JP7772633B2 - Building materials - Google Patents

Description

The present invention relates to a fitting in which the frame material that makes up the frame has a metal frame portion molded from metal and a resin frame portion molded from resin.

Some building materials have a frame body made of a metal frame on the outside that is made of a metal such as an aluminum alloy, and a resin frame on the inside that is made of a resin, taking into account thermal insulation properties (see, for example, Patent Document 1).

JP 2018-104971 A

However, when a fixture with the above-described configuration is exposed to high temperatures, such as during a fire, the resin frame can melt or burn. This leaves the gap between the door and the frame exposed to the outside, raising concerns that a flame could penetrate from the inside to the outside, which is detrimental to fire safety.

In light of the above situation, the present invention aims to provide building materials that can improve thermal insulation and fire resistance.

To achieve the above objective, the fitting of the present invention comprises a frame body and a door body arranged to be openable and closable relative to the frame body, the frame material of which comprises a metal frame portion molded from metal and a resin frame portion molded from resin, and the fitting comprises a base member molded from a metal separate from the metal frame portion, which has a visible portion that overlaps the door body in the closed state in the forward direction, and is supported by the metal frame portion with the resin frame portion interposed between the visible portion and the door body, and a thermal expansion member is arranged on the surface of the base member covered by the resin frame portion in a position that overlaps the door body in the closed state in the forward direction.

According to this invention, a base member is provided so that it overlaps the door body in the closed position in the forward direction, and a thermal expansion member is provided on the base member. Therefore, even if the resin frame is exposed to high temperatures and melts or burns, the thermal expansion member expands, preventing the creation of a flame hole in the indoor/outdoor direction, thereby improving the fire resistance of insulating building materials.

1 is a view of a fitting according to a first embodiment of the present invention as seen from the outside of the room. FIG. FIG. 2 is a vertical cross-sectional view of the fixture shown in FIG. 1 . FIG. 2 is a cross-sectional view of the fixture shown in FIG. 1 . FIG. 2 is a cross-sectional view showing a main part of the fixture shown in FIG. 1 . FIG. 2 is a cross-sectional view of a main part showing a modified example of the fitting shown in FIG. 1 . A cross-sectional view showing the main parts of a fixture according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view of a main part showing a modified example of the fitting shown in FIG. 6 .

Below, preferred embodiments of the fittings according to the present invention will be described in detail with reference to the accompanying drawings. Note that, for convenience, the terms "prospect direction" and "visibility direction" will sometimes be used below. The prospect direction is the direction along the depth of the fitting, as indicated by arrow A in the figure. A surface along the prospect direction will sometimes be referred to as a "visibility surface." The prospect direction is the direction perpendicular to the prospect direction for items that extend horizontally, such as sill frames. For items that extend vertically, such as vertical frames, the horizontal direction perpendicular to the prospect direction is called the "visibility direction." A surface along the prospect direction will sometimes be called a "visibility surface."

(Embodiment 1)
1 to 4 show a fitting according to a first embodiment of the present invention. The fitting illustrated here is used as a front door and comprises a frame 10 and a door element 20 disposed on the frame 10 so as to be able to open and close. Although not shown in the figures, one side edge of the door element 20 is supported by the frame 10 via a hinge 1, and the door element 20 can be opened toward the outside around a hinge axis extending vertically. The frame 10 is formed by assembling an upper frame 11, a lower frame 12, and left and right vertical frames 13 and 14 around its four sides. Each of the frame members 11, 12, 13, and 14 has a frame main body portion 11B, 12B, 13B, or 14B that is disposed on the outer periphery of the door element 20 when closed, and a door stop portion 11C, 12C, 13C, or 14C that is disposed opposite the surface of the door element 20 that faces the interior of the room. The parts of the door stops 11C, 12C, 13C, and 14C that face the outside are fitted with a continuous seal material D around all four sides. When the door body 20 is closed against the frame body 10, the seal material D abuts against the peripheral edge of the door body 20, ensuring watertightness and airtightness.

In this first embodiment, the lower frame 12 is made of a metal such as an aluminum alloy, with the frame body 12B and doorstop 12C integrally molded. In contrast, the upper frame 11 and left and right vertical frames 13, 14 are made of a metal such as an aluminum alloy, with the frame body 11B, 13B, 14B molded from the metal, while the doorstops 11C, 13C, 14C are molded from resin. Below, the configuration of the vertical frames 13, 14 will be described in detail, along with an explanation of the features of the present invention. Note that because the vertical frames 13, 14 are symmetrical to each other, the following explanation will focus on the vertical frame 13, which forms the door end.

The frame body (metal frame) 13B and doorstop (resin frame) 13C of the vertical frame 13 are each extruded sections formed to have a substantially uniform cross-sectional shape along their entire length. In the illustrated example, the frame body 13B is formed by integrally molding a hollow frame base 31, a connection fin 32 that connects to the doorstop 13C, and a nail fin 33 for fastening to the main frame E. The front surface 31a of the frame base 31 facing the interior of the room is the covering surface that faces the main frame E when the vertical frame 13 is attached to the main frame E, and is flat and extends along the front surface direction. The front surface 31b of the frame base 31 on the inner periphery facing the door body 20 is also flat and extends along the front surface direction. At the intersection of the inner peripheral face 31b of the frame base 31 and the visible face 31c facing outside the room, a concave step 31d is provided where the smoke deflector 21 of the door body 20 is positioned when the door body 20 is closed. The connection receiving fin portion 32 extends in the visible direction toward the room from the inner peripheral portion of the visible face 31a of the frame base 31 facing inside the room. The nail fin portion 33 extends in the visible direction toward the room from the protruding corner where the visible face 31a of the frame base 31 facing inside the room and the outer peripheral face 31e intersect, and then extends so as to protrude toward the outer periphery.

The doorstop portion 13C of the vertical frame 13 is integrally formed with a doorstop base 41 extending along the front-facing direction and a connecting fin portion 42 attached to the outer peripheral edge of the doorstop base 41. The connecting fin portion 42 is connected to the frame main body 13B with the outer peripheral surface 42a of the connecting fin portion 42 overlapping the inner peripheral surface 32a of the connecting fin portion 32. The doorstop base 41 is hollow and rectangular in cross section, with its dimension in the front-facing direction greater than that of the front-facing direction. The dimension of the doorstop base 41 along the front-facing direction is set so that it extends to a position that overlaps the door body 20 in the front-facing direction when the door is closed. The connecting fin portion 42 extends from the outer peripheral portion of the doorstop base 41 toward the outside in the front-facing direction, and has a longer extension length than the connecting fin portion 32 of the frame main body 13B. When the connecting fin portion 42 is placed over the inner peripheral surface 32a of the connecting receiving fin portion 32, the inner peripheral surface 42b is configured to be positioned on approximately the same plane as the inner peripheral surface 31b of the frame base 31.

The doorstop portion 13C is also provided with an attachment groove 41a, a bulge 43, and a cover fin 44. The attachment groove 41a is a recess for attaching the aforementioned weatherstripping material D, and opens to the inner periphery of the visible surface 41b of the doorstop base 41, which faces the exterior of the room. The bulge 43 is a hollow, rectangular cross-section that protrudes from the outer periphery of the visible surface 41b of the doorstop base 41. When the connecting fin portion 42 is placed on the inner periphery of the visible surface 32a of the connecting support fin portion 32, the bulge 43 protrudes outward beyond the connecting support fin portion 32, and is sized to ensure a gap is maintained between the visible surface 43a and the connecting support fin portion 32. The cover fin 44 extends from the inner periphery of the doorstop base 41 in the visible direction toward the room. In this embodiment 1, the visible surface 41b of the doorstop base 41 facing the room, the visible surface 43b on the outer periphery of the bulge 43, and the visible surface 44a on the outer periphery of the cover fin 44 become the covering surfaces facing the frame E when the vertical frame 13 is attached to the frame E.

The vertical frame 13 having the above-described configuration has a separate base member 50 attached to the frame main body 13B, and a thermal expansion member 60 disposed via the base member 50. The base member 50 is a thin plate-like member formed from a metal such as steel or aluminum, and is designed so that its longitudinal dimensions are approximately the same as those of the vertical frame 13. In this embodiment 1, the base member 50 includes a projection plate portion 51, an attachment plate portion 52, and a sight plate portion (sight portion) 53. The projection plate portion 51 is a flat plate with a length greater than the dimension along the projection direction from the interior-facing surface 41b of the doorstop base 41 of the doorstop portion 13C to the extending edge of the connecting fin portion 42. The attachment plate portion 52 and the sight plate portion 53 are flat plates extending away from the end of the projection plate portion 51. The dimensions of the sight plate 53 are set so that when the sight plate 51 abuts against the bulge 43 of the doorstop 13C, it can cover almost the entire sight surface 41b of the doorstop base 41 that faces the interior of the room. In the example shown, the base member 50 is attached to the frame main body 13B by threading metal screws 54 into the sight surface 31a of the frame base 31 via the mounting plate 52, with the sight plate 51 abutting against the bulge 43 and the sight plate 53 covering the sight surface 41b of the doorstop base 41 that faces the interior of the room.

The thermal expansion member 60 is a non-flammable or flame-retardant fire-resistant material that expands due to heat. For example, a thermally expandable graphite-containing foam material can be used. In this embodiment 1, the thermal expansion member 60 is a strip-shaped member with a certain width that is continuously and without gaps along the entire longitudinal length of the sighting surface 53a of the sighting plate portion 53 of the base member 50 that faces the outside of the room. In other words, the surface 53a that faces the sighting surface 41b of the door stop base 41 that faces the inside of the room. In the illustrated example, a thermal expansion member 60 with a width greater than the distance from the sighting surface 31b on the inner periphery of the frame base 31 to the door edge surface 20a of the door body 20 is used, and the thermal expansion member 60 is disposed on the base member 50 so as to overlap the gap between the sighting surface 31b on the inner periphery of the frame base 31 and the door edge surface 20a of the door body 20, as well as the door body 20 in the front direction.

As is clear from the figure, this vertical frame 13 is attached to the main body E with the visible surface 31a facing the interior of the room of the frame base 31, including the mounting plate portion 52 of the base member 50, the visible surface 51a on the outer periphery of the visible plate portion 51 of the base member 50, the visible surface 53b facing the interior of the visible plate portion 53, and the visible surface 44a on the outer periphery of the cover fin portion 44 all facing the main body E.

In the fittings configured as described above, the upper frame 11 and left and right vertical frames 13, 14 that make up the frame body 10 each have an exterior frame main body 13B molded from metal and an interior doorstop 13C molded from resin, providing advantages in terms of thermal insulation. Furthermore, even if the doorstop 13C is exposed to high temperatures, such as during a fire, and melts or burns away, the metal base member 50 maintains its position relative to the frame main body 13B. Therefore, the expansion of the thermally expandable member 60 attached to the base member 50 reliably seals the gap with the door body 20, preventing flames from penetrating between the interior and exterior, providing advantages in terms of fire resistance. In addition, the base member 50 is arranged along the covering surfaces of the vertical frame 13, i.e., the visible surface 31a of the frame base 31 facing the interior of the room, the visible surface 41b of the doorstop base 41 facing the interior of the room, the visible surface 43b on the outer periphery of the bulge 43, and the visible surface 44a on the outer periphery of the cover fin 44. Therefore, when the vertical frame 13 is attached to the frame E, it is covered by the frame E and is not exposed to the outside. The thermally expandable member 60 is also covered by the doorstop base 41 of the doorstop portion 13C and is difficult to see from the outside. Therefore, there is no risk that the base member 50 and thermally expandable member 60 will detract from the appearance quality of the building fixture.

In the above-described first embodiment, the base member 50 is attached to the frame main body 13B with the mounting plate portion 52 directly abutting the frame base 31. However, as shown in the modified example in Figure 5, a heat insulating material 2 may be interposed between the mounting plate portion 52 and the frame base 31. This modified example prevents the base member 50 from becoming a thermal bridge, providing greater advantages in terms of thermal insulation. In this modified example, the same components as those in the first embodiment are designated by the same reference numerals.

(Embodiment 2)
FIG. 6 shows the vertical frame portion of a fixture according to a second embodiment of the present invention. The fixture illustrated here, like the first embodiment shown in FIG. 1, is used as a front door. Although not explicitly shown in the figure, this second embodiment also uses a lower frame in which the frame body and doorstop are integrally molded from a metal such as an aluminum alloy, while the upper frame and left and right vertical frames are configured with a frame body molded from a metal such as an aluminum alloy and doorstops molded from a resin. Below, we will describe in detail the configuration of the vertical frame 113 on the door end side used in the fixture according to the second embodiment, and also explain the characteristics of the present invention.

The metal frame body (metal frame) 113B and resin doorstop (resin frame) 113C that make up the vertical frame 113 are each extruded sections formed to have a substantially uniform cross-sectional shape along their entire length. The frame body 113B of the vertical frame 113 is integrally formed with a hollow frame base 131, a connecting fin 132 and hook 133 that connect to the doorstop 113C, and a nail fin 134 for securing to the main body. The inner peripheral visible surface 131a of the frame base 131 facing the door body 20 is flat and extends along the visible direction. The connecting fin 132 extends from approximately the center of the visible surface 131c of the frame base 131 that faces the interior of the room in the visible direction toward the interior of the room. An engaging claw 132a is provided on the extending edge of the connection receiving fin portion 132 so as to protrude toward the inner periphery. The hook portion 133 extends toward the interior from the corner where the interior-facing face 131c of the frame base 131 intersects with the inner peripheral face 131a, and then bends toward the outer periphery. The nail fin portion 134 extends so as to protrude toward the outer periphery from the corner where the interior-facing face 131c of the frame base 131 intersects with the outer peripheral face 131d.

The doorstop portion 113C of the vertical frame 113 is integrally formed with a connecting portion 141 extending along the front-to-back direction and a doorstop base 142 extending from the indoor-side portion of the connecting portion 141 in the front-to-back direction. The outdoor-side portion of the connecting portion 141 is attached between the connecting fin portion 132 and the hook portion 133, thereby connecting it to the frame main body 113B. The dimension of the connecting portion 141 along the front-to-back direction is set so that, when attached to the frame main body 113B, the inner peripheral front surface 141a is substantially flush with the inner peripheral front surface 131a of the frame base 131. The dimension of the doorstop base 142 along the front-to-back direction is set so that it extends to a position that overlaps the front-to-back direction of the door body 20 in the closed state. The connecting portion 141 and the doorstop base 142 are hollow and communicate with each other. A support wall portion 143 is provided within the hollow interior of the connecting portion 141. The support wall portion 143 is a plate-like member that extends along the viewing direction.

The doorstop portion 113C is also provided with an attachment groove 142a and a cover fin portion 144. The attachment groove 142a is a recess for attaching the weatherstripping material D, and opens to the inner periphery of the facing surface 142b of the doorstop base 142 that faces the outside of the room. The cover fin portion 144 extends from the inner periphery of the doorstop base 142 toward the inside of the room.

The vertical frame 113 having the above-described configuration has a base member 150 attached to the hollow interior of the doorstop portion 113C, and a thermal expansion member 160 disposed on the base member 150. The base member 150 is a thin plate-like member formed from a metal such as steel or aluminum, and is designed so that its longitudinal dimensions are approximately the same as those of the vertical frame 113. In this second embodiment, the base member 150 includes a projection plate portion 151, an attachment plate portion 152, and a sight plate portion (sight portion) 153. The projection plate portion 151 is a flat plate with a length approximately equal to the dimension along the projection direction from the support wall portion 143 within the hollow interior of the doorstop portion 113C to the portion extending in the sight direction on the indoor side. The attachment plate portion 152 and the sight plate portion 153 are flat plates extending in directions away from each other from the ends of the projection plate portion 151. The dimensions of the sight plate 153 are set so that, when the mounting plate 152 is positioned approximately in the center of the support wall 143, it can cover almost the entire surface of the sight surface 142c located on the indoor side within the hollow interior of the doorstop base 142. In the illustrated example, with the sight plate 153 covering almost the entire surface of the sight surface 142c of the doorstop base 142, the base member 150 is attached to the frame main body 113B by threading metal screws 154 into the frame base 131 via the mounting plate 152 and the support wall 143. The thermally expandable member 160 is a non-flammable or flame-retardant fire-resistant member that expands due to heat, and for example, a thermally expandable foam containing graphite can be used. In this second embodiment, a band-shaped thermal expansion member 160 with a fixed width is continuously and without gaps along the entire length of the sighting surface 153a facing the outside of the room on the sighting plate portion 153 of the base member 150. In the illustrated example, a thermal expansion member 160 with a width greater than the distance from the sighting surface 131a on the inner periphery of the frame base 131 to the door edge surface 20a of the door body 20 is used, and the thermal expansion member 160 is arranged on the base member 150 so as to overlap the gap between the sighting surface 131a on the inner periphery of the frame base 131 and the door edge surface 20a of the door body 20, as well as the door body 20 in the sighting direction.

In the fittings configured as described above, the vertical frame 113 that constitutes the frame body 10 has an exterior frame body 113B molded from metal and an interior doorstop 113C molded from resin, providing advantages in terms of thermal insulation. Furthermore, even if the doorstop 113C were to melt or burn due to exposure to high temperatures, such as during a fire, the metal base member 150 would maintain its position relative to the frame body 113B. Therefore, the expansion of the thermally expandable member 160 attached to the base member 150 reliably seals the gap with the door body 20, preventing the formation of a flame hole in the interior and exterior directions, providing advantages in terms of fire prevention. Additionally, because the base member 150 and the thermally expandable member 160 are located within the hollow interior of the doorstop 113C, they are not exposed to the outside. Therefore, there is no risk that the base member 150 and thermally expandable member 160 will impair the appearance quality of the fixture. Furthermore, because the doorstop portion 113C, which is molded from resin, is interposed between the mounting plate portion 152 of the base member and the frame base portion 131, the base member 150 can be prevented from becoming a thermal bridge, providing further advantages in terms of thermal insulation.

Figure 7 shows a modified version of embodiment 2. In this modified version, in addition to the configuration of embodiment 2, an additional thermal expansion member 161 is arranged in the mounting groove 142a. The other configurations are the same as embodiment 2. According to this modified version, when the fitting is exposed to high temperatures, the additional thermal expansion member 161 expands in addition to the thermal expansion member 160 arranged inside the hollow, making it possible to more reliably prevent the occurrence of a flame penetration hole in the indoor/outdoor direction.

While the above-described first and second embodiments both exemplify fittings used as entrance doors, the present invention can also be applied to other fittings as long as the frame materials that make up the frame have a metal frame portion molded from metal and a resin frame portion molded from resin. Also, while the base member and thermal expansion member are provided only on the vertical frame, they may also be applied to the upper frame, or the lower frame if it has a metal frame portion and a resin frame portion. In this case, it is sufficient to provide a base member on any one of the frame materials that make up the frame; it is not necessary to provide base members on two or more frame materials.

In addition, in the above-described first and second embodiments, the thermal expansion member is provided up to a position that overlaps the gap between the door body and the frame body in the projection direction, which has the advantage of allowing the gap to be directly sealed by the thermal expansion member. However, it is sufficient that the thermal expansion member is provided at a position that overlaps the door body in the projection direction when it is closed. Furthermore, the thermal expansion member does not need to be provided in a continuous manner along the length of the frame material, but can be provided in multiple segments that become continuous when expanded. Furthermore, the base member does not need to be continuous along the length of the frame material.

Furthermore, the specific shapes of the metal frame portion, resin frame portion, and base member described in the first and second embodiments above are given for illustrative purposes only, and other shapes may also be used.

As described above, the building fixture of the present invention comprises a frame body and a door body arranged to be openable and closable relative to the frame body, and the frame material constituting the frame body is a building fixture having a metal frame portion molded from metal and a resin frame portion molded from resin, and is molded from a metal separate from the metal frame portion and has a visible portion that overlaps in the forward direction with the door body in the closed state, and comprises a base member supported on the metal frame portion with the resin frame portion interposed between the visible portion and the door body, and is characterized in that a thermally expandable member is arranged on the surface of the base member covered by the resin frame portion in a position that overlaps in the forward direction with the door body in the closed state.
According to this invention, a base member is provided so as to overlap the door body in the closed state in the forward direction, and a heat-expanding member is provided on the base member.Therefore, even if the resin frame portion is exposed to high temperatures and melts or burns, the heat-expanding member will expand, preventing a situation in which a flame will penetrate in the indoor or outdoor direction, thereby making it possible to improve the fire resistance of insulating building materials.

The present invention is also characterized in that, in the above-mentioned building fixture, the thermally expandable member is provided in a portion that extends to the extension of the gap formed between the frame material and the door body.
According to this invention, the thermally expandable member expands, thereby making it possible to directly close the gap between the frame and the door.

The present invention is also characterized in that, in the above-mentioned building fixture, the metal frame portion and the resin frame portion have coated surfaces facing the main body, and the base member is supported by the metal frame portion in a state extending along the coated surface.
According to this invention, when the fixture is attached to the building frame, the base member is covered by the building frame, eliminating the concern that the appearance quality of the fixture will be impaired.

Furthermore, the present invention is characterized in that in the above-mentioned fitting, a heat insulating material separate from the resin frame portion is interposed at the connecting portion between the base member and the metal frame portion.
According to this invention, it is possible to prevent the base member from becoming a thermal bridge, which is more advantageous in terms of heat insulation.

The present invention is also characterized in that, in the above-mentioned building fixture, a hollow portion is provided in the resin frame portion in the part facing the door body in the forward direction, and the base member and the thermally expandable member are arranged inside the hollow portion.
According to this invention, the base member is not exposed to the outside, and there is no concern that the appearance quality of the fixture will be impaired.

Furthermore, the present invention is characterized in that in the above-mentioned fitting, the resin frame portion is interposed at the connecting portion between the base member and the metal frame portion.
According to this invention, it is possible to prevent the base member from becoming a thermal bridge, which is more advantageous in terms of heat insulation.

The present invention is also characterized in that, in the above-mentioned building fixture, the part of the resin frame portion facing the door body is provided with an attachment groove for attaching a tension material, and an additional thermally expandable member is arranged in the attachment groove at a position covered by the tension material.
According to this invention, it is possible to more reliably prevent a situation in which the expansion of the additional thermally expandable member causes a flame to penetrate in the indoor and outdoor directions.

2. Insulation material, 10. Frame, 13, 113. Vertical frame, 13B, 113B. Frame body, 13C, 113C. Door stop, 20. Door body, 31a. Frame base facing surface (covered surface), 41a, 142a. Mounting groove, 41b. Door stop base facing surface (covered surface), 43b. Bulge portion facing surface (covered surface), 44a. Cover fin portion facing surface (covered surface), 50, 150. Base member, 53, 53a. Facing surface, 60, 160, 161. Thermal expansion member, 153, 153a. Facing surface, D. Tight material, E. Frame

Claims (7)

A frame body and a door body disposed so as to be openable and closable relative to the frame body,
The frame material constituting the frame body is a fitting having a metal frame portion formed by metal and a resin frame portion formed by resin,
The door frame is made of a metal separate from the metal frame, has a front portion overlapping the door body in a closed state in a front direction, and is supported by the metal frame with the resin frame interposed between the front portion and the door body.
A fixture characterized in that a thermally expandable member is arranged on the surface of the base member covered by the resin frame portion in a position that overlaps in the forward direction with the door body in the closed state. The fitting described in claim 1, characterized in that the thermal expansion member is provided in a portion that extends to the extension of the gap formed between the frame material and the door body. the metal frame portion and the resin frame portion have a coated surface facing the frame body,
The fixture according to claim 1, wherein the base member is supported by the metal frame portion in a state in which it extends along the covering surface. The fitting described in claim 1, characterized in that a heat insulating material separate from the resin frame is interposed at the connection between the base member and the metal frame. The resin frame portion has a hollow portion provided in a portion facing the door body in the projection direction,
The fixture according to claim 1, wherein the base member and the thermally expandable member are disposed inside the hollow portion. The fitting described in claim 1, characterized in that the resin frame portion is interposed at the connection portion between the base member and the metal frame portion. A mounting groove for mounting a seal material is provided in a portion of the resin frame facing the door body,
The fixture according to claim 1, characterized in that an additional thermal expansion member is arranged in the mounting groove at a position covered by the tension material.