JP7835576B2 - shutter - Google Patents

Description

This invention relates to a shutter.

A shutter device has been proposed that includes a shutter curtain consisting of multiple structural members extending in the opening width direction and sheets provided on the structural members. A suspension wire is fixed to the lower end of the shutter curtain, and when the shutter curtain is opened, the suspension wire is wound up, causing the structural members to overlap and the sheets to fold, thereby raising and opening the shutter curtain (Patent Documents 1 and 2).

When opening and closing an opening, the widthwise ends of the shutter curtain need to be guided by guide rails on the left and right. However, in this type of shutter device, the widthwise ends of the shutter curtain are composed of the ends of the structural members and the ends of the sheet, so a guide rail and guide mechanism with a different configuration from the U-shaped guide rails commonly used in shutter devices is required. In particular, since the lifting of the shutter curtain begins from the bottom member at the lower end of the shutter curtain (where the suspension wire is fixed), it is important that the bottom member is guided stably in the height direction.
Japanese Patent Publication No. 2-74780 Japanese Patent Publication No. 9-189177

The present invention aims to provide a suitable guide mechanism for the bottom member at the lower end of a shutter curtain, which includes a plurality of structural members and a sheet provided on the plurality of structural members.

The technical means employed in this invention are:
A shutter curtain comprising a plurality of structural members including a bottom member, and sheets provided on the plurality of structural members,
The shutter curtain is equipped with guide rails that guide both ends in the width direction in the height direction,
The guide rail has a first portion that is located approximately in the center of the depth width of the shutter curtain and extends in the facing direction,
The bottom member is provided with an upper guided portion and a lower guided portion at both ends in the width direction.
The upper guided portion and the lower guided portion consist of a pair of guide elements that are spaced apart and facing each other in the depth direction, and the first portion of the guide rail is positioned between the pair of guide elements.
It's a shutter.

In one embodiment, at least one of the upper and lower guide elements is a pair of first guide rollers.
In one embodiment, at least the lower guide element is a pair of first guide rollers.

In one embodiment, at least one of the upper and lower guide elements is a pair of sliding members.
In one embodiment, the sliding member is made of resin.
In one embodiment, a guided groove extending in the visible direction is formed between the inner visible surfaces of the pair of sliding members, and each inner visible surface of the pair of sliding members faces the first portion of the guide rail with a clearance.
In one embodiment, a guide receiving portion is provided, which consists of the guided groove portion and a wide portion located on the inner side of the guided groove portion.
The guide rail comprises a second portion extending in the depth direction at the tip of the first portion,
The depth of the second portion is greater than the groove width of the guided groove and less than the depth of the wide portion, the second portion is located in the wide portion, and the second portion can be locked into the guided groove.
In one embodiment, the second portion extends in the depth direction so as to be spaced apart from the tip of the first portion and has a T-shape in plan view.
In one embodiment, the second portion is lockable into the inner surface of the sliding member.
In one embodiment, the guide receiving portion is formed on guide plates provided at both ends in the width direction of the bottom member.

In one embodiment, the guide rail comprises a second portion extending in the depth direction at the tip of the first portion,
At least one second guide roller capable of contacting the second portion is provided at both ends in the width direction of the bottom member.
In one embodiment, the second guide roller is provided at the lower end of the bottom member, in which case the lower guided portion comprises the pair of guide elements and the second guide roller.
By providing a second guide roller, the shutter curtain can be opened and closed smoothly even if it is misaligned in the visible direction.
In one embodiment, the second guide roller is provided at the midpoint of the height direction of the upper bottom, that is, the second guide roller is provided between the upper guided portion and the lower guided portion.

In one embodiment, the bottom member is located at the lowest point of the shutter curtain.
In one embodiment, the pair of guide elements in the upper guided portion are a pair of sliding members, and the pair of guide elements in the lower guided portion are a pair of first guide rollers.
In one embodiment, the gap between the pair of first guide rollers is smaller than the gap between the pair of sliding members.
In one embodiment, the second guide roller is provided at the lower end of the bottom member.
In the embodiments described later, the bottom member (lower bottom) comprises an upper guided portion equipped with a pair of sliding members and a lower guided portion equipped with a pair of first guide rollers and second guide rollers.

In one embodiment, the shutter curtain is
An upper portion consisting of multiple long aggregates and wide sheets provided on the multiple long aggregates,
It includes a lower portion consisting of a plurality of short aggregates and a narrow sheet provided on the plurality of short aggregates,
The bottom member includes the lowest upper bottom of the upper portion and the lowest lower bottom of the lower portion.

In one embodiment, the upper guided portion and the lower guided portion of the upper bottom are a pair of sliding members.
In one embodiment, the second guide roller is provided at an intermediate height portion of the upper bottom.
In the embodiment described later, the bottom member (upper bottom) comprises an upper guided portion equipped with a pair of sliding members, a lower guided portion equipped with a pair of sliding members, and a second guide roller located between the upper guided portion and the lower guided portion.

In this invention, the visible portion (first portion) of the guide rail is positioned between a pair of guide elements, an upper guide portion and a lower guide portion, provided at both ends in the width direction of the bottom member. This prevents the bottom member from tipping over, allowing the bottom member to maintain a vertical position and move up and down stably when the shutter curtain is opened and closed.
The pair of guide elements (a pair of first guide rollers and a pair of sliding members) in the upper and lower guided sections also have the function of restricting the deviation of the shutter curtain in the direction of its projection.

This is a front view of the sheet shutter according to the first embodiment (with the opening fully closed). This is a front view of the sheet shutter according to the first embodiment (with the opening fully open). This is the upper end portion of the sheet shutter plan view and front view according to the first embodiment. This is a longitudinal cross-sectional view of Figure 1. This is a side view of the shutter curtain according to the first embodiment (with the opening fully closed). This is a longitudinal cross-sectional view of Figure 2. This is a side view of the shutter curtain according to the first embodiment (with the opening fully open). This is a side view of the aggregate according to this embodiment. This embodiment shows guide plates provided at both ends in the width direction of the aggregate. This is a plan view of the widthwise end of the sheet shutter according to this embodiment. The upper figure is a longitudinal section view of Figure 10, and the lower figure is a front view of Figure 10. This is a magnified view of the end portion in the width direction of the sheet (framework and sheet retaining member) in Figure 1. Figure 4 is a magnified view of the aggregate portion. These are a plan view (A), a front view from direction B (B), and a front view from direction C (C) of the bottom member. This is a magnified view of the left side of Figure 14. This is a magnified view of the right side of Figure 14. This is a cross-sectional view of the upper guided portion, wire fixing portion, and lower guided portion of the bottom member. The guide rails according to this embodiment are shown, with the right figure representing the first guide rail and the left figure representing the second guide rail. This is a magnified view of the upper guided portion of Figure 17. Figure 17 is a magnified view of the wire fixing section. This is a magnified view of the lower guided portion of Figure 17. This is a magnified view of the end portion in the width direction of the sheet in Figure 1 (the upper frame of the bottom member and the sheet retaining member). This is a diagram showing the end plate assembly of the bottom member. Figure 4 is a side view of the lower part of the shutter curtain in the fully closed position. This shows a configuration in which the height positions of a pair of wire fixing parts provided on the end plate of the bottom member are different. This is a partially enlarged view showing the upper winding device in Figure 4. This is a magnified view of a portion of the plan view shown in Figure 3. This is a partially enlarged plan view of the upper portion of the sheet shutter according to the first embodiment, showing the upper limit switch and the emergency switch (the beam H and mounting plate P are omitted). This is a vertical cross-sectional view of the upper part of the sheet shutter (with the opening fully open), showing the upper limit switch in the OFF position. This is a vertical cross-sectional view of the upper part of the sheet shutter (with the opening fully open), showing the emergency switch in the OFF position. This shows the operating and locking parts of the locking device of the bottom lock mechanism (viewed from the indoor side). This shows the locking mechanism of the bottom lock mechanism (Figure 30 viewed from the right or Figure 32 viewed from the left). The bottom locking mechanism is shown, with the locking part indicated by the solid line being the locked position and the locking part indicated by the dashed line being the unlocked position. This is a cross-sectional view of the widthwise end of the bottom member, showing the bottom locking mechanism. This is a partial longitudinal cross-sectional view showing the overlapping state of the frame and bottom member of a shutter curtain in its fully open position. This is a front view showing a sheet according to the first embodiment. This is a front view of the sheet shutter according to the second embodiment (with the opening fully closed). This is a front view of the sheet shutter according to the second embodiment (with the opening fully open). This is the upper end portion of the sheet shutter plan view and front view according to the second embodiment. This is a partial enlarged view of Figure 38. Figure 36 shows longitudinal cross-sectional views; the left figure shows longitudinal cross-sectional views of the upper and middle sections, and the right figure shows longitudinal cross-sectional views of the upper and lower sections. This is a side view of the shutter curtain according to the second embodiment (with the opening fully closed). This is a vertical side view of the upper and middle portions of the shutter curtain according to the second embodiment (with the opening fully closed). Figure 37 shows longitudinal cross-sectional views; the left figure shows longitudinal cross-sectional views of the upper and middle sections, and the right figure shows longitudinal cross-sectional views of the upper and lower sections. This figure shows the positional relationship between the intermediate guide rail 3 and the folded lower portion (overlapping bottom member and frame) when the opening of the sheet shutter according to the second embodiment is fully open (the folded sheet is omitted). The second embodiment shows a vertical cross-sectional view of a shutter curtain (with the opening fully open), with the left figure being a vertical cross-sectional view of the upper and middle sections, and the right figure being a vertical cross-sectional view of the upper and lower sections. This is a partially enlarged view of the first side in the visible width direction of the intermediate opening of the opening that is opened and closed by the shutter curtain according to the second embodiment. This is a partially enlarged view of the second side in the visible width direction of the intermediate opening of the opening that is opened and closed by the shutter curtain according to the second embodiment. This figure shows the closed state of the first side in the width direction of the intermediate opening shown in Figure 45. This figure shows the closed state of the second side in the visible width direction of the intermediate opening shown in Figure 46. This is a diagram showing the panel body of the intermediate section (second intermediate section). This is a plan view of the structural members of the upper part of the shutter curtain according to the second embodiment. This is a plan view of the bottom member (upper bottom) of the upper part of the shutter curtain according to the second embodiment. This figure shows the bottom member and intermediate portion of the upper part of the shutter curtain according to the second embodiment. This is a partially enlarged view of the first side of the bottom member of the upper portion of the shutter curtain according to the second embodiment. This is a partially enlarged view of the second side of the bottom member of the upper portion of the shutter curtain according to the second embodiment. Figure 51 is a partially enlarged view of the lower part of the first intermediate portion provided on the bottom member of the upper part of the shutter curtain according to the second embodiment. This is a partially enlarged view of the lower part of the second intermediate portion provided on the bottom member of the upper part of the shutter curtain according to the second embodiment shown in Figure 51. This is a longitudinal cross-sectional view showing the side of an intermediate guide rail provided in the middle section of the shutter curtain according to the second embodiment shown in Figure 51. This diagram shows the upper end of the first guide rail of the lower guide rail. This is a front view of the widthwise end of the intermediate section provided with the intermediate guide rail according to the second embodiment; the left figure shows the first guide rail, and the right figure shows the second guide rail. This diagram shows the alignment of the lower end of the intermediate guide rail and the upper end of the lower guide rail according to the second embodiment. This diagram shows the alignment of the intermediate guide rail and the lower end of the intermediate section with the upper end of the lower guide rail according to the second embodiment. This is a partially enlarged plan view of the upper portion of the sheet shutter according to the second embodiment, showing the upper limit switch and the emergency switch (the beam H and mounting plate P are omitted). In the second embodiment, this is a partial longitudinal cross-sectional view showing the overlapping state of the frame and bottom member of the shutter curtain in the fully open state. This is a front view showing a sheet according to the second embodiment.

Detailed description of the invention

The sheet shutter according to this embodiment will be described in detail with reference to the drawings. In this specification, the present invention will be described based on two embodiments, the first embodiment and the second embodiment. The main difference between the first embodiment and the second embodiment is the shape of the opening and the shape of the shutter curtain. The sheet shutter according to this embodiment opens and closes a large opening, but the size of the opening and the shutter curtain is not limited. In this specification, please note that "suspending wire W" may be used as a general term for wires (first wire W1, second wire W2, third wire W3), "sheet 4" as a general term for sheets (first sheet 4A, second sheet 4B, etc.), "pulley 5" as a general term for pulleys (first pulley 5A, second pulley 5B, etc.), "winding device 6" as a general term for winding devices (first winding device 6A, second winding device 6B, etc.), "mounting plate P" as a general term for mounting plates (mounting plate P1, mounting plate P2), "guide rail G" as a general term for guide rails (upper guide rail G1, lower guide rail G2, etc.), and "beam H" as a general term for beams (beam H1, H2, etc.).

[I] First Embodiment
[A] The overall configuration of the sheet shutter according to the first embodiment will be described with reference to the overall configuration diagrams 1 to 7. The sheet shutter according to the first embodiment comprises a shutter curtain 1 for opening and closing an opening, guide rails G located on both sides in the width direction of the opening and guiding both ends of the shutter curtain 1 in the width direction in the height direction, and a lifting and lowering drive device for the shutter curtain 1. In this specification, the width direction of the opening is the width direction of the shutter curtain 1 and the components of the shutter curtain 1, and means the visible direction.

The opening opened and closed by the sheet shutter 1 according to the first embodiment is rectangular. A pair of beams H1 and H2 are located above the opening and extend in the direction of the opening width. The upper end of the opening is formed by an upper end member 14, which has a dish-like cross-section and extends in the direction of the opening width, spanning the lower ends of the pair of beams H1 and H2. The lower end of the opening is defined by the floor surface FL. The ends of the opening in the width direction are defined by the left and right structural members C and the left and right guide rails G fixed to the structural members C.

The shutter curtain 1 has a predetermined depth and consists of multiple structural members extending in the opening width direction, and sheets provided on the multiple structural members. In this embodiment, the multiple structural members consist of multiple structural members 2 and a bottom member 3 located at the lowest position. The structural members 2 and the bottom member 3 have a predetermined depth. The sheet 4 according to this embodiment consists of two sheets: a first sheet 4A fixed to the first side in the depth direction of each structural member 2 and bottom member 3, forming the first visible surface of the shutter curtain 1, and a second sheet 4B fixed to the second side in the depth direction of each structural member 2 and bottom member 3, forming the second visible surface of the shutter curtain 1. When the opening is fully closed, the first sheet 4A and the second sheet 4B are spaced apart and facing each other in the depth direction. The upper ends of the first sheet 4A and the second sheet 4B are fixed to the lower surfaces of a pair of beams H1 and H2 via an upper end member 14 above the opening.

The lifting drive device comprises a wire whose lower end is connected to the bottom member 3, and a winding device provided above the opening to which the upper end of the wire is connected. The lower ends of the first wire W1 and the second wire W2 are connected to both ends in the width direction of the bottom member 3, which is located at the lowest point of the shutter curtain 1. The first wire W1 is wound around the first pulley 5A above the opening and connected to the first winding device 6A provided above the opening. The second wire W2 is wound around the second pulley 5B above the opening and connected to the second winding device 6B provided above the opening.

When the opening is closed, extending the first wire W1 and the second wire W2 causes the shutter curtain 1 to extend in an extended state, with the frame members 2 and bottom member 3 separated in the height direction and the sheets 4A and 4B facing each other and extending vertically in the height direction. When the opening is opened, winding up the first wire W1 and the second wire W2 causes the shutter curtain 1 to fold, with multiple frame members 2 and bottom member 3 overlapping in the height direction and the first sheet 4A and the second sheet 4B folded on the first and second sides, respectively.

[B] Shutter Curtain The shutter curtain 1 according to this embodiment is formed from a plurality of frame members 2 made of elongated members extending in the opening width direction and a bottom member 3 at the lower end, and a first sheet 4A and a second sheet 4B that form the first and second visible surfaces of the shutter curtain 1. In the shutter curtain 1 according to this embodiment, the frame members 2 and the sheet retaining members 7 are formed from aluminum profiles, but they may also be made of steel or stainless steel. In the components of the shutter curtain 1, elements other than the frame members 2 and the sheet retaining members 7 (excluding the sliding member 26) are formed from steel or the like.

[B-1] As shown in Figure 8, the aggregate 2 has a predetermined depth and consists of a horizontal section 20 extending in the opening width direction (visible direction) and contact sections 21, 21 provided at both ends of the horizontal section in the depth direction and extending in the opening width direction. The height dimension of the contact sections 21 is greater than the height (thickness) of the horizontal section 20, the upper end 22 of the contact section 21 is located above the upper surface 200 of the horizontal section 20, and the lower end 23 of the contact section 21 is located below the lower surface 201 of the horizontal section 20. The contact sections 21, 21 have a visible surface 210 which is a vertical surface, and the first sheet 4A and the second sheet 4B are fixed in contact with the visible surface 210, respectively (see Figure 13).

When the opening is opened, the vertically adjacent structural members 2 overlap. However, in the vertically adjacent structural members 2, one end portion 23 of the contact portion 21 of the upper structural member 2 and the upper end portion 22 of the contact portion 21 of the lower structural member 2 are concave, while the other is convex. Therefore, when the opening is opened, the lower end portion 23 of the upper structural member 2 and the upper end portion 22 of the lower structural member 2 fit together.

In this embodiment, the upper end portion 22 of the aggregate 2 is a recess, which consists of a horizontal surface 220 forming the bottom surface of the recess, an outer convex portion 221 located outside the horizontal surface 220 and having an inclined surface 2210, and a convex portion 222 located inside the horizontal surface 220. The lower end portion 23 of the aggregate 2 is a downward-facing convex portion, which consists of a horizontal surface 230 forming the lower end surface of the convex portion, an outer inclined surface 231, an inner vertical surface 232, and an inner horizontal surface 233. When vertically adjacent aggregates 2 are superimposed, the recess of the upper end portion 22 of the lower aggregate 2 fits into the convex portion of the lower end portion 23 of the upper aggregate 2 (see Figure 34).

[B-1-1] Guide Receiving Section As shown in Figures 10 and 11, horizontal guide plates 24 are fixed to both ends in the longitudinal direction of the upper surface 200 of the horizontal portion 20 of the aggregate 2. The tip side of the guide plate 24 protrudes beyond the longitudinal end of the aggregate 2, and a guide receiving section 25 is formed on the protruding portion. The guide receiving section 25 consists of a guided groove portion 250 extending in the visible direction and a wide portion 251 located on the inner side of the guided groove portion 250. The guided groove portion 250 is formed by a pair of guide elements, and in this embodiment, the pair of guide elements is a pair of sliding members 26. The sliding members 26 in this embodiment are made of a resin that has a predetermined strength and good sliding properties.

In this embodiment, the guide plate 24 is fixed to the horizontal portion 20 at its base end, which has a roughly rectangular shape in plan view. A notch 240 with a predetermined width and depth is formed at the tip end. Both sides of the opening of the notch 240 are inclined edges 241 in plan view, preventing interference with the lifting paths of the first wire W1 and the second wire W2.

A pair of sliding members 26 are provided at the opening of the notch 240, facing each other in the depth direction and spaced apart. The sliding members 26 narrow the opening of the notch 240, and the gap between the sliding members 26 forms the guided groove 250. In the notch 240, the portion at the back of the guided groove 250 is a wider portion 251 than the guided groove 250. A pair of fixing members 27 are provided at the opening of the notch 240, and each sliding member 26 is supported by each fixing member 27. As shown in Figure 9, the height dimensions of the sliding members 26 and fixing members 27 are greater than the thickness of the guide plate 24.

As shown in Figure 9, the sliding member 26 is a roughly rectangular parallelepiped with a roughly rectangular shape in plan view, and comprises a tip surface 260 that forms the guided groove 250, a base surface 261, an outer depth surface 262, and an inner depth surface 263. The tip surface 260 that forms the guided groove 250 bulges gently in plan view.

The fixing member 27 is formed from a visible piece 270, an outer recessed piece 271, and an inner recessed piece 272. The visible piece 270 and the outer recessed piece 271 form an L-shaped support portion in plan view. The base end of the sliding member 26 abuts against the visible piece 270, and the outer recessed piece 262 abuts against the outer recessed piece 271. The sliding member 26 is detachably attached to the fixing member 27 by fastening it to the outer recessed piece 271 with a screw S1 (Figure 9). The tip of the visible piece 260 protrudes beyond the tip of the outer recessed piece 271 to which the outer recessed piece 262 is attached.

[B-2] Bottom Member As shown in Figure 14, the bottom member 3 has a rectangular parallelepiped shape overall, consisting of a pair of upper frames 30 extending horizontally and parallel in the opening width direction, a pair of lower frames 31 extending horizontally and parallel in the opening width direction, and vertical end plates 32 at both ends. One upper frame 30 and one lower frame 31 are located on the first side in the depth direction, and the other upper frame 30 and one lower frame 31 are located on the second side in the depth direction. The bottom member 3 is equipped with a plurality of inclined reinforcing members 38, forming a truss structure. In this embodiment, the depth of the bottom member 3 is approximately the same as the depth of the structural members 2.

The upper frame 30 according to this embodiment is a rectangular pipe with a rectangular cross-section, and comprises a vertical side surface (visible surface) 300 and a horizontal upper surface 301. The upper surfaces 301 of the pair of upper frames 30 form the upper surface of the bottom member 3.

The lower frame 31 is a rectangular pipe with a square cross-section and has vertical side surfaces (visible surfaces) 310. The visible surfaces 300 of one upper frame 30 and 310 of the lower frame 31 form the first visible surface of the bottom member 3, while the visible surfaces 300 of the other upper frame 30 and 310 of the lower frame 31 form the second visible surface of the bottom member 3.

On the upper surface 301 of the upper frame 30, protrusions 33 are formed adjacent to the surface that the lower end portion 23 of the upper structural member 2 abuts, spaced apart in the width direction. In this embodiment, the protrusions 33 are provided on the upper surface 301, located on the inside of the surface that the lower end portion 23 of the structural member 2 abuts. In this embodiment, multiple protrusions 33 are provided at intervals in the width direction on the upper surface 301 of the bottom member 3, but they may also be elongated members extending in the opening width direction.

A buffer member 34 is provided at the lower end of the lower frame 31. The buffer member 34 is a long member extending in the width direction of the bottom member 3 (the width direction of the shutter curtain 1). Two buffer members 34 are arranged side-by-side, spaced apart in the depth direction, so that when the opening is fully closed, the buffer members 34 at the lower end of the bottom member 3 are in close contact with the floor surface FL.

As shown in Figures 17-20 and 22, the end plate 32 is a vertically elongated rectangle, forming the left and right projection surfaces of the bottom member 3. A wire fixing portion 35 is provided midway along the height of the end plate 32. An upper guided portion 36 is provided above the wire fixing portion 35 on the upper side of the end plate 32, and a lower guided portion 37 is provided below the wire fixing portion 35 on the lower side of the end plate 32. The upper guided portion 36 and the lower guided portion 37 each have a pair of guide elements. In this embodiment, the upper guided portion 36 has a pair of sliding members 362, and the lower guided portion 37 has a pair of first guide rollers 370 and second guide rollers 371. Since the upper guided portion 36 and the lower guided portion 37 are located above and below the bottom member 3 in the height direction, the tilting of the bottom member 3 can be suppressed.

[B-2-1] Wire Fixing Section As shown in Figures 19, 22, and 23, the wire fixing section 35 according to this embodiment consists of a pair of wire fixing sections 35 arranged side by side in the depth direction. Each wire fixing section 35 consists of a shaft section 350 to which the lower end of the suspension wire W is attached, a support section 351 that supports the shaft section 350, and a base 352 that extends from the end plate 32 and to which the support section 351 is fixed. The upper end of the base 352 is provided with a height adjustment means 353 consisting of a bolt or the like that extends vertically, which is used to adjust the two suspension wires W connected to the wire fixing section 35 so that there is no slack and the bottom member 3 does not tilt when the wire fixing section 35 is pulled upward.

[B-2-2] Upper Guided Section As shown in Figures 18 and 22, the upper guided section 36 consists of an upper guide plate 361 equipped with a guide receiving section 360. The upper guide plate 361 extends horizontally from the upper end of the vertical surface section 3610 fixed to the end plate 32, and the guide receiving section 360 is formed on the upper guide plate 361. The upper guide plate 361 has a notch 3611 formed on it, similar to the guide plate 24, and a pair of sliding members 362 are provided at the opening of the notch 3611 and spaced apart in the depth direction, with a guided groove formed between the sliding members 362, and the back side of the guided groove in the notch 3611 is a wider section. The sliding members 362 are fixed to a pair of fixing members 363 provided at the opening of the notch 3611 and spaced apart in the depth direction. The configuration of the guide receiving portion 360 of the bottom member 3 is the same as the configuration of the guide receiving portions 25 at both ends in the longitudinal direction of the structural member 2, and the explanation of the guide receiving portion 25 can be used as needed.

[B-2-3] Lower Guided Section As shown in Figures 20 and 22, the lower guided section 37 consists of a lower guide plate 372 equipped with a pair of first guide rollers 370 and a second guide roller 371 positioned perpendicular to the first guide rollers 370 in a plan view. The lower guide plate 372 extends horizontally from the lower end of the vertical surface section 3720 fixed to the end plate 32. A notch 3721 is formed in the lower guide plate 372, and a pair of first guide rollers 370 are spaced apart and facing each other so as to sandwich the opening of the notch 3721 from the depth direction. A guided groove, narrower than the width of the opening, is formed between the circumferential surfaces of the first guide rollers 370 facing each other in the depth direction. The second guide roller 371 is provided on the vertical surface section 3720. Furthermore, since the pair of first guide rollers 370 and second guide rollers 371, which are guide elements of the lower guided portion 37, are located at the lowest point of the shutter curtain 1, they can smoothly accommodate horizontal deviations of the shutter curtain 1 (sheet 4), including the visible direction and depth direction.

[B-3] Sheet and Sheet Fixing Structure The first sheet 4A and the second sheet 4B have a height dimension and a visible width dimension that allows the opening to be closed. The first sheet 4A and the second sheet 4B are fixed in contact with the visible surface of each structural member 2 and the visible surface of the bottom member 3 when a plurality of structural members 2 and the bottom member 3 are positioned parallel to each other with spacing in the height direction. The upper ends of the first sheet 4A and the second sheet 4B are fixed to the first visible surface 140 and the second visible surface 141 of the upper end member 14. One visible surface and the other visible surface of the structural member 2 and the bottom member 3 are flush with the first visible surface 140 and the second visible surface 141 (see Figure 5).

In this embodiment, the multiple structural members 2 and the bottom member 3 have the same depth width. The visible surfaces 210 of the contact portion 21 of each structural member 2, the visible surface 300 of the upper frame 30 of the bottom member 3, and the visible surface 310 of the lower frame 31 are located on the same vertical plane. The first sheet 4A and the second sheet 4B are fixed to the visible surfaces 210, 300, and 310 of each structural member 2 and the visible surfaces 300 and 310 of the bottom member 3 by screws S2 through a sheet retaining member 7 that extends in the sheet width direction (Figures 5, 10-13, and 18-21).

As shown in Figure 13, the sheet retaining member 7, in cross-sectional view, consists of a vertical portion 70, an upper inclined portion 71 above the vertical portion 70, and a lower inclined portion 72 below the vertical portion 70. The sheet 4 is placed in contact with the visible surfaces of the frame material 2 and the bottom member 3, with the vertical portion 70 overlapping the sheet 4 from above. The sheet 4 is then sandwiched between the vertical portion 70 and the visible surfaces, and secured with multiple screws S2 spaced apart in the opening width direction.

As shown in Figures 10-12 and 18-21, the visible width of the sheet 4 is greater than the visible width of the frame 2 and bottom member 3, and both ends of the sheet 4 in the width direction have extensions 42 that extend beyond the ends of the frame 2 and bottom member 3 in the length direction. The widthwise edge of the sheet 4 is represented by 4'. The length of the sheet retaining member 7 is longer at its ends than the length of the frame 2 and bottom member 3, and both ends of the sheet retaining member 7 in the width direction protrude beyond the ends of the frame 2 and bottom member 3 in the width direction, forming extensions 7'. The extensions 42 of the sheet 4 are fixed to the extensions 7' of the sheet retaining member 7. More specifically, the extensions 42 of the sheet 4 are fixed by screws S3, sandwiching them between the backing plate 73, which acts as a fixing member, and the extensions 7' of the sheet retaining member 7. The shape of the fixing member is not limited, but the backing plate 73 in this embodiment is a thin disc shape.

The material of the sheet 4 according to this embodiment is not limited as long as it possesses a predetermined strength and flexibility, and can be formed from known sheet materials. As shown in Figure 35, the sheet 4 according to this embodiment is formed by connecting a plurality of strip-shaped sheets 400 extending in the height direction in the width direction. Since the connection portion of the strip-shaped sheets 400 extends in the sheet height direction, the influence of the sheet's own weight on the connection portion is smaller compared to when multiple sheets are connected in the height direction (where the connection portion extends horizontally).

[C] The guide rail G is a member that is fixed to the building structure C at both ends of the opening and extends over approximately the entire height of the opening. As shown in Figures 10, 17A, and 18-20, the guide rail G according to this embodiment consists of a first guide rail 8 that is located approximately in the center of the depth of the shutter curtain 1 and extends in the visible direction, and a pair of second guide rails 9 that are located so as to sandwich the first guide rail 8 in a plan view and extend in the visible direction. In this embodiment, the lengths of the first guide rail 8 and the second guide rails 9 in the visible direction are the same. The widthwise ends of the shutter curtain 1 are guided by the guide rail G. The first guide rail 8 is received between the guide receiving portion 25 of each structural member 2, the guide receiving portion 360 of the bottom member 3, and a pair of first guide rollers 370, with the widthwise ends of the first sheet 4A located outside one of the second guide rails 9, and the widthwise ends of the second sheet 4B located outside the other second guide rail 9.

[C-1] The first guide rail 8 is located approximately in the center of the depth of the shutter curtain 1, with its base end fixed to the building structure C, and has a guide portion on its leading end in the visible direction. The guide portion of the first guide rail 8 comprises a first portion 80 located approximately in the center of the depth of the shutter curtain 1 and extending in the visible direction, and a second portion 81 extending in the depth direction at the tip of the first portion 80, and in this embodiment has a T shape in plan view. The base end of the first portion 80 is a wide portion 800, and a fixing piece 82 is formed at the base end of the wide portion 800. The first guide rail 8 is attached to the building structure C by fixing the fixing piece 82 to the building structure C with bolts.

[C-2] Second guide rail (seat guide)
The second guide rail 9 is fixed at its base end to the structure C, and its leading end portion in the visible direction is positioned on the visible surfaces of both ends in the width direction of the shutter curtain 1, so as to abut or approach both ends in the width direction of the sheet 4 from the inside. The second guide rail 9 comprises a leading end first visible piece 90, a base end second visible piece 91 located inward in the visible direction relative to the first visible piece 90, and a stepped portion 92 located between the base end of the first visible piece 90 and the leading end of the second visible piece 91. The width direction end of the sheet 4 abuts or approaches the outer surface of the first visible piece 90. A fixing piece 93 extending perpendicularly to the second visible piece 91 is provided at the base end of the second visible piece 91, and the second guide rail 9 as a whole has a roughly L shape in plan view. The pair of second guide rails 9 are positioned so as to sandwich the first guide rail 8 in plan view.

[C-3] First Guide Mechanism A first guide mechanism equipped with a first guide rail 8 will be described. Guide receiving portions 25 are provided at both ends in the width direction of the aggregate 2, consisting of a guided groove portion 250 extending in the visible direction and a wide portion 251 located behind the guided groove portion 250. A part of the first portion 80 is positioned in the guided groove portion 250 with a clearance, and the second portion 81 is positioned in the wide portion 251. The depth dimension of the second portion 81 is larger than the groove width of the guided groove portion 250 and smaller than the depth width of the wide portion 251, and the second portion 81 can be locked to the guided groove portion 250 (the inner depth surface 263 of the sliding member 26). The sliding member 26 according to this embodiment is made of a resin with good sliding properties, and even when the second portion 81 is in contact with the inner depth surface 263 of the sliding member 26, there is no obstruction to the opening and closing of the shutter curtain 1.

At both ends of the bottom member 3 in the width direction, a guide receiving portion 360 for the upper guided portion 36 is provided on the upper side, and a pair of first guide rollers 370 for the lower guided portion 37 are provided on the lower side. A portion of the first part 80 is positioned in the guided groove of the upper guide receiving portion 360 with a clearance, and the second part 81 is positioned in the wider portion. The depth of the second part 81 is greater than the groove width of the guided groove and smaller than the depth of the wider portion, allowing the second part 81 to be locked into the guided groove (the inner depth surface of the sliding member 362).

A portion of the first section 80 is positioned with clearance between the pair of first guide rollers 370 of the lower guided section 37. The projection dimension of the second section 81 is larger than the groove width between the first guide rollers 370, and the inner side surfaces of the first guide rollers 370 and the second section 81 are spaced apart and do not come into contact. The tip surface of the second section 81 is spaced apart from and facing the second guide roller 371, allowing the second guide roller 371 to slide against the tip surface of the second section 81 in accordance with the widthwise sway of the shutter curtain 1. As shown in Figure 22, the second guide roller 371 is positioned above the pair of first guide rollers 370.

With the second portion 81 of one of the first guide rails 8 in the width direction of the shutter curtain 1 engaged with the guided groove (the inner surface 263 of the sliding member 26 and the inner surface 362), the second portion 81 of the same first guide rail 8 and the side surface of the first guide roller 370 are spaced apart. Furthermore, the tip of the second portion 81 of the other first guide rail 8 in the width direction of the shutter curtain 1 maintains a spaced-apart state between the base 2510 of the wide portion 251 of the guide receiving portion 25 and the base of the wide portion of the guide receiving portion 360.

[C-4] A second guide mechanism equipped with a second guide rail 9 will be described. Both ends of the first sheet 4A in the width direction are extensions 42 that extend beyond the width direction ends of the frame material 2 and the bottom member 3. The extension 42 comprises a first portion 420 that abuts against or is close to the first visible piece 90 of one of the second guide rails 9, and a second portion 421 that is spaced apart from and opposite the second visible piece 91. The second portion 421 is fixed to the extension 7' by being sandwiched between the back plate 73 while in contact with the back surface of the extension 7' using screws S3. The second guide rail 9 is a sheet guide, and both ends of the first sheet 4A in the width direction are guided by the first visible piece 90 of the second guide rail 9 located on the back side of the first portion 420 of both ends of the first sheet 4A in the width direction.

The widthwise ends of the second sheet 4B are extended portions 42 that extend beyond the widthwise ends of the structural members 2 and the bottom member 3. Each extended portion 42 comprises a first portion 420 that abuts against or is close to the first visible piece 90 of the other second guide rail 9, and a second portion 421 that is spaced apart from and opposite the second visible piece 91. The second portion 421 is fixed to the extended portion 7' by being sandwiched between the back plate 73 and secured with screws S3 while in contact with the back surface of the extended portion 7'. The second guide rail 9 is a sheet guide, and the widthwise ends of the second sheet 4B are guided by the first visible pieces 90 of the second guide rail 9 located on the back side of the first portion 420 of the widthwise ends of the second sheet 4B.

In each second guide rail 9, the projection dimension of the stepped portion 92 of the second guide rail 9 is greater than the projection dimension of the backing plate 73 in a plan view (i.e., the thickness of the backing plate 73). The backing plate 73, located on the back surface of the second portion 421 at both ends in the width direction of the sheet 4, is spaced apart from the second visible piece 91 of the second guide rail 9, thus restricting contact between the backing plate 73 and the second visible piece 91. The backing plate 73, spaced apart from the second visible piece 91 of the second guide rail 9, is spaced outward in the visible direction relative to the stepped portion 92 of the second guide rail 9. Even when the second portion 81 is in contact with the inner projection surface 263 of the sliding member 26, contact between the stepped portion 92 of the second guide rail and the backing plate 73 is restricted.

[D] Lifting and Lowering Drive Device In this embodiment, the sheet shutter opens and closes the opening by electrically raising and lowering the shutter curtain 1 using a lifting and lowering drive device. The lifting and lowering drive device comprises a suspension wire W whose lower end is connected to a bottom member 3, and a winding device 6 provided above the opening and to which the upper end of the suspension wire W is connected. By driving the winding device 6 with an electric motor M, the upper end of the suspension wire W is wound up to move the suspension wire W upward and raise the shutter curtain 1, and by unwinding the upper end of the suspension wire W, the suspension wire W is moved downward and the shutter curtain 1 is lowered.

As shown in Figure 23, the suspension wire W according to this embodiment is a wire set consisting of two suspension wires W extending vertically opposite each other in the depth direction. The lower ends of a first wire set consisting of two first wires W1 and a second wire set consisting of two second wires W2 are connected to both ends in the width direction of the bottom member 3 located at the lowest point of the shutter curtain 1. More specifically, the first wires W1 are fixed to each of a pair of wire fixing parts 35 provided on one end plate 32 of the bottom member 3, and the second wires W2 are fixed to each of a pair of wire fixing parts 35 provided on the other end plate 32 of the bottom member 3.

As shown in Figures 10, 18, and 19, at both ends in the width direction of the shutter curtain 1, a pair of first wires W1 and a pair of second wires W2 extend vertically at positions spaced apart from the guide rails G (first guide rail 8, second guide rail 9), guide plate 24, and upper guide plate 361, respectively, so as not to come into contact with the guide rails G (first guide rail 8, second guide rail 9), guide plate 24, and upper guide plate 361. More specifically, one of the first wires W1 and W2 of the first wire set and the second wire set extends in the space between the first guide rail 8 and the second guide rail 9, respectively, while the other of the first wires W1 and W2 of the first wire set and the second wire set extends in the space between the first guide rail 8 and the other second guide rail 9, respectively. The opening of the notch 240 in the guide plate 24 has a pair of inclined edges 241 on both sides in the depth direction when viewed from above, so as not to interfere with the lifting paths of the two first wires W1 and the two second wires W2. Similar inclined edges are formed on the upper guide plate 361.

In this embodiment, an upper end member 14 extends in the width direction of the opening above the opening, and two beams H1 and H2 made of H-shaped steel extend parallel to each other in the width direction above it (see Figures 25, 26, and 27). The upper ends of the first wire set (two first wires W1) and the second wire set (two second wires W2), which extend perpendicularly in the height direction of the opening, extend in the height direction through notches 1420 formed at both ends in the longitudinal direction of the bottom surface 142 of the upper end member 14, and through the space between the pair of beams H1 and H2 (see Figure 25).

Above the opening, a first pulley 5A is positioned directly above one end of the opening in the width direction, and a second pulley 5B is positioned directly above the other end of the opening in the width direction. On the ceiling surface above the opening, a first winding device 6A and a second winding device 6B are positioned directly above the approximate center of the opening in the width direction. The first pulley 5A is arranged side-by-side in the depth direction to form a first pulley set, and the second pulley 5B is arranged side-by-side in the depth direction to form a second pulley set.

As shown in Figures 1-3 and 26, the two first wires W1 are wound around the first pulleys 5A of the first pulley set above the opening, extending toward the center of the opening and connected to the first winding device 6A, making them windable onto the first winding device 6A. The two first wires W1 are wound onto a common winding drum 60 of the first winding device 6A. One first wire W1 is wound onto one half 61 of the winding drum 60, which extends in the forward direction, and the other first wire W1 is wound onto the other half 62.

As shown in Figures 1 to 3, the two second wires W2 are wound around the second pulleys 5B of the second pulley set above the opening, extending toward the center of the opening and connected to the second winding device 6B, making them windable onto the second winding device 6B. The two second wires W2 are wound onto a common winding drum 60 of the second winding device 6B. One second wire W2 is wound onto one half 61 of the winding drum 60, which extends in the forward direction, and the other second wire W2 is wound onto the other half 62.

A pair of beams H1 and H2 extend parallel to each other in the width direction of the opening above the opening. A beam H3 is positioned spaced apart on the indoor side of these two beams. Multiple mounting plates P are provided perpendicular to beams H1, H2, and H3, spanning the upper surfaces of the three beams. A pulley 5 is provided on mounting plate P1, located above the end of the opening in the width direction. A winding device 6 is provided on mounting plate P2, located above the approximate center of the opening in the width direction.

The two first wires W1 constituting the first wire set are wound onto a common winding drum 60 of the first winding device 6A, and the two second wires W2 constituting the second wire set are wound onto a common winding drum 60 of the second winding device 6B. In this embodiment, the mounting positions of the lower ends of the two first wires W1 of the first wire set and the lower ends of the two second wires W2 of the second wire set are adjustable in the height direction. As shown in Figure 24, the base 352 of the wire fixing part 35 is fixed to the end plate 32 in a position that can be adjusted in the height direction. More specifically, the end plate 32 has an elongated hole extending in the height direction, and the height position of the wire fixing part 35 is adjusted as needed using a height adjustment means 353 located above the base 352, and then fixed to the end plate 32 with a screw S4.

[E] Shutter Opening and Closing Operation The sheet shutter according to this embodiment is electrically opened and closed by a winding device 6 driven by a motor M. When opening the opening, the first wire W1 and the second wire W2 are wound onto the winding drums 60 of the first winding device 6A and the second winding device 6B, causing the shutter curtain 1 to rise with multiple frame members 2 and bottom members 3 overlapping in the height direction, and the sheets 4A and 4B are folded outwards on the first and second sides respectively, resulting in a fully open opening state (see Figures 2, 6, and 7).

When the shutter curtain 1 rises, the upper end (upper surface 301) of the bottom member 3 abuts against the lower end 23 of the frame member 2. In adjacent frame members 2, the upper end 22 of the lower frame member 2 abuts against the lower end 23 of the upper frame member 2. The upward movement of the suspension wire W causes the upper surface 301 of the upper frame 30 of the bottom member 3 to abut against the horizontal surface 230 of the lower end 23 of the lowest frame member 2, causing that frame member 2 to move upward. The horizontal surface 220 of the upper end 22 of that frame member 2 abuts against the horizontal surface 230 of the lower end 23 of the upper frame member 2, causing that frame member 2 to move upward.

As shown in Figure 34, in a state where the bottom member 3 and the structural members 2 are superimposed, the protrusion 33 of the upper surface 301 of the bottom member 3 is located inside the downward-facing protrusions of the lower end portions 23 of the structural members 2 located on both sides in the depth direction. In this embodiment, the height of the protrusion 33 is lower than the height of the downward-facing protrusions of the lower end portions 23, and the portions that are spaced apart from the vertical surface 232 on the inside of the downward-facing protrusions are the lower vertical surface 330 and the upper inclined surface 331. When the shutter curtain 1 is moving upward (when the shutter curtain 1 is pulled up), if the bottom member 3 and the upper structural members 2 are spaced apart and shift in the depth direction, the inclined surface 331 of one of the protrusions 33 contacts the corner between the vertical surface 232 on the inside of the downward-facing protrusion and the horizontal surface 230, thereby restricting the shift. If the bottom member 3 and the upper structural member 2 are in contact and shift in the depth direction, the vertical surface 330 of one of the protrusions 33 will contact the inner vertical surface 232 of the other downward-facing protrusion, thereby restricting the shift.

As shown in Figure 34, in a state where the aggregates 2 are overlapping, the horizontal surface 220 of the recess of the upper end 22 of the lower aggregate 2 abuts against the horizontal surface 230 of the convex portion of the lower end 23 of the upper aggregate 2, the inclined surface 2210 of the recess of the upper end 22 of the lower aggregate 2 is close to or abuts against the inclined surface 231 of the convex portion of the lower end 23 of the upper aggregate 2, the inner vertical surface 232 of the downward convex portion of the lower end 23 of the upper aggregate 2 faces the inner side surface of the convex portion 222 inside the recess of the upper end 22 of the lower aggregate 2, and the upper end of the convex portion 222 faces the inner horizontal surface 233. When the shutter curtain 1 is moving upward (when the shutter curtain 1 is being pulled up), if the upper and lower structural members 2 are separated and shift in the depth direction, or if the upper and lower structural members 2 are in contact and shift in the depth direction, one of the protrusions 232 will contact the other inner protrusion 222, and the other inclined surface 2210 will contact the inclined surface 231, thereby restricting the shift.

When the shutter curtain 1 is raised, if it reaches a predetermined upper limit position, the upper limit switch ULS is activated, and the electric raising stops. In the shutter curtain 1, the upper surface 200 of the horizontal portion 20 of the uppermost frame member 2 is provided with contact portions 2000 consisting of protrusions spaced apart in the opening width direction. The upper end member 14, located above the opening, has a first visible surface 140, a second visible surface 141, and a U-shaped portion in cross-section extending from the bottom surface 142. The upper limit switch ULS is provided inside the upper end member 14, spaced apart in the opening width direction, and the detection lever of the upper limit switch ULS protrudes downward from the bottom surface 142 of the upper end member 14.

When the uppermost structural member 2 rises to its upper limit position due to the winding of the suspension wire W by the winding device 6, the contact portion 2000 of the uppermost structural member 2 contacts the detection lever from below, activating the upper limit switch ULS and stopping the motor M that drives the winding device. In the fully open state, the upper limit switch is in the OFF state. Furthermore, an emergency switch EMS is provided inside the upper end member 14 at a distance in the opening width direction, and the detection portion of the emergency switch EMS protrudes downward from the bottom surface 142 of the upper end member 14. The detection portion of the emergency switch EMS is located above the detection lever of the upper limit switch ULS.

When closing the opening, the first wire W1 and the second wire W2 are unwound from the winding drums 60 of the first winding device 6A and the second winding device 6B, respectively. As a result, the shutter curtain 1 descends with the frame 2 and bottom member 3 separated in the height direction, the sheets 4A and 4B extend vertically in the height direction, and the buffer member 34 at the lower end of the bottom member 3 touches the ground, resulting in a fully closed opening (see Figures 1, 4, and 5). When the shutter curtain 1 is rising, if it reaches a predetermined upper limit position, the upper limit switch ULS is activated and the electric upward movement stops. A lower limit switch LLS is provided at the lower end of the guide rail G to detect when the shutter curtain 1 is in the fully closed position. When the opening is fully closed, the lower limit switch LLS is in the OFF position. A detection unit 39 that contacts the lower limit switch LLS is provided at the lower end of the end plate 32 of the bottom member 3 (Figures 15 and 33).

[F] Bottom Lock Mechanism The sheet shutter according to this embodiment is equipped with a bottom lock mechanism to prevent the shutter curtain 1 from lifting up when the opening is fully closed. The bottom lock mechanism will be described with reference to Figures 16 and 30 to 33. The bottom lock mechanism consists of a locking device 15 provided at the lower end of the guide rail G and locking receiving parts 16 provided at both ends in the width direction of the bottom member 3. The locking device is provided at the lower end of the guide rail G and is equipped with a locking part 150 that can take an unlocked position and a locked position. When the opening is fully closed, the locking part in the locked position locks with the locking receiving parts, thereby restricting the lifting of the shutter curtain.

In this embodiment, the locking receiver 16 is fixed to the outdoor side in the depth direction of the lower portion of the end plate 32 of the bottom member 3, and comprises a horizontal locking surface 160 and a contact portion 161 formed on the locking surface 160. By positioning the locking portion (locking receiver 16 and locking portion 150) of the bottom lock mechanism on the outdoor side, it is effective in preventing lifting from the outside.

The locking device 15 includes a movable locking portion 150 that can switch between an unlocked and a locked position. The locking portion 150 selectively assumes either a locked or unlocked position in conjunction with the rotational operation of the operating portion 151. When the locking portion 150 is in the locked position, a block-shaped locking portion 150 is positioned directly above the locking surface 160 of the locking receiving portion 16. When the bottom member 3 at the lower end of the shutter curtain 1, which is in the fully closed position, is lifted, the locking surface 160 of the locking receiving portion 16 contacts the lower surface of the locking portion 150 from below, restricting the upward movement of the bottom member 3.

In this embodiment, the locking portion 150 is slidable between upper and lower guides 1500 and 1501 fixed to the building structure C. The operating portion 151 is rotatable between a first position and a second position. Rotating the operating portion 151 from the first position to the second position moves the locking portion 150 from an unlocked position to a locked position, and rotating the operating portion 151 from the second position to the first position moves the locking portion 150 from a locked position to an unlocked position.

The operating section 151 and the locking section 150 are interlocked via a horizontally extending shaft section 152 and a link 153 that extends roughly vertically. When the operating section 151 is in the first position, the lower end of the link 153 is pushed inward in the visible direction, and the upper end of the link 153 is pulled outward in the visible direction, causing the locking section 150 to be in the unlocked position. When the operating section 151 is in the second position, the lower end of the link 153 moves outward in the visible direction, and the upper end of the link 153 is pushed inward in the visible direction, causing the locking section 150 to be in the locked position. As the link 153 rotates, the part of the link 153 switches the detection switch MS ON/OFF.

In this embodiment, the locking receiver 16 is located on the outside of the bottom member 3 in the depth direction, the locking portion 150 is located on the outside of the guide rail G in the depth direction, and the operating portion 151 is located on the inside (inner visible surface) of the guide rail G in the depth direction. More specifically, the operating portion 151 is located on the outside of the second visible piece 91 of the indoor second guide rail 9, the shaft portion 152 penetrates the wide portion 800 of the indoor second guide rail 9 and the first guide rail 8 and is connected to a link 153 located on the inside of the outdoor second guide rail 9, and the locking portion 150 is located on the inside of the outdoor second guide rail 9 and is slidable in the visible direction along the guides 1500 and 1501.

In this embodiment, the locking portion 150 is biased to a locked position by a spring 154, and when the locking portion 150 is in the unlocked position, the spring 154 is compressed. When the locking portion 150 slides to the locked position, the tip surface of the locking portion 150 contacts the contact portion 161 formed on the locking surface 160 of the locking receiving portion 16, thereby positioning the locking surface 160 in the locked position. The locking device 15 is equipped with means for maintaining the unlocked position of the locking portion 150. In this embodiment, the rotation of the shaft portion 152 is restricted by engaging the locking pin 155 with a lockable portion provided on the circumferential surface of the shaft portion 152 (there is a through hole in the second guide rail 9 on the indoor side). Normally, the locking pin 155 is in the locked state, and the rotational operation of the operating portion 151 is restricted.

The locking device 15 is equipped with a detection switch MS that detects when the locking device 15 is in the locked state. When the locking portion 150 is in the locked position, that is, when the locking device 15 is in the locked state, the detection switch MS is in the OFF state, and when the detection switch MS is in the OFF state, the electric opening and closing of the shutter curtain 1 is disabled.

The locking device 15 according to this embodiment is operated by manual operation (rotation of the operating unit 151), but the locking device 15 may also be operated electrically. Specifically, provided that the opening is fully closed (the lower limit switch LLS is OFF), the locking part is moved from the unlocked position to the locked position in response to a lock signal input from the control unit, thereby achieving the locked state. The lock signal may be transmitted by manual switch operation, or a timer may be activated after the lower limit switch LLS is OFF, transmitting the lock signal after a predetermined time. As a means of moving the locking part, for example, a method may be employed in which the locking part is biased in the locking direction by a spring, the extension of the spring which is compressed in the unlocked position is restricted, and the restriction is released by the lock signal, or the locking part is moved by a solenoid in response to the input of the lock signal.

[II] Second Embodiment
[A] The overall configuration of the sheet shutter according to the second embodiment will be described with reference to the overall configuration diagrams 36 to 44. The sheet shutter according to the second embodiment, like the sheet shutter according to the first embodiment, includes a shutter curtain 1' that opens and closes the opening, guide rails G that guide both ends of the shutter curtain 1' in the width direction in the height direction, and a lifting and lowering drive device for the shutter curtain 1'. Similar to the first embodiment, a pair of beams H1 and H2 are located above the opening and extend in the width direction of the opening, and the upper end of the opening is formed by an upper end member 14 that has a dish-shaped cross-section and extends in the width direction of the opening so as to span the lower ends of the pair of beams H1 and H2. The lower end of the opening is defined by the floor surface FL. The shape of the opening according to the second embodiment is different from the shape of the opening in the first embodiment, as will be clear from the following description.

The shutter curtain 1' according to the second embodiment consists of a wide upper portion 10, a narrow lower portion 11, and an intermediate portion 12 located below the upper portion 10 and at the same height as the upper portion of the lower portion 11. In this embodiment, the visible width of the intermediate portion 12 is greater than the visible width of the lower portion 11 and smaller than the visible width of the upper portion 10. In the illustrated configuration, the narrow lower portion 11 is positioned towards the first side relative to the center of the width direction of the wide upper portion 10.

The sheet 4 according to the second embodiment consists of an upper, wider sheet 40 and a lower, narrower sheet 41. The upper portion 10 of the shutter curtain 1' consists of multiple long structural members extending in the opening width direction and the wide sheet 40 provided on the multiple long structural members. The height dimension is variable by the long structural members being in an extended state, spaced apart in the height direction, and in a folded state, overlapping in the height direction. In the upper portion 10, the multiple long structural members consist of multiple structural members 2' and a bottom member 13 located at the lowest point of the upper portion 10.

The lower section 11 consists of multiple short structural members extending in the opening width direction, and narrow sheets 41 provided on the multiple short structural members. The height dimension is variable by the short structural members being in an extended state (spaced apart in the height direction) and a folded state (overlapping in the height direction). In the lower section 11, the multiple short structural members consist of multiple structural members 2'' and a bottom member 3'' located at the lowest point of the lower section 11 (i.e., the shutter curtain 1'').

The sheets (wide sheet 40 and narrow sheet 41) according to this embodiment consist of a first sheet 4A' that forms the first visible surface on the first side of the shutter curtain 1' and a second sheet 4B' that forms the second visible surface on the second side of the shutter curtain 1'. When the opening is fully closed, the two sheets 4A' and 4B' are spaced apart and facing each other in the depth direction. The frame members 2', 2'' and the bottom members 3', 13, and the upper end member 14 have a predetermined identical depth width. The first sheet 4A' is fixed to the first side in the depth direction of the upper end member 14, frame member 2', bottom member 13, frame member 2'', and bottom member 3', while the second sheet 4B' is fixed to the second side in the depth direction of the upper end member 14, frame member 2', bottom member 13, frame member 2'', and bottom member 3'. In the second embodiment, the wide sheet 40 and the narrow sheet 41 are formed from common sheets 4A' and 4B'.

The bottom member 13 of the upper portion 10 comprises a first portion 13A located directly above the structural member 2'' of the lower portion 11, a second portion 13B located on the first side of the first portion 13A in the visible width direction (length direction), and a third portion 13C located on the second side of the first portion 13A in the visible width direction (length direction). A first intermediate portion 12A is provided below the second portion 13B of the bottom member 13 of the upper portion 10, and a second intermediate portion 12B is provided below the third portion 13C of the bottom member 13. The intermediate portions 12 (first intermediate portion 12A, second intermediate portion 12B) are located laterally to the upper portion of the lower portion 11. The intermediate portion 12 is a panel body formed by joining multiple square pipes in a frame-like structure, and its height dimension remains constant.

The opening opened and closed by the sheet shutter 1' according to the second embodiment consists of a wide upper opening, a narrow lower opening, and an intermediate opening located between the upper and lower openings, which is narrower than the upper opening and wider than the lower opening. The upper end of the opening (upper opening) is defined by the upper end member 14, and the lower end of the opening (lower opening) is defined by the floor surface FL.

The widthwise ends of the upper opening are defined by the upper guide rail G1, and the widthwise ends of the lower opening are defined by the lower guide rail G2. The widthwise ends of the intermediate opening are defined by the intermediate side wall C1. At the lower end of the upper opening, the portion located outside the widthwise ends of the intermediate opening is the upper floor surface FL1. At the lower end of the intermediate opening, the portion located outside the widthwise ends of the lower opening is the intermediate floor surface FL2.

When the opening is closed, the wider upper portion 10 of the shutter curtain 1' is positioned in the wider upper opening, the upper portion of the intermediate portion 12 and the narrow lower portion 11 are positioned in the intermediate opening, and the remaining portion of the lower portion 11 is positioned in the narrow lower opening. In this embodiment, the intermediate portion 12 consists of a first intermediate portion 12A and a second intermediate portion 12B. The space between the first intermediate portion 12A and the second intermediate portion 12B corresponds to the visible width dimension of the lower portion 11. An intermediate guide rail G3 is provided on the portion facing the space between the first intermediate portion 12A and the second intermediate portion 12B, positioned directly above the lower guide rail G2.

At both ends in the width direction of the bottom member 3', which is located at the lowest point of the shutter curtain 1', the lower ends of a first wire set consisting of two first wires W1 and a second wire set consisting of two second wires W2 are connected, respectively. The first wires W1 extend vertically along the first side in the width direction of the lower portion 11, and are further inserted through the upper portion 10 in the height direction, wound around the first pulley set 5A above the opening, and connected to the first winding device 6A provided above the opening. The second wires W2 extend vertically along the second side in the width direction of the lower portion 11, and are further inserted through the upper portion 10 in the height direction, wound around the second pulley set 5B above the opening, and connected to the second winding device 6B provided above the opening.

A third wire set consisting of two third wires W3 is connected to the second side of the bottom member 13 of the upper portion 10 in the longitudinal direction (opposite the first side where the lower portion 11 is located). The third wires W3 are wound around the third pulley set 5C above the opening and connected to the third winding device 6C located above the opening. The upper ends of the third wire set (the two third wires W3) extend in the height direction through a notch 1420 formed at the second end of the bottom surface 142 of the upper end member 14 in the longitudinal direction, and through the space between the pair of beams H1 and H2 (see Figure 60).

In other words, the sheet shutter according to the second embodiment opens and closes the opening by electrically raising and lowering the shutter curtain 1' using a lifting drive device. The lifting drive device comprises a first wire set (two first wires W1) and a second wire set (two second wires W2) whose lower ends are connected to both ends of the bottom member 3' of the lower portion 11; a third wire set (two third wires W3) whose lower end is provided at one end in the width direction of the bottom member 13 of the upper portion 10; a first pulley set (two first pulleys 5A) around which the two first wires W1 are wound, a second pulley set (two second pulleys 5B) around which the two second wires W2 are wound, a third pulley set (two third pulleys 5C) around which the two third wires W3 are wound; a first winding device 6A capable of winding and unwinding the two first wires W1; a second winding device 6B capable of winding and unwinding the two second wires W2; and a third winding device 6C capable of winding and unwinding the two third wires W3.

When the opening is closed, the first winding device 6A, the second winding device 6B, and the third winding device 6C extend the first wire W1, the second wire W2, and the third wire W3, causing the shutter curtain 1' to extend with the bottom member 3', frame members 2'', bottom member 13, and frame members 2' separated in the height direction, and the sheets 4A' and 4B' extended vertically in the height direction. When the opening is fully closed, the lower limit switch LLS is in the OFF position.

The sheet shutter according to the second embodiment, like the sheet shutter according to the first embodiment, is equipped with a bottom lock mechanism to prevent the shutter curtain 1' from lifting when the opening is fully closed. The bottom lock mechanism consists of a locking device 15 provided at the lower end of the lower guide rail G2 and locking receivers 16 provided at both ends in the width direction of the bottom member 3'. The locking device, provided at the lower end of the lower guide rail G2, has locking parts that can assume both an unlocked and a locked position. When the opening is fully closed, the locking part in the locked position engages with the locking receivers, thereby restricting the lifting of the shutter curtain 1'. Details of the bottom lock mechanism can be found by referring to the description in the first embodiment.

When the opening is opened, the first winding device 6A, the second winding device 6B, and the third winding device 6C wind up the first wire W1, the second wire W2, and the third wire W3, resulting in the shutter curtain 1' being folded, with the bottom member 3', frame members 2'', bottom member 13, and frame members 2' overlapping in the height direction, and the sheets 4A' and 4B' folded on the first and second sides, respectively. When the shutter curtain 1' is raised and reaches a predetermined upper limit position, the upper limit switch ULS activates, stopping the electric raising. A lower limit switch LLS is provided at the lower end of the lower guide rail G2 to detect when the shutter curtain 1' is in the fully closed position.

[B] Shutter Curtain
[B-1] Overall Shape The shutter curtain 1' according to the second embodiment consists of a wide upper portion 10, a narrow lower portion 11, and an intermediate portion 12 that is fixed below the upper portion 10 and at the same height as the upper portion of the lower portion 11. The configuration of the shutter curtain 1' according to the second embodiment has many parts in common with the configuration of the shutter curtain 1 according to the first embodiment, and it should be noted that the description according to the first embodiment can be referenced or considered as needed. In the shutter curtain 1' according to this embodiment, the frame members 2', 2'' and the sheet retaining member 7 are formed from aluminum profiles, but they may also be made of steel or stainless steel. In the components of the shutter curtain 1', elements other than the frame members 2', 2'' and the sheet retaining member 7 (excluding sliding members) are formed from steel or the like.

The upper section 10 consists of multiple long structural members 2' extending in the opening width direction, a bottom member 13 (upper bottom) located below the lowest structural member 2', and a wide sheet 40 provided on the multiple long structural members 2' and the bottom member 13. The uppermost structural member 2' of the upper section 10 is located at the upper end of the shutter curtain 1' and has a contact portion that contacts the upper limit switch ULS and the emergency switch EMS (see Figure 60).

The lower section 11 consists of multiple short structural members 2'' extending in the opening width direction, a bottom member 3'' (lower bottom) located below the lowest structural member 2'', and a narrow sheet 41 provided on the multiple short structural members 2'' and the bottom member 3''. The lowest bottom member 3'' of the lower section 11 is located at the lower end of the shutter curtain 1'' and has a contact portion with the lower limit switch LLS located at the lower end of the lower guide rail G2.

The intermediate section 12 consists of a first intermediate section 12A, located at the lower end of the upper section 10 and adjacent to the first side in the visible width direction of the upper section of the lower section 11, and a second intermediate section 12B, located at the lower end of the upper section 10 and adjacent to the second side in the visible width direction of the upper section of the lower section 11. The distance between the first intermediate section 12A and the second intermediate section 12B corresponds to the visible width dimension of the lower section 11. An intermediate guide rail G3 is provided on the opposing faces of the first intermediate section 12A and the second intermediate section 12B, extending in the height direction, to guide both ends of the lower section 11 in the width direction. Details of the configuration of the intermediate section 12 will be described later.

[B-2] The structure of the aggregate 2' in the upper part 10 and the aggregate 2'' in the lower part 11 is the same as the structure of aggregate 2 according to the first embodiment, except for the length dimension, and the description of aggregate 2, including the reference numbers, can be appropriately referred to, for example, Figure 8. Specifically, the aggregates 2' and 2'' consist of a horizontal part 20 having a predetermined depth and extending in the opening width direction (visible direction), and contact parts 21, 21 provided at both ends of the horizontal part in the depth direction and extending in the opening width direction, the height dimension of the contact part 21 is greater than the height (thickness) of the horizontal part 20, the upper end 22 of the contact part 21 is located above the upper surface 200 of the horizontal part 20, and the lower end 23 of the contact part 21 is located below the lower surface 201 of the horizontal part 20. The contact portions 21, 21 are provided with a vertical surface, which is a visible surface 210, and the first sheet 4A' and the second sheet 4B' are fixed in contact with the visible surface 210, respectively.

In this embodiment, the upper end portions 22 of the aggregates 2' and 2'' are recessed. The recess consists of a horizontal surface 220 forming the bottom surface of the recess, an outer convex portion 221 located outside the horizontal surface 220 and equipped with an inclined surface 2210, and a convex portion 222 located inside the horizontal surface 220. The lower end portions 23 of the aggregates 2' and 2'' are downward-facing convex portions. The convex portion consists of a horizontal surface 230 forming the lower end surface of the convex portion, an outer inclined surface 231, an inner vertical surface 232, and an inner horizontal surface 233. When vertically adjacent aggregates 2' and 2'' are superimposed, the recesses of the upper end portions 22 of the lower aggregates 2' and 2'' fit into the convex portions 23 of the lower aggregates 2' and 2''.

Horizontal guide plates 24 are fixed to both ends in the longitudinal direction of the upper surface 200 of the horizontal portion 20 of the aggregate members 2' and 2''. The leading edge of the guide plate 24 protrudes beyond the longitudinal end of the aggregate members 2' and 2'', and a guide receiving portion 25 is formed on the protruding portion. The guide receiving portion 25 consists of a guided groove portion 250 extending in the visible direction and a wide portion 251 located behind the guided groove portion 250. For specific details of the guide plate 24 and guide receiving portion 25, refer to the description of the guide plate 24 and guide receiving portion 25 in the first embodiment.

The upper section 10's structural member 2' differs from the structural member 2 according to the first embodiment in that it has insertion sections for inserting the two first wires W1 of the first wire set and the two second wires W2 of the second wire set in the height direction. As shown in Figure 49, the horizontal section 20 of each structural member 2' has four openings 202 located in the vertical path of the two first wires W1 and the two second wires W2, and the two first wires W1 and the two second wires W2 extend in the height direction of the upper section 10 by passing through the openings 202. Furthermore, as shown in Figure 60, the bottom surface 142 of the upper end member 14 also has four openings 1400 located in the vertical path of the two first wires W1 and the two second wires W2, and the two first wires W1 and the two second wires W2 extend upwards above the openings by passing through the openings 1400.

[B-3] Bottom component
[B-3-1] The configuration of the bottom member 3' of the lower bottom portion 11 is the same as the configuration of the bottom member 3 of the shutter curtain 1 according to the first embodiment, and the description of the bottom member 3, including the reference numbers, can be appropriately referred to, for example, Figures 14 to 23. Specifically, the bottom member 3' has a rectangular parallelepiped shape as a whole, consisting of a pair of upper frames 30 extending horizontally and parallel in the opening width direction, a pair of lower frames 31 extending horizontally and parallel in the opening width direction, and vertical end plates 32 at both ends. One upper frame 30 and one lower frame 31 are located on the first side in the depth direction, and the other upper frame 30 and one lower frame 31 are located on the second side in the depth direction. The bottom member 3' has a truss structure, with a plurality of inclined reinforcing members 38.

In this embodiment, the upper frame 30 is a rectangular pipe with a rectangular cross-section, and comprises a vertical side surface (visible surface) 300 and a horizontal top surface 301. The top surfaces 301 of the pair of upper frames 30 form the top surface of the bottom member 3'. The lower frame 31 is a rectangular pipe with a rectangular cross-section, and comprises a vertical side surface (visible surface) 310. The visible surface 300 of one upper frame 30 and the visible surface 310 of the lower frame 31 form the first visible surface of the bottom member 3', while the visible surface 300 of the other upper frame 30 and the visible surface 310 of the lower frame 31 form the second visible surface of the bottom member 3'.

On the upper surface 301 of the upper frame 30, protrusions 33 are formed adjacent to the surface that the lower end 23 of the upper structural member 2'' abuts, spaced apart in the width direction. In this embodiment, the protrusions 33 are provided on the upper surface 301, located on the inside of the surface that the lower end 23 of the structural member 2'' abuts. In this embodiment, multiple protrusions 33 are provided at intervals in the width direction on the upper surface 301 of the bottom member 3'', but they may also be elongated members extending in the opening width direction.

A buffer member 34 is provided at the lower end of the lower frame 31. The buffer member 34 is a long member extending in the width direction of the bottom member 3' (the width direction of the shutter curtain 1'). Two buffer members 34 are arranged side-by-side, spaced apart in the depth direction, so that when the opening is fully closed, the buffer members 34 at the lower end of the bottom member 3' are in close contact with the floor surface FL.

The end plate 32 is a vertically elongated rectangle and forms the left and right projection surfaces of the bottom member 3'. A wire fixing portion 35 is provided midway along the height of the end plate 32. An upper guided portion 36 is provided above the wire fixing portion 35 on the upper side of the end plate 32, and a lower guided portion 37 is provided below the wire fixing portion 35 on the lower side of the end plate 32. The upper guided portion 36 and the lower guided portion 37 each have a pair of guide elements. In this embodiment, the upper guided portion 36 has a pair of sliding members 362, and the lower guided portion 37 has a pair of first guide rollers 370 and second guide rollers 371.

[B-3-2] Upper bottom As shown in Figures 50 and 51, the bottom member 13 of the upper part 10 consists of a first part 13A located directly above the structural member 2'' of the lower part 11, a second part 13B located on the first side of the visible width direction (length direction) of the first part 13A, and a third part 13C located on the second side of the visible width direction (length direction) of the first part 13A. In this embodiment, the third part 13C is formed by connecting a plurality of short elements via end plates 132. One end of the first part 13A and one end of the second part 13B are connected via a first joint part 13D, and the other end of the first part 13A and one end of the third part 13C are connected via a second joint part 13E. The first joint section 13D is located in the lifting path of the first wire set (two first wires W1), and the second joint section 13E is located in the lifting path of the second wire set (two second wires W2).

As shown in Figures 52 and 53, the bottom member 13 has a rectangular parallelepiped shape overall, comprising a pair of upper frames 130 extending horizontally and parallel in the opening width direction, a pair of lower frames 131 extending horizontally and parallel in the opening width direction, and end plates 132 at both ends (the other end of the second section 13B and the other end of the third section 13C). One upper frame 130 and one lower frame 131 are located on the first side in the depth direction, and the other upper frame 130 and one lower frame 131 are located on the second side in the depth direction. The first section 13A, the second section 13B, and the third section 13C of the bottom member 13 are equipped with a plurality of inclined reinforcing members 139, forming a truss structure. In this embodiment, the visible width of the first portion 13A of the bottom member 13 is approximately the same as the visible width of the bottom member 3'. No reinforcing material 139 is provided inside the first joint portion 13D and the second joint portion 13E located at both ends of the first portion 13A, and sufficient space (wire insertion portion) is formed for inserting the suspension wire W in the height direction.

In this embodiment, the upper frame 130 is a rectangular pipe with a rectangular cross-section, and comprises a vertical side surface (visible surface) 1300 and a horizontal top surface 1301. The top surfaces 1301 of the pair of upper frames 130 form the top surface of the bottom member 13. The lower frame 131 is a rectangular pipe with a rectangular cross-section, and comprises a vertical side surface (visible surface) 1310. The visible surface 1300 of one upper frame 130 and the visible surface 1310 of the lower frame 131 form the first visible surface of the bottom member 13, while the visible surface 1300 of the other upper frame 130 and the visible surface 1310 of the lower frame 131 form the second visible surface of the bottom member 13.

On the upper surface 1301 of the upper frame 130, protrusions 133 are formed adjacent to the surface that the lower end 23 of the upper structural member 2' abuts, spaced apart in the width direction. In this embodiment, the protrusions 133 are provided on the upper surface 1301, located on the inside of the surface that the lower end 23 of the structural member 2' abuts. In this embodiment, multiple protrusions 133 are provided at spaced intervals in the width direction on the upper surface 1301 of the bottom member 13, but they may also be elongated members extending in the opening width direction.

On the lower surface 1311 of the lower frame 131, protrusions 134 are formed adjacent to the surface that the upper end 22 of the lower structural member 2'' abuts, spaced apart in the width direction (see Figure 61). In this embodiment, the protrusions 134 are provided on the lower surface 1311, located on the inside of the surface that the upper end 22 of the structural member 2'' abuts. In this embodiment, multiple protrusions 134 are provided at intervals in the width direction on the lower surface 1311 of the bottom member 13, but they may also be elongated members extending in the opening width direction.

The end plate 132 is a vertical rectangular plate that forms the left and right projection surfaces of the bottom member 13. The second end plate 132 in the longitudinal direction (visible width direction) of the bottom member 13 has a wire fixing portion 135 located midway in the height direction. Both end plates 132 have an upper guide portion 136 and a lower guide portion 137. A guide roller 138, acting as an intermediate guide portion, is located between the upper and lower guide portions 136 and 137, midway in the height direction. On the second end plate 132, the guide roller 138 is positioned between a pair of wire fixing portions 135.

The wire fixing portion 135 according to this embodiment consists of a pair of wire fixing portions 135 arranged side by side in the depth direction. Each wire fixing portion 135 is configured to which the lower end of the third wire W3 is attached. The wire fixing portion 135 is fixed to the end plate 132 so as to be adjustable in the height direction. More specifically, the end plate 132 has an elongated hole extending in the height direction, and the height position of the wire fixing portion 135 can be adjusted as needed using the height adjustment means 1353 (see Figure 53). For the specific configuration of the wire fixing portion 135, refer to the description of the wire fixing portion 35 in the first embodiment.

The upper guided portion 136 and the lower guided portion 137 have the same configuration as the upper guided portion 36 of the bottom member 3 according to the first embodiment, and the description of the upper guided portion 36 can be referenced as needed. Furthermore, the configuration of the guide receiving portions of the upper guided portion 136 and the lower guided portion 137 is the same as the configuration of the guide receiving portions 25 at both ends in the longitudinal direction of the aggregate 2, and the description of the guide receiving portion 25 (which comprises a pair of sliding members 26 and a pair of fixing members 27) can be referenced as needed. Regarding the guide roller 138, the description of the second guide roller 371 in the first embodiment can be referenced.

[B-4] Sheet and Sheet Fixing Structure In this embodiment, the upper end member 14, multiple rib members 2', bottom member 13, multiple rib members 2'', and bottom member 3' have the same depth, and the first sheet 4A' and the second sheet 4B' are fixed by a sheet pressing member 7 extending in the sheet width direction with screws S2 while in contact with the first visible surface 140 and the second visible surface 141 of the upper end member 14, the visible surfaces 210 of each rib member 2' and 2'', the visible surfaces 300 and 310 of the bottom member 3', and the visible surfaces 1300 and 1310 of the bottom member 13. The fixing structure at both ends in the sheet width direction is substantially the same as the fixing structure at both ends in the width direction of the sheet 4 according to the first embodiment, and the description in the first embodiment can be used as a reference for the specific configuration.

The visible width of the wide sheet 40 is greater than the visible width of the frame members 2' and the bottom member 13. Both ends of the wide sheet 40 in the width direction extend beyond the ends of the frame members 2' and the bottom member 13 in the length direction, providing extensions 42. The length of the sheet retaining member 7, which secures the wide sheet 40, is longer at its ends than the length of the frame members 2' and the bottom member 13. Both ends of the sheet retaining member 7 in the width direction protrude beyond the ends of the frame members 2' and the bottom member 13 in the width direction, forming extensions 7'. The extensions 42 of the sheet 4 are fixed to the extensions 7' of the sheet retaining member 7. More specifically, the extensions 42 of the sheet 4 are sandwiched between the backing plate 73 (which acts as a fixing member) and the extensions 7' of the sheet retaining member 7, and secured with screws S3.

The visible width of the narrow sheet 41 is greater than the visible width of the frame members 2'' and the bottom member 3''. Both ends of the narrow sheet 41 in the width direction extend beyond the longitudinal ends of the frame members 2'' and the bottom member 3''. The length of the sheet retaining member 7, which secures the narrow sheet 41, is longer at its ends than the length of the frame members 2'' and the bottom member 3''. Both ends of the sheet retaining member 7 in the width direction protrude beyond the longitudinal ends of the frame members 2'' and the bottom member 3'', forming an extension 7''. The extension 42 of the sheet 4 is fixed to the extension 7'' of the sheet retaining member 7. More specifically, the extension 42 of the sheet 4 is sandwiched between the backing plate 73 (which acts as a fixing member) and the extension 7'' of the sheet retaining member 7 and secured with a screw S3.

The material of the sheet 4 according to this embodiment is not limited as long as it has predetermined strength and flexibility, and can be formed from known sheet materials. As shown in Figure 62, the sheet 4 according to this embodiment is formed by connecting a plurality of strip-shaped sheets extending in the height direction in the width direction. Specifically, the plurality of strip-shaped sheets consist of a plurality of first strip-shaped sheets 4000, 4000' having a first height (the total height of the shutter curtain 1') consisting of a wide sheet 40 and a narrow sheet 41, and a plurality of second strip-shaped sheets 4100 having a second height consisting only of the wide sheet 40. The first strip-shaped sheet 4000' is a sheet in which one half has the first height and the other half has the second height. The first strip-shaped sheet 4000' is a single sheet piece and has a corner formed by the lower end of the wide sheet 40 and the upper end of the narrow sheet 41, and the connection part of the plurality of strip-shaped sheets is not located at the corner. Because the connecting sections of the strip-shaped sheets 4000, 4100, and 4000' extend in the height direction of the sheet, the impact of the sheet's own weight on the connecting section is smaller compared to when multiple sheets are connected in the height direction (where the connecting section extends horizontally).

[B-5] Intermediate Section The intermediate section 12 will be described with reference to Figures 42, 51, 54, and 55. The first intermediate section 12A is located below the second section 13B of the bottom member 13 of the upper section 10 of the shutter curtain 1', and the second intermediate section 12B is located below the third section 13C of the bottom member 13. The intermediate section 12 (first intermediate section 12A, second intermediate section 12B) is located to the side of the upper section of the lower section 11.

The intermediate section 12 is a panel body having predetermined height, depth, and width dimensions, and its upper end is fixed to the lower surface of the second section 13B of the bottom member 13 of the upper section 10. More specifically, the intermediate section 12 according to this embodiment consists of a panel body assembled from a plurality of square pipe-shaped frames corresponding to each side of a rectangular parallelepiped (frames extending horizontally in the width direction, frames extending horizontally in the depth direction, and frames extending vertically). A sheet 120 is attached to the visible surface of the panel body. The sheet 120 is attached to a predetermined frame of the panel body with screws using a sheet retaining member 7. The panel body according to this embodiment further comprises a plurality of intermediate frames. An attachment piece for the lower end of the bottom member 13 is formed on the upper surface of the panel body. An attachment piece for the intermediate guide rail G3 is formed on the inner depth surface of the panel body.

As shown in Figure 48A, the panel body of the intermediate section 12 (intermediate section 12B) comprises a first visible surface (sheet 120), a second visible surface (sheet 120), an inner (first side in the visible width direction) visible surface (a pair of vertical visible frames 127, an upper visible frame 126, and a lower visible frame 122), an outer (second side in the visible width direction) visible surface (a pair of vertical visible frames 127', an upper visible frame 126', and a lower visible frame 122'), a top surface (a pair of upper visible frames 125, upper visible frames 126, and 126'), and a bottom surface (a pair of lower visible frames 121, and lower visible frames 122 and 122'). Mounting pieces 128 for the intermediate guide rail G3 are formed on the inner visible surface. Mounting pieces 129 for the lower end of the bottom member 13 are formed on the top surface.

In this embodiment, a pair of lower lower visible frames 121 extending horizontally and parallel in the opening width direction, and a lower recessed frame 122 connecting the ends of the pair of lower visible frames 121 on the intermediate guide rail G3 side, constitute elements of the third guide means described later. An actuator 123 for activating the detection switch MS1 is provided at the lower portion of a predetermined portion in the width direction of the intermediate section 12. A pair of buffer pieces 124 projecting vertically downward from the lower end of the sheet 120 are provided at the lower end of the intermediate section 12, extending across the width direction.

The height dimension of the intermediate section 12 is approximately the same as the height dimension of the lower section 11 in its expanded/contracted state. The depth of the intermediate section 12 is approximately the same as the depth of the upper section 10 and the lower section 11. When the opening is fully closed, the wide sheet 40, the narrow sheet 41, and the sheet 120 of the intermediate section 12 are flush, forming a vertical surface. In this embodiment, the visible width dimension of the first intermediate section 12A is narrow, and the visible width dimension of the second intermediate section 12B is wide.

The first intermediate section 12A and the second intermediate section 12B have facing surfaces that are spaced apart from each other, and each facing surface is provided with an intermediate guide rail G3 extending in the height direction. As will be described later, the intermediate guide rail G3 consists of a first guide rail 8 and a pair of second guide rails 9. The intermediate guide rail G3 is located directly above the lower guide rail G2, and together with the lower guide rail G2, the intermediate guide rail G3 guides both ends of the narrow lower section 11 in the width direction. The height dimension of the intermediate guide rail G3 in this embodiment is approximately the same as the height dimension of the intermediate section 12. In the illustrated embodiment, the lower end of the intermediate guide rail G3 protrudes slightly below the lower end of the intermediate section 12.

In the fully closed position of the opening, the lower portion 11 is in a folded state, and the overlapping structural members 2'' and bottom member 3'' are located in the space between the intermediate guide rails G3, with the lower end (the lower end of the bottom member 3'') at approximately the same height as the lower end of the intermediate portion 12 (see Figure 37).

In the fully closed state of the opening, the first intermediate portion 12A closes the first side portion of the intermediate opening in the opening width direction, and the second intermediate portion 12B closes the second side portion of the intermediate opening in the opening width direction. The space between the first and second side portions of the intermediate portion is closed by the upper portion of the lower portion 11 (see Figures 36, 47, and 48).

[C] Guide mechanism
[C-1] First guide rail and second guide rail The widthwise ends of the upper portion 10 of the shutter curtain 1' according to the second embodiment are guided by left and right upper guide rails G1 provided at both widthwise ends of the upper opening, and the widthwise ends of the lower portion 11 are guided by left and right lower guide rails G2 provided at both widthwise ends of the lower opening, and left and right intermediate guide rails G3 provided in the first intermediate portion 12A and the second intermediate portion 12B. The upper guide rail G1, lower guide rail G2, and intermediate guide rail G3 according to the second embodiment each consist of a first guide rail 8 located approximately in the center of the depth of the shutter curtain 1' and extending in the visible direction, and a pair of second guide rails 9 located so as to sandwich the first guide rail 8 in a plan view and extending in the visible direction.

The first guide rail 8 is positioned approximately in the center of the depth of the shutter curtain 1', with its base end fixed to the building structure C, and a guide portion provided on its leading end in the visible direction. The guide portion of the first guide rail 8 comprises a first portion 80 extending in the visible direction from approximately the center of the depth of the shutter curtain 1', and a second portion 81 extending in the depth direction at the tip of the first portion 80. In this embodiment, it has a T-shape in plan view. The base end of the first portion 80 is a wide portion 800, and a fixing piece 82 is formed at the base end of the wide portion 800. The first guide rail 8 is attached to the building structure C by fixing the fixing piece 82 to the building structure C with bolts.

The second guide rail 9 is fixed at its base end to the building structure C, and its leading end portion in the visible direction is positioned on the visible surfaces of both ends in the width direction of the shutter curtain 1', so as to abut or approach both ends in the width direction of the sheet 4 (wide sheet 40, narrow sheet 41) from the inside. The second guide rail 9 comprises a leading end first visible piece 90, a base end second visible piece 91 located inward in the visible direction relative to the first visible piece 90, and a stepped portion 92 located between the base end of the first visible piece 90 and the leading end of the second visible piece 91. The width direction ends of the sheet 4 (wide sheet 40, narrow sheet 41) abut or approach the outer surface of the first visible piece 90. A fixing piece 93 extending perpendicularly to the second visible piece 91 is provided at the base end of the second visible piece 91, and the second guide rail 9 as a whole has a roughly L shape in plan view. A pair of second guide rails 9 are positioned to sandwich the first guide rail 8 in a plan view.

The first portion 80 of the first guide rail 8 is received between the pair of guide elements: the guide receiving portion 25 of each aggregate member 2', 2'', the upper guided portion 36 and lower guided portion 37 of the bottom member 3', and the upper guided portion 136 and lower guided portion 137 of the bottom member 13. The widthwise ends of the first sheet 4A' are located outside one of the second guide rails 9, and the widthwise ends of the second sheet 4B' are located outside the other second guide rail 9. Details of the first guide mechanism with the first guide rail 8 and the second guide mechanism with the second guide rail 9 can be found by referring to the description in the first embodiment.

[C-2] Alignment of the guide rails of the lower part The guide rails that guide both ends in the width direction of the lower part 11 of the shutter curtain 1' consist of a lower guide rail G2 and an upper intermediate guide rail G3. The intermediate guide rail G3 is a movable guide rail that moves up and down along with the vertical movement of the upper part 10 and the intermediate part 12, and is positioned directly above the fixed guide rail, the lower guide rail G2. Therefore, when the shutter curtain 1' is closed, a guide means is provided to align the upper end of the fixed lower guide rail G2 attached to the building structure with the lower end of the movable intermediate guide rail G3 attached to the upper part 10. When the upper end of the lower guide rail G2 and the lower end of the intermediate guide rail G3 are aligned to form a single guide rail that guides both ends in the width direction of the lower part 11, the upper end 96 of the second guide rail 9 of the lower guide rail G2 and the lower end 95 of the second guide rail 9 of the intermediate guide rail G3 come into contact and form a joint surface (see Figures 47, 58, and 59).

The alignment guide means will be described with reference to Figures 54 to 59. In this embodiment, the alignment guide means includes: a first guide means for aligning the lower end of the first guide rail 8 of the upper intermediate guide rail G3 with the upper end of the first guide rail 8 of the lower guide rail G2; a second guide means for aligning the lower ends 95 of the pair of second guide rails 9 of the upper intermediate guide rail G3 with the upper ends 96 of the pair of second guide rails 9 of the lower guide rail G2; and a third guide means provided on the intermediate floor surface FL2 to which the lower end of the intermediate portion 12 abuts, for positioning the intermediate portion 12 (to which the intermediate guide rail G3 is attached) in the depth direction and/or the visibility direction.

The first guide means according to this embodiment includes a first guide member 17 attached to the lower end of the wide portion 800 on the base end side of the first portion 80 of the first guide rail 8 of the intermediate guide rail G3, and a locking portion formed on the upper end of the wide portion 800 on the base end side of the first portion 80 of the first guide rail 8 of the lower guide rail G2. The first guide member 17 consists of a mounting piece 170 attached to the lower end of the first portion 80 of the first guide rail 8, and a pair of inclined first guide pieces 171 that extend downward in an expanding manner from the lower end of the first portion 80 of the first guide rail 8. When the upper intermediate guide rail G3 descends from a position spaced upward relative to the upper end of the lower guide rail G2, the first guide pieces 171 protruding downward from the lower end of the intermediate guide rail G3 lock into the locking portion on the upper end of the wide portion 800 of the first portion 80 of the first guide rail 8 of the lower guide rail G2, thereby positioning in the depth direction. In this embodiment, when fully closed (when the first guide piece 171 of the intermediate guide rail G3 is engaged with the locking portion of the lower guide rail G2), the lower end of the first guide rail 8 of the intermediate guide rail G3 and the upper end of the first guide rail 8 of the lower guide rail G2 are spaced apart (there is a gap). In this embodiment, a pair of inclined surfaces 172 (locking portions) are formed at the upper end of the wide portion 800 of the first part 80 of the first guide rail 8 of the lower guide rail G2 (see Figure 56A), and when the intermediate portion 12 descends when the opening is closed, the inclined pair of first guide pieces 171 of the first guide member 17 are guided by the inclined surfaces 172 and positioned in the depth direction. Since the first guide member 17 is formed on the wide portion 800 on the base end side of the first part 80 of the first guide rail 8, it does not interfere with the guiding function of the first guide rail 8. In the illustrated embodiment, the pair of inclined first guide pieces 171 extend in a straight line, but the shape of the first guide pieces 171 is not limited. For example, they may be a pair of inclined curved pieces 171' (Figure 43A) that extend downward in an expanding manner, or each first guide piece 171 may be an inclined piece 171'' (Figure 43A) formed from an upper inclined portion that is inclined at a first angle with respect to the vertical (an acute angle with respect to the vertical plane) and a lower inclined portion that is inclined at a second angle with respect to the vertical (a more obtuse angle with respect to the vertical plane than the first angle).

The second guide means according to this embodiment includes a second guide member 18 attached to the lower end of the first visible piece 90 of the second guide rail 9 of the intermediate guide rail G3, and the upper end portion of a pocket portion 94 formed in the first visible piece 90 of the second guide rail 9 of the lower guide rail G2. The second guide member 18 consists of an upper fixing piece 180 fixed to the second guide rail 9, and a lower second guide piece 181 protruding downward from the lower end 95 of the second guide rail 9. The tip (lower end) of the second guide piece 181 is tapered. In this embodiment, a pocket portion 94 extending in the height direction is formed on the back surface of the base end side of the first visible piece 90 of the second guide rail 9, and the fixing piece 180 of the second guide member 18 is attached to and fixed in the pocket portion 94. When the upper intermediate guide rail G3 descends from a position spaced upward relative to the upper end of the lower guide rail G2, the second guide piece 181, which protrudes downward from the lower end of the intermediate guide rail G3, engages with a pocket formed on the back surface of the base end of the first visible piece 90 of the second guide rail 9 of the lower guide rail G2, thereby positioning it in both the depth and visibility directions.

The third guide means according to this embodiment comprises a third guide member 19 provided on the intermediate floor surface FL2 to which the lower end of the intermediate portion 12 abuts, and a pair of lower visible frames 121 and lower recessed frames 122 of the intermediate portion 12. The third guide member 19 comprises a pair of visible surfaces 190, a recessed surface 191, and an upper surface 192. The upper portion of the vertical parts of the pair of visible surfaces 190 is an inclined surface 1900 that slopes upward toward each other, and the upper portion of the vertical part of the recessed surface 191 is an inclined surface 1910 that slopes upward toward the other recessed surface.

In this embodiment, two third guide members 19 are provided on the intermediate floor surface FL2, which the lower end of the first intermediate portion 12A abuts, spaced apart in the width direction and facing different directions. The third guide member 19 closer to the intermediate guide rail G3 has its inclined surface 1910 facing the side closer to the intermediate guide rail G3. Similarly, two third guide members 19 are provided on the intermediate floor surface FL2, which the lower end of the second intermediate portion 12B abuts, spaced apart in the width direction and facing different directions. The third guide member 19 closer to the intermediate guide rail G3 has its inclined surface 1910 facing the side closer to the intermediate guide rail G3.

In this embodiment, when the lower end of the intermediate guide rail G3 coincides with the upper end of the lower guide rail G2, the inner surfaces of the pair of lower visible frames 121, which extend horizontally and parallel in the opening width direction, are positioned close to or sliding against the vertical portions of the pair of visible surfaces 190 of the third guide member 19. As the intermediate portion 12 and the intermediate guide rail G3 descend from a position separated upward from the upper end of the lower guide rail G2, the inner surfaces of the lower visible frames 121 are guided by the upper inclined surfaces 1900 of the pair of visible surfaces 190 of the third guide member 19, thereby achieving positioning in the depth direction.

When the lower end of the intermediate guide rail G3 coincides with the upper end of the lower guide rail G2, the inner surface of the lower projection frame 122 of the first intermediate section 12A and the second intermediate section 12B approaches or slides against the vertical portion of the projection surface 191 of the third guide member 19. As the intermediate section 12 and the intermediate guide rail G3 descend from a position separated above the upper end of the lower guide rail G2, the inner surface of the lower projection frame 122 is guided by the upper inclined surface 1910 of the projection surface 191 of the third guide member 19 as it descends, thereby achieving positioning in the visible direction.

In this embodiment, when the shutter curtain 1' is closed, alignment is performed in the order of the third guide means, the first guide means, and the second guide means, but this order is not limited. Furthermore, the guide means may be any one of the first, second, and third guide means, or a combination of several. In the third guide means for positioning in the depth direction, the intermediate portion 12 may be positioned by sandwiching it from the depth direction using a pair of third guide members provided spaced apart in the depth direction on the intermediate floor surface FL2.

A microswitch is provided adjacent to the third guide member 19 installed on the intermediate floor surface FL2, and an actuator 123 is provided in the lower part of the intermediate section 12 such that the detection switch MS1 turns OFF when the lower end of the intermediate section 12 is guided in the depth direction and the visible direction and descends to a predetermined position. When the detection switch MS1 is in the OFF state, it can be determined that the upper section 10 and the intermediate section have descended to their lower ends, and that the lower end of the intermediate guide rail G3 and the upper end of the lower guide rail G2 are aligned. In this embodiment, four third guide members 19 are provided: two on the first intermediate floor surface FL2 located below the first intermediate section 12A, and two on the second intermediate floor surface FL2 located below the second intermediate section 12B (see Figure 37). However, it is also possible to provide two guide members: one on the first intermediate floor surface FL2 near the intermediate guide rail G3, and one on the second intermediate floor surface FL2 near the intermediate guide rail G3. Alternatively, five or more third guide members 19 may be provided on the second intermediate floor surface FL2 by providing one or more third guide members 19 between the two third guide members 19 shown in Figure 37.

[D] Shutter opening and closing operation The sheet shutter according to this embodiment is electrically opened and closed by a winding device 6 driven by an electric motor M. When opening the opening, the first wire W1, second wire W2, and third wire W3 are wound onto the winding drums 60 of the first winding device 6A, second winding device 6B, and third winding device 6C, causing the shutter curtain 1' to rise with the bottom member 3', multiple frame members 2'', bottom member 13, and multiple frame members 2' overlapping in the height direction, and the first sheet 4A' and second sheet 4B' are folded outwards on the first and second sides respectively, resulting in a fully open opening. In this embodiment, the depth dimensions of the upper part 10 and the lower part 11 of the shutter curtain 1' are approximately the same. More specifically, the projected dimensions of the structural members 2' of the upper section 10, the bottom member 13, the structural members 2'' of the lower section 11, and the bottom member 3' are approximately the same (see Figures 41 and 61).

When the shutter curtain 1' is raised, the upper end (upper surface 301) of the bottom member (lower bottom) 3' abuts against the lower end 23 of the frame member 2'', and in adjacent frame members 2'' vertically, the upper end 22 of the lower frame member 2'' abuts against the lower end 23 of the upper frame member 2''. The upper surface 301 of the upper frame 30 of the bottom member 3', which moves upward due to the upward movement of the suspension wire W, abuts against the horizontal surface 230 of the lower end 23 of the lowest frame member 2'', causing that frame member 2'' to move upward. The horizontal surface 220 of the upper end 22 of that frame member 2'' abuts against the horizontal surface 230 of the lower end 23 of the upper frame member 2'', causing that frame member 2'' to move upward.

The upper end 22 of the uppermost structural member 2'' of the upward-moving lower portion 11 abuts against the lower surface 1311 of the bottom member (upper bottom) 13 at the lower end of the upper portion 10, and the upper end (upper surface 1301) of the bottom member (upper bottom) 13 abuts against the lower end 23 of the structural member 2''. In adjacent structural members 2'', the upper end 22 of the lower structural member 2'' abuts against the lower end 23 of the upper structural member 2''. The upward movement of the suspension wire W causes the upper surface 1301 of the upper frame 130 of the upward-moving bottom member 13 to abut against the horizontal surface 230 of the lower end 23 of the lowest structural member 2'', causing that structural member 2'' to move upward. The horizontal surface 220 of the upper end 22 of that structural member 2'' abuts against the horizontal surface 230 of the lower end 23 of the upper structural member 2'', causing that structural member 2'' to move upward.

In a state where the bottom member 3' and the frame member 2'' directly above it are superimposed, the protrusion 33 of the upper surface 301 of the bottom member 3 is located inside the downward-facing protrusions of the lower end portions 23 of the frame members 2'' located on both sides in the depth direction. In this embodiment, the height of the protrusion 33 is lower than the height of the downward-facing protrusion of the lower end portion 23, and the portions that are spaced apart from the vertical surface 232 on the inside of the downward-facing protrusion are the lower vertical surface 330 and the upper inclined surface 331 (refer to Figure 34). When the shutter curtain 1' moves upward (when the shutter curtain 1' is pulled up), if the bottom member 3' and the upper frame member 2'' are spaced apart and shift in the depth direction, the inclined surface 331 of one of the protrusions 33 contacts the corner between the vertical surface 232 on the inside of the downward-facing protrusion and the horizontal surface 230, thereby restricting the shift. If the bottom member 3' and the upper structural member 2'' are in contact and shift in the depth direction, the vertical surface 330 of one of the protrusions 33 will contact the inner vertical surface 232 of the other downward-facing protrusion, thereby restricting the shift.

In a state where the aggregates 2'' of the lower portion 11 are overlapping, the horizontal surface 220 of the recess of the upper end portion 22 of the lower aggregate 2'' abuts against the horizontal surface 230 of the convex portion 23 of the lower aggregate 2'', the inclined surface 2210 of the recess of the upper end portion 22 of the lower aggregate 2'' is close to or abuts against the inclined surface 231 of the convex portion 23 of the lower aggregate 2'', the inner vertical surface 232 of the downward convex portion 23 of the lower aggregate 2'' faces the inner side surface of the convex portion 222 inside the recess of the upper end portion 22 of the lower aggregate 2'', and the upper end of the convex portion 222 faces the inner horizontal surface 233. When the shutter curtain 1 is moving upward (when the shutter curtain 1' is pulled up), if the upper and lower structural members 2'' are separated and shift in the depth direction, or if the upper and lower structural members 2'' are in contact and shift in the depth direction, the vertical surface 232 of one of the protrusions will contact the inner protrusion 222 of the other, and the inclined surface 2210 of the other will contact the inclined surface 231, thereby restricting the shift.

In a state where the bottom member 13 and the aggregate 2'' directly below it are superimposed, the upper end of the inner protrusion 222 and the upper end of the outer protrusion 221 of the upper end 22 of the aggregate 2'' abut against the lower surface 1311 of the bottom member 13, and the protrusions 134 of the lower surface 1311 of the bottom member 13 are positioned opposite the inner protrusions 222 of the upper end 22 of the aggregate 2'' located on both sides in the depth direction. In this embodiment, the protrusions 134 are provided on the lower surface 1311 of the bottom member 13 on the side away from the visible surface 1310, and the side surface located on the visible surface 1310 side is formed from an upper vertical surface 1340 and a lower inclined surface 1341 that slopes away from the visible surface 1310 from the lower end of the vertical surface 1340. When the shutter curtain 1' is moving upward (when the shutter curtain 1' is being pulled up), if the bottom member 13 and the lower frame member 2'' are separated and shift in the depth direction, the upper end of one of the inner protrusions 222 will come into contact with the inclined surface 1341 of one of the protrusions 134, thereby restricting the shift. If the bottom member 13' and the upper frame member 2'' are in contact and shift in the depth direction, the vertical surface 1340 of one of the protrusions 134 will come into contact with the visible surface of one of the inner protrusions 222, thereby restricting the shift.

In a state where the bottom member 13 and the frame member 2' directly above it are superimposed, the protrusion 133 on the upper surface 1301 of the bottom member 13 is located inside the downward-facing protrusions of the lower end portions 23 of the frame members 2' located on both sides in the depth direction. In this embodiment, the height of the protrusion 133 is lower than the height of the downward-facing protrusion of the lower end portion 23, and the portions that are spaced apart from the vertical surface 232 on the inside of the downward-facing protrusion are the lower vertical surface 1330 and the upper inclined surface 1331. When the shutter curtain 1' moves upward (when the shutter curtain 1' is pulled up), if the bottom member 13 and the upper frame member 2' are spaced apart and shift in the depth direction, the inclined surface 1331 of one of the protrusions 133 contacts the corner between the vertical surface 232 on the inside of the downward-facing protrusion and the horizontal surface 230, thereby restricting the shift. If the bottom member 13 and the upper structural member 2' are in contact and shift in the depth direction, the vertical surface 1330 of one of the protrusions 133 will contact the inner vertical surface 232 of the other downward-facing protrusion, thereby restricting the shift.

In a state where the aggregate members 2' of the lower portion 11 are overlapping, the horizontal surface 220 of the recess of the upper end portion 22 of the lower aggregate member 2' abuts against the horizontal surface 230 of the convex portion 23 of the lower end portion 23 of the upper aggregate member 2', the inclined surface 2210 of the recess of the upper end portion 22 of the lower aggregate member 2' is close to or abuts against the inclined surface 231 of the convex portion 23 of the lower aggregate member 2', the inner vertical surface 232 of the downward convex portion 23 of the lower aggregate member 2' faces the inner side surface of the convex portion 222 inside the recess of the upper end portion 22 of the lower aggregate member 2', and the upper end of the convex portion 222 faces the inner horizontal surface 233. When the shutter curtain 1' is moving upward (when the shutter curtain 1' is being pulled up), if the upper and lower structural members 2' are separated and shift in the depth direction, or if the upper and lower structural members 2' are in contact and shift in the depth direction, the vertical surface 232 of one of the protrusions will contact the inner protrusion 222 of the other, and the inclined surface 2210 of the other will contact the inclined surface 231, thereby restricting the shift.

When the opening is fully closed, the extended upper portion 10 closes the upper opening, the extended lower portion 11 closes the lower opening, and the first intermediate portion 12A, the second intermediate portion 12B, and the upper portion of the extended lower portion 11 close the intermediate opening. Both ends of the upper portion 10 in the width direction are guided by an upper guide rail G1 installed on the building structure, and both ends of the lower portion 11 in the width direction are guided by a lower guide rail G2 installed on the building structure and intermediate guide rails G3 installed on the first intermediate portion 12A and the second intermediate portion 12B.

In the fully closed position of the opening, the portions of the upper portion 10 located outside the first intermediate portion 12A and the second intermediate portion 12B at the lower end are spaced apart from the upper floor surface FL1 and do not interfere with the rail R provided on the upper floor surface FL1. While no cushioning material is provided at the lower end of the upper portion 10, cushioning material may be provided to avoid the rail R.

The lower end of the first intermediate section 12A abuts against the intermediate floor surface FL2 via a buffer piece 124, and the outer projection surface of the first intermediate section 12A and the intermediate side wall C1 are spaced apart and facing each other. The lower end of the second intermediate section 12B abuts against the intermediate floor surface FL2 via a buffer piece 124, and the outer projection surface of the second intermediate section 12B and the intermediate side wall C1 are spaced apart and facing each other. Guide rails are not provided at both ends in the width direction of the intermediate opening.

Explanation of symbols

1. Shutter Curtain (First Embodiment)
1' Shutter curtain (second embodiment)
10 Upper part (Second embodiment)
11. Lower part (Second embodiment)
12. Intermediate section (Second embodiment)
121 Lower visible frame (third guide means, first guided portion)
122 Lower frame (third guide means, second guided portion)
124 Buffer piece (buffer material)
2. Aggregates (First Embodiment)
2' Aggregates (Second Embodiment, Long Aggregates)
2'' Aggregate (Second Embodiment, Short Aggregate)
20 Horizontal section 202 Opening (wire insertion section)
220 Horizontal surface (bottom surface)
21 Contact portion 22 Upper end portion 222 Convex portion (protruding portion)
23 Lower end portion 230 Horizontal surface (tip surface)
26. Sliding member 260: Visible surface at the tip (inner visible surface)
261 Base end surface (outer surface)
3. Bottom Member (First Embodiment)
3' Bottom member (second embodiment, lower bottom)
33. Protruding part (projection)
34. Cushioning material
36 Upper guided portion 362 Sliding member 37 Lower guided portion 13 Bottom member (second embodiment, upper bottom)
13D First joint section (internal space is for wire insertion)
13E Second joint section (internal space is for wire insertion)
133. Protruding part (projection)
134. Protruding part (projection)
136 Upper guided portion 137 Lower guided portion 4 Sheet 40 Wide sheet (Second embodiment)
41 Narrow sheet (second embodiment)
42 Extending part (extending piece)
4A First Sheet (First Embodiment)
4B Second Sheet (First Embodiment)
4A' First Sheet (Second Embodiment)
4B' Second sheet (Second embodiment)
5. Pulley 5A, First Pulley 5B, Second Pulley 5C, Third Pulley (Second Embodiment)
6. Winding device 6A, First winding device 6B, Second winding device 6C, Third winding device (Second embodiment)
7. Sheet holding member 7': Extension portion (extension piece)
73. Backing plate (fixing member)
G Guide rail G1 Upper guide rail (Second embodiment)
G2 Lower guide rail (Second embodiment, fixed guide rail)
G3 Intermediate guide rail (second embodiment, movable guide rail)
8. First guide rail 80, first section 81, second section 9, second guide rail 94, pocket section (second guide means, insertion section)
14. Upper end member 1400: Opening (upper end wire insertion part)
1420 Notch (upper wire insertion section)
15 Locking device 155 Locking pin (holding means)
16 Locking receiving portion 17 First guide member (first guide means)
172 Inclined surface (first guide means, locked portion)
18. Second guide member (second guide means)
19. Third guide member (third guide means, positioning guide)
W Suspension wire W1 First wire (lower bottom suspension wire)
W2 Second wire (lower bottom suspension wire)
W3 Third wire (second embodiment) (suspension wire for upper bottom)

Claims (10)

A shutter curtain comprising a plurality of structural members including a bottom member, and sheets provided on the plurality of structural members , suspended by suspension wires ,
The shutter curtain is equipped with guide rails that guide both ends in the width direction in the height direction,
The guide rail has a first portion that is located approximately in the center of the depth width of the shutter curtain and extends in the facing direction,
The bottom member comprises a frame extending in the direction of the opening width and vertical end plates at both ends, and the lower portion of the sheet is fixed to the visible surface of the frame.
The end plate of the bottom member is provided with an upper guided portion, a lower guided portion , and a wire fixing portion to which the suspension wire is fixed .
The upper guided portion and the lower guided portion consist of a pair of guide elements that are spaced apart and facing each other in the depth direction, and the first portion of the guide rail is positioned between the pair of guide elements, and the guide elements are able to contact the first portion.
shutter. The shutter according to claim 1, wherein at least one of the upper and lower guide elements is a pair of first guide rollers. The shutter according to either claim 1 or 2, wherein at least one of the upper and lower guide elements is a pair of sliding members. The guide rail comprises a second portion extending in the depth direction at the tip of the first portion,
The end plate of the bottom member is provided with at least one second guide roller that can contact the second portion.
A shutter according to any one of claims 1 to 3. The shutter according to any one of claims 1 to 4, wherein the bottom member is located at the lowest point of the shutter curtain. The pair of guide elements in the upper guided portion are a pair of sliding members, and the pair of guide elements in the lower guided portion are a pair of first guide rollers.
The shutter according to claim 5. The shutter according to any one of claims 5 or 6 (limited to the dependent claim of claim 4), wherein the second guide roller is provided at the lower end of the bottom member. The aforementioned shutter curtain,
An upper portion consisting of multiple long aggregates and wide sheets provided on the multiple long aggregates,
It includes a lower portion consisting of a plurality of short aggregates and a narrow sheet provided on the plurality of short aggregates,
The bottom member includes the lowest upper bottom of the upper portion and the lowest lower bottom of the lower portion.
A shutter according to any one of claims 1 to 7. The upper guided portion and the lower guided portion of the upper bottom are a pair of sliding members.
The shutter according to claim 8. The shutter according to any one of claims 8 or 9 (limited to the dependent claim of claim 4), wherein the second guide roller is provided at the midpoint of the height direction of the upper bottom.