Building shutter device

Abstract

To provide a shutter device for buildings capable of preventing a shutter curtain from falling off from a guide rail when the shutter curtain bends due to wind pressure as well as improving the smoke-blocking effect both indoors and outdoors.SOLUTION: The shutter device is configured so that a concave portion 6l, in which a locking portion 6j that locks on a locking receiving portion 2j is formed, is formed on the indoor side of a slat 6 to prevent the shutter curtain from coming off on the indoor side, and a smoke blocking material 10 is placed on the outdoor side of a guide rail 2 in contact with the outdoor side of the shutter curtain to block smoke.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to the technical field of shutter devices for buildings that are installed at openings such as entrances and exits of buildings such as buildings, warehouses, and houses. [Background technology]

[0002] Generally, shutter devices are installed to open and close the entrances and exits of buildings such as buildings. However, with such shutter devices, the shutter curtain, which is guided up and down by guide rails on the left and right sides of the opening, may bend and deform in the indoor / outdoor direction due to wind pressure generated during bad weather such as a typhoon, and may come loose from the guide rail. In addition, if a fire breaks out indoors, there is a risk that smoke will leak out to the outdoors through the gap between the guide groove and the shutter curtain. For example, it has been proposed to provide wind-resistant hooks on both left and right edge portions of the slats that make up the shutter curtain, and to have these hooks engage with locking portions provided on the guide rail when the shutter curtain is bent due to wind pressure, thereby preventing the shutter curtain from coming loose, and to have smoke-blocking material provided on the groove opening edge portion on the outdoor side of the guide rail abut against the outdoor side of the shutter curtain, thereby providing a smoke-blocking function (see, for example, Patent Document 1). However, although the above-mentioned conventional system is effective in preventing the shutter curtain from coming off when subjected to wind pressure and in blocking smoke in the event of a fire, it has the problem of requiring wind-resistant hooks, which increases the number of parts. Therefore, it has been proposed to form a concave portion on the indoor / outdoor surface of the slat, and when the slat bends due to wind pressure, this concave portion will engage with a locking receiving portion provided on the guide rail side to prevent it from coming loose (see Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-116640 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-164852 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of the product formed in Patent Document 2, the convex portion on which the locking receiving portion is formed also serves as a mohair attachment member, and it is therefore proposed to replace this mohair with a smoke-blocking material to provide smoke-blocking functionality.However, if this is done, there are problems such as the distance between the concave portion and the smoke-blocking material becoming greater when the slat bends on the side opposite to the side on which the smoke-blocking material is arranged, thereby reducing the smoke-blocking effect, and these are the issues that the present invention aims to solve. [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, and the invention of claim 1 is a shutter device for a building comprising guide rails provided on the left and right sides of an opening separating the indoors and outdoors, a shutter curtain that opens and closes the opening by being guided up and down with both left and right end edges loosely fitted into the guide grooves of the guide rails, and a winding body that winds up the shutter curtain, wherein the shutter curtain is formed by connecting adjacent slats so that it can swing freely indoors and outdoors, and the shutter curtain is prevented from slipping off the guide rails when it is bent indoors or outdoors due to wind pressure by locking portions formed on the outer left and right end edges of recessed portions provided on one side of the slats in the indoor / outdoor direction, which lock into locking receiving portions provided on a groove side piece on one side of the guide groove in the indoor / outdoor direction, When a smoke blocking material is provided at the groove opening end side portion on the other side of the guide rail in the indoor / outdoor direction to abut against the curtain surface of the shutter curtain on the other side in the indoor / outdoor direction to block smoke, the tilt displacement of the shutter curtain when the shutter curtain is bent in the indoor / outdoor direction and placed in a non-detachable position due to wind pressure is determined based on the locking portion where the locking portion locks with the lock receiving portion, and the indoor / outdoor portion of the shutter curtain abuts against the corner portion of the groove opening end edge of the guide rail, so that the locking portion between the locking portion and the lock receiving portion serves as a tilt reference portion for the shutter curtain tilted in the non-detachable position, and the leading edge of the smoke blocking material abuts against the shutter curtain from the other side in the indoor / outdoor direction of the shutter curtain that faces the tilt reference portion to block smoke. This is a shutter device for a building characterized by the above. [Effects of the Invention]

[0006] By adopting the invention of claim 1, the shutter curtain that has been bent due to wind pressure is prevented from coming loose by the locking portion formed in the recessed portion on one side of the slat in the indoor / outdoor direction engaging with the locking receiving portion provided on the groove side piece on that side of the guide rail, thereby eliminating the need for wind-resistant hooks.However, on the other side of the indoor / outdoor direction opposite to where the recessed portion is formed, the smoke-blocking material abuts against the curtain surface of the shutter curtain to block smoke, so that an excellent smoke-blocking effect can be achieved regardless of whether the shutter curtain is bent in the indoor or outdoor direction. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a schematic front view of a shutter device for a building. [Figure 2] This is a horizontal cross-sectional view of the guide rail insertion portion of the shutter curtain. [Figure 3] This is a rear view of the guide rail insertion portion of the shutter curtain. [Figure 4] (A) and (B) are a side view and a longitudinal cross-sectional view of the recessed portion of the shutter curtain. [Figure 5] (A) (B) (C) are a plan view, a rear view, and a bottom view of the portion where the guide rail of the slat is inserted. [Figure 6] (A)(B)(C)(D) are longitudinal cross-sectional views of the main body portion of the slat, the concave portion, the notch groove portion, and the slippage prevention portion. [Figure 7] (A)(B)(C) is a horizontal cross-sectional view of the guide rail, a horizontal cross-sectional view of the guide rail with the decorative panel installed, and a plan view of the smoke barrier material. [Figure 8] 10A and 10B are horizontal cross-sectional views of the guide rail insertion portion of the shutter curtain when it is bent due to external and internal pressure and is prevented from slipping out. [Figure 9] 10A and 10B are horizontal cross-sectional views of another example of a guide rail. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a shutter device for a building that is installed at an entrance E, which is an opening of a building or the like. The shutter device 1 is configured using various components and devices, such as guide rails 2 provided on both the left and right sides of the entrance E that separates the indoors and outdoors, a shutter curtain 3 that opens and closes the entrance E by being guided up and down (up and down guided) with both left and right end edges fitted into the guide rails 2, a winding drum 4 provided on the ceiling to wind up the shutter curtain 3, and an electric opening and closing device 5 that drives the winding drum 4 to rotate forward and backward to wind and unwind the shutter curtain 3, all of which are conventional.

[0009] The shutter curtain 3 is configured by connecting adjacent vertically elongated (strip-shaped) slats 6 that are long in the left-right direction with each other in an overlapping manner, allowing them to swing freely indoors and outdoors relative to each other. The slats 6 are configured with a main body 6a formed in a flat plate shape that is biased toward the outdoors, and upper and lower connecting parts 6b, 6c that are provided on both the top and bottom of the main body 6a and biased toward the indoors relative to the main body 6a. By overlapping and connecting the upper and lower connecting parts 6b, 6c together, adjacent vertical slats 6 are connected to each other so that they can swing freely indoors and outdoors. Incidentally, the connection structure between adjacent slats 6 is often collectively referred to as an "interlock connection," but recently, a connection structure in which the upper connecting portion 6b is contained within the lower connecting portion 6c is sometimes referred to as an "interlock connection" in the narrow sense, and a connection structure in which the upper connecting portion 6b is contained within the lower connecting portion 6c, as in this embodiment which is often adopted in shutter devices with smoke blocking functions, is sometimes referred to as an "overlapping connection." It goes without saying that the shutter curtain 3 in which the present invention can be implemented may be one in which the slats are connected to each other by any of the various commonly known connection structures. The shutter curtain 3 has both left and right edge portions that are loosely fitted (inner fit) into the guide grooves X formed in the guide rail 2, and the guide rail 2 in this embodiment is configured as a thick extruded member that is integrally formed by extruding steel material. Incidentally, the guide rail 2 is not limited to being an integrally formed extruded member, and it goes without saying that it may also be formed by, for example, bending a plurality of steel plates into a required shape and integrating them by welding or the like.

[0010] The guide rail 2 is configured to include a groove bottom piece 2a that forms the groove bottom surface of the guide groove X, an indoor-side first groove side piece 2b that extends inward in the left-right direction from the indoor-side edge of the groove bottom piece 2a, and an outdoor-side second groove side piece 2c that extends inward in the left-right direction from the outdoor-side edge of the groove bottom piece 2a. In this case, the second groove side piece 2c does not reach the groove opening edge Xy of the guide groove X, but is set to a length that reaches the middle part in the left-right direction of the first groove side piece 2b. A first protruding piece 2e is formed at a left-right intermediate portion of the first groove side piece 2b and protrudes toward the outdoors, positioned left-right inward of a left-right inner edge 2f of the second groove side piece 2c, while a second protruding piece 2g is formed and protrudes toward the indoor side (the first groove side piece 2b side) from the left-right inner edge 2f of the second groove side piece 2c. In other words, the first protruding piece 2e formed on the first groove side piece 2b is biased inward in the left-right direction relative to the second protruding piece 2g formed on the second groove side piece 2c, and the distance between the tip edges 2h, 2i of the first and second protruding pieces 2e, 2g in the indoor / outdoor direction is configured to be the minimum groove width Z of the guide groove X.

[0011] Furthermore, a U-shaped mounting bracket 7 that is open on the indoor side is attached to the inner left-right edge 2f of the second protruding piece 2g, and the inner left-right leg piece 7a of the mounting bracket 7 is configured to be in the same left-right position as the inner left-right edge 2d of the first groove side piece 2b. Incidentally, although the mounting bracket 7 in this embodiment is configured from two members, it may of course be configured from one member. Furthermore, in this embodiment, the indoor and outdoor decorative panels 8, 9 are attached to cover the first groove side piece 2b and the leg piece 7a on the inside in the left-right direction of the mounting bracket 7, and a base 10a of a smoke blocking material 10 (described later) is attached to the outdoor side of the groove inner piece 9a, which is bent so as to fit into the guide groove X of the outdoor decorative panel 9. With this configuration, the smoke blocking material 10 is installed in a state where it is arranged on the groove opening end side of the mounting bracket 7. It goes without saying that the smoke blocking material 10 may also be attached directly to the mounting bracket 7. In this embodiment, the bent corner portions of the groove inner pieces 8a, 9a, which are bent so as to fit into the guide groove X of the indoor and outdoor decorative panels 8, 9, are configured to become the actual groove opening edge portion Xy of the guide groove X.

[0012] As described above, the slats 6 are composed of a flat main body 6a biased toward the outdoor side and upper and lower connecting portions 6b, 6c biased toward the indoor side, and adjacent slats 6 are connected in a continuous series vertically by the above-mentioned overlapping connection in which the upper connecting portion 6b is fitted into the lower connecting portion 6c. In this embodiment, in order to prevent relative lateral shifting between adjacent slats 6 connected vertically, a notch 6d is formed in the upper connecting portion 6a by cutting out the outer left-right edge portion, while a notch groove 6e is formed in the outer left-right edge portion of the lower edge portion 6b so that the portion corresponding to the notch 6d can be bent, and the portion remaining outside the notch groove 6e in the left-right direction becomes a shift prevention piece 6f, which is bent so as to face closely to the inner left-right edge portion (the outer left-right edge portion of the upper connecting portion 6b) 6g of the notch 6d portion of the upper connecting portion 6b with which it is overlapping, thereby preventing lateral shifting between adjacent slats 6 in the left-right direction.

[0013] Furthermore, in the upper and lower connecting portions 6b, 6c of the slat 6 in this embodiment, upper and lower concave half portions 6h, 6i are formed, positioned left-right inward of the notch portions 6d and cutout grooves 6e formed in the upper and lower connecting portions 6b, 6c, and the concave half portions 6h, 6i are formed in approximately the same left-right position at the overlapping connecting portions 6b, 6c to connect adjacent slats 6.As a result, when adjacent slats 6 are connected to each other, the concave half portions 6h, 6i form a common (overlapping, overlapping) integrated concave groove state, constituting the concave portion 6l of the present invention. The recessed portion 6l is fitted within the guide groove X (does not protrude from the guide groove X) in a normal state (usual state) when the shutter curtain 3 is not bent by wind pressure, and the length in the left-right direction is set so that the first protruding piece 2e is loosely fitted into the middle part of the recessed portion 6l in the left-right direction, thereby allowing the slat 6 (shutter curtain 3) to move left-right relative to the guide rail 2 by an amount corresponding to the left-right length of the recessed portion 6l.This is designed to prevent the first protruding piece 2e from easily abutting and interfering with the left and right end edges of the recessed portion 6l in the event that the shutter curtain 3 is biased left-right during daily opening and closing operations, and also because the recessed portion 6l is fitted into the guide groove X, it is not visible at the opening E.

[0014] When the portion of the shutter curtain 3 configured in this manner that is exposed to the opening E is bent in the indoor / outdoor direction due to wind pressure, the left-right outer portion of the shutter curtain 3 that fits loosely into the guide rail 2 will be displaced at an inclination that takes into account the movement in the indoor / outdoor bending direction plus the movement inward in the left-right direction due to the bending.However, if this displacement becomes large, the left-right outer edge of the recessed portion 6l will engage with the left-right outer edge of the first protruding piece 2e, and this engaged state will prevent the slat 6 (shutter curtain 3) from slipping out of the guide groove X by the engagement.Therefore, the left-right outer edge of the recessed portion 6l corresponds to the engagement portion 6j of the present invention, and the left-right outer edge of the first protruding piece 2e corresponds to the engagement receiving portion 2j of the present invention. Incidentally, the locking portion 6j is formed as the end portion of the concave half portions 6h, 6i at the portion where the upper and lower connecting portions 6b, 6c are joined in an overlapping manner, thereby increasing the strength.

[0015] When the shutter curtain 3 is deflected and deformed by wind pressure, and the locking portions 6j are locked with the locking receiving portions 2j to prevent the shutter curtain 3 from coming off, the recessed portions 6l move inward in the left-right direction, but the left-right inner edge 6k of the moved recessed portions 6l is positioned within the guide groove X and is configured not to protrude inward in the left-right direction from the groove opening edge Xy of the guide groove X. In this case, when the shutter curtain 3 is in a normal state where it is not deflected, the first protruding pieces 2e on which the locking receiving portions 2j are formed are fitted into the recessed portions 6l, and when the shutter curtain 3 is deflected from this normal state and the locking portions 6j are locked with the locking receiving portions 2j to prevent the shutter curtain 3 from coming off, the locking portions 6j are quickly and reliably locked to the locking receiving portions 2j because the displacement is from the state where the locking receiving portions 2j are fitted into the recessed portions 6l. Furthermore, in this normal state, the gap S between the tip edge 2h of the first protruding piece 2e that fits into the recessed portion 6l and the recessed portion 6l is set to be larger than the gap K between the connecting portions 6b, 6c and the indoor side of the groove opening edge portion Xy (specifically, the groove inner piece 8a of the indoor side decorative panel 8) (S>K).This prevents the occurrence of problems such as abnormal noise when the shutter curtain 3 swings toward the indoor side during normal opening and closing operations, as the first protruding piece 2e abuts against the recessed portion 6l before the connecting portions 6b, 6c of the slat 6 abut against the indoor side of the groove opening edge portion Xy as they normally do.

[0016] When the shutter curtain 3 is further bent by the wind pressure and the locking portion 6j is locked into the locking receiving portion 2j to prevent it from coming loose, the slat 6 (shutter curtain 3) assumes an inclined position in which the part of the slat 6 that is laterally inward of the concave portion 6l abuts against the Xy portion of the groove opening edge on either the indoor or outdoor side of the guide rail 2, and this inclined position in which it is displaced in the indoor / outdoor direction is an inclined displacement with the locking portion of the locking portion 6j locked into the locking receiving portion 2j acting as a reference point (fulcrum). Furthermore, when the slat 6 is displaced to this inclined position to prevent it from coming loose, the portion where the slat 6 abuts against the groove opening edge Xy of the guide rail 2 is not a portion where the slat thickness (the thickness of the slat 6 in the indoor / outdoor direction) is thinned due to a cutout like the concave portion 6l, but rather a portion of the main body 6a where there is no cutout and the slat thickness is not thinned, so that the load when preventing it from coming loose can be firmly received without reducing strength. Incidentally, this product prevents the shutter curtain 2 from slipping out without using wind-resistant hooks as in the past, which allows the length of the guide rail 2 in the left-right direction to be shortened, contributing to making the guide rail 2 more compact.

[0017] Specifically, when the shutter curtain 3 is bent toward the indoor side due to wind pressure (positive pressure) directed toward the indoor side, the locking portion 6j engages with the locking receiving portion 2j, and as shown in Figure 8(A), the connecting portions 6b, 6c, which are laterally inward of the recessed portion 6l located within the guide groove X, abut against the indoor side groove opening edge portion Xy portion of the guide groove X, i.e., the corner portion 8b portion of the groove opening edge portion Xy of the indoor side decorative panel 8, and the main body portion 6a, which is laterally outward of the recessed portion 6l, abuts against the tip edge portion 2i of the second protruding piece 2g provided on the second groove side piece 2c, laterally outward of the first protruding piece 2e that constitutes the locking receiving portion 2j, creating an inclined anti-slip state. As a result, when the shutter curtain 3 is bent toward the indoor side due to wind pressure directed toward the indoor side, the load applied when preventing it from coming loose is also borne by the first and second groove side pieces 2b, 2c on both the left and right sides of the guide rail 2, which are sandwiched between the part where the locking part 6j locks into the locking receiving part 2j, thereby distributing the load and contributing to increased strength.

[0018] On the other hand, when the shutter curtain 3 is bent toward the outdoors due to wind pressure (negative pressure) directed toward the outdoors, the locking portion 6j engages with the locking receiving portion 2j, and as shown in Figure 8(B), the main body portion 6a, which is laterally inward of the recessed portion 6l located within the guide groove X, abuts against the outdoor side groove opening edge portion Xy portion of the guide groove X, i.e., the corner portion 9b portion of the groove opening edge portion Xy of the outdoor side decorative panel 9, and the connecting portions 6b, 6c, which are laterally outward of the recessed portion 6l, are configured to be in a non-slip state, with the indoor side outer left-right edge portion 6m of the connecting portions 6b, 6c abutting against the first groove side piece 2b, laterally outward of the first protruding piece 2e that constitutes the locking receiving portion 2j. As a result, when the shutter curtain 3 is bent toward the outdoors due to wind pressure blowing toward the outdoors, the load applied when preventing it from coming loose is borne by the first and second groove side pieces 2b and 2c on both the left and right sides of the guide rail 2, sandwiching the part where the locking portion 6j locks into the locking receiving portion 2j, just as in the case of bending toward the outdoors as described above, thereby distributing the load and contributing to increased strength.

[0019] On the other hand, the base 10a of the smoke-blocking material 10 is arranged on the outdoor side of the groove opening edge Xy of the guide groove X, and a pleated portion 10b having rubber elasticity extends from the base 10a toward the back of the groove and toward the indoor side, and the tip edge 10c of the pleated portion 10b is folded back into an approximately U-shape (V-shape), and the tip edge 10c abuts against the flat outdoor side (curtain surface) of the main body 6a, thereby sealing the gap on the outdoor side between the guide rail 2 and the shutter curtain 3, thereby providing a smoke-blocking (smoke-proof) function. In this case, the smoke-blocking material 10 abuts against the shutter curtain 3 on the outdoor side rather than the indoor side where the recessed portion 6l is formed to prevent the shutter curtain 3 from slipping out, and as a result, the smoke-blocking effect caused by the pleated portion 10b of the smoke-blocking material 10 abutting against the shutter curtain 3 can be exerted regardless of the recessed portion 6l, making it an excellent product.

[0020] Furthermore, in this structure, the contact portion of the pleated portion tip edge portion 10c against the main body portion 6a becomes the tilt fulcrum portion when the shutter curtain 3 is deflected and tilted as described above. The locking part is the 2j part. This prevents the pleated portion 10b from changing significantly in its contact position with the main body 6a when the shutter curtain 3 is bent indoors or outdoors due to wind pressure and is prevented from slipping out, allowing for a high level of smoke-blocking functionality.It also allows the pleated portion 10b to be positioned as close as possible to the main body 6a under normal conditions, which allows the width of the guide rail 2 in the indoor / outdoor directions to be made thinner, contributing to making the guide rail 2 more compact.

[0021] In this embodiment configured as described above, the shutter curtain 3, which has been bent due to wind pressure, is prevented from coming loose by the locking portion 6j formed in the recessed portion 6l of the slat 6 engaging with the locking receiving portion 2j formed on the guide rail 2, which eliminates the need for wind-resistant hooks and shortens the left-right length of the guide rail 2, thereby making the guide rail 2 more compact.Furthermore, in this embodiment, the smoke-blocking material 10 blocks smoke by abutting against the surface of the main body 6a of the slat 6 (the shutter curtain surface) on the opposite outdoor side, rather than on the indoor side where the recessed portion 6l is formed, so that an excellent smoke-blocking effect can be achieved whether the shutter curtain 3 is bent indoors or outdoors.

[0022] Furthermore, in this device, a concave portion 6l is formed by the concave halves 6h, 6i provided on the upper and lower connecting portions 6b, 6c biased toward the indoor side of the slat 6, while the smoke-blocking material 10 abuts against the main body portion 6a biased toward the outdoor side of the slat 6 from the outdoor side.As a result, the smoke-blocking material 10 can abut against the curtain surface without being affected by the concave portion 6l on the indoor side, thereby providing an excellent smoke-blocking effect. Furthermore, when the shutter curtain 3 is in its normal state without any deflection, the locking receiving portion 2j is loosely fitted into the recessed portion 6l at a position further inward in the left-right direction than the locking portion 6j, which allows the shutter curtain 3 to be biased in the left-right direction under normal conditions, thereby preventing the normal opening and closing operation of the shutter curtain 3 from being impaired.

[0023] Furthermore, the pleated portion 10b of the smoke blocking material 10 extends from the base 10a and abuts against the main body 6a from the outdoor side at the locking receiving portion 2j, which serves as the tilt fulcrum when the shutter curtain 3 transforms into an inclined position bent in the indoor / outdoor direction. As a result, the abutting position of the pleated portion 10b against the main body 6a does not change significantly regardless of whether the slat 6 bends in the indoor or outdoor direction, and the pleated portion 10b of the smoke blocking material 10 can abut, providing a high smoke blocking effect. In addition, the smoke blocking material 10 can be positioned close to the slat 6, further contributing to making the guide rail 2 more compact in the indoor / outdoor direction.

[0024] It goes without saying that the present invention is not limited to the above-described embodiment, and it can be implemented, for example, with the indoor / outdoor directions reversed. [Industrial Applicability]

[0025] The present invention can be used as a shutter device for a building that is attached to an opening such as an entrance or exit of a building such as a building, warehouse, or house. [Explanation of symbols]

[0026] 1. Shutter device 2 guide rails 2e First protruding piece 2j Locking part 3. Shutter Curtain 6 slats 6a Main body 6b Upper connection part 6c Lower connection part 6j Locking part 6l concave part 7 Installation fittings 10 Smoke blocking material 10a base 10b folds X guide groove Xy groove opening edge

Claims

[Claim 1] The shutter curtain is provided with guide rails on the left and right sides of an opening that separates the indoor and outdoor areas, and is guided up and down with both left and right end edges loosely fitted into the guide grooves of the guide rails to open and close the opening, and a winding body that winds up the shutter curtain. The shutter curtain is formed by connecting adjacent slats so that they can swing freely in the indoor and outdoor directions, In a shutter device for buildings, the shutter curtain is prevented from slipping off the guide rail when it is bent in the indoor / outdoor direction due to wind pressure by a locking portion formed on the outer edge of the left and right direction of the recessed portion provided on one side of the indoor / outdoor direction of the slat, which locks into a locking receiving portion provided on a groove side piece on one side of the guide groove in the indoor / outdoor direction. When a smoke blocking material is provided at the groove opening end side portion on the other side of the guide rail in the indoor / outdoor direction to abut against the curtain surface on the other side of the shutter curtain in the indoor / outdoor direction, The tilt displacement of the shutter curtain when it is bent in the indoor / outdoor direction due to wind pressure and placed in the anti-slip position is based on the locking portion where the locking portion is locked to the locking receiving portion, and the indoor / outdoor portion of the shutter curtain is abutted against the corner portion of the groove opening edge of the guide rail, and the locking portion between the locking portion and the locking receiving portion is configured to be the tilt reference portion of the shutter curtain tilted in the anti-slip position, A shutter device for a building, characterized in that the tip edge of the smoke-blocking material is configured to abut against the shutter curtain from the other side of the shutter curtain in the indoor / outdoor direction that faces the inclination reference portion to block smoke.

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