Building shutter device

Abstract

To provide a building shutter device capable of preventing a shutter curtain 3 from coming off from a guide rail 2 when it bends due to wind pressure in a manner that a locking portion 6p provided at a slat 6 side locks on a locking receiving portion 7b provided on the guide rail 2 side, so as to reinforce the locking part 6p of the slat 6.SOLUTION: In a part that fits into a guide rail 2 of a slat 6, a concave portion 6d and a tip edge portion 6e are formed with a locking part 6p sandwiched therebetween. A first reinforcing plate 8a is fixed to the concave portion 6d, and a second reinforcing plate 8b is fixed to the tip edge portion 6e. A reinforcing metal fitting 8 formed with a connecting portion 8c that connects both the reinforcing plate portions 8a and 8b is attached to the locking part 6p to reinforce the slat 6.SELECTED DRAWING: Figure 10

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 in bad weather, and may come loose from the guide rails. For example, there is a configuration in which 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 a strong wind, these wind-resistant hooks are engaged with engaging portions provided on the guide rails to prevent the shutter curtain from coming loose.However, with this configuration, not only are the wind-resistant hooks required as separate components, but the wind-resistant hooks protrude outward in the left and right direction beyond the left and right edge portions of the slats, so the guide rails need to be made deeper to accommodate the wind-resistant hooks protruding from the slats, which creates problems such as the guide rails becoming larger. Therefore, it has been proposed to form a recessed portion at both left and right edge portions of the slat, leaving the tip edge, and to configure the locking portion formed at the tip side of the recessed portion to lock into a convex locking receiving portion provided on the guide rail side when the shutter curtain is bent by wind pressure, thereby preventing the shutter curtain from slipping off the guide rail (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4864599 Summary of the Invention [Problem to be solved by the invention]

[0004] The conventional shutter curtain is prevented from slipping out by forming recesses in the slats, and is simple in structure and easy to process, yet provides high slip-out prevention performance. However, with recent weather conditions tending to worsen, for example with typhoons becoming larger, there are concerns that if the slats are designed to be prevented from coming loose by the locking portion and the locking receiving portion, the strength of the locking portion formed on the slats may be insufficient.As a result, it has been proposed to increase the strength of the slats, and this is the problem that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention has been made in view of the above-mentioned circumstances and with the aim of solving these problems, and the invention of claim 1 relates to a shutter device for a building comprising guide rails provided on the left and right sides of an opening separating 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, the shutter curtain being formed into a series by connecting adjacent slats so that they can swing freely indoors and outdoors, the slats being configured with upper and lower connecting parts for connecting them so that they can swing freely, and a main body part between the upper and lower connecting parts, and the shutter curtain being prevented from slipping off the guide rails when it is bent indoors or outdoors due to wind pressure by locking parts formed on the outer left and right end edges of recessed parts provided in the main body part engaging with locking receiving parts provided in the guide groove, the shutter curtain being reinforced by reinforcing metal fittings that are integral with the slats, and The main body of the slat bulges outward toward the exterior from the center in the left-right direction relative to the recessed portion, while the recessed portion and the outer leading edge portion in the left-right direction have flat pressed portions, and first and second reinforcing plate portions of the reinforcing metal fitting are fixed to the flat pressed portions of the recessed portion and the leading edge portion, respectively. This is a shutter device for a building characterized by the above. Claim 2The invention is characterized in that the guide rail is configured so that the groove width of the guide groove is small at the groove opening side and large at the groove inner side, the slat is configured so that the thickness of the tip edge portion is larger than the groove width at the groove opening side but smaller than the thickness of the main body portion, and the reinforcing metal fitting is formed so that the first reinforcing plate portion and the second reinforcing plate portion are integrally formed via a connecting portion at the locking portion. 1 1 is a shutter device for a building as described above. Claim 3 The invention is characterized in that the slats are formed with the upper and lower connecting parts biased toward the interior side of the main body, and the reinforcing metal fittings are attached to the interior side of the main body. 2 1 is a shutter device for a building as described above. Claim 4 The invention is characterized in that a vertically long notch hole is formed in a boundary portion formed between the concave portion and the tip edge of the slat, which slopes toward the indoor side as it approaches the concave portion, and the upper and lower peripheral edges of the notch hole are configured as locking portions that lock onto the locking receiving portions, and the connecting portion of the reinforcing metal fitting is inclined so as to be biased toward the indoor side as it approaches the first reinforcing plate portion, and is located approximately at the same position as the locking portion formed on the slat or close to the outside in the left and right direction. 3 1 is a shutter device for a building as described above. Claim 5 The invention of any one of claims 1 to 5 is characterized in that the reinforcing metal fittings are composed of first reinforcing metal fittings that extend from the left and right edge portions of the second reinforcing plate portion that protrude beyond the left and right edge portions of the slat to the upper and lower connecting portions of the adjacent slats and have slippage prevention portions that prevent lateral slippage between adjacent slats, and second reinforcing metal fittings that extend from the second reinforcing plate portion to the slat edge portions and have no slippage prevention portions. 4 The shutter device for a building according to any one of the above items. [Effects of the Invention]

[0006] By adopting the invention of claim 1, when the shutter curtain is subjected to wind pressure and bends in the indoor / outdoor direction, displacing in a direction that causes it to slip out of the guide rail, the locking portion provided in the concave portion of the slat will engage with the locking receiving portion on the guide groove side, thereby preventing it from slipping out of the guide groove of the guide rail.The slat is provided with reinforcing metal fittings that are integrally formed with a first reinforcing plate portion fixed to the concave portion arranged on the inside of the left and right directions of the locking portion, and a second reinforcing plate portion fixed to the tip edge portion on the outside of the concave portion.As a result, the slat is reinforced on both the left and right sides of the locking portion by the reinforcing metal fittings, thereby increasing its strength, and it is possible to provide a shutter curtain that is strong enough to withstand recent worsening weather conditions. Moreover, The recessed portion and the tip edge portion to which the reinforcing metal fitting is fixed are Because it has a flat pressed part, The reinforcing metal fittings are fixed to the slats in a stable state of flat contact, which contributes to increasing the strength of the slats. Claim 2 By adopting this invention, the thickness of the tip edge portion that fits into the innermost groove of the slat is set to be larger than the groove width of the groove opening side but smaller than the thickness of the main body portion, and the first reinforcing plate portion and the second reinforcing plate portion of the reinforcing fitting are integrally formed via a connecting portion at the engaging portion, thereby ensuring reinforcement of the engaging portion of the slat. Claim 3 By adopting this invention, the slats can be reinforced by reinforcing metal fittings on the indoor side of the main body part on the side where the upper and lower connecting parts are biased, thereby preventing the reinforcing metal fittings from protruding from the slats and interfering with the guide rails. Claim 4 By adopting this invention, the upper and lower peripheral edges of the cutout hole formed at the boundary between the concave portion and the tip edge portion of the slat are formed in the locking portion, and the connecting portion of the reinforcing metal fitting is located at approximately the same position as the locking portion or close to the outside in the left-right direction relative to the locking portion.As a result, when the locking portion locks into the locking receiving portion and is prevented from coming loose, it is possible to avoid excessive load being applied to the slat fixing portion of the reinforcing metal fitting, which would otherwise cause the slat to break, as would occur if the connecting portion were to lock into the locking receiving portion first, and the strength of the reinforced slat can be maintained. Claim 5By adopting this invention, the first reinforcing metal fitting that reinforces the slats is formed with a slippage prevention portion that prevents lateral slippage between adjacent slats, and so it also serves as a lateral slippage prevention member, which contributes to simplifying the structure. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a schematic front view of the shutter device. [Figure 2] This is a horizontal cross-sectional view of the guide rail insertion portion of the shutter curtain. [Figure 3] (A) and (B) are side views of the main parts of the shutter curtain and front views of the main parts of the left and right edge portions. [Figure 4] 10A, 10B, and 10C are a front view, a side view, and a cross-sectional plan view of the guide rail insertion portion of the slat with the first reinforcing metal fitting attached. [Figure 5] 10A, 10B, and 10C are a front view, a side view, and a cross-sectional plan view of the guide rail insertion portion of the slat with the second reinforcing metal fitting attached. [Figure 6] 1A, 1B, and 1C are a front view, a side view, and a cross-sectional plan view of the guide rail insertion portion of the slat. [Figure 7] 1A and 1B are horizontal cross-sectional views of a guide rail and a guide rail with a decorative panel attached thereto. [Figure 8] 1A, 1B, 1C, and 1D are a front view, a side view, a plan view, and a longitudinal cross-sectional view of the first reinforcing metal fitting. [Figure 9] 1A, 1B, 1C, and 1D are a front view, a side view, a plan view, and a longitudinal cross-sectional view of the second reinforcing metal fitting. [Figure 10] (A) and (B) 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. 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 as long, strip-shaped slats 6 that are long in the left-right direction, and are connected so that adjacent slats 6 at the top and bottom can swing freely indoors and out relative to each other by interlocking them together at the top and bottom.The slats 6 are configured with a main body 6a that bulges out in an arc (curved) shape toward the outdoors, and upper and lower connecting parts 6b, 6c that are formed at the upper and lower end edges of the main body 6a and biased toward the indoor side relative to the main body 6a, and are interlocked with each other to connect the slats 6 together in a continuous vertical fashion. Incidentally, the connection structure between adjacent slats 6 is often collectively referred to as an interlock connection, but this interlock connection is sometimes distinguished by calling the connection structure of this embodiment, in which the upper connecting portion 6b is contained within the lower connecting portion 6c, an "interlock connection" in the narrow sense, and the connection structure in which the upper connecting portion 6b contains the lower connecting portion 6c, which is often used in shutter devices with smoke prevention functions, an "overlapping connection." However, it goes without saying that the shutter curtain 3 in which the present invention can be implemented will suffice as long as 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 loosely fitted 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 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 comprises a groove bottom piece 2a that forms the groove bottom surface of the guide groove X, a first groove side piece 2b that extends inward in the left-right direction from the indoor side edge of the groove bottom piece 2a, a second groove side piece 2c that extends inward in the left-right direction from the outdoor side edge of the groove bottom piece 2a, but whose extension length reaches the middle of the first groove side piece 2b in the left-right direction, a bent piece 2d that is bent from the inner left-right edge of the second groove side piece 2c toward the indoor side (towards the first groove side piece 2b), and a third groove side piece 2e that is bent inward in the left-right direction from the indoor side edge of the bent piece 2d so that its tip edge 2g is at the same position in the left-right direction as the tip edge 2h of the first groove side piece 2b, and is configured so that the space between the tip edges 2h, 2g forms the opening of the guide groove X (groove opening). With the guide rail 2 configured in this manner, the guide groove X is composed of a groove opening side Xy between the first groove side piece 2b and the third groove side piece 2e, and a groove inner side Xz between the first groove side piece 2b and the second groove side piece 2c. In this case, the guide groove X is formed in a dovetail shape, with the groove width Y of the groove opening side Xy (the actual "groove width" taking into account the thickness of the decorative panels 7, 7a in the indoor / outdoor directions; the same applies below) being narrow, and the groove width Z of the groove inner side Xz being wide (Z>Y), and the corner portion 2f between the third groove side piece 2e and the bent piece 2d has a right-angle shape, which essentially forms the locking receiving portion described below. Furthermore, the locking receiving portion does not have to be configured as a corner portion between the bent piece portion 2d and the third groove side piece portion 2e as in this embodiment, but the present invention can also be implemented in a guide rail in which the groove widths of the guide grooves X are all the same, with the locking receiving portion being formed to protrude from one groove side piece in the indoor / outdoor direction toward the other groove side piece.

[0011] Furthermore, the guide rail 2 of the present embodiment is covered by an indoor decorative panel 7 extending from the tip edge 2h of the first groove side piece 2b to the middle part of the groove inner side part Xz with the increased width, and an outdoor decorative panel 7a extending from the tip edge 2g of the third groove side piece 2e through the corner part 2f to the bent piece part 2d. With such a configuration, the corner part 7b of the outdoor decorative panel 7a corresponding to the corner part 2f of the guide rail 2 becomes a locking receiving part 7b locked by the locking part 6p provided on the slat 2 as described later. When such locking is performed, the load for preventing the shutter curtain 3 from coming off is substantially received by the bent piece part 2d formed at the corner part 2f of the guide rail 2 via the locking receiving part 7b. That is, the bent piece part 2d for forming the corner part 2f provided on the guide rail 2 of the present embodiment functions as a load receiving part for receiving the load when the shutter curtain 3 tries to come out of the guide rail 2, regardless of the presence or absence of the outdoor decorative panel 7a.

[0012] On the other hand, in the slat 6, a concave part 6d is formed in which the main body part 6a of the left and right peripheral parts including the part that fits loosely into the groove opening side part Xy of the guide rail 2 is recessed in a planar shape by press working. The tip edge part 6e located outside the concave part 6d in the left and right direction and reaching the left and right direction tips of the slat 6 is also formed in a planar shape without reaching the concave part 6d by press working. And the thickness of the slat 6 configured in this way in the indoor-outdoor direction is set as follows. First, the thickness P of the part of the main body part 6a of the slat 6 where no press working is performed is smaller than the groove width Z of the groove inner side part Xz and larger than the narrow groove width Y of the groove opening side part Xy between the first groove side piece 2b and the third groove side piece 2e (Z > P > Y). On the other hand, the thickness Py of the concave part 6d is set to be smaller than the groove width Y of the groove opening side part Xy (Py < Y), and the concave part 6d is configured to fit in a loose-fitting manner. Also, the thickness Pz of the tip edge portion 6e is set to be larger than the groove width Y of the groove opening side portion Xy but smaller than the thickness P of the main body portion 6a (Y < Pz < P). Incidentally, in this case, the concave portion 6d is formed in the slat 6 by pressing, so that the portion of the connecting portion 6f of the lower connecting portion 6c corresponding to the concave portion 6d of the main body portion 6a becomes a relief portion 6g due to the formation of the concave portion 6d and is deformed downward in a bulging shape. Incidentally, in the present embodiment, by forming the relief portion 6g on the lower connecting portion 6c side, when the adjacent slats 6 swing in the indoor / outdoor direction at the interlock coupling portion R, it is assumed that the relief portion 6g does not cause any problems such as contacting the upper connecting portion 6b. However, if there are no such problems, it may be formed on the upper connecting portion 6b side, and it is needless to say that it may be formed on both the connecting portions 6b and 6c sides.

[0013] Furthermore, a boundary portion 6h is formed in the main body portion 6a of the slat 6 with a left-right gap between the concave portion 6d and the tip edge portion 6e. The boundary portion 6h is inclined with the indoor side being an arc inner peripheral surface. The boundary portion 6h is formed with a vertically long notch hole 6j leaving the upper and lower edge portions 6i. The upper and lower peripheral edges of the notch hole 6j at the upper and lower edge portions 6i are configured to be locking portions 6p for retaining as described later. Incidentally, the planar portion 6k formed on the tip edge portion 6e of the slat 6 is narrower in the vertical direction than the planar portion 6l formed in the concave portion 6d. Therefore, it is not necessary to provide a relief portion 6g as in the case of pressing the planar portion 6l in the concave portion 6d, but it is needless to say that a relief portion may be provided if necessary. [[ID= 9]]

[0014] Reference numerals 8 and 9 denote first and second reinforcing brackets attached to the indoor side surfaces of the left and right edge portions of the slats 6, and the first and second reinforcing brackets 8, 9 are attached alternately to adjacent slats 6 above and below, and as will be described later, the first reinforcing bracket 8 is provided with a slippage prevention portion 8h that prevents left-right slippage between adjacent slats 6 in close proximity to the interlock joint R, whereas the second reinforcing bracket 9 does not have such a portion. Next, the structure of the first reinforcing bracket 8 will be described in detail, and a detailed description of the second reinforcing bracket 9 will be omitted unless particularly necessary, and the second reinforcing bracket 9 will simply be given reference numerals 9a to 9f that correspond to the reference numerals 8a to 8f that are given to the various portions of the first reinforcing bracket 8.

[0015] The first reinforcing metal fitting 8 comprises a first reinforcing plate portion 8a that is attached and fixed in a state in which it abuts against the indoor side of the flat portion 6l in the recessed portion 6d, and a second reinforcing plate portion 8b that is attached and fixed in a state in which it abuts against the indoor side of the flat portion 6k of the tip edge portion 6e, and the connecting portion 8c between the first reinforcing plate portion 8a and the second reinforcing plate portion 8b is inclined, but the connecting portion 8c is set to be located at approximately the same position as, or slightly offset outward in the left-right direction with respect to, the engaging portion 6p that is the upper and lower peripheral edges of the cutout hole 6j at the boundary portion 6h between the recessed portion 6d and the tip edge portion 6e.

[0016] The first and second reinforcing plate portions 8a, 8b of the first reinforcing metal fitting 8 are formed by press working with a pair of connecting projections 8d, 8e at the top and bottom that protrude cylindrically toward the outdoors. The first reinforcing bracket 8 is configured to be attached and fixed integrally to the slat 6 by forming a crushed portion 8f by pressing the connecting protrusions 8d, 8e from the outside side into an expanded shape, with the connecting protrusions 8d, 8e fitted into the concave portion 6d and the connecting holes 6m, 6n formed in the tip edge portion. Furthermore, the connecting holes 6m, 6n formed on the slat 6 side have a tapered inner surface in the shape of a truncated cone, with the hole diameter larger on the outdoor side and smaller on the indoor side.When the connecting protrusions 8d, 8e inserted into the connecting holes 6m, 6n are crushed (crimped) from the outdoor side, the connecting protrusions 8d, 8e are deformed in an expanded state in which they abut the tapered inner surfaces of the connecting holes 6m, 6n, thereby ensuring that they are attached and fixed in a prevented from coming loose.By attaching and fixing the first reinforcing bracket 8 to the slat 6 in this way, the portion of the slat 6 that is inserted into the guide rail 2 is reinforced.

[0017] The first reinforcing bracket 8 differs from the second reinforcing bracket 9 in that the second reinforcing surface portion 8b is formed with an extending portion 8g that extends outward in the left-right direction beyond the left-right edge of the slat tip edge portion 6e, and misalignment prevention portions 8h extend in the up-down direction from both the upper and lower edge portions of the extending portion 8g. The misalignment prevention portions 8h are configured to face closely from the outside in the left-right direction to the interlock joint portions R of vertically adjacent slats 6, thereby preventing relative lateral misalignment between the slats 6 in the left-right direction.

[0018] In this way, the shutter curtain 3 is constructed by interlocking slats 6, each having the first and second reinforcing brackets 8, 9 attached alternately, and connecting them in a series vertically, and each slat 6 is fitted into the guide rail 2 with the recessed portion 6d loosely fitting into the groove opening side portion Xy, which has the narrow groove width Y. When the shutter curtain 3 is in a normal state (normal time) where it is not bent in the indoor or outdoor direction due to wind pressure, it fits loosely into the recessed portion 6d, with the third groove side piece 2e located in the middle part of the recessed portion 6d in the left-right direction, as shown in Figure 2, and the boundary portion 6h is located outside the locking receiving portion 7b of the indoor side decorative panel 7 in the left-right direction.

[0019] When the shutter curtain 3 incorporated into the guide rail 2 is in a fully closed position and is subjected to wind pressure caused by wind generated during bad weather such as a typhoon, the central portion of the shutter curtain 3 will bend and deform in the indoor / outdoor direction.When the shutter curtain 3 is bent, the left and right edge portions of the shutter curtain 3 will be biased (moved) inward in the left-right direction, and the locking portion 6p formed between the recessed portion 6d and the tip edge portion 6e will lock into the locking receiving portion 7b arranged in the guide groove X, preventing it from slipping out of the guide rail 2.

[0020] In this case, if the deflection direction of the shutter curtain 3 is due to external (positive) wind pressure from the outdoor side to the indoor side, as shown in Figure 10 (A), the locking portion 6p formed at the boundary portion 6h of the slat 6 that has moved inward in the left-right direction locks into the locking receiving portion 7b formed on the outdoor side decorative panel 7a, preventing the shutter curtain 3 from coming loose.However, in this locked state, the outdoor side edge portions of the upper and lower connecting portions 6b, 6c at the recessed portion 6d are in an inclined state in contact with the opening side edge portion 7d of the indoor side decorative panel 7. In contrast, when the deflection direction of the shutter curtain 3 is due to wind pressure in the internal pressure (negative pressure) direction from the indoor side to the outdoor side, as shown in Figure 10 (B), just as when wind pressure is applied in the external pressure direction, the locking portion 6p formed at the boundary portion 6h of the slat 6 that has moved inward in the left-right direction locks with the locking receiving portion 7b formed on the outdoor decorative panel 7a, preventing the shutter curtain 3 from coming off.In this prevented-from-coming state, the outdoor side of the recessed portion 6d abuts against the groove opening side edge portion 7c of the outdoor decorative panel 7a, and the indoor side end of the left-right leading edge (outer edge) 6o of the slat 6 abuts against the indoor side decorative panel 7 at the back side Xz of the groove, resulting in an inclined state in which the shutter curtain 3 is prevented from coming off.

[0021] In this embodiment configured as described above, when the shutter curtain 3 is bent in the indoor / outdoor direction due to wind pressure and the locking portion 6p formed at the boundary portion 6h of the slat 6 locks into the locking receiving portion 7b formed on the outdoor decorative panel 7a, the load on the guide rail 2 side is received by the bent piece portion 2d side of the guide rail 2 via the locking receiving portion 7b. However, since the guide rail 2 is a thick piece formed integrally by extruding steel material, it can adequately withstand the load and will not cause any problems such as deformation. On the other hand, on the shutter curtain 3 side, when the locking portion 6p is locked into the locking receiving portion 7b, the load on the slat 6 side will be borne by the locking portion 6p. In this case, the slat 6 is attached to the slat 6 with the first and second reinforcing fittings 8, 9, which have first reinforcing plate portions 8a, 9a attached and fixed to the inner recessed portion 6d in the left-right direction with the locking portion 6p in between, and second reinforcing plate portions 8b, 9b attached and fixed to the outer tip edge portion 6e, sandwiching the locking portion 6p on both sides.As a result, the left and right edge portions that are subjected to the load when preventing the slat 6 from slipping out can be reinforced, and reinforcement measures can be taken in response to recent worsening weather conditions such as larger typhoons.

[0022] Moreover, in this case, the recessed portion 6d and the tip edge portion 6e of the slat 6 to which the first and second reinforcing metal fittings 8 and 9 are fixed are formed by pressing the arc-shaped main body portion 6a into a flat portion. (Corresponding to the flat press-formed portion of the present invention) As a result of being formed with the flat portions 6l and 6k present, the recessed portion 6d and the tip edge portion 6e can be easily machined into a flat shape, and the first and second reinforcing metal fittings 8 and 9 are fixed to the slat 6 in a stable surface contact state in which the first and second reinforcing plate portions 8a, 9a, 8b, and 9b abut flatly against the flat portions 6l and 6k, thereby contributing to increasing the strength of the slat 6. Furthermore, the thickness Pz of the tip edge portion 6e of the guide rail 2, which fits into the groove back side Xz of the slat 6, is set to be larger than the groove width Y of the groove opening side Xy but smaller than the thickness P of the main body portion 6a, and the first reinforcing plate portions 8a, 9a and the second reinforcing plate portions 8b, 9b of the first and second reinforcing fittings 8, 9 are integrally formed via connecting portions 8c, 9c at the engaging portion 6p portion, so that the boundary portion 6h between the recessed portion 6d where the engaging portion 6p of the slat 6 is formed and the tip edge portion 6e can be reliably reinforced, thereby increasing the strength of the slat 6.

[0023] Furthermore, the slat 6 is formed with the upper and lower connecting portions 6b, 6c biased toward the indoor side relative to the main body portion 6a, and the first and second reinforcing brackets 8, 9 are attached and fixed to the indoor side of the main body portion 6a. However, the first and second reinforcing brackets 8, 9 can be attached and fixed to the slat 6 on the indoor side of the main body portion 6a on the side where the upper and lower connecting portions 6b, 6c are biased, which prevents the first and second reinforcing brackets 8, 9 from protruding from the indoor side of the slat 6 and interfering with the guide rail 2.

[0024] Furthermore, in this case, the slat 6 is configured with a boundary portion 6h where a locking portion 6p is formed between the recessed portion 6d and the tip edge portion 6e, and the boundary portion 6h is inclined toward the indoor side as it approaches the recessed portion, and a long cutout hole 6j is formed in the vertical direction, and the upper and lower peripheral portions of the cutout hole 6j are configured as the locking portion 6p that locks into the locking receiving portion 7b. Meanwhile, the connecting portions 8c, 9c of the first and second reinforcing fittings 8, 9 are inclined toward the interior as they approach the first reinforcing plate portions 8a, 9a, and are positioned approximately at the same position as or close to the outside in the left-right direction of the locking portion 6p formed on the slat 6. This means that when the locking portion 6p locks into the locking receiving portion 7b to prevent it from coming off, the locking portion 6p formed at the boundary portion 6h locks into the locking receiving portion 7b simultaneously with or before the connecting portions 8c, 9c. As a result, it is possible to avoid damage to the connecting holes 6m, 6n of the slat 6 due to excessive load being applied to the crushing portions 8f, which serve as the slat fixing portions of the first and second reinforcing fittings 8, 9, as would occur if the locking portion 6p locked into the connecting portions 8c, 9c first, and therefore the strength of the reinforced slat 6 can be maintained.

[0025] In this case, the first and second reinforcing plate portions 8a, 9a, 8b, 9b can be easily fixed to the slat 6 by passing the connecting protrusions 8d, 9d, 8e, 9e formed on the first and second reinforcing plate portions 8a, 9a, 8b, 9b through the connecting holes 6m, 6n formed in the slat 6, and then compressing the tip portions of the passed-through connecting protrusions 8d, 9d, 8e, 9e into an expanded shape by press processing, thereby improving processing workability.

[0026] In addition, in this structure, the second reinforcing plate portion 8b of the first reinforcing bracket 8 extends outward in the left-right direction beyond the tip edge 6o of the slat 6, and the anti-slip portion 8h formed by protruding in the vertical direction from the extended portion 8g faces closely from the outside in the left-right direction to the interlock joint portion R, which is the connection portion between the upper and lower connecting portions 6b, 6c of adjacent slats 6, thereby preventing lateral slippage between adjacent slats 6.As a result, the first reinforcing bracket 8 not only functions to reinforce the slats 6, but also functions to prevent lateral slippage between the slats 6, allowing the component to be used for multiple purposes and contributing to simplification of the structure. [Industrial Applicability]

[0027] 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]

[0028] 1. Shutter device 2 guide rails 2nd floor corner 3. Shutter Curtain 4 Winding drum 6 slats 6a Main body 6b Upper connection part 6c Lower connection part 6d concave part 6e Tip edge 6h border 6i Upper and lower edges 6j Notch hole 6p locking part 7 Indoor decorative panel 7a Outdoor decorative panel 7b Locking receiving part 8 First reinforcing bracket 8a First reinforcing plate part 8b Second reinforcing plate part 8c connection part 8h Anti-slip part 9 Second reinforcing bracket 9a First reinforcing plate part 9b Second reinforcing plate part Entrance E X guide groove Xy groove opening side Xz groove inner side

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 in a continuous manner by connecting adjacent slats so that they can swing freely in the indoor and outdoor directions, The slat is configured to include upper and lower connecting portions for the swingable connection and a main body portion between the upper and lower connecting portions, 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 in the main body, which is engaged with a locking receiving portion provided in the guide groove. The slat is reinforced by a reinforcing metal fitting having a first reinforcing plate portion fixed to the recessed portion and a second reinforcing plate portion fixed to a tip edge portion on the left-right outer side of the recessed portion, The main body of the slat bulges outward toward the exterior from the center in the left-right direction relative to the recessed portion, while the recessed portion and the tip edge on the outer side in the left-right direction have flat press-formed portions; A shutter device for buildings, characterized in that first and second reinforcing plate portions of a reinforcing metal fitting are fixed to the flat press-processed portions of the concave portion and the tip edge portion, respectively.

2. The guide rail is configured so that the groove width of the guide groove is small at the groove opening side and large at the groove inner side, The slat is configured such that the thickness of the tip edge portion is larger than the groove width of the groove opening side portion but smaller than the thickness of the main body portion, 2. The shutter device for a building according to claim 1, wherein the reinforcing metal fitting has a first reinforcing plate portion and a second reinforcing plate portion integrally formed via a connecting portion at the engaging portion.

3. The slats are formed in such a way that the upper and lower connecting parts are biased toward the interior of the room relative to the main body.

3. The shutter device for a building according to claim 1, wherein the reinforcing metal fitting is attached to the indoor side of the main body.

4. The slats are fitted with a recessed portion and a leading edge, and the recessed portion is inclined toward the interior side of the slats. A vertically long notch is formed in the boundary between the recessed portion and the leading edge, and the upper and lower peripheral portions of the notch are configured as locking portions that lock into the locking receiving portions. A shutter device for buildings as described in claim 3, characterized in that the connecting portion of the reinforcing metal fittings is inclined toward the interior as it approaches the first reinforcing plate portion, and is located approximately at the same position as the engaging portion formed on the slat or close to the outside in the left-right direction.

5. A shutter device for buildings as described in any one of claims 1 to 4, characterized in that the reinforcing fittings are composed of a first reinforcing fitting that extends from the left and right edge portions of the second reinforcing plate portion that protrude beyond the left and right edge portions of the slats to the upper and lower connecting portions of adjacent slats and has a slippage prevention portion that prevents lateral slippage between adjacent slats, and a second reinforcing fitting whose second reinforcing plate portion extends to the slat edge portions and does not have a slippage prevention portion.

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