Sliding window device

Abstract

To improve fireproof performance of meeting parts of vertically adjacent sashes in a fully closed state of a window opening part in a projecting window device.SOLUTION: In a projecting window device including: a window frame made up of an upper frame 2, a lower frame 3 and right and left vertical frames 4, 5 to form a window opening part; and a plurality of vertically connected sashes 1 in the window frame to open / close the window opening part, a meeting part A is formed by bringing a lower rail 7 of the sash 1 positioned on the upper side and an upper rail 6 of the sash 1 positioned on the lower side into close contact with each other in a window opening part fully closed state, and a thermal expansion fire-resistant member 620 is provided on at least one of the lower rail 7 and the upper rail 6 that form the meeting part A over the width direction.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a window device, and more particularly to a sliding window device having fire resistance. [Background technology]

[0002] A window device opens and closes a window opening with a shoji screen. Window devices equipped with multiple shoji screens are known, and for example, Patent Document 1 describes a sliding window equipped with multiple shoji screens.

[0003] In some cases, window devices are required to have fire resistance when the window opening is fully closed, and it is necessary that no gaps that are disadvantageous in terms of fire prevention are formed between the outside space and the inside space separated by the shoji screen, even when heated for a specified period of time. [Patent Document 1] Utility model registration No. 2569062 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] The present invention aims to improve the fire prevention performance of the joints of adjacent shoji screens above and below when the window opening is fully closed in a sliding window device. [Means for solving the problem]

[0005] The technical means adopted by the present invention to achieve this object are: a window frame consisting of an upper frame, a lower frame, and left and right vertical frames, which forms a window opening; A plurality of shoji screens are connected vertically to the window frame to open and close the window opening; In a sliding window device comprising: When the window opening is fully closed, the lower frame of the upper shoji screen and the upper frame of the lower shoji screen are in close contact with each other to form a joint. At least one of the lower and upper frames forming the joint is provided with a thermally expandable fire-resistant member across the width. A sliding window device. The thermally expandable fire-resistant member may be provided on both the upper and lower frames, in which case, for example, one thermally expandable fire-resistant member is provided on the indoor side of the joining section, and the other thermally expandable fire-resistant member is provided on the outdoor side of the joining section.

[0006] In one embodiment, the lower and upper frames are formed from aluminum extrusions, A closed space facing the thermal expansion refractory member is formed in the joint portion, The indoor portion of the enclosed space is closed by an indoor airtight piece made of resin provided on one or both of the lower frame and the upper frame, In the outdoor portion of the enclosed space, an outdoor hanging piece integrally formed with the outdoor portion of the lower frame is positioned on the outdoor side of the upper end portion of the outdoor facing portion of the upper frame and faces the upper end portion, thereby forming a jutting structure; The thermally expandable fire-resistant member faces a portion of the enclosed space closer to the indoor side.

[0007] In one aspect, the lower frame comprises an indoor facing portion, an outdoor facing portion, and a bottom surface portion, and a resin indoor airtight piece is provided at the lower end of the indoor facing portion and protrudes downward from the bottom surface portion, and the outdoor hanging piece is integrally formed at the lower end of the outdoor facing portion and protrudes downward from the bottom surface portion, and a resin outdoor airtight piece is provided at the back surface of the outdoor hanging piece, The upper frame has an indoor facing portion, an outdoor facing portion, and an upper surface portion, and an indoor airtight piece made of resin is provided at the upper end of the indoor facing portion and protrudes above the upper surface portion, The closed space is formed between the lower surface of the lower frame and the upper surface of the upper frame, The indoor side portion of the enclosed space is closed by the indoor side airtight piece of the lower frame contacting the indoor side airtight piece of the upper frame, and the outdoor side portion of the enclosed space is closed by the outdoor side airtight piece contacting the outdoor side portion of the upper frame, and the lower end portion of the outdoor side hanging piece of the lower frame extends downward beyond the upper surface portion of the upper frame and faces the upper end portion of the outdoor side facing portion of the upper frame from the outdoor side, The thermally expandable fire-resistant member is provided on the upper surface of the upper frame or the lower surface of the lower frame, in a position closer to the interior of the room. [Effects of the Invention]

[0008] In this invention, a heat-expanding fire-resistant material is provided across the width of at least one of the lower and upper frames that form the joint of multiple shoji screens in a window device.Even if the upper and / or lower frames are deformed by the heat of a fire when the window opening is fully closed, or the resin sealing the indoor side of the space between the lower and upper frames melts, the heat-expanding fire-resistant material will foam and seal the space between the upper and lower frames, thereby preventing as much as possible the formation of gaps at the joint between the outdoor space and indoor space separated by the shoji screens that are disadvantageous in terms of fire prevention. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a front view of the window device in a fully closed state as viewed from the outside of the room. [Figure 2] FIG. 2 is a side view of the window device in an open state. [Figure 3] FIG. 2 is a vertical cross-sectional view of the window device in a fully closed state. [Figure 4] FIG. 4 is a partially enlarged view of the joining portion of the upper and lower shoji screens in FIG. 3. [Figure 5] FIG. 2 is a cross-sectional view of the window device in a fully closed state. [Figure 6] 4, and is a view illustrating the function and effect of the thermal expansion fire-resistant member at the joint. The bottom and top frames formed from aluminum extrusions are shown painted black. DETAILED DESCRIPTION OF THE INVENTION

[0010] [A] Basic structure of the window device [A-1] Overall configuration of the window device As shown in Figure 1, the window device is composed of a window frame and a plurality of panels or shoji screens 1 (two screens are shown in Figure 1) that open and close the window opening formed by the window frame. There is no limit to the number of shoji screens 1 that make up the window device, and for example, a window device may include three or more shoji screens. The window device according to this embodiment has fire resistance, and the fire prevention configuration will be described later.

[0011] The window frame is made up of an upper frame 2, a lower frame 3, and left and right vertical frames 4 and 5, and a vertical rectangular window opening is formed surrounded by the upper frame 2, lower frame 3, and left and right vertical frames 4 and 5. The shoji screen 1 is made up of a horizontal rectangular frame made up of an upper frame 6, a lower frame 7, and left and right vertical frames 8 and 9, and a glass panel 10 fitted into the horizontal rectangular area surrounded by the frame, and the window opening is opened and closed by multiple shoji screens 1 connected vertically.

[0012] In this embodiment, the window frame and the frame of the shoji screen 1 are formed from aluminum shaped material (hereinafter referred to as "aluminum shaped material"). The glass plate 10 has an interior side surface 100, an exterior side surface 101, an upper end surface 102, a lower end surface 103, and side end surfaces in the width direction. The glass plate 10 in this embodiment is a double-layered composite glass, but the glass plate 10 may also be a single-layer glass.

[0013] 2, 3, 4, and 6, the right side is the indoor side and the left side is the outdoor side. In Fig. 5, the lower side is the indoor side and the upper side is the outdoor side. It should be noted that in this specification, the expressions "indoor side" and "outdoor side" are used to specify the relative position and direction of a component or part of a component, in addition to when the component is actually located on the indoor side or outdoor side.

[0014] [A-2] Opening and closing mechanism of the window device according to this embodiment The window device according to this embodiment is a sliding window. Each shoji screen 1 can rotate back and forth around its upper end as a pivot point, and the pivot point can also be moved up and down via left and right opening and closing operation bars 11 (see Figures 2 and 5) that are provided so as to be movable up and down along the left and right vertical frames 4 and 5 of the window frame.

[0015] Each shoji screen 1 is connected to the window frame via a connecting mechanism provided between the left and right vertical frames 4, 5 of the window frame and the left and right vertical stiles 8, 9 of each shoji screen 1. As shown in Figure 2, the connecting mechanism has an opening / closing operation bar 11, a first arm 12, a second arm 13, a base 14, a bracket 15, and an operating plate 16. The base 14 is fixed to the vertical frames 4, 5. A vertically extending elongated hole 140 is formed in the base 14, and the upper end of the elongated hole 140 is inclined toward the room.

[0016] The first arm 12 is connected to the upper portions of the vertical frames 8 and 9 of the shoji screen 1, and the upper end of the first arm 12 is connected to the base 14 via an engagement pin 120 so as to be rotatable and slidable up and down. The engagement pin 120, which protrudes from the top of the first arm 12, is slidably fitted into and guided by an elongated hole 140 in the base 14. When the engagement pin 120 is located at the upper end of the elongated hole 140 in the base 14, the shoji screen 1 is in an upright position, closing the window opening. When the engagement pin 120 is located at the lower end of the elongated hole 140, the shoji screen 1 is in an inclined position, opening the window opening (see Figure 2). The upper end of the second arm 13 is rotatably connected to a portion below the center of the first arm 12. The lower end of the second arm 13 is rotatably connected to a bracket 15 fixed to the vertical frames 4 and 5.

[0017] The operating plate 16 is provided at a position on the opening / closing operation bar 11 corresponding to the upper end of each shoji screen 1 so as to protrude from the opening / closing operation bar 11 toward the outside of the room. As the opening / closing operation bar 11 moves up and down, the operating plate 16 moves up and down, moving the engagement pin 120 up and down. An oblong hole 160 is formed in the operating plate 16, and the operating plate 16 is interposed between the base 14 and the upper end of the first arm 12. The engagement pin 120 is slidably fitted into the oblong hole 160 and is guided by the oblong hole 160. When the opening / closing operation bar 11 moves downward to move the operating plate 16 a predetermined distance, the engagement pin 120 moves downward through the oblong hole 140 in the base 14, the first arm 12 rotates outward about the engagement pin 120, and the second arm 13 rotates outward about its lower end, tilting the shoji screen 1 to open the opening.

[0018] An operating mechanism that moves the opening / closing operation bar 11 up and down is connected to the lower end of the opening / closing operation bar 11. The operating mechanism is a bending / extending mechanism consisting of a link 17, the upper end of which is rotatably connected to the left and right opening / closing operation bars 11, and a pivot arm 18, the upper end of which is rotatably connected to the lower end of the link 17 and the lower end of which serves as a pivot point. An operating mechanism is connected to the lower end of each of the left and right opening / closing operation bars 11, and the left and right operating mechanisms are linked by a pivot shaft 19 that connects the pivot points at the lower ends of the left and right pivot arms 18. One of the operating mechanisms is provided with an operating handle H that bends and extends the bending / extending mechanism consisting of the link 17 and the pivot arm 18 up and down via a transmission mechanism. The left and right operating mechanisms, the pivot shaft 19 that links the left and right operating mechanisms, and the operating handle H that bends and extends one of the operating mechanisms make up the opening / extending operation mechanism for the shoji screen 1. By rotating the operating handle H, the left and right links 17 and the rotary arms 18 are bent and stretched, and the left and right opening / closing operating bars 11 are moved downward or upward.

[0019] [B] Window frame details The upper frame 2 of the window frame is a long member extending horizontally in the width direction of the opening, and as shown in Figure 3, it comprises an indoor-side facing portion 20, a lower surface portion 21 extending horizontally from the lower end of the indoor-side facing portion 20 toward the outside, and an upper surface portion 22 extending from the upper end of the indoor-side facing portion 20 toward the outside. The upper surface portion 22 extends toward the outside of the room relative to the lower surface portion 21, and an outdoor-side facing portion 23 is integrally formed on the outdoor side of the upper surface portion 22. An indoor-side sealing material S1 is attached to the tip of the lower surface portion 21 across the width. An outdoor-side sealing material S2 is attached to the lower portion of the outdoor-side facing portion 23 across the width.

[0020] The lower frame 3 of the window frame is a long member extending horizontally across the width of the window opening. As shown in Figure 3, the lower frame 3 comprises a vertical interior facing portion 30, an upper surface portion 31 extending horizontally from an upper portion of the interior facing portion 30 toward the exterior, and a lower surface portion 32 extending from a lower portion of the interior facing portion 30 toward the exterior. The lower surface portion 32 extends toward the exterior relative to the upper surface portion 31, and an exterior facing portion 33 is integrally formed below the lower surface portion 32 on the exterior side of the lower surface portion 32. An interior sealing material S3 is attached to the tip of the upper surface portion 31 across the width. A bent piece 320 is integrally formed at the exterior end of the lower surface portion 32.

[0021] The vertical frame 4 of the window frame is a long member extending perpendicular to the opening height direction. As shown in Figure 5, the vertical frame 4 comprises an interior facing portion 40, an interior facing piece 41 extending from the inside of the interior facing portion 40 toward the exterior, and an exterior facing portion 42 extending from the outside of the interior facing portion 40 toward the exterior. The exterior facing portion 42 extends toward the exterior relative to the interior facing piece 41, and an exterior facing portion 43 extends outward from the exterior end of the exterior facing portion 42. An interior sealing material S4 is attached to the tip of the interior facing piece 41 of the vertical frame 4 along the height direction. An exterior sealing material S5 is attached to the exterior portion of the exterior facing portion 42 of the vertical frame 4 along the height direction.

[0022] The vertical frame 5 of the window frame is a long member extending perpendicular to the opening height direction. As shown in Figure 5, the vertical frame 5 has an interior facing portion 50, an interior facing surface 51 extending from the inside of the interior facing portion 50 toward the exterior, and an exterior facing surface 52 extending from the outside of the interior facing portion 50 toward the exterior. The exterior facing surface 52 extends toward the exterior relative to the interior facing surface 51, and an exterior facing portion 53 extends outward from the exterior end of the exterior facing surface 52. An interior sealing material S6 is attached to the tip of the interior facing surface 51 of the vertical frame 5 along the height direction. An exterior sealing material S7 is attached to the exterior portion of the exterior facing surface 52 of the vertical frame 5 along the height direction.

[0023] [C] Details of the Shoji screen [C-1] Composition of the upper frame and upper end of the shoji screen The upper frame 6 of the shoji screen 1 is a long member extending in the width direction of the shoji screen 1, and as shown in Figure 4, it comprises an interior facing portion 60, an exterior facing portion 61, an upper surface portion 62 connecting the upper ends of the interior facing portion 60 and the exterior facing portion 61, and an intermediate upper surface 63 spaced below the upper surface portion 62 and connecting the interior facing portion 60 and the exterior facing portion 61, with a hollow portion formed between the upper surface portion 62 and the intermediate upper surface 63. The lower ends of the interior facing portion 60 and the exterior facing portion 61 face each other at a distance, and the upper end of the glass plate 10 is received and fixed between the lower ends of the interior facing portion 60 and the exterior facing portion 61.

[0024] An indoor-side gasket (herein, gasket can be interchangeably referred to as "fixing sealant") G1 is provided at the lower end of the indoor-side facing portion 60, and an outdoor-side gasket G2 is provided at the lower end of the outdoor-side facing portion 61. The upper end of the glass plate 10 is sandwiched between the indoor-side gasket G1 and the outdoor-side gasket G2, with the indoor-side gasket G1 in close contact with the upper end of the indoor-side facing portion 100 of the glass plate 10, and the outdoor-side gasket G2 in close contact with the upper end of the outdoor-side facing portion 101 of the glass plate 10. In this embodiment, the indoor-side gasket G1 is made of resin, and a pocket is formed at the lower end of the indoor-side facing portion 60 facing the indoor-side gasket G1. A thermally expansive fire-resistant member 600 is provided in this pocket over the entire length of the upper frame 6. The outdoor-side gasket G2 is a composite material made of resin and a thermally expansive fire-resistant material. The upper end surface 102 of the glass plate 10 and the middle upper surface 63 face each other at a distance, and a pocket is formed on the underside of the middle upper surface 63 facing the upper end surface 102 of the glass plate 10, and a thermally expandable fire-resistant member 630 is provided in the pocket over the entire length of the upper frame 6. Heat during a fire causes the thermally expandable fire-resistant members 630, 600 and the thermally expandable fire-resistant member of the outdoor gasket G2 to foam, creating a gap between the upper frame 6 of the shoji screen 1 and the upper end of the glass plate 10 in the event of a fire, preventing communication between the indoor and outdoor spaces as much as possible.

[0025] A pocket portion that is dish-shaped or concave in cross section is provided along the entire length of the upper surface 62 of the upper frame 6, closer to the interior of the room, and a thermal expansion fire-resistant member 620 is provided in the pocket portion along the entire length of the upper frame 6. The upper frame 6 is provided with an indoor side surface portion 64 made of resin, located on the indoor side of the indoor facing portion 60 of the upper frame 6, so as to cover the indoor facing portion 60. The upper end portion of the indoor side surface portion 64 forms an indoor airtight piece 640 that extends upward beyond the upper surface portion 62.

[0026] Although the upper frame 6 of the lower shoji screen 1 has been described above, the structure of the upper frame 6 of the upper shoji screen 1 is essentially the same. As shown in Figure 3, when the shoji screen 1 is in the fully closed position, the indoor-side sealant S1 of the upper frame 2 abuts against the indoor-side airtight piece 640 of the upper frame 6 of the upper shoji screen 1, and the outdoor-side sealant S2 of the upper frame 2 abuts against the corner (including the protruding piece 621) between the outdoor-side facing part 61 and the upper surface part 62 of the upper frame 6 of the upper shoji screen 1, so that the upper frame 6 of the top shoji screen 1 is in close contact with the upper frame 2 of the window frame.

[0027] [C-2] Composition of the bottom frame and bottom end of the shoji screen The bottom frame 7 of the shoji screen 1 is a long member extending in the width direction of the shoji screen 1, and as shown in Figure 4, it comprises an interior facing portion 70, an exterior facing portion 71, a bottom surface portion 72 connecting the lower portions of the interior facing portion 70 and the exterior facing portion 71, and an intermediate bottom surface 73 spaced above the bottom surface 72 and connecting the interior facing portion 70 and the exterior facing portion 71, with a hollow portion formed between the bottom surface 72 and the intermediate bottom surface 73. The upper end portions of the interior facing portion 70 and the exterior facing portion 71 face each other at a distance, and the lower end portion of the glass plate 10 is received and fixed between the upper end portions of the interior facing portion 70 and the exterior facing portion 71.

[0028] An indoor gasket G3 is provided at the upper end of the indoor facing portion 70, and an outdoor gasket G4 is provided at the upper end of the outdoor facing portion 71. The lower end of the glass plate 10 is sandwiched between the indoor gasket G3 and the outdoor gasket G4, with the indoor gasket G3 in close contact with the lower end of the indoor side surface 100 of the glass plate 10, and the outdoor gasket G4 in close contact with the lower end of the outdoor side surface 101 of the glass plate 10. In this embodiment, the indoor gasket G3 is made of resin, and a pocket is formed at the upper end of the indoor facing portion 70 facing the indoor gasket G3. A thermally expandable fire-resistant member 700 is provided in this pocket over the entire length of the lower frame 7. The outdoor gasket G4 is a composite material made of resin and a thermally expandable fire-resistant material.

[0029] A pocket is formed on the upper surface of the intermediate lower surface 73, facing the lower end surface 103 of the glass pane 10. A thermally expandable fire-resistant member 730 is provided in the pocket along the length of the sash 7. A plurality of setting blocks 731 (two in this embodiment) are provided on the intermediate lower surface 73, positioned above the thermally expandable fire-resistant member 730 and spaced apart in the width direction. The lower end surface 103 of the glass pane 10 rests on the setting blocks 731, and the glass pane 10 is supported by the setting blocks 731. Heat during a fire causes the thermally expandable fire-resistant members 730, 700, and the thermally expandable fire-resistant member of the outdoor gasket G4 to foam. This creates a gap between the sash 7 of the shoji screen 1 and the lower end of the glass pane 10, preventing communication between the indoor and outdoor spaces.

[0030] The lower frame 7 is provided with a resin indoor side surface portion 74 located on the indoor side of the indoor facing portion 70 of the lower frame 7, covering the indoor facing portion 70. A pocket portion that protrudes downward from the indoor end of the lower surface portion 72 of the lower frame 7 and opens to the indoor side is integrally formed across the entire width of the lower frame 7, and a resin indoor airtight piece 75 is provided in the pocket portion adjacent to the lower side of the indoor side surface portion 74 and across the entire width of the lower frame 7. The lower end portion of the outdoor facing portion 71 of the lower frame 7 forms an outdoor hanging piece 710 that extends downward beyond the lower surface portion 72. A pocket portion is provided on the inside of the base end portion (upper end portion) of the outdoor hanging piece 710 and extends across the entire width of the lower frame 7, and a resin outdoor airtight piece 76 is provided in this pocket portion. The lower end of the outdoor hanging piece 710 is located lower than the lower end of the outdoor airtight piece 76 .

[0031] When multiple shoji screens 1 are in the fully closed position, the upper surface 62 of the upper frame 6 of the lower shoji screen 1 and the lower surface 72 of the lower frame 7 of the upper shoji screen 1 face each other with a gap between them, the interior airtight piece 75 of the upper frame 6 of the lower shoji screen 1 abuts against the interior airtight piece 640 on the interior side surface 64 of the lower frame 7 of the upper shoji screen 1, the exterior protruding piece 621 of the upper frame 6 of the lower shoji screen 1 abuts against the exterior airtight piece 76 of the lower frame 7 of the upper shoji screen 1, and the exterior hanging piece 710 of the lower frame 7 of the upper shoji screen 1 is located on the exterior side of the upper portion of the exterior facing portion 61 of the upper frame 6 of the lower shoji screen 1 and hangs down opposite to said upper portion. In this way, the lower frame 7 of the upper shoji screen 1 and the upper frame 6 of the lower shoji screen 1 are in close contact with each other, forming a joint A.

[0032] While the lower frame 7 of the upper shoji screen 1 has been described above, the structure of the lower frame 7 of the lower shoji screen 1 is essentially the same, except for a few points described below. When the shoji screen 1 is in the fully closed position, the indoor-side sealing material S3 of the lower frame 3 abuts against the indoor side surface 74 of the lower frame 7 of the lower shoji screen 1, and the outdoor airtight piece 76' provided in the pocket on the inside of the base end (upper end) of the outdoor-side hanging piece 710 extends downward beyond the lower end of the outdoor-side hanging piece 710, and its lower end abuts against the bent piece 320 formed on the outdoor-side end of the lower surface 32 of the frame 3, so that the lower frame 7 of the lowest shoji screen 1 is in close contact with the lower frame 3 of the window frame. Note that the indoor-side airtight piece 75 is not provided in the indoor-side pocket of the lower frame 7 of the lower (lowest) shoji screen 1.

[0033] [C-3] Composition of the vertical frame and side edge of the shoji screen The vertical frame 8 of the shoji screen 1 comprises an interior facing portion 80, an exterior facing portion 81, a side end face 82 connecting the exterior portions of the interior facing portion 80 and the exterior facing portion 81 in the facing direction, and an intermediate facing surface 83 spaced inward from the side end face 82 in the facing direction and connecting the interior facing portion 80 and the exterior facing portion 81, with a hollow portion formed between the side end face 82 and the intermediate facing surface 83. The exterior facing portion 81 is integrally formed with a protrusion 810 that protrudes outward from the side end face 82. The interior end of the interior facing portion 80 and the interior end of the exterior facing portion 81 face each other at a distance, and one side end of the glass pane 10 is received and fixed between the interior end of the interior facing portion 80 and the interior end of the exterior facing portion 81.

[0034] An indoor-side gasket G5 is provided at the inner end of the indoor-side facing portion 80, and an outdoor-side gasket G6 is provided at the inner end of the outdoor-side facing portion 81. One side edge of the glass plate 10 is sandwiched between the indoor-side gasket G5 and the outdoor-side gasket G6, with the indoor-side gasket G5 in close contact with one side edge of the indoor-side surface 100 of the glass plate 10, and the outdoor-side gasket G6 in close contact with one side edge of the outdoor-side surface 101 of the glass plate 10. In this embodiment, the indoor-side gasket G5 is made of resin, and a pocket is formed at the inner end of the indoor-side facing portion 80 in the close contact direction, facing the indoor-side gasket G5. A thermally expandable fire-resistant member is provided in this pocket over the entire length of the vertical frame 8. The outdoor-side gasket G6 is a composite material made of resin and a thermally expandable fire-resistant material. One side edge of the glass plate 10 faces the middle visible surface 83 at a distance, and a pocket is formed in the middle visible surface 83, and a thermally expandable fire-resistant member is provided in the pocket along its height. The heat generated during a fire causes the thermally expandable fire-resistant member and the thermally expandable fire-resistant member of the outdoor gasket G6 to foam, creating a gap between the vertical frame 8 of the shoji screen 1 and one side edge of the glass plate 10, preventing communication between the indoor and outdoor spaces as much as possible.

[0035] When the shoji screen 1 is in the fully closed position, the indoor facing portion 80 of the vertical frame 8 of the shoji screen 1 abuts against the indoor facing sealing material S4 of the vertical frame 4, and the protruding portion 810 of the outdoor facing portion 81 abuts against the outdoor sealing material S5, so that the vertical frame 8 of the shoji screen 1 is in close contact with the vertical frame 4 of the window frame. A pocket is formed on the back of the protruding portion 810 of the outdoor facing portion 81 across the height, and this pocket is fitted with a thermally expandable fire-resistant member.

[0036] The vertical frame 9 of the shoji screen 1 has an interior facing portion 90, an exterior facing portion 91, a side end face 92 connecting the exterior portions of the interior facing portion 90 and the exterior facing portion 91 in the facing direction, and an intermediate facing surface 93 spaced inward from the side end face 92 in the facing direction and connecting the interior facing portion 90 and the exterior facing portion 91, with a hollow portion formed between the side end face 92 and the intermediate facing surface 93. The exterior facing portion 91 is integrally formed with a protrusion 910 that protrudes outward from the side end face 92. The interior end of the interior facing portion 90 and the interior end of the exterior facing portion 91 face each other at a distance, and the other side end of the glass plate 10 is received and fixed between the interior end of the interior facing portion 90 and the interior end of the exterior facing portion 91.

[0037] An indoor-side gasket G7 is provided at the inner end of the indoor-side facing portion 90, and an outdoor-side gasket G8 is provided at the inner end of the outdoor-side facing portion 91. The other side edge of the glass plate 10 is sandwiched between the indoor-side gasket G7 and the outdoor-side gasket G8, with the indoor-side gasket G7 in close contact with the other side edge of the indoor-side surface 100 of the glass plate 10, and the outdoor-side gasket G8 in close contact with the other side edge of the outdoor-side surface 101 of the glass plate 10. In this embodiment, the indoor-side gasket G7 is made of resin, and a pocket is formed at the inner end of the indoor-side facing portion 90 in the close contact direction, facing the indoor-side gasket G7. A thermally expandable fire-resistant member is provided in this pocket over the entire length of the vertical frame 9. The outdoor-side gasket G8 is a composite material made of resin and a thermally expandable fire-resistant material. The other side edge of the glass plate 10 and the middle visible surface 93 face each other at a distance, and a pocket is formed on the middle visible surface 93 facing the other side edge of the glass plate 10, and a thermally expandable fire-resistant member is provided in the pocket along its height. The heat generated during a fire causes the thermally expandable fire-resistant member and the thermally expandable fire-resistant member of the outdoor gasket G8 to foam, creating a gap between the vertical frame 9 of the shoji screen 1 and the other side edge of the glass plate 10, preventing communication between the indoor and outdoor spaces as much as possible.

[0038] When the shoji screen 1 is in the fully closed position, the indoor facing portion 90 of the vertical stile 9 of the shoji screen 1 abuts against the indoor facing sealing material S6 of the vertical frame 5, and the protruding portion 910 of the outdoor facing portion 91 abuts against the outdoor sealing material S7, so that the vertical stile 9 of the shoji screen 1 is in close contact with the vertical frame 5 of the window frame. A pocket is formed on the back of the protruding portion 910 of the outdoor facing portion 91 across the height, and this pocket is fitted with a thermally expandable fire-resistant member.

[0039] [D] Fire prevention structure of joint The window device according to this embodiment comprises a window frame that forms a window opening and is made up of an upper frame 2, a lower frame 3, and left and right vertical frames 4, 5, and multiple shoji screens 1 that are connected to the window frame in the vertical direction and open and close the window opening. When the window opening is fully closed, the upper frame 6 of the top shoji screen 1 is in close contact with the upper frame 2, and the lower frame 7 of the lowest shoji screen 1 is in close contact with the lower frame 3, and the lower frame 7 of the upper shoji screen 1 and the upper frame 6 of the lower shoji screen 1 are in close contact with each other to form a joint A. In this state, if the sliding window device is exposed to heat during a fire for a certain period of time, the upper and lower frames 6 and 7 that extend horizontally of the shoji screen 1 may be deformed by the heat, and if the upper and lower frames 6 and 7 that form the joint A are deformed, a gap may be created in the joint A. In this embodiment, a heat-expanding fire-resistant member 620 is provided facing the space formed at the joint A, so that when the joint A is exposed to the heat of a fire, the heat-expanding fire-resistant member 620 foams and seals the space between the upper frame 6 and the lower frame 7, thereby preventing as much as possible the formation of gaps at the joint A that are disadvantageous in terms of fire prevention between the outdoor space and the indoor space separated by the shoji screen 1.

[0040] The effects of the thermal expansion fireproof member 620 according to this embodiment will be described in more detail with reference to Figure 6. The bottom frame 7 and top frame 6 of the shoji screen 1 according to this embodiment are formed from aluminum extrusions (shown in black in Figure 6). The bottom frame 7 includes an interior facing portion 70, an exterior facing portion 71, and a bottom surface 72. The lower end of the interior facing portion 70 is provided with a resin interior airtight piece 75 that protrudes downward from the bottom surface 72. The lower end of the exterior facing portion 71 is integrally formed with an exterior hanging piece 710 that protrudes downward from the bottom surface 72. A resin exterior airtight piece 76 is provided behind the exterior hanging piece 710 (on the inside or interior side), and the exterior hanging piece 710 is positioned on the exterior side of the exterior airtight piece 76, covering the entire exterior airtight piece 76. The upper frame 6 has an indoor facing portion 60, an outdoor facing portion 61, and an upper surface portion 62, and at the upper end of the indoor facing portion 60 is provided an indoor airtight piece 640 made of resin that protrudes above the upper surface portion 62. A pocket portion is formed in the indoor half of the upper surface portion 62 of the upper frame 6, spanning the entire width of the upper frame 6, and a thermal expansion fire-resistant member 620 is provided in this pocket portion. In the illustrated embodiment, a pocket portion is formed slightly toward the outdoor side of the lower surface portion 72, and a thermal expansion fire-resistant member may be provided in this pocket portion.

[0041] At the joint A, a closed space S is formed between the lower surface 72 of the lower frame 7 and the upper surface 62 of the upper frame 6, and the indoor side of the closed space S is closed by the indoor side airtight piece 75 on the lower frame 7 and the indoor side airtight piece 640 on the upper frame 6 overlapping and contacting each other, and the outdoor side of the closed space S is closed by the outdoor side airtight piece 76 contacting the outdoor side of the upper frame 6 (the outdoor side protrusion 621).Furthermore, the lower end portion of the outdoor side hanging piece 710 of the lower frame 7 extends downward beyond the upper surface 62 of the upper frame 6, forming a clasp structure facing the upper end portion of the outdoor side visible part 61 of the upper frame 6 from the outdoor side.

[0042] The indoor portion of the enclosed space S formed at the joint A in this embodiment is sealed with resin (indoor airtight piece 75, indoor airtight piece 640) and is susceptible to heat. If the indoor airtight piece 75 or the upper indoor airtight piece 640 melts or disappears during a fire, a gap may form in the indoor portion of the enclosed space S. On the other hand, the outdoor portion of the enclosed space S is sealed with resin (outdoor airtight piece 76), but the outdoor hanging piece 710 is positioned to cover the outdoor airtight piece 76 from the outside, and the outdoor hanging piece 710 forms a gap structure with the upper end of the outdoor facing part 61 of the upper frame 6. Therefore, even if the outdoor airtight piece 76 melts or disappears during a fire, the gap structure is maintained, preventing the formation of a linear gap in the outdoor portion of the enclosed space S.

[0043] The thermal expansion fire-resistant member 620 according to this embodiment is located on the indoor half of the upper surface 62 of the upper frame 6, and faces the portion of the enclosed space S closer to the indoor side (near the indoor airtight plate 75 and the indoor airtight plate 640). Therefore, if the indoor side portion of the joint A is exposed to heat during a fire and the indoor airtight plate 75 and the indoor airtight plate 640 melt, the thermal expansion fire-resistant member 620 is simultaneously exposed to heat and foams, thereby sealing off the indoor side portion of the enclosed space S. Therefore, even if the heat during a fire causes the upper frame 6 or the lower frame 7 to deform and enlarge the gap, or if the indoor airtight plate 75 and the upper indoor airtight plate 640 melt, by sealing the space between the upper frame 6 and the lower frame 7, the formation of a gap at the joint A that would be detrimental to fire safety, such as a gap penetrating the outdoor space and the indoor space, is prevented as much as possible. [Explanation of symbols]

[0044] 1 Shoji screen 2 Upper frame 3 Bottom frame 4, 5 Vertical frame 6 Upper frame of shoji screen 60 Interior facing part 61 Exterior facing part 62 Top part 620 Thermal expansion fire-resistant materials 640 Indoor airtight sheet 7. Shoji bottom frame 70 Interior facing section 71 Exterior facing part 710 Outdoor hanging piece 72 Bottom part 75 Indoor airtight sheet 76 Outdoor airtight sheet A. Mixed Meal Section S closed space

Claims

1. a window frame consisting of an upper frame, a lower frame, and left and right vertical frames, which forms a window opening; A plurality of shoji screens are connected vertically to the window frame to open and close the window opening; In a sliding window device comprising: When the window opening is fully closed, the lower frame of the upper shoji screen and the upper frame of the lower shoji screen are in close contact with each other to form a joint. At least one of the lower and upper frames forming the joint is provided with a thermal expansion refractory member across the width, The lower and upper frames are formed from aluminum extrusions, A closed space facing the thermal expansion refractory member is formed in the joint portion, The indoor portion of the enclosed space is closed by an indoor airtight piece made of resin provided on one or both of the lower frame and the upper frame, In the outdoor portion of the enclosed space, an outdoor hanging piece integrally formed with the outdoor portion of the lower frame is positioned on the outdoor side of the upper end portion of the outdoor facing portion of the upper frame and faces the upper end portion, thereby forming a jutting structure; The thermal expansion fire-resistant member faces a portion of the enclosed space closer to the indoor side. Sliding window device.

2. The lower frame has an indoor facing portion, an outdoor facing portion, and a bottom surface portion, and a resin indoor airtight piece is provided at the lower end of the indoor facing portion and protrudes downward from the bottom surface portion, and the outdoor hanging piece is integrally formed at the lower end of the outdoor facing portion and protrudes downward from the bottom surface portion, and a resin outdoor airtight piece is provided at the back surface of the outdoor hanging piece, The upper frame has an indoor facing portion, an outdoor facing portion, and an upper surface portion, and an indoor airtight piece made of resin is provided at the upper end of the indoor facing portion and protrudes above the upper surface portion, The closed space is formed between the lower surface of the lower frame and the upper surface of the upper frame, The indoor side portion of the enclosed space is closed by the indoor side airtight piece of the lower frame contacting the indoor side airtight piece of the upper frame, and the outdoor side portion of the enclosed space is closed by the outdoor side airtight piece contacting the outdoor side portion of the upper frame, and the lower end portion of the outdoor side hanging piece of the lower frame extends downward beyond the upper surface portion of the upper frame and faces the upper end portion of the outdoor side facing portion of the upper frame from the outdoor side, The thermal expansion fireproof member is provided on the upper surface of the upper frame or the lower surface of the lower frame, at a position closer to the indoor side.

2. The sliding window device according to claim 1.

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