Building shutter device

Abstract

To make a width of a guide rail 2 more compact in an indoor and outdoor directions in a building shutter device 1 in which a shutter curtain 3 is prevented from coming off the guide rail 2 by locking a locking portion 6j provided on a slat 6 to a locking receiving portion 2j provided on the guide rail 2 when the shutter curtain 3 bends due to wind pressure.SOLUTION: A locking portion 6j is an outer edge in the left-right direction of a recessed portion 6l formed in a slat 6. In a normal state where a shutter curtain 3 is not bent, a first protruding piece 2e in which a lock receiving portion 2j is formed is fitted into the recessed portion 6l.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 in buildings to open and close the entrances and exits of buildings such as buildings. However, in 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 rails. For example, wind-resistant hooks are provided on both left and right edge portions of the slats that make up the shutter curtain, and when the shutter curtain is bent by strong winds, these wind-resistant hooks are engaged with engaging portions provided on the guide rails to prevent the shutter curtain from coming loose (see, for example, Patent Document 1). However, with this system, not only do the wind-resistant hooks need to be prepared as separate components, but because the wind-resistant hooks protrude outward in the left-right direction beyond the left and right edge portions of the slats, the guide grooves formed in the guide rails need to be deep enough to accommodate the protrusion of the wind-resistant hooks from the slats, which means that the guide rails need to be long in the left-right direction, resulting in problems such as the system being large. In response to this, it has been proposed to use the outer left and right edges of recesses formed at both left and right edge portions of the slats as locking portions, and these locking portions lock into locking receiving portions provided on the guide rail side when the shutter curtain is bent, thereby preventing the shutter curtain from slipping off the guide rail (see, for example, Patent Documents 2 and 3). [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 [Patent Document 3] Japanese Patent Application Laid-Open No. 2008-8074 Summary of the Invention [Problem to be solved by the invention]

[0004] A configuration in which the outer left and right edges of the recessed portions formed in the slats are used as locking portions, and these locking portions are engaged with locking receiving portions provided on the guide rail side to prevent the shutter curtain from slipping out is effective in preventing the shutter curtain from slipping out, but when the shutter curtain is in its normal unbent state, the locking receiving portions are arranged facing each other and spaced apart (without interfering) from the slat surface on one side of the slat in the indoor / outdoor direction.This means that the groove width of the guide rail needs to be wider, making the guide rail wider in the indoor / outdoor direction (projection direction), which not only reduces the compactness of the guide rail but also creates problems such as the slat needing to move in the indoor / outdoor direction by the amount corresponding to the distance that the locking receiving portions are away from the slat surface in order for the locking portions to engage with the locking receiving portions, which reduces the speed with which the locking function can be achieved.These are 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 the connecting parts that face each other above and below 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 bends indoors or outdoors due to wind pressure by locking parts formed on the outer left and right end edges of the concave parts provided in the connecting parts locking with locking receiving parts provided on one groove side piece on the indoor / outdoor side of the guide groove, The upper and lower connecting portions of the slats are biased toward the indoor side, and the main body portion between the upper and lower connecting portions is biased toward the outdoor side, the recessed portion teeth, When the shutter curtain is not bent, The locking receiving portion is elongated in the left-right direction so that the locking receiving portion can fit in and be movable in the left-right direction when positioned in a position more inward in the left-right direction than the locking portion, and when the shutter curtain is bent in the indoor / outdoor direction and the locking portion is engaged with the locking receiving portion to prevent the shutter curtain from coming off, the left-right inner edge of the concave portion is set to a length that does not protrude from the groove opening edge of the guide groove, the locking receiving portion is formed on a first protruding piece that protrudes from the indoor side groove side piece of the guide groove, and a second protruding piece is formed on the outdoor side groove side piece of the guide groove from a position deeper in the groove than the first protruding piece towards the indoor side groove side piece, and when the shutter curtain is bent indoors, the connecting portion more inward in the left-right direction than the concave portion abuts against the groove opening edge on the indoor side of the guide groove, and the main body portion more outward in the left-right direction than the concave portion abuts against the second protruding piece to prevent the shutter curtain from coming off. This is a shutter device for a building characterized by the above. The invention of claim 2 is as follows: When the shutter curtain is bent toward the outdoors and is in a retained state, the main body portion on the inside in the left-right direction from the recessed portion abuts against the groove opening edge portion on the outdoors side of the guide groove, and the connecting portion on the outside in the left-right direction from the recessed portion abuts against the side portion of the indoor groove side piece on the deeper side of the groove than the first protruding piece of the guide groove, thereby preventing the shutter curtain from falling off. Characterized by Claim 1 1 is a shutter device for a building as described above. [Effects of the Invention]

[0006] By adopting the invention of claim 1, when the shutter curtain is bent in the indoor / outdoor direction due to wind pressure, the shutter curtain is prevented from coming off the guide rail by the locking portion formed in the recessed portion of the slat engaging with the locking receiving portion provided on the guide rail.In this state when the shutter curtain is not bent, the locking receiving portion is fitted into the recessed portion at a position more inward in the left-right direction than the locking portion.As a result, the groove width of the guide groove can be made smaller by the amount that the guide rail is fitted into the indoor / outdoor direction, and the locking portion can be engaged with the locking receiving portion when the locking receiving portion is fitted into the recessed portion, thereby preventing the shutter curtain from coming off quickly and reliably. Moreover,The concave portion is formed in an elongated shape that is long in the left-right direction so that it can move left-right relative to the locking receiving portion that fits into it under normal conditions.As a result, if the shutter curtain is biased left-right during normal opening and closing operation of the shutter curtain, the locking portion will immediately abut against the locking receiving portion, without interfering with the smooth opening and closing operation of the shutter curtain. Also The left-right length of the concave portion is set to a length that does not allow the left-right inner edge of the concave portion to protrude from the groove opening edge of the guide groove when the shutter curtain is in the prevented state, and when the shutter curtain is in the prevented state, the left-right inner part of the connecting portion abuts the groove opening edge on the bending direction side of the guide groove.As a result, when the shutter curtain is in the prevented state, the connecting portion of the slat that is left-right inner than the concave portion abuts the groove opening edge, and the strength of the slat is not impaired as in the case when the part where the slat has become thinner due to the formation of the concave portion abuts the groove opening edge, and wind pressure resistance strength is maintained. moreover With the upper and lower connecting parts biased toward the indoor side, the main body biased toward the outdoor side, and the locking receiving part formed on the first protruding piece protruding from the indoor side groove side piece, the first protruding piece on which the locking receiving part is formed is fitted into the concave part on the indoor side.As a result, in the normal state when the shutter curtain is not bending, the gap between the first protruding piece and the concave part can be made larger than the gap between the groove opening edge and the slat.This prevents the occurrence of problems such as the first protruding piece abutting the concave part before the slat abuts the groove opening edge when the shutter curtain is swung indoors or outdoors during opening and closing operations, causing abnormal noises. AlsoWhen the shutter curtain is bent toward the interior and prevented from slipping out, the connecting portion located inside the recessed portion in the left-right direction abuts the opening edge of the groove on the interior side, and the main body portion located outside the recessed portion in the left-right direction abuts the side portion of the outdoor gutter side piece at the back of the groove.As a result, the slats are supported by the guide rails both indoors and outdoors at both left and right sides of the locking portion that locks into the locking receiving portion, which allows the load to be distributed and supported when the shutter curtain is prevented from slipping out, thereby improving the strength of the locking portion. and When the shutter curtain is bent toward the interior and prevented from coming loose, the main body abuts against the second protruding piece on the exterior side, which is located further back in the groove than the first protruding piece. As a result, on the exterior side where there is no recess, the connecting part abuts securely against the guide groove, ensuring stable prevention, and the space on the tip side of the second protruding piece can be used as space for arranging other components such as smoke-blocking material. Claim 2 By adopting this invention, when the shutter curtain is bent toward the outdoors and prevented from slipping out, the main body part on the inside in the left-right direction from the concave part abuts on the edge of the groove opening on the outdoors side, and the connecting part on the outside in the left-right direction from the concave part abuts on the side part of the groove side piece on the indoor side at the back of the groove. shutter curtain The locking member is supported by the guide rails both indoors and outdoors at both the left and right sides of the locking portion that locks into the locking receiving portion, which allows the load to be distributed and supported when the locking member is prevented from coming loose, thereby improving the locking strength. [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 device, the contact portion of the pleated portion tip edge 10c against the main body 6a is the locking receiving portion 6j, which serves as the tilt fulcrum when the shutter curtain 3 bends and displaces to tilt, as described above.This prevents the pleated portion 10b from changing its contact position against the main body 6a significantly when the shutter curtain 3 is bent indoors or outdoors due to wind pressure and is in a locked state, allowing for a high level of smoke-blocking functionality.In addition, the pleated portion 10b can 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, thereby contributing to making the guide rail 2 more compact.

[0021] In the present embodiment configured as described above, if the shutter curtain 3, which is guided by the guide rail 2 and moves to open and close, is deflected by wind pressure from a strong wind in the fully closed state, the locking receiving portion 2j provided on the guide rail 2 will engage with the locking portion 6j formed in the recessed portion 6l provided on the slat 6, thereby preventing the shutter curtain 3 from coming off the guide rail 2. In this case, when the shutter curtain 3 is in a normal state where it is not deflected, the locking receiving portion 2j is fitted into the recessed portion 6l at a position more inward in the left-right direction than the locking portion 6j, and as a result, the groove width of the guide groove X in the indoor / outdoor direction can be made smaller by the amount that the locking receiving portion 2j is fitted into the recessed portion 6l, thereby reducing the width of the guide rail 2 in the indoor / outdoor direction and making it more compact. Moreover, the locking portion 6j can be engaged with the locking receiving portion 2j while the locking receiving portion 2j remains fitted into the recessed portion 6l, thereby providing a quick and reliable prevention function.

[0022] Moreover, in this device, the first protruding piece 2e on which the locking receiving portion 2j is formed is formed to protrude from the groove side surface on one side of the guide groove X in the indoor / outdoor direction toward the other side in the indoor / outdoor direction, and is fitted into the recessed portion in the normal state, which simplifies the structure of the locking receiving portion and contributes to making the guide rail more compact. Furthermore, in this device, when the shutter curtain 3 is in its normal state without bending, 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 Xy (specifically, the groove inner piece 8a of the indoor side decorative panel 8) (S>K).As a result, when the shutter curtain 3 swings toward the indoor side during normal opening and closing operations, the first protruding piece 2e will abut 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 Xy, preventing malfunctions such as the generation of abnormal noise, and the normal opening and closing operation of the shutter curtain 3 being maintained. Furthermore, in this case, the recessed portion 6l is formed as an elongated member that is long in the left-right direction so that it can move left-right relative to the first protruding piece 2e on which the locking receiving portion 2j is formed.As a result, if the shutter curtain 3 is biased left-right during normal opening and closing operations of the shutter curtain 3, the locking portion 6j will immediately come into contact with the locking receiving portion 2j, and this will not interfere with the smooth opening and closing operation of the shutter curtain 3.

[0023] Furthermore, when the shutter curtain 3 is in a retained state, the recessed portion 6l is set to a length such that the inner edge 6k of the recessed portion 6l in the left-right direction does not protrude from the groove opening edge Xy of the guide groove, and the portion of the main body 6a that is left-right inward from the recessed portion abuts the groove opening edge Xy on the bending direction side of the guide groove.As a result, when the shutter curtain 3 is in a retained state, the slat 6 abuts the groove opening edge Xy of the guide rail 2 at a portion of the main body 6a that is left-right inward from the recessed portion 6l and has no notch.This prevents the strength of the slat from being impaired, as would be the case when, for example, the thin-walled portion of the recessed portion 6l abuts the groove opening edge Xy, and improves wind pressure resistance.

[0024] Furthermore, when the shutter curtain 3 is bent in the indoor / outdoor direction and prevented from slipping out, the connecting portions 6b, 6c or main body portion 6a, which are located inside the recessed portion 6l in the left-right direction, will abut against the corner portions 8b, 9b of the indoor / outdoor decorative panels 8, 9, which are the groove opening edge portion Xy. In this case, when the bending direction is toward the outdoors, the tip edge 6m of the connecting parts 6b, 6c at the back of the groove, which are laterally outward of the recessed part 6l, abuts against the first groove side piece 2b, and when the bending direction is toward the indoors, the main body part 6a at the back of the groove, which are laterally outward of the recessed part 6l, abuts against the second protruding piece 2g.As a result, the slat 6 is supported by the guide rail 2 both indoors and outdoors on both the left and right sides of the locking receiving part 2j with which the locking part 6j locks, and the load when preventing it from coming out can be distributed and supported, thereby improving the strength of the locking mechanism. Furthermore, when the bending direction is toward the indoor side, the main body 6a at the back of the groove, which is laterally outboard of the recessed portion 6l, will abut against the second protruding piece 2g. As a result, the main body can reliably abut against the guide rail 2 on the outdoor side where there is no recessed portion 6l, providing a stable prevention of slipping out, and the space on the Xy side of the groove opening edge portion beyond the second protruding piece 2g can be effectively used as space for arranging components such as the smoke-blocking material 10.

[0025] Of course, the present invention is not limited to the above-described embodiment, and can be implemented with the indoor / outdoor direction reversed, or even without the smoke blocking material 10. When the smoke blocking material 10 is not present, the guide rail 2 may, for example, be one in which the third groove side piece 2k extends from the tip edge of the second protruding piece 2g toward the groove opening edge Xy, as in the other example shown in Figures 9(A) and (B), or one in which the second groove side piece 2c extends directly toward the groove opening edge Xy and the second protruding piece 2g protrudes from an intermediate position. [Industrial Applicability]

[0026] 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]

[0027] 1. Shutter device 2 guide rails 2b First groove side piece 2c Second groove side piece 2e First protruding piece 2g Second protruding piece 2j Locking part 3. Shutter Curtain 4 Winding drum 5. Opening and closing mechanism 6 slats 6a Main body 6b Upper connection part 6c Lower connection part 6j Locking part 6l concave part X guide groove Xy groove opening edge

Claims

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 the connecting parts of adjacent slats facing each other above and below so that they can swing freely indoors and outdoors, In a building shutter device configured such that a shutter curtain that has been bent in the indoor / outdoor direction due to wind pressure is prevented from slipping off from a guide rail by a locking portion formed on the outer edge of the left and right direction of a recessed portion provided in the connecting portion locking with a locking receiving portion provided on one side of the groove in the indoor / outdoor direction of the guide groove, The upper and lower connecting portions of the slats are biased toward the indoor side, and the main body portion between the upper and lower connecting portions is biased toward the outdoor side, The recessed portion is elongated in the left-right direction so that, when the shutter curtain is in a normal unbent state, the locking receiving portion is positioned at a position inward in the left-right direction from the locking portion, and the locking receiving portion can fit in the recessed portion to be movable in the left-right direction, and when the shutter curtain is in a state where the locking portion is locked to the locking receiving portion and the shutter curtain is prevented from slipping out due to the shutter curtain being bent in the indoor / outdoor direction, the left-right inner edge of the recessed portion is set to a length that does not protrude from the groove opening edge of the guide groove, The locking receiving portion is formed on a first protruding piece portion that protrudes from the indoor groove side piece portion of the guide groove, A second protruding piece is formed on the outdoor groove side piece of the guide groove so as to protrude from a position deeper in the groove than the first protruding piece toward the indoor groove side piece, A shutter curtain is a shutter device for a building, characterized in that when the shutter curtain is bent toward the indoor side, the connecting portion located inside the concave portion in the left-right direction abuts the groove opening edge portion on the indoor side of the guide groove, and the main body portion located outside the concave portion in the left-right direction abuts the second protruding piece portion, thereby preventing the shutter curtain from coming loose.

2. The shutter curtain is a shutter device for a building as described in claim 1, characterized in that when the shutter curtain is bent toward the outdoors and prevented from coming off, the main body portion on the left and right inside of the concave portion abuts against the groove opening edge portion on the outdoors side of the guide groove, and the connecting portion on the left and right outside of the concave portion abuts against the side portion of the indoor groove side piece portion that is deeper in the groove than the first protruding piece portion of the guide groove, thereby preventing the shutter curtain from coming off.

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