JP2023030814A - Shutter device for building - Google Patents

Abstract

To ensure strength at both ends of a slat in the longitudinal direction while achieving cost reduction.SOLUTION: A slat 50 of a shutter device 10 for a building is formed at a stoper portion 51a thereof with an escape hole 57 for forming a recessed portion 56, and the escape hole 57 is formed in an elongated slot shape extending in the vertical direction. Therefore, at both side portions in the horizontal direction of the slat 50, the mechanical strength of a portion around which the escape hole 57 is formed decreases. Here, the vertical dimension of the escape hole 57 is set to be smaller than the vertical dimension of a slat main body portion 51. This makes it possible to form a pair of upper and lower connecting portions 58 connecting the recessed portion 56 and the stopper portion 51A on the outer side in the vertical direction of the escape hole 57 of the slat main body portion 51. For this reason, the strength of the outer portion in the horizontal direction of the slat main body portion 51 can be increased compared to a virtual case where the vertical dimension of the escape hole 57 is set to coincide with the vertical dimension of the slat main body portion 51.SELECTED DRAWING: Figure 3

Description

The present invention relates to an architectural shutter device.

In the shutter curtain of the architectural shutter device described in Patent Document 1 below, a plurality of slats extending in the horizontal direction are connected in the vertical direction. The main body of the slat is curved in an arcuate shape protruding to the outside when viewed from the left and right direction, and flat plate portions recessed to the indoor side are formed on both sides in the left and right direction of the main body. Both left and right ends of the main body portion (outer portions in the left and right direction than the flat plate portion) are configured as locking hooks, and the locking hooks are configured to be capable of locking with the locking portions of the guide rail. . As a result, when the shutter curtain bends toward the indoor side or the outdoor side due to wind pressure or the like, the locking hooks that are displaced inward in the left-right direction come into contact with the locking portions of the guide rails, and the locking hooks move inward in the left-right direction. Displacement is blocked. Therefore, it is possible to prevent the slat from coming off the guide rail while reducing the cost of the slat.

Patent No. 4864599

However, the architectural shutter device described above has room for improvement in the following points. In other words, in the slat of the architectural shutter device, the vertically extending cut portion is formed between the flat plate portion and the locking hook, so that the flat plate portion is recessed toward the indoor side with respect to the locking hook. I am letting The cut portion is formed in a relatively narrow slit-like shape and is formed over the entire vertical direction of the main body portion. For this reason, when wind pressure higher than in the past acts on the shutter curtain, when the locking hook is locked to the locking portion of the guide rail, stress concentration occurs at both ends of the notch in the vertical direction, and the left and right of the slats are concentrated. There is a risk that the directional side portions may break on both sides of the notch in the vertical direction. Therefore, it is desirable that the architectural shutter device has a structure capable of securing the strength at both ends in the longitudinal direction of the slat while achieving cost reduction.

SUMMARY OF THE INVENTION In consideration of the above facts, it is an object of the present invention to provide a construction shutter device capable of securing strength at both ends of a slat in the longitudinal direction while achieving cost reduction.

One or more embodiments of the present invention comprise a pair of guide rails extending in the vertical direction on both sides in the left-right direction of the doorway of a building and having rail grooves opened inward in the left-right direction, and a pair of guide rails extending in the left-right direction. and a shutter curtain including a plurality of slats having both ends in the longitudinal direction inserted into the rail grooves, the slats constituting vertical intermediate portions of the slats, and being viewed from the left-right direction. a slat main body having slat-side engaging portions at both ends in the left-right direction, which are curved in an arc shape convex to one side in indoor and outdoor directions and configured to be engageable with the guide rail; a concave portion disposed on the inner side in the left-right direction with respect to the slat-side engaging portion and recessed toward the other side in the indoor/outdoor direction; and an escape hole extending in a vertical direction, wherein the vertical dimension of the slat main body is larger than the vertical dimension of the escape hole.

In one or more embodiments of the present invention, a connecting portion is formed in a portion of the slat main body portion on the outer side in the vertical direction of the relief hole, and the connecting portion is positioned on the outer side in the horizontal direction when viewed from the vertical direction. This architectural shutter device is curved in a curved line toward one side in the indoor and outdoor directions.

In one or more embodiments of the present invention, the escape hole is formed in a long hole shape extending in the vertical direction with the lateral direction being the width direction. This architectural shutter device is formed in a semicircular shape that is open inward in the vertical direction.

In one or more embodiments of the present invention, an inner peripheral surface on the left-right direction outer side of the relief hole is configured as a stopper surface, and a dimension in the indoor/outdoor direction between the recess and the upper end of the stopper surface is the indoor-outdoor dimension between the recess and the lower end of the stopper surface.

One or more embodiments of the present invention is an architectural shutter device in which the guide rail is made of extruded shaped steel formed by extruding a steel material.

According to one or more embodiments of the present invention, strength can be ensured at both longitudinal ends of the slats while achieving cost savings.

It is the back view seen from the rear side which shows the shutter device for construction concerning this embodiment. FIG. 2 is a cross-sectional view (a cross-sectional view taken along line 2-2 in FIG. 1) seen from above showing a fitting state between slats and guide rails of the shutter curtain shown in FIG. 1; FIG. 2 is a front view showing an enlarged left end portion of a slat in the shutter curtain shown in FIG. 1; FIG. 4 is a side view seen from the right side for explaining the connected state of the slats shown in FIG. 3; (A) is a cross-sectional view corresponding to FIG. 2 showing a fitting state between a slat and a guide rail when an external force is applied to the rear side of the shutter curtain shown in FIG. 1; 3 is a cross-sectional view corresponding to FIG. 2 showing a fitted state between the slat and the guide rail when an external force acts on the shutter curtain shown in FIG. 1 toward the front side;

A construction shutter device 10 according to the present embodiment will be described below with reference to the drawings. The architectural shutter device 10 is installed in an opening such as a doorway of a structure such as a building, and is configured as an opening/closing device for opening and closing the doorway. An arrow UP, an arrow RH, and an arrow FR appropriately shown in the drawings indicate the upper side, the right side, and the front side of the architectural shutter device 10 . In addition, the longitudinal direction of the architectural shutter device 10 coincides with the indoor/outdoor direction of the building, with the front side corresponding to the outdoor side and the rear side corresponding to the indoor side.

(Overall Configuration of Architectural Shutter Device 10)
As shown in FIG. 1, the architectural shutter device 10 includes a case 12 forming the upper end of the architectural shutter device 10, guide rails 20 provided on both lateral sides of the doorway, and shutters for opening and closing the doorway. A curtain 40 is included. The shutter curtain 40 is composed of a plurality of slats 50. As shown in FIG. The slats 50 are formed in a substantially elongated plate shape extending in the left-right direction. In the shutter curtain 40, the plurality of slats 50 are connected in the up-down direction. Both longitudinal (lateral) ends of the slat 50 are inserted into the rail grooves 25 of the guide rail 20 so as to be vertically movable (see FIG. 2).

An opening/closing mechanism 14 for opening and closing the shutter curtain 40 is provided inside the case 12 . The opening/closing mechanism 14 has a substantially cylindrical drum 16 whose axial direction is the horizontal direction, and the drum 16 is rotatably supported by the case 12 . The opening/closing mechanism 14 also has a driving section 18 for driving the drum 16 . An upper end portion of the shutter curtain 40 is connected to the drum 16 , and the shutter curtain 40 is wound around the drum 16 by rotating the drum 16 . Accordingly, by rotating the drum 16 forward or backward by the drive unit 18, the shutter curtain 40 moves up and down along the guide rail 20, thereby opening and closing the doorway of the building. The configurations of the guide rails 20 and the slats 50 of the shutter curtain 40 will be described below.

(Regarding guide rail 20)
As shown in FIG. 2, the guide rail 20 is composed of a single member and is composed of a hot-extruded section steel formed by hot-extrusion of steel material. The guide rail 20 extends in the vertical direction and is formed in a substantially U-shape that opens inward in the left-right direction when viewed from above. Specifically, the guide rail 20 includes a bottom wall 21 that constitutes the outer end in the left-right direction of the guide rail 20 and has a plate thickness direction in the left-right direction, and a rear end of the bottom wall 21 that extends inward in the left-right direction. and an outer wall 23 extending inward in the left-right direction from the front end of the bottom wall 21 .

A retainer base portion 24 is formed at the laterally inner end portion of the outer wall 23 , and the retainer base portion 24 forms the laterally inner portion of the outer wall 23 in a substantially crank shape when viewed from above. It is Specifically, the retainer base portion 24 includes a first retainer wall 24A extending rearward from an intermediate portion in the left-right direction of the outer wall 23, and a first retainer wall 24A extending inward in the left-right direction from the tip portion of the first retainer wall 24A. and the extended second retaining wall 24B.

A first decorative plate 30 is provided on the guide rail 20 . The first decorative plate 30 is fixed to the guide rail 20 by being bent into a predetermined shape so as to cover at least the retainer base portion 24 from both sides in the left-right direction and from the rear side. Furthermore, the guide rail 20 is provided with a second decorative plate 32 . The second decorative plate 32 is bent into a predetermined shape so as to cover at least the front surface and the left-right inner end surface of the inner wall 22 and is fixed to the guide rail 20 .

The inside of the guide rail 20 including the first decorative plate 30 and the second decorative plate 32 is configured as a rail groove 25, and the rail groove 25 is opened inward in the horizontal direction and extends in the vertical direction. It is Further, in the guide rail 20 , the first decorative plate 30 and the retaining base portion 24 constitute a retainer portion 26 for preventing the later-described slat 50 from detaching from the guide rail 20 . The front-to-rear dimension L1 of the rail groove 25 at the retaining portion 26 is set smaller than the front-to-rear dimension of the rest of the rail groove 25 .

(About slat 50)
As shown in FIGS. 2 and 3, the slat 50 is formed in the shape of a substantially elongated plate extending in the left-right direction, and is bent into a substantially U-shape that opens rearward when viewed in the left-right direction. there is Specifically, the slat 50 includes a slat main body portion 51 forming a top wall (front wall) of the slat 50, an upper connecting piece 52 extending rearward from the upper end portion of the slat main body portion 51, and a slat main body. and a lower connecting piece 53 extending rearward from the lower end of the portion 51 .

The slat main body 51 extends in the left-right direction with the front-rear direction as the plate thickness direction, and is curved in a substantially arc shape that protrudes forward (one side in the indoor/outdoor direction) when viewed from the left-right direction. As described above, the upper connecting piece 52 extends rearward from the upper end of the slat main body 51 and is slightly slanted upward toward the rear as viewed in the left-right direction. An upper interlock engaging portion 54 projecting upward is formed at the tip (rear end) of the upper connecting piece 52 . The upper interlock engaging portion 54 is bent forward and downward at its upper end to form a generally inverted U-shape that opens downward when viewed from the left-right direction. An upper interlock engaging portion 54 constitutes the upper rear end of the slat 50 .

As described above, the lower connecting piece 53 extends rearward from the lower end portion of the slat body portion 51 and is bent forward at the intermediate portion in the extending direction. In other words, the lower connecting piece 53 is formed in a substantially V-shaped plate shape that opens forward when viewed from the left-right direction, and the upper end of the lower connecting piece 53 is connected to the lower end of the slat main body 51 . ing. A portion of the lower connecting piece 53 that is bent forward in the extending direction is formed as a bent portion 53A, and an inner space of the lower connecting piece 53 is formed as a lower connecting groove portion 53B that opens forward. It is A lower interlock engaging portion 55 projecting downward is formed at the tip (lower end) of the lower connecting piece 53 . The lower interlock engaging portion 55 is bent rearward and upward at its lower end to form a substantially U-shape opened upward when viewed from the left-right direction. The lower interlock engaging portion 55 is arranged forward of the bent portion 53A, and the bent portion 53A constitutes the lower rear end of the slat 50. As shown in FIG.

As shown in FIG. 4 , in the shutter curtain 40 , in the slats 50 arranged in the vertical direction, the lower interlock engaging portion 55 of the upper slat 50 is connected to the upper interlock engaging portion of the lower slat 50 . 54 to interlock the slats 50 together. Here, in the slat 50 , the lower interlock engaging portion 55 protrudes downward from the lower end portion of the lower connecting piece 53 . Therefore, in the shutter curtain 40 , the lower interlock engaging portion 55 of the upper slat 50 and the upper interlock engaging portion 54 of the lower slat 50 are located below the lower connecting piece 53 of the upper slat 50 . is engaged with. As a result, when the slats 50 are connected to each other, the slats 50 arranged adjacent to each other in the vertical direction are engaged with the lower interlock engaging portion 55 and the upper interlock engaging portion 55 outside the lower connecting groove portion 53B of the upper slat 50. 54 are engaged. In addition, in the engaged state between the upper interlock engaging portion 54 and the lower interlock engaging portion 55, the upper interlock engaging portion is arranged behind the lower interlock engaging portion 55, and the upper interlock engaging portion 54 and the lower interlock engaging portion 55 are arranged behind. The lock engaging portion 54 is invisible from the front side. When the shutter curtain 40 is wound by the drum 16 , the front side of the slat 50 is wound radially outward of the drum 16 .

As shown in FIGS. 2 and 3 , recesses 56 recessed rearward (the other side in the indoor/outdoor direction) are formed in the left-right direction (longitudinal direction) outer portions of the slat main body 51 . is formed in a substantially flat plate shape along a plane orthogonal to the front-rear direction (FIG. 2 shows the recess 56 on the right side of the slat main body 51, and FIG. 3 shows the left side of the slat main body 51. part recess 56 is shown). The recess 56 is arranged inside in the left-right direction with respect to the outer end in the left-right direction of the slat 50 . A left-right outer end portion of the slat main body portion 51 (a portion of the slat main body portion 51 that is laterally outer than the concave portion 56 in the left-right direction) is configured as a stopper portion 51A as a slat-side engaging portion. As a result, the thickness T1 (the dimension in the front-rear direction) of the stopper portion 51A of the slat 50 is set to be thicker than the thickness T2 of the recess 56. As shown in FIG. Specifically, the thickness dimension T2 of the recessed portion 56 of the slat 50 is smaller than the front-rear dimension L1 of the opening of the rail groove 25 of the guide rail 20 (the portion where the retaining portion 26 is formed), A thickness dimension T1 of the stopper portion 51A of the slat 50 is set larger than a longitudinal dimension L1 of the opening of the rail groove 25 of the guide rail 20. As shown in FIG.

An escape hole 57 for forming the recess 56 is formed through the slat main body 51 between the recess 56 and the stopper portion 51A. It is formed in the shape of an elongated hole extending in the longitudinal direction. The laterally outer inner peripheral surface of the relief hole 57 is configured as a stopper surface 51B, and the stopper surface 51B constitutes the laterally inner end surface of the stopper portion 51A. On the other hand, the inner peripheral surface of the escape hole 57 on the inner side in the left-right direction constitutes the outer end surface in the left-right direction of the concave portion 56 . Accordingly, in the slat 50, the stopper portion 51A bulges forward with respect to the concave portion 56 while the stopper surface 51B is exposed inward in the left-right direction. The vertical dimension B1 of the escape hole 57 is set smaller than the vertical dimension B2 of the slat main body 51, and both ends of the escape hole 57 in the vertical direction are formed in a semicircular shape that is opened inward in the vertical direction when viewed from the front side. formed. As a result, a pair of upper and lower connection portions 58 that connect the concave portion 56 and the stopper portion 51A are formed on the slat main body portion 51 outside the escape hole 57 in the vertical direction. The connecting portion 58 is curved in a curved shape toward the front side from the concave portion 56 toward the outer side in the left-right direction when viewed in the vertical direction. Specifically, the connection portion 58 is curved in a substantially quarter-circle shape that is opened obliquely forward and inward in the left-right direction when viewed from above and below. Also, the vertical dimension B1 of the escape hole 57 is set so that the front-rear dimension C1 from the front surface of the recess 56 to the upper end of the stopper surface 51B and the front-rear dimension C2 from the front surface of the recess 56 to the lower end of the stopper surface 51B are the same. It is

Both longitudinal ends of the slats 50 are inserted into the rail grooves 25 of the guide rails 20 so as to be vertically movable (see FIG. 2). Specifically, the recessed portion 56 of the slat 50 is arranged at the opening of the rail groove 25, and the stopper portion 51A is arranged laterally outside the retaining portion 26 of the guide rail 20. As shown in FIG. Although the details will be described later, when the internal pressure on the indoor side becomes higher than the external pressure on the outdoor side, and the slats 50 are deformed so that the central portion of the shutter curtain 40 in the left-right direction bends forward, the stopper portion 51A may be deformed. The vertical dimension of the relief hole 57 and the stopper portion 51A of the recessed portion 56 are adjusted so that a predetermined engagement margin A (see FIG. 5B) is secured between the stopper surface 51B and the retaining portion 26 of the guide rail 20 in the front-rear direction. The amount of dent etc. for is set.

In addition, a portion of the lower connecting piece 53 of the slat 50 connected to the concave portion 56 is formed with an excess thickness portion 59 (see FIG. 3) that bulges downward. The excess thickness portion 59 is excess thickness that is generated when the recessed portion 56 is formed by press working. It is configured to be arranged in the lower connecting groove portion 53B.

(Effect)
Next, the operation and effects of this embodiment will be described.

In the architectural shutter device 10 configured as described above, both lateral ends of the slats 50 constituting the shutter curtain 40 are inserted into the rail grooves 25 of the guide rail 20 so as to be vertically movable. Specifically, the concave portion 56 of the slat 50 is arranged on the rear side of the retaining portion 26 of the guide rail 20, and the stopper portion 51A of the slat 50 is disposed laterally outside the retaining portion 26. there is

Then, when an external force to the rear side due to wind pressure or the like acts on the shutter curtain 40 , both left and right ends of the slats 50 hit the second decorative plate 32 of the guide rail 20 . When the external force is relatively large, the lateral ends of the slats 50 are supported by the guide rails 20, so that the slats 50 are flexurally deformed so that the central portion of the slats 50 in the lateral direction protrudes rearward. do. At this time, as shown in FIG. 5A, the rear end of the slat 50 abuts the opening end of the rail groove 25 in the guide rail 20 at the laterally outer portion of the slat 50, and the slat 50 is guided. Starting from the abutting portion with the rail 20, it inclines forward as it goes outward in the left-right direction. Also, at this time, the stopper portion 51A of the slat 50 is displaced inward in the left-right direction, and the stopper surface 51B of the stopper portion 51A engages with the retaining portion 26 of the guide rail 20. As shown in FIG. As a result, the left and right ends of the slat 50 are prevented from being displaced inward in the left and right direction. Therefore, even if an external force to the rear side acts on the shutter curtain 40, it is possible to prevent the slats 50 from slipping out of the rail grooves 25. FIG.

On the other hand, when an external force to the front side due to wind pressure or the like acts on the shutter curtain 40 , the concave portion 56 of the slat 50 hits the retaining portion 26 of the guide rail 20 . When the external force is relatively large, the lateral ends of the slats 50 are supported by the guide rails 20, so the slats 50 are flexurally deformed so that the central portion of the slats 50 in the lateral direction protrudes forward. . At this time, as shown in FIG. 5(B), the concave portion 56 of the slat 50 abuts the opening end of the rail groove 25 in the guide rail 20 at the longitudinally outer portion of the slat 50, and the slat 50 is in contact with the guide rail. Starting from the abutting portion with 20, it inclines rearward as it goes outward in the left-right direction. Also, at this time, the stopper portion 51A of the slat 50 is displaced inward in the left-right direction, and the stopper surface 51B of the stopper portion 51A engages with the retainer portion 26 of the guide rail 20 . As a result, the left and right ends of the slat 50 are prevented from being displaced inward in the left and right direction. Therefore, even if an external force to the front side acts on the shutter curtain 40, it is possible to prevent the slats 50 from slipping out of the rail grooves 25. FIG.

By the way, when the stopper portion 51A (stopper surface 51B) of the slat 50 engages with the retainer portion 26 of the guide rail 20, a reaction force is applied from the guide rail 20 to the stopper portion 51A in the left-right direction. That is, in the slat 50, the tensile force to the left-right direction outer side acts on both left-right direction end portions (stopper portions 51A) of the slat 50. As shown in FIG. On the other hand, the slat body portion 51 of the slat 50 is provided with an escape hole 57 for forming the recess portion 56 between the stopper portion 51A and the recess portion 56, and the escape hole 57 extends in the vertical direction. It is formed in the shape of an elongated hole. For this reason, the mechanical strength of the portions in which the escape holes 57 are formed is reduced on both sides of the slat 50 in the left-right direction. As a result, the tensile force acting on the slats 50 may cause the left and right side portions of the slats 50 to break at the portions where the relief holes 57 are formed.

Here, the vertical dimension B1 of the escape hole 57 is set smaller than the vertical dimension B2 of the slat body portion 51 . As a result, a pair of upper and lower connection portions 58 that connect the concave portion 56 and the stopper portion 51A can be formed outside the escape hole 57 of the slat body portion 51 in the vertical direction. Therefore, compared to the case where the vertical dimension B1 of the relief hole 57 is set to coincide with the vertical dimension B2 of the slat body 51, the strength of the laterally outer portion of the slat body 51 can be increased. . As a result, when the stopper portion 51A of the slat 50 is engaged with the retainer portion 26 of the guide rail 20, breakage of the laterally outer portion of the slat 50 can be suppressed.

Moreover, the connecting portion 58 is formed integrally with the slat 50 . For this reason, in order to ensure the mechanical strength of the slat 50 on both sides in the left-right direction, for example, without separately providing a connecting member that connects the concave portion 56 of the slat body portion 51 and the stopper portion 51A, the left-right direction of the slat 50 is reduced. It is possible to increase the mechanical strength in both side portions. That is, while the slat 50 having the recessed portion 56 is composed of a single member, it is possible to ensure the mechanical strength of the left and right side portions of the slat 50 . As described above, the strength of the slat 50 can be ensured at both ends in the longitudinal direction while the cost of the slat 50 is reduced.

In addition, the connecting portion 58 curves forward in a curved shape toward the outer side in the left-right direction when viewed from the top and bottom directions. Specifically, the connecting portion 58 is formed in a substantially quarter-arc shape that opens obliquely forward and inward in the left-right direction when viewed from above. As a result, the change in shape of the connecting portion 58 can be reduced as compared with the case where the connecting portion 58 is formed in a stepped shape with a right angle when viewed from above and below. As a result, it is possible to suppress the concentration of stress at the connecting portion 58 when the laterally outer tensile force acts on the laterally opposite end portions of the slats 50 . Therefore, when the stopper portion 51A of the slat 50 and the retainer portion 26 of the guide rail 20 are engaged with each other, breakage of the laterally outer portion of the slat 50 can be effectively suppressed.

Further, the escape hole 57 is formed in a long hole shape whose width direction is the horizontal direction and whose longitudinal direction is the vertical direction. is formed in Therefore, the stress generated at both ends of the escape hole 57 in the longitudinal direction can be reduced as compared with the case where the escape hole 57 is formed in a rectangular long hole shape when viewed from the front side. As a result, it is possible to suppress the concentration of stress at the connecting portion 58 when the laterally outer tensile force acts on the laterally opposite end portions of the slats 50 . Therefore, when the stopper portion 51A of the slat 50 and the retainer portion 26 of the guide rail 20 are engaged with each other, breakage of the laterally outer portion of the slat 50 can be more effectively suppressed.

In addition, the left-right outer side surface of the escape hole 57 is configured as a stopper surface 51B. and the front-rear dimension C2 match. As a result, the retaining portion 26 and the stopper surface 51B can be uniformly engaged in the vertical direction. As a result, the reaction force acting on the stopper surface 51B from the retaining portion 26 can be made uniform. Therefore, breakage of the laterally outer portion of the slat 50 can be more effectively suppressed.

The guide rail 20 is made of hot-extruded section steel formed by hot-extrusion of steel. As a result, when the slat 50 and the guide rail 20 are engaged with each other, the guide rail 20 for preventing the slat 50 from moving inward in the left-right direction contributes to cost reduction of the guide rail 20 while being composed of a single member. can do. Therefore, the cost of the entire architectural shutter device 10 can be reduced.

10 Architectural Shutter Device 20 Guide Rail 25 Rail Groove 40 Shutter Curtain 50 Slat 51A Stopper Part (Slat Side Engagement Part)
51B Stopper surface 56 Recessed portion 57 Escape hole 58 Connection portion

Claims (5)

a pair of guide rails extending in the vertical direction on both sides in the horizontal direction of an entrance of a building and having rail grooves opened inward in the horizontal direction;
a shutter curtain including a plurality of slats extending in the left-right direction and having both ends in the longitudinal direction inserted into the rail grooves;
with
The slats are
A slat-side engaging portion that constitutes an intermediate portion in the vertical direction of the slat, is curved in an arc shape that protrudes toward one side in the indoor and outdoor directions when viewed in the horizontal direction, and is configured to be engageable with the guide rail in the horizontal direction. slat body portions provided at both ends;
a concave portion formed in the slat main body portion, arranged on the inner side in the left-right direction with respect to the slat-side engaging portion, and recessed toward the other side in the indoor/outdoor direction;
an escape hole penetrating between the slat-side engaging portion and the recess in the slat main body portion and extending in the vertical direction;
and
The architectural shutter device, wherein the vertical dimension of the slat main body is larger than the vertical dimension of the escape hole. A connecting portion is formed at a portion of the slat main body portion on the outer side of the escape hole in the vertical direction,
2. The architectural shutter device according to claim 1, wherein the connecting portion is curved toward one side in the indoor/outdoor direction as it extends outward in the left-right direction when viewed in the vertical direction. The relief hole is formed in a long hole shape extending in the vertical direction with the lateral direction as the width direction,
3. The architectural shutter device according to claim 1, wherein both ends of the relief hole in the vertical direction are formed in a semicircular shape that is open inward in the vertical direction. an inner peripheral surface on the left-right direction outer side of the escape hole is configured as a stopper surface,
4. The architectural shutter according to claim 3, wherein the indoor-outdoor dimension between the recess and the upper end of the stopper surface matches the indoor-outdoor dimension between the recess and the lower end of the stopper surface. Device. The architectural shutter device according to any one of claims 1 to 4, wherein the guide rail is made of an extruded shaped steel formed by extruding a steel material.

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