Fireproof door structure

Abstract

Prevents the lower tight device from igniting and the spread of fire caused by the lower tight device igniting. [Solution] A soundproof door 1 comprising a door body 4 and a lower tight device 6 that is provided at the bottom of the door body 4 and abuts against a bottom frame 22 to close the gap between the door body 4 and the bottom frame 22 at least when the door body 4 is closed, and a fire-prevention blocking member 7 is provided at the bottom of the door body 4 on at least one of the outdoor side and indoor side of the lower tight device 6, the blocking member 7 being stored inside the door body 4 when there is no fire, and moving downward to abut against the bottom frame 22 in the event of a fire, thereby closing the gap between the door body 4 and the bottom frame 22.

Description

[Technical Field]

[0001] The present invention relates to a fire prevention structure for a door that is applied to a sound insulating door or the like. [Background technology]

[0002] Patent document 1 shows a soundproof door equipped with a lower tight device that is provided at the bottom of the door body and abuts against the bottom frame (sill) when the door body is closed to close the gap between the door body and the bottom frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-39260 Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the lower tight device is usually constructed using an elastic material such as rubber, if flames enter the lower part of the door body from the fire side (fire source side) of the door during a fire, the lower tight device will ignite, and there is a risk that the fire will spread to the non-fire side of the door. [Means for solving the problem]

[0005] The present invention was created in view of the above-mentioned circumstances and with the aim of solving these problems. The invention of claim 1 is a fireproof door structure comprising a door body and a lower tight device provided at the bottom of the door body and abutting against the bottom frame to close the gap between the door body and the bottom frame at least when the door body is closed, and further comprising a fireproof blocking member provided at the bottom of the door body on at least one of the outdoor side and the indoor side of the lower tight device, the blocking member being stored inside the door body when there is no fire, and moving downward to abut against the bottom frame when there is a fire, thereby closing the gap between the door body and the bottom frame. The invention of claim 2 is a fireproof structure for a door described in claim 1, characterized in that the blocking member is connected to the door body via a connecting member, and the connecting member is made of a shape memory alloy that deforms when exposed to heat. The invention of claim 3 is a fireproof structure for a door described in claim 1, characterized in that the blocking member is connected to the door body via a connecting member, and the connecting member is an adhesive that melts when exposed to heat. The invention of claim 4 is a fireproof structure for a door described in claim 1, characterized in that the blocking member is connected to the door body via a connecting member, and the connecting member is a fuse that melts when exposed to heat. Claim 5 is a fireproof structure for a door according to any one of claims 1 to 4, characterized in that the blocking member is provided at the lower part of the door body on both the outdoor side and the indoor side of the lower tight device. [Effects of the Invention]

[0006] According to the invention of claim 1, a fire prevention blocking member is provided on at least one of the outdoor and indoor sides of the lower door device, which moves downward in the event of a fire to block the gap between the door body and the bottom frame. For example, when the blocking member is located on the side of the fire source relative to the lower door device, the blocking member isolates the lower door device from the source of the fire, preventing the lower door device from catching fire. Also, when the blocking member is located on the side opposite the fire source relative to the lower door device, the blocking member isolates the side opposite the fire source relative to the lower door device, preventing the fire from spreading to the opposite side of the fire. According to the invention of claim 2, the blocking member is connected to the door body via a connecting member, and the connecting member is made of a shape memory alloy that deforms when exposed to heat, so that the deformation of the shape memory alloy due to the heat of a fire reliably activates the blocking member, thereby blocking the gap between the door body and the bottom frame. According to the invention of claim 3, the blocking member is connected to the door body via a connecting member, and the connecting member is made of an adhesive that melts when exposed to heat, so that the blocking member can be reliably operated by the heat of a fire dissolving the adhesive, thereby sealing the gap between the door body and the bottom frame. According to the invention of claim 4, the blocking member is connected to the door body via a connecting member, and the connecting member is a fuse that melts when exposed to heat. Therefore, the melting of the fuse by the heat of a fire reliably activates the blocking member, thereby sealing the gap between the door body and the bottom frame. According to the invention of claim 5, the blocking members are provided at the bottom of the door body on both the outdoor and indoor sides of the lower tight device, so that regardless of whether the source of the fire is on the outdoor or indoor side relative to the lower tight device, one blocking member not only isolates the lower tight device from the source of the fire, preventing the lower tight device from catching fire, but the other blocking member isolates the lower tight device from the side opposite the source of the fire, preventing the fire from spreading to the opposite side of the source of the fire. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a front view of a sound insulating door according to a first embodiment. [Figure 2] FIG. 1 is a plan cross-sectional view of a sound insulating door according to a first embodiment. [Figure 3] FIG. 2 is a side cross-sectional view of the sound insulating door of the first embodiment. [Figure 4] FIG. 10 is a side cross-sectional view showing the lower part of the soundproof door of the first embodiment, where (a) shows the state in which the outdoor-side and indoor-side blocking members have been moved downward, (b) shows the state in which only the outdoor-side blocking member has been moved downward, and (c) shows the state in which only the indoor-side blocking member has been moved downward. [Figure 5] 3 is a front cross-sectional view of a main part showing the connecting structure between the door body and the blocking member of the first embodiment. FIG. [Figure 6] 10(a) is a side cross-sectional view showing a lower part of a sound insulating door of a second embodiment, and FIG. 10(b) is a front cross-sectional view of a main part showing a connecting structure between a door body and a blocking member of the second embodiment. [Figure 7] FIG. 10 is a side cross-sectional view showing the lower part of the soundproof door of the second embodiment, where (a) shows a state in which only the outdoor-side blocking member has moved downward, (b) shows a state in which only the indoor-side blocking member has moved downward, and (c) shows a state in which both the outdoor-side and indoor-side blocking members have moved downward. [Figure 8]10(a) is a side cross-sectional view showing a lower part of a sound insulating door of a third embodiment, and FIG. 10(b) is a front cross-sectional view of a main part showing a connecting structure between a door body and a blocking member of the third embodiment. [Figure 9] 10A and 10B are side cross-sectional views showing the lower part of the soundproof door of the third embodiment, in which (a) shows the state where only the blocking member on the outdoor side has moved downward, (b) shows the state where only the blocking member on the indoor side has moved downward, and (c) shows the state where both the blocking members on the outdoor side and the indoor side have moved downward. [Figure 10] FIG. 10 is a side cross-sectional view of a sound insulating door according to a reference example. DETAILED DESCRIPTION OF THE INVENTION

[0008] [First embodiment] First, a first embodiment of the present invention will be described with reference to FIGS.

[0009] (soundproof door) 1 to 3, reference numeral 1 denotes a double-swing soundproof door, which comprises a frame 2 fixed to an opening in a building, and a double-swing door body 4 that is provided inside the frame 2 so as to be able to open and close via a plurality of hinges 3. Note that the door body 4 is not limited to a double-swing door, and may be a single-swing door. For convenience, in the following description, the thickness direction of the door body 4 will be referred to as the front-to-rear direction, the height direction of the door body 4 as the up-to-down direction, and the direction perpendicular to the front-to-rear direction and the up-to-down direction as the left-to-right direction.

[0010] (Frame) The frame body 2 is formed into a rectangle in front view by a metal upper frame 21, a lower frame 22, and left and right vertical frames 23. The left and right vertical frames 23 each support the left and right door bodies 4 via a plurality of hinges 3 so that they can be opened and closed. The inside of the upper frame 21 and the left and right vertical frames 23 is filled with a filler 24 such as glass wool that has heat insulating and sound absorbing properties.

[0011] (Door body) The door body 4 comprises a metal frame 41, a reinforcing member 42, and a pair of front and back surface members 43. The frame 41 is formed into a rectangle in a front view by an upper frame 41a, a lower frame 41b, and left and right vertical frames 41c. The reinforcing member 42 is disposed inside the frame 41. The surface members 43 are arranged to sandwich the frame 41 and the reinforcing member 42 from the front and back, and constitute the outdoor surface (exterior surface) and indoor surface (interior surface) of the door body 4.

[0012] The door body 4 has a door edge portion provided with a joint 44, 45 extending across the entire vertical length. When the left and right door bodies 4 are closed, one joint 44 approaches or abuts the outdoor surface of the other door body 4, and the other joint 45 approaches or abuts the indoor surface of the other door body 4, thereby covering the gap between the door edge portions of the left and right door bodies 4. The lower part of the door body 4 is covered by the lower frame 41b and the front and back surface materials 43, and a lower space K is formed that is open downward. The interior of the door body 4 is filled with a filler 46, such as rock wool, which has heat insulating and sound absorbing properties.

[0013] (Airtight material) The soundproof door 1 is provided with a plurality of airtight materials 51-53 that airtightly seal gaps between the frame 2 and the door body 4 and gaps between the door edges of the door bodies 4. All of the airtight materials 51-53 are made of an elastic material such as rubber. The first airtight material 51 is provided in a step portion facing the front of the upper frame 21, and when the door body 4 is in a closed state, it elastically abuts against the surface material 43 of the door body 4, thereby airtightly sealing the gap between the upper frame 21 and the door body 4. The second airtight material 52 is provided in a step portion facing the front of the vertical frame 23, and when the door body 4 is in a closed state, it elastically abuts against the surface material 43 of the door body 4, thereby airtightly sealing the gap between the vertical frame 23 and the door body 4. In addition, the third airtight material 53 is provided at the joint portion 45, and when the door body 4 is in the closed state, it elastically abuts against the surface material 43 of the door body 4, thereby airtightly sealing the gap between the door edge portions of the door bodies 4.

[0014] (Lower Tight Device) 3 and 4, a lower sealing device 6 is provided in the lower part of the door body 4 (lower space K) to abut against the upper surface of the lower frame 22 when the door body 4 is in a closed state, and airtightly seal the gap between the door body 4 and the lower frame 22. The lower sealing device 6 includes a bracket 61 that is in an inverted U-shape in a side view and extends downward from the lower surface of the lower frame 41b in the lower space K, an airtight material 62 that is made of an elastic material such as rubber and is housed in the bracket 61 so that it can move up and down, and an airtight material lifting mechanism (not shown) that lifts and lowers the airtight material 62 in response to the opening and closing of the door body 4.

[0015] The airtight material lifting mechanism includes, for example, a parallel link mechanism that supports the airtight material 62 so that it can be raised and lowered, a spring that urges the airtight material 62 in an upward direction, and a rod that protrudes from the door end of the door body 4. When the door body 4 is in the open position, the airtight material 62 is raised by the urging force of the spring and the rod protrudes. As a result, the airtight material 62 does not come into contact with the floor. On the other hand, when the door body 4 is in the closed position, the rod abuts against the vertical frame 23 and is pushed into the door body 4, and the parallel link mechanism moves the airtight material 62 downward against the urging force of the spring. As a result, the airtight material 62 elastically abuts against the bottom frame 22, and the gap between the door body 4 and the bottom frame 22 is airtightly sealed.

[0016] Such a lower sealing device 6 is constructed using an airtight material 62 made of an elastic material such as rubber, so if flames enter the lower part of the door body 4 from the side of the source of the fire in the event of a fire, the lower sealing device 6 will ignite, and there is a risk that the fire will spread to the opposite side of the source of the fire.

[0017] (Fire prevention blocking material) 3 to 5, a fire-prevention blocking member 7 is provided in the lower part (lower space K) of the door body 4. The blocking member 7 can be provided on at least one of the outdoor side and the indoor side of the lower sealing device 6 in the lower space K, and in this embodiment, the blocking member 7 is provided on both the outdoor side and the indoor side of the lower sealing device 6.

[0018] The blocking member 7 is stored inside the door body 4 (lower space K) when there is no fire, and when there is a fire, it moves downward and abuts against the lower frame 22, thereby blocking the gap between the door body 4 and the lower frame 22 on the outdoor side or indoor side of the lower tight device 6.

[0019] As a result, if the blocking member 7 on the fire source side moves downward relative to the lower tight device 6, the blocking member 7 will cut off the lower tight device 6 from the fire source, preventing the lower tight device from catching fire. For example, if the fire source is on the outdoor side, this corresponds to the state shown in Figure 4(b), and if the fire source is on the indoor side, this corresponds to the state shown in Figure 4(c).

[0020] Furthermore, when the blocking member 7 on the opposite side of the fire source relative to the lower sealing device 6 moves downward, the blocking member 7 blocks the lower sealing device 6 from the opposite side of the fire source, thereby preventing the fire from spreading to the opposite side of the fire source. For example, if the fire source is on the outdoor side, this corresponds to the state shown in Figure 4(c), and if the fire source is on the indoor side, this corresponds to the state shown in Figure 4(b).

[0021] Furthermore, when the blocking members 7 on the outdoor and indoor sides of the lower tight device 6 move downward (see (a) of Figure 4), regardless of whether the source of the fire is on the outdoor or indoor side relative to the lower tight device 6, not only will one blocking member 7 block the lower tight device 6 from the source of the fire, preventing the lower tight device 6 from catching fire, but the other blocking member 7 will block the lower tight device 6 from the side opposite the source of the fire, preventing the fire from spreading to the opposite side of the source of the fire.

[0022] Specifically, the blocking member 7 of this embodiment comprises a fixing member 71 fixed between the bracket 61 and the surface material 43 in the lower space K, a plurality of connecting members 72, and a blocking member main body 73 connected to the fixing member 71 via the plurality of connecting members 72.

[0023] The blocking member main body 73 is formed from a non-flammable or flame-retardant material (e.g., metal), and its shape is not limited as long as it can block the gap between the door main body 4 and the lower frame 22 when moved downward from the lower space K.

[0024] The connecting member 72 in this embodiment is made of a shape memory alloy that deforms when exposed to heat. Specifically, it has a coil spring shape made of a shape memory alloy, and when there is no fire, it maintains a contracted state to hold the blocking member main body 73 in the lower space K. When there is a fire, it deforms to an extended state due to the heat of the fire, moving the blocking member main body 73 downward.

[0025] The deformation temperature of the shape memory alloy that constitutes the indoor-side connecting member 7 and the deformation temperature of the shape memory alloy that constitutes the outdoor-side connecting member 7 may be the same or different. For example, if the deformation temperature of the indoor-side shape memory alloy is lower than the deformation temperature of the outdoor-side shape memory alloy, even if the source of the fire is on the outdoor side, the indoor-side connecting member 7 can be moved downward first, thereby creating the state shown in Figure 4(c). Furthermore, depending on the installation environment of the screening door 1, the deformation temperature of the indoor-side shape memory alloy may be higher than the deformation temperature of the outdoor-side shape memory alloy.

[0026] (Effects of the embodiment) According to this embodiment configured as described above, at least one of the outdoor and indoor sides of the lower tight device 6 is provided with a fire prevention blocking member 7 that moves downward in the event of a fire to block the gap between the door body 4 and the lower frame 22. For example, when the blocking member 7 is located on the side of the fire source relative to the lower tight device 6, the blocking member 7 isolates the lower tight device 6 from the fire source, thereby preventing the lower tight device 6 from catching fire. Also, when the blocking member 7 is located on the side opposite the fire source relative to the lower tight device 6, the blocking member 7 isolates the lower tight device 6 from the side opposite the fire source, thereby preventing the fire from spreading to the opposite side of the fire source.

[0027] In addition, the blocking member 7 in this embodiment is provided at the bottom of the door body 4 on both the outdoor and indoor sides of the lower tight device 6, so regardless of whether the source of the fire is on the outdoor or indoor side relative to the lower tight device 6, not only will one blocking member 7 isolate the lower tight device 6 from the source of the fire, preventing the lower tight device 6 from catching fire, but the other blocking member 7 will isolate the lower tight device 6 from the side opposite the source of the fire, preventing the fire from spreading to the opposite side of the source of the fire.

[0028] In addition, the connecting member 72 in this embodiment is made of a shape memory alloy that deforms when exposed to heat, so the deformation of the shape memory alloy due to the heat of a fire reliably activates the blocking member 7, thereby blocking the gap between the door body 4 and the bottom frame 22.

[0029] [Second embodiment] Next, second and third embodiments of the present invention will be described with reference to Figures 6 to 9. However, for configurations common to the first embodiment described above, the same reference numerals as in the first embodiment will be used, and the description of the first embodiment may be used.

[0030] 6 and 7, the second embodiment differs from the first embodiment in that when connecting a closing member main body 73B to the door main body 4 (lower frame 41b) via a connecting member 72B, the connecting member 72B is a fuse that melts when heated. According to the second embodiment, the closing member main body 73B can be reliably activated by melting the fuse due to the heat of a fire, thereby closing the gap between the door main body 4 and the lower frame 22. The melting temperature of the fuse that constitutes the indoor-side connecting member 72B and the melting temperature of the fuse that constitutes the outdoor-side connecting member 72B may be the same or different.

[0031] [Third embodiment] 8 and 9, the third embodiment differs from the first embodiment in that, when connecting a closing member main body 73C to the door main body 4 (surface material 43) via a connecting member 72C, the connecting member 72C is made of a heat-melting adhesive. According to the third embodiment, the heat of a fire melts the adhesive, causing the closing member main body 73C to reliably operate and close the gap between the door main body 4 and the bottom frame 22. The melting temperature of the adhesive constituting the indoor-side connecting member 72C and the melting temperature of the adhesive constituting the outdoor-side connecting member 72C may be the same or different.

[0032] The present invention is not limited to the above-described embodiment. For example, the fireproof door structure of the present invention is not limited to the above-described soundproof door, but can also be applied to doors other than soundproof doors.

[0033] 10, a fireproof door structure is also proposed in which a heated foaming material 101 that foams when heated is provided at the lower end of the door body 100, and in the event of a fire, the heated foaming material 101 foams to close the gap S between the door body 100 and the lower frame 103 on the outdoor side (outdoor side) or indoor side (indoor side) of the lower sealing device 102. In the above-mentioned embodiment, this gap S is closed with the closing member 7, but it is also possible to provide the heated foaming material 101 together and close the gap S with the closing member 7 and the heated foaming material 101. [Explanation of symbols]

[0034] 1. Soundproof door 2 frame 21 Upper frame 22 Bottom frame 23 Vertical Frame 24 Filling material 3 Hinge 4 Door body 41 frames 41a Upper frame 41b Lower frame 41c vertical frame 42 Reinforcement 43 Surface material 44 Meshiawase 45 Meshi-awase 46 Filler 51 First Airtight Material 52 Second airtight material 53 Third Airtight Material 6 Lower Tight Device 61 Bracket 62 Airtight material 7 Closing material 71 Fixing member 72, 72B, 72C connecting members 73, 73B, 73C Closure member body 100 Door body 101 Heat-foaming material 102 Lower Tight Device 103 Lower purlin

Claims

1. The door body and A fire prevention structure for a door comprising: a lower tight device provided at a lower part of the door body, which contacts a bottom frame to close a gap between the door body and the bottom frame at least when the door body is in a closed state; A fire-prevention blocking member is provided at the lower part of the door body on at least one of the outdoor side and the indoor side of the lower tight device, The fireproof door structure is characterized in that the blocking member is stored inside the door body when there is no fire, and moves downward and abuts against the bottom frame when there is a fire, thereby blocking the gap between the door body and the bottom frame.

2. The blocking member is connected to the door body via a connecting member, 2. The fireproof door structure according to claim 1, wherein the connecting member is made of a shape memory alloy that deforms when exposed to heat.

3. The blocking member is connected to the door body via a connecting member, 2. The fireproof door structure according to claim 1, wherein the connecting member is an adhesive that melts when heated.

4. The blocking member is connected to the door body via a connecting member, 2. The fireproof door structure according to claim 1, wherein the connecting member is a fuse that melts when heated.

5. A fireproof door structure as described in any one of claims 1 to 4, characterized in that the blocking member is provided at the lower part of the door body on both the outdoor side and the indoor side of the lower tight device.

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