Building materials

Abstract

To provide a fitting capable of securing both fireproof performance and space for a kendon. [Solution] The building fixture comprises a frame body having an upper frame with a first opening groove and a lower frame with a second opening groove, and a surface material whose upper and lower edges are supported by a butt-type mechanism against the first opening groove and the second opening groove, wherein the upper frame is formed so that the groove depth of the first opening groove is deeper than the groove depth of the second opening groove, and has a hollow portion on the outer periphery of the bottom of the first opening groove, and is equipped with a thermally expandable member which is arranged on each of the wall surfaces on the indoor and outdoor sides of the first opening groove and has one widthwise edge located at the bottom of the first opening groove.

Description

[Technical Field]

[0001] The present invention relates to a fitting in which a surface material is supported by a frame body in a snap-on manner. [Background technology]

[0002] Windows in buildings such as buildings and residences include fixtures in which glass is supported by a frame. Patent Document 1 discloses a fixed window fixture in which the upper and lower edges of the glass are positioned flush with the opening grooves of the upper and lower frames. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-45071 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned fixtures have a large groove depth in the opening groove of the upper frame, ensuring space for the kendon. Therefore, when making this type of fixture fireproof, the issue is how to ensure fire resistance in the large space above the glass for the kendon. In other words, the fireproof structure used in this area needs to ensure sufficient fire resistance without interfering with the kendon operation.

[0005] The present invention has been made in consideration of the above-mentioned problems of the conventional technology, and aims to provide a fixture that can ensure both fire resistance and space for a kendon. [Means for solving the problem]

[0006] A fitting according to one embodiment of the present invention is a fitting comprising a frame body having an upper frame with a first opening groove and a lower frame with a second opening groove, and a surface material whose upper and lower edges are supported by a butt-type mechanism relative to the first opening groove and the second opening groove, wherein the upper frame is formed so that the groove depth of the first opening groove is deeper than the groove depth of the second opening groove, has a hollow portion on the outer periphery of the bottom of the first opening groove, and is equipped with a thermally expandable member which is arranged on each of the wall surfaces on the indoor and outdoor sides of the first opening groove, and has one widthwise edge located at the bottom of the first opening groove. [Effects of the Invention]

[0007] According to the above aspect of the present invention, both fire prevention performance and space for a kendon can be ensured. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a vertical cross-sectional view of the fitting according to the embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the fitting shown in FIG. 1. [Figure 3] A vertical cross-sectional view showing the operation of attaching a panel to the upper and lower frames using a snap-on method. DETAILED DESCRIPTION OF THE INVENTION

[0009] BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the fittings according to the present invention will be described in detail below with reference to the accompanying drawings.

[0010] 1 and 2, the fitting 10 of this embodiment comprises a frame 12 fixed to an opening in a building skeleton, and a face material 14 supported on the inside of the frame 12. The fitting 10 is a fixed window in which the face material 14 is supported by the frame 12 so that it cannot be opened or closed, and is a fire window equipped with a fire prevention structure described below. The fitting 10 is installed on the exterior wall of a building such as a building or a house.

[0011] The frame body 12 is formed by framing an upper frame 12a, a lower frame 12b, and left and right vertical frames 12c, 12d on all four sides, forming a rectangular opening on the inside.

[0012] In this application, the "visible direction" refers to the indoor-outdoor direction of the fitting 10, i.e., the direction from the indoor side to the outdoor side or the opposite direction (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, and in the case of a vertical frame 12c or the like that is long in the vertical direction, it refers to the left-right direction perpendicular to the longitudinal direction (the direction indicated by arrow X in the figure), and in the case of an upper frame 12a or the like that is long in the horizontal direction, it refers to the up-down direction perpendicular to the longitudinal direction (the direction indicated by arrow Y in the figure). The "visible surface" refers to a surface along the visible direction. The "inner peripheral side" refers to the inner portion of the frame body 12, which is a frame-shaped member. The "outer peripheral side" refers to the outer portion of the frame body 12, which is a frame-shaped member. The "frame inward-outward direction" refers to the direction from the inner peripheral side of the frame-shaped member toward the outer peripheral side, or the opposite direction.

[0013] The frame body 12 is a composite window frame structure that combines a metal frame material 18 arranged on the outdoor side with a resin frame material 19 arranged on the indoor side, and has high thermal insulation performance. The metal frame material 18 is an extrusion of a metal material such as an aluminum alloy. The resin frame material 19 is an extrusion of a resin material such as polyvinyl chloride (PVC). The metal frame material 18 includes an upper metal frame 18a, a lower metal frame 18b, and left and right vertical metal frames 18c, 18d. The resin frame material 19 includes an upper resin frame 19a, a lower resin frame 19b, and left and right vertical resin frames 19c, 19d.

[0014] As shown in FIG. 1, the upper frame 12a is configured by connecting a resin upper frame 19a to the indoor side of a metal upper frame 18a. The resin upper frame 19a covers the indoor-side surface of the metal upper frame 18a. Anchor parts 21 are connected to anchor mounting parts 20 formed on the outer peripheral surface of the metal upper frame 18a (see FIG. 3), and the metal upper frame 18a is fixed to the building frame via these anchor parts 21. The anchor mounting part 20 has a pair of mounting pieces 20a, 20b facing each other and is a pocket-shaped groove that opens upward. The resin upper frame 19a is connected to the metal upper frame 18a, for example, by a pair of engagement parts 22a, 22b.

[0015] The metal upper frame 18a has a protruding piece 23 near the center of the inner peripheral visible surface and a spot piece 24 at its exterior end. The protruding piece 23 and spot piece 24 are plate pieces that protrude inward from the visible surface of the metal upper frame 18a. The metal upper frame 18a has an opening groove (first opening groove) 25 that opens to the interior between the protruding piece 23 and the spot piece 24. The resin upper frame 19a covers the interior surface of the protruding piece 23 of the metal upper frame 18a and the surface of the portion that is further inward than this. The exterior end of the resin upper frame 19a engages with the protruding piece 23 at the engaging portion 22a and contains the tip of the protruding piece 23.

[0016] As shown in Figure 1, the lower frame 12b is configured by connecting a resin lower frame 19b to the indoor side of a metal lower frame 18b. The resin lower frame 19b covers the indoor surface of the metal lower frame 18b. Anchor parts 27 are connected to anchor mounting parts 26 formed on the outer peripheral surface of the metal lower frame 18b (see Figure 3), and the metal lower frame 18b is fixed to the building frame via these anchor parts 27. The resin lower frame 19b is connected to the metal lower frame 18b, for example, by a pair of engaging parts 28a, 28b.

[0017] The metal lower frame 18b has a protruding piece 29 near the center of the inner peripheral visible surface and a sight piece 30 at its exterior end. The protruding piece 29 and sight piece 30 are plate pieces that protrude inward from the visible surface of the metal lower frame 18b. The metal lower frame 18b has an opening groove (second opening groove) 31 that opens to the interior side between the protruding piece 29 and the sight piece 30. The resin lower frame 19b covers the interior surface of the protruding piece 29 of the metal lower frame 18b and the portion that is further inward than this. The exterior end of the resin lower frame 19b engages with the protruding piece 29 at the engaging portion 28a and includes the tip of the protruding piece 29.

[0018] As shown in Figure 2, one of the vertical frames 12c has a configuration in which a resin vertical frame 19c is connected to the indoor side of a metal vertical frame 18c. The resin vertical frame 19c covers the indoor-side surface of the metal vertical frame 18c. A predetermined anchor part is connected to an anchor mounting part 32 formed on the outer peripheral surface of the metal vertical frame 18c, and the metal vertical frame 18c is fixed to the building frame via this anchor part. The resin vertical frame 19c is connected to the metal vertical frame 18c, for example, by a pair of engaging parts 34a, 34b.

[0019] A flange 36 is attached to the vertical frame 12c so as to straddle the metal vertical frame 18c and the resin vertical frame 19c. The flange 36 engages with an engaged portion provided near the center of the visible surface on the inner periphery of the metal vertical frame 18c and a claw portion formed on the inner periphery of the resin vertical frame 19c. As a result, the flange 36 is provided so as to stand up on the inner periphery near the center of the visible surface of the vertical frame 12c.

[0020] The metal vertical frame 18c has a spot piece 37 at the outdoor end of the inner peripheral visible surface. The spot piece 37 is a plate piece that protrudes inward from the invisible surface of the metal vertical frame 18c. The metal upper frame 18a has an opening groove 38 that opens to the inner peripheral side between the batten 36 and the spot piece 37. The plastic vertical frame 19c covers the surface of the part of the metal vertical frame 18c that is located inside the batten 36. The outdoor end of the plastic vertical frame 19c engages with the metal vertical frame 18c at an engagement portion 34a that is located in a position hidden on the outer periphery of the batten 36.

[0021] As shown in Figure 2, the other vertical frame 12d can be symmetrical to the first vertical frame 12c. Therefore, the components of the vertical frame 12d are given the same reference numerals as the components of the vertical frame 12c, and detailed descriptions will be omitted. That is, the vertical frame 12d also has a resin vertical frame 19d connected to a metal vertical frame 18d via engagement portions 34a and 34b. The vertical frame 12d also has an anchor mounting portion 32, a sight piece 37, and an opening groove 38, and a batten 36 is attached.

[0022] 1 and 2, the face material 14 is, for example, a double-glazed glass having a pair of glass sheets 14a and 14b facing each other with a spacer 39 sandwiched therebetween. The face material 14 may be a single-layered glass or may have a three- or more-layered structure.

[0023] The upper edge 40 of the face material 14 is inserted into the opening groove 25 of the upper frame 12a and is held between the protruding piece 23 and the sight piece 24. The lower edge 41 of the face material 14 is inserted into the opening groove 31 of the lower frame 12b and is held between the protruding piece 29 and the sight piece 30. The protruding pieces 23, 29 and the sight pieces 24, 30 support the surface of the face material 14 via, for example, a backup material 42a and a sealing material 42b. Reference numeral 43 in FIG. 2 denotes a setting block that supports the lower end surface of the face material 14. The setting blocks 43 are rubber blocks made of, for example, EPDM (ethylene propylene diene rubber) and are arranged at multiple locations along the longitudinal direction of the lower frame 12b.

[0024] The left and right side edges of the face material 14 are inserted into the opening grooves 38 of the vertical frames 12c, 12d and are held between the ridges 36 and the recessed pieces 37. The ridges 36 and the recessed pieces 37 support the surface of the face material 14 via, for example, a backup material 42a and a sealing material 42b. The ridges 36 have a composite structure in which a metal ridge 36a is connected to a resin ridge 36b. The metal ridge 36a is an extruded shape made of a metal material such as an aluminum alloy. The resin ridge 36b is an extruded shape made of a resin material such as polyvinyl chloride (PVC).

[0025] The upper and lower edges 40, 41 of the face material 14 are supported by the upper frame 12a and the lower frame 12b in a snap-on manner, and then the left and right edges are supported by the ledges 36. In this way, the face material 14 is supported by the frame body 12.

[0026] Next, the fireproof structure of the fitting 10 will be described.

[0027] As shown in FIG. 1, the fireproof structure of the upper frame 12a can have a hollow portion 48 and thermally expandable members 50 and 51.

[0028] The hollow portion 48 is provided on the outer periphery of the bottom portion 25a that forms the bottom wall of the opening groove 25. The bottom portion 25a is a plate portion that is provided on the metal upper frame 18a and extends along the indoor-outdoor direction (front-view direction). The hollow portion 48 is provided at a position close to the outdoor end of the bottom portion 25a. As a result, the hollow portion 48 extends from the base end of the sight piece 24 toward the indoor side. The hollow portion 48 improves the heat resistance strength of the base end portion of the sight piece 24 in the event of a fire, etc. The hollow portion 48 in the configuration example shown in Figure 1 is formed by two chambers lined up in the indoor-outdoor direction. The hollow portion 48 may be formed by one chamber, or by three or more chambers.

[0029] The bottom 25a can have a stepped shape with a sloped portion 52 in part. The sloped portion 52 is a portion of the bottom 25a that is gradually sloped upward (towards the outer periphery) from the indoor side to the outdoor side. The anchor mounting portion 20 is arranged to be aligned with the outdoor side of the hollow portion 48. The sloped portion 52 is provided at the boundary between the hollow portion 48 and the mounting piece 20a of the anchor mounting portion 20. The sloped portion 52 increases the depth of the open groove 25 in the area closer to the outdoor side.

[0030] The thermal expansion members 50, 51 are non-flammable or flame-retardant members that expand when heated, such as a thermally expandable graphite-containing foam material (heat-expandable foam material). The thermal expansion members 56-58, 64, 65, which will be described later, can be made of the same or similar material as the thermal expansion members 50, 51. The thermal expansion members 50, 51 extend in a strip shape along the entire length of the upper frame 12a. The dimension of the thermal expansion members 50, 51 in the width direction (short side direction) is, for example, 20 mm. The thermal expansion members 50, 51 can be those that expand at temperatures of 300°C or higher, for example.

[0031] The thermal expansion members 50, 51 are arranged facing each other on the indoor and outdoor sides, sandwiching the inner space of the opening groove 25. The indoor-side thermal expansion member 50 is provided on the indoor-side wall surface 23a of the opening groove 25. The wall surface 23a is the outdoor-side facing surface of the protruding piece 23. The outdoor-side thermal expansion member 51 is provided on the outdoor-side wall surface 24a of the opening groove 25. The wall surface 24a is the indoor-side facing surface of the facing piece 24. The thermal expansion members 50, 51 are arranged with their width direction (short sides) extending from the bottom 25a of the opening groove 25 toward the inner periphery (the surface material 14 side). One widthwise edge of the thermal expansion members 50, 51 is located at the bottom 25a. In other words, one edge of the thermal expansion members 50, 51 abuts the bottom 25a or is adjacent to it via a small gap.

[0032] The upper frame 12a uses the indoor-side end and outdoor-side end of the bottom 25a to form holder portions 54, 55 for holding the thermal expansion members 50, 51 on the wall surfaces 23a, 24a, respectively. The holder portions 54, 55 are each formed of a pair of tiny plate pieces facing each other in the frame interior / exterior direction, and are capable of holding the thermal expansion members 50, 51 in the width direction. The plate pieces on the outer periphery of the holder portions 54, 55 protrude from the bottom 25a. This allows the holder portions 54, 55 to use the bottom 25a for their outer peripheral edges. The indoor-side holder portion 54 is provided on the wall surface 23a and has a pocket shape capable of holding the thermal expansion member 50. The outdoor-side holder portion 55 is provided on the wall surface 24a and has a pocket shape capable of holding the thermal expansion member 51. The holder portions 54, 55 prevent the vertically placed thermal expansion members 50, 51 from peeling off or falling off from the wall surfaces 23a, 24a, thereby allowing the expansion direction of the thermal expansion members 50, 51 to be controlled as designed in the event of a fire or the like.

[0033] 1, the fireproof structure of the lower frame 12b can have thermal expansion members 56, 57, and 58. The thermal expansion members 56 to 58 can be installed or omitted as appropriate depending on the fireproof performance required for the fitting 10.

[0034] The thermal expansion members 56 to 58 extend in a strip shape along the entire length of the lower frame 12b. The dimension in the width direction (short side direction) of the thermal expansion members 56 and 57 is, for example, 10 mm. The dimension in the width direction (short side direction) of the thermal expansion member 58 is, for example, 8 mm. The thermal expansion member 56 can be one that expands at, for example, 300°C or higher. The thermal expansion members 57 and 58 can be one that expands at, for example, 200°C or higher.

[0035] The thermal expansion members 56-58 are arranged to surround the inner space of the opening groove 31 on three sides. The indoor-side thermal expansion member 56 is provided on the indoor-side wall surface 29a of the opening groove 31. The wall surface 29a is the outdoor-side visible surface of the protruding piece 29. The outdoor-side thermal expansion member 58 is provided on the outdoor-side wall surface 30a of the opening groove 31. The wall surface 30a is the indoor-side visible surface of the visible piece 30. The central thermal expansion member 57 is provided on the outer peripheral side surface (outer peripheral visible surface) of the bottom portion 31a that forms the bottom wall of the opening groove 31. The thermal expansion member 57 is located approximately in the visible direction of the bottom portion 31a and is positioned to overlap the setting block 43 vertically. The thermal expansion members 56, 58 are arranged with their width direction (short sides) facing from the bottom portion 31a of the opening groove 31 toward the inner peripheral side (toward the surface material 14). The thermal expansion member 57 is disposed so that its width direction (short side) is aligned with the projection direction of the bottom portion 31a.

[0036] The lower frame 12b is provided with three holder portions 60, 61, and 62. The holder portions 60 and 62 are provided at the indoor end and outdoor end of the bottom portion 31a. The holder portion 61 is provided on the outer peripheral side surface of the bottom portion 31a. The holder portions 60 to 62 are each formed by a pair of tiny plate pieces facing each other, and have a pocket shape that can hold the thermal expansion members 56 to 58 in the width direction.

[0037] 2, the fireproof structure of one of the vertical frames 12c can have thermal expansion members 64, 65. The thermal expansion members 64, 65 can be installed or omitted as appropriate depending on the fireproof performance required for the fitting 10.

[0038] The thermal expansion members 64, 65 extend in a strip shape along the entire length of the vertical frame 12c. The dimension of the thermal expansion members 64, 65 in the width direction (short side direction) is, for example, 10 mm. The thermal expansion members 64, 65 may be those that expand at temperatures of 300°C or higher.

[0039] The thermal expansion members 64, 65 are arranged to surround the inner space of the opening groove 38 from two sides. The thermal expansion member 64 is provided on the outer periphery of the bottom 38a that forms the bottom wall of the opening groove 38. The thermal expansion member 64 is located approximately in the center of the bottom 38a in the projection direction, and is in a position that overlaps with the face material 14 in the X direction. The thermal expansion member 64 is arranged with its width direction (short side) aligned with the projection direction of the bottom 38a. The thermal expansion member 65 is provided on the wall surface 37a on the outdoor side of the opening groove 38. The wall surface 37a is the indoor-side projection surface of the sight piece 37. The thermal expansion member 65 is arranged with its width direction (short side) directed from the bottom 38a of the opening groove 38 toward the inner periphery (toward the face material 14).

[0040] Two holder portions 66, 67 are provided on the vertical frame 12c. The holder portion 66 is provided on the outer peripheral side surface of the bottom portion 38a. The holder portion 67 is provided on the outdoor end portion of the bottom portion 38a. The holder portions 66, 67 are each formed by a pair of tiny plate pieces facing each other, and have a pocket shape that can hold the thermal expansion members 64, 65 in the width direction.

[0041] 2, the fire protection structure of the other vertical frame 12c can be symmetrical to the fire protection structure of one vertical frame 12c. That is, the fire protection structure of the vertical frame 12d can also have thermal expansion members 64, 65.

[0042] Next, a method of attaching the face plate 14 to the frame body 12 using a snap-on method will be described.

[0043] The fitting 10 is constructed by attaching the frame 12 to the building framework prior to the installation of the face plate 14. As described above, the frame 12 can be attached to the building framework using the top, bottom, left, and right anchor mounting portions 20, 26, and 32. The batten 36 is attached after the face plate 14 is fastened.

[0044] As shown in FIG. 3, the face plate 14 is supported by the upper and lower edges 40, 41 of the face plate 14 in a snap-fit ​​manner on the upper frame 12a and the lower frame 12b. FIG. 3 is a vertical cross-sectional view illustrating the movement path of the face plate 14 during the snap-fit ​​operation. The "face plate 14D" shown by a solid line in FIG. 3 indicates the state in which the face plate 14 is supported by the upper frame 12a and the lower frame 12b in a snap-fit ​​manner, i.e., the state in which the installation work of the face plate 14 is completed. The "face plates 14A to 14C" shown by a two-dot chain line in FIG. 3 indicate the movement path when the face plate 14 is attached to the upper frame 12a and the lower frame 12b in a snap-fit ​​manner. The face plate 14 is moved in the order of the position of "face plate 14A," the position of "face plate 14B," and the position of "face plate 14C," and is finally installed at the position of face plate 14D.

[0045] During the push-button operation, when the upper edge 40 is inserted into the opening groove 25 of the upper frame 12a, it moves significantly toward the rear (vertical direction) within the opening groove 25, tracing a movement trajectory that moves from the exterior side to the interior side of the room. Therefore, the opening groove 25 of the upper frame 12a must be deep enough to allow the upper edge 40 to be inserted as far up (rear) as possible. Meanwhile, the opening groove 31 of the lower frame 12b only needs to be deep enough to accommodate the face panel 14, once inserted all the way into the opening groove 25, by moving it downward and inserting it. Therefore, as shown in FIG. 1 , the groove depth (depth D1) of the opening groove 25 of the upper frame 12a is deeper than the groove depth (depth D2) of the opening groove 31 of the lower frame 12b. The inclined portion 52 on the bottom 25a of the opening groove 25 increases the depth of the exterior side of the opening groove 25, creating a space to more reliably avoid interference between the upper edge 40 and the bottom 25a.

[0046] Next, the effects of the fitting 10 of this embodiment will be described.

[0047] As described above, the fitting 10 of this embodiment is configured so that the upper and lower edges 40, 41 of the face material 14 are supported in a snap-in manner by the opening grooves 25, 31 of the upper frame 12a and lower frame 12b. For this reason, the depth D1 of the opening groove 25 is deeper than the depth D2 of the opening groove 31. The upper frame 12a has a hollow portion 48 on the outer periphery of the bottom 25a of the opening groove 25. The fitting 10 further comprises thermally expandable members 50, 51 that are arranged on the indoor and outdoor wall surfaces 23a, 24a of the opening groove 25, respectively, and have one edge in the width direction located at the bottom 25a.

[0048] In this way, by providing the hollow portion 48 on the outer periphery of the bottom 25a of the opening groove 25 in the fitting 10, the insulating properties of the opening groove 25 and its surrounding area are improved in the event of a fire, etc., and heat resistance is improved. As a result, the fitting 10 can prevent the facing piece 24 from softening in the event of a fire, etc., and the tip side of the facing piece 24 from warping and deforming so as to open toward the outside of the room, and can prevent the face material 14 from falling off to the outside of the room.

[0049] The fitting 10 is provided with thermally expandable members 50, 51 on the indoor and outdoor wall surfaces 23a, 24a of the opening groove 25. This allows the thermally expandable members 50, 51 to expand toward the interior or exterior of the opening groove 25, respectively, in the event of a fire or other incident, thereby reliably filling the interior space of the opening groove 25. This further prevents the face plate 14 from falling off, and also prevents the opening groove 25 from becoming a hole through which flames and smoke can pass from the interior to the exterior. In particular, the thermally expandable members are installed horizontally on the indoor and outdoor wall surfaces 23a, 24a of the opening groove 25. Therefore, even if the setting block 43 melts and the face plate 14 drops in the event of a fire or other incident, the fitting 10 can keep the opening groove 25 filled with the thermally expandable members 50, 51, further preventing the upper edge 40a of the face plate 14 from falling off. In other words, the fitting 10 does not need to use a fire-resistant metal setting block 43, and has the advantage of being able to ensure sufficient fire resistance even if low-cost rubber parts are used.

[0050] The thermal expansion members 56-58, 64, 65 of the other frames 12b-12d also function in the same way in the event of a fire, etc. That is, the frames 12b-12d also prevent the face material 14 from falling off, and each opening groove 31, 38 is prevented from becoming a through hole for flames and smoke to pass inside and outside the room.

[0051] In this embodiment, the thermal expansion members 50, 51 are arranged on the wall surfaces 23a, 24a of the opening groove 25 so that one edge in the width direction is located at the bottom 25a. Therefore, the surface (lower surface) of the bottom 25a is barely covered by the thermal expansion members 50, 51, leaving almost the entire surface exposed. In other words, the depth D of the opening groove 25 is not reduced by the thermal expansion members 50, 51 on the upper frame 12a. Therefore, the thermal expansion members 50, 51 do not encroach on the space for the stomp in the opening groove 25 and do not interfere with the stomp operation. Note that the movement distance of the upper edge 40 of the panel 14 during the stomp operation is smaller in the indoor / outdoor direction than in the frame interior / exterior direction. Therefore, the thermal expansion members 50, 51 cover the indoor and exterior wall surfaces 23a, 24a of the opening groove 25 but do not interfere with the stomp operation (see Figure 3).

[0052] The thermal expansion members 50, 51 are positioned so that they abut against the bottom 25a. This allows the thermal expansion members 50, 51 to fill the inner space of the opening groove 25 more tightly in the event of a fire, etc. The thermal expansion members 50, 51 also expand along the bottom 25a. As a result, the expanded thermal expansion members 50, 51 insulate the bottom 25a on the inner periphery of the hollow portion 48. This further improves the insulating properties of the opening groove 25 and its surrounding area of ​​the building fixture 10, and further suppresses deformation of the opening of the sight piece 24 in the event of a fire, etc. In other words, by arranging the thermal expansion members 50, 51 so that they abut against the bottom 25a on the inner periphery of the hollow portion 48, the fire resistance of the upper frame 12a is further improved.

[0053] The upper frame 12a does not have a thermal expansion member arranged along the projection direction of the bottom 25a of the opening groove 25. Furthermore, no metal fittings (metal fittings to prevent the surface material from falling off) for holding the upper edge 40 of the surface material 14 are provided inside the opening groove 25 of the upper frame 12a. As a result, the building material 10 can more reliably secure space for the kendon in the upper frame 12a while ensuring sufficient fire resistance.

[0054] The fitting 10 can further include thermal expansion members 56-58 around the opening groove 31 of the bottom frame 12b. In this embodiment, the thermal expansion members 56-58 of the bottom frame 12b are smaller in width than the thermal expansion members 50, 51 of the top frame 12a. In other words, the thermal expansion members 50, 51 of the top frame 12a are wider than the thermal expansion members 56-58 of the bottom frame 12b. That is, the opening groove 25 of the top frame 12a is deeper than the opening groove 31 of the bottom frame 12b to ensure space for the kendon. Therefore, by using wide thermal expansion members 50, 51 to match the deep opening groove 25, the inner space of the opening groove 25 can be more reliably filled. On the other hand, by using narrow thermal expansion members 56-58, sufficient fire resistance can be ensured while preventing an impact on the visible width (width in the frame inward and outward directions) of the bottom frame 12b.

[0055] In this embodiment, of the thermal expansion members 56-58 of the lower frame 12b, the thermal expansion members 57, 58 provided on the outdoor-side wall surface 30a of the opening groove 31 and on the outer peripheral side surface of the bottom 31a can have the property of expanding at a lower temperature than the thermal expansion members 50, 51 of the upper frame 12a. This makes it possible to align the expansion timing of the thermal expansion members 50, 51 of the upper frame 12a, which become hot in the event of a fire, and the thermal expansion members 57, 58 of the lower frame 12b, which are less likely to increase in temperature, thereby improving the fire resistance of the entire building material 10.

[0056] In the building fixture 10, the upper frame 12a has anchor mounting portions 20 on its outer peripheral surface for mounting anchor components 21 to the building frame. The anchor components 21 must have a sufficient width in the indoor / outdoor direction to ensure a certain level of strength, and the anchor mounting portions 20 also accommodate this. Therefore, the anchor mounting portions 20 extend in the indoor / outdoor direction to a position where they partially overlap the opening groove 25 in the vertical direction. Therefore, the upper frame 12a of this embodiment has a hollow portion 48 located near the outdoor end of the bottom 25a of the opening groove 25, and the anchor mounting portions 20 are positioned indoors relative to the hollow portion 48. This allows the upper frame 12a to install the hollow portion 48 by utilizing the excess space formed on the outdoor side of the anchor mounting portions 20 in the vertical direction. Therefore, even though the upper frame 12a has the hollow portion 48, its visible width (width in the indoor / outdoor direction) is not excessively enlarged, thereby preventing a deterioration in appearance quality.

[0057] Since the hollow portion 48 only needs to provide the desired thermal insulation effect, it does not need to have a large visible width like the anchor mounting portion 20. Therefore, in this embodiment, an inclined portion 52 is provided midway through the opening groove 25, and the depth of the area of ​​the visible width of the bottom portion 25a that overlaps vertically with the hollow portion 48 is increased. This makes it possible to simultaneously improve the thermal insulation performance of the upper frame 12a by providing the hollow portion 48 and increase the space for the kendon by increasing the groove depth, while suppressing an increase in its visible width.

[0058] As described above, one aspect of the present invention provides a fitting comprising a frame body having an upper frame with a first opening groove and a lower frame with a second opening groove, and a facing member whose upper and lower edges are supported by a buckle against the first opening groove and the second opening groove. The upper frame has a groove depth of the first opening groove deeper than the groove depth of the second opening groove, a hollow portion on the outer periphery of the bottom of the first opening groove, and thermal expansion members disposed on both the indoor and outdoor wall surfaces of the first opening groove, with one edge in the width direction located at the bottom of the first opening groove. According to this configuration, the upper frame has a groove depth of the first opening groove greater than the second opening groove of the lower frame to ensure space for the buckle. The hollow portion is located on the outer periphery of the first opening groove, improving the heat resistance of the surrounding material around the first opening groove and enhancing fire resistance. The thermal expansion member is attached to the indoor and outdoor wall surfaces of the first opening groove, and one edge in the width direction is located at the bottom of the first opening groove. This means that the thermal expansion member does not obstruct the space for the kendon. The thermal expansion member also reliably fills the inner space of the first opening groove, ensuring fire prevention performance.

[0059] The thermal expansion member arranged along the projection direction of the bottom of the first opening groove may not be provided, which allows for a more reliable space for the kendon in the upper frame while maintaining sufficient fire resistance.

[0060] The upper frame may be configured so that holders for holding the thermal expansion member are formed on the indoor-side and outdoor-side wall surfaces by using the indoor-side and outdoor-side ends of the bottom of the first opening groove, respectively. In this way, peeling or falling off of the thermal expansion member placed vertically on the indoor and outdoor wall surfaces of the opening groove can be suppressed.

[0061] The first opening groove may not have a metal fitting for holding the upper edge of the face material, which can more reliably secure space for the kendon at the upper frame while maintaining sufficient fire resistance.

[0062] The lower frame has second thermal expansion members disposed on both the indoor and outdoor wall surfaces of the second opening groove, and the thermal expansion members have a width dimension larger than that of the second thermal expansion member. This allows the first opening groove, which has a larger groove depth, to be reliably filled with a wider thermal expansion member. On the other hand, the second opening groove, which has a smaller groove depth, is surrounded by a narrower thermal expansion member, thereby ensuring sufficient fire resistance while preventing an effect on the visible width of the lower frame (the width inside and outside the frame).

[0063] The lower frame may be configured such that a second thermally expandable member is disposed on at least one of the exterior-side wall surface of the second opening groove and the outer peripheral side surface of the bottom of the second opening groove, and the second thermally expandable member has the property of expanding at a lower temperature than the first thermally expandable member. In this way, the expansion timing of the thermally expandable member of the upper frame, which becomes hot in the event of a fire, and the second thermally expandable member of the lower frame, which is less likely to increase in temperature, can be synchronized, thereby improving the fire resistance of the entire building material.

[0064] The upper frame and the lower frame may be configured to include a metal frame material and a resin frame material connected to the interior side of the metal frame material, thereby improving the thermal insulation performance of the building material.

[0065] The upper frame may have an anchor mounting portion provided on the outer periphery of the bottom of the first opening groove and adapted to receive an anchor part for fixing the upper frame to the building frame, the hollow portion being provided near the outer end of the bottom of the first opening groove, and the anchor mounting portion being positioned on the inner side of the hollow portion. In this way, the hollow portion can be installed using the excess space located on the outer side of the anchor mounting portion, thereby preventing an increase in the actual visible width of the upper frame.

[0066] The bottom of the first open groove may have an inclined portion that gradually inclines outward from the indoor side toward the outdoor side, and the hollow portion may be located on the outdoor side of the inclined portion. In this case, the difference in the visible dimension between the hollow portion and the anchor mounting portion, which can have a smaller visible dimension than the anchor mounting portion, can be utilized to further increase the groove depth of the open groove.

[0067] It should be noted that the present invention is not limited to the above-described embodiment, and can be freely modified without departing from the spirit of the present invention. [Explanation of symbols]

[0068] 10 fittings, 12 frame body, 12a upper frame, 12b lower frame, 12c, 12d vertical frame, 14, 14A to 14D surface material, 23a, 24a, 29a, 30a, 37a wall surface, 25, 31, 38 opening groove, 25a, 31a, 38a bottom portion, 48 hollow portion, 50, 51, 56 to 58, 64, 65 thermal expansion member, 54, 55, 60 to 62, 66, 67 holder portion

Claims

1. A fitting comprising a frame body having an upper frame provided with a first opening groove and a lower frame provided with a second opening groove, and a face material whose upper and lower edges are supported by a buckling mechanism relative to the first opening groove and the second opening groove, The upper frame has a groove depth of the first opening groove that is deeper than a groove depth of the second opening groove, and has a hollow portion on an outer circumferential side of a bottom portion of the first opening groove, a thermal expansion member disposed on each of the wall surfaces on the indoor side and the outdoor side of the first open groove, and one edge portion in the width direction of the thermal expansion member being located at the bottom of the first open groove; A fixture characterized by:

2. The fitting according to claim 1, No thermal expansion member is provided along the projection direction of the bottom of the first opening groove. A fixture characterized by:

3. The fitting according to claim 1 or 2, The upper frame forms a holder portion for holding the thermal expansion member on each of the wall surfaces on the indoor side and the outdoor side by using the indoor side end and the outdoor side end of the bottom of the first open groove, respectively. A fixture characterized by:

4. The fitting according to claim 1 or 2, No metal fitting for holding the upper edge of the face material is provided in the first open groove. A fixture characterized by:

5. The fitting according to claim 1, The lower frame has second thermal expansion members disposed on the indoor and outdoor wall surfaces of the second opening groove, The thermal expansion member has a width dimension larger than that of the second thermal expansion member. A fixture characterized by:

6. The fitting according to claim 1, The lower frame has a second thermal expansion member disposed on at least one of an outdoor-side wall surface of the second opening groove and an outer peripheral side surface of a bottom portion of the second opening groove, The second thermal expansion member has a property of expanding at a lower temperature than the first thermal expansion member. A fixture characterized by:

7. The fitting according to claim 1, The upper frame and the lower frame each include a metal frame material and a resin frame material connected to the interior side of the metal frame material. A fixture characterized by:

8. The fitting according to claim 1, The upper frame has an anchor mounting portion provided on the outer circumferential side of the bottom of the first opening groove, to which an anchor part for fixing the upper frame to a building skeleton is attached, The hollow portion is provided at a position close to the outdoor end of the bottom of the first open groove, The anchor attachment portion is disposed on the indoor side of the hollow portion. A fixture characterized by:

9. The fitting according to claim 8, The bottom of the first open groove has an inclined portion that gradually inclines toward the outer periphery from the indoor side toward the outdoor side, The hollow portion is located on the outdoor side of the inclined portion. A fixture characterized by:

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