Building shutter device

Abstract

To simplify the structure of a mechanism of preventing a shutter curtain 3 from falling off from a guide rail 2 when the shutter curtain receives strong wind and is bent in an indoor or outdoor direction.SOLUTION: A structure of preventing a shutter curtain 3 from falling off is simplified by a configuration such that, in a normal winding mode, first and second recess fitting shape parts 5f, 5g are formed on the indoor or outdoor side of each of slats 5 forming the shutter curtain 3, first and second engagement parts 5h, 5i formed in the first and second recess fitting shape parts 5f, 5g are engaged with first and second engagement reception parts 2g, 2h provided on the indoor or outdoor side of the guide rail 2 to prevent the falling-off.SELECTED DRAWING: Figure 7

Description

[Technical Field]

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

[0002] Generally, in order to open and close openings such as entrances and exits of buildings such as buildings and residences, a shutter device for the building is installed which comprises guide rails provided on the left and right sides of the opening, a shutter curtain which is guided up and down on the guide rails to open and close the opening, and a winding body which is arranged above the opening to wind up the shutter curtain.In such shutter devices, the shutter curtain in the closed state can bend significantly when exposed to strong winds that occur during bad weather such as typhoons or heavy rain, and if this bending deformation is large, the shutter curtain can come off the guide rails. Therefore, in order to prevent the shutter curtain from being bent by strong winds and coming off the guide rail, attempts have been made to provide a mechanism to prevent it from coming off between the shutter curtain and the guide rail. As such a mechanism to prevent slipping out, a mechanism has been proposed in which a recessed portion is formed on the outdoor side of the left and right outer edge portions of the slats that make up the shutter curtain, and the left and right outer edge portions of the recessed portion are used as locking portions that lock into locking receiving portions provided on the guide rail when the shutter curtain is bent toward the outdoors due to strong winds (see, for example, Patent Documents 1 and 2). Incidentally, shutter curtains not only bend outdoors when subjected to negative pressure when the wind is blowing outdoors, but also bend indoors when subjected to positive pressure when the wind is blowing indoors. For this reason, a shutter curtain has been proposed that prevents it from slipping off the guide rail when it bends due to positive pressure, not just when subjected to negative pressure as in the prior art (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3962996 [Patent Document 2] Patent No. 5478429 [Patent Document 3] Japanese Patent Application Laid-Open No. 2004-60307 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional devices designed to prevent the shutter curtain from coming loose when subjected to positive or negative pressure use the outer left-right edge of the recessed portion formed on the outdoor side surface of the slat as the locking portion, while first and second locking receiving portions are provided around the outdoor gutter of the guide rail in a state that displaces toward the back of the gutter (left-right direction), and when the shutter curtain is bent and deformed indoors or outdoors, the locking portion's locking mechanism is switched to the first and second locking receiving portions, thereby preventing the shutter curtain from coming loose when it is bent and deformed indoors or outdoors. This was advantageous in that it could prevent the slats from coming loose due to bending deformation indoors or outdoors using a single locking part on the slats, but when the shutter curtain is bent indoors due to positive pressure, it is prevented from coming loose by locking the locking part into a second locking receiving part at the back of the groove while the outdoor edge of the slat abuts the inner surface of the outdoor gutter of the guide rail and the indoor side of the slat is in a tensioned position abutting a mohair pocket part provided at the indoor opening of the guide rail. However, in this type of shutter curtain, in order to prevent the slats from falling out when they are bent indoors due to positive pressure, the slats bend indoors like a lever, with the fulcrum being the part where the outdoor edge of the slat abuts the inner surface of the outdoor gutter of the guide rail, the part where it abuts the mohair pocket being the point of application, and the force being the center part that receives the strong wind, so that a large load acts on the abutment part between the slat and the mohair pocket, which is the point of application.If the indoor side piece of the guide rail is expanded and deformed due to this large load, not only is there a risk that the anti-slip lock will be lost (disengaged), but there is also a risk that the part of the slat that abuts the mohair pocket will be deformed into a recessed shape.To avoid these problems, there are problems that require reinforcement of the guide rail and the slats, and these are the issues 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: a shutter curtain that moves to open and close to separate an opening into front and rear; guide rails that guide the left and right edge portions of the shutter curtain up and down; and a winding body that is provided above the opening and winds up the shutter curtain, wherein the shutter curtain is formed by interlocking adjacent slats in the vertical direction, and the slats have upper and lower interlocking joints that are biased to one side in the front-to-rear direction, and slat bodies that are arranged between the upper and lower interlocking joints and biased to the other side in the front-to-rear direction, and wherein the outer left and right edge portions of the upper and lower interlocking joints are provided with a plurality of interlocking joints. a first recessed portion formed in the slat body, the left-right outer edge of which serves as a first locking portion; a second recessed portion formed in the slat body, the left-right outer edge of which serves as a second locking portion; and when the shutter curtain is bent in the front-to-rear direction by strong winds, the shutter curtain is prevented from slipping out of the guide rail by the first locking portion engaging with a first locking receiving portion provided on one rail edge of the guide rail when the shutter curtain is bent to one side in the front-to-rear direction, and when the shutter curtain is bent to the other side in the front-to-rear direction, the second locking portion engaging with a second locking receiving portion provided on the other rail edge of the guide rail. The invention of claim 2 is a shutter device for a building as described in claim 1, characterized in that the first and second engagement portions are each formed as cutout edge portions with a positional shift in the left-right direction. The invention of claim 3 is a shutter device for a building according to claim 1, characterized in that a reinforcing member for reinforcing the second engaging portion is provided on one side surface of the slat body in the front-to-rear direction. The invention of claim 4 is a shutter device for a building as described in claim 3, characterized in that the second engagement portion is formed further inward in the left-right direction than the first engagement portion, and the reinforcing member is attached to the outer left-right edge portion of the slat body with the inner left-right edge portion positioned further inward in the left-right direction than the first engagement portion. [Effects of the Invention]

[0006] By adopting the invention of claim 1, the shutter curtain is prevented from slipping out of the guide rail when it is bent in the forward / backward direction due to wind pressure. When the shutter curtain is bent in one direction in the forward / backward direction, the first locking portion engages with the first locking receiving portion provided on the rail edge portion on one side of the guide rail, and when the shutter curtain is bent in the other direction in the forward / backward direction, the second locking portion engages with the second locking receiving portion provided on the rail edge portion on the other side of the guide rail.As a result, when the shutter curtain is subjected to positive pressure or negative pressure, it is prevented from slipping out by using separate locks rather than using the principle of leverage, and it is possible to avoid the guide rail expanding, damaging the locking mechanism, or deforming the slats without the need for special reinforcement. By adopting the invention of claim 2, the first and second engagement portions formed on one slat are formed as cutout edge portions that are offset in the left-right direction, which reduces the loss of strength due to the longer distance between the first and second engagement portions compared to when the first and second engagement portions are formed at the same position in the left-right direction. According to the invention of claim 3, the second engagement portion is reinforced by the reinforcing member, thereby increasing the strength of the shutter curtain. By adopting the invention of claim 4, the second locking portion is positioned further inward in the left-right direction than the first locking portion, and the left-right inner edge portion of the reinforcing member is positioned further inward in the left-right direction than the first locking portion.As a result, the first locking portion locks into the first locking receiving portion within the left-right range in which the reinforcing member is attached to the slat body, thereby providing reinforcement by the reinforcing member. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. [Figure 2] (A) and (B) are longitudinal cross-sectional side views of a shutter device with forward winding and reverse winding specifications. [Figure 3] (A)(B)(C) are a front view, a plan view, and a rear view of a slat with a forward winding specification. [Figure 4](A)(B)(C) are a front view, a plan view, and a rear view of a reverse-winding slat. [Figure 5] 1A and 1B are longitudinal cross-sectional side views of the main parts of forward-winding and reverse-winding slats. [Figure 6] 1A and 1B are cross-sectional plan views of the main parts of forward-winding and reverse-winding slats. [Figure 7] 1A, 1B, and 1C are cross-sectional plan views of the main parts of a forward-rolling shutter curtain in its normal state, when subjected to positive pressure, and when subjected to negative pressure. [Figure 8] 1A, 1B, and 1C are longitudinal plan views of the main part of a forward-rolling shutter curtain, showing the normal state, the state when subjected to positive pressure, and the state when subjected to negative pressure. [Figure 9] 1A, 1B, and 1C are cross-sectional plan views of the main part of a reverse-winding shutter curtain in its normal state, when subjected to positive pressure, and when subjected to negative pressure. [Figure 10] 1A, 1B, and 1C are longitudinal plan views of the main part of a reverse-winding shutter curtain, showing the state when it is in its normal state, when it is subjected to positive pressure, and when it is subjected to negative 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 window shutter device installed in a sash window, which is an example of an opening E in a building, and the shutter device 1 is configured using guide rails 2 installed on the left and right of a window frame W that forms the opening E, a shutter curtain 3 that is guided up and down by the guide rails 2 to open and close the opening E, and a winding body (winding drum, winding wheel) 4 that is arranged above the opening E and winds the shutter curtain 3 in a spiral shape, and the shutter curtain 3 is formed into a series by interlocking Y between adjacent slats 5 that are long in the left-right direction. In the figure, the reference numeral 6 denotes a rail for the sash. The present embodiment is a manual type without an electric opener, but it goes without saying that an electric type can also be used. The winding body 4 is housed inside the shutter case 4a.

[0009] In this case, the shutter device 1 may be of a forward winding type, as shown in Figure 2(A), in which the winding body 4 is arranged in a state where it is biased toward the indoor (room) side relative to the guide rail 2 (opening E), and the shutter curtain 3 is wound around the winding body 4 so that the outdoor side 3a is on the outer periphery of the spiral, or of a reverse winding type, as shown in Figure 2(B), in which the winding body 4 is arranged in a state where it is biased toward the outdoor (room) side relative to the guide rail 2, and the shutter curtain 3 is wound around the winding body 4 so that the indoor side 3b is on the outer periphery of the spiral, and the present invention can be used for both types.

[0010] Furthermore, the slats 5 that constitute the shutter curtain 3 are configured to include upper and lower interlocking joints 5a, 5b that are biased to one side in the front-to-rear direction relative to the shutter core X of the shutter curtain 3 that moves up and down on the guide rail 2, a slat abdomen 5c that is arranged between the upper and lower interlocking joints 5a, 5b and is biased to the other side in the front-to-rear direction relative to the shutter core X in a concave manner, and upper and lower connecting parts 5d, 5e that connect these upper and lower interlocking joints 5a, 5b and slat abdomens 5c to each other. When the shutter device 1 is of forward winding specification, the slat 5 is configured so that the upper and lower interlocking joints 5a, 5b are biased toward the indoor side (one side in the front-to-back direction) and the slat body 5c is biased toward the outdoor side (the other side in the front-to-back direction) relative to the shutter core X, as shown in Figure 8 (A).In this case, the protruding surface of the slat body 5c becomes the outdoor side 3a of the shutter curtain 3, and the recessed surface becomes the indoor side 3b, and the indoor side 3b becomes the inner spiral surface and is wound around the winding body 4.

[0011] In contrast, when the shutter device 1 is of reverse winding specification, the slat 5 is configured so that the upper and lower interlocking joints 5a, 5b are biased toward the outdoor side (one side in the front-to-back direction) relative to the shutter core X, and the slat body 5c is biased toward the indoor side (the other side in the front-to-back direction), as shown in Figure 10 (A).In this case, the recessed side of the slat body 5c becomes the outdoor side 3a of the shutter curtain 3, the protruding side becomes the indoor side 3b, and the outdoor side 3a becomes the inner spiral side and is wound around the winding body 4. In addition, some shutter devices are reverse-winding type, with the protruding side of the slat abdomen 5c facing outdoors and wound so that the protruding side faces the inside of the spiral, and the way in which the shutter curtain is wound around the winding body can be set appropriately as needed. In this way, when the shutter device 1 is of forward winding specification or reverse winding specification, for example, the meaning of "one side in the front-to-rear direction" in the present invention is intended to be the indoor side in the forward winding specification and the outdoor side in the reverse winding specification, so the inside and outside are reversed. However, in the present invention, it can be expressed as something that is common regardless of whether it is of forward winding specification or reverse winding specification, so it will be described as such in the claims, and in the embodiments it will be distinguished by the description "indoor / outdoor".

[0012] Furthermore, the connection structure of the interlock connection Y formed by the upper and lower interlock connection parts 5a, 5b is the same for both the forward winding specification and the reverse winding specification (although the specific shape is not the same), and this connection structure will be further explained next. The upper and lower interlocking joints 5a, 5b are both curved in an arc shape with an open tip edge, and as mentioned above, in this embodiment, there is a difference between the forward winding specification and the reverse winding specification in that the bias of the slat body 5c is on the outdoor side or the indoor side. In contrast, in both the forward winding and reverse winding specifications, the upper interlocking connection 5a of the slat 5 is curved downward toward the outdoor side, extending from the upper end of the slat body 5c through the upper connecting portion 5d to the upper edge from the indoor side, while the lower interlocking connection 5b is curved upward toward the indoor side, extending from the lower end of the slat body 5c through the lower connecting portion 5e to the lower edge from the outdoor side, and both the forward winding and reverse winding specifications have the same configuration. Incidentally, in this embodiment, the adjacent slats 5 on the top and bottom are configured so that their relative movement in the left-right direction is restricted by crimping and fixing Z the interlock connection Y portions at both left-right end edges, but since this configuration is a well-known technology, further explanation will be omitted.

[0013] The interlock connection Y when the vertically adjacent slats 5 configured in this way are connected to each other is configured such that the lower interlock connection portion 5b of the upper slat 5 overlaps (covers) the upper interlock connection portion 5a of the lower slat 5 in a spiral shape from the outdoor side, and the upper and lower slats 5 are connected to each other so as to be able to swing freely in the indoor and outdoor directions. By interlocking the upper and lower slats 5 in this way, when rainwater adhering to the outdoor side 3a of the shutter curtain 3 flows down, the rainwater flows through the lower interlock connection portion 5b of the upper slat 5. The structure is such that the rainwater flows directly from the outdoor side surface 3a at the 5b portion onto the outdoor side surface 3a at the upper interlock joint portion 5a (or upper connecting portion 5d) of the lower slat 5, and care is taken to prevent the flowing rainwater from accumulating (retaining) at the interlock joint Y portion without flowing down from the lower interlock portion 5b of the upper slat 5, as would be the case if the rainwater were to flow down the indoor side surface 3b of the shutter curtain 3.This type of connection using interlock joint Y has the same structure regardless of whether the specification is forward winding or reverse winding. As described above, the structures of the shutter curtain 3 in both forward and reverse winding specifications have been explained. However, since the present invention can be implemented in the same way in either specification, we will first explain the forward winding specification, and then explain the reverse winding specification. However, we will keep the reverse winding specification brief to avoid duplication.

[0014] First, in the forward-winding shutter device 1, first and second recessed portions 5f, 5g are formed at both left and right edge portions of the slat 5. The first recessed portion 5f is formed by interlocking cutouts 5fa, 5fb cut out to a predetermined depth with a predetermined left-right width in the indoor side portions of the upper and lower interlocking joints 5a, 5b, forming a recessed portion facing the outdoor side by interlocking with Y, and the outer left-right edge portion of the first recessed portion 5f is configured as a first locking portion 5h that is the cutout edge portion. Incidentally, the first recessed portion 5f is strong because it is formed at the interlocking joint Y portion where the upper and lower interlocking joints 5a, 5b are formed in the interlocking joint Y portion where the slat material (steel) is stacked in two layers in an arc shape, and there is no current demand for increased strength.

[0015] In contrast, the second concave portion 5g (corresponding to the "concave portion" of the present invention) is formed in the slat body 5c, and therefore requires increased strength beyond that of the current state. However, the second concave portion 5g is formed by bending (curving) the slat body 5c in a concave shape toward the indoor side, and by cutting (cutting) the outer left-right portions of the bottom plate portion 5j that is bent in a concave shape so that a gap (gap, void) S that penetrates from indoors to outdoors is present. By configuring in this manner, the second concave portion 5g of this embodiment has the second engaging portion 5i formed in a state where the outer left-right edge portions become cut-out edge portions where the slat body 5c arranged on the outer left-right side is cut out, while leaving the bottom plate portion 5j in the inner left-right portion. The second locking portion 5i, which is the cutout edge of the slat body 5c, and the bottom plate portion 5j of the second recessed portion 5g, which is the cutout edge located inside the left-right direction with a gap S from the second locking portion 5i, are configured to be separated in a stepped manner in the indoor-outdoor direction (front-to-back direction) with a gap S in the left-right direction. The first recessed fitting portion 5f and the second recessed mating portion 5g configured in this manner are configured such that the first locking portion 5h, which is the outer edge portion in the left-right direction, is positioned outward in the left-right direction from the second locking portion 5i, while the inner edge portions in the left-right direction are both inclined, with the first recessed fitting portion 5f being positioned outward in the left-right direction from the second recessed fitting portion 5g.

[0016] Furthermore, a reinforcing member 7 is attached to the slat body 5c at a position outside the second recessed portion 5g in the left-right direction. The reinforcing member 7 is made of a synthetic resin material such as ABS, POM, nylon, etc., and is arranged in a state where it is fitted into the indoor side of the slat body 5c at a position outside the second engaging portion 5i in the left-right direction, and is attached and fixed to the recessed side surface of the slat body 5c via fasteners 7a such as rivets or screws. The left-right outer edge 7b of the reinforcing member 7 extends outward in the left-right direction beyond the left-right outer edge 5k of the slat 5, and this extended left-right outer edge 7b of the reinforcing member also serves as a cushioning material with the function of abutting against the groove bottom 2b of the rail groove 2a when the shutter curtain 3, which is fitted into the rail groove (guide groove) 2a to be guided up and down by the guide rail 2, moves (misaligns) in the left-right direction, thereby preventing the left-right outer edge 5k of the slat 5 from directly abutting (colliding) with the groove bottom 2b.This reduces the abutment sound (abnormal noise, noise, collision sound) that occurs when the shutter curtain 3 is misaligned in the left-right direction and abuts against the groove bottom 2b, and avoids damage to the left-right outer edge 5k of the slat 5 and the groove bottom 2b.

[0017] Furthermore, the left-right inner edge portion 7c of the reinforcing member 7 thus provided is configured to be located at the same left-right position as the second engaging portion 5i, thereby forming a two-layered reinforcing structure in which the plate material of the slat body 5c is the outer layer of the second engaging portion 5i and the left-right inner edge portion 7c of the reinforcing member is the inner layer covered by the slat body 5c, thereby reinforcing the second engaging portion 5i. In this case, the reinforcing member 7 is thicker than the plate thickness of the slat 5, thereby providing strong reinforcement, and furthermore, in this structure, the thick reinforcing member 7 is arranged in a solid state (filling) in the slat body 5c, thereby providing excellent reinforcing function. On the other hand, the reinforcing member 7 is arranged such that the first locking portion 5h, which is located further outward in the left-right direction than the second locking portion 5i, is positioned between the left and right inner and outer edge portions 7c, 7b in the left-right direction.

[0018] The shutter curtain 3 formed using the slats 5 configured in this manner is loosely fitted into the rail groove 2a of the guide rail 2, and first and second mounting pockets 2e and 2f are respectively formed protrudingly on the indoor and outdoor rail edge portions 2c and 2d of the rail groove 2a at the groove opening end of the rail groove 2a for attaching mohair 8. The end edges 2g and 2h on the inner side (outside in the left and right directions) of the first and second mounting pockets 2e and 2f serve as first and second locking receiving portions 2g and 2h, and when the shutter curtain 3 is bent in the indoor / outdoor direction, the first locking portion 5h locks into the first locking receiving portion 2g, and the second locking portion 5i locks into the second locking receiving portion 2h, so that the shutter curtain 3 is prevented from slipping out of the guide rail 2 by each separate locking. As a result, when the guide rail 2 receives the load of bending of the shutter curtain 3 due to a strong wind, the contact point between the slat 5 and the opening edge of the guide rail 3 does not function as the point of application as in the case of employing the conventional principle of leverage, so not only is the expansion of the guide rail 2 restricted in the indoor / outdoor direction, but even if the guide rail 2 expands, the mating portions 5f, 5g formed on the slat 5 move in tandem with the expansion of the guide rail 2, preventing the lock from coming loose. This eliminates the problems that occur when the aforementioned conventional retaining locking structure using the lever of the retaining mechanism is employed, such as the guide rail 2 expanding under the load of bending of the shutter curtain 3 due to a strong wind, causing the retaining lock to come loose or the portion of the slat that contacts the guide rail 2 to deform, and contributes to increased strength. Incidentally, in this case, the first locking receiving portion 2g is configured as the edge of the extension portion 2i that extends outward in the left-right direction from the rear edge of the groove of the first mounting pocket 2e, but it goes without saying that, like the second locking receiving portion 2h, it may also be the rear edge of the groove of the first mounting pocket 2e.

[0019] Specifically, under normal conditions, the shutter curtain 3 opens and closes with its left and right end edges loosely fitted into the rail groove 2a of the guide rail 2, with its indoor / outdoor central portion positioned approximately at the shutter core X, but in this normally closed state, the shutter curtain 3 is spaced apart indoors and outdoors from the first and second mounting pockets 2e, 2f, and the left and right outer end edges 7b of the reinforcing member 7 are also spaced apart from the groove bottom 2b. In this case, the first and second locking portions 5h, 5i formed on the slat 5 are both configured to be located deeper in the groove (outside in the left and right direction) than the first and second locking receiving portions 2g, 2h.

[0020] When the shutter curtain 3 in the closed state is subjected to a positive wind directed indoors and bends indoors, the shutter curtain 3 assumes an inclined position with the inside (center) of the left-right direction displaced indoors and the outside edge 5k of the left-right direction displaced outdoor, resulting in a bending deformation on the side where the upper and lower interlock coupling portions 5a, 5b approach the first locking receiving portion 2g, and this bending deformation causes the outside edge 5k of the slat 5 to move inward in the left-right direction. When this bending deformation becomes large, the first locking receiving portion 2g enters the first recessed portion 5f, and finally the first locking portion 5h locks (abuts) against the first locking receiving portion 2g outward in the left-right direction, restricting further bending deformation and thereby preventing the shutter curtain 3 from coming off the guide rail 2.

[0021] On the other hand, when the shutter curtain 3 is bent outdoors due to a negative wind blowing in the opposite direction, the shutter curtain 3 assumes an inclined position in which the inner side (center side) in the left-right direction is displaced outdoors and the outer side edge 5k in the left-right direction is displaced indoors, resulting in a bending deformation on the side where the slat body 5b approaches the second locking receiving portion 2h, and this bending deformation causes the outer side edge 5k in the left-right direction of the slat 5 to move inward in the left-right direction while in this inclined position. When this bending deformation becomes large, the second locking receiving portion 2h enters the second recessed portion 5g, and finally the second locking portion 5i locks (abuts) against the second locking receiving portion 2h from the outside in the left-right direction, restricting further bending deformation and thereby preventing the shutter curtain 3 from coming off the guide rail 2.

[0022] In this way, when the shutter curtain 3 is bent toward the outdoors due to negative pressure, the second locking portion 5i provided on the slat body 5c engages with the second locking receiving portion 2h on the outdoors side provided on the guide rail 2, preventing the shutter curtain 3 from coming loose.In this case, the second locking portion 5i is reinforced with a two-layer structure in which the second locking portion 5i is the outer layer and the left-right inner edge portion 7c of the reinforcing member 7 is the inner layer.As a result, the strength is increased compared to when the second locking receiving portion 2h is locked and supported by the conventional second locking portion 5i alone, preventing it from coming loose.However, it is of course possible to provide a separate reinforcing member if necessary to reinforce the second locking portion 5i. Incidentally, the left-right inner edge portions 5m, 5n of the first and second locking portions 5h, 5i are inclined surfaces that widen outward in the front-to-back direction as they move inward in the left-to-right direction, which is intended to prevent the first and second locking receiving portions 2g, 2h from getting caught on the first and second recessed portions 5f, 5g when the shutter curtain 3 is bent by strong winds and returns to its original position, thereby preventing the smooth return to the original position from being impaired.

[0023] In the present embodiment configured as described above, in the shutter device 1 configured with the shutter curtain 3 that moves to open and close to separate the opening E into front and rear, when the shutter device 1 is of forward winding type, a first recessed portion 5f is formed at the outer edge portion in the left-right direction of the joint portion where the upper and lower adjacent slats 5 to form the shutter curtain 3 are interlocked Y, and the outer edge portion in the left-right direction of the first recessed portion 5f is made into a first locking portion 5h, while a second recessed portion 5g is formed at the outer edge portion in the left-right direction of the slat body portion 5c, and the outer edge portion in the left-right direction of the second recessed portion 5g is made into a first locking portion 5h. The outer edge portion is the second locking portion 5i, and the prevention of the shutter curtain 3 coming off the guide rail 2 when it is bent in the forward / backward direction due to strong winds is achieved by the first locking portion 5h engaging with the first locking receiving portion 2g provided on the indoor side of the guide rail 3 when the shutter curtain 3 is bent toward the indoor side due to positive pressure, as shown in Figures 7 and 8, and by the second locking portion 5i engaging with the second locking receiving portion 2h provided on the outdoor side of the guide rail when the shutter curtain is bent toward the outdoor side due to negative pressure. As a result, when the shutter curtain 3 is bent in the indoor / outdoor direction by a strong wind, it is prevented from coming off the guide rail 2 by not using the same locking part that prevents it from coming off when it is subjected to positive pressure, as in the conventional device described above, which uses the principle of leverage to prevent it from coming off when it is subjected to negative pressure, but by locking it into the first locking receiving part 2g of the separately provided first locking part 5h.This prevents the guide rail from expanding under the load when it is prevented from coming off, which could damage the locking engagement (disengage) or cause the slats to deform, while improving the strength of the locking mechanism.

[0024] Furthermore, in this case, the first and second locking portions 5h, 5i formed on the slat 5 are each formed as cutout edge portions with their positions shifted in the left-right direction, so the distance between the first and second locking portions 5h, 5i is longer than when the first and second locking portions 5h, 5i are formed at the same position in the left-right direction, and this longer distance ensures greater strength when the first and second locking portions 5h, 5i are locked with the first and second locking receiving portions 2g, 2h, respectively.

[0025] Furthermore, in this device, a reinforcing member 7 is provided on the slat body 5c to reinforce the second engagement portion 5i, and the second engagement portion 5i is reinforced by the reinforcing member 7, thereby increasing the strength of the shutter curtain 3's anti-slip function. Furthermore, in this case, the second locking portion 5i is positioned laterally inward from the first locking portion 5h, and the left-right inner edge portion 7c of the reinforcing member 7 is attached to the left-right outer edge portion of the slat body 5c in a state where it is positioned laterally inward from the first locking portion 5h.Therefore, the first locking portion 5h locks onto the first locking receiving portion 2g within the left-right range in which the reinforcing member 7 is attached to the slat body 5c, thereby providing reinforcement by the reinforcing member 7.

[0026] On the other hand, when the shutter device 1 is of a reverse winding specification, as shown in Figures 9 and 10, the prevention of the shutter curtain 3 from slipping out of the guide rail 2 when it is bent in the forward and backward directions due to strong winds is achieved by the second locking portion 5i engaging with the first locking receiving portion 2g provided on the indoor side of the guide rail 3 when the shutter curtain 3 is bent indoors due to positive pressure, and by the first locking portion 5h engaging with the second locking receiving portion 2h provided on the outdoor side of the guide rail when the shutter curtain is bent outdoor due to negative pressure.This is the same as in the case of a forward winding specification, except that the locking relationship between the second and first locking portions 5i and 5h on the slat 5 side that engage with the first and second locking receiving portions 2g and 2h formed on the guide rail 2 side is reversed, and therefore, when the present invention is implemented, it can be implemented in the same way in either a forward winding specification or a reverse winding specification.

[0027] In other words, when a reverse-winding shutter curtain 3 is subjected to positive pressure, the second locking portion 5i on the indoor side of the slat 5 engages with the first locking receiving portion 2g on the indoor side of the guide rail 2, preventing the shutter curtain 3 from slipping off from the guide rail 2. Conversely, when the shutter curtain 3 is bent outdoors due to negative pressure caused by a strong wind blowing outdoors, the first locking portion 5h on the outdoor side of the slat 5 engages with the second locking receiving portion 2h on the outdoor side of the guide rail 2, preventing the shutter curtain 3 from slipping off from the guide rail 2 both indoors and outdoors. Incidentally, in explaining the reverse winding specification, the guide rail 2 is explained using the same one as in the forward winding specification, so the first locking receiving portion 2g on the indoor side corresponds to the "first locking receiving portion" of the present invention, and the second locking receiving portion 2h on the outdoor side corresponds to the "first locking receiving portion" of the present invention. The terms "first" and "second" are used for convenience to distinguish between the two sets of "locking portion" and "locking receiving portion," and of course, should not be construed as being limited to the description of the above embodiment. [Industrial Applicability]

[0028] The present invention can be used as a shutter device for a building that is installed to open and close an opening such as an entrance or exit of a building such as a building or a house. [Explanation of symbols]

[0029] 1. Shutter device 2 guide rails 2a Rail groove 2g First locking part 2h Second locking part 3. Shutter Curtain 5 slats 5a Upper interlock joint 5b Lower interlock joint 5c Slatted abdomen 5f First recessed part 5g Second recessed part 5h First locking part 5i Second locking part 7 Reinforcement members X shutter core Y interlocking coupling

Claims

1. The shutter curtain is opened and closed to separate the opening into front and rear sections, and guide rails guide the left and right edge portions of the shutter curtain up and down. The shutter curtain is provided above the opening and is wound up by a winding body. The shutter curtain is constructed by interlocking adjacent slats vertically, In a shutter device for a building, the slat is configured to have upper and lower interlocking joints biased to one side in the front-to-rear direction, and a slat body portion disposed between the upper and lower interlocking joints and biased to the other side in the front-to-rear direction, A first recess is formed at an outer edge of the upper and lower interlock coupling parts in the left and right direction, and the outer edge of the first recess is a first locking part. A second recess is formed in the outer edge of the slat body in the left-right direction, and the outer edge of the second recess is used as a second locking portion. When the shutter curtain is bent forward and backward due to strong wind, the shutter curtain is prevented from coming off the guide rail. When the shutter curtain is bent to one side in the front-rear direction, the first locking portion is locked to a first locking receiving portion provided on one side of the rail of the guide rail, - A shutter device for a building, characterized in that when the shutter curtain is bent to the other side in the forward / backward direction, the second engagement portion engages with a second engagement receiving portion provided on the other rail edge portion of the guide rail.

2. 2. The building shutter device according to claim 1, wherein the first and second engagement portions are formed as cut-out edge portions with a positional deviation in the left-right direction.

3. 2. A shutter device for a building according to claim 1, characterized in that a reinforcing member for reinforcing the second engagement portion is provided on one side surface of the slat body in the front-to-rear direction.

4. A shutter device for a building as described in claim 3, characterized in that the second engagement portion is formed laterally inward from the first engagement portion, and the reinforcing member is attached to the laterally outer edge portion of the slat body with the laterally inner edge portion positioned laterally inward from the first engagement portion.

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