JP7640344B2 - Fittings - Google Patents

Description

Applicable under Article 30, Paragraph 2 of the Patent Act. Date of sale: January 6, 2021. Place of sale: Okuda Construction Co., Ltd. 415 Nayacho, Shimogyo-ku, Kyoto City, Kyoto Prefecture. Date of sale: January 6, 2021. Place of sale: Zenitaka Corporation 1-7-3 Awaza, Nishi-ku, Osaka City, Osaka Prefecture. Date of sale: January 27, 2021, March 24, 2021. Place of sale: Uchino Construction Co., Ltd. 1-21 Kamezawa, Sumida-ku, Tokyo. Date of sale: January 28, 2021, February 9, 2021, February 17, 2021. Place of sale: Takamatsu Construction Co., Ltd. 2-1-1 Shinchiba, Chuo-ku, Chiba City, Chiba Prefecture. Date of sale: February 1, 2021, February 10, 2021, February 25, 2021, March 11, 2021. Place of sale: Nakayama Construction Co., Ltd. 1-16-35 Takadanobaba, Shinjuku-ku, Tokyo Date of sale: February 15, 2021 Location of sale: Hinaya Construction Co., Ltd. 2-1-3 Kinpo-cho, Gifu City, Gifu Prefecture Date of sale: February 17, 2021 Location of sale: Sanko Sangyo Co., Ltd. 20 Saeki Shimotoge, Hieta-cho, Kameoka City, Kyoto Prefecture Date of sale: February 19, 2021 Location of sale: Takamatsu Construction Co., Ltd. 3-20-3 Nakakasai, Edogawa-ku, Tokyo Date of sale: March 1, 2021 Location of sale: Takamatsu Techno Service Co., Ltd. 4-22-15 Taishido, Setagaya-ku, Tokyo Date of sale: March 2, 2021 Location of sale: Shinozaki Construction Co., Ltd. 1-5-2 Mita, Meguro-ku, Tokyo Date of sale: March 4, 2021 Location of sale: Crust Co., Ltd. 1-183 Miyahara-cho, Kita-ku, Saitama City, Saitama Prefecture Date of sale: March 5, 2021 Sold at Hayashi Construction Co., Ltd. 5-16-1 Minamitsukaguchicho, Amagasaki City, Hyogo Prefecture Sold on March 11, 2021 Sold at IXSIM Communications Co., Ltd. 3-14-15 Higashinakano, Nakano Ward, Tokyo Sold on March 26, 2021 Sold at Soubi Kenchiku Kikaku Co., Ltd. 140 Shojocho, Ogawa-dori Sanjo Sagaru, Nakagyo Ward, Kyoto City, Kyoto Prefecture

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

Some fixtures have frames and stiles made of aluminum alloy, and are equipped with steel reinforcing materials inside a hollow space to prevent fires. This type of fixture has the advantage that the linear expansion coefficient of the steel reinforcing materials is smaller than that of frames and stiles made of aluminum alloy, so that the steel reinforcing materials can maintain the shape of the fixture even if the frames and stiles melt due to high temperatures.

In addition, in fittings that take fire prevention into consideration, double-glazed screens, which are made up of glass with different fire resistance strengths, are often used as the facing material for the shoji screens. For example, a combination of wire glass and float glass is a common double-glazed screen. With this fitting, even if the fitting is heated to a temperature state where float glass would thermally crack, the wire glass with its high fire resistance strength remains in the shoji screen, preventing a situation in which a flame path is created inside or outside the room (see, for example, Patent Document 1).

JP 2014-109091 A

In fittings in which steel reinforcement is arranged inside a frame or stile made of aluminum alloy, when the frame or stile is heated to a temperature before it melts, the frame or stile may deform out of the plane even if the thermal deformation of the frame or stile is limited by the reinforcement. For this reason, even if the temperature is such that high fire-resistant glass softens and loses its self-supporting property, if the vertical stile that joins the frame deforms significantly out of the plane, there is a concern that the glass may fall off, which is not necessarily desirable from the perspective of fire prevention. In particular, in fittings that have an inner and outer stile, there are two vertical stiles that join the frame that may deform for the above-mentioned reasons, and the situation is different depending on whether the high fire-resistant glass is located on the outside or inside the room, making it difficult to prevent a decrease in fire prevention caused by the glass falling off.

In view of the above-mentioned circumstances, the present invention aims to provide a fitting that can prevent a situation in which fire resistance is reduced due to the falling off of glass with high fire resistance.

In order to achieve the above-mentioned objective, the fitting of the present invention comprises a first shoji screen on the inside of the room in the projection direction of the frame body, and a second shoji screen on the outside of the room, the first shoji screen and the second shoji screen are fittings constructed by attaching frames to the four periphery of the surface material, the first shoji screen has a vertical frame that forms the door end fixed to the vertical frame of the frame body, a thermal expansion member is arranged between the vertical frame and the vertical frame, the surface material of the first shoji screen is a double-glazed glass in which multiple pieces of glass with different fire resistance strengths are arranged opposite each other, the vertical frame that meets in the first shoji screen has a hollow portion, and the frames that constitute the first shoji screen and the second shoji screen have a reinforcing material molded from a material with a smaller linear expansion coefficient than the vertical frame arranged only in the hollow portion of the vertical frame that meets in the first shoji screen.

According to this invention, the reinforcing material is provided only in the hollow portion of the vertical frame where the first shoji screen meets, making it easier to control the deformation that occurs in the vertical frame of the first shoji screen compared to when reinforcing material is also provided in the vertical frame of the second shoji screen. For example, by suppressing the deformation that occurs in the vertical frame of the first shoji screen, it is possible to prevent the highly fire-resistant glass from falling off, and more reliably prevent a decrease in fire resistance.

FIG. 1 is a view of a fitting according to an embodiment of the present invention as seen from the inside of a room. FIG. 2 is a vertical cross-sectional view of the fitting shown in FIG. 1 . FIG. 2 is a cross-sectional view of the fixture shown in FIG. 1 . This shows the upper frame of an inner sash used in the fitting shown in Figure 1, where (a) is an end view and (a) is a view from the inside of the room. This shows the vertical frame of the inner sash to be applied to the fitting shown in Figure 1, where (a) is an end view and (a) is a view from the glass receiving groove side. This shows the vertical frame that will be the fitting of the inner sash used in the fitting shown in Figure 1, where (a) is an end view, (b) is a view from the glass receiving groove side, and (c) is an enlarged view of (a). 2 is a table showing the state change of the fitting shown in FIG. 1 when it is heated from the outside of the room, together with a comparative example, as a cross section of a main part. 2 is a diagram showing the state change of the fitting shown in FIG. 1 when it is heated from inside the room, together with a comparative example, as a cross section of a main part.

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."

Figures 1 to 3 show a fitting that is an embodiment of the present invention. The fitting illustrated here comprises a frame body 10, an inner screen 20 arranged on the inside of the frame body 10, and an outer screen 30 arranged on the outside of the frame body 10. The frame body 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, 12. The inner screen 20 is configured by providing vertical frames 22, 23 on both the left and right edges of a rectangular panel 21, and attaching an upper frame 24 and a lower frame 25 to the parts between the vertical frames 22, 23 at the upper and lower edges of the panel 21. Similarly, the outer shoji screen 30 is constructed by providing vertical frames 32, 33 on both the left and right edges of the rectangular panel 31, and attaching upper and lower frames 34, 35 to the areas between the vertical frames 32, 33 on both the top and bottom edges of the panel 31. The vertical frames 11, 12, upper frame 13, and lower frame 14 that make up the frame body 10, and the vertical frames 22, 23, 32, 33, upper frames 24, 34, and lower frames 25, 35 that make up the shoji screens 20, 30 are extruded shapes formed from metals such as aluminum alloys, and are constructed to have a cross-sectional shape that is almost uniform along the entire length along the longitudinal direction.

The face material 21 of the inner screen 20 and the face material 31 of the outer screen 30 are double-glazed windows in which wire-reinforced glass 21b, 31b and float glass 21c, 31c are joined facing each other via spacer members 21a, 31a, respectively. In this embodiment, the wire-reinforced glass 21b, 31b, which has a relatively high fire resistance, is arranged on the outside of the room, and the float glass 21c, 31c, which has a relatively low fire resistance, is arranged on the inside of the room, and each screen 20, 30 is configured in this state. The inner screen 20 is provided with a face material 21 that is larger in length and width than the face material 31 of the outer screen 30. As shown in FIG. 1, in this embodiment, the inner screen 20 is configured as a fixed window on the right side of the frame 10 when viewed from the inside of the room. The outer screen 30 is arranged to be movable along the longitudinal direction of the upper frame 13 and lower frame 14 relative to the frame body 10, and when it is arranged on the left side of the frame body 10 as viewed from inside the room, it is possible to close the opening of the frame body 10 together with the inner screen 20. When the outer screen 30 is closed, the vertical frame 33 arranged on the right side of the outer screen 30 as viewed from inside the room and the vertical frame 22 arranged on the left side of the inner screen 20 are arranged side by side along the front direction. Smoke deflectors 22a and 33a are provided between these vertical frames 22 and 33, respectively, as well as a crescent 22b and a crescent receiver 33b.

The smoke deflector 33a provided on the vertical frame 33 of the outer screen 30 protrudes toward the room and then bends at a right angle toward the door end. The smoke deflector 22a provided on the vertical frame 22 of the inner screen 20 protrudes toward the outside from the visible surface facing the outside and then bends at a right angle toward the door end. When the outer screen 30 is closed, the smoke deflectors 22a, 33a are inserted between the vertical frames 22, 33, and function to restrict movement of the smoke deflectors in the direction away from each other along the front direction. Even in this state, it is possible to move the outer screen 30 in the opening direction relative to the inner screen 20.

When the crescent 22b is locked while the outer screen 30 is closed, the crescent 22b and the crescent receiver 33b engage with each other, locking the vertical frame 33 of the outer screen 30 and the vertical frame 22 of the inner screen 20, thereby preventing the outer screen 30 from moving in the opening direction. In the following, in order to distinguish between the components of the outer screen 30 and the components of the inner screen 20, the components of the outer screen 30 may be referred to as "outside" and the components of the inner screen 20 as "inside". For convenience, the components of the outer screen 30 and the components of the inner screen 20 will be identified as left and right when viewed from the inside of the room according to Figure 1.

The frame body 10 of this embodiment is configured so that it can be used in common with sliding windows. The upper frame 13 of the frame body 10 has upper frame rail parts 13a and 13b at the parts corresponding to the inner upper frame 24 and the outer upper frame 34, respectively, and the lower frame 14 has lower frame rail parts 14a and 14b at the parts corresponding to the inner lower frame 25 and the outer lower frame 35, respectively. The upper frame rail parts 13a and 13b and the lower frame rail parts 14a and 14b are flat plates extending in the direction of sight, and are formed in parts that are almost the entire length along the longitudinal direction of the upper frame 13 and the lower frame 14. In this embodiment, the upper frame rail part 13a on the indoor side and the upper frame rail part 13b on the outdoor side are provided at almost the same height position. In contrast, in the lower frame 14, the lower frame rail part 14a on the indoor side is configured to be higher than the lower frame rail part 14b on the outdoor side.

The left and right vertical frames 11, 12 have vertical frame rail sections 11b, 12b on the inner peripheral surfaces facing each other at the flat vertical frame bases 11a, 12a that extend along the front direction. The vertical frame 12 located on the right side as viewed from the inside of the room has the vertical frame rail section 12b only at the part of the vertical frame base 12a that corresponds to the inner vertical frame 23. The vertical frame 11 located on the left side as viewed from the inside of the room has the vertical frame rail section 11b only at the part of the vertical frame base 11a that corresponds to the outer vertical frame 32. These vertical frame rail sections 11b, 12b are flat and extend in the front direction, and are formed in parts that are almost the entire length of the vertical frames 11, 12.

The outer sash 30 has two guide walls 34a, 32a on the outer top frame 34 and the left outer vertical frame 32 that forms the door end, and is equipped with a door roller 36 on the outer bottom frame 35. The guide wall 34a of the outer top frame 34 extends upward from the edge located on the outside of the room and the edge located on the inside of the room of the outer top frame base 34b, which is a square tube, so as to be approximately parallel to each other. The upper edge of the guide wall 34a is provided with a seal member 37. The guide wall 32a of the outer vertical frame 32 extends toward the left side 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 32b, which is an irregular tube, so as to be approximately parallel to each other. Between the guide wall portions 32a, a pull member 38 is disposed, which engages with the vertical frame rail portion 11b to pull the outer screen 30 toward the interior of the room relative to the frame body 10. Although not shown in the figure, the door rollers 36 are disposed rotatably inside the outer bottom frame 35 via axles that extend along the projection direction, and are provided at multiple points along the length of the outer bottom frame 35 with their lower peripheral surfaces exposed to the outside.

The outer vertical frame 33 on the right side, which is the fitting of the outer screen 30, has a hollow outer vertical frame base (hollow portion) 33c. A partition wall portion 33d is formed in the outer vertical frame base portion 33c so as to divide the hollow interior in the forward direction. The partition wall portion 33d is provided in the panel 31 at a position halfway between the wire glass 31b and the float glass 31c.

As is clear from Figures 2 and 3, the left and right outer vertical frames 32, 33, the outer upper frame 34, and the outer lower frame 35 of the outer screen 30 all have a glass accommodation groove 31d integrally formed on the inner periphery, and the edge of the panel 31 is accommodated inside each glass accommodation groove 31d.

The outer screen 30 constructed as described above can move along the extension direction of the upper frame 13 and the lower frame 14 by placing the upper frame rail portion 13b between the two guide wall portions 34a of the outer upper frame 34 and placing the door roller 36 on the upper edge of the lower frame rail portion 14b so that it can roll. When the outer screen 30 is closed, the vertical frame rail portion 11b on the left vertical frame 11 enters between the two guide wall portions 32a on the left outer vertical frame 32, and the left outer vertical frame 32 is drawn toward the inside of the room. Furthermore, when the crescent 22b is operated from this state to engage with the crescent receiver 33b, the right outer vertical frame 33 is drawn toward the inner vertical frame 22 located on the left side of the inner screen 20 described later.

In this state, the seal member 14c on the lower frame 14 abuts against the visible surface of the outer lower frame 35 facing the room, and the seal member 11c on the left vertical frame 11 abuts against the guide wall portion 32a located on the room side of the outer vertical frame 32, ensuring watertightness between them. In addition, between the outer upper frame 34 and the upper frame 13, the seal members 37 on the two guide wall portions 34a of the outer upper frame 34 abut against both side surfaces of the upper frame rail portion 13b, ensuring watertightness between them. Furthermore, the seal member 22c on the left inner vertical frame 22 abuts against the right outer vertical frame 33, ensuring watertightness between them.

The inner shoji screen 20 has two guide walls 25a, 24a, 23a on each of the inner bottom frame 25, the inner top frame 24, and the inner vertical frame 23 on the right side that forms the door edge. The guide wall 25a of the inner bottom frame 25 extends downwards, approximately parallel to each other, from the edge located on the outside of the room and the part located on the inside of the room at the lower end of the inner bottom frame base 25b, which is a square tube.

The guide wall 24a of the inner upper frame 24 extends upward from the edge located on the outside of the room and the part located on the inside of the room at the upper end of the inner upper frame base 24b, which is a flat plate along the projection direction, so as to be approximately parallel to each other. Sealing members 26 are arranged on the upper edges of the guide wall 24a, which face each other. As is clear from the figure, the guide wall 24a provided on the outside of the room is provided with a connecting piece 24c. The connecting piece 24c extends upward from the upper edge of the guide wall 24a and has a bent portion 24d at the upper edge. The bent portion 24d extends in the projection direction toward the outside of the room and is formed to a size that allows it to be arranged between the upper frame rail portions 13a and 13b. In this embodiment, as shown in FIG. 4, an escape space 24X is provided in the part of the inner upper frame 24 that corresponds to the inner vertical frame 22 on the left side, and a connecting piece 24c is provided only in the part to the right of the escape space 24X. In addition, a non-fixing space 24Y is provided in the left part of the connecting piece 24c, and a bent portion 24d is provided only in the part to the right of the non-fixing space 24Y. Furthermore, a door-end side escape space 24Z is provided in the part of the inner upper frame 24 that corresponds to the inner vertical frame 23 on the right side, and a connecting piece 24c and a bent portion 24d are provided only in the part to the left of the door-end side escape space 24Z.

As shown in Figures 3 and 5, the guide wall 23a of the inner vertical frame 23 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 23b, which is a flat plate along the front direction, toward the right side so that they are almost parallel to each other. The guide wall 23a on the outside of the room is flat and its dimension along the front direction is set to be larger than the vertical frame rail part 12b on the right vertical frame 12. The guide wall 23a on the indoor side is flat and has almost the same dimensions as the guide wall 23a on the outside of the room, and has a bent part 23c on the extended edge. The bent part 23c is bent at an almost right angle toward the room. In addition, a sealing abutment wall part 23d is provided on the right inner vertical frame 23 at a part that is further inside the room than the guide wall part 23a on the indoor side.

The left inner vertical frame 22, which is the fitting of the inner screen 20, has a hollow inner vertical frame base (hollow portion) 22d. A partition wall portion 22e is formed in the inner vertical frame base portion 22d so as to divide the hollow interior in the forward direction. The partition wall portion 22e is provided in the face material 21 at a position halfway between the wire glass 21b and the float glass 21c.

Reinforcing material 27 is provided on this inner vertical frame 22 only in the hollow interior portion that is on the outside of the partition wall portion 22e, i.e., the portion of the panel 21 that corresponds to the wire-reinforced glass 21b with high fire resistance. The reinforcing material 27 is made of a material with a smaller linear expansion coefficient than the aluminum alloy that is the material of the inner vertical frame 22, such as steel, and is configured to have a roughly U-shaped cross section. As shown in FIG. 6, it is provided over almost the entire length of the inner vertical frame 22. The reinforcing material 27 and the inner vertical frame 22 are fixed together by screwing in screw members S0 at multiple points along the length with appropriate intervals between them.

As shown in Figures 3 and 6, the inner screen 20 has a glass storage groove 21d formed integrally only on the inner circumference of the left inner vertical frame 22, and a surface material support bracket 28 is disposed inside the glass storage groove 21d. The surface material support bracket 28 has an L-shaped cross section with a mounting plate portion 28a and a support plate portion 28b, and is fixed with screw members S via the mounting plate portion 28a at multiple points, including the portion that is approximately the center in the vertical direction of the inner vertical frame 22.

The inner vertical frame 22 is provided with thermal expansion members 50 at the portion facing the outer vertical frame 33 and at the portions that form both side edges inside the glass storage groove 21d. The thermal expansion members 50 are non-combustible or flame-retardant fire-resistant members that expand due to heat. For example, a thermally expandable graphite-containing foam material can be used as this type of thermal expansion member 50. In this embodiment, a long thermal expansion member 50 with a cross-sectional shape that is thin relative to the width dimension is used, and is continuously disposed over almost the entire length of the glass storage groove 21d along its longitudinal direction.

On the other hand, the inner vertical frame 23, inner upper frame 24, and inner lower frame 25 on the right side of the inner screen 20 all have glass support pieces 21e only on the indoor side, and a bezel mounting portion 21f on the outdoor side. In other words, in the inner screen 20, the edge of the panel 21 is accommodated in the glass accommodation groove 21d provided in the left inner vertical frame 22 from the outdoor side, and then the panel 21 is abutted against the glass support pieces 21e of the right inner vertical frame 23, inner upper frame 24, and inner lower frame 25, and a bezel 21g is attached to each bezel mounting portion 21f, thereby supporting the panel 21.

As shown in Figure 5, the inner vertical frame 23 on the right side, which forms the door end, has air inlet holes 23e to equalize the pressure inside the glass storage groove 21d with the outside air. The air inlet holes 23e of the inner vertical frame 23 are elongated holes that run vertically, and are formed at the upper and lower ends of the inner vertical frame 23.

To fix the inner screen 20 configured as above to the frame body 10, first remove the surface material 21 and place the inner screen 20 inside the frame body 10, and place it on the upper surface of the connecting bracket 40 previously attached to the lower frame 14. That is, place the upper frame rail portion 13a between the two guide wall portions 24a of the inner upper frame 24, and place the vertical frame rail portion 12b between the two guide wall portions 23a of the inner vertical frame 23, and then place the lower frame 14 on the connecting bracket 40, so that the inner screen 20 is placed inside the frame body 10. At this time, the inner vertical frame 23 is placed in a state in which the extended edges of the two guide wall portions 23a are in contact with the expected surfaces that will be the inner periphery of the vertical frame 12. The connecting bracket 40 can be, for example, a bracket base 40a that extends vertically and has mounting plate portions 40b bent at right angles at both the top and bottom ends. One of the mounting plate portions 40b can be attached to the lower frame 14 in advance, with the other mounting plate portion 40b protruding above the lower frame rail portion 14a.

From this state, if the screw member S1 is screwed into the connecting bracket 40 via the lower frame 14, the inner lower frame 25 can be fixed to the lower frame 14 via the connecting bracket 40. Also, if the screw member S2 is screwed into the bent portion 23c of the inner vertical frame 23 via the vertical frame 12, the inner vertical frame 23 can be fixed to the vertical frame 12, and if the screw member S3 is screwed into the upper frame 13 via the bent portion 24d of the inner upper frame 24, the inner upper frame 24 can be fixed to the upper frame 13. After the inner lower frame 25, the inner vertical frame 23, and the inner upper frame 24 are each fixed to the frame body 10, the surface material 21 can be supported by the above-mentioned method. A wind stopper plate (not shown) provided on the upper frame 13 is placed in the escape space 24X provided in the inner screen 20.

In the inner screen 20 fixed to the frame body 10 as described above, the seal member 14d provided on the lower frame 14 abuts against the guide wall portion 25a provided on the interior side of the inner lower frame 25, and the seal member 12c provided on the right-side vertical frame 12 abuts against the sealing abutment wall portion 23d of the inner vertical frame 23, ensuring watertightness between them. In addition, between the inner upper frame 24 and the upper frame 13, the seal members 26 provided on the two guide walls 24a of the inner upper frame 24 abut against both sides of the upper frame rail portion 13a, ensuring watertightness between them. Furthermore, as described above, the seal member 22c provided on the left inner vertical frame 22 abuts against the outer vertical frame 33 located on the right side of the outer screen 30, ensuring watertightness between them.

Furthermore, in order to improve the fire resistance of the inner sash 20, thermal expansion members 50A, 50B, 50C are also arranged on the inner upper frame 24 and the right inner vertical frame 23. Like those provided on the inner vertical frame 22, the thermal expansion members 50A, 50B, 50C are non-combustible or flame-retardant fire-resistant members that expand due to heat, and for example, a thermally expandable graphite-containing foam material can be used. In this embodiment, elongated thermal expansion members 50A, 50B, 50C are used that have a cross-sectional shape with a thin plate thickness relative to the width dimension. In the inner upper frame 24, as shown in FIG. 5, the thermal expansion member 50A is arranged on the surface facing the upper frame rail portion 13a at both ends of the portion extending vertically in the connecting piece 24c, and the thermal expansion member 50B is arranged on the mutually facing inner surfaces of the two guide wall portions 24a in the portion corresponding to the escape space 24X and the door end escape space 24Z. In the inner vertical frame 23, as shown in FIG. 6, the thermal expansion member 50C is provided on both the upper and lower ends of the surface facing the indoor side of the guide wall portion 23a on the outdoor side. As is clear from the figure, the thermal expansion member 50C has a dimension along the vertical direction that is larger than the air introduction hole 23e, and is arranged at a position that includes the entire length of the air introduction hole 23e in the vertical direction. Although not shown in the figure, each thermal expansion member 50A, 50B, 50C is adhered with double-sided tape or adhesive, and will not fall off the inner sash 20 accidentally.

In the case of a fitting constructed as described above, if it is exposed to high temperatures due to a fire or the like, the sealing members 11c, 12c, 14c, 14d, 22c, 26, 37 provided between the outer screen 30 and the frame body 10 and between the inner screen 20 and the frame body 10 will be burned. However, the thermal expansion members 50A, 50B, 50C interposed between the inner screen 20 and the frame body 10 and the thermal expansion member 50 provided on the inner vertical frame 22 will expand, thereby preventing a gap from occurring between the inner screen 20 and the frame body 10 or between the outer vertical frame 33 and the inner vertical frame 22. Furthermore, the inner upper frame 24 and the upper frame 13 are connected to each other by a connecting piece 24c that is continuous in the longitudinal direction and is integral with the inner upper frame 24, and the inner vertical frame 23 and the vertical frame 12 are connected to each other by a guide wall portion 23a that is continuous in the longitudinal direction and is integral with the inner vertical frame 23. Therefore, even if thermal deformation occurs in the upper frame 13 or the inner upper frame 24, or in the vertical frame 12 or the inner vertical frame 23 after the thermal expansion members 50A, 50B, 50C expand, there is no risk of a gap that could become a fire path between them, which is advantageous in terms of fire resistance.

Furthermore, in the above-mentioned fittings, an escape space 24X and an unfixed space 24Y are provided between the inner upper frame 24 and the upper frame 13. Therefore, even if thermal expansion occurs in the inner vertical frame 22 due to the effects of sunlight, etc., or the middle part of the upper frame 13 bends downward due to aging, these deformations are absorbed by the escape space 24X and the unfixed space 24Y. Therefore, during normal use, there is no concern that the inner vertical frame 22 of the inner sash 20 will bend outward. In addition, as described above, the thermal expansion members 50A, 50B of the inner upper frame 24 are arranged in the areas corresponding to the escape space 24X, the non-fixed space 24Y, and the door end escape space 24Z. When thermally expanded, they can reliably block the flame path created by the escape space 24X, the non-fixed space 24Y, and the door end escape space 24Z, eliminating the risk of them becoming a factor in the spread of fire in the event of a fire.

In addition, between the inner vertical frame 23 and the vertical frame 12, the two guide walls 23a abut against the projecting surface of the vertical frame 12 to form a space 60 surrounded on all four sides. Therefore, the thermal expansion member 50C arranged on the inner vertical frame 23 expands inside this limited space 60, and it is possible to more reliably prevent a gap from occurring between the inner vertical frame 23 and the vertical frame 12. In addition, the thermal expansion member 50C provided on the inner vertical frame 23 is provided at a height position that includes the air introduction hole 23e. Therefore, when the fitting is exposed to high temperatures, the communication between the glass storage groove 21d of the inner sash 20 and the outside air through the air introduction hole 23e is blocked by the thermally expanding thermal expansion member 50C. That is, when the thermally expandable member 50C thermally expands, even if it does not directly block the air inlet hole 23e, both ends of the space 60 formed between the inner vertical frame 23 and the vertical frame 12 are blocked by the thermally expanded thermally expandable member 50C, blocking communication between the glass storage groove 21d and the outside air. As a result, even if the spacer member 21a used as the face material 21 melts and flammable gas is generated in the glass storage groove 21d, this gas will not leak to the outside and will not cause a fire.

Here, for example, if a fire breaks out outside and the exterior side of the fitting is exposed to high temperatures, the amount of thermal expansion on the exterior side will be greater than on the interior side. For this reason, as shown as a comparative example in the upper part of Figure 7, if reinforcing materials are not provided on both the exterior vertical frame 33 arranged at the intersection of the exterior screen 30 and the interior vertical frame 22 arranged at the intersection of the interior screen 20, as the temperature of the fitting rises, the exterior vertical frame 33 of the exterior screen 30 and the interior vertical frame 22 of the interior screen 20 will gradually curve to become convex toward the exterior. As a result, when the temperature of the fitting reaches about 600°C, there is a concern that the wire-reinforced glass 31b of the exterior screen 30 and the wire-reinforced glass 21b of the interior screen 20 may fall off the frame, which is not necessarily desirable in terms of fire resistance.

In contrast, in the fitting of the embodiment, the reinforcing material 27 is arranged only on the exterior portion of the inner vertical frame 22 that corresponds to the wire-reinforced glass 21b. Therefore, as shown in the lower part of Figure 7, even if the temperature of the fitting rises, the thermal expansion of the portion of the inner vertical frame 22 located on the exterior side is suppressed by the reinforcing material 27. As a result, in the outer vertical frame 33, which is connected to the inner vertical frame 22 by the crescent 22b and the crescent receiver 33b and whose movement in the direction away from the inner vertical frame 22 is restricted by the smoke deflectors 22a, 33a, since there is no reinforcing material inside, it is pulled toward the inner vertical frame 22, and thermal deformation that would cause it to become convex toward the outside is suppressed. As a result, even when the temperature reaches a high level of around 600°C, the outer vertical frame 33 and the inner vertical frame 22 are kept from thermally deforming to the outside of the room, and there is no risk of the wire-reinforced glass 31b and the wire-reinforced glass 21b falling off the frames, which is advantageous in terms of fire resistance.

Incidentally, in the fittings in which the wire-reinforced glass 31b, 21b with high fire resistance is arranged on the outside of the room in the outer screen 30 and the inner screen 20, if a fire occurs indoors, as shown in FIG. 8, in both the comparative example and the fittings described above, the float glass 31c, 21c with low fire resistance will thermally crack at about 100°C, and the float glass 31c, 21c will fall off the frame at about 400°C. However, the edge of the float glass 31c, 21c arranged in the glass storage groove 31d, 21d will remain held in the frame as it is, so the wire-reinforced glass 31b, 21b will not fall off the frame. In particular, according to the fittings in which the surface material support bracket 28 is provided in the glass storage groove 21d as in the embodiment, the edge of the float glass 21c can be more reliably prevented from falling off the frame, and the above-mentioned action and effect are more pronounced.

In the above embodiment, the reinforcing material 27 is provided only on the part of the inner vertical frame 22 of the inner screen 20 that faces the outside of the room, but the present invention is not limited to this.

In addition, in the above-mentioned embodiment and variants 1 to 3, the fixing structure between the inner screen and the frame body is described in detail, but these configurations are not necessarily required. In particular, in the present invention, the inner screen does not need to be fixed to the frame body, and like the outer screen, it may be arranged so that it can move relative to the frame body. In this case, the outer screen may be fixed to the frame body.

Although the facing material is a laminated glass that is made up of wire glass and float glass, it is not limited to this, as long as it is a combination of glasses with different fire resistance. The reinforcing material does not have to be steel, and can be any material with a smaller linear expansion coefficient than the material of the frame.

Furthermore, in the above-mentioned embodiment, the reinforcing material is arranged in a biased position in the hollow portion of the vertical frame, but this is not necessarily limited to this. For example, regardless of the shape or size of the reinforcing material, it may be connected to the vertical frame by a screw member only at a position corresponding to the glass with high fire resistance, or the plate thickness may be changed so that the center of gravity is located below the glass with high fire resistance.

As described above, the fittings of the present invention comprise a first shoji screen at one edge side in the projection direction of the frame body, and a second shoji screen at the other edge side of the frame body, the first shoji screen and the second shoji screen being fittings constructed by attaching frames to the four periphery of each of the face materials, the face material of the first shoji screen being double-glazed glass in which multiple pieces of glass with different fire resistance strengths are arranged opposite each other, the vertical frames that meet in the first shoji screen have a hollow portion, and the frames that constitute the first shoji screen and the second shoji screen are characterized in that reinforcing material molded from a material with a smaller linear expansion coefficient than the vertical frames is disposed only in the hollow portions of the vertical frames that meet in the first shoji screen.
According to this invention, reinforcing material is provided only in the hollow portion of the vertical frame of the first shoji screen, which is where the screen joins together. This makes it easier to control deformation in the vertical frame of the first shoji screen compared to when reinforcing material is also provided in the vertical frame of the second shoji screen. For example, by suppressing deformation in the vertical frame of the first shoji screen, it is possible to prevent glass, which has high fire resistance, from falling off, and more reliably prevent a decrease in fire resistance.

Furthermore, the present invention is characterized in that in the above-mentioned fitting, the reinforcing material is connected only to the portion of the hollow portion of the vertical frame that corresponds to the glass with high fire resistance.
Furthermore, the present invention is characterized in that, in the above-mentioned building fixture, the reinforcing material is arranged so that the center of gravity is biased toward the part of the hollow portion of the vertical frame that corresponds to the glass with high fire resistance.
Furthermore, the present invention is characterized in that, in the above-mentioned fitting, the vertical frame is provided with a partition wall portion that divides the inside of the hollow portion into an outside room and an inside room, and the reinforcing material is arranged only in the room corresponding to the glass with high fire resistance.
According to these inventions, the deformation of the part of the vertical frame corresponding to the glass, which has high fire resistance, can be suppressed by the reinforcing material, thereby preventing the glass from falling off and improving fire resistance.

10 Frame, 20, 30 Shoji, 21, 31 Surface material, 21b, 31b Wire glass, 21c, 31c Float glass, 22 Inner vertical frame, 22d Inner vertical frame base, 22e, 33d Partition wall, 27 Reinforcement, 28 Surface material support bracket, 33 Outer vertical frame, 33c Outer vertical frame base

Claims (4)

A first shoji screen is provided on the interior side of the frame body in the projection direction, and a second shoji screen is provided on the exterior side of the frame body, and the first shoji screen and the second shoji screen are each constructed by attaching a frame to the four periphery of a surface material.
The first shoji screen has a vertical frame that serves as the door end and is fixed to the vertical frame of the frame body,
A thermal expansion member is disposed between the vertical frame and the vertical frame,
The surface material of the first shoji screen is a double-glazed glass having a plurality of glass sheets with different fire resistance strengths arranged opposite each other,
The vertical frame that is the joint of the first shoji screen has a hollow portion,
A fixture characterized in that the frames that make up the first and second shoji screens have reinforcing material molded from a material with a smaller linear expansion coefficient than the vertical frames disposed only in the hollow portion of the vertical frames that meet in the first shoji screen. The fixture according to claim 1, characterized in that the reinforcing material is connected only to the part of the hollow portion of the vertical frame that corresponds to the glass with high fire resistance. The fitting according to claim 1, characterized in that the reinforcing material is arranged so that the center of gravity is biased toward the part of the hollow portion of the vertical frame that corresponds to the glass with high fire resistance. The vertical frame is provided with a partition wall portion that divides the inside of the hollow portion into an outdoor side room and an indoor side room,
2. The fitting according to claim 1, wherein the reinforcing material is disposed only in a chamber corresponding to the glass having high fire resistance.

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