Building shutter device

Abstract

To improve the ability of a shutter curtain 3 to prevent it from falling off from a guide rail 2 when the shutter curtain receives strong wind and is bent.SOLUTION: In order to prevent falling-off by forming second recess fitting shaped parts 5g in each of slats 5 forming a shutter curtain 3 and making second engagement parts 5i formed in the second recess fitting shaped parts 5g engage with second engagement reception parts 2h provided on a guide rail 2 side, reinforcing members 7 are provided in the second fitting recesses 5g to improve engagement of the second engagement parts 5i with the second engagement reception parts 2h.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to the technical field of 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. [Background technology]

[0002] Generally, in order to open and close openings such as entrances and exits of buildings such as buildings and houses, a shutter device for a building is installed which comprises guide rails on the left and right 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 roll 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 the bending deformation of the shutter curtain becomes too great in this case, the shutter curtain can come out of the guide rails. Therefore, in order to prevent the shutter curtain from being bent by strong winds and coming out of the guide rail, attempts have been made to provide a mechanism for preventing the shutter curtain from coming out of the guide rail. As such an anti-slip mechanism, a mechanism has been proposed in which a recessed portion is formed on the left-right outer edge of the slats that make up the shutter curtain, and the left-right outer edge of the recessed portion serves as a locking portion that locks into a locking receiving portion provided on the guide rail when the shutter curtain is deflected in the indoor / outdoor direction by a strong wind, thereby preventing the shutter curtain from falling off (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-60307 A Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned anti-slip mechanisms are effective and widely used in the case of lightweight shutter devices such as window shutters; however, perhaps due to the effects of recent global warming, there has been a tendency for weather conditions to worsen, with larger typhoons and more severe torrential rains. As a result, it is predicted that the anti-slip mechanisms for shutter curtains will not be strong enough if they are configured so that the locking parts are the edge parts of the recessed portions formed in the slats. As a result, there is a need to take measures to increase strength beyond the current level, and this is the problem that this invention aims to solve. [Means for solving the problem]

[0005] The present invention has been created in view of the above-mentioned circumstances and with the objective of solving these problems. The invention of claim 1 provides a shutter device for a building, comprising a shutter curtain which opens and closes to separate an opening into front and rear, a guide rail which guides the left and right edge portions of the shutter curtain in an up and down motion, and a winding body which is provided above the opening and winds up the shutter curtain, the shutter curtain being configured by interlocking adjacent slats one above the other, the shutter curtain being configured to have recessed portions formed at the outer left and right edge portions of the slats, the outer left and right edge portions of the recessed portions being used as locking portions, and when the shutter curtain is deflected in the front and rear directions by a strong wind, the shutter curtain is prevented from coming off the guide rail by the locking portions locking with locking receiving portions provided on the guide rail, the locking portions being configured to have reinforcing members on the slats for reinforcing the locking portions. The slat is configured to include upper and lower interlocking joints biased toward one side in the front-rear direction, and a slat body portion disposed between the upper and lower interlocking joints and biased toward the other side in the front-rear direction, the recessed portion is formed in the slat body portion, and the reinforcing member is attached in a state of being fitted into one side surface in the front-rear direction of the slat body portion, located on the outer edge side in the left-right direction from the recessed portion. The shutter device for a building is characterized by the above. The invention of claim 2 is as follows: In a shutter device for a building, the shutter curtain is provided with a shutter curtain that moves to open and close to separate an opening into front and rear, a guide rail that guides 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, and the shutter curtain is configured by interlocking adjacent slats one above the other. In this configuration, a recessed portion is formed at the outer left and right edge portion of the slat, and the outer left and right edge portion of the recessed portion serves as a locking portion, so that when the shutter curtain is deflected in the front and rear direction by a strong wind, the shutter curtain is prevented from coming off the guide rail by the locking portion locking with a locking receiving portion provided on the guide rail. In this configuration, a reinforcing member for reinforcing the locking portion is attached to the outer left and right edge portion of the slat, closer to the recessed portion, The reinforcing member is It is thicker than the slats and is made of synthetic resin. This shutter device for buildings is characterized in that its left-right outer edge portion extends outward beyond the left-right outer edge portions of the slats, and acts as a cushioning material that abuts against the bottom of the rail groove of the guide rail when the shutter curtain moves biased left-right. Claim 3The invention of claim 1, wherein the recessed portion is formed by bending the slat body toward one side in the front-rear direction into a recessed shape, by cutting out a gap, or by cutting out a portion of the slat body bent into a recessed shape on the side of the locking portion into a gap. 1 or 2 1 is a shutter device for a building as described above. Claim 4 The invention is characterized in that the locking portion is configured at the cutout edge portion by forming a gap in the recessed portion, and the reinforcing member is configured so that the inner edge portion in the left-right direction is located at the locking portion position or extends beyond the locking portion toward the gap side. 3 The shutter device for a building according to any one of the above items. Claim 5 The invention of claim 1 is characterized in that, when the reinforcing member is provided with an extension portion extending toward the gap side, the inner edge portion of the extension portion in the left-right direction is inclined toward the outside in the left-right direction toward one side in the front-rear direction. 4 1 is a shutter device for a building as described above. Effect of the Invention

[0006] By adopting the invention of claim 1, the shutter curtain is prevented from slipping off the guide rail when it is bent due to wind pressure by using the left and right outer edge portions of the recessed portions formed at the left and right outer edge portions of the slats as locking portions which lock into locking receiving portions provided on the guide rail, and the slats are provided with a reinforcing member for reinforcing the locking portions, thereby reinforcing the locking portions. Moreover, In the case where the recessed portion is formed in the slat body, the reinforcing member is attached in a state where it fits inside the slat body, so that the reinforcing member can be attached in a compact state where it does not protrude from the slat. Claim 2 By making it an invention of To prevent the shutter curtain from slipping off the guide rail when it is bent due to wind pressure, the left and right outer edge portions of the recessed portions formed at the left and right outer edge portions of the slats serve as locking portions that engage with locking receiving portions provided on the guide rail.A reinforcing member is provided on the slats to reinforce the locking portions, thereby reinforcing the locking portions. Moreover, The reinforcing member can also serve as a shock absorbing material that abuts against the rail groove of the guide rail when the shutter curtain is biased left or right, thereby making it possible to reduce the number of parts. Claim 3 By adopting this invention, the recessed portion can be formed by bending the slat body toward one side in the front-to-rear direction into a recessed shape, by cutting out a gap, or by bending the slat body into a recessed shape but cutting out the portion on the engaging portion side so as to form a gap, which increases the freedom in forming the recessed portion. Claim 4 By adopting this invention, when the recessed portion is formed to have a gap, the left-right inner edge portion of the reinforcing member is located at the engagement portion position or is arranged in a state where it extends beyond the engagement portion toward the gap side, thereby making the reinforcement of the engagement portion more reliable. Claim 5 By adopting this invention, when the left-right inner edge portion of the reinforcing member has an extending portion that extends beyond the locking portion, the left-right inner edge portion of the extending portion is inclined toward the left-right outward direction toward one side in the front-to-rear direction, so that the locking with the locking receiving portion is more secure and the function of preventing the shutter curtain from slipping out of the guide rail is improved. [Brief description of the drawings]

[0007] [Figure 1] FIG. [Diagram 2] 1A and 1B are longitudinal cross-sectional side views of a shutter device with forward winding and reverse winding specifications. [Diagram 3] 1A, 1B, and 1C are front, plan, and rear views of a forward-wound slat. [Figure 4] (A), (B), and (C) are a front view, a plan view, and a rear view of a reverse-winding slat. [Diagram 5] 13(A) and (B) are longitudinal 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 essential parts of a forward-rolling shutter curtain in its normal state, when it is subjected to positive pressure, and when it is subjected to negative pressure. [Figure 8]1A, 1B, and 1C are longitudinal plan views of the essential parts of a forward-rolling 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. [Figure 9] 1A, 1B, and 1C are cross-sectional plan views of the main parts of a reverse-rolling 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. [Figure 10] 1A, 1B, and 1C are longitudinal plan views of the essential parts of a reverse-rolling 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. [Figure 11] 13A and 13B are longitudinal sectional views of essential parts showing the attached state of reinforcing members according to second and third embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 provided in a sash window, which is an example of an opening E of a building, and the shutter device 1 is configured using guide rails 2 provided on the left and right of a window frame W that becomes 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 disposed above the opening E and winds up the shutter curtain 3 in a spiral shape, and the shutter curtain 3 is formed in a continuous shape by interlocking and connecting Y adjacent ones above and below of long slats 5 that are long in the left-right direction. In the figure, 6 is a rail for the sash. In addition, the present embodiment is a manual type without an electric opening and closing mechanism, but it goes without saying that an electric type can be used in the same way. In addition, the winding body 4 is installed 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 in which 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 in which it is biased toward the outdoor (outdoor) 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 adopted for both types.

[0010] Furthermore, the slat 5 for constituting the shutter curtain 3 is configured to include upper and lower interlock connection portions 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 interlock connection portions 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 portions 5d, 5e that connect these upper and lower interlock connection portions 5a, 5b and the 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-rear direction) and the slat midsection 5c is biased toward the outdoor side (the other side in the front-to-rear direction) relative to the shutter core X, as shown in Figure 8 (A).In this case, the protruding surface of the slat midsection 5c becomes the outdoor side 3a of the shutter curtain 3, 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-rear direction) and the slat body 5c is biased toward the indoor side (the other side in the front-to-rear direction) relative to the shutter core X, as shown in Figure 10 (A).In this case, the concave side surface of the slat body 5c becomes the outdoor side surface 3a of the shutter curtain 3, the protruding side surface becomes the indoor side surface 3b, and the outdoor side surface 3a becomes the inner spiral surface and is wound around the winding body 4. In addition, some shutter devices are of the reverse winding specification, and are wound so that the protruding surface of the slat abdomen 5c faces outdoors and the protruding surface faces inside the spiral, and the manner in which the shutter curtain is wound around the winding body is 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, resulting in the inside and outside being reversed; however, since the present invention can be expressed as something common to both forward winding and reverse winding specifications, it will be described as such in the claims, and the distinction will be made in the embodiments by describing it as "indoors and outdoors".

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

[0013] The interlock connection Y when the vertically adjacent slats 5 thus configured are connected to each other is configured such that the lower interlock connection portion 5b of the upper slat 5 is spirally overlapped (covered) with the upper interlock connection portion 5a of the lower slat 5 from the outdoor side, allowing the slats to swing freely in the indoor and outdoor directions. By interlocking the upper and lower slats 5 together in this manner, when rainwater adhering to the outdoor side surface 3a of the shutter curtain 3 flows down, the rainwater flows through the lower interlock connection portion 5a of the upper slat 5 and the lower interlock connection portion 5b of the upper slat 5. The rainwater is configured to flow down directly from the outdoor side surface 3a of the upper interlock joint part 5a (or upper connecting part 5d) of the lower slat 5 from the outdoor side surface 3a of the upper interlock joint part 5a (or upper connecting part 5d) of the lower slat 5, so that the flowing down rainwater does not accumulate (remain) at the interlock joint Y part without flowing down from the lower interlock part 5b of the upper slat 5, as would happen if the rainwater were to flow down the indoor side surface 3b of the shutter curtain 3.This type of connection by interlock joint Y has the same configuration 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, the forward winding specification will be explained first, and then the reverse winding specification will be explained. However, the reverse winding specification will be explained briefly to avoid duplication.

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

[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 a strength that is greater than that of the current state. However, the second concave portion 5g is formed by bending (curving) the slat body 5c toward the indoor side in a concave shape, and by cutting (cutting) the outer left-right portion of the bottom plate portion 5j that is bent in a concave shape to form a gap (gap, void) S that penetrates from indoor to outdoor. By configuring in this manner, the second concave portion 5g of the present embodiment has the second engagement portion 5i formed in a state in which the outer left-right edge portion becomes a notched edge portion formed by cutting out the slat body 5c arranged on the outer left-right side, while leaving the bottom plate portion 5j in the inner left-right portion. The second engagement portion 5i, which is the cutout edge portion of the slat body 5c, and the bottom plate portion 5j of the second recessed portion 5g, which is the cutout edge portion located on the inside in the left-right direction with a gap S from the second engagement 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 concave fitting portion 5f and the second concave engagement portion 5g thus configured are configured such that the first engagement portion 5h, which is the outer edge portion in the left-right direction, is positioned outward in the left-right direction from the second engagement portion 5i, while the inner edge portions in the left-right direction are both inclined, with the first concave fitting portion 5f being positioned outward in the left-right direction from the second concave 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 or the like, and is arranged in a state where it is fitted into the slat body 5c so as to abut against the indoor side surface 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 a cushioning function that prevents the left-right outer edge 5k of the slat 5 from directly abutting (colliding) 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 (displaces) in the left-right direction. This makes it possible to reduce the abutment sound (abnormal sound, noise, collision sound) that occurs when the shutter curtain 3 displaces left-right and abuts against the groove bottom 2b, and to avoid damage to the left-right outer edge 5k and the groove bottom 2b of the slat 5.

[0017] Furthermore, the left-right inner edge 7c of the reinforcing member 7 thus provided is configured to be located at the same left-right position as the second locking portion 5i, so that the second locking portion 5i has a two-layered inner-outer reinforcing structure in which the plate material of the slat body 5c is the outer layer and the left-right inner edge 7c of the reinforcing member is the inner layer covered by the slat body 5c, thereby reinforcing the second locking portion 5i. In this case, the reinforcing member 7 is thicker than the plate thickness of the slat 5, so that strong reinforcement can be achieved, and furthermore, in this structure, the thick reinforcing member 7 is disposed in a solid state (filling the slat body 5c), so that it is possible to provide excellent reinforcing function. On the other hand, the reinforcing member 7 is arranged such that the first engagement portion 5h, which is located laterally outboard of the second engagement portion 5i, is located between the left and right inner and outer end edges 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, 2f are respectively formed in a protruding manner on the indoor and outdoor rail edge portions 2c, 2d of the rail groove 2a, located at the groove opening end portion of the rail groove 2a, for attaching the mohair 8. The end edges 2g, 2h on the inner side (outside in the left-right direction) of the first and second mounting pockets 2e, 2f serve as first and second locking receiving portions 2g, 2h, so that 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 separate locking. As a result, when the guide rail 2 receives the load of the shutter curtain 3 bending in response to a strong wind, the contact position between the slat 5 and the opening edge of the guide rail 3 does not function as the point of action as in the case of adopting 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 fitting parts 5f, 5g formed on the slat 5 move following the expansion of the guide rail 2, preventing the lock from coming off. This eliminates the problem of the lock coming off or the part of the slat abutting the guide rail 2 being deformed when the guide rail 2 expands under the load of the shutter curtain 3 bending in response to a strong wind, as in the case of adopting the conventional anti-slip mechanism lever lock structure, and contributes to increasing strength. In this embodiment, the first locking receiving portion 2g is configured as the edge of the extending portion 2i extending 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, the shutter curtain 3 moves to open and close under normal conditions 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 normal closed state, the shutter curtain 3 is spaced apart from the first and second mounting pockets 2e and 2f in the indoor / outdoor direction, 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 and 5i formed on the slat 5 are both configured to be positioned on the inner side of the groove (outer side in the left and right direction) than the first and second locking receiving portions 2g and 2h.

[0020] When the shutter curtain 3 in the closed state is deflected indoors by receiving a positive wind with a wind direction toward the indoors, the shutter curtain 3 assumes an inclined posture in which the inside (center) in the left-right direction is displaced indoors and the outside edge 5k in the left-right direction is displaced outdoor, resulting in deflection deformation on the side where the upper and lower interlock coupling parts 5a, 5b approach the first locking receiving part 2g, and this deflection deformation is deformation in which the outside edge 5k in the left-right direction of the slat 5 moves inward in the left-right direction. When this deflection deformation becomes large, the first locking receiving part 2g enters the first recessed part 5f, and finally the first locking part 5h locks (abuts) against the first locking receiving part 2g toward the outside in the left-right direction, restricting further deflection deformation, thereby preventing the shutter curtain 3 from coming off the guide rail 2.

[0021] On the other hand, when the shutter curtain 3 is deflected toward the outdoors due to the negative wind blowing in the opposite direction, the inside (center) of the shutter curtain 3 is displaced toward the outdoors, and the outside edge 5k is displaced toward the indoors, resulting in a deflection deformation on the side where the slat body 5b approaches the second locking portion 2h, and this deflection deformation is a deformation in which the outside edge 5k of the slat 5 moves toward the inside in the left-right direction while in the inclined position. When this deflection deformation becomes large, the second locking portion 2h enters the second recessed portion 5g, and finally the second locking portion 5i is locked (contacted) with the second locking portion 2h from the outside in the left-right direction, restricting further deflection deformation, 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 slipping out. 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 second locking portion 5i is configured to have greater strength than when the second locking receiving portion 2h is locked and supported by the conventional second locking portion 5i alone to prevent it from slipping out. 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 expand outward in the front-to-rear direction as they move inward in the left-right direction. This 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 a strong wind and returns to its original position, thereby preventing the smooth return to the original position from being compromised.

[0023] In the present embodiment configured as described above, when the shutter curtain 3 with forward winding specification is in the fully closed state, if the shutter curtain 3 is bent toward the indoor side due to positive pressure caused by a strong wind blowing toward the indoor side, the first locking portion 5h provided on the indoor side of the slat 5 will engage with the first locking receiving portion 2g on the indoor side of the guide rail 2, as shown in Figures 7 and 8, thereby preventing the shutter curtain 3 from slipping off from the guide rail 2. Conversely, if the shutter curtain 3 is bent toward the outdoor side due to negative pressure caused by a strong wind blowing toward the outdoor side, the second locking portion 5i provided on the indoor side of the slat 5 will engage with the second locking receiving portion 2h on the outdoor side of the guide rail 2, thereby preventing the shutter curtain 3 from slipping off from the guide rail 2.

[0024] In this case, the second engagement portion 5i formed on the slat body 5c is reinforced by the reinforcing member 7 provided on the slat 5, thereby increasing its strength. Specifically, the second engagement portion 5i is formed on the left-right outer edge portion of the second recessed portion 5f provided in the slat body portion 5c arranged between the upper and lower interlocking connection portions 5a, 5b of the slat 5, while the reinforcing member 7 is attached in a state in which it fits internally into one of the front-to-rear side surfaces of the slat body portion 5c, and therefore can be attached in a compact state that does not protrude from the slat 5. Furthermore, the reinforcing member 7 has an outer left-right edge 7b that extends outward further than the outer left-right edge 5k of the slat 5, and functions as a cushioning material that abuts against the groove bottom 2b of the guide rail 2 when the shutter curtain 3 moves biased left-right.As a result, the reinforcing member 7 can also be used as a cushioning material, thereby reducing the number of parts.

[0025] Moreover, in this structure, the second recessed portion 5g is formed by bending the slat body 5c toward the indoor side in a recessed shape, and cutting out the portion on the second engagement portion 5i side (the outer side in the left-right direction) to form a gap S. Therefore, the second engagement portion 5i becomes the cutout edge, and the engagement with the second engagement receiving portion 2h is more secure than when it is not a cutout edge. Incidentally, the second recessed portion 5g formed in the slat body 5c may of course be formed by cutting out the entire bottom plate portion 5j without leaving any part, or conversely, may be formed by simply bending the second recessed portion 5g without forming any gap S.

[0026] In this case, since the inner left-right edge 7c of the reinforcing member 7 is located at the position of the second engagement portion 5i, when the second engagement receiving portion 2h engages with the second engagement portion 5i, the second engagement portion 5i becomes the first layer on the front side and the inner left-right edge 7c of the reinforcing member 7 becomes the second layer on the inside, engaging in a solid state which reinforces the second engagement portion 5i area and reliably increases the strength, thereby improving the shutter curtain 3's ability to prevent it from slipping off the guide rail 2 and improving wind pressure resistance.

[0027] Next, the case of the shutter device 1 of reverse winding specification will be described. As shown in Figures 9 and 10, when positive pressure is applied, the second engagement portion 5i formed on the second fitting portion 5g arranged on the indoor side engages with the first engagement receiving portion 2g of the guide rail 2 to prevent it from coming loose, and when negative pressure is applied, the first engagement portion 5h formed on the first fitting portion 5f arranged on the outdoor side engages with the second engagement receiving portion 2h of the guide rail 2 to prevent it from coming loose, so that the engagement relationship of the shutter curtain 3 is reversed from that of the shutter device 1 with the forward winding specification described above.

[0028] In other words, when the reverse-winding shutter curtain 3 is subjected to positive pressure, the second locking portion 5i provided on the indoor side of the slat 5 engages with the first locking receiving portion 2g provided 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 toward the outdoors due to negative pressure caused by a strong wind blowing toward the outdoors, the first locking portion 5h provided on the outdoor side of the slat 5 engages with the second locking receiving portion 2h provided on the outdoor side of the guide rail 2, preventing the shutter curtain 3 from slipping off from the guide rail 2. In this case, the second locking portion 5i formed on the slat body 5c will lock into the locking receiving portion 2g or 2h on the guide rail 2 side when subjected to positive pressure, thereby providing an anti-slip function. As in the case of the forward winding specification, the reinforcing action of the reinforcing member 7 provided on the slat body 5c is also provided, thereby ensuring increased strength.

[0029] Of course, the present invention is not limited to the above-described embodiment. As shown in FIG. 6, the reinforcing member 7 in the above-described embodiment is set so that the left-right inner edge portion 7c is positioned at the same position as the second engagement portion 5i of the slat 5. However, the present invention is not limited to this. As long as it reinforces the second engagement portion 5i, it does not necessarily have to be positioned at the same position as the second engagement portion 5i, and it may be slightly recessed. Conversely, as in the second embodiment shown in FIG. 11(A), it may have an extension portion 7d that extends beyond the second engagement portion 5i toward the gap S, and the second engagement portion 5i can be reinforced in this way as well. Furthermore, in the third embodiment shown in Fig. 1B, in which the extension 7d is formed, the inner edge 7e in the left-right direction of the extension 7d is inclined outward in the left-right direction toward the gap S side, that is, in the case of the illustrated example being a forward-winding type, the edge 7e is inclined outward in the left-right direction toward the indoor side in the indoor / outdoor direction (one side in the front-rear direction), so that the locking position when it is locked to the first locking receiving part 2g due to a strong wind is guided to be deeper, that is, the locking position is guided to be displaced toward the inner fitting side of the second fitting part 5g (the first fitting part 5f side), and this makes the locking on the locking receiving part side more reliable, thereby further improving the strength of the locking mechanism. Of course, it goes without saying that in the case of a reverse-winding type, this configuration is the opposite to that in the case of a forward-winding type in the indoor / outdoor direction. [Industrial Applicability]

[0030] 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]

[0031] 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 connection

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. In the shutter device for a building, the shutter curtain is configured by interlocking adjacent slats vertically, A recessed portion is formed at the outer edge of the slat in the left-right direction, and the outer edge of the recessed portion is used as a locking portion. When the shutter curtain is deflected in the forward and backward directions by a strong wind, the shutter curtain is prevented from coming off the guide rail by the locking portion locking with the locking receiving portion provided on the guide rail. The slat is provided with a reinforcing member for reinforcing the engagement portion, The slat is configured to include upper and lower interlocking joints biased toward one side in the front-rear direction, and a slat body portion disposed between the upper and lower interlocking joints and biased toward the other side in the front-rear direction, The recessed portion is formed in the slat body, A shutter device for buildings, characterized in that the reinforcing member is located closer to the outer edge in the left-right direction than the recessed portion and is attached in a state where it is fitted into one of the front-to-rear side surfaces of the slat body.

2. A shutter curtain that opens and closes to separate an opening into front and rear sections, guide rails that guide the left and right edges of the shutter curtain up and down, and a winding body that is provided above the opening and winds up the shutter curtain, In the shutter device for a building, the shutter curtain is configured by interlocking adjacent slats vertically, A recessed portion is formed at the outer edge of the slat in the left-right direction, and the outer edge of the recessed portion is used as a locking portion. When the shutter curtain is deflected in the forward and backward directions by a strong wind, the shutter curtain is prevented from coming off the guide rail by the locking portion locking with the locking receiving portion provided on the guide rail. A reinforcing member for reinforcing the locking portion is attached to the outer edge of the slat in the left-right direction from the recessed portion, This shutter device for buildings is characterized in that the reinforcing member is thicker than the plate thickness of the slats, is made of synthetic resin material, and has an outer edge portion in the left-right direction that extends outward beyond the outer edge portion of the slats, thereby acting as a cushioning material that abuts against the bottom of the rail groove of the guide rail when the shutter curtain moves biasedly in the left-right direction.

3. A shutter device for a building as described in claim 1 or 2, characterized in that the concave fitting portion is formed by bending the body of the slat into a concave fitting shape toward one side in the front-to-rear direction, cutting out a notch to create a gap, or cutting out a portion of the slat bent into a concave fitting shape on the side of the engaging portion to create a gap.

4. A shutter device for a building as described in any one of claims 1 to 3, characterized in that the locking portion is formed at the cutout edge portion by forming a gap in the recessed portion, and the reinforcing member is configured so that the inner edge portion in the left-right direction is located at the locking portion position or extends beyond the locking portion toward the gap side.

5. A shutter device for a building as described in claim 4, characterized in that when the reinforcing member is provided with an extension portion extending toward the gap side, the left-right inner edge portion of the extension portion is inclined toward the left-right outer side toward one side in the front-to-rear direction.

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