JP7544648B2 - Fittings - Google Patents

Description

The present invention relates to building materials that take fire resistance into consideration.

Some fixtures are designed to increase fire resistance by arranging a thermal expansion member in correspondence with the notch in the frame (see, for example, Patent Document 1).

JP 2014-198959 A

However, if a thermal expansion member is placed directly on the outer surface of the frame, there is a concern that the appearance quality of the fixture may be compromised. In the case of a frame with a hollow section, the above problem can be solved by placing a thermal expansion member in the hollow section. However, in order to place a thermal expansion member in the hollow section of the frame, it is necessary to do so from the small end of the frame, which not only makes the work complicated, but can also make it difficult to place the thermal expansion member in the desired position.

In view of the above situation, the present invention aims to provide fittings that can improve fire resistance without compromising the appearance quality or making the work complicated.

To achieve the above objective, the fitting of the present invention is a fitting that restricts the opening movement of a screen relative to a frame by locking and unlocking a locking member, and is characterized in that the screen is provided with an interlocking member that interlocks with the locking and unlocking operation of the locking member, and a thermal expansion member is disposed on the interlocking member so as to be positioned corresponding to a cutout portion provided on the screen when the locking member is in a locked state.

According to the present invention, a thermal expansion member is arranged on the interlocking member provided on the shoji screen. This allows the thermal expansion member to be easily arranged at a desired position in the hollow portion of the frame, and also allows the thermal expansion member to be arranged on the outer surface of the frame in a position that is difficult to see from the outside. This makes it possible to improve the fire resistance of the fixture without compromising the appearance quality or complicating the work.

FIG. 1 is a vertical cross-sectional view of a fixture according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the fixture shown in FIG. 1 . This shows a frame to be applied to the shoji screen of the fitting shown in Figure 1, where (a) is a cross-sectional view and (b) is a view from the outside of the room. 2 shows a frame to be applied to the shoji screen of the fitting shown in FIG. 1, where (a) is an external perspective view, (b) is a perspective view of the interlocking member disposed inside the frame shown in (a) in an unlocked state, and (c) is a perspective view of the interlocking member disposed inside the frame shown in (a) in a locked state. This shows the relationship between the cutout portion of the frame and the interlocking member applied to the shoji screen of the fitting shown in Figure 1 from the outside of the room, where (a) is a diagram of the unlocked state and (b) is a diagram of the locked state. FIG. 4 is a vertical cross-sectional view of a fitting according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view of the fitting shown in FIG. 6 . FIG. 7 is a view of the shoji door of the fitting shown in FIG. 6 as seen from the door end side. 7A and 7B show the relationship between the cutout portion of the frame and the interlocking member applied to the shoji door of the fitting shown in Figure 6, viewed from the door end, where (a) is a diagram of the unlocked state and (b) is a diagram of the locked state.

Below, a preferred embodiment of the fittings according to the present invention will be described in detail with reference to the attached drawings. For convenience, the terms "prospect direction" and "finding direction" will be used below. The prospect direction is the direction along the depth of the fittings, as shown by arrow A in the figure. A surface along the prospect direction may be referred to as a "prospect surface." The prospect direction is the direction along the top and bottom perpendicular to the prospect direction in the case of an object that extends horizontally, such as a bottom frame. In the case of an object that extends vertically, such as a vertical frame, the horizontal direction perpendicular to the prospect direction is called the "finding direction." A surface along the prospect direction may be called a "finding surface."

(Embodiment 1)
1 and 2 show a fitting according to the first embodiment of the present invention. The fitting illustrated here is called a sliding window, which includes a frame 10, an outer screen 20 disposed on the outside of the frame 10, and an inner screen 30 disposed on the inside of the frame 10. The frame 10 is configured in a rectangular shape by providing an upper frame 13 and a lower frame 14 between the upper and lower ends of the left and right vertical frames 11 and 12. The outer screen 20 is configured by providing vertical frames 22 and 23 on both left and right edges of a rectangular double-glazed glass 21, and attaching an upper frame 24 and a lower frame 25 to the parts between the vertical frames 22 and 23 at both upper and lower edges of the double-glazed glass 21. Similarly, the inner screen 30 is configured by providing vertical frames 32, 33 on both the left and right edges of the double-glazed glass 31 having a rectangular shape, and attaching an upper frame 34 and a lower frame 35 to the portion between the vertical frames 32, 33 at both the top and bottom edges of the double-glazed glass 31. In this embodiment 1, the outer screen 20 and the inner screen 30 are arranged movably along the longitudinal direction of the upper frame 13 and the lower frame 14 relative to the frame body 10, and when the outer screen 20 is arranged on the left side of the frame body 10 as viewed from the inside of the room, and the inner screen 30 is arranged on the right side, it is possible to close the opening of the frame body 10. When the opening of the frame body 10 is closed, the vertical frame 23 arranged on the right side of the outer screen 20 as viewed from the inside of the room and the vertical frame 33 arranged on the left side of the inner screen 30 are aligned in the forward direction. The vertical frames 11, 12, upper frame 13, and lower frame 14 constituting the frame body 10, and the vertical frames 22, 23, 32, 33, upper frames 24, 34, and lower frames 25, 35 constituting the shoji screens 20, 30 are extruded shapes formed from metals such as aluminum alloys, and are configured to have a cross-sectional shape that is almost uniform over the entire length along the longitudinal direction. In the following, for convenience, the components of the outer shoji screen 20 may be given the term "outside" and the components of the inner shoji screen 30 may be given the term "inside" to distinguish between the two. In addition, the left and right of the components of the frame body 10, the components of the outer shoji screen 20, and the components of the inner shoji screen 30 will be specified as viewed from the inside of the room according to Figure 2.

The upper frame 13 of the frame body 10 has upper frame rail portions 13a at the portions corresponding to the outer upper frame 24 and the inner upper frame 34, and the lower frame 14 has lower frame rail portions 14a at the portions corresponding to the outer lower frame 25 and the inner lower frame 35. The upper frame rail portions 13a and the lower frame rail portions 14a are each thin plates extending in the viewing direction, and are formed in portions that extend along the longitudinal direction of the upper frame 13 and the lower frame 14 to almost the entire length.

The left and right vertical frames 11, 12 have vertical frame rails 11b, 12b on the inner peripheral surfaces facing each other at the thin plate-like vertical frame bases 11a, 12a extending along the projection direction, and abutment walls 11c, 12c are provided on the parts that are closer to the interior side than the vertical frame rails 11b, 12b. The vertical frame 11 located on the left side as viewed from the interior side has the vertical frame rails 11b and abutment walls 11c only at the parts of the vertical frame base 11a that correspond to the outer vertical frame 22. The vertical frame 12 located on the right side as viewed from the interior side has the vertical frame rails 12b and abutment walls 12c only at the parts of the vertical frame base 12a that correspond to the inner vertical frame 32. These vertical frame rails 11b, 12b and abutment walls 11c, 12c are each thin plates extending in the viewing direction and are formed along the longitudinal length of the vertical frames 11, 12. Sealing members 11d, 12d are provided on the extending edges of the abutment walls 11c, 12c on the exterior side.

The outer vertical frames 22, 23, outer upper frame 24, and outer lower frame 25 of the outer sash 20 each have a glass accommodation groove 21a on their inner periphery that accommodates the edge of the double-glazed glass 21. The left outer vertical frame (hereinafter referred to as the outer door end frame 22 when distinguishing between them) and the outer upper frame 24, which form the door end, each have two guide walls 22a, 24a, and a door roller 26 is disposed on the outer lower frame 25. The guide wall 22a of the outer door end frame 22 extends from the edge located on the outside of the room and the part located on the inside of the room at the left end of the outer vertical frame base 22b, which is an irregular cylindrical shape, toward the left side so as to be approximately parallel to each other. Between the guide walls 22a, there is a pull member 27 that engages with the vertical frame rail 11b to pull the outer screen 20 toward the interior of the frame 10. The guide walls 24a of the outer upper frame 24 extend upward from the outer edge and the inner edge of the rectangular cylindrical outer upper frame base 24b so as to be almost parallel to each other. The upper edges of the guide walls 24a are each provided with a seal member 24c. Although not shown in the figure, the door rollers 26 are rotatably arranged inside the outer lower frame 25 via an axle that extends along the projection direction, and are provided at multiple locations along the length of the outer lower frame 25 with their lower peripheral surfaces exposed to the outside.

The outer screen 20 configured as described above can move along the extension direction of the upper frame 13 and lower frame 14 by placing the upper frame rail portion 13a between the two guide wall portions 24a of the outer upper frame 24 and placing the door roller 26 on the upper edge of the lower frame rail portion 14a so that it can roll. When the outer screen 20 is placed in the closed position, the vertical frame rail portion 11b provided on the left vertical frame 11 will enter between the two guide wall portions 22a provided on the outer door end frame 22.

The inner vertical frames 32, 33, inner upper frame 34, and inner lower frame 35 of the inner sash 30 each have a glass accommodation groove 31a on their inner periphery that accommodates the edge of the double-glazed glass 31. The right inner vertical frame (hereinafter referred to as the inner door end frame 32 when distinguishing between them) and the inner upper frame 34, which form the door end, each have two guide walls 32a, 34a, and the inner lower frame 35 is equipped with a door roller 36. The guide wall 32a of the inner door end frame 32 extends from the edge located on the outside of the room and the part located on the inside of the room at the right end of the inner vertical frame base 32b, which forms an irregular cylindrical shape, toward the right, so as to be approximately parallel to each other. Between the guide walls 32a, there is a pull member 37 that engages with the vertical frame rail 12b to pull the inner screen 30 toward the interior of the frame 10. The guide walls 34a of the inner upper frame 34 extend upward from the outer edge and the inner edge of the rectangular cylindrical inner upper frame base 34b so as to be almost parallel to each other. A seal member 34c is provided on the upper edge of each guide wall 34a. Although not shown in the figure, the door rollers 36 are rotatably arranged inside the inner lower frame 35 via axles that extend along the projection direction, and are provided at multiple points along the longitudinal direction of the inner lower frame 35 with their lower peripheral surfaces exposed to the outside.

In addition, the inner vertical frame (hereinafter referred to as the inner frame 33 when distinguishing between them) that forms the joint of the inner screen 30 has a hollow portion 33a and an air hole (notch) 33b. As shown in FIG. 3, the hollow portion 33a is formed between the outer wall portion 33c on the outside of the room, the inner wall portion 33d on the inside of the room, and the left and right side walls 33e, 33f, and is a void that extends along the length of the inner frame 33. The inner frame 33 of this embodiment 1 is provided with a partition wall portion 33g to divide the inside of the hollow portion 33a into the inside and outside. The air hole 33b connects the inside of the hollow portion 33a to the outside, and is formed in two places, one in the upper part and one in the lower part of the outer wall portion 33c. In the illustrated example, the ventilation hole 33b is formed by a long hole-shaped notch along the length of the inner joint frame 33. Although not shown in the figure, the side wall portion 33f located on the inner periphery of the inner joint frame 33 has a communication hole (not shown) at an appropriate position that connects the inside of the hollow portion 33a to the glass storage groove 31a.

The inner screen 30 constructed as described above can move along the extension direction of the upper frame 13 and lower frame 14 on the interior side of the outer screen 20 by placing the upper frame rail portion 13a between the two guide wall portions 34a of the inner upper frame 34 and placing the door roller 36 on the upper edge of the lower frame rail portion 14a so that it can roll. When the inner screen 30 is placed in the closed position, the vertical frame rail portion 12b provided on the right vertical frame 12 will enter between the two guide wall portions 32a provided on the inner door end frame 32.

In the fittings of this embodiment 1, smoke deflectors 23h, 33h are provided between the outer vertical frame (hereinafter referred to as the outer frame 23 when distinguishing between them) that forms the locking frame of the outer screen 20 and the inner frame 33, and a crescent (locking member) 41 and a crescent receiver (locking member) 42 are also provided.

The smoke deflector 23h on the outer meeting frame 23 protrudes from the edge located on the outer periphery toward the room, then bends at a right angle toward the door end. The smoke deflector 33h on the inner meeting frame 33 protrudes from the visible surface facing the outside toward the room, then bends at a right angle toward the door end. When the opening of the frame 10 is closed, these smoke deflectors 23h, 33h are inserted between the vertical frames 23, 33, and function to limit the movement of the smoke deflectors in the direction away from each other along the projection direction. Even in this state, the outer screen 20 and the inner screen 30 can be moved in the opening direction.

When the crescent 41 and the crescent receiver 42 are engaged with each other, they are in a locked state and function to prevent the outer screen 20 and the inner screen 30 from moving in the opening direction. The crescent 41 is supported by the crescent body 41b in a state in which it rotates around the crescent axis 41a, and is attached to the visible surface of the inner meeting frame 33 via the crescent body 41b. When the crescent 41 is rotated in the locking direction with the opening of the frame body 10 closed, the crescent 41 engages with the crescent receiver 42. When the crescent 41 is rotated in the unlocking direction, the engagement between the crescent 41 and the crescent receiver 42 is released, and the outer screen 20 and the inner screen 30 can be moved in the opening direction.

As shown in FIG. 4, the crescent 41 is linked to an upper interlocking member 52 and a lower interlocking member 53 via an intermediate operating member 51. The intermediate operating member 51 converts the rotation of the crescent shaft 41a accompanying the locking/unlocking operation of the crescent 41 into vertical linear movement along the length of the inner meeting frame 33, and is disposed in the hollow portion 33a of the inner meeting frame 33. The upper interlocking member 52 extends upward from the upper end of the intermediate operating member 51, and the lower interlocking member 53 extends downward from the lower end of the intermediate operating member 51. These interlocking members 52, 53 are located in close proximity to the intermediate operating member 51 when the crescent 41 is in the unlocked state, and are linked to the intermediate operating member 51 so that when the crescent 41 is rotated in the locking direction, each of them moves forward toward the end of the inner meeting frame 33. When these upper interlocking members 52 and lower interlocking members 53 move forward, they come into contact with the upper frame rail portion 13a of the upper frame 13, and also come into contact with the lower frame rail portion 14a of the lower frame 14, thereby moving the inner screen 30 toward the interior of the room relative to the frame body 10, and maintaining a state in which the inner screen 30 and the frame body 10 are pressed against each other.

The interlocking members 52, 53 are configured to include metal parts 52a, 53a made of metal that are connected to the intermediate operating member 51, and resin parts 52b, 53b made of resin that are in contact with the frame body 10. The metal parts 52a, 53a of the interlocking members 52, 53 are set in length so as to include the height position corresponding to the above-mentioned ventilation hole 33b of the inner fitting frame 33 when the crescent 41 is in either the locked or unlocked state, and the surface located on the outer periphery is arranged so as to follow the opening edge of the ventilation hole 33b. A thermal expansion member 60 is arranged on a part of the surface located on the outer periphery of the metal parts 52a, 53a. The thermal expansion member 60 is a non-combustible or flame-retardant fire-resistant member that expands due to heat, and for example, a thermally expandable graphite-containing foam material can be used. In this embodiment 1, as shown in FIG. 5(a), when the crescent 41 is in the unlocked state, the thermal expansion member 60 is disposed in a position closer to the intermediate operating member 51 than the vent hole 33b, while as shown in FIG. 5(b), when the crescent 41 is in the locked state, the thermal expansion member 60 is disposed in a position corresponding to the entire length of the vent hole 33b.

In the fittings constructed as described above, when the crescent 41 is locked with the outer screen 20 and the inner screen 30 in the closed position, the movement of the outer screen 20 and the inner screen 30 is restricted, and the inner screen 30 is pressed against the frame body 10 by the interlocking members 52 and 53. Therefore, in this state, the frame body 10 and the inner screen 30 are in close contact with each other, making it possible to improve watertightness and soundproofing. At this time, the frame body 10 is in contact with the inner screen 30 via the resin parts 52b and 53b of the interlocking members 52 and 53, so there is no risk of damage to the frame body 10. In addition, the glass storage groove 31a of the inner screen 30 is in communication with the outside through the ventilation hole 33b, hollow portion 33a, and communication hole (not shown) of the inner meeting frame 33. This makes it possible to prevent water from entering due to the pressure difference between the outside of the room and the glass storage groove 31a.

Furthermore, in this state, as described above, the thermal expansion member 60 disposed on the metal parts 52a, 53a of the interlocking members 52, 53 is disposed in correspondence with the ventilation hole 33b formed in the inner joint frame 33. Therefore, even if the fittings are exposed to high temperatures due to a fire or the like and the resin parts 52b, 53b melt or burn, the ventilation hole 33b is reliably blocked by the expansion of the thermal expansion member 60. In other words, when the thermal expansion member 60 expands, there is no risk that the path to the glass storage groove 31a through the ventilation hole 33b, hollow part 33a, and communication hole (not shown) of the inner joint frame 33 described above becomes a flame propagation path. As a result, even if flammable gas is generated in the hollow part 33a due to the melting or burning of the resin parts 52b, 53b, there is no risk of the fire spreading to the outside, such as the non-heated surface side.

In the above-mentioned embodiment 1, the interlocking members 52, 53 that are interlocked with the locking/unlocking operation of the crescent 41 are arranged in the hollow portion 33a of the frame 33, but the present invention is not necessarily limited to this, and the same effect can be achieved even if the interlocking members are arranged outside the frame, as in embodiment 2 described below.

(Embodiment 2)
6 and 7 show a fitting according to a second embodiment of the present invention. The fitting shown here is a so-called vertical sliding window, which includes a frame 110 and a screen 120, and which opens so as to protrude to the outside of the room by rotating the screen 120 around a vertical axis relative to the frame 110. The frame 110 is configured in a rectangular shape by providing an upper frame 113 and a lower frame 114 between the upper and lower ends of the left and right vertical frames 111 and 112. The screen 120 is configured by providing vertical frames 122 and 123 on both the left and right edges of a rectangular glass 121, and attaching an upper frame 124 and a lower frame 125 to the portions between the vertical frames 122 and 123 at both the upper and lower edges of the glass 121. The vertical frames 111, 112, upper frame 113, and lower frame 114 that constitute the frame body 110, and the vertical frames 122, 123, upper frame 124, and lower frame 125 that constitute the shoji screen 120 are extruded shapes made of metal such as aluminum alloy, and are configured to have a cross-sectional shape that is almost uniform over the entire length along the longitudinal direction. For the sake of convenience, in the following, the components of the shoji screen 120 and the left and right sides of the components of the shoji screen 120 will be identified as viewed from the inside of the room in accordance with Figure 7.

The left and right vertical frames 111, 112, the upper frame 113, and the lower frame 114 that make up the frame body 110 are configured with abutment walls 111b, 112b, 113b, and 114b at the interior edge of the frame bases 111a, 112a, 113a, and 114a that extend in the forward direction. The abutment walls 111b, 112b, 113b, and 114b are thin plates that extend toward the inner periphery, and sealing members 111c, 112c, 113c, and 114c are provided on the extended edges that face the outside of the room.

The vertical frames 122, 123, upper frame 124, and lower frame 125 of the shoji screen 120 are each configured with a frame base 122a, 123a, 124a, 125a that is a hollow square tube, and a glass storage groove 121a on the outdoor side of the frame base 122a, 123a, 124a, 125a. Although not shown in the figure, in this embodiment 2, an opening and closing mechanism 130 is provided between the frame base 124a of the upper frame 124 and the upper frame 113, and between the frame base of the lower frame 125 and the lower frame 114, and the operation of these upper and lower opening and closing mechanisms 130 causes the shoji screen 120 to open and close relative to the frame body 110 around the vertical axis.

The glass storage groove 121a of the shoji screen 120 has inner visible wall portions 122b, 123b, 124b, 125b extending from the edges located on the outside of the room of the frame base portions 122a, 123a, 124a, 125a toward the outer periphery, projected wall portions 122c, 123c, 124c, 125c extending in the projected direction toward the outside from the inner visible wall portions 122b, 123b, 124b, 125b, and outer visible wall portions 122d, 123d, 124d, 125d extending toward the inner periphery from the projected wall portions 122c, 123c, 124c, 125c. In the upper frame 124, the inner sight wall 124b, the recessed wall 124c, and the outer sight wall 124d are all molded integrally with the frame base 124a. In the vertical frames 122, 123 and the lower frame 125, the inner sight walls 122b, 123b, 125b and the recessed walls 122c, 123c, 125c are molded integrally with the frame bases 122a, 123a, 125a, while the outer sight walls 122d, 123d, 125d are molded separately from the frame bases 122a, 123a, 125a as push edges.

Guide parts 122e, 123e, 125e are integrally provided on the vertical frames 122, 123 and bottom frame 125 at the portion located on the outer periphery side of the frame bases 122a, 123a, 125a. The guide parts 122e, 123e, 125e extend from both side edges of the frame bases 122a, 123a, 125a toward the outer periphery and then bend in a direction approaching each other. A metal interlocking member 140 is provided on the guide parts 122e, 125e in the portion extending from the vertical frame located on the left side as viewed from the inside of the room (hereinafter, referred to as the door end frame 122 when distinguishing between them) to the bottom frame 125. The interlocking member 140 is arranged to be movable along the length of the door end frame 122 and the bottom frame 125, using the guide parts 122e and 125e as guides, and is connected to each other by a flexible corner drive 141, as shown in FIG. 8.

As shown in Figures 6 and 7, the interlocking member 140 disposed on the door end frame 122 is provided with a linking pin 142 and a lock pin (locking member) 143. The linking pin 142 passes through the frame base 122a via a pin insertion hole (cutout portion) 142a provided in the frame base 122a of the door end frame 122, and is connected to an operating handle (locking member) 150 provided on the projected surface on the inner periphery of the frame base 122a. The operating handle 150 is attached to the door end frame 122 via a handle body 151, and can be rotated around a handle shaft 150a that runs along the left and right sides of the handle body 151. The above-mentioned link pin 142 is linked to the operating handle 150 so that, as shown in Figures 8 and 9(a), when the operating handle 150 is in a substantially horizontal position facing the room, it is located at the upper end of the pin insertion hole 142a of the door end frame 122, and when it is rotated downward by approximately 90 degrees from this position, it is located at the lower end of the pin insertion hole 142a, as shown in Figure 9(b). In other words, in this fixture, when the operating handle 150 is in a substantially horizontal position facing the room, the link member 140 is located above the door end frame 122, and by rotating the operating handle 150 downward from this position, the link member 140 moves downward relative to the door end frame 122.

As shown in FIG. 7, the lock pin 143 is provided so as to protrude from the surface of the interlocking member 140 facing the vertical frame 111 toward the vertical frame 111. Although not shown in the figure, this lock pin 143 is located above the pin receiving member (locking member) 160 provided on the vertical frame 111 when the operating handle 150 is in a substantially horizontal position facing the room, and moves downward to engage with the pin receiving member 160 when the operating handle 150 is rotated 90 degrees. When the lock pin 143 is engaged with the pin receiving member 160, the movement of the shoji 120 toward the outside of the room relative to the frame body 110 is prevented. When the lock pin 143 is located above the pin receiving member 160, it is possible to move the door end frame 122 toward the outside of the room relative to the frame body 110.

A thermal expansion member 170 is also provided on a portion of the surface of the interlocking member 140 that faces the door frame 122. In this embodiment 2, as shown in FIG. 9(a), when the operating handle 150 is in a substantially horizontal position facing the room, the thermal expansion member 170 is disposed above the pin insertion hole 142a, while as shown in FIG. 9(b), when the operating handle 150 is rotated downward by approximately 90°, the thermal expansion member 170 is disposed on the interlocking member 140 so that it is disposed at a position corresponding to the entire length of the pin insertion hole 142a.

In the fittings configured as described above, when the shoji 120 is placed in the closed position and the operating handle 150 is placed facing downward, the lock pin 143 engages with the pin receiving member 160, restricting the movement of the shoji 120 (locked state). In this state, as described above, the thermal expansion member 170 arranged on the interlocking member 140 is arranged corresponding to the pin insertion hole 142a formed in the door end frame 122. Therefore, if the fittings are exposed to high temperatures due to the outbreak of a fire, etc., the pin insertion hole 142a is blocked by the expansion of the thermal expansion member 170, and there is no risk of the pin insertion hole 142a becoming a flame propagation path, which is advantageous in terms of fire resistance.

In the above-described embodiment, the thermal expansion members 60, 170 are arranged at a height position corresponding to the holes 33b, 142a in the screen when the locking member is in the locked state, but the cutout portion does not necessarily have to be a hole, and the thermal expansion member may be arranged so as to be positioned corresponding to a portion with relatively weak fire resistance, such as a thin-walled portion.

As described above, the fittings of the present invention are fittings that limit the opening movement of a screen relative to a frame by locking and unlocking the locking member, and are characterized in that the screen is provided with an interlocking member that interlocks with the locking and unlocking operation of the locking member, and that a thermally expandable member is arranged on the interlocking member so as to be positioned in correspondence with the cutout portion provided in the screen when the locking member is in the locked state.
According to this invention, a thermal expansion member is arranged on the interlocking member provided on the shoji screen. Therefore, the thermal expansion member can be easily arranged at a desired position in the hollow part of the frame, and can be arranged on the outer surface of the frame in a position that is difficult to see from the outside. Therefore, it is possible to improve the fire resistance of the fixture without impairing the appearance quality or making the work complicated. The thermal expansion member does not necessarily have to be arranged partially at a position corresponding to the cutout portion, but may be arranged along the entire length of the frame.

The present invention is also characterized in that, in the above-mentioned fittings, the frame of the shoji screen has a hollow portion surrounded by walls, and a cutout portion is provided in a portion of the wall in the form of a through hole so as to connect the hollow portion with the outside, the interlocking member is arranged movably along the length in the hollow portion of the frame, and the heat-expandable member is partially arranged in the interlocking member at a position corresponding to the cutout portion when the locking member is in the locked state.
According to this invention, the thermal expansion member is disposed at a position corresponding to the cutout only when the locking member is in the locked state, and even when the locking member is unlocked and the screen is in the open position, there is no risk of the thermal expansion member being visible from the outside through the cutout. Moreover, since the thermal expansion member is disposed partially in correspondence with the cutout, it is possible to reduce costs while ensuring fire resistance.

Furthermore, in the above-mentioned building fixture, the present invention is characterized in that the interlocking member moves forward from both ends of the frame so as to abut against the frame body when the locking member is in the locked state, and has a resin part formed of resin and a metal part formed of metal, and the thermally expandable member is arranged in the metal part.
According to this invention, a heat-expandable member is arranged in the metal part of the interlocking member, so that even if the building fixture is exposed to high temperatures, the heat-expandable member expands to reliably seal the cut-out portion, eliminating the risk of fire spreading to the outside.

The present invention is also characterized in that, in the above-mentioned fittings, the frame of the shoji screen has a hollow portion surrounded by walls, and a cutout portion is provided in a portion of the wall in the form of a through hole so as to connect the hollow portion with the outside, the interlocking member is arranged on the outer surface of the frame at a position facing the frame body so as to be movable along the longitudinal direction, and the interlocking member has the thermally expandable member partially arranged at a position corresponding to the cutout portion when the interlocking member is in the locked state.
According to this invention, since the thermal expansion member is disposed partially in correspondence with the cutout portion, it is possible to reduce costs while ensuring fire resistance.

10, 110 Frame body, 30 Inner screen, 33 Inner joint frame, 33a Hollow section, 33c Outer wall section, 33d Inner wall section 33d, 33e, 33f Side wall section 33e, 41 Crescent, 42 Crescent holder, 52 Upper interlocking member, 53 Lower interlocking member, 52a, 53a Metal part, 52b, 53b Resin part, 60, 170 Thermal expansion member, 120 Screen, 140 Interlocking member, 143 Lock pin, 150 Operating handle, 160 Pin holder

Claims (4)

A fitting that restricts the opening movement of a door relative to a frame by locking and unlocking a locking member,
The door is provided with an interlocking member that operates in conjunction with the locking/unlocking operation of the locking member,
A fixture characterized in that a thermal expansion member is arranged on the interlocking member so as to be positioned corresponding to a cutout portion provided in the shoji screen when the locking member is in a locked state. The frame of the shoji screen has a hollow portion surrounded by a wall portion, and the cutout portion is provided in a through hole shape in a part of the wall portion so as to communicate the hollow portion with the outside,
The interlocking member is disposed in the hollow portion of the frame so as to be movable along the longitudinal direction,
The fixture according to claim 1, characterized in that the interlocking member has the thermal expansion member partially disposed at a position corresponding to the notch portion when the locking member is in the locked state. The fitting according to claim 2, characterized in that the interlocking member moves forward from both ends of the frame to abut against the frame when the locking member is in the locked state, has a resin part made of resin and a metal part made of metal, and the thermal expansion member is disposed in the metal part. The frame of the shoji screen has a hollow portion surrounded by a wall portion, and the cutout portion is provided in a through hole shape in a part of the wall portion so as to communicate the hollow portion with the outside,
The interlocking member is disposed on the outer surface of the frame so as to be movable along the longitudinal direction at a position facing the frame body,
The fixture according to claim 1, characterized in that the interlocking member has the thermal expansion member partially disposed at a position that corresponds to the notch portion when the interlocking member is in the locked state.

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