JP7601657B2 - Fittings - Google Patents

Description

The present invention relates to fittings that are installed in openings in building structures.

Conventionally, for example, fittings have been known that have a frame body formed by assembling aluminum frame materials on all four sides, and the top surface of the lower frame is formed flat.

JP 2005-48558 A

In recent years, there has been a demand for improved fire resistance even in fittings having a flat sill as described in Patent Document 1 above.
The present invention aims to improve the fire resistance of building materials having a flat upper surface of the sill.

The fixture in this embodiment comprises a frame material and a shoji screen supported by the frame material, and the bottom frame of the frame material has an aluminum exterior bottom frame, an aluminum interior bottom frame, and a resin insulating bridge, with connecting fittings fixed to the exterior bottom frame and the interior bottom frame respectively and connecting the two, which are installed across the insulating bridge near the position of the shoji screen's rollers.

The fixture of this embodiment can improve fire resistance compared to fixtures in which the upper surface of the sill is formed to be approximately flush.

FIG. 1 is an external view of a fixture according to one embodiment. FIG. 2 is a vertical cross-sectional view of a fitting according to one embodiment. FIG. 2 is a cross-sectional view of a fitting according to one embodiment. These are vertical cross-sectional views of the bottom frame of a fixture for one embodiment, where (a) is a vertical cross-sectional view of the side where the outer shoji screen is located when the shoji screen is closed, and (b) is a vertical cross-sectional view of the side where the inner shoji screen is located when the shoji screen is closed. 13A and 13B are vertical cross-sectional views of the bottom frame of a fixture according to another embodiment, where (a) and (b) are vertical cross-sectional views of the side where the outer screen is located when the screen is closed. FIG. 2 is a perspective view of the lower portion of the fitting according to one embodiment. 1A and 1B are perspective views of a rail-to-rail attachment for a fixture according to one embodiment, where (a) is a view of the rail-to-rail attachment with end caps attached, and (b) is a view of the end caps. 1A is a diagram of the lower frame of a fixture according to one embodiment, where (a) is a partially enlarged vertical cross-sectional view of the lower frame, (b) is a front view of a spacer, and (c) is a side view of the spacer. FIG. This is a diagram of the bottom frame of a building fixture in one embodiment, where (a) is a partially enlarged vertical cross-sectional view of the bottom frame, (b) and (d) are front views of the connecting fittings, and (c) and (e) are side views of the connecting fittings. 1A is a front view of the connecting fittings, FIG. 1B is a side view of the connecting fittings, and FIG. 1C is an enlarged vertical cross-sectional view of a portion of the bottom frame. 1A is a front view of the connecting fittings, FIG. 1B is a side view of the connecting fittings, and FIG. 1C is an enlarged vertical cross-sectional view of a portion of the bottom frame. FIG. 1 is a vertical cross-sectional view of the lower frame part of a fixture that connects an indoor component and an outdoor component with a resin insulating bridge, where (a) is a vertical cross-sectional view under normal conditions and (b) is a vertical cross-sectional view during a fire.

One embodiment of the fixture will be explained with reference to the drawings, using the example of a sliding window in which the inner and outer screens are supported on the inner periphery of the frame so that they can be slid freely.

(Overall composition)
As shown in Figure 1, the fittings of this embodiment are formed by assembling an upper frame 11, a lower frame 12, and left and right vertical frames 13, 14 around the inner periphery of a frame body 1, and by assembling upper frames 21, 31, lower frames 22, 32, and left and right vertical frames 23, 24, 33, 34 around the inner periphery, and fitting panel bodies 25, 35 around the inner periphery, the inner and outer screens 2, 3 are supported so that they can be slid freely between each other.

(Frame)
As shown in Figure 2, the upper frame 11 that constitutes the frame body 1 has an aluminum indoor upper frame 111 that is arranged on the indoor side inner periphery of the building opening A, an aluminum outdoor upper frame 112 that is arranged on the outdoor side of the indoor upper frame 111, and a resin bridge member 113 that connects the indoor upper frame 111 and the outdoor upper frame 112.

The indoor upper frame 111 has a concealed wall 111a that faces the inner periphery of the building opening A, an indoor visible wall 111b that is connected to the indoor end of the concealed wall 111a, and an upper inner rail 111c that extends downward from the outdoor inner periphery of the concealed wall 111a.

The indoor side resin upper frame 114 is arranged from the lower end of the upper inner rail 111c of the indoor side upper frame 111 to the lower end of the indoor side visible wall 111b, and the indoor side upper frame 111 and the indoor side resin upper frame 114 are fixed to the inner peripheral wall of the building opening A by fixing means b11 such as screws.

The indoor resin upper frame 114 has an angle portion 114b that extends further downward from the lower end of the indoor visible wall 111b of the indoor upper frame 111 and then bends and extends toward the indoor side, and the angle portion 114b is fixed to the frame member B placed in the building opening A by a fixing means b12 such as a screw.

The exterior upper frame 112 has a projection wall 112a, an exterior projection wall 112b connected to the exterior end of the projection wall 112a, an upper outer rail 112c extending downward from the exterior lower surface of the projection wall 112a, and a mounting piece 112d extending in the outer circumferential direction from the outer circumferential surface of the projection wall 112a, and the mounting piece 112d is fixed to the exterior surface of the building opening A by a fixing means b13 such as a screw.

A wind-stop member is provided on the underside of the upper frame 11 at the joint, and a resin cover 115 is arranged on the underside between the wind-stop member and the left vertical frame 13, from the upper inner rail 111c to the upper outer rail 112c.

As shown in FIG. 2, the lower frame 12 constituting the frame body 1 has an aluminum interior lower frame 121 that is arranged on the interior side of the building opening A, an aluminum exterior lower frame 122 that is arranged on the exterior side of the interior lower frame 121, and a resin insulating bridge 123 that connects the interior lower frame 121 and the exterior lower frame 122.

The indoor side lower frame 121 has a hollow indoor side lower frame main body 121a that is installed on the inner peripheral surface of the building opening A, an indoor side visible wall 121b that extends upward from the indoor side of the indoor side lower frame main body 121a, an angle portion 121c formed by bending the upper end of the indoor side visible wall 121b toward the indoor side, a lower inner rail 121d that extends upward from the outdoor side of the indoor side lower frame main body 121a, and an attachment piece 121e that extends from the indoor side of the indoor side lower frame main body 121a toward the indoor side. A bridge holding portion 121g that holds the insulating bridge 123 is provided on the outdoor side surface of the indoor side lower frame main body 121a.

The indoor side lower frame 121 has the mounting piece 121e fixed to the inner peripheral surface of the building opening A by a fixing means b21 such as a screw, and the angle part 121c fixed to the frame member B placed in the building opening A by a fixing means b22 such as a screw.

The exterior lower frame 122 has a hollow exterior lower frame body 122a, an exterior bottom wall 122b extending from the exterior side of the exterior lower frame body 122a toward the exterior, an exterior visible wall 122c extending upward from the exterior end of the exterior bottom wall 122b, a lower outer rail 122d extending upward from the inner circumferential surface of the exterior lower frame body 122a, and a mounting piece 122e extending downward from the interior side of the exterior lower frame body 122a, and the mounting piece 122e is fixed to the exterior surface of the building opening A by a fixing means b23 such as a screw.

As shown in FIG. 3, the left vertical frame 13 that constitutes the frame body 1 has a projection wall 13a that is fixed to the building opening A, an interior projection wall 13b that extends in the projection direction from the interior end of the projection wall 13a, an exterior projection wall 13c that extends in the projection direction from the exterior end of the projection wall 13a, a central projection wall 13d that extends inward from near the center in the projection direction of the projection wall 13a, a pull-in wall 13e that extends inward from the exterior inner peripheral surface of the projection wall 13a, and an attachment piece 13f that extends inward from the exterior outer peripheral surface of the projection wall 13a.

The left vertical frame 13 has an attachment piece 13f fixed to the exterior surface of the building opening A by a fixing means b32 such as a screw, and a plastic left vertical frame 132 is arranged on the inner periphery between the interior facing wall 13b and the central facing wall 13d, and the facing wall 13a of the left vertical frame 13 and the plastic left vertical frame 132 are fixed to the inner periphery of the building opening A by a fixing means b31 such as a screw. The plastic left vertical frame 132 also has an angle portion 132a, which is fixed to the frame member B by a fixing means b33 such as a screw.

As shown in FIG. 3, the right vertical frame 14 that constitutes the frame body 1 has a projection wall 14a that is fixed to the building opening A, an interior projection wall 14b that extends in the projection direction from the interior end of the projection wall 14a, an exterior projection wall 14c that extends in the projection direction from the exterior end of the projection wall 14a, a central projection wall 14d that extends inward from the center in the projection direction of the projection wall 14a, a pull-in wall 14e that extends inward from the interior inner peripheral surface of the projection wall 14a, and an attachment piece 14f that extends inward from the exterior peripheral surface of the projection wall 14a near the interior.

The right vertical frame 14 has the mounting piece 14f fixed to the exterior surface of the building opening A by a fixing means b42 such as a screw, and the resin right vertical frame 142 is arranged on the inner periphery between the interior visible wall 14b and the pull-in wall 14e, and the projection wall 14a of the right vertical frame 14 and the resin right vertical frame 142 are fixed to the inner periphery of the building opening A by a fixing means b41 such as a screw. The resin right vertical frame 142 also has an angle portion 142a, which is fixed to the frame member B by a fixing means b43 such as a screw.

(Shoji screen)
As shown in Figures 2 and 3, the inner screen 2 and the outer screen 3 have similar upper and lower frames and door end frames, so here we will mainly use the inner screen 2 to explain the inner and outer screens, and will explain the outer screen 3 in terms of its structure that differs from that of the inner screen 2.

As shown in Figure 2, the upper frame 21 that constitutes the inner screen 2 has a metal upper frame 211 made of aluminum and a resin upper frame 212 made of resin.
The metal upper frame 211 has a frame main body 211a with a hollow portion, an exterior glass front wall 211b extending inward from the exterior side of the frame main body 211a, and a rail guide portion 211c continuing to the outer periphery of the frame main body 211a.

The plastic upper frame 212 is attached to the indoor side of the metal upper frame 211 and has a plastic upper frame body 212a that covers the indoor side of the upper frame body portion 211a and the rail guide portion 211c, and an indoor side glass front wall 212b that is continuous in the inner circumferential direction of the plastic upper frame body 212a.

The upper frame 21 has a glass opening formed by the exterior glass opening wall 211b of the metal upper frame 211 and the interior glass opening wall 212b of the resin upper frame 212. Glass opening reinforcement material is placed within the glass opening to prevent the glass from coming loose (falling off), and the panel body 25 is held in place via a grating channel.

As shown in Figure 2, the bottom frame 22 that constitutes the inner screen 2 has a metal bottom frame 221 made of aluminum and a resin bottom frame 222 made of resin.
The metal frame 221 has a frame main body 221a having multiple hollow portions, an exterior glass frontage wall 221b extending inward from the exterior side of the frame main body 221a, and a hanging piece 221c extending downward from the exterior side of the frame main body 221a, and a wheel 92 is arranged from the hollow portion below the frame main body 221a to the interior side of the hanging piece 221c.

The resin bottom frame 222 is attached to the indoor side of the metal bottom frame 221 and has a resin bottom frame body 222a that has multiple hollows and covers the indoor side of the bottom frame body 221a, and an indoor side glass front wall 222b that is continuous in the inner circumferential direction of the resin bottom frame body 222a.

The bottom frame 22 has a glass opening formed by the exterior glass opening wall 221b of the metal bottom frame 221 and the interior glass opening wall 222b of the resin bottom frame 222. A glass opening reinforcement material is placed within the glass opening, and the panel body 25 is held in place via a grating channel.

The left vertical frame (joint frame) 23 that constitutes the inner shoji 2 has, as shown in Figure 3, a metal left vertical frame 231 made of aluminum and a resin left vertical frame 232 made of resin.
The metal left vertical frame 231 has a left vertical frame main body 231a with two hollow portions lined up in the forward direction, an indoor side glass front wall 231b extending inwardly from the indoor side inner circumferential surface of the left vertical frame main body 231a, and an outdoor side glass front wall 231c extending inwardly from the outdoor side inner circumferential surface of the left vertical frame main body 231a.

A steel reinforcing member with a U-shaped cross section is placed in the hollow portion on the outside of the left vertical frame body 231a and the hollow portion on the inside of the room, and both reinforcing members are connected via a partition wall that separates the hollow portion on the outside of the room from the hollow portion on the inside of the room.

The resin left vertical frame 232 is attached to the outer periphery and interior side of the metal left vertical frame 231, and has a visible wall portion 232a and an inner periphery wall portion 232c that cover the interior side (including the inner periphery) of the left vertical frame main body portion 231a and the interior side of the interior glass front wall 231b, and a visible wall portion 232b that covers the outer periphery of the left vertical frame main body portion 231a.

The left vertical frame 23 has a glass opening formed by the exterior glass opening wall 231c and the interior glass opening wall 231b of the metal left vertical frame 231, with glass opening reinforcement material placed within the glass opening and the panel body 25 held in place via a grating channel.

The right vertical frame (door end frame) 24 that constitutes the inner shoji screen 2 has a metal right vertical frame 241 made of aluminum and a resin right vertical frame 242 made of resin, as shown in Figure 3.
The metal right stile 241 has a right stile main body 241a with a hollow portion, an exterior glass frontage wall 241b extending inward from the exterior side of the right stile main body 241a, and a door-end groove portion 241c that continues to the outer periphery of the right stile main body 241a.

The resin right vertical frame 242 is attached to the interior side of the metal right vertical frame 241 and has a resin right vertical frame body 242a that covers the interior side of the right vertical frame body portion 241a and the door end side groove portion 241c, and an interior side glass frontage wall 242b that is continuous in the inner circumferential direction of the resin right vertical frame body 242a.

The right vertical frame 24 has a glass opening formed by the exterior glass opening wall 241b of the metal right vertical frame 241 and the interior glass opening wall 242b of the resin right vertical frame 242. A glass opening reinforcement material is placed within the glass opening, and the panel body 25 is held in place via a grating channel.

As shown in Figure 3, the right vertical frame (joint frame) 34 that constitutes the outer shoji screen 3 has a right vertical frame main body 341a made of aluminum with a hollow section, and a glass opening that continues to the inner circumference side of the right vertical frame main body 341a. Note that the upper and lower frames 31, 32 and the left vertical frame (door end frame) 33 that constitute the outer shoji screen 3 have the same structure as the inner shoji screen 2, so their explanation will be omitted here.

The basic configuration of the sliding window of this embodiment has been explained above. The sliding window of this embodiment has a flat upper surface of the lower frame to facilitate smooth entry and exit, while also improving the fire resistance of the lower frame with its flat upper surface.
The bottom frame of the building fixture of this embodiment will be described in detail below.

- Composition of the lower frame -
As shown in Figures 4 (a) and (b) , the lower frame 12 of the fitting of this embodiment is formed by connecting an indoor side lower frame 121 and an outdoor side lower frame 122 by an insulating bridge 123.

The lower frame 12 has a resin cap member 124 arranged between the indoor side visible wall 121b of the indoor side lower frame 121 and the lower inner rail 121d, an aluminum inter-rail attachment 125 arranged between the lower inner rail 121d of the indoor side lower frame 121 and the lower outer rail 122d of the outdoor side lower frame 122, and an aluminum lower frame cover member 126 arranged between the lower outer rail 122d and the outdoor side visible wall 122c, so that the upper surface is formed to be approximately flush, i.e. flat.

The lower frame 12 has a guide groove 12a formed between the lower inner rail 121d and the rail-to-rail attachment 125 to guide the hanging piece 221c of the bottom frame 22 of the inner screen 2, and a guide groove 12b formed between the lower outer rail 122d and the lower frame cover member 126 to guide the hanging piece of the bottom frame 32 of the outer screen 3. This stabilizes the movement of the inner and outer screens 2 and 3, and forms an airtight line between the inner and outer screens 2 and 3 and the lower frame 12 by placing airtight material in the guide grooves 12a and 12b.

The bottom frame 12 has heated foaming material f placed on the exterior side of the lower outer rail 122d and on the bottom near the lower end of the outer lower rail 122d on the outer screen 3 side (the side where the outer screen 3 is located when the screen is closed) shown in Figure 4 (a), and heated foaming material f is placed on the exterior side of the lower inner rail 121d on the inner screen 2 side (the side where the inner screen 2 is located when the screen is closed) shown in Figure 4 (b), which fills the guide grooves 12a and 12b in the event of a fire, preventing the occurrence of gaps between the bottom frame 12 and the inner and outer screens 2 and 3 that communicate with the interior and exterior of the room.

- Rail attachment -
The rail-to-rail attachment 125 arranged on the upper surface of the lower frame 12 is a long member having a hollow shape with an approximately rectangular cross-section, i.e., a hollow cross-section, and as shown in Figure 6, the rail-to-rail attachment 125 arranged on the outer screen 3 side of the lower frame 12 and the rail-to-rail attachment 125 arranged on the inner screen 2 side are arranged with a plastic water-stopping piece 71 in between, and a plastic end cap 72 is attached to the ends of both rail-to-rail attachments 125, 125 opposite the side where the water-stopping piece 71 is provided, i.e., the ends on the left and right vertical frames 13, 14 sides.

As shown in Figures 4 and 7(a), short resin bottom frame guides 73 are attached to the underside of the rail-to-rail attachment 125 at multiple positions, and the rail-to-rail attachment 125 is positioned with the bottom frame guides 73 sandwiched between it and the exterior bottom frame 122, so that the rail-to-rail attachment 125 is positioned at a predetermined distance from the exterior bottom frame 122.

As shown in Figure 8 (a), the rail-to-rail attachment 125 has a hollow main body portion 125a with a flat upper surface, legs 125b extending downward from the lower part of the exterior side of the main body portion 125a, and a mounting portion 125c extending toward the interior of the room from the interior side of the main body portion 125a, and an airtight material retaining groove 125d is formed in the upper part of the interior side of the main body portion 125a.
In addition, an airtight material retaining groove 121f is formed on the exterior side of the lower inner rail 121d of the interior side lower frame 121 so as to face the airtight material retaining groove 125d of the inter-rail attachment 125.

The rail-to-rail attachment 125 has heated foaming materials f1, f2 provided on the exterior side and underside of the main body 125a over almost the entire length of the rail-to-rail attachment 125, and a heated foaming material f3 is provided on the water-stopping piece side within the hollow portion of the main body 125a.
In addition, the heated foaming materials f1, f2 provided on the exterior side and underside of the main body 125a of the rail-to-rail attachment 125 do not necessarily have to be provided over the entire length of the rail-to-rail attachment 125.

The end cap 72 attached to the frame side end of both inter-rail attachments 125 has an attachment portion 72a that is inserted into the hollow portion of the inter-rail attachment 125 and a cap portion 72b that covers the end of the inter-rail attachment 125, as shown in FIG. 7(b), and a heated foaming material f4 is placed on the projecting surface of the cap portion 72b.

As described above, in the fitting of this embodiment, the rail-to-rail attachment 125 for flattening the top surface of the bottom frame 12 is formed separately from the bottom frame 12 and is arranged via a short resin bottom frame guide 73. This prevents metal-to-metal contact between the rail-to-rail attachment 125 and the exterior bottom frame 122 of the bottom frame 12, and prevents the rail-to-rail attachment 125 from wobbling. This makes it less likely that the rails will be damaged when the rail-to-rail attachment 125 is attached or detached during cleaning, and also makes it easier to attach and detach.

In addition, since the lower frame guide 73 is short, it ensures a drainage path in the lower frame 12 and reduces the amount of flammable materials used, thereby suppressing the spread of fire in the event of a fire.
In addition, since the heated foaming materials f1, f2 provided on the exterior side and underside of the rail-to-rail attachment 125 are provided in the space formed by the lower frame guide 73, it is possible to prevent the heated foaming materials from coming into contact with water passing over the upper surface of the lower frame 12 and getting wet.

In the event of a fire, the heated foaming materials f1 and f2 foam, blocking the gap between the rail-to-rail attachment 125 and the lower frame 12, which is formed by the lower frame guide 73. In addition, because the heated foaming material f3 is provided on the water-stop piece side in the hollow portion of the rail-to-rail attachment 125, even if the resin water-stop piece 71 melts in the event of a fire, communication between the inside and outside of the room at the bottom of the joint of the lower frame 12 is suppressed, and smoke, gas, etc. are prevented from entering the room through the hollow portion of the rail-to-rail attachment 125.

In addition, in the fittings of this embodiment, the heated foaming material f4 is provided on the projecting surface of the end caps 72 attached to the ends of the left and right vertical frames of the rail-to-rail attachment 125. Even if the resin end caps 72 melt during a fire, communication between the left and right vertical frames 13, 14 and the ends of the rail-to-rail attachments 125, 125 is prevented from opening in the indoor and outdoor directions. The heated foaming material f4 foams and enters the hollow portion of the rail-to-rail attachment 125 in place of the melted end caps 72, preventing smoke, gas, etc. from entering the room through the hollow portion of the rail-to-rail attachment 125.

-Outside hollow space-
The lower frame cover member 126, which is arranged on the upper surface of the lower frame 12, has, as shown in Figure 4 (a), an indoor side visible wall 126a, an upper wall 126b formed by the upper end of the indoor side visible wall 126a extending to the outside of the room, a locking piece 126c formed on the outdoor side of the upper wall 126b, and a hanging portion 126d extending downward from the underside of the upper wall 126b.

The lower frame cover member 126 is attached to the exterior lower frame 122 with the lower end of the interior visible wall 126a abutting against the upper surface of the exterior bottom wall 122b of the exterior lower frame 122 and the locking piece 126c engaging with the upper end of the exterior visible wall 122c of the lower frame 12. The exterior lower frame 122 and the lower frame cover member 126 form an exterior hollow portion 12c on the exterior side of the lower frame 12.

As shown in Figures 2, 3, and 6, the exterior hollow portion 12c protrudes outside the room beyond the left and right vertical frames 13, 14 in the projection direction, and resin lower frame end caps 76, 76 are attached to both ends of the exterior hollow portion 12c.

As shown in FIG. 4(a), a lower frame cover reinforcement member 81 is disposed within the outdoor hollow portion 12c of the lower frame 12. The lower frame cover reinforcement member 81 has a projection portion 81b that faces the upper wall of the outdoor hollow portion 12c (the upper wall 126b portion of the lower frame cover member 126) and a facing portion 81a that faces the indoor side wall of the outdoor hollow portion 12c (the indoor side facing wall 126a portion of the lower frame cover member 126).

The lower frame cover reinforcement material 81 is made of a metal material such as steel, and the visible portion 81a is fixed to the indoor side visible wall 126a of the lower frame cover member 126 by screws with the projection portion 81b abutting the underside of the upper wall 126b of the lower frame cover member 126, and the visible portion 81a is positioned so as to cover at least the indoor side wall of the outdoor side hollow portion 12c from the outdoor side.
The lower frame cover reinforcement material 81 has a heating foaming material f, which foams in the event of a fire, arranged on the outdoor side surface of the facing portion 81a.

In addition, within the outdoor hollow portion 12c of the bottom frame 12, a bottom frame reinforcement member 82 having a generally L-shaped cross section is arranged, the bottom frame reinforcement member 82 having a projection portion 82a facing the bottom wall of the outdoor hollow portion 12c (the outdoor bottom wall 122b portion of the outdoor bottom frame 122) and a projection portion 82b facing the outdoor wall of the outdoor hollow portion 12c (the outdoor projection wall 122c portion of the outdoor bottom frame 122).

The lower frame reinforcement 82 is made of a metal material such as steel, and the projection 82a is fixed to the exterior bottom wall 122b by screws.
A heating foaming material f that foams in the event of a fire is arranged on the indoor side of the outdoor exterior wall 122c of the outdoor lower frame 122.

As described above, the building fixture of this embodiment can improve the strength of the exterior hollow portion 12c by providing a lower frame cover reinforcement material 81 having a facing portion 81a that faces the interior wall of the exterior hollow portion 12c of the lower frame 12.
Furthermore, since the lower frame cover reinforcement material 81 has a projection portion 81b facing the upper wall of the outdoor hollow portion 12c, the strength of the outdoor hollow portion 12c can be further improved.Even when the upper surface of the outdoor hollow portion 12c protrudes outside the room beyond the left and right vertical frames 13, 14 and is in a cantilevered state, a lower frame can be formed whose upper surface is horizontal and approximately flush (flat).

The heated foaming material f that foams in the event of a fire is disposed on the outdoor side surface of the visible portion 81a of the lower frame cover reinforcement material 81, which is arranged so as to cover at least the indoor side wall of the outdoor side hollow portion 12c from the outdoor side. By foaming toward the outdoor side hollow portion 12c in the event of a fire, the indoor side wall of the outdoor side hollow portion 12c can be protected, thereby improving fire resistance.

In addition, the fittings of this embodiment are provided with a lower frame reinforcement 82 having a projection 82a and a projection 82b that face the exterior bottom wall 122b and the exterior visible wall 122c of the lower frame 12 in the exterior hollow portion 12c of the lower frame 12, thereby further improving the strength of the exterior hollow portion 12c and protecting the interior wall of the exterior hollow portion 12c from flames from below, thereby improving fire resistance.

The heated foaming material f is provided on the indoor side of the outdoor facing wall 122c, so that in the event of a fire, foaming occurs between the outdoor wall of the outdoor hollow section 12c and the facing section 82b of the lower frame reinforcement material 82, protecting the outdoor side of the outdoor hollow section 12c and further improving fire resistance.

In addition, the reinforcing material to be placed in the outdoor hollow portion 12c of the lower frame 12 may be only either the lower frame cover reinforcing material 81 or the lower frame reinforcing material 82.
For example, as shown in Figure 5 (a), only the lower frame cover reinforcement material 81 may be placed in the outdoor hollow portion 12c of the lower frame 12, and a heated foaming material f may be placed on the outdoor side of the visible portion 81a of the lower frame cover reinforcement material 81 and/or on the indoor side of the outdoor visible wall 122c of the lower frame 12.

In the event of a fire, the heated foaming material f arranged on the exterior side of the visible portion 81a of the lower frame cover reinforcement 81 and/or the interior side of the exterior visible wall 122c of the lower frame 12 foams toward the exterior hollow portion 12c of the lower frame 12, and in this embodiment, between the exterior wall of the exterior hollow portion 12c and the visible portion 81a of the lower frame cover reinforcement 81, thereby protecting the exterior hollow portion 12c and improving fire resistance.

Also, as shown in FIG. 5(b), only the lower frame reinforcement material 82 may be placed in the outdoor hollow portion 12c of the lower frame 12, and the heated foaming material f may be placed on at least one of the outdoor side and indoor side of the visible portion 82b of the lower frame reinforcement material 82.

In the event of a fire, the heated foaming material provided on the indoor side of the visible portion 82b of the lower frame reinforcement 82 foams in the outdoor hollow portion 12c of the lower frame 12, protecting the indoor wall of the outdoor hollow portion 12c and improving fire resistance. In addition, the heated foaming material provided on the outdoor side of the visible portion 82b of the lower frame reinforcement 82 foams immediately when the outdoor side of the lower frame 12 is heated by flames, covering the outdoor side of the reinforcement, prolonging the maintenance of the outdoor hollow portion 12c by the reinforcement and suppressing the melting of the lower outer rail 122d, further improving fire resistance.

When a lower frame cover reinforcement material 82 is provided in addition to the lower frame cover reinforcement material 81, the heated foaming material f placed on the visible portion 81a of the lower frame cover reinforcement material 81 may be omitted, as shown in FIG. 4(b). Even when a lower frame reinforcement material 82 is provided in addition to the lower frame cover reinforcement material 81, heated foaming material may be provided on both the exterior side and the interior side of the visible portion 82b of the lower frame reinforcement material 82.

Furthermore, when placing the heated foaming material, the outdoor hollow portion 12c of the lower frame 12 is formed by a lower frame cover member 126 that is separate from the outdoor lower frame 122 of the lower frame 12, so the heated foaming material can be easily placed in the outdoor hollow portion 12c, making it easy to install.

-Connecting fittings-
As shown in Figures 4 and 8 (a), the lower frame 12 is between the lower inner rail 121d of the indoor side lower frame 121 and the lower outer rail 122d of the outdoor side lower frame 122, and multiple resin spacers 74 are arranged on the indoor side of the inter-rail attachment 125.

As shown in Figures 8(b) and (c), the spacer 74 is shaped like a block with a mounting surface 74b at an upper position on the exterior side, and is positioned with its lower surface 74a placed on the upper surface of the bridge retaining portion 121g of the interior lower frame 121. The mounting surface 74b supports the mounting portion 125c of the inter-rail attachment 125, preventing the inter-rail attachment 125 from falling over and allowing the upper surface of the lower frame 12 to be stably attached so that it is horizontal.

As shown in FIG. 9(a), the bottom frame 12 is in a position where there is no bottom frame guide 73 in the left-right direction, and when the screen is closed, the connecting fittings 75 that connect the outside bottom frame 122 and the inside bottom frame 121 are connected across the insulating bridge 123 at or near the roller positions of the inner and outer screens 2 and 3 (hereinafter referred to as "near the roller positions").

The connecting fitting 75 is a short member made of a metal material such as aluminum, and as shown in Figures 9 (b) and (c), it has a flat outdoor fixing part 75a that is fixed to the upper surface of the outdoor lower frame body part 122a of the outdoor lower frame 122, and a block-shaped indoor fixing part 75b that is fixed to the indoor lower frame body part 121a of the indoor lower frame 121.

The connecting fitting 75 has two through holes 75c, 75c that penetrate in the vertical direction z1 formed in the exterior fixing part 75a, and are aligned along the length of the connecting fitting 75. The interior fixing part 75b has two through holes 75d, 75d that penetrate diagonally downward z2 from the top to the interior side of the room when the connecting fitting 75 is fixed to the lower frame 12.

On the other hand, the exterior lower frame 122 has a screw hole threaded from above in the vertical direction z1 in the upper wall of the exterior lower frame body part 122a to which the connecting fitting 75 is fixed, and the interior lower frame 121 has a screw hole threaded diagonally downward in the z2 in the exterior facing wall of the interior lower frame body part 121a to which the connecting fitting 75 is fixed.

The connecting fitting 75 is then placed across the insulating bridge 123 between the indoor lower frame 121 and the outdoor lower frame 122, and the outdoor fixing part 75a is screwed to the outdoor lower frame 122 and the indoor fixing part 75b is screwed to the indoor lower frame 121, thereby connecting the indoor lower frame 121 and the outdoor lower frame 122.

The connecting fitting 75 is not limited to a block shape, but may be formed by bending a plate-shaped member to form an exterior fixing part 75a and an interior fixing part 75b, and forming through holes 75c, 75c, 75d, and 75d, as shown in Figures 9(d) and (e).

Furthermore, in the fittings of the above embodiment, the connecting fittings 75 and the spacers 74 are provided as separate bodies, but the connecting fittings 75 and the spacers 74 may be formed integrally.
For example, as shown in Figures 10(a), (b), and (c), the connecting fitting 75 may have a shape in which a spacer portion 75e having a mounting surface 75f for placing the mounting portion 125c of the rail-to-rail attachment 125 is integrally formed with a part of the indoor fixing portion 75b, specifically between the left and right through holes 75d, 75d.

As shown in FIGS. 11(a), 11(b), and 11(c), the connecting fitting 75 may have a shape in which a block-shaped spacer portion 75e is fixed to a plate-shaped connecting fitting.
By forming the connecting fitting 75 and the spacer 74 as an integral part, workability can be improved.

Furthermore, as shown in FIGS. 10 and 11, the connecting fitting 75 may be provided with an insulating sheet 75g on the surface that spans the insulating bridge 123.
By providing an insulating sheet 75g on the underside of the connecting fitting 75, the transfer of cold heat from the outdoor lower frame 122 to the indoor lower frame 121 by the connecting fitting 75 can be suppressed, and the insulating effect of the insulating bridge 123 can be prevented from being reduced.

As described above, the fittings of this embodiment connect the indoor side sill 121 and the outdoor side sill 122 of the sill 12 with the connecting fittings 75, which can prevent a situation in which the insulating bridge 123 melts in the early stages of a fire, causing the outdoor side sill 122 to fall outside and the outer screen 3 to come off (Figures 12(a) and (b)).

In this embodiment of the fittings, the connecting fittings 75 connect the inside sill 121 and the outside sill 122 at or near the roller positions of the inner and outer screens 2 and 3, so that the load of the inner and outer screens 2 and 3 applied to the sill 12 can be borne by the parts connected by the connecting fittings 75, improving the strength of the screens (especially the outer screen 3) against the load.

In addition, the connecting fittings 75 can be fixed from the inner periphery of the existing fixture, as the exterior fixing part is fixed by a screw into the vertical screw holes, and the interior fixing part is fixed by a screw fastener diagonally downward from the upper outside to the lower inside. This provides strength and fire resistance to the existing sill.
In addition, the connecting fittings 75 can be placed within the space between the inter-rail attachment 125 formed by the lower frame guide 73 and the lower frame 12, so that the existing components of the lower frame 12 can be reinforced without changing them, and after reinforcement, the connecting fittings are positioned below and covered by the inter-rail attachment 125, resulting in good design characteristics.

Needless to say, the above embodiments do not limit the invention described in the claims, but are treated as examples.

12: Lower frame 12c: Outdoor hollow portion 71: Water stop piece 72: End cap 73: Lower frame guide 74: Spacer 75: Connecting fitting 75a: Outdoor fixing portion 75b: Indoor fixing portion 75c: Through hole 75d: Through hole 81: Lower frame cover reinforcement material 81a: Visible portion 81b: Visible portion 82: Lower frame reinforcement material 81a: Visible portion 81b: Visible portion 92: Door roller 121: Indoor side lower frame 121a: Indoor side lower frame main body portion 121b: Indoor side visible wall 121d: Lower inner rail 122: Outdoor side lower frame 122a: Outdoor side lower frame main body portion 122b: Outdoor side bottom wall 122c: Outdoor side visible wall 122d: Lower outer rail 123: Insulation bridge 125 : Rail-to-rail attachment 126 : Lower frame cover member 126a : Interior side facing wall 126b : Upper wall f1-f4: Heated foam material

Claims (1)

It has a bottom frame and a shoji screen supported by the bottom frame.
The lower frame has an aluminum outer lower frame, an aluminum inner lower frame, and a resin insulating bridge.
A fixture in which connecting fittings are fixed to the outside sill and the inside sill, respectively, and connect the two, and are installed across the insulating bridge near the position of the shoji screen wheels.

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