window

Abstract

To improve the fire protection performance of an opening of a building.SOLUTION: A window includes a frame member and a sash. The frame member has: upper and lower frame members having width wall parts fixed to upper and lower inner peripheral surfaces of an opening and covering upper and lower sides of the sash from indoor and outdoor sides and guiding the sash; and vertical frame members having width wall parts fixed to a vertical inner peripheral surface of the opening and facing a door end-side vertical side of the sash and formed of a pair of long members. The sash is formed of a fireproof glass plate, and the door end-side vertical side is disposed between the width wall parts of the vertical frame members when closed.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a window disposed in an opening or the like of a building.

Background Art

[0002] Conventionally, windows disposed in openings of buildings are known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventionally, there has been a problem of wanting to improve the fireproof performance of openings in buildings.

[0005] An object of the present invention is to improve the fireproof performance of an opening in a building.

Means for Solving the Problems

[0006] The window of the embodiment includes a frame member and a shoji. The frame member has a finding wall portion fixed to the upper and lower inner peripheral surfaces of the opening and covering the upper and lower sides of the shoji from the indoor and outdoor sides, upper and lower frame members for guiding the shoji, and a vertical frame member fixed to the vertical inner peripheral surface of the opening and having a finding wall portion facing the vertical side on the door tip side of the shoji and consisting of a set of long members. The shoji is formed of a fireproof glass plate, and is a window in which the vertical side on the door tip side is disposed between the finding wall portions of the vertical frame member when closed.

Effects of the Invention

[0007] According to the window of the embodiment, the fireproof performance of an opening in a building can be improved.

Brief Description of the Drawings

[0008] [Figure 1]This is a longitudinal cross-sectional view of the window of the embodiment. [Figure 2] This is a cross-sectional view of the window of the embodiment. [Figure 3] This is an enlarged vertical cross-sectional view of the upper and lower frame portions of the window of the first embodiment. [Figure 4] This is a cross-sectional view of the window of the first embodiment. [Figure 5] This is a perspective view of the window frame material of the first embodiment. [Figure 6] This is a vertical cross-sectional view of the window according to the second embodiment, where (a) is an overall vertical cross-sectional view and (b) is a partially enlarged vertical cross-sectional view of the lower frame portion. [Figure 7] This is a cross-sectional view of the window according to the second embodiment, where (a) is an overall cross-sectional view and (b) and (c) are cross-sectional views of the right vertical frame portion. [Figure 8] This is a vertical cross-sectional view of the window of the third embodiment. [Figure 9] This is a vertical cross-sectional view of a window according to the third embodiment, where (a) is an enlarged vertical cross-sectional view of the upper and lower frame members and the sash, (b) is an enlarged vertical cross-sectional view of a portion of the upper frame, and (c) is an enlarged vertical cross-sectional view of a portion of the lower frame. [Figure 10] This is a cross-sectional view of the window according to the third embodiment, where (a) is an overall cross-sectional view, (b) and (c) are cross-sectional views of the left vertical frame portion, and (d) is an enlarged cross-sectional view of a part of the sash. [Figure 11] This is a vertical cross-sectional view of the window of the fourth embodiment. [Figure 12] This is a cross-sectional view of the window according to the fourth embodiment, where (a) is an overall cross-sectional view and (b) and (c) are cross-sectional views of the vertical frame members. [Figure 13] This is a diagram of the vertical frame material of the window according to the fourth embodiment, where (a) to (d) are views of the lower portion of the member constituting the vertical frame material as seen from the inner circumference. [Figure 14] This is a view of the vertical frame material of the window in the fourth embodiment, seen from the inner side. [Figure 15] This is an exploded perspective view of the vertical frame material of the window in the fourth embodiment, viewed from the inner side. [Figure 16] This is a perspective view of the vertical frame material of the window in the fourth embodiment, seen from the inner side. [Figure 17] It is a view of the vertical frame member of the window in the fourth embodiment during a fire, and is a perspective view of the vertical frame member seen from the inner peripheral side. [Figure 18] It is a view of the vertical frame member of the window in the fourth embodiment during a fire, and is an exploded perspective view of the vertical frame member seen from the inner peripheral side.

Embodiments for Carrying Out the Invention

[0009] As an example of the window in the embodiment, an example of a window installed on the indoor side of a sliding window attached to an opening of a building will be described with reference to the drawings.

[0010] -Overall Configuration- As shown in FIGS. 1 and 2, the window of the embodiment is on the indoor side of the outdoor window A arranged at the opening of the building, and is fixed to the inner peripheral surface of the opening, for example, the inner peripheral surface of a wooden lintel member B. It includes a frame member 1 and inner and outer sliding doors 2, 2 arranged slidably inside the frame member 1.

[0011] -First Embodiment- (Frame Member) The frame member 1 of this embodiment has an upper frame member 11, a lower frame member 12, and left and right vertical frame members 13, 13. The upper frame member 11, the lower frame member 12, and the left and right vertical frame members 13, 13 are each formed by combining a plurality of long members made of a metal material such as stainless steel.

[0012] As shown in FIG. 3, the upper frame member 11 as a whole has a fixing portion 11a fixed to the upper inner peripheral surface of the opening, and guide portions 11b, 11c formed by three finding wall portions 111b, 112b, 114b extending downward from the inner peripheral surface of the fixing portion 11a.

[0013] The upper frame member 11 is composed of two L-shaped long members 111, 112 constituting the indoor side, a flat plate long member 113 and an L-shaped long member 114 constituting the outdoor side.

[0014] The two L-shaped elongated members 111 and 112 that constitute the indoor side of the upper frame member 11 each have a recessed wall portion 111a and 112a, and a visible wall portion 111b and 112b that extends downward from the outdoor end of the recessed wall portion 111a and 112a.

[0015] The recessed wall portion 111a of the L-shaped elongated member 111, which is laminated on the inner circumference side of the two L-shaped elongated members 111 and 112, is formed with a smaller recessed dimension compared to the recessed wall portion 112a of the L-shaped elongated member 112, which is laminated on the outer circumference side. The two L-shaped elongated members 111 and 112 are stacked vertically with their respective inner wall portions 111a and 112a aligned on the interior side, and are positioned along the upper inner surface of the opening (the lower surface of the upper frame member B). The stacked inner wall portions 111a and 112a are fixed to the upper inner surface of the opening by fixing means b1 such as screws.

[0016] Two L-shaped elongated members 111 and 112 fixed to the upper inner surface of the opening have their lower end positions coincided at the visible wall portions 111b and 112b, and both visible wall portions 111b and 112b cover the upper edge of the inner sash 2 from both the inside and outside, forming a guide portion 11b that guides the inner sash 2.

[0017] The flat, elongated member 113 that constitutes the outdoor side of the upper frame member 11 has a recessed wall portion 113a, and the L-shaped elongated member 114 has a recessed wall portion 114a and a visible wall portion 114b that extends downward from the indoor side end of the recessed wall portion 114a.

[0018] The L-shaped elongated member 114 that constitutes the outdoor side of the upper frame member 11 has a recessed wall portion 114a which is positioned on the inner circumference side of the flat elongated member 113 and is formed with a smaller recessed dimension compared to the recessed wall portion 113a. The L-shaped elongated member 114 and the flat elongated member 113 are stacked vertically with their exterior-facing edges aligned, and are positioned along the upper inner surface of the opening (the lower surface of the upper frame member B). The stacked elongated wall portions 114a and 113a are fixed to the upper inner surface of the opening by fixing means b1 such as screws.

[0019] The lower end position of the visible wall portion 114b of the L-shaped elongated member 114 fixed to the upper inner circumferential surface of the opening coincides with the lower end position of the visible wall portion 112b of the other L-shaped elongated member 112 that constitutes the indoor side of the upper frame material 11. Both visible wall portions 114b and 112b cover the upper edge of the outer sash 2 from both the inside and outside, forming a guide portion 11c that guides the outer sash 2.

[0020] As shown in Figure 3, the lower frame member 12 has basically the same configuration as the upper frame member 11, except that its visible dimensions are smaller than those of the upper frame member 11. Overall, it has a fixing portion 12a fixed to the upper inner surface of the opening, and guide portions 12b and 12c formed by three visible wall portions 121b, 122b, and 124b extending upward from the inner surface of the fixing portion 12a.

[0021] The lower frame member 12 consists of two L-shaped elongated members 121 and 122 that constitute the indoor side, and a flat elongated member 123 and an L-shaped elongated member 124 that constitute the outdoor side.

[0022] The two L-shaped elongated members 121 and 122 that constitute the indoor side of the lower frame member 12 each have a recessed wall portion 121a and 122a, and a visible wall portion 121b and 122b that extends upward from the outdoor end of the recessed wall portion 121a and 122a.

[0023] The recessed wall portion 121a of the L-shaped elongated member 121, which is laminated on the inner circumference side of the two L-shaped elongated members 121 and 122, is formed with a smaller recessed dimension compared to the recessed wall portion 122a of the L-shaped elongated member 122, which is laminated on the outer circumference side. The two L-shaped elongated members 121 and 122 are stacked vertically with their respective inner wall portions 121a and 122a aligned on the interior side, and are positioned along the lower inner surface of the opening (the upper surface of the lower frame member B). The stacked inner wall portions 121a and 122a are fixed to the lower inner surface of the opening by fixing means b2 such as screws.

[0024] Two L-shaped elongated members 121 and 122 fixed to the lower inner surface of the opening have their upper end positions coincide with the visible wall portions 121b and 122b, and both visible wall portions 121b and 122b cover the lower edge of the inner sash 2 from both the inside and outside, forming a guide portion 12b that guides the inner sash 2.

[0025] The flat, elongated member 123 that constitutes the outdoor side of the lower frame member 12 has a recessed wall portion 123a, and the L-shaped elongated member 124 has a recessed wall portion 124a and a visible wall portion 124b that extends downward from the indoor side end of the recessed wall portion 124a.

[0026] The L-shaped elongated member 124 that constitutes the outdoor side of the lower frame member 12 has a recessed wall portion 124a which is positioned on the inner circumference side of the flat elongated member 123 and is formed with a smaller recessed dimension compared to the recessed wall portion 123a. The L-shaped elongated member 124 and the flat elongated member 123 are stacked vertically with their respective facing wall portions 124a and 123a aligned on their outdoor sides, and are positioned along the lower inner surface of the opening (the upper surface of the lower frame member B). The stacked facing wall portions 124a and 123a are fixed to the lower inner surface of the opening by fixing means b2 such as screws.

[0027] The upper end position of the visible wall portion 124b of the L-shaped elongated member 124 fixed to the lower inner circumferential surface of the opening coincides with the upper end position of the visible wall portion 122b of the other L-shaped elongated member 122 that constitutes the indoor side of the lower frame material 12. Both visible wall portions 124b and 122b cover the lower edge of the outer sash 2 from both the inside and outside, forming a guide portion 12c that guides the outer sash 2.

[0028] As shown in Figure 4, the vertical frame member 13 is composed of a pair of L-shaped elongated members, consisting of an L-shaped elongated member 131 that constitutes the indoor side and an L-shaped elongated member 132 that constitutes the outdoor side.

[0029] The L-shaped elongated member 131 that constitutes the indoor side of the vertical frame member 13 has a recessed wall portion 131a and a visible wall portion 131b that extends in the circumferential direction from the outdoor end of the recessed wall portion 131a, and the L-shaped elongated member 132 that constitutes the outdoor side has a recessed wall portion 132a and a visible wall portion 132b that extends in the circumferential direction from the indoor end of the recessed wall portion 132a.

[0030] The two L-shaped elongated members 131 and 132 are positioned with their visible wall portions 131b and 132b facing each other, and their internal wall portions 131a and 132a are placed on the vertical inner surface of the opening (the inner surface of the left and right frame members B), and are fixed to the vertical inner surface of the opening by fixing means b3 such as screws.

[0031] Two L-shaped elongated members 131 and 132 fixed to the vertical inner surface of the opening have their inner end positions of visible wall portions 131b and 132b coincide, and the two visible wall portions 131b and 132b form a fitting portion 13a on the vertical inner surface of the opening into which the leading edge vertical sides of the inner and outer sliding doors 2, 2 fit. When the inner and outer sliding doors 2,2 are closed, the leading edge vertical sides of the inner and outer sliding doors 2,2 directly abut against the vertical inner surface of the opening and are fitted into the fitting section 13a, while the two visible wall sections 131b and 132b cover the leading edge vertical sides of the inner and outer sliding doors 2,2 from both the inside and outside.

[0032] The upper frame member 11, the lower frame member 12, and the left and right vertical frame members 13, 13 are not assembled around the perimeter with fasteners such as screws, but as shown in Figure 5, they are fixed to the inner surface of the opening, thereby forming a frame as a whole.

[0033] Specifically, the left vertical frame member 13 of the frame is positioned so that its fitting portion 13a is continuous with the outdoor-side guide portion 11c of the upper frame member 11 and the outdoor-side guide portion 12c of the lower frame member 12, and the right vertical frame member 13 of the frame is positioned so that its fitting portion 13a is continuous with the indoor-side guide portion 11b of the upper frame member 11 and the indoor-side guide portion 12b of the lower frame member 12, and each is fixed to the inner circumferential surface of the opening.

[0034] Furthermore, the upper end portions of the visible wall sections 131b and 132b of the left vertical frame member 13 are removed from the exterior side of the upper frame member 11 to accommodate the two visible wall sections 112b and 114b, and the lower end portions of the visible wall sections 131b and 132b are removed from the exterior side of the lower frame member 12 to accommodate the two visible wall sections 122b and 124b. Similarly, the right vertical frame member 13 has its upper ends of the visible wall sections 131b and 132b removed from the interior side of the upper frame member 11 by the amount that accommodates the two visible wall sections 111b and 112b, and its lower ends of the visible wall sections 131b and 132b removed from the interior side of the lower frame member 12 by the amount that accommodates the two visible wall sections 121b and 122b, thereby preventing interference between the visible wall sections and enabling a smooth fit of the upper and lower frame members and the left and right vertical frame members.

[0035] (Shoji screen) In this embodiment, the outer shoji screen 2, as shown in Figures 3 and 4, consists only of fire-resistant glass panels, such as heat-resistant crystallized glass, and does not have a frame material such as aluminum. The inner and outer sliding doors 2,2 are attached to guide portions 11b, 11c, 12b, and 12c formed on the upper frame material 11 and the lower frame material 12 by sliding mechanisms, and are arranged to be slidable.

[0036] In the closed state, the inner and outer sliding doors 2,2 have their leading edges abutting the vertical inner surface of the opening, their upper and lower edges are covered from both inside and outside by the visible wall portions of the upper frame material 11 and the lower frame material 12, and their leading edge side vertical edges are covered by the visible wall portions 131b and 132b of the vertical frame material 13.

[0037] (Effects of the window in this embodiment) As described above, the window of this embodiment can be equipped with fire protection equipment in a simple configuration by fixing a long frame material to the inner circumference of the opening to form a frame and forming a sash with a fire-resistant glass plate.

[0038] Furthermore, in this embodiment, since the interior and exterior surfaces of the outer perimeter of the sash, which is made of fire-resistant glass, are covered with a frame material, it is difficult for flames to form a path inside and outside the window, and fire-resistant performance can be maintained. Furthermore, the vertical frame material does not have a part that the edge of the shoji screen abuts against, and the shoji screen abuts directly against the inner surface of the opening. Therefore, the risk of the shoji screen moving due to deformation of the vertical frame material caused by heat during a fire, thereby creating a gap between the shoji screen and the frame material, is reduced, and fire resistance can be maintained. Furthermore, since the left vertical frame member 13 only has a fitting portion 13a that accommodates the leading edge of the outer sash 2, and the right vertical frame member 13 only has a fitting portion 13a that accommodates the leading edge of the inner sash 2, the ease of installation can be improved with a simple configuration while maintaining fire resistance. Furthermore, since the upper frame member 11, the lower frame member 12, and the left and right vertical frame members 13 are formed from L-shaped members, manufacturing is easy. Also, since the left vertical frame member 13 is made of an L-shaped member and only forms a fitting portion 13a that accommodates the leading edge of the outer sash 2, and the right vertical frame member 13 is made of an L-shaped member and only forms a fitting portion 13a that accommodates the inner sash 2, material costs can be reduced.

[0039] -Second Embodiment- (Frame material) The frame material 1 of this embodiment has an upper frame material 51, a lower frame material 52, and left and right vertical frame materials 53, 53, each made of a metal material such as stainless steel or aluminum alloy. Regarding the window in this embodiment, the same configuration as the window in the first embodiment will not be described.

[0040] As shown in Figure 6(a), the upper frame member 51 has a recessed wall portion 51a fixed to the upper inner circumferential surface B1 of the opening, an indoor wall portion 51b and an outdoor wall portion 51c extending downward from the indoor and outdoor ends of the recessed wall portion 51a, and three visible wall portions 51d, 51e, and 51f extending downward from the inner circumferential surface of the recessed wall portion 51a. The three visible wall portions 51d, 51e, and 51f form upper guide portions 51g, 51g that guide the upper edges of the inner and outer sashes 2, 2.

[0041] The upper frame material 51 has its recessed wall portion 51a positioned on the upper inner surface B1 of the opening with a resin spacer 512 in between, and is fixed at the bottom of the upper guide portions 51g, 51g by fixing means b1 such as screws.

[0042] The upper frame material 51 has a plurality of longitudinally extending ribs 51i on the outer circumferential surface of the recessed wall portion 51a, and heat-expanding foaming materials f,f that expand due to heat during a fire are placed at appropriate positions between the outer circumferential surface of the recessed wall portion 51a and the resin spacer 512.

[0043] As shown in Figure 6(a), the lower frame member 52 has a recessed wall portion 52a fixed to the lower inner circumferential surface B2 of the opening, and inner and outer lower rails 52b, 52b extending upward from the inner circumferential surface of the recessed wall portion 52a. The inner and outer lower rails 52b, 52b have their upper ends bent horizontally to form wide door roller mounting sections 52c, 52c in the depth direction.

[0044] The lower frame member 52 has its recessed wall portion 52a positioned on the lower inner surface B2 of the opening with a resin spacer 522 in between, and is fixed between the inner and outer lower rails 52b, 52b by fixing means b2 such as screws.

[0045] The outer circumferential surface of the recessed wall portion 52a of the lower frame material 52 is provided with a plurality of longitudinally extending ribs 52i, and heat-expanding foaming materials f,f that expand due to the heat of a fire are placed at appropriate positions between the outer circumferential surface of the recessed wall portion 52a and the resin spacer 522. Furthermore, as shown in Figure 6(b), the lower frame material 52 may be provided with a cover member 52d on the upper surface of the recessed wall portion 52a between the inner and outer lower rails 52b, 52b, so as to cover the head of the fixing means b2.

[0046] As shown in Figures 7(a) and 7(b), the vertical frame member 53 has an outer peripheral member 531 made of a metal material such as an aluminum alloy and fixed to the vertical inner circumferential surface B3 of the opening, and an inner peripheral member 532 made of a metal material such as stainless steel or an aluminum alloy and attached to the inner circumference of the outer peripheral member 531. The vertical frame member 53 can be rotated 180 degrees around its vertical axis, allowing it to be used for both the left and right vertical frames.

[0047] The outer peripheral member 531 of the vertical frame member 53 has a recessed wall portion 531a fixed to the vertical inner circumferential surface B3 of the opening, and visible wall portions 531b, 531b extending in the circumferential direction from the indoor end and outdoor end of the recessed wall portion 531a.

[0048] The inner perimeter member 532 of the vertical frame member 53 has an indoor facing wall 532a, an outdoor facing wall 532b, an indoor recessed wall 532c extending outward from the inner perimeter end of the indoor facing wall 532a, an outdoor recessed wall 532d extending inward from the inner perimeter end of the outdoor facing wall 532b, an indoor sliding door support wall 532e extending outward from the outdoor side of the indoor recessed wall 532c, an outdoor sliding door support wall 532f extending outward from the indoor side of the outdoor recessed wall 532d, and a bottom wall 532g connecting the indoor sliding door support wall 532e and the outdoor sliding door support wall 532f.

[0049] The vertical frame member 53 is formed by inserting the inner circumferential member 532 between the inner and outer visible wall portions 531b of the outer circumferential member 531, bringing the bottom wall 532g of the inner circumferential member 532 into contact with the visible wall portion 531a of the outer circumferential member 531, and connecting them with fixing means b32 such as screws.

[0050] The vertical frame member 53 has a fitting section 53a formed by the inner wall 532e of the inner perimeter member 532, the outer wall 532f of the inner perimeter member 532, and the bottom wall 532g, which receive the leading edge of the sliding door 2 when closed, and hollow sections 53b are formed on both sides of the fitting section 53a in the depth direction.

[0051] The fitting portion 53a formed on the vertical frame member 53 is formed by making the depth width dimensions of the indoor-side depth wall 532c and the outdoor-side depth wall 532d of the inner circumferential member 532 different, thereby offsetting it to one side in the depth direction. The vertical frame member 53 is arranged so that the positions of the fitting portions 53a of the left and right vertical frame members 53 are different in the depth direction by inverting the vertical frame member 53 around the vertical axis.

[0052] Specifically, the left vertical frame member 53 is formed only with a fitting portion 53a that accommodates the leading edge of the outer sash 2 that abuts against the vertical frame member 53 when closed, and the right vertical frame member 53 is positioned so that it also forms only with a fitting portion 53a that accommodates the leading edge of the inner sash 2 that abuts against the right vertical frame member 53 when closed.

[0053] The vertical frame member 53 is positioned with the recessed wall portion 531a of the outer peripheral member 531 on the vertical inner surface B3 of the opening, with a resin spacer 535 in between, and is fixed by fixing means b3 such as screws. The outer surface of the recessed wall portion 531a of the outer peripheral member 531 of the vertical frame member 53 is provided with a plurality of longitudinally extending ribs 531i, and heat-expanding foaming materials f,f that expand due to heat during a fire are placed at appropriate positions between the outer peripheral surface of the recessed wall portion 531a and the resin spacer 535.

[0054] The vertical frame member 53 may be formed by an outer peripheral member 531 made of a metal material such as an aluminum alloy, and two inner peripheral members 533 and 534 made of a metal material such as an aluminum alloy.

[0055] For example, as shown in Figure 7(c), the vertical frame member 53 comprises an outer peripheral member 531, a recessed wall portion 531a fixed to the vertical inner surface of the opening B, an indoor inner wall portion (visible wall portion) 531b extending in the circumferential direction from the indoor end of the recessed wall portion 531a, an outdoor outer wall portion (visible wall portion) 531c extending in the circumferential direction from the outdoor end of the recessed wall portion 531a, and a barrier extending in the circumferential direction from the inner surface of the recessed wall portion 531a. The outer perimeter member 531 may be formed from an inner wall portion 531d of the outer perimeter member 531 and an outer wall portion 531e of the outer perimeter member 531, with the inner perimeter members 533 and 534 each formed from flat plate-shaped members, and the inner perimeter members 533 and 534 may be attached between the inner wall portion 531b of the outer perimeter member 531 and the inner wall portion 531d of the outer perimeter member 531, and between the outer wall portion 531c of the outer perimeter member 531 and the outer wall portion 531e of the outer perimeter member 531, respectively.

[0056] In this case, locking portions 531f may be formed on the inner circumferential ends of the indoor wall portion 531b of the outer peripheral member 531, the indoor wall portion 531d of the shoji screen support, the outdoor wall portion 531c, and the indoor wall portion 531e of the shoji screen support, respectively, and the locking portions 533a and 534a formed at both ends of the inner peripheral members 533 and 534 may be locked together to form the two together.

[0057] (Shoji screen) As shown in Figures 6 and 7, the inner and outer sliding doors 2,2 are formed by attaching roller mounting members 22 to the lower edge of a fire-resistant glass plate 20, such as heat-resistant crystallized glass. The inner and outer sliding doors 2,2 are guided by an upper guide portion 51g formed on the upper frame material 51, and the rollers 22a of the roller mounting material 22 are placed on the roller mounting portions 52c, 52c of the inner and outer lower rails 52b, 52b of the lower frame material 52, and are arranged to slide freely.

[0058] Furthermore, the inner and outer sliding doors 2,2 may be fitted with an upper edge member 21 made of resin material or the like on their upper edges so that they are guided by the upper guide portion 51g of the upper frame material 51. This stabilizes the sliding motion of the sliding doors 2 and suppresses noises caused by contact between the glass plate and the metal frame material. Alternatively, the inner sliding door 2 may have a handle portion 2a attached to the indoor side of the fire-resistant glass plate 20 by means of adhesive or other fixing means.

[0059] In the closed state, the outer sliding doors 2,2 have their upper edges covered from both inside and outside by the visible wall portions 51d, 51e, and 51f of the upper frame material 51, and their left and right door-side vertical edges are fitted into the fitting portions 53a of the vertical frame materials 13, 13, respectively.

[0060] (Effects of the window in this embodiment) In this embodiment, the window is constructed by fixing a long frame material to the inner circumference of the opening to form a frame, and then forming a sash with fire-resistant glass plates, thus enabling the installation of fire protection equipment with a simple configuration.

[0061] Furthermore, in this embodiment, since the interior and exterior surfaces of the outer perimeter of the sash, which is made of fire-resistant glass, are covered with a frame material, it is difficult for flames to form a path inside and outside the window, and fire-resistant performance can be maintained.

[0062] Furthermore, the left vertical frame member 53 has only a fitting portion 53a that accommodates the leading edge of the outer sash 2, and the right vertical frame member 53 has only a fitting portion 53a that accommodates the leading edge of the inner sash 2. The gap between the vertical frame member 53 and the inner and outer sashes 2 is covered by the inner peripheral member, and hollow portions 53b, 53b are formed on both sides in the depth direction of the fitting portions 53a of the left and right vertical frame members 53. In the event of a fire, flames are less likely to pass through, protecting the fitting portions 53a that accommodate the leading edges of the inner and outer sashes 2, 2, thereby improving fire resistance.

[0063] Furthermore, the inner and outer lower rails 52b, 52b that guide the inner and outer sliding doors 2, 2 have wide portions (door roller mounting portions 52c, 52c) that are formed to be wider in the depth direction, and since these wide portions support the door rollers 22a, 22a inside the lower part of the door roller mounting material 22 of the inner and outer sliding doors 2, 2, it is possible to suppress the inner and outer sliding doors 2, 2 from shifting in the depth direction and creating a gap at the meeting point, and to keep the gap between the inner and outer lower rails 52b, 52b and the door roller mounting material 22 small, thereby improving fire resistance.

[0064] -Third Embodiment- The window of this embodiment comprises a frame material 1 arranged on the inner circumferential surface of the opening B, and a plurality of sashes 2 (three in this example) that are guided by the frame material 1 and arranged to slide freely in the left-right direction. The frame material 1 includes an upper frame material 71, a lower frame material 72, and left and right vertical frame materials 73, 73, each made of a metal material such as an aluminum alloy. Regarding the window in this embodiment, we will omit further explanation of its configuration, as it is similar to that of the windows in the first and second embodiments.

[0065] As shown in Figure 8, the upper frame material 71 has a plurality of upper frame members 711 that are arranged on the upper inner circumferential surface B1 of the opening. As shown in Figures 9(a) and 9(b), the upper frame member 711 is a long member with a substantially L-shaped cross-section, having a recessed wall 711a fixed to the upper inner circumferential surface B1 of the opening, and a visible wall 711b extending in the inner circumferential direction (downward) from one end of the recessed wall 711a in the indoor-outdoor direction.

[0066] The upper frame member 711 has multiple elongated holes 711c formed in the recessed wall 711a and is fixed to the upper inner surface B1 of the opening by fixing means b1 such as screws. The upper frame material 71 is formed by arranging multiple upper frame members 711 adjacent to each other in the depth direction, thereby creating an upper guide portion 71a that guides the shoji screen 2 between the visible walls 711b of adjacent upper frame members 711.

[0067] As shown in Figures 8 and 9(a), the lower frame member 72 has a core member 722 made of aluminum alloy, wood, resin, or the like, and two rail-shaped members 721 made of metal material such as aluminum alloy that are attached to the left and right sides of the core member 722. Overall, a plurality of lower rail sections 721d are provided on the upper surface of the lower frame body, which has a roughly rectangular cross-section.

[0068] As shown in Figure 9(c), the rail profile 721 of the lower frame material 72 has a recessed wall 721a along the upper surface of the core material 722, a visible wall 721b along the indoor or outdoor side of the core material 722, a bottom wall 721c extending from the lower end of the visible wall 721b along the lower surface of the core material 722, and a plurality of lower rail sections 721d, 721d extending upward from the upper surface of the recessed wall 721a, with screw holes 721e formed between the two lower rail sections 721d, 721d of the recessed wall 721a. The lower rail section 721d of the rail profile 721 has a door roller mounting section 721f formed at its upper end, which is wider in the depth direction.

[0069] The lower frame member 72 is formed by inserting the left and right sides of the core member 722 between the front wall 721a and the bottom wall 721c of the rail profile 721, and is placed on the lower inner surface B2 of the opening, and is fixed between the two lower rail portions 721d, 721d of the front wall 721a by fixing means b2 such as screws.

[0070] Furthermore, gypsum boards C, etc., may be arranged on the indoor and outdoor sides of the lower frame material 72 fixed to the opening B such that the upper surface of the roller mounting portion 721f of the lower rail portion 721d and the upper end surface of the gypsum board C are flush. By making the upper end of the roller mounting portion 721f of the lower rail portion 721d of the lower frame material 72 flush with the upper surface of the gypsum board C, it is possible to improve the aesthetic appearance and achieve other effects.

[0071] As shown in Figures 8 and 10(a), the vertical frame member 73 has a main vertical frame member 731 made of a metal material such as an aluminum alloy and a secondary vertical frame member 732 made of a metal material such as an aluminum alloy, and the two members are connected so as to be adjustable in length.

[0072] As shown in Figure 10(b), the main vertical frame member 731 is a long member with a roughly U-shaped cross-section, having a recessed wall 731a and visible wall portions 731b, 731b extending in the circumferential direction from the indoor and outdoor ends of the recessed wall 731a.

[0073] The main vertical frame member 731 has its upper end in contact with or close to the upper inner surface B1 of the opening, and the recessed wall 731a is positioned along the vertical inner surface B3 of the opening, with the recessed wall 731a being fixed to the vertical inner surface B3 of the opening by fixing means b3 such as screws.

[0074] As shown in Figures 10(b) and 10(c), the secondary vertical frame member 732 is a member with a roughly U-shaped cross-section, having a recessed wall 732a and visible wall portions 732b, 732b extending in the circumferential direction from the indoor and outdoor ends of the recessed wall 732a.

[0075] The secondary vertical frame member 732 is positioned so that its lower end abuts against or is close to the lower inner surface B2 of the opening (or a gypsum board or the like placed on the lower inner surface B2), and the recessed wall 732a is positioned along the vertical inner surface B3 of the opening. The recessed wall 732a and the vertical inner surface B3 of the opening are fixed together by adhesive or the like with a resin spacer 734 sandwiched between them.

[0076] The vertical frame members 73 positioned in the opening overlap the lower portion of the main vertical frame member 731 and the upper portion of the secondary vertical frame member 732, and in the overlapping portion, the indoor walls of both members and the outdoor walls of both members are connected by fixing means b4 such as screws.

[0077] The visible wall portion 731b of the main vertical frame member 731 and the visible wall portion 732b of the secondary vertical frame member 732 have screw holes for connecting the two members. However, the screw holes in the visible wall portion 731b of the main vertical frame member 731 or the visible wall portion 732b of the secondary vertical frame member 732 are formed as elongated holes. This allows the two members to shift at the connection point between the main vertical frame member 731 and the secondary vertical frame member 732, thereby absorbing thermal expansion when the vertical frame member 73 undergoes thermal expansion.

[0078] In addition, gypsum board C or the like may be placed on the indoor and outdoor sides of the vertical frame material 73 fixed to the opening B.

[0079] (Shoji screen) As shown in Figures 8 to 10, the multiple sliding doors 2 of this embodiment are formed by attaching a roller mounting material 22 to the lower edge of a fire-resistant glass plate 20, such as heat-resistant crystallized glass. The sliding door 2 is slidably positioned so that its upper edge is guided by an upper guide portion 71a formed on the upper frame material 71, and the roller 22a of the roller mounting material 22 is guided by the lower rail portion 721d of the lower frame material 72. Furthermore, the shoji screen 2 may have an upper edge member 21 made of resin material or the like attached to its upper edge so that it is guided by the upper guide portion 71a of the upper frame member 71.

[0080] Of the multiple shoji screens 2, the shoji screens 2 positioned at the left and right ends may have handles 2a attached, and by providing handles 2a, the shoji screens 2 can be opened and closed by holding the handles 2a.

[0081] Furthermore, the shoji screens 2 may be provided with engaging parts 2b for interlocking adjacent shoji screens 2. For example, as shown in Figure 10(d), the shoji screen 2 may have an engaging portion 2b provided by attaching a flat block-shaped member made of resin material to the lower part of the left and right ends of the surface facing the adjacent shoji screen 2 using fixing means b such as screws. Multiple shoji screens 2 can be linked together by moving the shoji screens 2 at the left and right ends from side to side, causing the engaging parts 2b, 2b of adjacent shoji screens 2, 2 to engage with each other.

[0082] In the closed state, the upper edges of the multiple sliding doors 2 are covered from both the inside and outside by the visible wall 711b of the upper frame member 711 that constitutes the upper frame material 71, and the leading edge vertical edges of the sliding doors 2 positioned at the left and right ends are in contact with or close to the inner circumferential surface of the vertical frame material 73, and are positioned between the visible wall portions 731b on the interior and exterior sides of the main vertical frame material 731 of the vertical frame material 73, and are covered from both the inside and outside.

[0083] (Effects of the window in this embodiment) In this embodiment, the window is constructed by fixing a long frame material to the inner circumference of the opening to form a frame, and then forming a sash with fire-resistant glass plates, thus enabling the installation of fire protection equipment with a simple configuration.

[0084] Furthermore, in this embodiment, since the interior and exterior surfaces of the outer perimeter of the sash, which is made of fire-resistant glass, are covered with a frame material, it is difficult for flames to form a path inside and outside the window, and fire-resistant performance can be maintained.

[0085] Furthermore, the lower rail section 721d that guides the sliding door 2 has a wide section (door roller mounting section 721f) that is wide in the depth direction, and since the door roller 22a is mounted in the lower interior of the door roller mounting material 22 of the sliding door 2 in this wide section, it is possible to suppress the sliding door 2 from shifting in the depth direction and creating a gap at the meeting stile, and the gap between the lower rail section 721d and the door roller mounting material 22 can be kept small, thereby improving fire resistance. Furthermore, since the upper frame member 71 is formed from multiple L-shaped members, and the lower frame member 72 is formed by fixing rail-shaped members 721 of the same shape to a core material, the members can be shared, thereby reducing member costs.

[0086] -Fourth Embodiment- The window of this embodiment comprises a frame material 1 arranged on the inner circumferential surface of the opening B, and a plurality of sashes 2 (three in this example) that are guided by the frame material 1 and arranged to slide freely in the left-right direction. The frame material 1 includes an upper frame material 91, a lower frame material 92, and left and right vertical frame materials 93, 93, each made of a metal material such as an aluminum alloy. Regarding the window in this embodiment, the same configuration as the windows in the first to third embodiments will not be described.

[0087] The upper frame material 91 is made of a metal material such as an aluminum alloy, and as shown in Figure 11, it has a recessed wall portion 91a fixed to the upper inner circumferential surface B1 of the opening, and four visible wall portions 91b, 91c, 91d, and 91e extending downward from the inner circumferential surface of the recessed wall portion 91a, and three upper guide portions 91f, 91g, and 91h are formed between the four visible wall portions 91b, 91c, 91d, and 91e to guide the upper edges of the sliding doors 2,2.

[0088] The upper frame member 91 is positioned so that the recessed wall portion 91a follows the upper inner surface B1 of the opening, and is fixed by fastening means b1, b1 such as screws at the upper guide portions 91f, 91h on the indoor and outdoor sides.

[0089] The lower frame material 92 is made of a metal material such as an aluminum alloy, and as shown in Figure 11, it has a recessed wall portion 92a fixed to the lower inner circumferential surface B2 of the opening, and an inner rail portion 92b, a middle rail portion 92c, and an outer rail portion 92d extending upward from the inner circumferential surface of the recessed wall portion 92a. The inner rail section 92b, middle rail section 92c, and outer rail section 92d of the lower frame material 92 have a door roller mounting section formed at the top, which is wide in the depth direction.

[0090] The lower frame member 92 is positioned so that the recessed wall portion 92a follows the lower inner circumferential surface B2 of the opening, and is fixed between the inner rail portion 92b and the middle rail portion 92c, and between the middle rail portion 92c and the outer rail portion 92d by fixing means b2, b2 such as screws.

[0091] The upper frame member 91 and the lower frame member 92 are provided with a plurality of longitudinally extending ribs on the outer circumferential surfaces of the recessed wall portions 91a and 92a, and are arranged with a gap between them and the upper inner circumferential surface B1 or the lower inner circumferential surface B2. A heat-expanding material that expands due to heat during a fire may be placed at appropriate positions between the outer circumferential surfaces of the recessed wall portions 91a and 92a and the upper inner circumferential surface B1 or the lower inner circumferential surface B2, if necessary.

[0092] The vertical frame members 93 have the same configuration on both the left and right sides, and include a main vertical frame member (main frame member) 931 arranged along the longitudinal direction on the vertical inner circumferential surface B3 of the opening, a secondary vertical frame member (secondary frame member) 932 connected to the lower end of the main vertical frame member 931 so as to be movable in the longitudinal direction, and an inner circumferential member (cover member) 933 that engages with the inner circumference of the main vertical frame member 931. The vertical frame members 93 can be rotated 180 degrees around the vertical axis, allowing the left and right vertical frames to be used interchangeably. They are fixed to the vertical inner surface B3 of the opening with their top and bottom ends in contact with or close to the upper inner surface B1 and lower inner surface B2 of the opening.

[0093] As shown in Figures 12(a)(b)(c), 13(a), 14, and 15(a), the main vertical frame member 931 has a recessed wall portion 931a and visible wall portions 931b, 931b that extend inward in the circumferential direction from the indoor and outdoor ends of the recessed wall portion 931a.

[0094] The main vertical frame member 931 is made of a metal material such as an aluminum alloy and consists of a long main body portion 931A having a length dimension h931 that is shorter than the height dimension H of the opening B, and a resin cover portion 931B that is continuously provided at the longitudinal end of the main body portion 931A, which in this embodiment is the lower end, and the overall length dimension h93 is about the same as the height dimension H of the opening B.

[0095] When the vertical frame members 93 are fixed to the opening, the main vertical frame member 931 is positioned such that the upper end of the main body portion 931A abuts against or is close to the upper inner surface B1, and the lower end of the covering portion 931B abuts against or is close to the lower inner surface B2, so that the recessed wall portion 931a follows the vertical inner surface B3 of the opening, and is fixed by fixing means b3 such as screws.

[0096] The covering portion 931B of the main vertical frame member 931 may have a recessed wall portion and an exposed wall portion both inside and outside, similar to the main body portion 931A, but it is sufficient that it has dimensions and a shape that covers the secondary vertical frame member 932 when viewed from the inside.

[0097] Furthermore, the means for providing the covering portion 931B continuously to the lower end of the main body portion 931A of the main vertical frame member 931 are not limited. For example, an insertion portion may be provided in the upper part of the covering portion 931B so as to follow the inner circumferential surface of the lower end of the main body portion 931A, and the insertion portion may be attached to the inside of the main body portion 931A by adhesive or the like.

[0098] The main body portion 931A of the main vertical frame member 931 is provided with an engaging piece 931c that extends inward from the inner circumferential surface of the recessed wall portion 931a and then bends to one side, and an engaging piece 931d that protrudes from the inner surface of the visible wall portion 931b on one side. The engaging pieces 931c and 931d form an engaged portion into which the inner circumferential member (cover material) 933 is engaged.

[0099] The engaging pieces 931c and 931d of the main body portion 931A of the main vertical frame member 931 are notched in the lower region, preventing interference between the engaging pieces 931c and 931d and the sub-vertical frame member 932 when the sub-vertical frame member 932 is connected to the lower inner circumference of the main vertical frame member 931.

[0100] The main vertical frame member 931 has an elongated hole 931e formed in the visible wall portion 931b that faces outwards when placed in the opening B of the building. The elongated holes 931e provided in the main vertical frame member 931 may be provided in the visible wall portion 931b on the interior side, or they may be provided in both visible wall portions 931b.

[0101] The secondary vertical frame member 932 is made of a metal material such as an aluminum alloy and, as shown in Figures 12(c), 13(b), 14, and 15(a), is positioned inside the main vertical frame member 931 and has a recessed wall portion 932a that runs along the recessed wall portion 931a of the main vertical frame member 931, and recessed wall portions 932b, 932b that extend inward from the indoor and outdoor ends of the recessed wall portion 932a and run along the visible wall portions 931b, 931b of the main vertical frame member 931.

[0102] The secondary vertical frame member 932 has screw holes 932e formed in the visible wall portion 932b that faces outwards when placed in the opening B of the building. As can be seen in Figures 13(c) and 14, it is positioned inside the main vertical frame member 931, and the elongated hole 931e formed in the visible wall portion 931b on the outward side of the main vertical frame member 931 and the screw holes 932e formed in the visible wall portion 932b on the outward side of the secondary vertical frame member 932 are fixed and connected by fastening means b93 such as screws.

[0103] The position of the fixing means b93 in the elongated hole 931e of the main vertical frame member 931 is adjusted and fixed at a position where the length dimension of the vertical member formed by the main vertical frame member 931 and the sub-vertical frame member 932 is the same as the height dimension H of the opening B, and the lower end of the sub-vertical frame member 932 is in contact with or close to the lower inner surface B2 when the vertical frame member 13 is fixed to the opening.

[0104] It is preferable that the lower end position of the secondary vertical frame member 932 and the lower end position of the covering portion 931B of the main vertical frame member 931 are the same. However, depending on design errors or height dimension H errors of the opening B, the lower end of the secondary vertical frame member 932 may be connected so as to protrude from the lower end of the covering portion 931B.

[0105] Furthermore, the secondary vertical frame member 932 only needs to be attached to the main vertical frame member 931 so as to be movable in the longitudinal direction, in order to absorb the thermal expansion of the main vertical frame member 931 in the event of a fire, and the part to which the secondary vertical frame member 932 is attached is not limited to the lower end of the main vertical frame member 931. Furthermore, the end portion of the main vertical frame member 931 to which the secondary vertical frame member 932 is attached is not limited to the end face portion of the main vertical frame member 931, but may also be an area near the end portion.

[0106] As shown in Figures 12(a)(b), 14, and 15(b), the inner circumferential member (cover material) 933 has a recessed wall portion 933a, visible wall portions 933b, 933b extending outward from the indoor and outdoor ends of the recessed wall portion 933a, and engaging claws 933c, 933c provided at the outer circumferential ends of the visible wall portions 933b, 933b.

[0107] The inner circumferential member 933 is made of a metal material such as an aluminum alloy and has a main body portion 933A having a length dimension h933 smaller than the length dimension h93 of the main vertical frame member 931, and resin end members (cap members) 933B fitted to the upper and lower ends of the main body portion 933A.

[0108] The end members 933B fitted into the upper and lower ends of the main body 933A protrude by the difference between the dimension h933 of the main body 933A and the dimension h93 of the main vertical frame member 931, and as a whole have a length dimension that is approximately the same as the length dimension h13 of the vertical frame member 13.

[0109] The resin end member 933B of the inner circumferential member 933 may be provided at both the upper and lower ends of the main body portion 933A, or it may be provided at only one of the upper and lower ends.

[0110] The dimension by which the resin end member 933B protrudes from the end of the main body 933A refers to the sum of the protrusion amounts of the upper and lower end members 933B fitted into the upper and lower ends of the main body 933A, and if it is provided on either the upper or lower end, it refers to the protrusion amount of the end member 933B provided on that one end.

[0111] Furthermore, the overall dimensions of the inner circumferential member (cover member) 933, including the end member 933B, are preferably about the same length as the main vertical frame member 931 (h93). However, depending on design errors, etc., it may be shorter than the length of the vertical frame member 13 (h93).

[0112] In the inner circumferential member (cover member) 933, the visible wall portions 933b, 933b are cut from the outer circumferential side in the lower region of the main body portion 933A to form a notch portion 933f.

[0113] The inner circumferential member (cover member) 933 engages with the inner circumference of the main vertical frame member 931 by engaging its engaging claws 933c, 933c with the engaging pieces 931c, 931d of the main vertical frame member 931 from the inner circumferential side. In this case, the inner circumferential member 933 can be fitted within the inner circumference of the main vertical frame member 931 without interfering with the sub-vertical frame member 932, as the notch portion 933f is located on the inner circumference side of the sub-vertical frame member 932 connected to the main vertical frame member 931.

[0114] Furthermore, the vertical frame member 93, in which the inner circumferential member 933 is positioned on the inner circumference of the main vertical frame member 931 and the sub-vertical frame member 932, has a fitting portion 93a formed on the side where the inner circumferential member 933 is not engaged in the depth direction, for accommodating the leading edge of the shoji screen 2, as shown in Figures 12(a) and 16. It is positioned between the upper inner circumferential surface B1 and the lower inner circumferential surface B2 of the opening and fixed to the vertical inner circumferential surface B3.

[0115] Since the configuration of the shoji screen in this embodiment is the same as that of the shoji screen in the third embodiment, we will use appropriate reference numerals here and omit a detailed explanation.

[0116] (Effects of the window in this embodiment) In this embodiment, the window is constructed by covering the interior and exterior surfaces of the outer perimeter of a sash made of fire-resistant glass with a metal frame, which makes it difficult for flames to form a pathway inside and outside the window, thus maintaining fire-resistant performance.

[0117] Furthermore, during a fire, metal frame materials, especially the relatively long vertical frame materials 93, are prone to expansion, and this expansion can potentially destroy the joinery. However, in this embodiment, the vertical frame material 93 is formed by movably connecting a metal secondary vertical frame material 932 below a metal main vertical frame material 931. Therefore, even if the vertical frame material 93 expands due to the heat during a fire, as shown in Figures 13(d), 17, and 18, the fixing means b93 connecting the main vertical frame material 931 and the secondary vertical frame material 932 shifts within the elongated hole 931e of the main vertical frame material 931, causing the connecting portion to move and absorb the expansion of the main vertical frame material 931. Therefore, in the event of a fire, it is possible to suppress damage to the building components caused by the expansion of the long vertical frame members 93, and to suppress communication between the interior and exterior of the building.

[0118] Furthermore, since the main vertical frame member 931 has a resin cover portion 931B at the end of the metal main body portion 931A, it prevents the exposure of the secondary vertical frame member 932, which is positioned on the inner circumference of the main vertical frame member 931, under normal circumstances, and in the event of a fire, it does not melt and hinder the absorption of thermal expansion by the main vertical frame member 931 and the secondary vertical frame member 932.

[0119] Furthermore, in this embodiment, the window has an inner perimeter member (cover member) 933 positioned on the inner perimeter of the main vertical frame member 931. This protects the inner perimeter of the vertical frame member 93 other than the fitting portion 93a that accommodates the door edge of the shoji screen 2, and protects the inner perimeter surface of the vertical frame member 93 where the shoji screen 2 is not placed, as well as the fixing portion where the vertical frame member 93 is fixed with screws or the like. Furthermore, the gap between the vertical frame material 93 and the inner and outer sash 2 is covered by the (cover member) 933, and a hollow section is formed by the main vertical frame material 931 and the inner peripheral member (cover member) 933, which makes it difficult for flames to pass through in the event of a fire, protects the fitting section 93a and improves fire resistance.

[0120] Furthermore, since the inner circumferential member 933 in this embodiment is provided with a resin end member 933B at its end, even if the inner circumferential member 933 expands due to heat during a fire at the inner circumferential position of the main vertical frame member 931, as shown in Figures 17 and 18, the end member 933B melts and can absorb the expansion of the inner circumferential member (cover member) 933. This suppresses damage to the building fixture due to the expansion of the inner circumferential member (cover member) 933 and prevents communication between the inside and outside of the building.

[0121] -Other Embodiments- The upper and lower frame members are not limited as long as they have a fixing portion for securing them to the inner surface of the opening and a guide portion for guiding the top and bottom of the sliding door. Furthermore, the cross-sectional shape of the left and right vertical frame members is not limited, as long as they form a visible wall section (recess) that covers the edge of the shoji screen from both the inside and outside.

[0122] Furthermore, the materials used for the upper frame, lower frame, and vertical frame are not particularly limited; they can be stainless steel, aluminum, or other flame-retardant materials.

[0123] It goes without saying that the embodiments described above are not intended to limit the inventions described in the claims, but are to be treated as illustrative examples. [Explanation of symbols]

[0124] 1: Frame material 2: Shoji (paper screen) 11: Upper frame material 111b: Visible wall section 121b: Visible wall section 114b: Visible wall section 12: Bottom frame material 121b: Visible wall section 122b: Visible wall section 124b: Visible wall section 13: Vertical frame material 131b: Visible wall section 132b: Visible wall section

Claims

[Claim 1] Equipped with a frame and shoji screens, The frame material has a visible wall portion fixed to the upper and lower inner circumferential surface of the opening, covering the upper and lower edges of the shoji screen from both the inside and outside, and has an upper and lower frame material that guides the shoji screen, and a vertical frame material consisting of a set of long members that has a visible wall portion fixed to the vertical inner circumferential surface of the opening, facing the vertical edge of the shoji screen. The shoji screen is made of fire-resistant glass, and when closed, the vertical edge on the door side is positioned between the visible wall portion of the vertical frame material.

Images