 with a screw 65b.

[0077] [3-8. Example of changing the process order] The order of the steps is not limited to the above-mentioned order, and the order of steps [3-1] to [3-7] may be changed. Modification examples (1) to (3) are listed below. At least two of the following modification examples (1) to (3) may be applied in combination.

[0078] (1) After step [3-7], steps [3-1] to [3-6] may be carried out in this order. (2) Step [3-3] may be carried out before either step [3-1] or [3-2]. (3) After the studs 61, 66 are attached to the half bodies 35, 36, respectively, the fire-resistant materials 51, 52 may be attached to the half bodies 35, 36, respectively, and the fire-resistant materials 51, 52 may be fixed to the studs 61, 66.

[0079] 4. Advantageous Technical Effects (1) Since the half bodies 35, 36 are respectively provided at the horizontal ends of the sashes 100, 200, the corner mullion 20 can be easily manufactured by simply assembling the sashes 100, 200 at right angles with the studs 61, 66, the fire-resistant materials 51, 52 and the fire-resistant insulation material 55 assembled.

[0080] (2) The fact that the fire-resistant materials 51, 52 are housed in a square tube made up of half bodies 35, 36 contributes to making the corner mullion 20 more compact and improving its design.

[0081] (3) The set of fire-resistant materials 51, 52 is provided along the part of the rectangular tube consisting of the half bodies 35, 36 that is exposed to the outdoors, that is, along the second and fourth plates 32, 34, inside the rectangular tube, so that flames in the event of an indoor or outdoor fire are unlikely to pass through the corner mullions 20. Therefore, the corner mullions 20 have high flame-blocking performance, and contribute to suppressing the spread of fire.

[0082] (4) The first fire-resistant material 51 abuts against the recessed corner formed by the plates 31 and 32, and the second fire-resistant material 52 abuts against the recessed corner formed by the plates 33 and 34, and these fire-resistant materials 51 and 52 are bonded together, so that flames in the event of an indoor or outdoor fire are unlikely to pass through the corner mullions 20. Therefore, the corner mullions 20 contribute to suppressing the spread of fire.

[0083] (5) The portion of the first plate 31 that protrudes indoors is covered by the fireproof insulation material 55 on the inside of the plates 31 to 34, and the portion of the third plate 33 that protrudes indoors is covered by the fireproof insulation material 55 on the inside of the plates 31 to 34, so heat transfer between indoors and outdoors is blocked. Because the fireproof insulation material 55 is fire-resistant, the fire spread suppression performance of the corner mullions 20 is improved.

[0084] (6) The first stud 61 integrates the first fire-resistant material 51 and the first half body 35 (plates 31, 32). The second stud 66 integrates the second fire-resistant material 52 and the second half body 36 (plates 33, 34). The first stud 61 is fixed to the structural body of the main body 1 with brackets 70, 75, and the second stud 66 is further fixed to the structural body of the main body 1 with brackets 80, 85. This improves the strength and durability of the corner mullions 20 and also suppresses deformation of the corner mullions 20 in the event of a fire.

[0085] (7) Because the studs 61, 66 are made of steel or stainless steel, even if the aluminum alloy plates 31 to 34 are deformed or melted by the heat of a fire, the studs 61, 66 and the fire-resistant materials 51, 52 will not collapse. Therefore, the corner mullions 20 have high fire-spread suppression performance.

[0086] (8) Since the plates 31 to 34 are made of aluminum alloy, the corner mullions 20 are lightweight. [Explanation of symbols]

[0087] 20 Corner Mullion 31 First Plate 32 Second Plate 33 Third Plate 34 Fourth Plate 35 Half Body (First Half Body) 36 Half Body (Second Half Body) 51 First Fireproof Material 52 Secondary fireproof material 53 Fireproof adhesive 55 Fireproof insulation material 61 First Stud 66 Second Stud 100 First Sash 200 Second Sash

Claims

1. a first half body provided at a horizontal end of the first sash and having a shape of a tube split vertically; a second half body provided at a horizontal end of a second sash disposed perpendicular to the first sash, having a shape obtained by splitting the cylinder vertically, and assembled to the first half body to form the cylinder; a first refractory member attached to the first half and extending longitudinally therefrom; a second refractory member attached to the second half, extending longitudinally and joined to the first refractory member; Corner mullions with.

2. The first fire-resistant material and the second fire-resistant material are provided inside the tube along a portion of the tube that is exposed to the outdoors.

2. A corner mullion according to claim 1.

3. The first half body is a first plate extending longitudinally along the horizontal edge of the first sash; a second plate extending from the exterior edge of the first plate laterally and outwardly of the horizontal end of the first sash and integrally formed with the first plate; and The second half body is a third plate extending longitudinally along the horizontal edge of the second sash; a fourth plate extending from the exterior edge of the third plate laterally and outwardly of the horizontal end of the second sash and integrally formed with the third plate; and the first plate and the third plate are assembled to each other at a right angle; the second plate and the fourth plate are assembled to each other at a right angle; The first refractory material and the second refractory material are provided inside the tube along the second plate and the fourth plate.

3. A corner mullion according to claim 2.

4. the first refractory material is arranged to abut against an internal corner formed by the first plate and the second plate; The second refractory material is disposed so as to abut against the recessed corner formed by the third plate and the fourth plate.

4. A corner mullion according to claim 3.

5. The heat insulating member further includes a fire-resistant insulating material filled in the recessed corner formed by the first plate and the third plate. A corner mullion according to claim 3 or 4.

6. the first plate projects indoors from an indoor facing surface of a vertical frame of the first sash, the third plate projects indoors from the indoor facing surface of the vertical frame of the second sash, The fireproof heat insulating material covers the portion of the first plate that protrudes indoors, and also covers the portion of the third plate that protrudes indoors. A corner mullion according to claim 5.

7. a first stud extending longitudinally along the first refractory material inside the tube; The corner mullion of any one of claims 1 to 4, further comprising:

8. a lower bracket and an upper bracket attached to the lower end and upper end of the first stud, respectively; 8. The corner mullion of claim 7, comprising:

9. a second stud extending longitudinally along the second refractory material inside the tube; The corner mullion of claim 7 further comprising:

10. a second lower bracket and a second upper bracket attached to the lower end and the upper end of the second stud, respectively; The corner mullion of claim 9, comprising:

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