Fire prevention roller blind device

Abstract

To provide a fireproof roller blind device capable of imparting fireproof performance to an opening of a building. [Solution] The device comprises a roller blind 1 that opens and closes an opening 6, and a bottom bar 2 attached to the lower end of the roller blind 1; when closed, the underside of the bottom bar 2 faces the lower edge 58 of the opening with a gap 55 remaining, and the underside of the bottom bar 2 is provided with a gap sealing material 33 that seals the gap 55 with the lower edge 58 of the opening, and a heated foam material 35 that seals the gap 55 with the lower edge 58 of the opening in the event of a fire.

Description

[Technical Field]

[0001] The present invention relates to a fire roller blind device that can provide fire protection to an opening in a building. [Background technology]

[0002] In order to prevent the spread of fire in the event of a fire, it is necessary to provide fire resistance to the openings of buildings. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a fire-resistant roller blind device that can impart fire-resistant performance to openings in buildings. [Means for solving the problem]

[0004] In order to achieve the above object, the fireproof roller blind device according to the invention described in claim 1 comprises a roller blind that opens and closes an opening, and a bottom bar attached to the lower end of the roller blind. When closed, the lower surface of the bottom bar faces the lower edge of the opening with a gap between them. The lower surface of the bottom bar is provided with a gap-blocking material that blocks the gap between the lower edge of the opening and the bottom edge, and a heated foam material that blocks the gap between the lower edge of the opening and the bottom edge in the event of a fire. At the same time, downward protrusions are provided on the outside and inside of the underside of the bottom bar. It is characterized by:

[0005] The fireproof roller blind device according to the invention of claim 2 comprises a roller blind that opens and closes an opening, and a bottom bar attached to the lower end of the roller blind, and when closed, the lower surface of the bottom bar faces the lower edge of the opening with a gap between them, and the lower surface of the bottom bar is provided with a gap-blocking material that blocks the gap between the lower edge of the opening and the bottom edge, and a heated foam material that blocks the gap between the lower edge of the opening and the bottom edge in the event of a fire. The gap sealant has a base that is held in a groove formed in the lower surface of the bottom bar, and a fin that extends from the base and faces the heated foam material when closed; The heating foaming material is characterized in that the dimension in the indoor / outdoor direction is larger than the dimension in the indoor / outdoor direction of the base of the gap sealing material. [Effects of the Invention]

[0006] The fireproof roller blind device according to the invention of claim 1 comprises a roller blind that opens and closes an opening, and a bottom bar attached to the lower end of the roller blind. When closed, the lower surface of the bottom bar faces the lower edge of the opening with a gap between them. The lower surface of the bottom bar is provided with a gap-blocking material that blocks the gap between the lower edge of the opening and the bottom edge, and a heated foam material that blocks the gap between the lower edge of the opening and the bottom edge in the event of a fire. At the same time, downward protrusions are provided on the outside and inside of the underside of the bottom bar. This provides fire protection to the opening of the building. Furthermore, the fire-resistant roller blind device of the present invention is easy to use because it can be fitted flat at the bottom, reduces the generation of collision noise when closing, and prevents light leakage.

[0007] The fireproof roller blind device according to the invention of claim 2 comprises a roller blind that opens and closes an opening, and a bottom bar attached to the lower end of the roller blind, and when closed, the lower surface of the bottom bar faces the lower edge of the opening with a gap between them, and the lower surface of the bottom bar is provided with a gap-blocking material that blocks the gap between the lower edge of the opening and the bottom edge, and a heated foam material that blocks the gap between the lower edge of the opening and the bottom edge in the event of a fire. The gap sealant has a base that is held in a groove formed in the lower surface of the bottom bar, and a fin that extends from the base and faces the heated foam material when closed; The heat-foaming material has a larger indoor / outdoor dimension than the base of the gap sealant, providing fire protection to the building opening. Furthermore, the fire-resistant roller blind device of the present invention is easy to use, as it can be fitted flat at the bottom, reduces the generation of impact noise when closing, and prevents light leakage. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a vertical cross-sectional view showing an embodiment of a fire prevention roller blind device of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the fire protection roller screen device. [Figure 3] FIG. 2 is a front view of the fire protection roller screen device as seen from the indoor side. [Figure 4] (a) is a front view of the area around the bottom bar lock as seen from the outside of the room, and (b) is a cross-sectional view taken along the line AA. [Figure 5] FIG. 3 is an enlarged cross-sectional view showing the periphery of a guide member of the fire protection roller screen device. [Figure 6] BB cross-sectional view of FIG. 3. [Figure 7] FIG. [Figure 8] 10A and 10B are front views from the indoor side showing the sequence of locking movements when closing the roller blind. [Figure 9] FIG. 10 is a front view from the indoor side showing the state when the lock is released. [Figure 10] FIG. 1(a) is a cross-sectional view showing the state of the bottom bar when a fire breaks out on the outdoor side of the room, and FIG. 1(b) is a cross-sectional view showing the state of the bottom bar when a fire breaks out on the outdoor side of the room, as a comparative example, when no reinforcing material is provided on the bottom bar. [Figure 11] 10 is a perspective view showing a state in which grommets attached to a fireproof sheet are engaged with slits in a reinforcing member and prevented from coming loose in the event of a fire. FIG. [Figure 12] 1(a) is a front view from the indoor side showing the state of the fire prevention roller blind device in the event of a fire, and FIG. 1(b) is a cross-sectional view taken along the CC line. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figures 1 to 6 show one embodiment of a fire-resistant roller blind device 8 of the present invention. As shown in Figures 1 to 3, this fire-resistant roller blind device 8 is installed in an opening 6 facing the outdoors of a wooden house. As shown in Figures 1 and 2, a window sash (vertical sliding window) 7 is installed on the exterior side of the opening 6, and this fireproof roller blind device 8 is installed on the inner peripheral surface of the four frames 3a, 3b, 3c, 3c provided on the interior side of the window sash 7. The window sash 7 does not have fireproof performance, but by closing the fireproof roller blind device 8 to block the opening 6, it is possible to impart fireproof performance to the opening 6.

[0010] As shown in Figures 1 to 3, this fire-resistant roller blind device 8 has a roller blind 1 attached to the underside of the upper frame 3a, a bottom bar 2 provided at the lower end of the roller blind 1, and guide members 9, 9 attached to the inner surfaces of the left and right frames 3c, 3c. As shown in Figure 1, the roller blind 1 comprises a winding shaft 10 and a box 11 that houses the winding shaft 10. A blocking body 12 made of a non-combustible sheet is wound around the winding shaft 10, and when the winding shaft 10 rotates clockwise in Figure 1, the blocking body 12 is unwound from the winding shaft 10, and when the winding shaft 10 rotates counterclockwise, the blocking body 12 is wound onto the winding shaft 10. The winding shaft 10 is biased by a spring (not shown) so as to rotate in the direction (counterclockwise) in which the closure body 12 is wound up, and the bottom bar 2 is constantly pulled upward by the force of the spring. The closure 12 may be, for example, a glass fiber cloth coated with resin. As shown in Figures 2 and 5, metal eyelets 13 are provided at intervals in the vertical direction on the left and right side edges of the closure 12 to prevent it from coming loose. The lower edge of the closure 12 is fixed to the top of the bottom bar 2 via a fixture 14, as shown in Figure 1.

[0011] Box 11 is made of extruded aluminum alloy and, as shown in Figure 1, has a roughly C-shaped cross section with the underside on the indoor side and the interior side open, and the open section is closed by a removable cover 15. Inside box 11, steel reinforcing members 16a and 16b are provided to surround winding shaft 10. Side panels 17 are attached to the left and right sides of box 11 (see Figure 3). As shown in Figure 1, box 11 has hook-shaped locking portions 18a, 18b formed on the top surface at two positions, one on the outside of the room and one on the inside of the room, facing the outside of the room.The locking portions 18a, 18b are locked from the inside of the room to locking portions 20a, 20b of mounting material 19 attached to the underside of the upper frame 3a, and are attached by fastening with screws 21 from the inside of the room. The mounting material 19 is a long material made from an extruded aluminum alloy, and is fixed to the lower surface of the upper frame 3a by screws 22 from below. The mounting material 19 has shallow grooves formed along its length at two locations on the top surface, one on the outside of the room and one on the inside of the room, and heated foam materials 23 are provided in each of the grooves.

[0012] As shown in Figure 5, the guide member 9 is formed from an extruded aluminum alloy profile with a hollow portion 24. It has a guide member main body 25 and inner and outer guide portions 26a, 26b provided on the inner periphery of the guide member main body 25. The inner and outer guide portions 26a, 26b have guide grooves 27 that guide the longitudinal ends of the bottom bar 2 and slits 28 through which the blocking body 12 is inserted. The slits 28 are slightly wider than the thickness of the blocking body 12 and are sized so that the eyelets 13 do not fall out. The outdoor guide portion 26a is formed separately from the guide member main body 25 and is detachable. By removing the outdoor guide portion 26a, the side edge of the blocking body 12 can be easily inserted or removed from the guide member 9. The guide member body 25 has shallow grooves formed along the longitudinal direction at two locations on the outer peripheral side, one on the indoor side and one on the indoor side, and a heating foam material 29 is provided in each of the grooves.

[0013] As shown in Figure 5, a steel reinforcing member 30 is provided within the hollow portion 24 of the guide member 9 along the longitudinal direction of the guide member 9, spanning the entire length of the guide member 9. The reinforcing member 30 is composed of two members, an exterior member 30a and an interior member 30b, and has a slit 31 formed on the inner periphery through which the blocking body 12 is inserted. The width S of the slit 31 of the reinforcing member 30 is adjusted to a dimension that allows the blocking body 12 to move up and down smoothly and prevents the eyelets 13 from coming loose, and the reinforcing member 30 is then fixed to the frame 3c together with the guide member main body 25 with screws 32 from the inner periphery.

[0014] As shown in Figures 4 and 6, the bottom bar 2 is formed from an extruded aluminum alloy member having a hollow portion 32. Protrusions 54a, 54b are formed on the underside of the bottom bar 2 on the outdoor and indoor sides, and when the roller blind 1 is fully closed, a gap 55 is left between the tips of the protrusions 54a, 54b and the upper surface 58 of the lower frame 3b (the lower edge of the opening). The size of the gap 55 is set to 1 mm. A gap sealant 33 is provided at a position adjacent to the outdoor side of the indoor-side protrusion 54b, and the gap 55 is sealed with the gap sealant 33. The gap sealant 33 has a base 33a that is held in a groove formed in the underside of the bottom bar 2, and a soft fin piece 33b that extends obliquely downward from the base 33a to the outdoor side. The gap sealant 33 is made of olefin-based elastomer (TPO), which has excellent heat resistance and flexibility. Furthermore, a heat-foaming material 35 is provided between the protrusion 54a on the outside of the underside of the bottom bar 2 and the gap sealing material 33, while being held in the groove 34. The gap sealing material 33 and the heat-foaming material 35 are provided continuously over the entire length of the bottom bar 2.

[0015] As shown in FIG. 3, a lock 5 is provided in the center of the bottom bar 2 in the longitudinal direction to fix the bottom bar 2 to the lower frame 3b. As shown in Figures 4 and 7, the lock 5 is composed of an outer part 36 that is attached to the exterior surface of the bottom bar 2 and abuts against it, and an inner part 37 that is attached to the interior surface of the bottom bar 2 and abuts against it. A sickle 38 is rotatably mounted on the outer part 36 and supported on an axis 39 extending in the indoor / outdoor direction. An operating unit 40 is rotatably mounted on the inner part 37 and on an axis 41 extending in the indoor / outdoor direction. The sickle 38 and operating unit 40 are linked together by an arm 42 that protrudes from the sickle 38 toward the interior and engages with a protrusion 43 on the operating unit 40 (see Figure 4(b)). The sickle 38 and operating unit 40 are biased by a spring 44 so that the sickle 38 protrudes directly downward (see Figure 7(a)).

[0016] As shown in Figure 4, the lower frame 3b has a hole 45 dug into its flat upper surface to receive the sickle 38 of the lock 5, and the lock receiver 4 is attached to the upper surface of the frame 3b from above the hole 45 with a screw 46. The lock receiver 4 is a plate-like member made of a thin metal plate with a thickness of 1.2 mm, and as shown in Figures 7(a) and 8, it has a square hole 47 formed therein to engage the sickle 38, and a hole cover 48 that covers the hole 45 in the frame 3b from the inside. As shown in FIG. 4, the bottom bar 2 has a notch 57 formed in the area facing the lock receiver 4 of the protrusion 54a on the exterior side of the room.

[0017] Figure 8 shows the movement of the lock 5 when closing the roller blind 1. When the bottom bar 2 is slid downward against the force of the spring, as shown in Figure 8(a), the inclined portion 49 formed on the underside of the sickle 38 comes into contact with the edge 47a of the square hole 47 of the lock receiver 4, and then, as shown in Figure 8(b), as the bottom bar 2 descends, the sickle 38 rotates counterclockwise and passes through the square hole 47 of the lock receiver 4 and enters the hole 45 in the frame 3b. When the bottom bar 2 is lowered to the bottom, as shown in Figure 8(c), the force of the spring 44 causes the sickle 38 to return to its original position, and the sickle 38 engages with the back side of the lock receiver 4, locking the bottom bar 2 so that it does not separate from the frame 3b. In this way, the fire-resistant roller blind device 8 is designed to automatically lock when the roller blind 1 is closed. When opening the roller blind 1, as shown in Figure 9, the operating part 40 provided on the inside of the room is operated with a finger to rotate the sickle 38 to a position where it can be removed from the square hole 47 of the lock receiver 4, thereby releasing the lock.

[0018] As shown in Figure 4, this fire-resistant roller blind device 8 is designed so that even when the bottom bar 2 is lowered all the way down, there is a gap 55 between the underside of the bottom bar 2 and the lower edge 58 of the opening, and a soft gap-blocking material 33 is provided on the underside of the bottom bar 2, which prevents the bottom bar 2 from hitting the lower edge 58 of the opening when the blind is closed, thereby preventing the generation of a collision sound. In addition, because the gap 55 is blocked by the gap-blocking material 33, light does not leak through the gap 55.

[0019] Furthermore, although this fireproof roller blind device 8 has the function of locking the bottom bar 2 in the closed position, there is no lower frame to receive the bottom bar 2 on the upper surface of the lower frame 3b, and only a very thin lock receiver 4 is attached, and the lower part fits flat, making it easy to clean and convenient to use.

[0020] As shown in Figure 6, a steel reinforcing member 50 is provided longitudinally within the hollow portion 32 of the bottom bar 2. The reinforcing member 50 has a U-shaped cross section that is open at the top, with opposing vertical walls 51, 51 positioned close to the exterior and interior walls of the hollow portion 32, and a horizontal wall 52 abutting against the lower wall of the hollow portion 32 and attached by screws 53 from below. The reinforcing member 50 is divided into left and right halves at the position of the lock 5.

[0021] Figure 10(a) shows the state of the bottom bar 2 when a fire breaks out outside the room, and Figure 10(b) is a comparative example in which no reinforcing material 50 is provided on the bottom bar 2, showing the state of the bottom bar 2 when a fire breaks out outside the room. The bottom bar 2 is restrained at both the left and right ends by guide members 9, 9 and at the center by lock 5. Therefore, in the comparative example in which reinforcing material 50 is not provided, as the bottom bar 2 is heated by the heat of the fire and expands, the unrestrained part of the bottom bar 2 (the part between the lock 5 and the guide members 9, 9) warps and bulges toward the heated surface (outside the room), as shown in Figure 10(b), and there is a risk that the bottom bar 2 will separate from the top surface of the frame 3b and create a through hole. In contrast, in this embodiment, a reinforcing member 50 is provided inside the hollow portion 32 of the bottom bar 2, which suppresses warping of the bottom bar 2 as shown in Figure 10(a). This prevents a through hole from forming between the bottom bar 2 and the frame 3b.

[0022] Figure 12 shows the state of this fire screen device 8 in the event of a fire. As shown in the figure, the gap sealing material 33 (see Figures 4 and 6) that seals the gap 55 between the underside of the bottom bar 2 and the lower edge 58 of the opening is not fire-resistant (heat-resistant temperature 160°C) and will burn to ash in the event of a fire, but the heated foam material 35 attached to the underside of the bottom bar 2 foams and expands due to the heat of the fire, sealing the gap 55 between the bottom bar 2 and the lower edge 58 of the opening, thereby preventing flames from communicating between the bottom bar 2 and the lower edge 58 of the opening.

[0023] Furthermore, as shown in Figures 1 and 2, in this fire screen device 8, heated foam materials 23, 29 are provided between the upper frame 3a and the mounting material 19 of the box 11, and between the left and right frames 3c, 3c and the guide members 9, 9. In the event of a fire, these heated foam materials 23, 29 foam and expand, sealing the gaps between the upper frame 3a and the mounting material 19 of the box 11, and between the left and right frames 3c, 3c and the guide members 9, 9, thereby preventing flames from spreading between the upper frame 3a and the mounting material 19 of the box 11, and between the left and right frames 3c, 3c and the guide members 9, 9. Furthermore, as shown in Figure 5, this fire screen device 8 has a steel reinforcing member 30 provided in the hollow portion 24 of the left and right guide members 9, 9, and the reinforcing member 30 has slits 31 formed in it that are sized to prevent the eyelets 13 provided on the side edges of the blocking body 12 from coming out.As a result, even if the blocking body 12 is bent toward the outside or inside of the room due to wind pressure during a fire, as shown in Figure 11, the eyelets 13 will get caught in the slits 31 of the reinforcing member 30, preventing the side edges of the blocking body 12 from coming out of the guide members 9, thereby preventing flames from communicating between the blocking body 12 and the guide members 9.

[0024] As described above, the fire screen device 8 of this invention comprises the roller blind 1 that opens and closes the opening 6, and the bottom bar 2 attached to the lower end of the roller blind 1. When closed, the underside of the bottom bar 2 faces the lower edge 58 of the opening, leaving a gap 55. The underside of the bottom bar 2 is provided with a gap sealant 33 that seals the gap 55 with the lower edge 58 of the opening, and a heated foam material 35 that seals the gap 55 with the lower edge 58 of the opening in the event of a fire (see Figures 4, 6, and 12), thereby providing fire protection to the opening in a building. Moreover, the fire roller blind device 8 of this invention is easy to use, as it can be fitted flat at the bottom, reduces collision noise when closed, and prevents light leakage. This fire-resistant roller blind device 8 has guide members 9, 9 on both the left and right sides of the opening 6 to guide the roller blind 1 and bottom bar 2 (see Figures 2 and 5), which prevents flames from spreading from the sides, thereby improving fire resistance. The bottom bar 2 is always pulled upward, and when the bottom bar 2 is lowered to the closed position, the lock 5 on the bottom bar 2 engages with the lock receiver 4 on the lower edge 58 of the opening and locks it (see Figure 8), which reliably prevents the generation of impact noise when closing and further improves fire resistance. The bottom bar 2 is provided with a notch 57 in the area facing the lock receiver 4 (see FIG. 4), which prevents the bottom bar 2 from hitting the lock receiver 4 and generating a collision noise when the door is closed.

[0025] The present invention is not limited to the above-described embodiments. The material and cross-sectional shape of the bottom bar can be changed as appropriate. The size of the gap between the underside of the bottom bar and the lower edge of the opening when closed, and the material and cross-sectional shape of the gap sealant that seals the gap, can also be changed as appropriate. The lower edge of the opening may be formed by the upper surface of the floor rather than the upper surface of the frame. The fire roller blind device of the present invention may be installed on the outdoor side of the sash, or may be used to separate rooms, separate a hallway from a room, or close a closet, etc. [Explanation of symbols]

[0026] 1 Roller blind 2 Bottom Bar 3a,3b,3c Picture frame 4 Lock receiver 5. Rock 6 Opening 7 Window sash 8. Fireproof Roller Screen Device 33 Gap sealing material 35 Heat-foaming material 55 Gap

Claims

1. This fireproof roller screen device is characterized by comprising a roller screen that opens and closes an opening, and a bottom bar attached to the lower end of the roller screen, the underside of which faces the lower edge of the opening with a gap when closed, a gap-blocking material on the underside of the bottom bar that blocks the gap with the lower edge of the opening, and a heating foam material that blocks the gap with the lower edge of the opening in the event of a fire, and downward projections on the outside and inside of the underside of the bottom bar.

2. A fire-resistant roller screen device comprising a roller screen that opens and closes an opening, and a bottom bar attached to the lower end of the roller screen, wherein when closed, the underside of the bottom bar faces the lower edge of the opening with a gap between them, and the underside of the bottom bar is provided with a gap-blocking material that blocks the gap between the lower edge of the opening and the bottom edge of the opening, and a heated foaming material that blocks the gap between the lower edge of the opening in the event of a fire, the gap-blocking material having a base that is held in a groove formed in the underside of the bottom bar and a fin piece that extends from the base and faces the heated foaming material when closed, and the indoor / outdoor dimensions of the heated foaming material are larger than the indoor / outdoor dimensions of the base of the gap-blocking material.

Images