Switchgear

Abstract

To provide an opening / closing device having a fire extinguishing function.SOLUTION: The opening / closing device includes an opening / closing body capable of opening and closing an opening provided in a structure. The opening / closing device includes a fire extinguishing sheet capable of ejecting a fire extinguishing agent when a temperature of the atmosphere reaches a predetermined temperature. The fire extinguishing sheet is provided on a front face and / or a rear face of the opening / closing body and is configured to appear and disappear in conjunction with an opening / closing operation of the opening by the opening / closing body.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an opening and closing device, and more particularly to an opening and closing device having a fire extinguishing function for a fire in the vicinity of an opening. [Background technology]

[0002] Conventionally, a slat-type shutter device having a shutter curtain made of multiple connected long metal plates called slats has been known as one type of opening and closing device installed at entrances and exits of buildings such as buildings, or in passageways inside buildings. Some slat-type shutter devices have a fire prevention function in the event of a fire. Patent Document 1 discloses a fire shutter device that obtains a fire prevention function by providing a first fire-resistant sheet and a second fire-resistant sheet made of non-combustible sheets on the back side of the shutter curtain that opens and closes the opening, so that they can be opened and closed in the same way as the shutter curtain. Furthermore, Patent Document 2 discloses an opening and closing device in which a cover body is attached to the rear side of the slats that make up the shutter curtain, forming a closed space between the slats, and a heat-shielding agent that foams and expands due to heat in the event of a fire is applied to the closed space, and the heat-shielding agent foams and expands in the event of a fire, thereby achieving a fire prevention effect. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-153454 [Patent Document 2] Japanese Patent Application Laid-Open No. 2017-115511 Summary of the Invention [Problem to be solved by the invention]

[0004] However, according to Patent Documents 1 and 2, although the devices have a fire prevention function, they do not have a fire extinguishing function that can actively extinguish a fire, so in the event of a fire, fire extinguishing equipment such as a sprinkler, mist sprayer, or fire extinguisher installed near the opening is required. In order to solve the above problem, the present invention aims to provide an opening and closing device with a fire extinguishing function. [Means for solving the problem]

[0005] As a configuration of an opening and closing device for solving the above-mentioned problems, there is provided an opening and closing device having an opening and closing body capable of opening and closing an opening provided in a structure, and capable of ejecting a fire extinguishing agent when the temperature of the atmosphere reaches a predetermined temperature, On the front and rear sides, or on the rear side A fire extinguishing sheet provided, The rear surface of the fire extinguishing sheet attached to the rear side of the opening and closing body and a protective sheet that is superimposed on the opening and closing body and protects the fire extinguishing sheet from damage, the fire extinguishing sheet and the protective sheet are configured to appear and disappear in the opening in conjunction with the opening and closing operation of the opening body, the protective sheet being a mesh-like material that has fire resistance higher than the operating temperature of the fire extinguishing sheet and does not hinder the ejection of the fire extinguishing agent, or a material that melts or disappears at a temperature lower than the operating temperature of the fire extinguishing sheet. Furthermore, when the opening and closing body closes the opening, it is configured to cover at least the entire exposed area of ​​the opening and closing body that closes the opening. Furthermore, the fire extinguishing sheet is configured to be attached to the opening and closing body. Furthermore, the fire extinguishing sheet is configured to be attached to the opening and closing body via a thermal insulating material. [Effects of the Invention]

[0006] According to the above configurations, it is possible to provide an opening and closing device having a fire extinguishing function. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a plan view of the slat-type shutter device. [Figure 2] FIG. 2 is a vertical cross-sectional view of the shutter curtain and the winding mechanism. [Figure 3] 10A and 10B are diagrams showing other arrangements of fire extinguishing sheets. [Figure 4] FIG. 10 is a schematic diagram showing another installation form of the fire extinguishing sheet. [Figure 5] FIG. 10 is a schematic diagram showing another installation form of the fire extinguishing sheet. [Figure 6] FIG. 10 is a schematic diagram showing another installation form of the fire extinguishing sheet. [Figure 7] FIG. 10 is a schematic diagram showing another installation form of the fire extinguishing sheet. [Figure 8] FIG. 10 is a diagram showing another configuration of the fire extinguishing body. DETAILED DESCRIPTION OF THE INVENTION

[0008] The present invention will be described in detail below through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention, and include configurations that are selectively adopted.

[0009] Fig. 1 is a plan view of a slat-type shutter device, and Fig. 2 is a schematic vertical cross-sectional view of the shutter curtain and winding mechanism. As shown in the figure, a slat-type shutter device 10 (hereinafter sometimes simply referred to as a shutter device) serving as an opening and closing device is installed in an opening 12 formed in a structural body 11. The structural body 11 is, for example, an exterior wall that separates the inside and outside of a structure such as a house, building, warehouse, or factory, or an interior wall that separates the internal space within the structure. The opening 12 is opened in the structural body 11 and is formed as a space that connects the inside and outside.

[0010] The shutter device 10 generally comprises guide rails 20;20 erected at a distance from each other on both sides of the width of the opening 12, a shutter curtain 30 as an opening / closing body that moves along the longitudinal direction of the guide rails 20;20 to open or close the opening 12, a shutter case 14 provided above the opening 12 and the guide rails 20;20, a winding mechanism 50 installed in the storage space inside the shutter case 14, a fire extinguishing sheet 40 provided on the front and rear sides of the shutter curtain 30, and a protective sheet 42 provided over the fire extinguishing sheet 40. Note that in this example, a lightweight shutter is used as an example of the shutter device 10, but the present invention can also be applied to heavy-duty shutters, etc., in which the thickness of slats 31 described below is thicker than that of lightweight shutters and which are used for the purposes of management, fire prevention, and smoke prevention in buildings, factories, warehouses, etc.

[0011] In this specification, the width direction refers to the direction (left and right direction) perpendicular to the opening and closing (up and down) direction of the shutter curtain 30, and the "depth direction" refers to the thickness (front and back) direction of the shutter curtain 30. Furthermore, the "winding direction" refers to the direction in which the shutter curtain 30 rises along the guide rail 20 and opens the opening 12, and the "releasing direction" refers to the direction in which the shutter curtain 30 falls along the guide rail 20 and closes the opening 12.

[0012] As shown in FIG. 1, the guide rails 20;20 are erected with a portion of them buried in the structure body 11 so that their longitudinal direction is perpendicular to the structure body 11. The guide rails 20;20 are hollow members with an internal structure having a roughly U-shaped cross section. The guide rails 20;20 are arranged so that the U-shaped openings face each other. Both widthwise ends of the shutter curtain 30, which will be described later, are inserted into the guide rails 20;20. As a result, the widthwise ends of the shutter curtain 30 are guided in the opening and closing direction (up and down) by the guide rails 20;20.

[0013] 2 is a longitudinal cross-sectional view of the shutter curtain 30 and slats 31. As shown in each figure, the shutter curtain 30 is composed of a plurality of slats 31. Each slat 31 is made of a metal such as steel, stainless steel, or aluminum, and is a plate-like member extending along the width direction of the opening 12. Curved curled portions 32 and 33 are formed at the end (upper end) of each slat 31 in the winding direction and the end (lower end) in the unwinding direction, respectively.

[0014] The curled portion 32 curves radially inward of the cylindrical wheel 52 that constitutes the winding mechanism 50, and engages with the curled portion 33 formed on the slat 31 adjacent in the winding direction. The curled portion 33 curves radially inward of the wheel 52, and engages with the curled portion 32 formed on the slat 31 adjacent in the payout direction. This allows the slats 31 that are adjacent to each other vertically to be rotatably connected to each other.

[0015] A seat plate 35 is engaged with the end of the shutter curtain 30 in the unwinding direction. The seat plate 35 is a plate body that is rectangular in cross section and extends along the width direction of the shutter curtain 30, and is the part that comes into contact with the floor or the ground when the opening 12 is fully closed. The seat plate 35 is set shorter than the width dimension of the slats 31. Specifically, it is set slightly shorter than the dimension between the guide rails 20;20, and its both ends are not swallowed up by the guide rails 20;20.

[0016] Next, we will provide an overview of the winding mechanism 50 that operates the shutter curtain 30 in the winding direction or the unwinding direction. As shown in Figures 1 and 2, the winding mechanism 50 is installed inside the shutter case 14 and is a mechanism that winds up or unwinds the shutter curtain 30. The winding mechanism 50 includes left and right brackets 15;15 that form part of the shutter case 14, a shaft 51 that is installed between the left and right brackets 15;15, wheels 52;52 that are rotatable in the winding direction and the unwinding direction in synchronization with the rotation of the shaft 51, and a motor (not shown) that rotates the shaft 51 in the winding direction or the unwinding direction.

[0017] The shaft 51 is a support pillar extending in the width direction of the guide rails 20, 20, and both ends thereof are rotatably supported by holding means (not shown) provided on the brackets 15, 15. A driven wheel 53 connected to a connecting member 55 such as an endless chain or belt is provided around the axis of one end of the shaft 51. The driven wheel 53 is connected via the connecting member 55 to a driving wheel provided on the output shaft of a motor (not shown), and the rotational force of the motor is transmitted to the shaft 51 via the driving wheel, connecting member 55, and driven wheel 53.

[0018] The wheels 52;52 are cylindrical metal members provided at a predetermined interval from the shaft 51. The wheels 52;52 are fitted onto the shaft 51 via a fitting hole (not shown) opened in the center, and rotate freely around the shaft 51. The wheels 52;52 are connected to each other by a plurality of winding members 54. The winding members 54 are supports extending parallel to the shaft 51, and both ends are fitted into connecting holes (not shown) opened at equal intervals in the circumferential direction around the fitting hole of the wheels 52;52 as the center.

[0019] As shown in Figure 2, the shutter curtain 30 is connected to the wheel 52 by a hanging member 58 fastened to the circumferential surface of the wheel 52. The hanging member 58 is a metal plate with a curved shape that corresponds to the curvature of the circumferential surface of the wheel 52. The hanging member 58 is fastened integrally to the wheel 52 by fastening means such as bolts and nuts through fastening holes opened in the circumferential surface of the wheel 52. A curled connecting portion 58A is formed on the end of the hanging member 58 in the unwinding direction. The connecting portion 58A engages with the curled portion 32 of the slat 31 that is located furthest from the winding direction among the multiple slats 31 that make up the shutter curtain 30.

[0020] The fire extinguishing sheets 40 are provided on the front and rear sides of the shutter curtain 30 when the shutter curtain 30 closes the opening 12. The fire extinguishing sheets 40 are formed into a flexible sheet using an aerosolized potassium compound as the agent, and are configured so that the aerosolized potassium compound, which is the fire extinguishing agent, can be sprayed when the ambient (atmosphere) temperature rises to a predetermined value (e.g., 300°C) or higher due to radiant heat during a fire.

[0021] The fire extinguishing sheet 40 is formed in a rectangular shape that follows the shape of the shutter curtain 30 when viewed in plan, and is attached to match the shape of the shutter curtain 30. For example, one side of the fire extinguishing sheet 40 corresponding to the width dimension of the shutter curtain 30 is fixed to the front and rear surfaces of the main body 34 of the slat 31 located furthest in the rolling-up direction by a fixing means such as an adhesive. Except for this fixed portion, the fire extinguishing sheet 40 is in a free state, not fixed to the shutter curtain 30. In other words, the fire extinguishing sheet 40 is in a state of being suspended from the slat 31.

[0022] The fire extinguishing sheet 40 is attached to the shutter curtain 30 as described above, and the dimensions in the width direction and the winding direction may be set so as to cover the entire front and rear sides of the opening 12 when the shutter curtain 30 closes the opening 12. The fire extinguishing sheet 40 may have a size that covers at least the area that is exposed and visible to the outside when the shutter curtain 30 closes the opening 12, in other words, the entire area excluding the area that is enclosed within the guide rails 20;20.

[0023] As shown in Figure 2(a), the protective sheet 42 is provided on the rear side of the shutter curtain 30 and is a member for preventing the slats 31 from coming into contact with the fire extinguishing sheets 40 on the front and rear sides when the shutter curtain 30 is rolled up. The protective sheet 42 may be formed, for example, from a sheet-like member such as a mesh or film that is highly fire-resistant and breathable. The protective sheet 42 is formed, for example, in a rectangular shape of approximately the same size as the fire extinguishing sheet 40 so as to cover the entire surface of the fire extinguishing sheet 40, and is attached to the main body 34 of the slat 31 to which the fire extinguishing sheet 40 is fixed, overlapping the fire extinguishing sheet 40, by a fixing means such as an adhesive.

[0024] The aforementioned fire resistance means that the sheet can withstand temperatures higher than the operating temperature of the fire extinguishing sheet 40. Furthermore, the highly breathable mesh size means that the fire extinguishing sheet 40 can be activated in the event of a fire and the size of the mesh does not prevent the fire extinguishing agent from being sprayed. It goes without saying that the protective sheet 42 is strong enough to prevent the slats 31 from coming into contact with the fire extinguishing sheet 40 when the shutter curtain 30 is rolled up, and is flexible enough to accommodate deformation during roll-up.

[0025] Furthermore, the protective sheet 42 is not limited to a mesh-like shape, and may be a sheet or film with no openings to protect the fire extinguishing sheet 40. In this case, the protective sheet 42 should be made of a material that melts or disappears due to the heat of a fire at a temperature lower than the operating temperature of the fire extinguishing sheet 40, allowing the surface of the fire extinguishing sheet 40 to be exposed.

[0026] Furthermore, although the entire rear side of the fire extinguishing sheet 40 is covered by one protective sheet 42, this is not limited to this. For example, the protective sheet 42 may be in the form of a strip of a predetermined width, and the strip-shaped protective sheet 42 may be provided at predetermined intervals in the width direction of the shutter curtain 30 so as to reach from one end of the shutter curtain 30 to the other end in the opening and closing direction.

[0027] In this way, by placing the protective sheet 42 on top of the rear fire extinguishing sheet 40, it can be interposed between the rolled up front and rear fire extinguishing sheets 40;40 together with the shutter curtain 30, as shown in Figure 2(a), thereby preventing a decrease in the fire extinguishing effect in the event of a fire due to prior damage to the fire extinguishing sheets 40;40.

[0028] Furthermore, by attaching the fire extinguishing sheets 40;40 and the protective sheet 42 to the shutter curtain 30, a mechanism for winding up and unwinding the fire extinguishing sheets 40;40 and the protective sheet 42 is no longer necessary, and the fire extinguishing sheets 40;40 and the protective sheet 42 can be automatically positioned and stored as the shutter curtain 30 opens and closes.

[0029] When the fire extinguishing sheets 40; 40 and the protective sheet 42 are fixed to the slats 31 with adhesive, it is advisable to use a heat-resistant adhesive to prevent the fire extinguishing sheets 40 from falling off due to heat or aging before they reach their operating temperature.

[0030] The operation of the shutter device configured as described above will be described below. As shown in Fig. 2(a), when the shutter curtain 30 opens the opening 12 (fully open state), the motor is driven and controlled by operating a control panel (not shown) to rotate the shaft 51 in the unwinding direction, which causes the wheel 52 to rotate in response to the rotation of the shaft 51, and the shutter curtain 30 stacked on the outer circumferential surface of the wheel 52 is unwound sequentially together with the fire extinguishing sheets 40;40 and the protective sheet 42. Then, as shown in Fig. 2(b), the wheel 52 continues to rotate in the unwinding direction, and the entire opening 12 is closed by the shutter curtain 30 (fully closed state), and the fire extinguishing sheets 40;40 are disposed on the front and rear sides of the shutter curtain 30.

[0031] 2(b) in which the shutter curtain 30 closes the opening 12 (fully closed state), when the motor is driven and controlled in the reverse direction and the shaft 51 rotates in the winding direction, the wheel 52 rotates in response to the rotation of the shaft 51, and the shutter curtain 30, together with the fire extinguishing sheets 40 and the protective sheet 42, is gradually wound up along the outer circumferential surface of the wheel 52, opening the opening 12. Then, as shown in FIG. 2(a), when the wheel 52 continues to rotate in the winding direction and the shutter curtain 30 is wound up to a length equal to or greater than the circumferential length of the wheel 52, the shutter curtain 30 wound up in the second and subsequent revolutions is wound up together with the fire extinguishing sheets 40 and the protective sheet 42 while being stacked on top of the shutter curtain 30 that was wound up together with the fire extinguishing sheets 40 and the protective sheet 42 during the first revolution, and the entire opening 12 is opened (fully open state).

[0032] The operation of the fire extinguishing sheet will be explained below. As shown in Fig. 2(b), assume that a fire has broken out on the front side of the shutter curtain 30 when the shutter curtain 30 is closed. When the temperature of the front side of the shutter curtain 30 reaches approximately 300°C, the fire extinguishing sheet 40 attached to the front side of the shutter curtain 30 comes into action, and the extinguishing agent is forcefully ejected, and the ejected extinguishing agent floats in the space in front of the shutter curtain 30 in the form of smoke. The floating extinguishing agent reacts with oxygen and hydrogen to suppress the combustion cycle of the fire, thereby extinguishing the fire that has broken out on the front side of the shutter curtain 30 and preventing the fire from spreading.

[0033] Although the winding mechanism 50 in the above embodiment is an electric winding mechanism 50 having a motor, a manual winding mechanism using a biasing means such as a coil spring inserted around the axis of the shaft 51 may also be used.

[0034] Fig. 3 is a diagram showing another embodiment of the arrangement of the fire extinguishing sheet 40. In the above embodiment, the fire extinguishing sheet 40 is provided so as to directly overlap the front and rear sides of the shutter curtain 30, but as shown in Fig. 3, a heat insulating material 44 may be interposed between the shutter curtain 30 and the fire extinguishing sheet 40.

[0035] The heat insulating material 44 is, for example, a sheet-like member for suppressing heat transfer from one surface side to the other surface side. It is preferable that the insulating material 44 be flexible enough to follow the deformations caused by the winding and unwinding of the shutter curtain 30, and that the material and thickness be set so that when the temperature on one side reaches the operating temperature of the fire extinguishing sheet 40, the temperature on the other side will be lower than this.

[0036] The heat insulating material 44 is formed, for example, into a rectangular shape of approximately the same size as the fire extinguishing sheet 40 so as to cover the entire area of ​​the fire extinguishing sheet 40 between the shutter curtain 30 and the sheet, and is attached by a fixing means such as an adhesive to the main body 34 of the slat 31 to which the fire extinguishing sheet 40 is fixed. Then, the fire extinguishing sheet 40 is placed on top of the heat insulating material 44 on the front side of the shutter curtain 30, and the fire extinguishing sheet 40 and the protective sheet 42 are placed on top of the heat insulating material 44 on the rear side.

[0037] In this way, by interposing the insulating material 44 between the shutter curtain 30 and the fire extinguishing sheets 40, 40, malfunction of the fire extinguishing sheets 40 can be prevented. For example, suppose the shutter device 10 is installed in the middle of a passageway, and the passageway is blocked by the shutter curtain 30 due to a fire. The fire occurs on the front side of the shutter curtain 30. In such a case, the rear side of the shutter curtain 30 is the passageway side for evacuees and others. When the front side of the shutter curtain 30 reaches a predetermined temperature due to the heat of the fire, the fire extinguishing agent is ejected from the front fire extinguishing sheet 40. However, if the insulating material 44 is not present, the heat may be transferred through the slats 31, causing the rear fire extinguishing sheet 40 to function. Therefore, by interposing the insulating material 44 between the shutter curtain 30 and the fire extinguishing sheet 40, malfunction of the fire extinguishing sheet 40 on the side not affected by the fire can be prevented. If the direction of fire outbreak can be predicted to some extent, the heat insulating material 44 may be provided on either the front side or the rear side of the slat 31.

[0038] In the above embodiment, the fire extinguishing sheet 40 is attached to the shutter curtain 30, but it may also be attached to, for example, the hanging member 58 that constitutes the winding mechanism 50 together with the shutter curtain 30. Also, the fire extinguishing sheet 40 is configured to utilize the winding mechanism 50 of the shutter curtain 30 to wind and unwind the fire extinguishing sheet 40 and the accompanying protective sheet 42 and insulating material 44 together with the shutter curtain 30, but the present invention is not limited to this.

[0039] In the above embodiment, the winding mechanism 50 is described as winding up and unwinding the fire extinguishing sheet 40 and the accompanying protective sheet 42 and insulating material 44 together with the shutter curtain 30, but the fire extinguishing sheet 40 and the accompanying protective sheet 42 and insulating material 44 may also be wound up and unwinded by another winding mechanism.

[0040] FIG. 4 is a schematic diagram showing another installation form of the fire extinguishing sheet 40. As shown in FIG. 4, the fire extinguishing sheet 40 can be configured as a fire extinguishing unit 80 including, for example, a winding device. In the following description, the fire extinguishing sheet 40 alone, the fire extinguishing sheet 40 combined with a protective sheet 42, or the fire extinguishing sheet 40 combined with a protective sheet 42 and a thermal insulating material 44 will all be collectively referred to as fire extinguishing element A. The fire extinguishing element unit 80 can be configured to include the fire extinguishing element A, a winding shaft 82 that winds up the fire extinguishing element A, a bearing (not shown) that rotatably supports the winding shaft 82, a winding spring (not shown) that applies a biasing force to the winding shaft in the direction in which the winding shaft 82 winds up the fire extinguishing element A, and a case 84 that houses these components.

[0041] The fire extinguishing body A is formed, for example, in a rectangular shape that can cover the entire area of ​​the opening 12 in which the shutter device 10 is provided, and is housed in the case 84 in a state where it is wound around the winding shaft 82 by the biasing force of the winding spring.

[0042] As shown in Fig. 4, the fire extinguisher units 80 are arranged, for example, on the front and rear sides of the shutter curtain 30 within the shutter case 14. Each of the fire extinguisher units 80 on the front and rear sides is fixed within the shutter case 14 so that the winding shaft 82 of the fire extinguisher A is parallel to the axis of the shaft 51 of the winding mechanism 50 of the shutter curtain 30. The fire extinguisher A wound around the winding shaft 82 is pulled out from each of the fire extinguisher units 80 on the front and rear sides, and one pulled-out side (hereinafter referred to as the pulled-out end) is fixed to the front and rear sides of the base plate 35 by fixing means not shown, thereby being incorporated into the shutter device 10.

[0043] The operation of the fire extinguishing unit 80 will be described below. When the opening is closed by the shutter curtain 30 as shown in Fig. 4(a) from a state in which the opening is open as shown in Fig. 4(b), the shutter curtain 30 is unwound, whereby the fire extinguishing element A is pulled out from the winding shaft 82, and the fire extinguishing element A having extinguishing function is disposed on the front and rear sides of the shutter curtain 30. When the opening is opened from a state in which the shutter curtain 30 has closed the opening as shown in Fig. 4(a) to a state in which the shutter curtain 30 has closed the opening as shown in Fig. 4(b), the shutter curtain 30 is wound up, whereby the pulling force on the fire extinguishing element A by the seat plate 35 is released, and the fire extinguishing element A is wound up around the winding shaft 82 without sagging due to the biasing force of the winding spring.

[0044] 5 is a schematic diagram showing another installation form of the fire extinguishing sheet 40. As shown in the figure, the fire extinguishing unit 80 does not need to be housed inside the shutter case 14, but may be attached to the underside of the shutter case 14, etc.

[0045] FIG. 6 is a schematic diagram showing another installation configuration of the fire extinguishing sheet 40. When the fire extinguishing element A is provided on the front and rear sides of the shutter curtain 30, two fire extinguishing unit 80 are provided on the front and rear sides of the shutter curtain 30. However, as shown in the same figure, it is also possible to provide the fire extinguishing element A on both the front and rear sides of the shutter curtain 30 using a single fire extinguishing unit 80. In this case, a roller 86 extending along the width direction of the seat plate 35 is rotatably provided on the underside of the seat plate 35, and the fire extinguishing element A pulled out from the fire extinguishing unit 80 is attached to the underside of the shutter case 14 via the roller 86. Even with this configuration, the fire extinguishing element A can be wound up and pulled out in conjunction with the winding and unwinding of the shutter curtain 30 without sagging.

[0046] FIG. 7 is a schematic diagram showing another installation configuration of the fire extinguishing sheet 40. As shown in FIG. 7(a), the base plate 35 may be formed as a hollow box, and the base plate 35 may be provided with a fire extinguishing element A, a winding shaft 82 for winding up the fire extinguishing element A, a bearing (not shown) for rotatably supporting the winding shaft 82, and a winding spring (not shown) for applying a biasing force to the winding shaft 82 in the direction in which the winding shaft 82 winds up the fire extinguishing element A, thereby forming a fire extinguishing element unit 80. In other words, the single fire extinguishing element unit 80 described above may be attached to the lower end of the slat 31 in place of the plate-shaped base plate 35. In this case, the drawn-out end of the fire extinguishing element A may be fixed to the underside of the shutter case 14 or the like by a fixing means (not shown). Although FIG. 7(a) illustrates an example in which the fire extinguishing element A is provided on the rear side of the shutter curtain 30, it may also be provided on the front side.

[0047] Furthermore, as shown in Figure 7(b), by storing two fire extinguishing units 80 in a hollow box-shaped seat plate 35, it is possible to provide fire extinguishing elements A on the front and rear sides of the shutter curtain 30. Even when the fire extinguishing unit 80 is configured as shown in Figures 7(a) and (b), the fire extinguishing element A can be wound up and pulled out in conjunction with the winding up and pulling out of the shutter curtain 30 without sagging.

[0048] 8 is a diagram showing another configuration of the fire extinguisher A. In the above embodiment, the fire extinguisher A is in the form of a single sheet that can be wound around the winding shaft 82 and fed out, but it may also be formed to be foldable by accordion folding as shown in the same figure.

[0049] As shown in Figure 8, by folding the fire extinguisher A in an accordion-like manner, it becomes possible to expand and contract in the direction in which it is folded. In this case, for example, the shape of the base plate 35 is made to be a box-like shape with an opening at the top, and the fire extinguisher A folded in an accordion-like manner is housed inside this. Then, the bottommost folded piece is fixed to the base plate 35 by adhesive or the like, and the topmost folded piece is fixed to the underside of the shutter case 14 by adhesive or the like.

[0050] In the accordion-folded configuration, the bottom and top pieces move apart, causing the curtain to expand in the folding direction, and the bottom and top pieces move closer together, causing the curtain to contract in the folding direction. Therefore, as shown in FIG. 8(b), when the shutter curtain 30 is rolled up and the shutter curtain 30 is unrolled from a state in which the opening 12 is open, the base plate 35 gradually moves away from the shutter case 14. In conjunction with this movement, the fire extinguishing element A is deployed and extends. Then, as shown in FIG. 8(a), when the shutter curtain 30 completely closes the opening 12, the fire extinguishing element A covers the entire area of ​​the shutter curtain 30 on the front and rear sides of the shutter curtain 30.

[0051] 8(a), the shutter curtain 30 is unrolled and then wound up from a state in which the opening 12 is closed, so that the seat plate 35 gradually approaches the shutter case 14. In conjunction with this approach, the fire extinguishing element A is folded and gradually contracted. Then, as shown in FIG. 8(b), when the shutter curtain 30 is wound up and the opening 12 is completely opened, the fire extinguishing element A is stored within the seat plate 35 in its most folded state.

[0052] In this way, by making the fire extinguisher A foldable, a winding mechanism for winding up the fire extinguisher A is not required, and the fire extinguisher A can be easily provided to the shutter device 10. Note that the form of the fire extinguisher A that provides a structural extension function is not limited to accordion folding, and may be a structure that allows extension and contraction, such as a pantograph or honeycomb.

[0053] As described above, by providing a fire extinguishing sheet that sprays a fire extinguishing agent when the ambient temperature reaches a predetermined temperature on both or either of the front and rear surfaces of the opening / closing body, it is possible to automatically and proactively extinguish a fire near the opening / closing device and suppress the spread of the fire. Furthermore, the application of the fire extinguishing sheet to the opening / closing body may be selectively performed on both or either of the front and rear surfaces of the opening / closing body depending on the location where the opening / closing device is installed, such as an entrance or exit of a building or a passageway inside a building. Furthermore, the protective sheet and insulating material to be overlaid on the fire extinguishing sheet may also be selectively provided as appropriate depending on the location.

[0054] In the above description, the fire extinguishing sheet 40 is described as being attached to the opening / closing body, but this is not limited to this and it may be attached to each component that makes up the opening / closing device. For example, by attaching the fire extinguishing sheet 40 so as to cover the outer surface of the shutter case 14 that houses the opening / closing body or the surface of the guide rails 20, 20 that guide the opening and closing movement of the opening / closing body, the fire extinguishing function can be strengthened.

[0055] In the above embodiment, the shutter curtain 30 is composed of a plurality of slats 31, but the shutter curtain 30 can also be a panel curtain made up of a combination of a plurality of flat panels, a sheet curtain made up of a sheet of non-flammable resin or the like, or a curtain made up of a combination of these components. Also, while a slat-type shutter device has been used as the opening / closing device to be installed in the opening, based on the concept described above, the fire extinguishing sheet may also be applied to an over-sliding door, a door used for people to enter and exit, or the like.

[0056] According to the opening / closing device having each of the above configurations, when the opening / closing body closes the opening, it can automatically provide the opening with a fire extinguishing function and suppress the spread of the fire. Furthermore, if the opening / closing body is configured so that the fire extinguishing sheet covers at least the entire exposed portion of the opening / closing body that closes the opening when the opening / closing body closes the opening, it can effectively extinguish a fire near the opening. Furthermore, if the fire extinguishing sheet is configured to be attached to the opening / closing body, it can easily appear and disappear into the opening in conjunction with the opening and closing movement of the opening / closing body. Furthermore, if a protective sheet is provided over the fire extinguishing sheet to protect it, it can prevent damage to the fire extinguishing sheet. Furthermore, if the fire extinguishing sheet is configured to be attached to the opening / closing body via a thermal insulating material, it can prevent heat from being transferred from one side of the opening / closing body to the other side through the opening / closing body. [Explanation of symbols]

[0057] 10 shutter device, 12 opening, 14 shutter case, 20 Guide rail, 30 Shutter curtain, 31 Slat, 40 Fire extinguishing sheet, 42 Protective sheet, 44 Insulation material.

Claims

1. An opening and closing device including an opening and closing body capable of opening and closing an opening provided in a structure, a fire extinguishing sheet that can spray a fire extinguishing agent when the ambient temperature reaches a predetermined temperature and is provided on the front side and rear side or the rear side of the opening / closing body; a protective sheet provided on the rear surface of the fire extinguishing sheet provided on the rear surface side of the opening / closing body to protect the fire extinguishing sheet from damage; The fire extinguishing sheet and the protective sheet can appear and disappear from the opening in conjunction with the opening and closing operation of the opening body, The protective sheet is a mesh member having a fire resistance higher than the working temperature of the fire extinguishing sheet and not interfering with the ejection of the fire extinguishing agent, or An opening and closing device characterized in that the member melts or disappears at a temperature lower than the operating temperature of the fire extinguishing sheet.

2. The opening and closing device according to claim 1, wherein the fire extinguishing sheet covers at least the entire exposed area of ​​the opening and closing body that closes the opening when the opening is closed.

3. 3. The opening and closing device according to claim 1, wherein the fire extinguishing sheet is provided alongside the opening and closing body.

4. 4. The opening and closing device according to claim 1, wherein the fire extinguishing sheet is provided on the opening and closing body via a heat insulating material.

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