JP7744866B2 - Building materials - Google Patents

Description

The present invention relates to fittings for double-hung windows.

Patent Document 1 discloses a structure for a double-hung window fixture with an outer and inner shoji screen, in which the end of a wire is connected to a mounting bracket attached to the outer shoji screen.

Patent No. 4412555

In the configuration described in Patent Document 1, the terminal member attached to the end of the wire is fixed to the mounting bracket with a horizontal screw. As a result, with this configuration, it is not possible to fine-tune the vertical position of the outer screen by turning the screw after the wire is fixed to the mounting bracket, reducing the efficiency of assembling the screen. Therefore, a configuration could be considered in which the terminal member of the wire is hooked onto the mounting bracket, allowing for fine adjustment of the vertical position of the outer screen. However, in this case, there is a concern that if the frame of the outer screen deforms during a fire, the terminal member of the wire could fall off the mounting bracket, causing the outer screen to fall.

The present invention was made in consideration of the problems with the prior art described above, and aims to provide a fixture that can improve the assembly efficiency and fire resistance of shoji screens.

One aspect of the present invention relates to a fixture comprising a window frame having left and right vertical frames; an outer shoji screen that is supported by the window frame and has left and right sliding parts attached that are guided along the left and right vertical frames and that is positioned on the upper outside of the window frame when closed; an inner shoji screen that is supported by the window frame and is positioned on the lower inside of the window frame when closed; and a wire that has a first end connected to the outer shoji screen and a second end connected to the inner shoji screen, and is wound around a pulley between the first end and the second end, thereby moving the outer shoji screen and the inner shoji screen alternately up and down. The first end of the wire is provided with a screw having a shaft and a head provided at the tip of the shaft and having a larger diameter than the shaft, and is connected to the sliding component; the sliding component has a connecting fitting provided with a wire attachment piece to which the screw is connected; the connecting fitting has a locking hole provided in the wire attachment piece, the locking hole having a hole width larger than the outer diameter of the shaft and smaller than the outer diameter of the head; and an insertion hole communicating with the locking hole, provided on a different surface from the locking hole, and having a hole width larger than the outer diameter of the head.

The above aspects of the present invention can improve the assembly efficiency and fire resistance of shoji screens.

FIG. 2 is a vertical cross-sectional view of a fitting according to one embodiment. FIG. 2 is a cross-sectional view of the fixture shown in FIG. 1 . This is a vertical cross-sectional view of an outer screen. This is an enlarged front view of a portion of the outer shoji screen. This is an enlarged oblique view of the crescent holder attached to the outer shoji screen and its surrounding area. This is an enlarged oblique view of the sliding parts of the outer screen and their surrounding area. FIG. 6B is a perspective view of the sliding element shown in FIG. 6A with the main body portion omitted. FIG. 10A and 10B are side cross-sectional views showing the operation of connecting a terminal member to a connecting fitting. 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. This is an enlarged plan view of the central part of the lower frame. FIG. 10B is a side cross-sectional view of the lower stile shown in FIG. 10A. A plan view showing an enlarged central portion of the lower frame of the first modified example. A plan view showing an enlarged central portion of the lower frame of the second modified example. FIG. 12B is a side cross-sectional view of the lower stile shown in FIG. 12A. This is an exploded perspective view showing the connecting structure between the upper frame and the vertical frame. 13B is a perspective view showing the state in which the opening groove reinforcement members shown in FIG. 13A are connected to each other and the upper stile and vertical stile are further connected. This is an enlarged vertical cross-sectional view of the lower frame of the door frame and its surrounding area. This is a plan view of the bottom frame of the door frame. This is a front view of the bottom frame of the door frame.

Below, we will present a preferred embodiment of the building fixtures according to the present invention and explain them in detail with reference to the accompanying drawings.

1. Description of Overall Configuration of Fitting First, the overall configuration of the fitting 10 according to one embodiment will be described.

As shown in Figures 1 and 2, the fitting 10 of this embodiment comprises an opening frame 12 fixed to an opening in a building frame, a door body 14 supported by the opening frame 12 so that it can be opened and closed, and a ventilation unit 16 attached to the door body 14. The fitting 10 can be used, for example, as a back door.

In this application, the "visible direction" refers to the depth direction of the fixture 10 (the direction indicated by arrow Z in the figure), and the "visible surface" refers to a surface extending along the visible direction. The "visible direction" refers to a direction perpendicular to the visible direction. In the case of vertically elongated vertical frames 28c and vertical stiles 39c, etc., this 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, etc., this refers to the up-down direction perpendicular to their longitudinal direction (the direction indicated by arrow Y in the figure). The "visible surface" refers to a surface along the visible direction. The "inside of the frame" refers to the inner portion of a frame-shaped member such as the window frame 28. The "outside of the frame" refers to the outer portion of a frame-shaped member such as the window frame 28, for example, the outer periphery of the window frame 28 supported by the door frame stile 20. The "inside of the frame" refers to the direction from the outside of the frame of the frame-shaped member toward the inside of the frame. The "outside of the frame" refers to the direction from the inside of the frame of the frame-shaped member toward the outside of the frame.

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 other material. A resin attachment member 18 made of polyvinyl chloride resin (PVC) or other material is attached to the interior side of the frame's inner visible surface.

As shown in Figures 1 and 2, the door body 14 is a single-wing door supported by the opening frame 12 and can be opened and closed in the front direction. The door body 14 is configured so that a ventilation unit 16 is supported on the inside of the door 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.

First, the door frame 20 is a frame assembly consisting 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 that combines 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.

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.

The door body 14 has a hanging frame 20c pivotally connected to the vertical frame 12c via a hinge 24. Reference numeral 25 in Figure 1 is a door closer, and reference numeral 26 in Figure 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.

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.

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 frame 28a-28d has a composite structure combining a metal frame material made of extruded aluminum alloy or other materials with a resin frame material made of extruded PVC or other materials. 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.

The upper frame 28a has a resin upper frame 34a attached to the inner frame surface of the metal upper frame 33a. In this embodiment, the metal upper frame 33a 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 inner frame surface and the interior facing surface of the metal lower frame 33b. In this embodiment, the metal lower frame 33b 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 inner frame surface and the interior facing surface of the metal vertical frames 33c and 33d, respectively.

Opening grooves 35a, 35b are aligned in the projection direction on the inner frame surfaces of the vertical frames 28c, 28d, 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, respectively, allowing them to move up and down. The resin vertical frames 34c, 34d are arranged to cover the interior-facing 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 similar that covers the interior-facing surface of the interior-side opening groove 35b. As a result, the interior-facing surface of the vertical frames 28c, 28d is essentially formed by the vertical frame attachment member 36.

The outer shoji screen 29 and the inner shoji screen 30 are ventilation shoji screens. The outer shoji screen 29 has a face material 38 supported on all four sides by a frame 39. The inner shoji screen 30 has a face material 40 supported on all four sides by a frame 41. The outer shoji screen 29 is positioned on the upper outside of the window frame 28 when closed. The inner shoji screen 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, made by arranging two sheets of glass with a spacer between them. The frame bodies 39, 41 have a composite structure combining a metal frame made of an extruded material such as an aluminum alloy with a resin frame made of an extruded material such as PVC.

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 exterior facing surface of the window frame 28, multiple lattices 31b supported by the lattice frame 31a and aligned vertically, and a screen door 31c installed on the interior side of the lattices 31b. The lattices 31b are, for example, horizontal bars. The lattice device 31 may be omitted.

2. Description of Each Part of the Fitting Next, the specific configuration of each part of the fitting 10 and its function and effect will be described.

2.1 First, the specific structure of the outer shoji screen 29 will be described.
3 and 4, the outer shoji screen 29 is configured such that a face material 38 is supported by a frame 39 having an upper frame 39a and a lower frame 39b, which are horizontal frames, and left and right vertical frames 39c, 39d. As described above, each frame 39a to 39b is configured by attaching a resin frame material made of PVC or the like to the interior facing surface of a metal frame material made of aluminum alloy or the like.

The upper frame 39a has an opening groove 44 that holds the upper edge of the panel 38. The lower frame 39b has an opening groove 45 that holds the lower edge of the panel 38, and a hollow portion 46 adjacent to the outer edge 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).

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

A metal hollow section reinforcement member 51 is placed in the hollow section 46 of the lower frame 39b. The hollow section reinforcement member 51 has a roughly U-shaped cross section and extends over approximately the entire length of the lower frame 39b. The material of the hollow section reinforcement member 51 may be the same as or similar to the material of the opening groove reinforcements 48-50.

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

2.2 Next, a fire prevention structure using the wire 55 and the sliding part 54 will be described.
As shown in Figure 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.

Each wire 55 is wound around a pulley 58 between its ends 55a and 55b, thereby moving the outer shoji screen 29 and the inner shoji screen 30 up and down alternately. 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 of the opening frame 12.

As shown in Figures 3 and 6A, the sliding element 54 has a main body 60 and a connecting fitting 61. The main body 60 is a resin part attached to the connecting fitting 61 and serves as a sliding part for the vertical frames 39c and 39d.

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 55a of the wire 55 is connected. The connecting piece 61b protrudes from the side of the resin main body portion 60, specifically from the projecting surface facing the lower frame 39b on the side opposite the vertical frames 28c and 28d, and is the portion that is connected to the lower frame 39b. The intermediate plate portion 61c is the portion between the wire attachment piece 61a and the connecting piece 61b.

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 in the XY direction and standing upright in the Y direction between them. As a result, the connecting fitting 61 is composed of a roughly crank-shaped metal plate overall. The material of the connecting fitting 61 may be the same as or similar to that of the opening groove reinforcements 48-50 and hollow section reinforcement 51 described above.

The connecting fitting 61 has a locking hole 62a, an insertion hole 62b, and an elongated hole 62c.

The locking hole 62a is a hole 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. The terminal member 56 includes an L-shaped metal plate 56a that is screwed to the first end 55a of the wire 55, and a screw 56b that is threaded into a screw hole formed in the metal plate 56a. The 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 non-removable state (see Figures 4 and 9), thereby connecting the wire 55 to the sliding element 54.

The insertion hole 62b is a hole 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, so that it is provided on a different surface from the locking hole 62a and is connected to the locking hole 62a. The 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 Figure 7, and with the shank 56b1 inserted through the locking hole 62a, the head 56b2 can be locked into the locking hole 62a.

The elongated hole 62c is a hole for adjusting the position of the terminal member 56 engaged in the engagement hole 62a in the forward direction. The elongated hole 62c extends along the width direction (Z direction) of the wire attachment piece 61a, i.e., the forward direction of the lower frame 39b. The elongated hole 62c is connected to the engagement hole 62a on the side opposite the insertion hole 62b. The width of the elongated hole 62c may be approximately the same as the 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 forward direction (see Figure 9). In other words, because the wire 55 is wound around the pulley 58, it hangs down at a position offset to one side of the forward center of the lower frame 39b. The long hole 62c eliminates misalignment of the wire 55 in the projection direction, allowing the wire 55 to hang as vertically as possible. The long hole 62c may be omitted.

As shown in Figures 7 to 9, the wire attachment piece 61a does not have an opening for the locking hole 62a or the elongated hole 62c at the end opposite the intermediate plate portion 61c. In other words, 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.

As shown in Figures 6A to 8, the connecting fitting 61 further has multiple connecting holes 63 in the connecting piece 61b and multiple mounting holes 64 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 section 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 section reinforcement member 51. In this case, the heads of the screws 66 are engaged with the connecting pieces 61b of the connecting fitting 61, and no plastic parts such as the main body portion 60 are positioned around them.

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 period of time, allowing the outer screen 29 to be suspended and supported by the wire 55 for a long period of 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 fitting 61 to the hollow section reinforcement 51 of the lower frame 39b, the outer screen 29 can be further prevented from falling or descending.

In addition, 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 of the fitting 10, the screw 56b, which has already been attached to the terminal member 56, can be easily connected to the sliding part 54. Furthermore, when the screw 56b is locked into the locking hole 62a, it is positioned so that it faces upward. 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 of the outer shoji screen 29 and improving the assembly efficiency of the outer shoji screen 29.

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 if it sways in the X direction during a fire, etc. 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 be shaped other than a crank, and in this case, it is also preferable that the insertion hole 62b be provided on a different surface from the locking hole 62a.

2.3 Next, a fire prevention structure using the crescent receiver 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.

As shown in Figures 5, 10A, and 10B, the crescent holder 70 has an attachment portion 70a and an engagement portion 70b.

The mounting portion 70a is a roughly rectangular metal plate that is positioned along the XY plane. A pair of left and right screw holes 70c are formed in the mounting portion 70a. Screws 72 are threaded into the screw holes 70c to secure the crescent holder 70 to the lower frame 39b. The mounting portion 70a is fixed to one of the pair of wall portions that form the opening groove 45, the indoor wall portion 74.

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 engages with the engaging portion 70b, it enters an engaged state in which the crescent 71 is suspended and supported as if it were gripping it from above.

The lower frame 39b has a hole 74a in the 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 the indoor protruding piece 49b that faces the indoor wall portion 74. The restriction hole 49c is formed in the portion of the indoor protruding piece 49b that includes the cut-out piece 49a.

The mounting portion 70a of the crescent support 70 is sandwiched between the indoor wall portion 74 of the lower frame 39b and the indoor protruding piece 49b of the opening groove reinforcement member 49, and is fastened to the indoor 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 threaded hole 70c, and the tip that has passed through the threaded hole 70c is inserted into the restriction hole 49c.

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 direction when the crescent holder 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 vertical direction between the crescent holder 70 and the opening groove reinforcement member 49.

For example, if the fitting 10 is affected by a fire from outside, the outer screen 29, located above the window frame 28 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 material 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 material 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 other member with a predetermined strength. The restriction hole 49c may also be a notched hole with a closed top.

As mentioned above, the restriction hole 49c is formed in the portion of the interior projection 49b that includes the cut-and-raised piece 49a. Therefore, as shown in Figure 3, even if a screw 72 of sufficient length is used so that it can be securely engaged in the restriction hole 49c, the tip that passes through the restriction hole 49c can be prevented from interfering with the panel 38 or the gasket that holds its lower edge.

It is preferable that the fitting 10 also be equipped with a fire-resistant structure using a crescent support 70 in addition to the fire-resistant structure provided by suspending the bottom frame 39b via the connecting fittings 61 connected to the wire 55 described above. This allows the wire 55 to support both the left and right ends of the bottom frame 39b, and the crescent support 70 to support the center of the bottom frame 39b, providing balanced support for the bottom frame 39b at three points. As a result, the fitting 10 can further prevent the surface material 38 and outer screen 29 from falling or descending.

However, the tip of the screw 72 is simply inserted into the restricting hole 49c of the opening groove reinforcement member 49. Therefore, if the lower frame 39b were to deform during a fire and the opening groove reinforcement member 49 were to move to the outside of the room, there is a concern that the screw 72 could fall out of the restricting hole 49c.

In the configuration example shown in Figures 10A and 10B, two additional screws 76 are provided, spanning the two screws 72. Holes 74b are formed in the indoor-side wall 74 of the lower frame 39b, through which the screws 76 are inserted, and threaded holes 49d are formed in the opening groove reinforcement 49, into which the screws 76 are threaded. The screws 76 are threaded into the threaded holes 49d while inserted through the holes 74b. This fastens the lower frame 39b and the opening groove reinforcement 49, restricting movement of the opening groove reinforcement 49 toward the outside of the room, 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 Figure 11.

The connection structure between the crescent holder 70 and the opening groove reinforcement member 49 may be other than the example configurations shown in Figures 10A to 11. For example, the connection structure shown in Figures 12A and 12B is a configuration in which the crescent holder 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 in the opening groove reinforcement member 49. Note that instead of the screw hole 70c, the crescent holder 70 has a through hole 70d, which is a so-called clearance hole.

Therefore, in the configuration example shown in Figures 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 screwed into the screw hole 78a of the back plate 78. As a result, even in this configuration, when the crescent holder 70 is fastened to the lower frame 39b, the tip of the screw 72 is locked in the restriction hole 49c, preventing the panel 38 and outer screen 29 from falling or descending.

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 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 screen 30 via the wire 55, and the crescent holder 70 is supported by the inner screen 30 via the crescent 71. The fitting 10 of this embodiment may further include a structure that links these two fire resistance structures together to further improve fire resistance.

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 support 70, is connected to the hollow section reinforcement member 51. The opening groove reinforcement member 49 has a pair of holes 49e at a position spanning the crescent support 70 in the X direction. The hollow section reinforcement member 51 has screw holes 51a at positions that overlap each hole 49e in the vertical direction. The screw holes 51a are formed in the upper plate portion of the hollow section reinforcement member 51.

The outer shoji screen 29 is therefore connected to the opening groove reinforcement 49 and hollow section reinforcement 51 by inserting the screw 80 from above the opening groove reinforcement 49 through the hole 49e and threading it into the screw hole 51a. The wall separating the opening groove 45 and hollow section 46 of the lower frame 39b has a through-hole coaxial with the hole 49e and the screw hole 51a, and the screw 80 is threaded through the hole 49e and this through-hole into the screw hole 51a.

The hollow section reinforcement 51, which is connected to the crescent receiver 70 via the opening groove reinforcement 49 as described above, is also connected to the connecting fittings 61 of the sliding part 54. The hollow section reinforcement 51 has screw holes 51b at positions that overlap vertically 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 51.

The outer shoji screen 29 is therefore connected to the opening groove reinforcement 49 and connecting fitting 61 by inserting a screw 66 from below the connecting piece 61b through the connecting hole 63 and threading it into the screw hole 51b. 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 projection surface 39b1, which is the underside of the lower frame 39b, and the screw 66 is installed through this through-hole.

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 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 achieves even higher fire resistance and can further prevent the surface material 38 and outer shoji screen 29 from falling or descending.

2.5 Next, we will explain the fire prevention structure 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.

First, as shown in Figures 3 to 6B, the hollow section reinforcement 51 of the lower frame 39b is connected to the opening groove reinforcement 50 of the vertical frames 39c and 39d. While Figures 4 to 6B illustrate the connection structure between the opening groove reinforcement 50 and hollow section reinforcement 51 of one vertical frame 39c, the connection structure between the opening groove reinforcement 50 and hollow section reinforcement 51 of the other vertical frame 39d may be a symmetrical structure.

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 protrudes downward from the plate portion that forms the visible surface of the opening groove reinforcement 50 and is bent inward toward the frame. Screw holes 50b are formed in the plate portion of the bent piece 50a that runs along the XZ plane. The hollow section reinforcement 51 has holes 51c at its left and right ends that overlap the screw holes 50b in the vertical direction. The holes 51c are formed in the upper plate portion of the hollow section reinforcement 51.

The frame body 39 of this embodiment employs a vertical recess structure in which the 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 abutted 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.

The outer shoji screen 29 is therefore connected between the hollow section reinforcement 51 and the opening groove reinforcement 50 by inserting a 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. 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.

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 and the opening groove reinforcement member 48 of one vertical frame 39c, but the connection structure between the opening groove reinforcement member 50 and the opening groove reinforcement member 48 of the other vertical frame 39d may be a symmetrical structure.

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 ends. The bent pieces 48a are plate pieces that extend from a portion of the plate section that runs 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 section on the XY plane of the bent piece 48a.

The opening groove reinforcement 50 of the vertical stiles 39c, 39d has a protruding piece 50c on part of the upper end of the plate portion that runs along the projected surface. The protruding piece 50c is a portion of the projected surface of the opening groove reinforcement 50 that protrudes upward. A hole 50d is formed in the protruding piece 50c.

In this embodiment, the frame body 39 employs a vertical recess structure in which the 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 abutted against the inner frame surface of the opening groove reinforcement 50, the bent piece 48a faces the inner frame surface of the protruding piece 50c, and the screw hole 48b and hole 50d are coaxially aligned. Therefore, the outer shoji screen 29 is connected to the opening groove reinforcement 48 and opening groove reinforcement 50 by inserting the screw 84 from the outside of the frame toward the inside of the frame through 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.

When connecting the upper frame 39a and the vertical frames 39c, 39d, for example, the opening groove reinforcement members 48, 50 are connected with screws 84 as described above, and then 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. The upper frame 39a and the vertical frames 39c, 39d are then fastened together with screws 86 (see also Figure 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. Reference numeral 87 in Figure 13A 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 frames 39c (39d).

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 section 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 surrounding 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 outer shoji screen 29 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 crescent support 70, can be supported by the other opening groove reinforcements 48, 50. As a result, the fitting 10 achieves even higher fire resistance and can further prevent the surface material 38 and outer shoji screen 29 from falling or descending.

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 structure, making its falling off a greater concern. Therefore, by connecting the opening groove reinforcement member 49 of the lower frame 39b, suspended by wire 55, to the opening groove reinforcement members 48 and 50 of the other frames 39a, 39c, and 39d, the effectiveness of preventing the face material 38 and outer shoji screen 29 from falling off is further improved.

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

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 held in place by being inserted into the 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 down from the exterior end of the frame's exterior visible surface, and an interior protruding piece 92b hanging down from the interior end. The groove 90 has an exterior wall portion 90a that faces the exterior of the exterior protruding piece 92a, and an interior wall portion 90b that faces 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.

However, the metal bottom frame 33b of the bottom frame 28b and the metal bottom stile 21b of the door frame 20 formed integrally with it are made of aluminum alloy, and so there is a possibility that they may soften in the event of a fire. If the metal bottom frame 33b and metal bottom stile 21b are subjected to the weight of the inner shoji screen 30 in their softened state, they may deform, raising the risk of the inner shoji screen 30 falling off or dropping from the window frame 28.

The fitting 10 of this embodiment may therefore 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 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.

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 between them. A reinforcing member 104 made of metal such as stainless steel or steel is placed in the hollow portion 102. Note that the partition wall 100 is not shown in Figure 15.

The reinforcing member 104 may be configured to include a vertical plate 104a that stands along the inner surface of the outdoor wall portion 21b1 that forms the outdoor facing surface of the metal stile 21b, an upper plate 104b that protrudes from the upper part of the vertical plate 104a toward the indoor side, and a lower plate 104c that protrudes from the lower part of the vertical plate 104a toward the indoor side. The vertical plate 104a and the upper plate 104b extend over substantially the entire length of the metal stile 21b. The lower plate 104c is located so as to overlap the left and right drain openings 21b2 formed at the bottom of the outdoor wall portion 21b1. Note that the outdoor wall portion 21b1 is not shown in Figure 16.

The vertical plate 104a and upper plate 104b of the reinforcing member 104 are arranged to encompass the 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 toward the center from both left and right ends of the upper plate 104b. The screw holes 108 are where screws are threaded to fasten the metal bottom frame 21b to the metal hanging frame 21c and metal door end frame 21d.

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 drain holes 100a are formed on the left and right sides of the partition wall 100. The upper plate 104b of the reinforcing member 104 has 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 surface 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.

In this way, the door frame 20 has the reinforcing material 104 surrounding the screw holes 108 that secure the screws 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 front frame 21d. Therefore, even if flames enter the hollow portion 102 through the drain outlet 21b2 during a fire, for example, the reinforcing material 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 front frame 21d during a fire. Furthermore, because the vertical plate 104a of the reinforcing material 104 extends across almost 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.

Next, as shown in Figures 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.

The thermal expansion member 110 is adhesively fixed to the upper surface of the upper plate 104b of the reinforcing member 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 member 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 member 104 and extends in the Y direction. The thermal expansion member 114 is adhesively fixed to the underside of the lower plate 104c of the reinforcing member 104 in a position overlapping the drain opening 21b2. The thermal expansion member 115 is adhesively fixed to the outer frame surface of the metal bottom frame 21b and extends over substantially the entire length of the metal bottom frame 21b.

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 connects to the outside, and a thermal expansion member 110 attached to the upper plate 104b directly below the drain hole 102a that connects from the hollow portion 102 to the groove portion 90. As a result, the building fixture 10 can prevent the formation of a through hole for flames or smoke that would connect from the drain outlet 21b2 through the hollow portion 102 to the groove portion 90 in the event of a fire.

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

3. Description of one embodiment of the fittings A fitting according to one embodiment of the present invention comprises a window frame having left and right vertical frames, an outer shoji screen that is supported by the window frame and has left and right sliding parts attached thereto that are guided along the left and right vertical frames and that is positioned on the upper outside of the window frame when closed, an inner shoji screen that is supported by the window frame and that is positioned on the lower inside of the window frame when closed, and a wire that has a first end connected to the outer shoji screen and a second end connected to the inner shoji screen, and is wound around a pulley between the first end and the second end, thereby moving the outer shoji screen and the inner shoji screen alternately up and down. The first end of the wire has a shaft and a head at the tip of the shaft, the head being larger in diameter than the shaft. The screw is connected to the sliding element. The sliding element has a connecting fixture with a wire attachment piece to which the screw is connected. The connecting fixture has a locking hole in the wire attachment piece, the hole width being larger than the outer diameter of the shaft and smaller than the outer diameter of the head. The connecting fixture also has an insertion hole communicating with the locking hole and located on a different surface from the locking hole, the hole width being larger than the outer diameter of the head. With this configuration, the connecting fixture has an insertion hole connected to the locking hole, allowing the head of the screw to be smoothly inserted and locked into the locking hole through the insertion hole. The head of the screw can be easily rotated with a tool such as a screwdriver, facilitating fine adjustment of the height of the outer screen, improving the efficiency of assembling the outer screen to the window frame. In addition, with this configuration, the insertion hole and the locking hole are located on different surfaces, so even if the wire or connecting fitting becomes misaligned during a fire, the screw will not fall out of the insertion hole, let alone the locking hole. As a result, the fitting can keep the outer screen suspended by the wire for a long time even during a fire, improving fire prevention performance.

The connecting fitting may be configured to include a connecting piece that connects to the bottom frame of the outer screen, and an intermediate plate portion that is provided between the wire attachment piece and the connecting piece and has the insertion hole formed therein. This makes it easy to make the surfaces of the connecting fitting where the locking hole and the insertion hole are formed differently.

The connecting fittings may be configured so that the intermediate plate portion rises in the vertical direction between the wire attachment piece and the connecting piece, and the overall configuration is made of a roughly crank-shaped metal plate. This improves the strength of the connecting fittings, providing even stronger support for the outer screen in the event of a fire.

The connecting fitting may also have a long hole that communicates with the locking hole on the side opposite the insertion hole, extends along the projection of the bottom frame, and has a hole width that is larger than the outer diameter of the shaft and smaller than the outer diameter of the head. This allows the fitting to easily adjust the position of the wire relative to the connecting fitting in the projection direction, allowing the wire to hang as vertically as possible.

The window may further include a door body, and the window frame may 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 outer screen more likely to fall off in the event of a fire, but this can be effectively prevented by a fireproof structure using connecting fittings, etc.

The present invention is not limited to the above-described embodiments, and can of course be freely modified without departing from the spirit of the present invention.

10. Door fitting, 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 screen, 30. Inner shoji screen, 39c, 39d. Vertical frame, 48-50. Opening groove reinforcement, 51. Hollow section reinforcement, 54. Sliding part, 55. Wire, 56. Terminal member, 60. Main body, 61. Connecting fitting, 61a. Wire attachment piece, 61b. Connecting piece, 61c. Intermediate plate, 70. Crescent holder, 71. Crescent

Claims (5)

It is a fixture,
a window frame having left and right vertical frames;
An outer shoji screen that is supported by the window frame and has left and right sliding parts that are guided along the left and right vertical frames and is positioned on the upper outside of the window frame when closed;
An inner shoji screen that is supported by the window frame and is arranged inside the lower part of the window frame when closed;
a wire having a first end connected to the outer screen and a second end connected to the inner screen, and wound around a pulley between the first end and the second end, thereby moving the outer screen and the inner screen alternately up and down;
Equipped with
a screw is provided at a first end of the wire, the screw having a shaft portion and a head portion provided at a tip of the shaft portion and having a diameter larger than that of the shaft portion, the screw being connected to the sliding element;
the sliding component has a connecting fitting provided with a wire attachment piece to which the screw is connected,
The connecting fitting is
a locking hole provided in the wire attachment piece, the locking hole having a hole width larger than an outer diameter of the shaft portion and smaller than an outer diameter of the head portion;
an insertion hole that is in communication with the locking hole and is provided on a surface different from the locking hole, the insertion hole having a hole width larger than an outer diameter of the head;
A fixture characterized by having: The fitting according to claim 1,
The connecting fitting is
A connecting piece connected to the bottom frame of the outer door;
an intermediate plate portion provided between the wire attachment piece and the connecting piece and having the insertion hole formed therein;
A fixture characterized by having: The fitting according to claim 2,
The connecting fitting is characterized in that the intermediate plate portion is arranged to stand upright in the vertical direction between the wire attachment piece and the connecting piece, and is composed of a metal plate that is approximately crank-shaped overall. The fitting according to claim 3,
The connecting fitting is characterized in that it communicates with the locking hole on the side opposite to the insertion hole, and further has a long hole extending along the projection direction of the bottom frame, with a hole width larger than the outer diameter of the shaft portion and smaller than the outer diameter of the head portion. The fitting according to any one of claims 1 to 4,
It also has a door body,
The window frame constitutes a ventilation unit attached to the door body.