Building materials

Abstract

To provide a fixture capable of improving anti-fire performance.SOLUTION: The fixture includes: a window frame; a first sash that is supported slidably by the window frame, and is placed at the indoor side of the window frame when closed; a second sash that is supported by the window frame slidably and is placed at the outdoor side of the window frame when closed; a metal crescent attached to the first sash; and a metal crescent receiver that is attached to a stile of the second sash and with which the crescent is engaged. The stile includes: an opening groove for holding the edge of a plane material; a metal opening groove reinforcement extending along the longitudinal direction of the connecting frame, which is placed in the opening groove; and a regulating member that regulates relative movement between the crescent holder and the opening groove reinforcing material in the sliding direction of the second sash.SELECTED DRAWING: Figure 10B

Description

[Technical Field]

[0001] The present invention relates to a fixture comprising a crescent and a crescent holder. [Background technology]

[0002] Patent Document 1 discloses a double-hung window fixture in which the outer and inner shoji screens can be locked with a crescent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6023647 Summary of the Invention [Problem to be solved by the invention]

[0004] In the event of a fire, the outer shoji screen located on the upper exterior side of the double-hung window described above is susceptible to heat and may fall off or drop. If the outer shoji screen falls off, a hole will be created that allows flames and smoke to pass between the interior and exterior. This type of fire safety problem can also occur in fittings such as sliding windows, which have two sliding screens that can be slid apart. For example, in the case of a sliding window, if the shoji screen tilts due to a fire, a gap will form between the screen and the frame, which can become the aforementioned hole.

[0005] The present invention has been made in consideration of the above-mentioned problems of the conventional technology, and has an object to provide a building material that can improve fire resistance. [Means for solving the problem]

[0006] A fixture according to one aspect of the present invention comprises a window frame, a first shoji screen slidably supported on the window frame and positioned on the indoor side of the window frame when closed, a second shoji screen slidably supported on the window frame and positioned on the outdoor side of the window frame when closed, a metal crescent attached to the first shoji screen, and a metal crescent holder attached to the joint frame of the second shoji screen with which the crescent engages, wherein the joint frame of the second shoji screen has an opening groove that holds the edge of the face material, a metal opening groove reinforcement member that is positioned in the opening groove and extends along the longitudinal direction of the joint frame, and a restricting member that restricts the relative movement of the crescent holder and the opening groove reinforcement member in the sliding direction of the second shoji screen. [Effects of the Invention]

[0007] According to the above aspect of the present invention, fire prevention performance can be improved. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a vertical cross-sectional view of a fitting according to one embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the fitting shown in FIG. 1. [Figure 3] This is a vertical cross-sectional view of an outer screen. [Figure 4] This is an enlarged front view of a portion of the outer shoji screen. [Figure 5] This is an enlarged oblique view of the crescent holder attached to the outer shoji screen and its surrounding area. [Figure 6A] This is an enlarged oblique view of the sliding parts of the outer screen and their surrounding area. [Figure 6B] FIG. 6B is a perspective view of the sliding element shown in FIG. 6A with the main body portion omitted. [Figure 7] FIG. [Figure 8] 10A and 10B are side cross-sectional views showing the operation of connecting a terminal member to a connecting fitting. [Figure 9] 10 is a plan view showing the relationship between the locking hole and the elongated hole of the connecting fitting and the terminal member. FIG. [Figure 10A]This is an enlarged plan view of the central part of the lower frame. [Figure 10B] FIG. 10B is a side cross-sectional view of the lower stile shown in FIG. 10A. [Figure 11] FIG. 10 is an enlarged plan view of the central portion of the lower frame according to the first modified example. [Figure 12A] FIG. 10 is an enlarged plan view of the central portion of the lower frame according to the second modified example. [Figure 12B] FIG. 12B is a side cross-sectional view of the lower stile shown in FIG. 12A. [Figure 13A] This is an exploded perspective view showing the connecting structure between the upper frame and the vertical frame. [Figure 13B] 13B is a perspective view showing the state in which the opening groove reinforcements shown in FIG. 13A are connected to each other and the upper frame and vertical frame are further connected. FIG. [Figure 14] This is an enlarged vertical cross-sectional view of the lower frame of the door frame and its surrounding area. [Figure 15] This is a plan view of the bottom frame of the door frame. [Figure 16] This is a front view of the bottom frame of the door frame. DETAILED DESCRIPTION OF THE INVENTION

[0009] BEST MODE FOR CARRYING OUT THE INVENTION A fitting according to a preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0010] 1. Description of the overall structure of the building materials First, the overall configuration of the fitting 10 according to one embodiment will be described.

[0011] 1 and 2, the fitting 10 of this embodiment comprises an opening frame 12 fixed to an opening in a building skeleton, a door body 14 supported by the opening frame 12 so as to be able to open and close, and a ventilation unit 16 attached to the door body 14. The fitting 10 is used, for example, as a back door.

[0012] In this application, the "inward direction" refers to the depth direction of the fitting 10 (the direction indicated by arrow Z in the figure), and the "inward surface" refers to a surface extending along the inward direction. The "inward direction" refers to a direction perpendicular to the inward direction. In the case of vertically elongated vertical frames 28c and vertical stiles 39c, the "inward direction" refers to the left-right direction perpendicular to their longitudinal direction (the direction indicated by arrow X in the figure). In the case of horizontally elongated upper frames 28a and upper stiles 39a, the "inward direction" refers to the up-down direction perpendicular to their longitudinal direction (the direction indicated by arrow Y in the figure). The "inward surface" refers to a surface along the inward direction. The "inner frame" refers to the inner portion of a frame-shaped member such as the window frame 28. The "outer frame" refers to the outer portion of a frame-shaped member such as the window frame 28, for example, the outer peripheral portion supported by the door frame stile 20 of the window frame 28. The "inward frame direction" refers to the direction from the outer frame of the frame-shaped member toward the inner frame. The "outer frame direction" refers to the direction from the inner frame of the frame-shaped member toward the outer frame.

[0013] As shown in Figures 1 to 3, the opening frame 12 is made up of an upper frame 12a, a lower frame 12b, and left and right vertical frames 12c and 12d. Each of the frames 12a to 12d is an extruded member made of an aluminum alloy or the like. A resin attachment member 18 made of polyvinyl chloride resin (PVC) or the like is attached to the interior side of the frame inner visible surface of each of the frames 12a to 12c.

[0014] 1 and 2, the door body 14 is a single-wing door that is supported by the opening frame 12 and can be opened and closed in the front direction. The door body 14 is configured such that a ventilation unit 16 is supported on the inside of the frame of the door body frame 20. The door body 14 may also be a sliding door that is supported so as to be slidable relative to the opening frame 12.

[0015] First, the door frame 20 is a frame assembly of an upper frame 20a, a lower frame 20b, a hanging frame 20c, and a door end frame 20d. The door frame 20 has a composite structure combining a metal frame material made of an extruded material such as an aluminum alloy with a resin frame material made of an extruded material such as PVC. The metal frame material has a metal upper frame 21a, a metal lower frame 21b, a metal hanging frame 21c, and a metal door end frame 21d. The resin frame material has a resin upper frame 22a, a resin lower frame 22b, a resin hanging frame 22c, and a resin door end frame 22d.

[0016] The upper frame 20a has a resin upper frame 22a attached to the interior facing surface of the metal upper frame 21a. The lower frame 20b has a resin lower frame 22b attached to the interior facing surface of the metal lower frame 21b. The hanging frame 20c has a resin hanging frame 22c attached to the interior facing surface of the metal hanging frame 21c. The door end frame 20d has a resin door end frame 22d attached to the interior facing surface of the metal door end frame 21d.

[0017] The door body 14 has a hanging frame 20c rotatably connected to the vertical frame 12c via a hinge 24. Reference numeral 25 in Fig. 1 is a door closer, and reference numeral 26 in Fig. 2 is a door handle. This allows the door body 14 to move in the forward direction relative to the opening frame 12, opening and closing the opening within the frame of the opening frame 12.

[0018] Next, the ventilation unit 16 is a ventilation window that allows air to circulate between the inside and outside of the room when the door body 14 is closed. In this embodiment, a casement window is used as the ventilation unit 16. The ventilation unit 16 has a window frame 28, an outer shoji screen 29, an inner shoji screen 30, and a lattice device 31.

[0019] The window frame 28 is made up of an upper frame 28a, a lower frame 28b, and left and right vertical frames 28c, 28d. Each of the frames 28a-28d has a composite structure combining a metal frame material made of an extruded shape material such as an aluminum alloy with a resin frame material made of an extruded shape material such as PVC. The metal frame material has a metal upper frame 33a, a metal lower frame 33b, and metal vertical frames 33c, 33d. The resin frame material has a resin upper frame 34a, a resin lower frame 34b, and resin vertical frames 34c, 34d.

[0020] The upper frame 28a has a resin upper frame 34a attached to the frame inner visible surface of the metal upper frame 33a. The metal upper frame 33a in this embodiment is also part of the metal upper frame 21a of the door frame 20. The lower frame 28b has a resin lower frame 34b attached to the frame inner visible surface and the room-side visible surface of the metal lower frame 33b. The metal lower frame 33b in this embodiment is also part of the metal lower frame 21b of the door frame 20. The vertical frames 28c and 28d have resin vertical frames 34c and 34d attached to the frame inner visible surface and the room-side visible surface of the metal vertical frames 33c and 33d, respectively.

[0021] The inner visible surfaces of the vertical frames 28c, 28d are provided with opening grooves 35a, 35b aligned in the projection direction, respectively. The ventilation unit 16 of this embodiment includes two shoji screens 29, 30 aligned in the indoor / outdoor direction. The side edges of the shoji screens 29, 30 are inserted into the opening grooves 35a, 35b so that they can move up and down. The resin vertical frames 34c, 34d are arranged to cover the interior visible surface of the exterior-side opening groove 35a. Therefore, the vertical frames 28c, 28d each include a resin vertical frame attachment member 36 made of PVC or the like that covers the interior visible surface of the interior-side opening groove 35b. As a result, the interior visible surface of the vertical frames 28c, 28d is essentially formed by the vertical frame attachment member 36.

[0022] The outer shoji 29 and the inner shoji 30 are ventilation shoji screens. The outer shoji 29 has a face material 38 supported on all four sides by a frame 39. The inner shoji 30 has a face material 40 supported on all four sides by a frame 41. The outer shoji 29 is positioned on the upper outside of the window frame 28 when closed. The inner shoji 30 is positioned on the lower inside of the window frame 28 when closed. The face materials 38, 40 are double-glazed glass, for example, with two sheets of glass arranged side by side with a spacer between them. The frame 39, 41 have a composite structure combining a metal frame made of an extruded shape material such as an aluminum alloy with a resin frame made of an extruded shape material such as PVC.

[0023] The lattice device 31 is installed to cover the shoji screens 29, 30 from the outside of the room. The lattice device 31 has a lattice frame 31a fixed to the outside-facing surface of the window frame 28, multiple lattices 31b supported by the lattice frame 31a and aligned vertically, and screen doors 31c installed on the inside of the lattices 31b. The lattices 31b are, for example, horizontal bars. The lattice device 31 may be omitted.

[0024] 2. Explanation of each part of the fittings Next, the specific configuration of each part of the fitting 10 and its function and effect will be described.

[0025] 2.1 First, the specific structure of the outer shoji screen 29 will be explained. As shown in Figures 3 and 4, the outer shoji screen 29 is configured with a frame 39 having upper and lower horizontal frames 39a and 39b, and left and right vertical frames 39c and 39d, supporting a surface material 38. As described above, each frame 39a to 39b is configured with a resin frame material made of PVC or the like attached to the interior facing surface of a metal frame material made of aluminum alloy or the like.

[0026] The upper frame 39a has an opening groove 44 that holds the upper edge of the face material 38. The lower frame 39b has an opening groove 45 that holds the lower edge of the face material 38, and a hollow portion 46 adjacent to the outer side of the opening groove 45. The vertical frames 39c and 39d also have an opening groove 47 similar to the opening grooves 44 and 45 (see also Figures 2 and 13B).

[0027] As shown in FIGS. 3 to 6B, a metal opening groove reinforcing member 48 is disposed in the opening groove 44 of the upper frame 39a. A metal opening groove reinforcing member 49 is disposed in the opening groove 45 of the lower frame 39b. A metal opening groove reinforcing member 50 is also disposed in the opening groove 47 of the left and right vertical frames 39c, 39d. The opening groove reinforcing members 48-50 are formed with a generally U-shaped cross section and extend over substantially the entire length of each frame 39a-39d. The opening groove reinforcing members 48-50 are formed of a metal material having a higher rigidity and melting point than the aluminum alloy constituting the frames 39a-39d, such as stainless steel or steel.

[0028] A metallic hollow portion reinforcing member 51 is disposed in the hollow portion 46 of the lower frame 39b. The hollow portion reinforcing member 51 has a generally U-shaped cross section and extends over substantially the entire length of the lower frame 39b. The material of the hollow portion reinforcing member 51 may be the same as or similar to the material of the opening groove reinforcing members 48-50.

[0029] As shown in Figure 3, a sliding element 54 is attached to the frame outer projection surface 39b1, which is the underside of the lower frame 39b. The sliding element 54 is a guide element that guides the sliding movement of the outer shoji screen 29. The sliding element 54 is also a wire connecting element to which a wire 55 for suspending the outer shoji screen 29 is connected. The sliding elements 54 are provided on the left and right ends of the lower frame 39b, respectively. The left and right sliding elements 54 may have a symmetrical structure.

[0030] 2.2 Next, a fire prevention structure using wire 55 and sliding parts 54 will be described. As shown in Fig. 4, the wire 55 is, for example, a twisted metal wire. Two wires 55 are used, and are provided on the left and right outer sides of the shoji screens 29, 30, respectively. Each wire 55 has a first end 55a connected to the outer shoji screen 29 and a second end 55b connected to the inner shoji screen 30. A terminal member 56 is fixed to the first end 55a, and the first end 55a is connected to the sliding part 54 via the terminal member 56. A metal plate 57 is fixed to the second end 55b, and the second end 55b is connected to the inner shoji screen 30 via the metal plate 57.

[0031] Each wire 55 is wound around a pulley 58 between its ends 55a and 55b, thereby alternately moving the outer shoji 29 and the inner shoji 30 up and down. The pulley 58 is screwed to the inner frame surface of the metal vertical frames 33c and 33d of the vertical frames 28c and 28d.

[0032] 3 and 6A, sliding element 54 has a main body 60 and a connecting fitting 61. Main body 60 is a resin part attached to connecting fitting 61, and serves as a sliding part for vertical frames 39c and 39d.

[0033] As shown in Figures 6A to 7, the connecting fitting 61 has a wire attachment piece 61a, a connecting piece 61b, and an intermediate plate portion 61c. The wire attachment piece 61a is the portion to which the first end portion 55a of the wire 55 is connected. The connecting piece 61b is provided so as to protrude from the side surface of the resin main body portion 60, specifically, from the visible surface facing the bottom frame 39b on the side opposite the vertical frames 28c and 28d, and is the portion to be connected to the bottom frame 39b. The intermediate plate portion 61c is the portion between the wire attachment piece 61a and the connecting piece 61b.

[0034] The connecting fitting 61 has a wire attachment piece 61a and a connecting piece 61b arranged at different levels along the XZ plane, with an intermediate plate portion 61c extending along the XY direction and standing upright in the Y direction between them. As a result, the connecting fitting 61 is composed of a metal plate having a generally crank shape as a whole. The material of the connecting fitting 61 may be the same as or similar to that of the opening groove reinforcing members 48 to 50 and the hollow portion reinforcing member 51 described above.

[0035] The connecting fitting 61 is formed with a locking hole 62a, an insertion hole 62b, and an elongated hole 62c.

[0036] The locking hole 62a is a hole portion for locking the terminal member 56 of the wire 55. The locking hole 62a extends along the longitudinal direction (X direction) of the wire attachment piece 61a. One end of the locking hole 62a communicates with the insertion hole 62b, and the other end communicates with the elongated hole 62c. Here, the terminal member 56 has an L-shaped metal plate 56a that is screwed to the first end 55a of the wire 55, and a screw 56b that is screwed into a screw hole formed in the metal plate 56a. The hole width of the locking hole 62a is larger than the outer diameter of the shank 56b1 of the screw 56b and smaller than the outer diameter of the head 56b2. This allows the locking hole 62a to lock the screw 56b of the terminal member 56 in a locked state (see FIGS. 4 and 9), thereby connecting the wire 55 to the sliding element 54.

[0037] The insertion hole 62b is a hole portion for inserting the terminal member 56 of the wire 55. The insertion hole 62b is formed along the longitudinal direction (Y direction) of the intermediate plate portion 61c, and is therefore provided on a different surface from the locking hole 62a and communicates with the locking hole 62a. The hole width of the insertion hole 62b is larger than the outer diameter of the head 56b2. This allows the head 56b2 of the screw 56b of the terminal member 56 to be smoothly inserted into the insertion hole 62b. The screw 56b with its head 56b2 inserted into the insertion hole 62b can then be moved to the locking hole 62a as shown by the dashed-dotted arrow in FIG. 7, and with the shank 56b1 inserted into the locking hole 62a, the head 56b2 can be locked into the locking hole 62a.

[0038] The elongated hole 62c is a hole portion for adjusting the position of the terminal member 56 engaged in the engagement hole 62a in the projection direction. The elongated hole 62c extends in the width direction (Z direction) of the wire attachment piece 61a, i.e., along the projection direction of the lower frame 39b. The elongated hole 62c communicates with the engagement hole 62a on the side opposite the insertion hole 62b. The hole width of the elongated hole 62c may be approximately the same as the hole width of the engagement hole 62a, and is larger than the outer diameter of the shank 56b1 of the screw 56b and smaller than the outer diameter of the head 56b2. This allows the elongated hole 62c to move the screw 56b, which is retained in the engagement hole 62a, in the projection direction (see FIG. 9). In other words, because the wire 55 is wound around the pulley 58, it hangs down at a position offset to one side from the projection center of the lower frame 39b. The long hole 62c eliminates misalignment of the wire 55 in the projection direction, and enables the wire 55 to hang down as vertically as possible. The long hole 62c may be omitted.

[0039] 7 to 9, the wire attachment piece 61a does not have the locking hole 62a or the elongated hole 62c at the end opposite the intermediate plate portion 61c. That is, the locking hole 62a is closed via the elongated hole 62c on the side opposite the insertion hole 62b. In other words, the locking hole 62a is a closed hole portion that does not open on the side opposite the insertion hole 62b.

[0040] As shown in FIGS. 6A to 8 , the connecting fitting 61 further has a plurality of connecting holes 63 provided in the connecting piece 61b and a plurality of mounting holes 64 provided in the intermediate plate portion 61c. The mounting holes 64 are holes through which screws 65 are inserted to connect the main body portion 60 and the connecting fitting 61. The connecting holes 63 are holes through which screws 66 are inserted to secure the connecting fitting 61 to the lower frame 39b. The screws 66, when inserted into the connecting holes 63, are threaded into the threaded holes 51b of the hollow portion reinforcement member 51 through holes formed in the frame outer visible surface 39b1 of the lower frame 39b. In other words, the connecting fitting 61 is connected to the hollow portion reinforcement member 51. At this time, the heads of the screws 66 are engaged with the connecting pieces 61b of the connecting fitting 61, and no resin parts such as the main body portion 60 are arranged around them.

[0041] In this way, the sliding element 54 of this embodiment may be configured so that the connecting piece 61b of the connecting fitting 61 protruding from the side of the resin main body 60 is directly screwed to the bottom frame 39b and attached to the outer screen 29. As a result, the screw 66 connecting the bottom frame 39b and the connecting piece 61b is surrounded only by metal members and is installed at a distance from the resin main body 60. Therefore, in the event of a fire, the connection state of the connecting fitting 61 to the bottom frame 39b via the screw 66 is maintained for a long time, allowing the outer screen 29 to be suspended and supported by the wire 55 for a long time. As a result, the fitting 10 can prevent the outer screen 29 from falling or descending in the event of a fire, achieving high fire resistance. In this case, the connecting fitting 61 has a high-strength structure formed from a roughly crank-shaped metal plate, allowing for even more stable support of the outer screen 29. In particular, by connecting the connecting fittings 61 to the hollow section reinforcement material 51 of the lower frame 39b, the outer shoji screen 29 can be further prevented from falling or descending.

[0042] Furthermore, the connecting fitting 61 has an insertion hole 62b that continues from the locking hole 62a, allowing for smooth connection of the head 56b2 of the screw 56b of the terminal member 56. Therefore, when installing the outer shoji screen 29 in the window frame 28, the fitting 10 allows for easy connection of the screw 56b, which has already been attached to the terminal member 56, to the sliding part 54. Furthermore, when the screw 56b is locked into the locking hole 62a, it is oriented so that it faces upward from the bottom. Therefore, after the screw 56b is locked into the locking hole 62a, the head 56b2 of the screw 56b can be easily rotated with a tool such as a screwdriver, making it easy to fine-tune the height position of the outer shoji screen 29 and improving the assembly efficiency of the outer shoji screen 29.

[0043] In this case, by providing the insertion hole 62b on a different surface from the locking hole 62a, it is possible to prevent the wire 55 from falling out of the insertion hole 62b when it sways in the X direction during a fire or the like. The surface on which the insertion hole 62b is provided is not limited to the intermediate plate portion 61c standing in the Y direction, but may also be, for example, the connecting piece 61b. The connecting fitting 61 may have a shape other than a crank shape, and in this case too, it is preferable that the insertion hole 62b be provided on a different surface from the locking hole 62a.

[0044] 2.3 Next, a fire prevention structure using the crescent support 70 will be described. As shown in Figures 3 to 5, 10A and 10B, a crescent receiver 70 is attached to the bottom frame 39b of the outer shoji screen 29. The crescent receiver 70 is a metal part that engages with a crescent 71 attached to the outer frame surface of the top frame 41a (see Figure 1) of the frame body 41 of the inner shoji screen 30. The crescent receiver 70 is attached to approximately the center in the longitudinal direction of the bottom frame 39b, which serves as the joining frame of the outer shoji screen 29. The crescent receiver 70 is made by bending, cutting out, cutting and raising a metal plate such as stainless steel or steel. The crescent receiver 70 and crescent 71 are made of a metal such as stainless steel.

[0045] As shown in FIGS. 5, 10A, and 10B, the crescent receiver 70 has an attachment portion 70a and an engagement portion 70b.

[0046] The mounting portion 70a is a substantially rectangular metal plate and is disposed along the XY plane. A pair of left and right screw holes 70c are formed in the mounting portion 70a. Screws 72 for fixing the crescent holder 70 to the lower frame 39b are threaded into the screw holes 70c. The mounting portion 70a is fixed to one of the pair of wall portions that form the opening groove 45, a room-side wall portion 74.

[0047] The engaging portion 70b protrudes upward from the mounting portion 70a while bending slightly toward the outside of the room, and then bends twice toward the inside of the room, forming a downward hook shape. When the crescent 71 is engaged with the engaging portion 70b, the engaging portion 70b is in an engaged state in which the crescent 71 is suspended and supported as if it were gripping the crescent 71 from above.

[0048] The lower frame 39b has a hole 74a in its indoor wall portion 74 to which the crescent support 70 is attached. The hole 74a is a through-hole that can receive the screw 72, known as a clearance hole. The opening groove reinforcement 49 arranged in the opening groove 45 of the lower frame 39b has a cut-out piece 49a in approximately the center of its longitudinal direction. The cut-out piece 49a is a plate piece formed by cutting out a portion of the bottom plate that forms the visible surface of the opening groove reinforcement 49 and bending it toward the outside of the frame. The opening groove reinforcement 49 has a restriction hole 49c in its indoor protruding piece 49b that faces the indoor wall portion 74. The restriction hole 49c is formed in a portion of the indoor protruding piece 49b that includes the cut-out piece 49a.

[0049] The mounting portion 70a of the crescent receiver 70 is sandwiched between the indoor side wall portion 74 of the lower frame 39b and the indoor side protruding piece 49b of the opening groove reinforcement member 49, and is fastened to the indoor side wall portion 74 by a screw 72. Specifically, the screw 72 is inserted from the indoor side toward the outdoor side through the hole portion 74a and threaded into the screw hole 70c, and the tip portion that has passed through the screw hole 70c is inserted into the restriction hole 49c.

[0050] In this way, the screw 72 may be configured so that its tip is inserted into the restriction hole 49c and locked in the XY directions when the crescent receiver 70 is fastened to the lower frame 39b. In this way, the screw 72 functions as a restriction member that restricts relative movement in the up and down direction between the crescent receiver 70 and the opening groove reinforcing member 49.

[0051] For example, if the fitting 10 is affected by a fire from outside, the outer screen 29, located above the window frame 28 and on the outside, is likely to become hotter than the inner screen 30, potentially softening the frame 39. In the fitting 10 of this embodiment, even if the frame 39 of the outer screen 29 softens, the crescent 71 fastened to the inner screen 30, which is less susceptible to heat than the outer screen 29, restricts downward movement of the crescent support 70. The screw 72 restricts the relative vertical movement of the opening groove reinforcement 49, which holds the lower edge of the face plate 38, and the crescent support 70. In other words, because the opening groove reinforcement 49 is suspended and supported by the crescent 71 via the screw 72, the face plate 38 and the outer screen 29 themselves can be prevented from falling or descending. The restricting member restricting the relative movement of the crescent support 70 and the opening groove reinforcement 49 can be any member other than a screw, as long as it is a metal member or the like with a predetermined strength. The restriction hole 49c may also be a notched hole with a closed top.

[0052] As described above, the restriction hole 49c is formed in a portion of the indoor-side protruding piece 49b that includes the cut-and-raised piece 49a. Therefore, as shown in Fig. 3, even if a screw 72 of sufficient length is used so that it can be stably engaged in the restriction hole 49c, the tip of the screw 72 that has passed through the restriction hole 49c can be prevented from interfering with the face material 38 or the gasket that holds the lower edge of the face material 38.

[0053] Furthermore, it is preferable that the fitting 10 also has a fire prevention structure using the crescent support 70 in addition to the fire prevention structure using the connecting fittings 61 with the wires 55 to suspend the bottom frame 39b. In this way, the wires 55 can support both the left and right ends of the bottom frame 39b, and the crescent support 70 can support the center of the bottom frame 39b, so that the bottom frame 39b is supported at three points in a balanced manner. As a result, the fitting 10 can further prevent the face material 38 and outer screen 29 from falling or descending.

[0054] The tip of the screw 72 is simply inserted into the restriction hole 49c of the opening groove reinforcement member 49. Therefore, if the lower frame 39b is deformed in the event of a fire and the opening groove reinforcement member 49 moves to the outside of the room, there is a concern that the screw 72 may fall out of the restriction hole 49c.

[0055] 10A and 10B, two additional screws 76 are provided so as to straddle the two screws 72. Holes 74b, through which the screws 76 are inserted, are formed in the indoor-side wall 74 of the bottom frame 39b, and threaded holes 49d, through which the screws 76 are threaded, are formed in the opening groove reinforcement member 49. The screws 76 are threaded into the threaded holes 49d while passing through the holes 74b. This fastens the bottom frame 39b and the opening groove reinforcement member 49, restricting movement of the opening groove reinforcement member 49 toward the outdoor side, thereby reliably preventing the screws 72 from falling out of the restriction holes 49c. For example, if the screws 72 can be inserted sufficiently deeply into the restriction holes 49c, the screws 76, holes 74b, and threaded holes 74d may be omitted, as shown in FIG. 11.

[0056] The connecting structure between the crescent receiver 70 and the opening groove reinforcement member 49 may be other than the exemplary configurations shown in Figures 10A to 11. For example, the connecting structure shown in Figures 12A and 12B is configured such that the crescent receiver 70 and the opening groove reinforcement member 49 are fastened together using a back plate 78. The back plate 78 has a screw hole 78a that is coaxial with the restriction hole 49c of the opening groove reinforcement member 49. Note that the crescent receiver 70 has an insertion hole 70d, which is a so-called clearance hole, instead of the screw hole 70c.

[0057] 12A and 12B, the screw 72 is inserted from the inside to the outside of the room through the hole 74a, the insertion hole 70d, and the restriction hole 49c, and then threaded into the screw hole 78a of the back plate 78. As a result, even in this configuration, the tip of the screw 72 is locked in the restriction hole 49c when the crescent holder 70 is fastened to the lower frame 39b, so that the falling or sagging of the face material 38 and the outer shoji screen 29 can be prevented.

[0058] 2.4 Next, a fire prevention structure in which a fire prevention structure using the connecting metal fitting 61 and a fire prevention structure using the crescent receiver 70 are linked together will be described. As described above, the outer shoji screen 29, which is prone to become hot during a fire, has high fire resistance because the connecting fitting 61 is supported by the pulley 58 and the inner shoji screen 30 via the wire 55, and the crescent receiver 70 is supported by the inner shoji screen 30 via the crescent 71. The fitting 10 of this embodiment may further be provided with a structure that links these two fire resistance structures together to further improve fire resistance.

[0059] As shown in Figures 3 to 6B, in the outer shoji screen 29, the opening groove reinforcement member 49, which is connected to the crescent receiver 70, is connected to the hollow portion reinforcement member 51. The opening groove reinforcement member 49 has a pair of holes 49e at a position straddling the crescent receiver 70 in the X direction. The hollow portion reinforcement member 51 has screw holes 51a at positions overlapping each hole 49e in the vertical direction. The screw holes 51a are formed in the upper plate portion of the hollow portion reinforcement member 51.

[0060] Therefore, the outer shoji screen 29 is connected to the opening groove reinforcement 49 and the hollow portion reinforcement 51 by inserting the screw 80 from above the opening groove reinforcement 49 into the hole 49e and screwing it into the screw hole 51a. In addition, a through hole is formed coaxially with the hole 49e and the screw hole 51a in the wall portion separating the opening groove 45 and the hollow portion 46 of the lower frame 39b, and the screw 80 is screwed into the screw hole 51a through the hole 49e and this through hole.

[0061] As described above, the hollow section reinforcement member 51, which is connected to the crescent receiver 70 via the opening groove reinforcement member 49, is also connected to the connecting fittings 61 of the sliding element 54. The hollow section reinforcement member 51 has screw holes 51b at positions that overlap in the vertical direction with the connecting holes 63 formed in the connecting pieces 61b of the connecting fittings 61. The screw holes 51b are formed in the lower plate portion of the hollow section reinforcement member 51.

[0062] Therefore, the outer shoji screen 29 is connected between the opening groove reinforcement 49 and the connecting fitting 61 by inserting the screw 66 from below the connecting piece 61b through the connecting hole 63 and threading it into the screw hole 51b. In addition, a through hole is formed coaxially with the screw hole 51b and the connecting hole 63 in the wall portion that forms the frame outer visible surface 39b1, which is the underside of the lower frame 39b, and the screw 66 is installed through this through hole.

[0063] In this way, the outer shoji screen 29 is connected from the crescent support 70 to the connecting fitting 61 using metal opening groove reinforcement 49, hollow section reinforcement 51, and metal screws 72, 80, and 66. As a result, the outer shoji screen 29 is connected entirely by metal members between the wire 55 and connecting fitting 61 that suspend and support both the left and right ends of the bottom frame 39b, and the crescent 71 and crescent support 70 that suspend and support the center of the bottom frame 39b. As a result, the building material 10 has even higher fire resistance and can further prevent the surface material 38 and outer shoji screen 29 from falling or descending.

[0064] 2.5 Next, we will explain the fire prevention structure achieved by connecting the opening groove reinforcement member 49 of the lower frame 39b of the outer shoji screen 29 with the opening groove reinforcement members 48, 50 of the other frames 39a, 39c, 39d. As described above, the outer screen 29, which is prone to becoming hot during a fire, may be provided with a structure that can improve fire resistance by appropriately connecting the opening groove reinforcement members 48 to 50 of each frame 39a to 39d together, in addition to or instead of the fire resistance structure using the connecting fittings 61 and crescent support 70 described above.

[0065] First, as shown in Figures 3 to 6B, the hollow portion reinforcement member 51 of the lower frame 39b is connected to the opening groove reinforcement members 50 of the vertical frames 39c and 39d, respectively. Note that Figures 4 to 6B illustrate the connection structure between the opening groove reinforcement member 50 of one vertical frame 39c and the hollow portion reinforcement member 51, but the connection structure between the opening groove reinforcement member 50 of the other vertical frame 39d and the hollow portion reinforcement member 51 may be a symmetrical structure.

[0066] The opening groove reinforcement 50 of the vertical frames 39c, 39d is a metal plate with a U-shaped cross section for the majority of its length, but has a roughly L-shaped bent piece 50a at its lower end. The bent piece 50a is a plate piece that has a portion of the plate part that forms the visible surface of the opening groove reinforcement 50 protruding downward and bent toward the inside of the frame. Screw holes 50b are formed in the plate part of the bent piece 50a that runs along the XZ plane. The hollow portion reinforcement 51 has hole portions 51c at its left and right ends that overlap the screw holes 50b in the vertical direction. The hole portions 51c are formed in the plate part on the upper side of the hollow portion reinforcement 51.

[0067] Here, the frame body 39 of this embodiment employs a vertical recess structure in which both left and right ends of the lower frame 39b are recessed into the opening grooves 47 of the vertical frames 39c and 39d. Therefore, when the hollow section reinforcement 51 is butted against the inner frame surface of the opening groove reinforcement 50, the bent piece 50a is inserted into the opening groove 45 from the small end and overlaps with the upper surface, which is the inner frame surface of the hollow section reinforcement 51. Note that a wall is interposed between the bent piece 50a and the hollow section reinforcement 51, separating the opening groove 45 of the lower frame 39b from the hollow section 46. In other words, the bent piece 50a is inserted into the opening groove 45 from the small end.

[0068] Therefore, the outer shoji screen 29 is connected between the hollow section reinforcement 51 and the opening groove reinforcement 50 by inserting the screw 82 from below through the hole 51c and threading it into the screw hole 50b. As a result, the opening groove reinforcement 50 of the vertical stiles 39c and 39d is also connected to the opening groove reinforcement 49 of the bottom stile 39b via the hollow section reinforcement 51. In other words, the opening groove reinforcement 49 of the bottom stile 39b and the opening groove reinforcement 50 of the vertical stiles 39c and 39d are connected relative to each other. Of course, the opening groove reinforcement 49, 50 may also be directly connected to each other. In addition, a through hole is formed in the wall separating the opening groove 45 of the bottom stile 39b from the hollow section 46, coaxially with the hole 51c and the screw hole 50b, and the screw 82 is installed through this through hole.

[0069] Next, as shown in Figures 3, 13A and 13B, the opening groove reinforcement member 48 of the upper frame 39a is connected to the opening groove reinforcement members 50 of the vertical frames 39c and 39d, respectively. Note that Figures 13A and 13B illustrate the connection structure between the opening groove reinforcement member 50 of one vertical frame 39c and the opening groove reinforcement member 48, but the connection structure between the opening groove reinforcement member 50 of the other vertical frame 39d and the opening groove reinforcement member 48 may be a symmetrical structure.

[0070] The opening groove reinforcement 48 of the upper frame 39a is a metal plate with a U-shaped cross section for most of its length, but has approximately L-shaped bent pieces 48a at both left and right ends. The bent pieces 48a are plate pieces that extend part of the plate portion along the visible surface of the opening groove reinforcement 48 and are bent upward in the XY directions. A screw hole 48b is formed in the plate portion on the XY plane of the bent piece 48a.

[0071] The opening groove reinforcement material 50 of the vertical stiles 39c, 39d has a protruding piece 50c at a part of the upper end of the plate portion along the projection surface. The protruding piece 50c is a part that protrudes upward from a part of the projection surface of the opening groove reinforcement material 50. A hole 50d is formed in the protruding piece 50c.

[0072] Here, the frame body 39 of this embodiment employs a vertical recess structure in which both left and right ends of the upper frame 39a are recessed into the opening grooves 47 of the vertical frames 39c and 39d. Therefore, when the opening groove reinforcement 48 is butted against the inner frame projection surface of the opening groove reinforcement 50, the bent piece 48a faces the projection surface of the protruding piece 50c, and the screw hole 48b and the hole 50d are coaxially arranged. Therefore, the outer shoji screen 29 is connected to the opening groove reinforcement 48 and the opening groove reinforcement 50 by inserting the screw 84 from the outside of the frame toward the inside of the frame through the hole 50d and threading it into the screw hole 48b. As a result, the opening groove reinforcement 50 of the vertical frames 39c and 39d is also connected to the opening groove reinforcement 48 of the upper frame 39a.

[0073] When connecting the upper frame 39a and the vertical frames 39c, 39d, for example, after connecting the opening groove reinforcement members 48, 50 with the screws 84 as described above, the upper frame 39a is placed over the opening groove reinforcement member 48 from the outside, and the vertical frames 39c, 39d are placed over the opening groove reinforcement member 50 from the outside. Then, the upper frame 39a and the vertical frames 39c, 39d are fastened together with the screws 86 (see also FIG. 3). This connects the upper frame 39a and the vertical frames 39c, 39d with the opening groove reinforcement members 48, 50 connected to each other. In FIG. 13A, reference numeral 87 denotes a screw fastening the opening groove reinforcement member 48 to the upper frame 39a, and reference numeral 88 denotes a screw fastening the opening groove reinforcement member 50 to the vertical frame 39c (39d).

[0074] In this way, the outer shoji screen 29 has the opening groove reinforcements 49, 50 of the lower frame 39b and the left and right vertical frames 39c, 39d connected via the hollow reinforcement 51, and the opening groove reinforcements 48, 50 of the upper frame 39a and the left and right vertical frames 39c, 39d connected together. This allows the opening groove reinforcements 48-50 of the four perimeter frames 39a-39d to be integrally connected, and the opening groove reinforcements 48-50 essentially form a highly rigid frame. As a result, the opening groove reinforcements 48-50 of the four perimeter frames 39a-39d can firmly hold the face material 38. Furthermore, the opening groove reinforcement 49 of the lower frame 39b, which is connected to the connecting fittings 61 and the crescent support 70, can be supported by the other opening groove reinforcements 48, 50. As a result, the fitting 10 has even higher fire resistance and can further prevent the surface material 38 and the outer shoji screen 29 from falling or descending.

[0075] In particular, the outer shoji screen 29 is a component of the ventilation unit 16, and is supported by the door frame 20, which is more susceptible to softening than the opening frame 12 fixed to the building frame, so there is an even greater concern that it may fall off. Therefore, by connecting the opening groove reinforcement member 49 of the lower frame 39b, which is suspended by wire 55, to the opening groove reinforcement members 48, 50 of the other frames 39a, 39c, 39d, the effectiveness of preventing the face material 38 and the outer shoji screen 29 from falling off is further improved.

[0076] 2.6 Next, other fire prevention structures provided in the building material 10 will be described. The fitting 10 of this embodiment may be provided with other fire prevention structures in addition to or instead of the above-mentioned fire prevention structures.

[0077] First, as shown in Figure 14, when the inner shoji screen 30 is closed, the lower part of the lower frame 41b of the frame body 41 is inserted into and held in a groove 90 in the lower frame 28b of the window frame 28. That is, the lower frame 41b has an exterior protruding piece 92a hanging from the exterior end of the frame's exterior visible surface and an interior protruding piece 92b hanging from the interior end. The groove 90 has an exterior wall portion 90a facing the exterior of the exterior protruding piece 92a and an interior wall portion 90b facing the interior of the interior protruding piece 92b. Reference numeral 94 in Figure 14 denotes a weatherstripping material. As a result, in the event of a fire, the protruding pieces 92a and 92b of the inner shoji screen 30 are held by the walls 90a and 90b, preventing them from falling off or moving inside or outside the room.

[0078] However, the metal bottom frame 33b of the bottom frame 28b and the metal bottom stile 21b of the door frame 20 formed integrally therewith are made of aluminum alloy, and therefore may soften in the event of a fire. If the metal bottom frame 33b and metal bottom stile 21b bear the weight of the inner shoji screen 30 in a softened state, they may deform, raising the risk of the inner shoji screen 30 falling off or dropping down from the window frame 28.

[0079] Therefore, the fitting 10 of this embodiment may be configured with a retaining bracket 96 attached to the interior side of the exterior wall portion 90a of the metal sill 33b. The retaining bracket 96 is made of a metal plate, such as stainless steel or steel, bent into a roughly crank shape. The retaining bracket 96 has a screw hole and is fastened to the exterior wall portion 90a using a screw 98 that passes through the exterior wall portion 90a. The retaining bracket 96 is installed so that the upwardly bent, roughly L-shaped retaining piece 96a receives the exterior protruding piece 92a of the inner shoji screen 30. As a result, the exterior protruding piece 92a of the inner shoji screen 30 is held by the retaining bracket 96, preventing it from falling or descending even if the metal sill 33b softens during a fire.

[0080] Next, as shown in Figures 14 to 16, the metal bottom frame 21b of the door frame 20 has a hollow portion 102 adjacent to the groove portion 90 with a partition wall 100 sandwiched therebetween. A reinforcing member 104 made of a metal such as stainless steel or steel is arranged in the hollow portion 102. Note that the partition wall 100 is not shown in Figure 15.

[0081] The reinforcing member 104 may be configured to include a vertical plate 104a extending along the inner surface of the exterior wall portion 21b1, which forms the exterior facing surface of the metal stile 21b; an upper plate 104b extending from the upper portion of the vertical plate 104a toward the interior of the room; and a lower plate 104c extending from the lower portion of the vertical plate 104a toward the interior of the room. The vertical plate 104a and the upper plate 104b extend substantially the entire length of the metal stile 21b. The lower plate 104c is positioned to overlap the left and right drain openings 21b2 formed at the bottom of the exterior wall portion 21b1. Note that the exterior wall portion 21b1 is not shown in FIG. 16.

[0082] The vertical plates 104a and upper plate 104b of the reinforcing member 104 are arranged to encompass screw holes 108 formed on the underside of the partition wall 100 of the metal bottom frame 21b (see Figure 14). Upright pieces 104d that stand up on the interior side of the screw holes 108 are provided at positions slightly offset from both left and right ends of the upper plate 104b toward the center. The screw holes 108 are where screws that fasten the metal bottom frame 21b to the metal hanging frame 21c and metal door end frame 21d are screwed in.

[0083] The drain outlet 21b2 drains rainwater and other water that has flowed into the hollow portion 102. A drain valve 106 is attached to the drain outlet 21b2. A pair of left and right drain holes 100a are formed in the partition wall 100. The upper plate 104b of the reinforcing member 104 is provided with cutout holes 104e at positions offset in the X direction from the left and right drain holes 100a (see Figure 15). Therefore, in the fitting 10, rainwater and other water that flows over the surfaces of the shoji screens 29, 30 and is received in the groove portion 90 flows into the hollow portion 102 through the drain holes 100a, passes through the cutout holes 104e, and then passes through the side of the lower plate 104c to be smoothly drained into the drain outlet 21b2.

[0084] In this way, the door frame 20 has the reinforcing member 104 surrounding the screw holes 108 into which screws are fastened that fasten the metal bottom frame 21b, which supports the weight of the ventilation unit 16, to the left and right metal hanging frames 21c and the metal door end frame 21d. Therefore, even if flames enter the hollow portion 102 through the drain outlet 21b2 during a fire, for example, the reinforcing member 104 provides heat insulation and protection for the screw holes 108. As a result, the door frame 10 can prevent the metal bottom frame 21b from separating from the left and right metal hanging frames 21c and the metal door end frame 21d during a fire. Furthermore, because the vertical plate 104a of the reinforcing member 104 extends over substantially the entire height of the hollow portion 102 in the vertical direction, the collapse of the metal bottom frame 21b itself can also be prevented.

[0085] 14 to 16, the reinforcing material 104 and its surrounding area may be provided with thermal expansion members 110, 111, 112, 113, 114, and 115. The thermal expansion members 110 to 115 are, for example, heat-expanding materials such as graphite that foam and expand when heated.

[0086] The thermal expansion member 110 is adhesively fixed to the upper surface of the upper plate 104b of the reinforcing material 104 in a position overlapping the drain hole 100a. The thermal expansion member 111 is adhesively fixed to the upper surface of the partition wall 100 near the drain hole 100a. The thermal expansion member 112 is provided at the outdoor end of the upper surface of the upper plate 104b of the reinforcing material 104 and is aligned in the forward direction with the thermal expansion member 110. The thermal expansion member 113 is adhesively fixed to both ends in the X direction on the indoor surface of the vertical plate 104a of the reinforcing material 104 and extends in the Y direction. The thermal expansion member 114 is adhesively fixed to the lower surface of the lower plate 104c of the reinforcing material 104 in a position overlapping the drain opening 21b2. The thermal expansion member 115 is adhesively fixed to the frame outer front surface of the metal bottom frame 21b and extends over approximately the entire length of the metal bottom frame 21b.

[0087] In this way, the metal bottom frame 21b of the door frame 20 has a thermal expansion member 114 attached to the lower plate 104c directly above the drain outlet 21b2 that communicates with the outside, and a thermal expansion member 110 attached to the upper plate 104b directly below the drain hole 102a that communicates from the hollow portion 102 to the groove portion 90. As a result, the building material 10 can prevent the formation of a through hole for flames and smoke that continues from the drain outlet 21b2 through the hollow portion 102 to the groove portion 90 in the event of a fire.

[0088] The fitting 10 may be provided with thermal expansion members in various locations other than these thermal expansion members 110 to 115. Therefore, thermal expansion members other than the thermal expansion members 110 to 115 are indicated with reference numeral 116 in Figures 1 to 3 and 14. Note that reference numeral 118 in Figures 14 to 16 denotes a screw that fastens the upper plate 104b to the partition wall 100 (metal lower frame 21b).

[0089] 3. Description of one aspect of fittings A fitting according to one aspect of the present invention comprises a window frame, a first shoji screen slidably supported on the window frame and positioned on the indoor side of the window frame when closed, a second shoji screen slidably supported on the window frame and positioned on the outdoor side of the window frame when closed, a metal crescent attached to the first shoji screen, and a metal crescent holder attached to the joint frame of the second shoji screen and engaging with the crescent, wherein the joint frame of the second shoji screen has an opening groove that holds the edge of a face material, a metal opening groove reinforcement member that is positioned in the opening groove and extends along the longitudinal direction of the joint frame, and a restricting member that restricts relative movement between the crescent holder and the opening groove reinforcement member in the sliding direction of the second shoji screen. With this configuration, the restricting member restricts relative movement between the crescent holder and the opening groove reinforcement member, so that the opening groove reinforcement member can be supported via the crescent holder in the event of a fire. This improves the building materials' fire resistance by preventing the second shoji screen and its surface material, which are susceptible to heat during a fire, from moving or shifting, and by preventing gaps from forming between the second shoji screen and the window frame.

[0090] The restricting member may be a screw that fixes the crescent holder to the stile. In this case, the screw that fixes the crescent holder to the stile can also be used as the restricting member, thereby reducing the number of parts and costs.

[0091] The fitting may be configured such that the joint frame is formed on the interior wall of the opening groove and has a hole through which the screw can be inserted, the crescent holder has a threaded hole into which the screw is threaded, and the opening groove reinforcement member has a restriction hole through which the screw can be inserted, and the screw is threaded into the threaded hole while being inserted into the hole, and the tip of the screw that has passed through the threaded hole is inserted into the restriction hole and locked. In this way, the fitting can restrict the relative movement between the crescent holder and the opening groove reinforcement member with a simple configuration.

[0092] The indoor wall of the joining frame may further have a second hole provided at a position different from the hole, and the opening groove reinforcement member may further have a second screw hole into which a second screw different from the screw is screwed, and the second screw may be screwed into the second screw hole while being inserted through the second hole portion. In this way, the building material can prevent the opening groove reinforcement member from moving to the outside in the event of a fire and can prevent the screw from falling out of the restriction hole.

[0093] The joint frame may be formed on the interior wall of the opening groove and have a hole through which the screw can be inserted, the crescent holder has an insertion hole through which the screw can be inserted, the opening groove reinforcement member has a restriction hole through which the screw can be inserted, and further include a back plate provided with a screw hole through which the screw can be screwed, and the screw may be screwed into the screw hole while being inserted through the hole, the insertion hole, and the restriction hole in that order. In this way, the building fixture can restrict relative movement between the crescent holder and the opening groove reinforcement member with a simple configuration.

[0094] The first shoji screen may be an inner shoji screen that is positioned inside the lower part of the window frame when closed, the second shoji screen may be an outer shoji screen that is positioned outside the upper part of the window frame when closed, and the stile may be the bottom frame of the outer shoji screen. In this way, the building fixture can prevent the outer shoji screen, which is particularly susceptible to the effects of heat in the event of a fire, from falling off or descending.

[0095] The window may further include a door body, and the window frame may be configured to form a ventilation unit attached to the door body. In this case, the ventilation unit is supported not by the opening frame fixed to the building frame, but by the door frame stile of the door body supported by the opening frame. This makes the second shoji screen located on the outside of the room more likely to fall off in the event of a fire, but this can be effectively prevented by the fire prevention structure using the restricting member.

[0096] It should be noted that the present invention is not limited to the above-described embodiment, and can be freely modified without departing from the spirit of the present invention.

[0097] In the above, a casement window was exemplified as the type of window for the ventilation unit 16, but a sliding window, etc. may also be used. In this case, the outer shoji screen 29 and the inner shoji screen 30 may be arranged side by side, for example, so that they can be slid. [Explanation of symbols]

[0098] 10 fittings, 12 opening frame, 14 door body, 16 ventilation unit, 20 door body frame, 20a, 39a, 41a upper frame, 20b, 39b, 41b lower frame, 28 window frame, 29 outer shoji, 30 inner shoji, 39c, 39d vertical frame, 48-50 opening groove reinforcement material, 51 hollow portion reinforcement material, 54 sliding parts, 55 wire, 56 terminal member, 60 main body portion, 61 connecting fitting, 61a wire mounting piece, 61b connecting piece, 61c intermediate plate portion, 70 crescent holder, 71 crescent

Claims

1. It is a fixture, Window frames and a first shoji screen that is slidably supported by the window frame and that is positioned on the indoor side of the window frame when closed; A second shoji screen that is slidably supported on the window frame and is disposed on the exterior side of the window frame when closed; a metal crescent attached to the first shoji screen; A metal crescent receiver attached to the joining frame of the second shoji screen and into which the crescent is engaged; Equipped with The joining frame of the second shoji screen is an open groove for holding an edge of the face material; a metal groove reinforcement member disposed in the groove and extending along the longitudinal direction of the groove; A restricting member that restricts relative movement between the crescent receiver and the opening groove reinforcing member in the sliding direction of the second shoji screen; have A fixture characterized by:

2. The fitting according to claim 1, The restricting member is a screw that fixes the crescent receiver to the fitting frame. A fixture characterized by:

3. The fitting according to claim 2, The stile is formed on the indoor side wall of the opening groove and has a hole through which the screw can be inserted, the crescent receiver has a screw hole into which the screw is screwed, the opening groove reinforcing member has a restriction hole into which the screw can be inserted, The screw is inserted into the hole and threaded into the screw hole, and the tip portion that has passed through the screw hole is inserted into the restriction hole and locked. A fixture characterized by:

4. The fitting according to claim 3, The indoor side wall portion of the joint frame further has a second hole portion provided at a position different from the hole portion, the opening groove reinforcing member further has a second screw hole into which a second screw different from the screw is screwed; The second screw is threaded into the second screw hole while being inserted through the second hole portion. A fixture characterized by:

5. The fitting according to claim 2, The stile is formed on the indoor side wall of the opening groove and has a hole through which the screw can be inserted, the crescent receiver has an insertion hole through which the screw can be inserted, the opening groove reinforcing member has a restriction hole through which the screw can be inserted, Further, a back plate is provided with a screw hole into which the screw is screwed, The screw is threaded into the screw hole while being inserted through the hole, the insertion hole, and the restriction hole in that order. A fixture characterized by:

6. The fitting according to any one of claims 1 to 5, The first shoji screen is an inner shoji screen that is arranged inside the lower part of the window frame when closed, The second shoji screen is an outer shoji screen that is disposed on the upper outside of the window frame when closed, The cross frame is the bottom frame of the outer door. A fixture characterized by:

7. The fitting according to claim 6, It also has a door body, The window frame constitutes a ventilation unit attached to the door body. A fixture characterized by:

Images