Shutter curtain

Abstract

To overlap aggregates at appropriate position when folding a shutter curtain.SOLUTION: A shutter curtain 1 includes a plurality of aggregates 2 and a sheet 4 disposed on the plurality of aggregates 2. When an opening is opened, the plurality of aggregates 2 are overlapped and folded in height direction. The aggregate 2 consists of a horizontal part 20 extending in width direction and depth direction and an abutting part 21 disposed on both sides in width direction of the horizontal part 20. For vertically adjacent aggregates 2, one of a lower end 23 of the abutting part 21 of the upper aggregate 2 and an upper end 22 of the abutting part 21 of the lower aggregate 2 is concavity and the other is convex so that the lower end 23 is fitted to the upper end 22 when the aggregates 2 are overlapped.SELECTED DRAWING: Figure 34

Description

Technical Field

[0001] The present invention relates to a shutter curtain.

Background Art

[0002] There has been proposed a shutter device including a shutter curtain composed of a plurality of aggregates extending in the opening width direction and a sheet provided on the plurality of aggregates, with a suspension wire fixed to the lower end of the shutter curtain. When the shutter curtain is opened, the suspension wire is wound up to lift and open the shutter curtain by folding the sheet while overlapping the aggregates. (Patent Documents 1 and 2).

[0003] In such a shutter device, when the shutter curtain is opened, the aggregates may be displaced and the aggregates may not properly overlap. If the aggregates overlap while the displacement remains, (a) The sheet may not be folded uniformly, (b) Abnormal noise may occur when the aggregates are displaced, (c) A load may be applied to the screws fixing the sheet to the aggregates, (d) A force other than tension may act on the sheet, and the following problems may occur.

Patent Document 1

Patent Document 2

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to overlap aggregates at appropriate positions when folding a shutter curtain including a plurality of aggregates and a sheet provided on the plurality of aggregates.

Means for Solving the Problems

[0005] The technical means adopted by the present invention is, A shutter curtain including a plurality of aggregates and a sheet provided on the plurality of aggregates is in a folded state in which the plurality of aggregates are stacked in the height direction when the opening is opened. The aggregate is composed of a horizontal portion extending in the finding direction and the prospective direction, and abutting portions provided at both ends of the horizontal portion in the prospective direction. In the aggregates adjacent vertically, one of the lower end portion of the abutting portion of the upper aggregate and the upper end portion of the abutting portion of the lower aggregate is a concave portion and the other is a convex portion, and when the aggregates are stacked, the lower end portion and the upper end portion are fitted together. It is a shutter curtain. In the embodiment described later, a downward convex portion is formed at the lower end portion of the aggregate, and a concave portion is formed at the upper end portion of the aggregate.

[0006] In one aspect, either one of the lower end portion and the upper end portion is a convex portion having an inclined surface, and the other is a concave portion having an inclined surface. The tip surface of the convex portion abuts on the bottom surface of the concave portion, and the inclined surfaces abut or are close to each other. When the shutter curtain is opened, in a state where the tip surface of the convex portion and the bottom surface of the concave portion are separated (a state where the upper end portion of the lower aggregate approaches the lower end portion of the upper aggregate), if the upper and lower aggregates are displaced in the prospective direction, at the upper and lower abutting portions on either one of the prospective directions, the tip surface of the convex portion and the corner portion of the inclined surface are guided by the inclined surface of the concave portion, and each aggregate is stacked in a normal position (the tip surface of the convex portion abuts on the bottom surface of the concave portion, and the inclined surfaces abut or are close to each other).

[0007] In one aspect, a protrusion protrudes from the concave portion on the side opposite to the inclined surface. The tip surface of the convex portion abuts on the bottom surface between the inclined surface and the protrusion. When the shutter curtain is opened, even if the upper and lower aggregates are displaced in the expected direction in a situation where the guide function of the inclined surface is not exerted with the tip surface of the convex portion and the bottom surface of the concave portion separated (the upper end portion of the lower aggregate approaching the lower end portion of the upper aggregate) or in contact, the side surface of the convex portion abuts against the protrusion, so that the fitting state between the lower end portion and the upper end portion does not come off (the lower end portion of the upper aggregate does not shift and fall in the expected direction from the upper end portion of the lower aggregate). In one aspect, the height dimension of the contact portion is larger than that of the horizontal portion. In one aspect, the upper end portion of the contact portion is located above the upper surface of the horizontal portion, and the lower end portion of the contact portion is located below the lower surface of the horizontal portion. In one aspect, the sheet is composed of a first sheet forming a first finding surface and a second sheet forming a second finding surface. The first sheet is fixed to the finding surface of one contact portion of each aggregate, and the second sheet is fixed to the finding surface of the other contact portion of each aggregate. In the embodiments described later, the sheet is fixed to the finding surface of the contact portion of the aggregate with screws via a sheet pressing member. In one aspect, the aggregate is formed of an aluminum profile.

[0008] In one aspect, on the upper surface of the lower bottom, which is the lowermost aggregate of the plurality of aggregates, a protrusion is formed adjacent in the expected direction to the surface where the lower end portion of the contact portion of the aggregate above the lower bottom abuts. In one aspect, in the protrusion of the lower bottom, when the upper surface of the lower bottom and the lower end portion are in contact, the surface facing the lower end portion is composed of a vertical surface below the protrusion and an upper inclined surface located above the vertical surface and inclined in a direction away from the lower end portion. When the shutter curtain is opened, if the upper surface of the lower bottom approaches the lower end of the upper aggregate and is displaced in the prospective direction, the lower end of the aggregate is guided by the inclined surface of the protrusion of the lower bottom, so that the lower bottom and the aggregate overlap at a regular position. When the upper surface of the lower bottom and the lower end of the upper aggregate are in contact and displaced in the prospective direction, the lower end of the aggregate contacts the vertical surface of the protrusion of the lower bottom, so that the lower end of the upper aggregate does not shift and fall in the prospective direction from the upper surface of the lower bottom.

[0009] In one aspect, the shutter curtain comprises a plurality of long aggregates and a wide sheet provided on the plurality of long aggregates, and an upper portion in a folded state in which the long aggregates overlap in the height direction, and comprises a plurality of short aggregates and a narrow sheet provided on the plurality of short aggregates, and a lower portion in a folded state in which the short aggregates overlap in the height direction. In one aspect, on the upper surface of the upper bottom, which is the lowermost aggregate of the plurality of long aggregates, a protrusion is formed adjacent to the prospective direction of the surface where the lower end of the contact portion of the long aggregate above the upper bottom contacts. In one aspect, at the protrusion of the upper bottom, the surface facing the lower end when the upper surface of the upper bottom and the lower end are in contact is composed of a vertical surface below the protrusion and an upper inclined surface located above the vertical surface and inclined in a direction away from the lower end. In one aspect, on the lower surface of the upper bottom, which is the lowermost aggregate of the plurality of long aggregates, a protrusion is formed adjacent to the prospective direction of the surface where the upper end of the contact portion of the uppermost short aggregate contacts. In one aspect, at the protrusion of the upper bottom, the surface facing the upper end when the lower surface of the upper bottom and the upper end are in contact is composed of a vertical surface above the protrusion and a lower inclined surface located below the vertical surface and inclined in a direction away from the upper end. When the shutter curtain is opened, if the upper end portion of the lower short aggregate deviates in the prospective direction in a state where it approaches the lower surface of the upper bottom, the upper end portion of the short aggregate is guided by the inclined surface of the protrusion on the lower surface of the upper bottom, so that the upper bottom and the short aggregate overlap at a regular position. When there is a deviation in the prospective direction in a state where the lower surface of the upper upper bottom and the upper end portion of the lower short aggregate are in contact, the upper end portion of the short aggregate contacts the vertical surface of the protrusion on the lower surface of the upper bottom, so that the lower surface of the upper bottom does not deviate and drop from the upper end portion of the lower short aggregate in the prospective direction.

[0010] In one aspect, a shutter curtain including a plurality of aggregates and a sheet provided on the plurality of aggregates is in a folded state in which the plurality of aggregates overlap in the height direction when the opening is opened. A protrusion is formed on the upper surface of the lower bottom, which is the lowermost aggregate of the plurality of aggregates. Aggregates other than the lower bottom are composed of a horizontal portion extending in the finding direction and the prospective direction, and contact portions provided at both ends of the horizontal portion in the prospective direction. When the lower bottom and the aggregate above the lower bottom overlap, the protrusion of the lower bottom is positioned adjacent to the prospective direction of the surface where the lower end portion of the contact portion of the aggregate contacts. In one aspect, in the protrusion of the lower bottom, the surface facing the lower end portion when the upper surface and the lower end portion of the lower bottom are in contact is composed of a vertical surface below the protrusion and an upper inclined surface located above the vertical surface and inclined in a direction away from the lower end portion. In one aspect, the shutter curtain is composed of a plurality of long aggregates and a wide sheet provided on the plurality of long aggregates, and an upper portion in a folded state in which the long aggregates overlap in the height direction, and includes a lower portion composed of a plurality of short aggregates and a narrow sheet provided on the plurality of short aggregates, and in a folded state in which the short aggregates overlap in the height direction. The lowermost short aggregate of the plurality of short aggregates is the lower bottom. On the upper surface of the upper bottom, which is the lowermost long member among the plurality of long members, an upper protrusion is formed adjacent to the expected direction of the surface where the lower end of the contact portion of the long member above the upper bottom abuts. On the lower surface of the upper bottom, a lower protrusion is formed adjacent to the expected direction of the surface where the upper end of the contact portion of the uppermost short member abuts. In one aspect, in the upper protrusion of the upper bottom, the surface facing the lower end when the upper surface of the upper bottom and the lower end are in contact consists of a vertical surface below the upper protrusion and an upper inclined surface located above the vertical surface and inclined in a direction away from the lower end. In the lower protrusion of the upper bottom, the surface facing the upper end when the lower surface of the upper bottom and the upper end are in contact consists of a vertical surface above the lower protrusion and a lower inclined surface located below the vertical surface and inclined in a direction away from the upper end.

[0011] The shutter device provided with the above shutter curtain is provided with guide rails for guiding both end portions in the width direction of the shutter curtain in the height direction. Both end portions in the width direction of the members are provided with guide receiving portions guided by the guide rails. A plurality of suspension wires are connected at a plurality of positions with intervals in the width direction to the bottom member, which is the lowermost member among the plurality of members. The suspension wires can be wound and paid out by a winding device provided above the opening. When the opening is closed, the members are in an extended state separated in the height direction by paying out the suspension wires. When the opening is opened, the members are in a folded state superimposed in the height direction by winding up the suspension wires. In one aspect, the shutter curtain includes a wide upper portion and a narrow lower portion. The upper portion consists of a plurality of long members and a wide sheet provided on the plurality of long members. The lower portion consists of a plurality of short members and a narrow sheet provided on the plurality of short members. In one aspect, the expected dimensions of the upper portion and the lower portion are substantially the same. In one aspect, the cross-sectional shapes of the long member and the short member are substantially the same. In one aspect, the expected dimensions of the long member and the short member are substantially the same. In one aspect, the height dimension of the upper portion is variable by the long member taking an extended state with the long members spaced apart in the height direction and a folded state with the long members overlapping in the height direction, and the height dimension of the lower portion is variable by the short member taking an extended state with the short members spaced apart in the height direction and a folded state with the short members overlapping in the height direction. In one aspect, when the opening is opened, the uppermost short member (the overlapping short members) abuts against the lowermost long member from below, causing the lowermost long member to move upward. In one aspect, the lowermost long member of the plurality of long members consists of an upper bottom, and the lowermost short member of the plurality of short members consists of a lower bottom.

Advantages of the Invention

[0012] According to the present invention, when the shutter curtain is opened, the displacement between the members is suppressed and they are stably overlapped in an appropriate state, so that the sheet is uniformly folded and the shutter curtain can be stably opened. In addition, the generation of abnormal noise when the shutter curtain is opened is reduced, and the risk of damage to the sheet is reduced by suppressing as much as possible the action of unnecessary forces on the sheet and the fixing portions between the sheet and the members.

Brief Description of the Drawings

[0013]

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[0014] While referring to the drawings, the sheet shutter according to this embodiment will be described in detail. In this specification, the present invention will be described based on two embodiments, the first embodiment and the second embodiment. The major differences between the first embodiment and the second embodiment are 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 sizes of the opening and the shutter curtain are not limited. In this specification, the suspension wire W is a general term for wires (the first wire W1, the second wire W2, the third wire W3), the sheet 4 is a general term for sheets (the first sheet 4A, the second sheet 4B, etc.), the pulley 5 is a general term for pulleys (the first pulley 5A, the second pulley 5B, etc.), the winding device 6 is a general term for winding devices (the first winding device 6A, the second winding device 6B, etc.), the placement plate P is a general term for placement plates (placement plate P1, placement plate P2), the guide rail G is a general term for guide rails (the upper guide rail G1, the lower guide rail G2, etc.), and the beam H may be used as a general term for beams (beam H1, H2, etc.). Please note this point.

[0015] [I] First Embodiment [A] Overall Configuration While referring to FIGS. 1 to 7, the overall configuration of the sheet shutter according to the first embodiment will be described. The sheet shutter according to the first embodiment includes a shutter curtain 1 that opens and closes an opening, guide rails G that are located on both sides in the width direction of the opening and guide both end portions in the width direction of the shutter curtain 1 in the height direction, and a lifting 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 finding direction.

[0016] The opening opened and closed by the sheet shutter 1 according to the first embodiment is a rectangular opening. Above the opening, a pair of beams H1 and H2 extend in the opening width direction, and the upper end member 14 having a dish-shaped cross section extending in the opening width direction bridging the lower ends of the pair of beams H1 and H2 forms the upper end of the opening. The lower end of the opening is defined by the floor surface FL. The end portions in the width direction of the opening are defined by the left and right housings C and the left and right guide rails G fixed to the housings C.

[0017] The shutter curtain 1 includes a plurality of frame members having a predetermined projected width and extending in the opening width direction, and a sheet provided on the plurality of frame members. In the present embodiment, the plurality of frame members include a plurality of frame members 2 and a bottom member 3 located at the lowermost position. The frame members 2 and the bottom member 3 have a predetermined projected width. The sheet 4 according to the present embodiment is fixed to the first side in the projected direction of each of the frame members 2 and the bottom member 3 and forms the first finding surface of the shutter curtain 1, and the second side in the projected direction of each of the frame members 2 and the bottom member 3. It consists of two sheets, a second sheet 4B that is fixed and forms the second finding surface of the shutter curtain 1. In the fully closed state of the opening, the first sheet 4A and the second sheet 4B are separated and opposed in the projected direction. The upper ends of the first sheet 4A and the second sheet 4B are fixed to the lower surfaces of the pair of beams H1 and H2 via the upper end member 14 above the opening.

[0018] The lifting drive device includes a wire having a lower end connected to the bottom member 3, and a winding device provided above the opening and having the upper end of the wire connected thereto. The lower ends of the first wire W1 and the second wire W2 are respectively connected to both end portions in the width direction of the bottom member 3 located at the lowermost position 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.

[0019] When the opening is closed, by feeding out the first wire W1 and the second wire W2, the shutter curtain 1 is in an extended state where the aggregate 2 and the bottom member 3 are spaced apart in the height direction, and the sheets 4A and 4B face each other and extend vertically in the height direction. When the opening is opened, by winding up the first wire W1 and the second wire W2, the shutter curtain 1 is in a folded state where a plurality of aggregates 2 and the bottom member 3 are stacked in the height direction, and the first sheet 4A and the second sheet 4B are folded on the first side and the second side, respectively.

[0020] [B]Shutter Curtain The shutter curtain 1 according to the present embodiment is formed of a plurality of aggregates 2 each consisting of a long member 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 forming the first finding surface and the second finding surface of the shutter curtain 1. In the shutter curtain 1 according to the present embodiment, the aggregate 2 and the sheet pressing member 7 are formed of aluminum profiles, but they may also be made of steel, stainless steel, or the like. Among the components of the shutter curtain 1, elements other than the aggregate 2 and the sheet pressing member 7 (excluding the sliding member 26) are formed of steel or the like.

[0021] [B - 1]Aggregate As shown in FIG. 8, the aggregate 2 includes a horizontal portion 20 having a predetermined expected width and extending in the opening width direction (the finding direction), and contact portions 21, 21 provided at both ends of the horizontal portion in the expected direction and extending in the opening width direction. The height dimension of the contact portion 21 is larger than the height (thickness) of the horizontal portion 20. The upper end portion 22 of the contact portion 21 is located above the upper surface 200 of the horizontal portion 20, and the lower end portion 23 of the contact portion 21 is located below the lower surface 201 of the horizontal portion 20. The contact portions 21, 21 are provided with finding surfaces 210 that are vertical surfaces, and the first sheet 4A and the second sheet 4B are fixed in a state of being in contact with the finding surfaces 210, respectively (see FIG. 13).

[0022] When the opening is open, the aggregates 2 adjacent vertically overlap. However, in the aggregates 2 adjacent vertically, one of the lower end 23 of the contact portion 21 of the upper aggregate 2 and the upper end 22 of the contact portion 21 of the lower aggregate 2 is a concave portion and the other is a convex portion. When the opening is open, the lower end 23 of the upper aggregate 2 and the upper end 22 of the lower aggregate 2 are fitted to each other.

[0023] In the present embodiment, the upper end 22 of the aggregate 2 is a concave portion. The concave portion includes a horizontal plane 220 forming the bottom surface of the concave portion, an outer convex portion 221 located outside the horizontal plane 220 and having an inclined surface 2210, and a convex portion 222 located inside the horizontal plane 220. The lower end 23 of the aggregate 2 is a downward convex portion. The convex portion includes a horizontal plane 230 forming the lower end surface of the convex portion, an outer inclined surface 231, an inner vertical surface 232, and an inner horizontal plane 233. When the aggregates 2 adjacent vertically overlap, the concave portion of the upper end 22 of the lower aggregate 2 is fitted to the convex portion of the lower end 23 of the upper aggregate 2 (see FIG. 34).

[0024] [B-1-1] Guide receiving portion As shown in FIGS. 10 and 11, horizontal guide plates 24 are fixed to both ends in the length direction of the upper surface 200 of the horizontal portion 20 of the aggregate 2. The tip side of the guide plate 24 protrudes from the end in the length direction of the aggregate 2, and a guide receiving portion 25 is formed in the protruding portion. The guide receiving portion 25 includes a guided groove portion 250 extending in the finding direction and a wide portion 251 located on the back side of the guided groove portion 250. The guided groove portion 250 is formed by a pair of guide elements. In the present embodiment, the pair of guide elements are a pair of sliding members 26. The sliding member 26 according to the present embodiment is a resin having a predetermined strength and good slidability.

[0025] In the present embodiment, the guide plate 24 is fixed to the horizontal portion 20 at the base end side portion having a substantially square shape in plan view, and a notch portion 240 having a predetermined expected width and depth is formed in the protruding portion at the tip side. Both sides of the opening of the notch portion 240 are inclined sides 241 in plan view so as not to interfere with the lifting paths of the first wire W1 and the second wire W2.

[0026] A pair of sliding members 26 that are located at the opening of the notch portion 240 and face each other in the expected direction are provided so as to be spaced apart from each other. The opening of the notch portion 240 is narrowed by the sliding members 26, and the gap between the sliding members 26 serves as the guided groove portion 250. In the notch portion 240, the portion on the back side of the guided groove portion 250 is a widened portion 251 that is wider than the guided groove portion 250. A pair of fixing members 27 are provided at the opening of the notch portion 240, and each sliding member 26 is supported by each fixing member 27. As shown in FIG. 9, the height dimensions of the sliding members 26 and the fixing members 27 are larger than the thickness of the guide plate 24.

[0027] As shown in FIG. 9, the sliding member 26 is a substantially rectangular parallelepiped having a substantially rectangular shape in plan view, and includes a tip finding surface 260 that forms the guided groove portion 250, a base end finding surface 261, an outer expected surface 262, and an inner expected surface 263. The tip finding surface 260 that forms the guided groove portion 250 bulges gently in plan view.

[0028] The fixing member 27 is formed from a finding piece 270, an outer expected piece 271, and an inner expected piece 272, and includes a support portion having an L shape in plan view formed from the finding piece 270 and the outer expected piece 271. The sliding member 26 is detachably attached to the fixing member 27 by fastening the outer expected piece 271 with a screw S1 (FIG. 9) in a state where the finding surface 261 at the base end of the sliding member 26 abuts against the finding piece 270 and the outer expected surface 262 abuts against the outer expected piece 271. The tip finding surface 260 protrudes beyond the tip of the outer expected piece 271 to which the outer expected surface 262 is attached.

[0029] [B-2] Bottom member As shown in Fig. 14, the bottom member 3 has, as a whole, a rectangular parallelepiped shape, including a pair of upper frames 30 extending horizontally and parallel to each other in the opening width direction, a pair of lower frames 31 extending horizontally and parallel to each other 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 prospective direction, and the other upper frame 30 and the other lower frame 31 are located on the second side in the prospective direction. The bottom member 3 is provided with a plurality of reinforcing members 38 extending in an inclined shape, forming a truss structure. In this embodiment, the prospective width of the bottom member 3 is substantially the same as the prospective width of the aggregate 2.

[0030] The upper frame 30 according to this embodiment is a square pipe with a rectangular cross-sectional view, and includes a vertical side surface (finding 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.

[0031] The lower frame 31 is a square pipe with a rectangular cross-sectional view and includes a vertical side surface (finding surface) 310. The finding surface 300 of one upper frame 30 and the finding surface 310 of the lower frame 31 form the finding surface on the first side of the bottom member 3, and the finding surface 300 of the other upper frame 30 and the finding surface 310 of the lower frame 31 form the finding surface on the second side of the bottom member 3.

[0032] On the upper surface 301 of the upper frame 30, a convex portion 33 is formed adjacent to the surface where the lower end portion 23 of the upper aggregate 2 abuts, with a gap in the width direction. In this embodiment, on the upper surface 301, the convex portion 33 is provided inside the surface where the lower end portion 23 of the aggregate 2 abuts. The convex portion 33 according to this embodiment is provided in plurality with a gap in the width direction of the upper surface 301 of the bottom member 3, but it may also be a long member extending in the opening width direction.

[0033] 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), and two buffer members 34 are arranged side by side at a distance in the prospective direction. When the opening is fully closed, the buffer member 34 at the lower end of the bottom member 3 is in close contact with the floor surface FL.

[0034] As shown in FIGS. 17 to 20 and FIG. 22, the end plate 32 has a vertical and vertically long rectangular shape and forms the left and right prospective surfaces of the bottom member 3. A wire fixing portion 35 is provided in the middle of the end plate 32 in the height direction. An upper guided portion 36 is provided above the end plate 32 and is located above the wire fixing portion 35. A lower guided portion 37 is provided below the end plate 32 and is located below the wire fixing portion 35. The upper guided portion 36 and the lower guided portion 37 each include a pair of guide elements. In this embodiment, the upper guided portion 36 includes a pair of sliding members 362, and the lower guided portion 37 includes a pair of first guide rollers 370 and a pair of 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 inclination of the bottom member 3 can be suppressed.

[0035] [B―2-1] Wire fixing portion As shown in FIGS. 19, 22, and 23, the wire fixing portion 35 according to this embodiment is composed of a pair of wire fixing portions 35 arranged side by side in the prospective direction. Each wire fixing portion 35 includes a shaft portion 350 to which the lower end of the suspension wire W is attached, a support portion 351 that supports the shaft portion 350, and a base 352 that is provided in a protruding manner from the end plate 32 and to which the support portion 351 is fixed. At the upper end of the base 352, a height adjusting means 353 composed of a bolt or the like extending in the vertical direction is provided to adjust so that there is no slack in the two suspension wires W connected to the wire fixing portion 35 and to prevent the bottom member 3 from tilting when the wire fixing portion 35 is pulled upward.

[0036] [B―2-2] Upper guided portion As shown in FIGS. 18 and 22, the upper guided portion 36 is composed of an upper guide plate 361 provided with a guide receiving portion 360. The upper guide plate 361 extends horizontally from the upper end of a vertical surface portion 3610 fixed to the end plate 32, and the guide receiving portion 360 is formed on the upper guide plate 361. A notch portion 3611 is formed in the upper guide plate 361 in the same manner as the guide plate 24. A pair of sliding members 362 are provided at intervals in the prospective direction and positioned at the opening of the notch portion 3611. A guided groove portion is formed between the sliding members 362. In the notch portion 3611, the back side of the guided groove portion is a widened portion. The sliding members 362 are fixed to a pair of fixing members 363 provided at intervals in the prospective direction and positioned at the opening of the notch portion 3611. 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 length direction of the member 2. If necessary, the description of the guide receiving portion 25 can be incorporated by reference.

[0037] [B―2-3] Lower Guided Portion As shown in FIGS. 20 and 22, the lower guided portion 37 is composed of a lower guide plate 372 provided with a pair of first guide rollers 370 and a second guide roller 371 in a posture perpendicular to the first guide roller 370 in plan view. The lower guide plate 372 extends horizontally from the lower end of a vertical surface portion 3720 fixed to the end plate 32, and a notch portion 3721 is formed in the lower guide plate 372. A pair of first guide rollers 370 are spaced apart and opposed so as to sandwich the opening of the notch portion 3721 from the prospective direction. A guided groove portion narrower than the width of the opening is formed between the circumferential surfaces of the first guide rollers 370 facing each other in the prospective direction. The second guide roller 371 is provided on the vertical surface portion 3720. Further, since the pair of first guide rollers 370 and the second guide roller 371, which are the guide elements of the lower guided portion 37, are located at the lowermost position of the shutter curtain 1, they can smoothly respond to horizontal biases including the finding direction and the prospective direction of the shutter curtain 1 (sheet 4).

[0038] [B―3] Sheet and Sheet Fixing Structure The first sheet 4A and the second sheet 4B have a height dimension and a finding width dimension capable of closing the opening. The first sheet 4A and the second sheet 4B are fixed in contact with the finding surfaces of each of the plurality of ribs 2 and the bottom member 3 in a state where the plurality of ribs 2 and the bottom member 3 are positioned in parallel with a space in the height direction. The upper ends of the first sheet 4A and the second sheet 4B are fixed to the first finding surface 140 and the second finding surface 141 of the upper end member 14. One finding surface and the other finding surface of the rib 2 and the bottom member 3 are flush with the first finding surface 140 and the second finding surface 141 (see FIG. 5).

[0039] In the present embodiment, the plurality of ribs 2 and the bottom member 3 have the same expected width, and the finding surfaces 210 of the contact portions 21 of each rib 2, the finding surface 300 of the upper frame 30 of the bottom member 3, and the finding 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 finding surfaces 210, 300, and 310 with screws S2 by a sheet pressing member 7 extending in the sheet width direction in a state of being in contact with the finding surfaces 210 of each rib 2 and the finding surfaces 300 and 310 of the bottom member 3 (FIGS. 5, 10 to 13, 18 to 21).

[0040] As shown in FIG. 13, the sheet pressing member 7 includes, in a sectional view, 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 fixed with a plurality of screws S2 at intervals in the opening width direction in a state where the vertical portion 70 is overlapped with the sheet 4 from above and the sheet 4 is sandwiched between the vertical portion 70 and the finding surface in a state where the sheet 4 is in contact with the finding surfaces of the rib 2 and the bottom member 3.

[0041] As shown in FIGS. 10 to 12 and FIGS. 18 to 21, the found width dimension of the sheet 4 is larger than the found widths of the aggregate 2 and the bottom member 3, and both end portions in the width direction of the sheet 4 are provided with extending portions 42 that extend beyond both end portions in the length direction of the aggregate 2 and the bottom member 3. The edge in the width direction of the sheet 4 is represented by 4'. The length dimension of the sheet pressing member 7 is such that the end portions are longer than the length dimensions of the aggregate 2 and the bottom member 3, and both end portions in the width direction of the sheet pressing member 7 protrude beyond the width direction end portions of the aggregate 2 and the bottom member 3, forming extending portions 7'. The extending portion 42 of the sheet 4 is fixed to the extending portion 7' of the sheet pressing member 7. More specifically, the extending portion 42 of the sheet 4 is sandwiched between the back plate 73 as a fixing member and the extending portion 7' of the sheet pressing member 7 and fixed with screws S3. The shape of the fixing member is not limited, but the back plate 73 according to this embodiment is a thin disk shape.

[0042] The material of the sheet 4 according to this embodiment is not limited as long as it has a predetermined strength and flexibility, and can be formed from known sheet materials. As shown in FIG. 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 portions of the strip-shaped sheets 400 extend in the sheet height direction, the influence of the sheet self-weight on the connection portions is smaller than when a plurality of sheets are connected in the height direction (the connection portions extend horizontally).

[0043] [C] Guide mechanism The guide rail G is a member that is positioned at both ends of the opening and fixed to the housing C, and extends over substantially the entire height of the opening. As shown in FIGS. 10, 17A, 18 to 20, the guide rail G according to the present embodiment includes a first guide rail 8 that is positioned at substantially the center of the expected width of the shutter curtain 1 and extends in the finding direction, and a pair of second guide rails 9 that are positioned so as to sandwich the first guide rail 8 in plan view and extend in the finding direction. In the present embodiment, the lengths of the first guide rail 8 and the second guide rail 9 in the finding direction are the same. Both end portions in the width direction of the shutter curtain 1 are guided by the guide rail G. The first guide rail 8 is received between the guide receiving portions 25 of each frame member 2, the guide receiving portion 360 of the bottom member 3, and the pair of first guide rollers 370. Both end portions in the width direction of the first sheet 4A are positioned outside one of the second guide rails 9, and both end portions in the width direction of the second sheet 4B are positioned outside the other second guide rail 9.

[0044] [C-1] First guide rail The first guide rail 8 is positioned at substantially the center of the expected width of the shutter curtain 1, with the proximal end side fixed to the housing C and provided with a guide portion at the distal end side in the finding direction. The guide portion of the first guide rail 8 includes a first portion 80 that is positioned at substantially the center of the expected width of the shutter curtain 1 and extends in the finding direction, and a second portion 81 that extends in the finding direction at the tip of the first portion 80, and has a T shape in plan view in the present embodiment. The proximal end side of the first portion 80 is a wide portion 800, and a fixing piece 82 is formed at the proximal end of the wide portion 800. The first guide rail 8 is attached to the housing C by fixing the fixing piece 82 to the housing C with bolts.

[0045] [C-2] Second guide rail (sheet guide) The second guide rail 9 has its proximal end fixed to the housing C, and the tip-side part in the finding direction is positioned on the finding surfaces at both ends in the width direction of the shutter curtain 1, and abuts or approaches the both ends in the width direction of the sheet 4 from the inside. The second guide rail 9 includes a first finding piece 90 on the tip side, a second finding piece 91 on the proximal side positioned inside in the prospective direction with respect to the first finding piece 90, and a step part 92 positioned between the proximal end of the first finding piece 90 and the tip of the second finding piece 91. The end in the width direction of the sheet 4 abuts or approaches the outer surface of the first finding piece 90. A fixing piece 93 extending perpendicular to the second finding piece 91 is provided at the proximal end of the second finding piece 91, and the second guide rail 9 is generally L-shaped in plan view. A pair of second guide rails 9 are positioned so as to sandwich the first guide rail 8 in plan view.

[0046] [C-3] First guide mechanism The first guide mechanism including the first guide rail 8 will be described. Guide receiving parts 25 each including a guided groove part 250 extending in the finding direction and a wide part 251 positioned on the back side of the guided groove part 250 are provided at both ends in the width direction of the aggregate 2. A part of the first part 80 is positioned in the guided groove part 250 with a clearance, and the second part 81 is positioned in the wide part 251. The prospective dimension of the second part 81 is larger than the groove width of the guided groove part 250 and smaller than the prospective width of the wide part 251, and the second part 81 can be locked to the guided groove part 250 (the inner prospective surface 263 of the sliding member 26). The sliding member 26 according to the present embodiment is a resin with good slipperiness, and there is no hindrance to the opening and closing of the shutter curtain 1 even when the second part 81 is in contact with the inner prospective surface 263 of the sliding member 26.

[0047] At both ends in the width direction of the bottom member 3, a guide receiving portion 360 of the upper guided portion 36 is provided on the upper side, and a pair of first guide rollers 370 of the lower guided portion 37 is provided on the lower side. A part of the first portion 80 is positioned in the guided groove portion of the upper guide receiving portion 360 with a clearance, and the second portion 81 is positioned in the wide portion. The expected dimension of the second portion 81 is larger than the groove width of the guided groove portion and smaller than the expected width of the wide portion. The second portion 81 can be locked to the guided groove portion (the inner expected surface of the sliding member 362).

[0048] A part of the first portion 80 is positioned between the pair of first guide rollers 370 of the lower guided portion 37 with a clearance. The expected dimension of the second portion 81 is larger than the groove width between the first guide rollers 370. Also, the inner side surface of the first guide roller 370 and the second portion 81 are separated from each other and do not come into contact. The tip surface of the second portion 81 is separated and opposed to the second guide roller 371, and the second guide roller 371 can be in sliding contact with the tip surface of the second portion 81 according to the sway in the width direction of the shutter curtain 1. As shown in FIG. 22, the second guide roller 371 is positioned above the pair of first guide rollers 370.

[0049] With the second portion 81 of the first guide rail 8 on one side in the width direction of the shutter curtain 1 locked to the guided groove portion (the inner expected surface 263 of the sliding member 26, the inner expected surface of the sliding member 362), the side surface of the second portion 81 of the first guide rail 8 on the same side and the first guide roller 370 are separated from each other. Also, the tip of the second portion 81 of the first guide rail 8 on the other side in the width direction of the shutter curtain 1 and the bottom edge 2510 of the wide portion 251 of the guide receiving portion 25, the bottom edge of the wide portion of the guide receiving portion 360 are maintained in a separated state.

[0050] [C-4] Second Guide Mechanism A second guide mechanism including a second guide rail 9 will be described. Both end portions in the width direction of the first sheet 4A are extending portions 42 that extend beyond the end portions in the width direction of the aggregate 2 and the bottom member 3. The extending portion 42 includes a first portion 420 that abuts or is close to the first finding piece 90 of one second guide rail 9, and a second portion 421 that is spaced apart from and faces the second finding piece 91. The second portion 421 is fixed to the extending portion 7' using a screw S3 while being sandwiched between the back plates 73 in a state of abutting against the back surface of the extending portion 7'. The second guide rail 9 is a sheet guide, and both end portions in the width direction of the first sheet 4A are guided by the first finding piece 90 of the second guide rail 9 located on the back surface side of the first portion 420 of both end portions in the width direction of the first sheet 4A.

[0051] Both end portions in the width direction of the second sheet 4B are extending portions 42 that extend beyond the end portions in the width direction of the aggregate 2 and the bottom member 3. The extending portion 42 includes a first portion 420 that abuts or is close to the first finding piece 90 of the other second guide rail 9, and a second portion 421 that is spaced apart from and faces the second finding piece 91. The second portion 421 is fixed to the extending portion 7' using a screw S3 while being sandwiched between the back plates 73 in a state of abutting against the back surface of the extending portion 7'. The second guide rail 9 is a sheet guide, and both end portions in the width direction of the second sheet 4B are guided by the first finding piece 90 of the second guide rail 9 located on the back surface side of the first portion 420 of both end portions in the width direction of the second sheet 4B.

[0052] In each second guide rail 9, the expected dimension of the stepped portion 92 of the second guide rail 9 is larger than the protruding dimension of the back plate 73 in plan view (i.e., the thickness of the back plate 73). The back plate 73 located on the back surface of the second portion 421 at both end portions in the width direction of the sheet 4 is spaced apart from and faces the second finding piece 91 of the second guide rail 9, and the contact between the back plate 73 and the second finding piece 91 is restricted. The back plate 73 spaced apart from and facing the second finding piece 91 of the second guide rail 9 is spaced outward in the finding direction with respect to the stepped portion 92 of the second guide rail 9. Even when the second portion 81 is in contact with the inner expected surface 263 of the sliding member 26, the contact between the stepped portion 92 of the second guide rail and the back plate 73 is restricted.

[0053] [D]Lifting drive device The sheet shutter according to the present embodiment opens and closes the opening by electrically raising and lowering the shutter curtain 1 by a lifting drive device. The lifting drive device includes a suspension wire W having a lower end connected to a bottom member 3, and a winding device 6 provided above the opening and having an upper end of the suspension wire W connected thereto. By driving the winding device 6 with an electric motor M, the upper end side of the suspension wire W is wound up to move the suspension wire W upward to raise the shutter curtain 1, and the upper end side of the suspension wire W is paid out to move the suspension wire W downward to lower the shutter curtain 1.

[0054] As shown in FIG. 23, the suspension wire W according to the present embodiment is a wire set composed of two suspension wires W extending vertically opposite to the expected direction. At both ends in the width direction of the bottom member 3 located at the lowermost position of the shutter curtain 1, the lower ends of a first wire set composed of two first wires W1 and a second wire set composed of two second wires W2 are respectively connected. More specifically, the first wire W1 is fixed to each of a pair of wire fixing portions 35 provided on one end plate 32 of the bottom member 3, and the second wire W2 is fixed to each of a pair of wire fixing portions 35 provided on the other end plate 32 of the bottom member 3.

[0055] As shown in FIGS. 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 rail G (first guide rail 8, second guide rail 9), the guide plate 24, and the upper guide plate 361, and are configured not to contact the guide rail G (first guide rail 8, second guide rail 9), the guide plate 24, and the upper guide plate 361. More specifically, one of the first wires W1 and the second wires W2 of the first wire set and the second wire set extend in the space between the first guide rail 8 and one of the second guide rails 9, respectively, and the other first wires W1 and second wires W2 of the first wire set and the second wire set extend in the space between the first guide rail 8 and the other second guide rail 9, respectively. Both sides in the expected direction of the opening of the notch portion 240 of the guide plate 24 are a pair of inclined sides 241 in plan view, and are configured not to interfere with the lifting paths of the two first wires W1 and the two second wires W2. Similar inclined sides are also formed on the upper guide plate 361.

[0056] In the present embodiment, above the opening, an upper end member 14 extends in the opening width direction, and further above that, two beams H1 and H2 made of H-shaped steel extend in parallel in the opening width direction (see FIGS. 25, 26, and 27). The upper end portions of the first wire set (two first wires W1) and the second wire set (two second wires W2) that extend vertically in the height direction of the opening extend in the height direction through the notch portions 1420 formed at both ends in the length direction of the bottom surface 142 of the upper end member 14 and the space between the pair of beams H1 and H2, respectively (see FIG. 25).

[0057] Above the opening, a first pulley 5A is arranged directly above one end side in the width direction of the opening, and a second pulley 5B is arranged directly above the other end side in the width direction of the opening. On the ceiling surface above the opening, a first winding device 6A and a second winding device 6B are arranged directly above a substantially central portion in the width direction of the opening. The first pulleys 5A are arranged side by side in the prospective direction to form a first pulley set, and the second pulleys 5B are arranged side by side in the prospective direction to form a second pulley set.

[0058] As shown in FIGS. 1 to 3 and FIG. 26, two first wires W1 are wound around the respective first pulleys 5A of the first pulley set above the opening, extend toward the center of the opening, and are connected to the first winding device 6A, and can be wound by the first winding device 6A. The two first wires W1 are wound around a common winding drum 60 of the first winding device 6A. One of the first wires W1 is wound around one half portion 61 of the winding drum 60 extending in the prospective direction, and the other first wire W1 is wound around the other half portion 62.

[0059] As shown in FIGS. 1 to 3, two second wires W2 are wound around the respective second pulleys 5B of the second pulley set above the opening, extend toward the center of the opening, and are connected to the second winding device 6B, and can be wound by the second winding device 6B. The two second wires W2 are wound around a common winding drum 60 of the second winding device 6B. One of the second wires W2 is wound around one half portion 61 of the winding drum 60 extending in the prospective direction, and the other second wire W2 is wound around the other half portion 62.

[0060] A beam H3 is located inside the house and spaced apart from a pair of beams H1 and H2 that extend in parallel in the opening width direction above the opening. A plurality of mounting plates P are provided perpendicular to the beams H1, H2, and H3 so as to span the upper surfaces of the three beams H1, H2, and H3. A pulley 5 is provided on a mounting plate P1 provided above an end portion in the width direction of the opening. A winding device 6 is provided on a mounting plate P2 provided above a substantially central portion in the opening width direction.

[0061] The two first wires W1 that constitute the first wire set are wound around the common winding drum 60 of the first winding device 6A, and the two second wires W2 that constitute the second wire set are wound around the common winding drum 60 of the second winding device 6B. In the present embodiment, the attachment 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 each adjustable in the height direction. As shown in FIG. 24, the base 352 of the wire fixing portion 35 is fixedly positioned in the height direction with respect to the end plate 32 so as to be adjustable. More specifically, a long hole extending in the height direction is formed in the end plate 32, and the height position of the wire fixing portion 35 is adjusted by the height adjusting means 353 positioned above the base 352 as needed, and then fixed to the end plate 32 with a screw S4.

[0062] [E] Shutter opening and closing operation The sheet shutter according to the present embodiment is electrically opened and closed by a winding device 6 driven by a motor M. When opening the opening, by winding the first wire W1 and the second wire W2 around the winding drums 60 of the first winding device 6A and the second winding device 6B, the shutter curtain 1 rises while the plurality of frame members 2 and the bottom member 3 are stacked in the height direction, and the sheets 4A and 4B are folded outward on the first side and the second side respectively, resulting in a fully open state of the opening (see FIGS. 2, 6, and 7).

[0063] When the shutter curtain 1 rises, the upper end (upper surface 301) of the bottom member 3 abuts against the lower end portion 23 of the frame member 2, and in the frame members 2 adjacent to each other vertically, the upper end portion 22 of the lower frame member 2 abuts against the lower end portion 23 of the upper frame member 2. The upper surface 301 of the upper frame 30 of the bottom member 3 that moves upward by the upward movement of the suspension wire W abuts against the horizontal plane 230 of the lower end portion 23 of the lowermost frame member 2 to move the frame member 2 upward, and the horizontal plane 220 of the upper end portion 22 of the frame member 2 abuts against the horizontal plane 230 of the lower end portion 23 of the frame member 2 positioned above to move the frame member 2 upward.

[0064] As shown in FIG. 34, in a state where the bottom member 3 and the aggregate 2 overlap, the convex portion 33 of the upper surface 301 of the bottom member 3 is located inside the downward convex portion of the lower end portion 23 of the aggregate 2 positioned on both sides in the prospective direction. The height of the convex portion 33 according to the present embodiment is lower than the height of the downward convex portion of the lower end portion 23, and the portion spaced apart and opposed to the vertical surface 232 inside the downward convex portion is the lower vertical surface 330 and the upper inclined surface 331. When the shutter curtain 1 moves upward (when the shutter curtain 1 is pulled up), if the bottom member 3 and the upper aggregate 2 are displaced in the prospective direction in a separated state, the inclined surface 331 of either one of the convex portions 33 abuts against the corner portion of the vertical surface 232 inside the downward convex portion of either one of them and the horizontal surface 230, and the displacement is regulated. When the bottom member 3 and the upper aggregate 2 are displaced in the prospective direction in a state of being in contact with each other, the vertical surface 330 of either one of the convex portions 33 abuts against the vertical surface 232 inside the downward convex portion of either one of them, and the displacement is regulated.

[0065] As shown in FIG. 34, in a state where the aggregates 2 overlap each other, the horizontal surface 220 of the concave portion of the upper end portion 22 of the lower aggregate 2 abuts against the horizontal surface 230 of the convex portion of the lower end portion 23 of the upper aggregate 2, the inclined surface 2210 of the concave portion 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 of the lower end portion 23 of the upper aggregate 2, the vertical surface 232 inside the downward convex portion of the lower end portion 23 of the upper aggregate 2 faces the inner side surface of the inner convex portion 222 of the concave portion 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 moves upward (when the shutter curtain 1 is pulled up), if the upper and lower upper aggregates 2 are displaced in the prospective direction in a separated state, or if the upper and lower upper aggregates 2 are displaced in the prospective direction in a state of being in contact with each other, either one of the convex portions 232 abuts against either one of the inner convex portions 222, and the other inclined surface 2210 abuts against the inclined surface 231, and the displacement is regulated.

[0066] When the shutter curtain 1 ascends and reaches a predetermined upper limit position, the upper limit limit switch ULS is actuated and the electric ascent stops. In the shutter curtain 1, a contact portion 2000 formed of convex portions is provided on the upper surface 200 of the horizontal portion 20 of the uppermost aggregate 2 at intervals in the opening width direction. The upper end member 14 located above the opening is provided with a first finding surface 140, a second finding surface 141, and a portion having a U-shaped cross section when viewed in cross section from the bottom surface 142. Inside the upper end member 14, the upper limit limit switch ULS is provided at intervals in the opening width direction, and the detection lever of the upper limit limit switch ULS protrudes below the bottom surface 142 of the upper end member 14.

[0067] When the uppermost aggregate 2 ascends to the upper limit position by winding up the suspension wire W by the winding device 6, the contact portion 2000 of the uppermost aggregate 2 contacts the detection lever from below, the upper limit limit switch ULS is actuated, and the motor M that drives the winding device stops. In the fully open state of the opening, the upper limit limit switch is in the OFF state. Further, an emergency switch EMS is provided inside the upper end member 14 at intervals in the opening width direction, and the detection portion of the emergency switch EMS protrudes below 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 limit switch ULS.

[0068] When closing the opening, the first wire W1 and the second wire W2 are paid out from the winding drums 60 of the first winding device 6A and the second winding device 6B, so that the shutter curtain 1 descends while the aggregate 2 and the bottom member 3 are separated in the height direction, and the sheets 4A and 4B are in an extended state extending vertically in the height direction. When the buffer member 34 at the lower end of the bottom member 3 lands, the opening is in a fully closed state (see FIGS. 1, 4, and 5). When the shutter curtain 1 ascends, when the shutter curtain 1 reaches a predetermined upper limit position, the upper limit limit switch ULS operates and the electric ascent stops. A lower limit limit switch LLS for detecting that the shutter curtain 1 is in a fully closed posture is provided at the lower end portion of the guide rail G. In the fully closed state of the opening, the lower limit limit switch LLS is in an OFF state. A detection portion 39 that abuts against the lower limit limit switch LLS is provided at the lower end portion of the end plate 32 of the bottom member 3 (FIGS. 15 and 33).

[0069] [F] Bottom Lock Mechanism The sheet shutter according to the present embodiment includes a bottom lock mechanism for preventing the shutter curtain 1 from being lifted in the fully closed state of the opening. The bottom lock mechanism will be described with reference to FIGS. 16 and 30 to 33. The bottom lock mechanism includes a locking device 15 provided at the lower end portion of the guide rail G and locking receiving portions 16 provided at both ends in the width direction of the bottom member 3. It consists of a locking device provided at the lower end portion of the guide rail G and having a locking portion 150 that takes a non-locked posture and a locked posture. In the fully closed state of the opening, the locking portion in the locked posture locks to the locking receiving portion, thereby restricting the lifting of the shutter curtain.

[0070] In the present embodiment, the locking receiving portion 16 is located and fixed on the outdoor side in the expected direction at the lower portion below the end plate 32 of the bottom member 3, and includes a horizontal locking surface 160 and a contact portion 161 formed to rise on the locking surface 160. By positioning the locking portion (locking receiving portion 16 and locking portion 150) of the bottom lock mechanism on the outdoor side, it is effective in preventing lifting from the outside.

[0071] The locking device 15 includes a locking portion 150 that is movable between a non-locked position and a locked position. The locking portion 150 is configured to selectively assume the locked position and the non-locked position in conjunction with the rotational operation of the operating portion 151. When the locking portion 150 assumes the locked position, the 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 in the fully closed position of the opening is lifted, the locking surface 160 of the locking receiving portion 16 abuts against the lower surface of the locking portion 150 from below, restricting the upward movement of the bottom member 3.

[0072] The locking portion 150 according to the present embodiment is slidable between upper and lower guides 1500 and 1501 fixed to the housing C. The operating portion 151 is rotatable between a first position and a second position. By rotating the operating portion 151 from the first position to the second position, the locking portion 150 moves from the non-locked position to the locked position. By rotating the operating portion 151 from the second position to the first position, the locking portion 150 moves from the locked position to the non-locked position.

[0073] The operating portion 151 and the locking portion 150 are interlockingly connected via a shaft portion 152 extending in the horizontal direction and a link 153 extending generally in the vertical direction. When the operating portion 151 is in the first position, the lower end of the link 153 is pushed inward in the finding direction and the upper end of the link 153 is pulled outward in the finding direction, causing the locking portion 150 to assume the non-locked position. When the operating portion 151 is in the second position, the lower end of the link 153 moves outward in the finding direction and the upper end of the link 153 is pushed inward in the finding direction, causing the locking portion 150 to assume the locked position. As the link 153 rotates, a portion of the link 153 switches the ON / OFF of the detection switch MS.

[0074] In this embodiment, the locking receiving portion 16 is located outside the expected direction of the bottom member 3, the locking portion 150 is located outside the expected direction of the guide rail G, and the operating portion 151 is located inside the expected direction (inner finding surface) of the guide rail G. More specifically, the operating portion 151 is located outside the second finding piece 91 of the second guide rail 9 on the indoor side, and the shaft portion 152 passes through the wide portion 800 of the second guide rail 9 and the first guide rail 8 on the indoor side and is connected to a link 153 located inside the second guide rail 9 on the outdoor side. The locking portion 150 is located inside the second guide rail 9 on the outdoor side and is slidable in the finding direction along the guides 1500 and 1501.

[0075] In this embodiment, the locking portion 150 is biased by a spring 154 to be in a locked posture. When the locking portion 150 is in a non-locked posture, the spring 154 is compressed. When the locking portion 150 slides to the locking position, the front end surface of the locking portion 150 abuts against the contact portion 161 formed by rising on the locking surface 160 of the locking receiving portion 16, so that the locked posture of the locking surface 160 is positioned. The locking device 15 is provided with means for maintaining the non-locked posture of the locking portion 150. In this embodiment, by locking the locking pin 155 to the portion to be locked 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), the rotation of the shaft portion 152 is restricted. Normally, the locking pin 155 is in a locked state, and the rotation operation of the operating portion 151 is restricted.

[0076] The locking device 15 is provided with a detection switch MS for detecting that the locking device 15 is in a locked state. When the locking portion 150 is in a locked posture, that is, when the locking device 15 is in a locked state, the detection switch MS is in an OFF state. When the detection switch MS is in an OFF state, the electric opening and closing of the shutter curtain 1 is disabled.

[0077] The locking device 15 according to this embodiment operates by manual operation (rotation operation of the operation unit 151), but the locking device 15 may also be operated electrically. Specifically, on the condition that the opening is in a fully closed state (the lower limit limit switch LLS is in the OFF state), upon input of a lock signal from the control unit, the locking portion is moved from the unlocked posture to the locked posture to enter the locked state. The input of the lock signal may be transmitted by manual switch operation, or alternatively, after the lower limit limit switch LLS becomes OFF, a timer may be activated and the lock signal may be transmitted after a predetermined time. As the moving means of the locking portion, for example, a method of biasing it in the locking direction with a spring, restricting the extension of the spring in the compressed state at the unlocked position, and releasing the restriction by the lock signal, or moving the locking portion with a solenoid by the input of the lock signal may be adopted.

[0078] [II] Second Embodiment [A] Overall Configuration While referring to FIGS. 36 to 44, the overall configuration of the seat shutter according to the second embodiment will be described. The seat shutter according to the second embodiment, similar to the seat shutter according to the first embodiment, includes a shutter curtain 1' that opens and closes the opening, guide rails G that guide both end portions in the width direction of the shutter curtain 1' in the height direction, and a lifting 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 opening width direction, and the upper end of the opening is formed by an upper end member 14 having a dish-shaped cross section in the opening width direction that bridges the lower ends of the pair of beams H1 and H2. The lower end of the opening is defined by the floor surface FL. As will be apparent from the following description, the shape of the opening according to the second embodiment is different from the shape of the opening according to the first embodiment.

[0079] The shutter curtain 1' according to the second embodiment includes 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. The found width dimension of the intermediate portion 12 according to this embodiment is larger than the found width dimension of the lower portion 11 and smaller than the found width dimension of the upper portion 10. In the illustrated aspect, the narrow lower portion 11 is provided at a position closer to the first side with respect to the center in the width direction of the wide upper portion 10.

[0080] The sheet 4 according to the second embodiment includes a wide upper sheet 40 and a narrow lower sheet 41. The upper portion 10 of the shutter curtain 1' is composed of a plurality of long members extending in the opening width direction and the wide sheet 40 provided on the plurality of long members. The height dimension is variable by taking a stretched state in which the long members are spaced apart in the height direction and a folded state in which the long members are superimposed in the height direction. In the upper portion 10, the plurality of long members are composed of a plurality of members 2' and a bottom member 13 located at the lowermost position of the upper portion 10.

[0081] The lower portion 11 is composed of a plurality of short members extending in the opening width direction and the narrow sheet 41 provided on the plurality of short members. The height dimension is variable by taking a stretched state in which the short members are spaced apart in the height direction and a folded state in which the short members are superimposed in the height direction. In the lower portion 11, the plurality of short members are composed of a plurality of members 2'' and a bottom member 3' located at the lowermost position of the lower portion 11 (i.e., the shutter curtain 1').

[0082] The sheets (wide sheet 40 and narrow sheet 41) according to this embodiment are composed of a first sheet 4A' that forms a first finding surface on the first side of the shutter curtain 1', and a second sheet 4B' that forms a second finding surface on the second side of the shutter curtain 1'. In the fully closed state of the opening, the two sheets 4A' and 4B' are spaced apart and opposed in the prospective direction. The aggregates 2' and 2'' and the bottom members 3' and 13 and the upper end member 14 have a predetermined same prospective width. The first sheet 4A' is fixed to the first side in the prospective direction of the upper end member 14, the aggregate 2', the bottom member 13, the aggregate 2'', and the bottom member 3'. The second sheet 4B' is fixed to the second side in the prospective direction of the upper end member 14, the aggregate 2', the bottom member 13, the aggregate 2'', and the bottom member 3'. In the second embodiment, the wide sheet 40 and the narrow sheet 41 are formed from the common sheets 4A' and 4B'.

[0083] The bottom member 13 of the upper part 10 includes a first part 13A located directly above the aggregate 2'' of the lower part 11, a second part 13B located on the first side in the finding width direction (length direction) of the first part 13A, and a third part 13C located on the second side in the finding width direction (length direction) of the first part 13A. A first intermediate part 12A is provided below the second part 13B of the bottom member 13 of the upper part 10, and a second intermediate part 12B is provided below the third part 13C of the bottom member 13. The intermediate parts 12 (the first intermediate part 12A and the second intermediate part 12B) are located on the side of the upper part of the lower part 11. The intermediate part 12 is a panel body formed by joining a plurality of square pipes in a framework shape, and the height dimension is invariant.

[0084] The opening opened and closed by the sheet shutter 1' according to the second embodiment includes a wide upper opening, a narrow lower opening, and an intermediate opening located between the upper opening and the lower opening, 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.

[0085] Both ends in the width direction of the upper opening are defined by the upper guide rail G1, and both ends in the width direction of the lower opening are defined by the lower guide rail G2. Both ends in the width direction of the intermediate opening are defined by the intermediate side wall C1. At the lower end part of the upper opening, the parts located outside both ends in the width direction of the intermediate opening are the upper floor surface FL1. At the lower end part of the intermediate opening, the parts located outside both ends in the width direction of the lower opening are the intermediate floor surface FL2.

[0086] When the opening is closed, the wide upper part 10 of the shutter curtain 1' is located in the wide upper opening, the upper parts of the intermediate part 12 and the narrow lower part 11 are located in the intermediate opening, and the remaining parts of the lower part 11 are located in the narrow lower opening. The intermediate part 12 according to the present embodiment consists of a first intermediate part 12A and a second intermediate part 12B. The space between the first intermediate part 12A and the second intermediate part 12B corresponds to the found width dimension of the lower part 11. An intermediate guide rail G3 is provided directly above the lower guide rail G2 at the part facing the space between the first intermediate part 12A and the second intermediate part 12B.

[0087] At both ends in the width direction of the bottom member 3' located at the lowermost position 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 respectively connected. The first wire W1 extends vertically along the first side in the width direction of the lower part 11, further passes through the upper part 10 in the height direction, is wound around the first pulley set 5A above the opening, and is connected to a first winding device 6A provided above the opening. The second wire W2 extends vertically along the second side in the width direction of the lower part 11, further passes through the upper part 10 in the height direction, is wound around the second pulley set 5B above the opening, and is connected to a second winding device 6B provided above the opening.

[0088] On the second side in the length direction of the bottom member 13 of the upper part 10 (the side opposite to the first side where the lower part 11 approaches), a third wire set composed of two third wires W3 is connected. The third wire W3 is wound around a third pulley set 5C above the opening and is connected to a third winding device 6C provided above the opening. The upper end portions of the third wire set (two third wires W3) extend in the height direction through a notch 1420 formed at the end of the second side in the length direction of the bottom surface 142 of the upper end member 14 and through the space between a pair of beams H1 and H2 (see FIG. 60).

[0089] That is, the sheet shutter according to the second embodiment opens and closes the opening by electrically raising and lowering the shutter curtain 1´ by means of a lifting drive device. The lifting drive device includes 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 part 11, and 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 part 10. Above the opening, there are a first pulley set (two first pulleys 5A) around which two first wires W1 are wound, a second pulley set (two second pulleys 5B) around which two second wires W2 are wound, a third pulley set (two third pulleys 5C) around which two third wires W3 are wound, a first winding device 6A capable of winding and unwinding two first wires W1, a second winding device 6B capable of winding and unwinding two second wires W2, and a third winding device 6C capable of winding and unwinding two third wires W3.

[0090] When the opening is closed, the first winding device 6A, the second winding device 6B, and the third winding device 6C pay out the first wire W1, the second wire W2, and the third wire W3, so that the shutter curtain 1´ is in a stretched state in which the bottom member 3´, the aggregate 2´´, the bottom member 13, and the aggregate 2´ are spaced apart in the height direction, and the sheets 4A´ and 4B´ extend vertically in the height direction. In the fully closed state of the opening, the lower limit switch LLS is in the OFF state.

[0091] The sheet shutter according to the second embodiment includes a bottom lock mechanism that prevents the shutter curtain 1' from lifting in the fully closed state of the opening, similar to the sheet shutter according to the first embodiment. The bottom lock mechanism includes a locking device 15 provided at the lower end portion of the lower guide rail G2 and locking receiving portions 16 provided at both ends in the width direction of the bottom member 3'. It consists of a locking device provided at the lower end portion of the lower guide rail G2 and having a locking portion that takes a non-locking posture and a locking posture. In the fully closed state of the opening, the locking portion in the locking posture locks to the locking receiving portion, thereby restricting the lifting of the shutter curtain 1'. Regarding the details of the bottom lock mechanism, the description in the first embodiment can be incorporated by reference.

[0092] 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, so that the shutter curtain 1' has the bottom member 3', the aggregate 2'', the bottom member 13, and the aggregate 2' stacked in the height direction, and the sheets 4A' and 4B' are folded on the first side and the second side, respectively, into a folded state. When the shutter curtain 1' rises, when the shutter curtain 1' reaches a predetermined upper limit position, the upper limit limit switch ULS operates and the electric rising stops. A lower limit limit switch LLS for detecting that the shutter curtain 1' has reached the fully closed posture is provided at the lower end portion of the lower guide rail G2.

[0093] [B]Shutter curtain [B - 1]Overall shape The shutter curtain 1' according to the second embodiment includes a wide upper portion 10, a narrow lower portion 11, and an intermediate portion 12 that is located below the upper portion 10 and fixed 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. It should be noted that the description according to the first embodiment can be incorporated or referred to as needed. In the shutter curtain 1' according to this embodiment, the aggregates 2', 2'', and the sheet pressing member 7 are formed of aluminum profiles, but they may also be made of steel, stainless steel, etc. Among the components of the shutter curtain 1', the components other than the aggregates 2', 2'', and the sheet pressing member 7 (excluding the sliding member) are formed of steel or the like.

[0094] The upper portion 10 includes a plurality of long aggregates 2' extending in the opening width direction, a bottom member 13 (upper bottom) provided below the lowermost aggregate 2', and a wide sheet 40 provided on the plurality of long aggregates 2' and the bottom member 13. The uppermost aggregate 2' of the upper portion 10 is located at the upper end of the shutter curtain 1' and has a contact portion that contacts the upper limit limit switch ULS and the emergency switch EMS (see FIG. 60).

[0095] The lower portion 11 includes a plurality of short aggregates 2'' extending in the opening width direction, a bottom member 3' (lower bottom) provided below the lowermost aggregate 2'', and a narrow sheet 41 provided on the plurality of short aggregates 2'' and the bottom member 3'. The lowermost bottom member 3' of the lower portion 11 is located at the lower end of the shutter curtain 1' and has a contact portion with the lower limit limit switch LLS provided at the lower end portion of the lower guide rail G2.

[0096] The middle part 12 consists of a first middle part 12A provided at the lower end of the upper part 10, adjacent to the first side in the finding width direction of the upper part of the lower part 11, and a second middle part 12B provided at the lower end of the upper part 10, adjacent to the second side in the finding width direction of the upper part of the lower part 11. The interval between the first middle part 12A and the second middle part 12B corresponds to the finding width dimension of the lower part 11. On the opposing expected surfaces of the first middle part 12A and the second middle part 12B, an intermediate guide rail G3 is provided over the height direction to guide both end portions in the width direction of the lower part 11. Details of the configuration of the middle part 12 will be described later.

[0097] [B - 2] Aggregate The configurations of the aggregate 2' of the upper part 10 and the aggregate 2'' of the lower part 11 are the same as the configuration of the aggregate 2 according to the first embodiment, except for the length dimension. The description of the aggregate 2, including the reference numerals, can be appropriately incorporated. For example, FIG. 8 can be referred to. Specifically, the aggregates 2', 2'' include a horizontal part 20 having a predetermined expected width and extending in the opening width direction (finding direction), and contact parts 21, 21 provided at both ends in the expected direction of the horizontal part and extending in the opening width direction. The height dimension of the contact part 21 is larger than the height (thickness) of the horizontal part 20. The upper end part 22 of the contact part 21 is located above the upper surface 200 of the horizontal part 20, and the lower end part 23 of the contact part 21 is located below the lower surface 201 of the horizontal part 20. The contact parts 21, 21 are provided with finding surfaces 210 that are vertical surfaces, and the first sheet 4A' and the second sheet 4B' are fixed in a state of being in contact with the finding surfaces 210, respectively.

[0098] In this embodiment, the upper ends 22 of the aggregates 2' and 2'' are recessed portions, and each recessed portion includes a horizontal plane 220 forming the bottom surface of the recessed portion, an outer convex portion 221 located outside the horizontal plane 220 and having an inclined surface 2210, and a convex portion 222 located inside the horizontal plane 220. The lower ends 23 of the aggregates 2' and 2'' are downward convex portions, and each convex portion includes a horizontal plane 230 forming the lower end surface of the convex portion, an outer inclined surface 231, an inner vertical surface 232, and an inner horizontal plane 233. When the aggregates 2' and 2'' adjacent vertically are superimposed, the recessed portions of the upper ends 22 of the lower aggregates 2' and 2'' fit into the convex portions of the lower ends 23 of the upper aggregates 2' and 2''.

[0099] Horizontal guide plates 24 are fixed to both longitudinal ends of the upper surface 200 of the horizontal portions 20 of the aggregates 2' and 2''. The tip side of the guide plate 24 protrudes beyond the longitudinal ends of the aggregates 2' and 2'', and a guide receiving portion 25 is formed in the protruding portion. The guide receiving portion 25 includes a guided groove portion 250 extending in the finding direction and a wide portion 251 located on the back side of the guided groove portion 250. Regarding the specific configurations of the guide plate 24 and the guide receiving portion 25, the descriptions of the guide plate 24 and the guide receiving portion 25 in the first embodiment can be incorporated.

[0100] The aggregate 2' of the upper part 10 differs from the aggregate 2 according to the first embodiment in that it has insertion portions through which two first wires W1 of the first wire set and two second wires W2 of the second wire set are inserted in the height direction. As shown in FIG. 49, four openings 202 are formed in the horizontal portion 20 of each aggregate 2' at positions corresponding to the lifting paths of the two first wires W1 and the two second wires W2, and the two first wires W1 and the two second wires W2 respectively pass through the openings 202 and extend in the height direction of the upper part 10. As shown in FIG. 60, four openings 1400 are also formed in the bottom surface 142 of the upper end member 14 at positions corresponding to the lifting paths of the two first wires W1 and the two second wires W2, and the two first wires W1 and the two second wires W2 respectively pass through the openings 1400 and extend above the openings.

[0101] [B-3] Bottom member [B-3-1] Lower bottom The configuration of the bottom member 3' of the lower side 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 numerals can be appropriately incorporated. For example, FIGS. 14 to 23 can be referred to. Specifically, the bottom member 3' includes a pair of upper frames 30 extending horizontally in parallel in the opening width direction, a pair of lower frames 31 extending horizontally in parallel in the opening width direction, and vertical end plates 32 at both ends, and is generally in the shape of a rectangular parallelepiped. One upper frame 30 and the lower frame 31 are located on the first side in the prospective direction, and the other upper frame 30 and the lower frame 31 are located on the second side in the prospective direction. The bottom member 3' includes a plurality of reinforcing members 38 extending in an inclined shape and has a truss structure.

[0102] The upper frame 30 according to the present embodiment is a square pipe with a rectangular cross-section, and includes 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 square pipe with a rectangular cross-section and includes 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 visible surface on the first side of the bottom member 3', and the visible surface 300 of the other upper frame 30 and the visible surface 310 of the lower frame 31 form the visible surface on the second side of the bottom member 3'.

[0103] On the upper surface 301 of the upper frame 30, a convex portion 33 is formed adjacent to the surface where the lower end portion 23 of the upper aggregate 2'' abuts, with a gap in the width direction. In the present embodiment, on the upper surface 301, the convex portion 33 is provided inside the surface where the lower end portion 23 of the aggregate 2'' abuts. The convex portions 33 according to the present embodiment are provided in a plurality with a gap in the width direction of the upper surface 301 of the bottom member 3', but may be a long member extending in the opening width direction.

[0104] 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'), and two buffer members 34 are arranged in parallel at intervals in the prospective direction. When the opening is fully closed, the buffer member 34 at the lower end of the bottom member 3' is in close contact with the floor surface FL.

[0105] The end plate 32 is vertically long and rectangular, and forms the left and right prospective surfaces of the bottom member 3'. A wire fixing portion 35 is provided in the middle of the end plate 32 in the height direction. An upper guided portion 36 is provided above the end plate 32 and is located above the wire fixing portion 35. A lower guided portion 37 is provided below the end plate 32 and is located below the wire fixing portion 35. The upper guided portion 36 and the lower guided portion 37 each include a pair of guide elements. In this embodiment, the upper guided portion 36 includes a pair of sliding members 362, and the lower guided portion 37 includes a pair of first guide rollers 370 and a pair of second guide rollers 371.

[0106] [B―3―2] Upper bottom As shown in FIGS. 50 and 51, the bottom member 13 of the upper portion 10 is composed of a first portion 13A located directly above the aggregate 2'' of the lower portion 11, a second portion 13B located on the first side in the found width direction (length direction) of the first portion 13A, and a third portion 13C located on the second side in the found width direction (length direction) of the first portion 13A. In this embodiment, the third portion 13C is formed by connecting a plurality of short elements via the end plate 132. One end of the first portion 13A and one end of the second portion 13B are connected via a first joint portion 13D, and the other end of the first portion 13A and one end of the third portion 13C are connected via a second joint portion 13E. The first joint portion 13D is located on the lifting path of the first wire set (two first wires W1), and the second joint portion 13E is located on the lifting path of the second wire set (two second wires W2).

[0107] As shown in FIGS. 52 and 53, the bottom member 13 includes 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 part 13B and the other end of the third part 13C), and is generally rectangular parallelepiped in shape as a whole. One upper frame 130 and lower frame 131 are located on the first side in the prospective direction, and the other upper frame 130 and lower frame 131 are located on the second side in the prospective direction. The first part 13A, second part 13B, and third part 13C of the bottom member 13 are provided with a plurality of reinforcing members 139 extending in an inclined shape, forming a truss structure. In this embodiment, the found width of the first part 13A of the bottom member 13 is substantially the same as the found width of the bottom member 3'. No reinforcing member 139 is provided inside the first joint part 13D and the second joint part 13E located at both ends of the first part 13A, and a sufficient space (wire insertion part) for inserting the suspension wire W in the height direction is formed.

[0108] The upper frame 130 according to this embodiment is a square pipe with a rectangular cross-section, and includes a vertical side surface (found surface) 1300 and a horizontal upper surface 1301. The upper surfaces 1301 of the pair of upper frames 130 form the upper surface of the bottom member 13. The lower frame 131 is a square pipe with a rectangular cross-section and has a vertical side surface (found surface) 1310. The found surface 1300 of one upper frame 130 and the found surface 1310 of the lower frame 131 form the found surface on the first side of the bottom member 13, and the found surface 1300 of the other upper frame 130 and the found surface 1310 of the lower frame 131 form the found surface on the second side of the bottom member 13.

[0109] On the upper surface 1301 of the upper frame 130, convex portions 133 are formed adjacent to the surface where the lower end portions 23 of the upper girders 2' abut, with a gap in the width direction. In this embodiment, on the upper surface 1301, the convex portions 133 are provided inside the surface where the lower end portions 23 of the girders 2' abut. The convex portions 133 according to this embodiment are provided in plurality with a gap in the width direction of the upper surface 1301 of the bottom member 13, but may also be long members extending in the opening width direction.

[0110] On the lower surface 1311 of the lower frame 131, a convex portion 134 is formed at intervals in the width direction, adjacent to the surface where the upper end portion 22 of the lower aggregate 2'' abuts (see Fig. 61). In the present embodiment, on the lower surface 1311, the convex portion 134 is provided inside the surface where the upper end portion 22 of the aggregate 2'' abuts. A plurality of convex portions 134 according to the present embodiment are provided at intervals in the width direction of the lower surface 1311 of the bottom member 13, but may be a long member extending in the opening width direction.

[0111] The end plate 132 is a vertical rectangular plate and forms the left and right prospective surfaces of the bottom member 13. A wire fixing portion 135 is provided in the middle in the height direction on the end plate 132 on the second side in the length direction (the found width direction) of the bottom member 13. Upper guide portions 136 and lower guide portions 137 are provided on both end plates 132, and a guide roller 138 as an intermediate guide portion is provided in the middle in the height direction, located between the upper guide portion 136 and the lower guide portion 137. In the end plate 132 on the second side, the guide roller 138 is located between a pair of wire fixing portions 135.

[0112] The wire fixing portion 135 according to the present embodiment is composed of a pair of wire fixing portions 135 arranged side by side in the prospective direction. Each wire fixing portion 135 is adapted to have the lower end of the third wire W3 attached thereto. The wire fixing portion 135 is fixed to the end plate 132 so that its position can be adjusted in the height direction. More specifically, long holes extending in the height direction are formed in the end plate 132, and the height position of the wire fixing portion 135 can be adjusted by height adjusting means 1353 (see Fig. 53) as required. Regarding the specific configuration of the wire fixing portion 135, the description of the wire fixing portion 35 in the first embodiment can be incorporated herein.

[0113] The upper guided portion 136 and the lower guided portion 137 are the same as the configuration of 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 incorporated as necessary. Also, 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 length direction of the aggregate 2, and the description of the guide receiving portion 25 (including a pair of sliding members 26 and a pair of fixing members 27) can be incorporated as necessary. Regarding the guide roller 138, the description of the second guide roller 371 in the first embodiment can be incorporated.

[0114] [B―4] Sheet and Sheet Fixing Structure In this embodiment, the upper end member 14, the plurality of aggregates 2´, the bottom member 13, the plurality of aggregates 2´´, and the bottom member 3´ have the same expected width. The first sheet 4A´ and the second sheet 4B´ are fixed by screws S2 by a sheet pressing member 7 extending in the sheet width direction in a state of being in contact with the first finding surface 140, the second finding surface 141 of the upper end member 14, the finding surfaces 210 of the respective aggregates 2´, 2´´, the finding surfaces 300, 310 of the bottom member 3´, and the finding surfaces 1300, 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 end portions in the width direction of the sheet 4 according to the first embodiment, and for the specific configuration, the description in the first embodiment can be incorporated.

[0115] The finding width dimension of the wide sheet 40 is larger than the finding width of the aggregate 2´ and the bottom member 13, and both end portions in the width direction of the wide sheet 40 are provided with extending portions 42 that extend beyond both end portions in the length direction of the aggregate 2´ and the bottom member 13. The length dimension of the sheet pressing member 7 for fixing the wide sheet 40 is such that the ends are longer than the length dimension of the aggregate 2´ and the bottom member 13, and both end portions in the width direction of the sheet pressing member 7 protrude beyond the width direction ends of the aggregate 2´ and the bottom member 13, forming extending portions 7´. The extending portion 42 of the sheet 4 is fixed to the extending portion 7´ of the sheet pressing member 7. More specifically, the extending portion 42 of the sheet 4 is fixed by screws S3 in such a manner that it is sandwiched between a back plate 73 as a fixing member and the extending portion 7´ of the sheet pressing member 7.

[0116] The found width dimension of the narrow-width sheet 41 is larger than the found widths of the aggregate 2'' and the bottom member 3'. Both end portions in the width direction of the narrow-width sheet 41 are provided with extending portions 42 that extend beyond both end portions in the length direction of the aggregate 2'' and the bottom member 3'. The length dimension of the sheet pressing member 7 for fixing the narrow-width sheet 41 is such that the ends are longer than the length dimensions of the aggregate 2'' and the bottom member 3'. Both end portions in the width direction of the sheet pressing member 7 protrude beyond the width-direction ends of the aggregate 2'' and the bottom member 3', forming extending portions 7'. The extending portion 42 of the sheet 4 is fixed to the extending portion 7' of the sheet pressing member 7. More specifically, the extending portion 42 of the sheet 4 is sandwiched between the back plate 73 as a fixing member and the extending portion 7' of the sheet pressing member 7 and fixed with screws S3.

[0117] The material of the sheet 4 according to the present embodiment is not limited as long as it has a predetermined strength and flexibility, and can be formed from known sheet materials. As shown in FIG. 62, the sheet 4 according to the present 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 include a plurality of first strip-shaped sheets 4000, 4000' having a first height (the full height of the shutter curtain 1') composed of a wide-width sheet 40 and a narrow-width sheet 41, and a plurality of second strip-shaped sheets 4100 having a second height composed only of the wide-width sheet 40. The first strip-shaped sheet 4000' is a single sheet piece and has a corner formed at the lower end of the wide-width sheet 40 and the upper end of the narrow-width sheet 41, and the connection portions of the plurality of strip-shaped sheets are not located at the corner. Since the connection portions of the strip-shaped sheets 4000, 4100, 4000' extend in the sheet height direction, the influence of the sheet self-weight on the connection portions is smaller than when a plurality of sheets are connected in the height direction (the connection portions extend horizontally).

[0118] [B - 5] Intermediate portion Referring to FIGS. 42, 51, 54, and 55, the intermediate portion 12 will be described. A first intermediate portion 12A is provided below the second portion 13B of the bottom member 13 of the upper portion 10 of the shutter curtain 1', and a second intermediate portion 12B is provided below the third portion 13C of the bottom member 13. The intermediate portion 12 (the first intermediate portion 12A and the second intermediate portion 12B) is located on the side of the upper portion of the lower portion 11.

[0119] The intermediate portion 12 is a panel body having a predetermined height dimension, expected dimension, and finding width dimension, and the upper end portion is fixed to the lower surface of the second portion 13B of the bottom member 13 of the upper portion 10. More specifically, the intermediate portion 12 according to the present embodiment is composed of a panel body assembled from a plurality of corner pipe-shaped frames (frames extending horizontally in the finding direction, frames extending horizontally in the expected direction, and frames extending vertically) corresponding to each side of a rectangular parallelepiped. A sheet 120 is attached to the finding surface of the panel body. The sheet 120 is attached to a predetermined frame of the panel body with screws using a sheet pressing member 7. The panel body according to the present embodiment further includes a plurality of intermediate frames. An attachment piece with the lower end portion of the bottom member 13 is formed on the upper surface of the panel body. An attachment piece of the intermediate guide rail G3 is formed on the inner expected surface of the panel body.

[0120] As shown in FIG. 48A, the panel body of the intermediate portion 12 (intermediate portion 12B) includes a first finding surface (sheet 120), a second finding surface (sheet 120), an inner (first side in the finding width direction) expected surface (a pair of expected vertical frames 127, upper expected frame 126, lower expected frame 122), an outer (second side in the finding width direction) expected surface (a pair of expected vertical frames 127', upper expected frame 126', lower expected frame 122'), an upper surface (a pair of upper finding frames 125, upper expected frames 126, 126'), and a lower surface (a pair of lower finding frames 121, lower expected frames 122, 122'). An attachment piece 128 of the intermediate guide rail G3 is formed on the inner expected surface. An attachment piece 129 with the lower end portion of the bottom member 13 is formed on the upper surface.

[0121] In this embodiment, a pair of lower finding frames 121 extending horizontally in parallel in the opening width direction and a lower prospective frame 122 connecting the end portions on the intermediate guide rail G3 side of the pair of lower finding frames 121 constitute elements of a third guiding means described later. Below a predetermined portion in the width direction of the intermediate portion 12, an operating body 123 for operating the detection switch MS1 is provided. At the lower end of the intermediate portion 12, a pair of buffer pieces 124 protruding vertically downward from the lower end of the sheet 120 are provided across the width direction.

[0122] The height dimension of the intermediate portion 12 is substantially the same as the height dimension of the lower portion 11 in the telescopic state. The prospective width of the intermediate portion 12 is substantially the same as the prospective widths of the upper portion 10 and the lower portion 11, and in the fully closed state of the opening, the wide sheet 40, the narrow sheet 41, and the sheet 120 of the intermediate portion 12 are flush with each other to form a vertical plane. In this embodiment, the finding width dimension of the first intermediate portion 12A is narrow, and the finding width dimension of the second intermediate portion 12B is wide.

[0123] The first intermediate portion 12A and the second intermediate portion 12B have prospective surfaces facing each other with a gap therebetween, and an intermediate guide rail G3 is provided on each prospective surface across the height direction. As described later, the intermediate guide rail G3 is composed 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 the lower guide rail G2 and the intermediate guide rail G3 guide both ends in the width direction of the narrow lower portion 11. The height dimension of the intermediate guide rail G3 according to this embodiment is substantially the same as the height dimension of the intermediate portion 12. In the illustrated aspect, the lower end portion of the intermediate guide rail G3 protrudes slightly below the lower end of the intermediate portion 12.

[0124] In the fully closed state of the opening, the lower portion 11 is in a folded state, and the overlapping members 2´´ and the bottom member 3´ are located in the space between the intermediate guide rails G3, and the lower end (the lower end of the bottom member 3´) is at substantially the same height position as the lower end of the intermediate portion 12 (see FIG. 37).

[0125] In the state where the opening is fully closed, the first intermediate part 12A closes the first side part in the opening width direction of the intermediate opening, the second intermediate part 12B closes the second side part in the opening width direction of the intermediate opening, and the space between the first side part and the second side part of the intermediate part is closed by the upper part of the lower part 11 (see FIGS. 36, 47, and 48).

[0126] [C] Guide mechanism [C-1] First guide rail and second guide rail Both ends in the width direction of the upper part 10 of the shutter curtain 1' according to the second embodiment are guided by the left and right upper guide rails G1 provided at both ends in the width direction of the upper opening, and both ends in the width direction of the lower part 11 are guided by the left and right lower guide rails G2 provided at both ends in the width direction of the lower opening and the left and right intermediate guide rails G3 provided on the first intermediate part 12A and the second intermediate part 12B. The upper guide rail G1, the lower guide rail G2, and the intermediate guide rail G3 according to the second embodiment all consist of a first guide rail 8 located substantially at the center of the expected width of the shutter curtain 1' and extending in the finding 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 finding direction.

[0127] The first guide rail 8 is located substantially at the center of the expected width of the shutter curtain 1', the base end side is fixed to the housing C, and the guide part is provided at the tip side in the finding direction. The guide part of the first guide rail 8 includes a first part 80 located substantially at the center of the expected width of the shutter curtain 1' and extending in the finding direction, and a second part 81 extending in the finding direction at the tip of the first part 80, and has a T shape in a plan view in this embodiment. The base end side of the first part 80 is a wide part 800, and a fixing piece 82 is formed at the base end of the wide part 800. The first guide rail 8 is attached to the housing C by fixing the fixing piece 82 to the housing C with bolts.

[0128] The second guide rail 9 has its proximal end fixed to the housing C, and the distal end side portion in the finding direction is located on the finding surfaces at both ends in the width direction of the shutter curtain 1'. The second guide rail 9 is configured to abut or be close to both ends in the width direction of the sheet 4 (wide sheet 40, narrow sheet 41) from the inside. The second guide rail 9 includes a first finding piece 90 at the distal end side, a second finding piece 91 at the proximal end side located inside the first finding piece 90 in the looking-in direction, and a step portion 92 located between the proximal end of the first finding piece 90 and the distal end of the second finding piece 91. The end portion in the width direction of the sheet 4 (wide sheet 40, narrow sheet 41) abuts or is close to the outer surface of the first finding piece 90. A fixing piece 93 extending perpendicular to the second finding piece 91 is provided at the proximal end of the second finding piece 91, and the second guide rail 9 is generally L-shaped in plan view. A pair of second guide rails 9 are positioned so as to sandwich the first guide rail 8 in plan view.

[0129] The first part 80 of the first guide rail 8 is received between a pair of guide elements of the guide receiving part 25 of each of the members 2', 2'', the upper guided part 36 and the lower guided part 37 of the bottom member 3', and the upper guided part 136 and the lower guided part 137 of the bottom member 13. Both end portions in the width direction of the first sheet 4A' are located outside one of the second guide rails 9, and both end portions in the width direction of the second sheet 4B' are located outside the other second guide rail 9. Regarding the details of the first guide mechanism including the first guide rail 8 and the second guide mechanism including the second guide rail 9, the description in the first embodiment can be incorporated by reference.

[0130] [C-2] Alignment of the guide rail at the lower part The guide rails that guide both end portions in the width direction of the lower portion 11 of the shutter curtain 1' are composed 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 directly above the lower guide rail G2, which is a fixed guide rail, along with the up and down movement of the upper portion 10 and the intermediate portion 12. Therefore, when the shutter curtain 1' is closed, guide means is provided for aligning the upper end of the fixed lower guide rail G2 attached to the housing and the lower end of the movable intermediate guide rail G3 attached to the upper portion 10. In a state where 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 for guiding both end portions in the width direction of the lower portion 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 are in contact with each other to form a joint surface (see FIGS. 47, 58, and 59).

[0131] While referring to FIGS. 54 to 59, the alignment guide means will be described. In the present embodiment, the alignment guide means includes first guide means for aligning the lower end of the first guide rail 8 of the upper intermediate guide rail G3 and the upper end of the first guide rail 8 of the lower guide rail G2, second guide means for aligning the lower ends 95 of the pair of second guide rails 9 of the upper intermediate guide rail G3 and the upper ends 96 of the pair of second guide rails 9 of the lower guide rail G2, and third guide means provided on the intermediate floor surface FL2 with 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 expected direction and / or the finding direction.

[0132] The first guiding means according to the present embodiment includes a first guiding member 17 attached to the lower end of the widened portion 800 on the proximal end side of the first portion 80 of the first guiding rail 8 of the intermediate guiding rail G3, and a locked portion formed at the upper end of the widened portion 800 on the proximal end side of the first portion 80 of the first guiding rail 8 of the lower guiding rail G2. The first guiding member 17 is composed of an attachment piece 170 to the lower end of the first portion 80 of the first guiding rail 8 and a pair of inclined first guiding pieces 171 extending downward in an expanded shape from the lower end of the first portion 80 of the first guiding rail 8. When the upper intermediate guiding rail G3 descends from a position spaced upward from the upper end of the lower guiding rail G2, the first guiding piece 171 protruding downward from the lower end of the intermediate guiding rail G3 is locked to the locked portion at the upper end of the widened portion 800 of the first portion 80 of the first guiding rail 8 of the lower guiding rail G2, and positioning in the prospective direction is performed. In the present embodiment, in the fully closed state (the state where the first guiding piece 171 of the intermediate guiding rail G3 is locked to the locked portion of the lower guiding rail G2), the lower end of the first guiding rail 8 of the intermediate guiding rail G3 and the upper end of the first guiding rail 8 of the lower guiding rail G2 are separated (there is a gap). In the present embodiment, a pair of inclined surfaces 172 (locked portions) are formed at the upper end of the widened portion 800 of the first portion 80 of the first guiding rail 8 of the lower guiding rail G2 (see FIG. 56A). When the intermediate portion 12 descends when closing the opening, positioning in the prospective direction is performed while the pair of inclined first guiding pieces 171 of the first guiding member 17 are guided by the inclined surfaces 172. Since the first guiding member 17 is formed in the widened portion 800 on the proximal end side of the first portion 80 of the first guiding rail 8, it does not interfere with the guiding function of the first guiding rail 8. In the illustrated aspect, the pair of inclined first guiding pieces 171 extend linearly, but the shape of the first guiding piece 171 is not limited. For example, it may be a pair of inclined curved pieces 171' (FIG. 43A) extending downward in an expanded shape, or an inclined piece 171'' (FIG. 43A) formed by an upper inclined portion where each first guiding piece 171 is inclined at a first angle with respect to the vertical direction (acute angle with respect to the vertical plane) and a lower inclined portion where each first guiding piece 171 is inclined at a second angle with respect to the vertical direction (obtuse angle with respect to the vertical plane compared to the first angle).

[0133] The second guiding means according to this embodiment includes a second guiding member 18 attached to the lower end of the first finding piece 90 of the second guiding rail 9 of the intermediate guiding rail G3, and an upper end portion of a pocket portion 94 formed in the first finding piece 90 of the second guiding rail 9 of the lower guiding rail G2. The second guiding member 18 includes an upper fixing piece 180 fixed to the second guiding rail 9 and a lower second guiding piece 181 protruding downward from the lower end 95 of the second guiding rail 9. The tip (lower end) of the second guiding 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 finding piece 90 of the second guiding rail 9, and the fixing piece 180 of the second guiding member 18 is mounted and fixed in the pocket portion 94. When the upper intermediate guiding rail G3 descends from a position spaced upward from the upper end of the lower guiding rail G2, the second guiding piece 181 protruding downward from the lower end of the intermediate guiding rail G3 engages with a pocket portion formed on the back surface of the base end side of the first finding piece 90 of the second guiding rail 9 of the lower guiding rail G2, thereby positioning in the expected direction and the finding direction.

[0134] The third guiding means according to this embodiment includes a third guiding member 19 provided on an intermediate floor surface FL2 with which the lower end of the intermediate portion 12 abuts, and a pair of lower finding frames 121 and lower expected frames 122 of the intermediate portion 12. The third guiding member 19 includes a pair of finding surfaces 190, an expected surface 191, and an upper surface 192. An upper portion of the vertical portion of the pair of finding surfaces 190 is an inclined surface 1900 that inclines in a direction approaching each other upward, and an upper portion of the vertical portion of the expected surface 191 is an inclined surface 1910 that inclines toward the other expected surface side upward.

[0135] In this embodiment, two third guide members 19 are provided in different directions, spaced apart in the width direction, on the intermediate floor surface FL2 where the lower end of the first intermediate portion 12A abuts. The third guide member 19 closer to the intermediate guide rail G3 is oriented such that the inclined surface 1910 is located closer to the intermediate guide rail G3. Two third guide members 19 are provided in different directions, spaced apart in the width direction, on the intermediate floor surface FL2 where the lower end of the second intermediate portion 12B abuts. The third guide member 19 closer to the intermediate guide rail G3 is oriented such that the inclined surface 1910 is located closer to the intermediate guide rail G3.

[0136] 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 finding surfaces of the pair of lower finding frames 121 on the lower side, which extend horizontally and parallel in the opening width direction, are in proximity to or in sliding contact with the vertical portions of the pair of finding surfaces 190 of the third guide member 19. When the intermediate portion 12 and the intermediate guide rail G3 descend from a position spaced above the upper end of the lower guide rail G2, the inner finding surfaces of the lower finding frames 121 descend while being guided by the upper inclined surfaces 1900 of the pair of finding surfaces 190 of the third guide member 19, and positioning in the prospective direction is performed.

[0137] When the lower end of the intermediate guide rail G3 coincides with the upper end of the lower guide rail G2, the inner prospective surfaces of the lower prospective frames 122 of the first intermediate portion 12A and the second intermediate portion 12B are in proximity to or in sliding contact with the vertical portions of the prospective surface 191 of the third guide member 19. When the intermediate portion 12 and the intermediate guide rail G3 descend from a position spaced above the upper end of the lower guide rail G2, the inner prospective surfaces of the lower prospective frames 122 descend while being guided by the upper inclined surface 1910 of the prospective surface 191 of the third guide member 19, and positioning in the finding direction is performed.

[0138] 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 these orders are not limited. Further, the guide means may be any one or a combination of a plurality of the first guide means, the second guide means, and the third guide means. In the third guide means for positioning in the expected direction, the intermediate portion 12 may be positioned so as to be sandwiched from the expected direction by a pair of third guide members provided at intervals in the expected direction on the intermediate floor surface FL2.

[0139] Adjacent to the third guide member 19 provided on the intermediate floor surface FL2, a microswitch is provided. In the lower portion of the intermediate portion 12, an operating body 123 is provided such that the detection switch MS1 is turned off when the lower end of the intermediate portion 12 descends to a predetermined position while being guided in the expected direction and the finding direction. When the detection switch MS1 is in the OFF state, it can be determined that the upper portion 10 and the intermediate portion have descended to the lower end, and the positions of the lower end of the intermediate guide rail G3 and the upper end of the lower guide rail G2 coincide. In this embodiment, two third guide members are provided on the first intermediate floor surface FL2 located below the first intermediate portion 12A, and two third guide members are provided on the second intermediate floor surface FL2 located below the second intermediate portion 12B, for a total of four (see FIG. 37). However, one may be provided in a portion close to the intermediate guide rail G3 on the first intermediate floor surface FL2, and one may be provided in a portion close to the intermediate guide rail G3 on the second intermediate floor surface FL2, for a total of two. Alternatively, in the second intermediate floor surface FL2, by providing one or more third guide members 19 between the two third guide members 19 shown in FIG. 37, a total of five or more third guide members 19 may be provided.

[0140] [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, by winding the first wire W1, the second wire W2, and the third wire W3 around the winding drums 60 of the first winding device 6A, the second winding device 6B, and the third winding device 6C, the shutter curtain 1' ascends while the bottom member 3', the plurality of frame members 2'', the bottom member 13, and the plurality of frame members 2' are stacked in the height direction, and the first sheet 4A' and the second sheet 4B' are folded outward on the first side and the second side respectively, resulting in a fully open state of the opening. In this embodiment, the expected dimensions of the upper part 10 and the lower part 11 of the shutter curtain 1' are substantially the same. More specifically, the expected dimensions of the frame members 2', the bottom member 13 in the upper part 10, the frame members 2'' and the bottom member 3' in the lower part 11 are substantially the same (see FIGS. 41 and 61).

[0141] When the shutter curtain 1' ascends, the upper end (upper surface 301) of the bottom member (lower bottom) 3' abuts against the lower end portion 23 of the frame member 2'', and in the vertically adjacent frame members 2'', the upper end portion 22 of the lower frame member 2'' abuts against the lower end portion 23 of the upper frame member 2''. The upper surface 301 of the upper frame 30 of the bottom member 3' that ascends due to the upward movement of the suspension wire W abuts against the horizontal plane 230 of the lower end portion 23 of the lowermost frame member 2'', causing the frame member 2'' to move upward, and the horizontal plane 220 of the upper end portion 22 of the frame member 2'' abuts against the horizontal plane 230 of the lower end portion 23 of the frame member 2'' located above, causing the frame member 2'' to move upward.

[0142] The upper end 22 of the uppermost aggregate 2'' of the lower part 11 that moves upward abuts against the lower surface 1311 of the bottom member (upper bottom) 13 at the lower end of the upper part 10. The upper end (upper surface 1301) of the bottom member (upper bottom) 13 abuts against the lower end 23 of the aggregate 2'. In the vertically adjacent aggregates 2', the upper end 22 of the lower aggregate 2' abuts against the lower end 23 of the upper aggregate 2'. When the upper surface 1301 of the upper frame 130 of the bottom member 13 that moves upward due to the upward movement of the suspension wire W abuts against the horizontal plane 230 of the lower end 23 of the lowermost aggregate 2' to move the aggregate 2' upward, the horizontal plane 220 of the upper end 22 of the aggregate 2' abuts against the horizontal plane 230 of the lower end 23 of the aggregate 2' located above to move the aggregate 2' upward.

[0143] In a state where the bottom member 3' and the directly above aggregate 2'' overlap, the convex portion 33 of the upper surface 301 of the bottom member 3 is located inside the downward convex portions of the lower ends 23 of the aggregates 2'' located on both sides in the prospective direction. The height of the convex portion 33 according to the present embodiment is lower than the height of the downward convex portion of the lower end 23, and the portions facing away from the vertical plane 232 inside the downward convex portion are the lower vertical plane 330 and the upper inclined plane 331 (refer to FIG. 34). When the shutter curtain 1' moves upward (when the shutter curtain 1' is pulled up), if the bottom member 3' and the upper aggregate 2'' are displaced in the prospective direction in a separated state, the inclined plane 331 of either one of the convex portions 33 abuts against the corner portion of the vertical plane 232 inside the downward convex portion of either one and the horizontal plane 230 so that the displacement is restricted. When the bottom member 3' and the upper aggregate 2'' are displaced in the prospective direction in a contacting state, the vertical plane 330 of either one of the convex portions 33 abuts against the vertical plane 232 inside the downward convex portion of either one so that the displacement is restricted.

[0144] In a state where the aggregates 2'' of the lower part 11 overlap each other, the horizontal plane 220 of the concave part of the upper end part 22 of the lower aggregate 2'' abuts on the horizontal plane 230 of the convex part of the lower end part 23 of the upper aggregate 2'', and the inclined plane 2210 of the concave part of the upper end part 22 of the lower aggregate 2'' approaches or abuts on the inclined plane 231 of the convex part of the lower end part 23 of the upper aggregate 2''. The vertical plane 232 inside the downward convex part of the lower end part 23 of the upper aggregate 2'' faces the inner side surface of the convex part 222 inside the concave part of the upper end part 22 of the lower aggregate 2'', and the upper end of the convex part 222 faces the inner horizontal plane 233. When the shutter curtain 1 moves upward (when the shutter curtain 1' is pulled up), if there is a deviation in the prospective direction in a state where the upper aggregates 2'' above and below are separated, or if there is a deviation in the prospective direction in a state where the upper aggregates 2'' above and below are in contact with each other, the vertical plane 232 of either one of the convex parts abuts on either one of the inner convex parts 222, and the other inclined plane 2210 abuts on the inclined plane 231 so that the deviation is regulated.

[0145] In a state where the bottom member 13 and the aggregate 2'' directly below overlap each other, the upper ends of the inner convex part 222 and the outer convex part 221 inside the upper end part 22 of the aggregate 2'' abut on the lower surface 1311 of the bottom member 13, and the convex part 134 of the lower surface 1311 of the bottom member 13 is located opposite the inner convex parts 222 of the upper end parts 22 of the aggregates 2'' located on both sides in the prospective direction. The convex part 134 according to the present embodiment is provided on the lower surface 1311 of the bottom member 13 on the side away from the finding surface 1310, and the side surface located on the finding surface 1310 side is formed by the upper vertical plane 1340 and the lower inclined plane 1341 that inclines in a direction away from the finding surface 1310 from the lower end of the vertical plane 1340. When the shutter curtain 1' moves upward (when the shutter curtain 1' is pulled up), if there is a deviation in the prospective direction in a state where the bottom member 13 and the lower aggregate 2'' are separated, the upper end of either one of the inner convex parts 222 abuts on the inclined plane 1341 of either one of the convex parts 134, and the deviation is regulated. When there is a deviation in the prospective direction in a state where the bottom member 13' and the upper aggregate 2'' are in contact with each other, the vertical plane 1340 of either one of the convex parts 134 abuts on the finding surface of either one of the inner convex parts 222 so that the deviation is regulated.

[0146] In a state where the bottom member 13 and the upper adjacent aggregate 2' overlap, the convex portion 133 on the upper surface 1301 of the bottom member 13 is located inside the downward convex portion of the lower end portion 23 of the aggregate 2' positioned on both sides in the prospective direction. The height of the convex portion 133 according to the present embodiment is lower than the height of the downward convex portion of the lower end portion 23, and the portion facing away from the vertical surface 232 inside the downward convex portion is 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 aggregate 2' are displaced in the prospective direction in a separated state, the inclined surface 1331 of either one of the convex portions 133 contacts the corner between the vertical surface 232 inside the downward convex portion of either one and the horizontal surface 230, and the displacement is regulated. When the bottom member 13 and the upper aggregate 2' are displaced in the prospective direction in a contacting state, the vertical surface 1330 of either one of the convex portions 133 contacts the vertical surface 232 inside the downward convex portion of either one, and the displacement is regulated.

[0147] In a state where the aggregates 2' of the lower portion 11 overlap each other, the horizontal surface 220 of the concave portion of the upper end portion 22 of the lower aggregate 2' contacts the horizontal surface 230 of the convex portion of the lower end portion 23 of the upper aggregate 2', the inclined surface 2210 of the concave portion of the upper end portion 22 of the lower aggregate 2' is close to or contacts the inclined surface 231 of the convex portion of the lower end portion 23 of the upper aggregate 2', the vertical surface 232 inside the downward convex portion of the lower end portion 23 of the upper aggregate 2' faces the inner side surface of the inner convex portion 222 of the concave portion 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' moves upward (when the shutter curtain 1' is pulled up), if the upper aggregates 2' above and below are displaced in the prospective direction in a separated state, and also if the upper aggregates 2' above and below are displaced in the prospective direction in a contacting state, the vertical surface 232 of either one of the convex portions contacts the inner convex portion 222 of either one, and the other inclined surface 2210 contacts the inclined surface 231, and the displacement is regulated.

[0148] When the opening is fully closed, the upper part 10 in the extended state closes the upper opening, the lower part 11 in the extended state closes the lower opening, and the upper part of the first intermediate part 12A, the second intermediate part 12B and the lower part 11 in the extended state closes the intermediate opening. Both end portions in the width direction of the upper part 10 are guided by the upper guide rail G1 provided on the housing, and both end portions in the width direction of the lower part 11 are guided by the lower guide rail G2 provided on the housing and the intermediate guide rail G3 provided on the first intermediate part 12A and the second intermediate part 12B.

[0149] In the state where the opening is fully closed, the portions of the lower end of the upper part 10 located outside the first intermediate part 12A and the second intermediate part 12B are separated from the upper floor surface FL1 and do not buffer against the rail R provided on the upper floor surface FL1. A buffer material is not provided at such a portion of the lower end of the upper part 10, but a buffer material may be provided so as to avoid the rail R.

[0150] The lower end of the first intermediate part 12A abuts on the intermediate floor surface FL2 via the buffer piece 124, and the prospective surface outside the first intermediate part 12A and the intermediate side wall C1 are spaced apart and opposed. The lower end of the second intermediate part 12B abuts on the intermediate floor surface FL2 via the buffer piece 124, and the prospective surface outside the second intermediate part 12B and the intermediate side wall C1 are spaced apart and opposed. Guide rails are not provided at both end portions in the width direction of the intermediate opening. Explanation of reference numerals

[0151] 1 Shutter curtain (First embodiment) 1´ Shutter curtain (Second embodiment) 10 Upper part (Second embodiment) 11 Lower part (Second embodiment) 12 Intermediate part (Second embodiment) 121 Lower finding frame (Third guide means, first guided part) 122 Lower prospective frame (Third guide means, second guided part) 124 Buffer piece (Buffer material) 2 Aggregate (First embodiment) 2´ Aggregate (Second embodiment, long aggregate) 2´´ Aggregate (Second embodiment, short aggregate) 20 Horizontal part 202 Opening (wire insertion part) 220 Horizontal plane (bottom surface) 21 Contact part 22 Upper end part 222 Protrusion (projecting part) 23 Lower end part 230 Horizontal plane (tip surface) 26 Sliding member 260 Finding surface at the tip (inner finding surface) 261 Finding surface at the base end (outer finding surface) 3 Bottom member (first embodiment) 3´ Bottom member (second embodiment, lower bottom) 33 Protrusion (projecting part) 34 Buffer member (buffer material) 36 Upper guided part 362 Sliding member 37 Lower guided part 13 Bottom member (second embodiment, upper bottom) 13D First joint part (internal space is wire insertion part) 13E Second joint part (internal space is wire insertion part) 133 Protrusion (projecting part) 134 Protrusion (projecting part) 136 Upper guided part 137 Lower guided part 4 Sheet 40 Wide sheet (second embodiment) 41 Narrow sheet (second embodiment) 42 Extension part (extension 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 Take-up device 6A First take-up device 6B Second Take-up Device 6C Third Take-up Device (Second Embodiment) 7 Sheet Pressing Member 7´ Extension Portion (Extension Piece) 73 Back Plate (Fixed 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 Portion 81 Second Portion 9 Second Guide Rail 94 Pocket Portion (Second Guide Means, Insertion Portion) 14 Upper End Member 1400 Opening (Upper End Wire Insertion Port) 1420 Notch Portion (Upper End Wire Insertion Port) 15 Locking Device 155 Locking Pin (Holding Means) 16 Locking Receiver 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 (Suspension Wire for Lower Bottom) W2 Second Wire (Suspension Wire for Lower Bottom) W3 Third Wire (Second Embodiment) (Suspension Wire for Upper Bottom)

Claims

1. A shutter curtain including a plurality of aggregates and a sheet provided on the plurality of aggregates, when the opening is opened, the plurality of aggregates are in a folded state where they overlap in the height direction, The aggregate consists of a horizontal portion extending in the finding direction and the prospecting direction, and abutting portions provided at both ends of the horizontal portion in the prospecting direction, In the aggregates adjacent to each other vertically, one of the lower end portion of the abutting portion of the upper aggregate and the upper end portion of the abutting portion of the lower aggregate is a concave portion and the other is a convex portion. When the aggregates overlap, the lower end portion and the upper end portion are fitted together. Shutter curtain.

2. Either one of the lower end portion and the upper end portion is a convex portion provided with an inclined surface, and the other is a concave portion provided with an inclined surface, The tip surface of the convex portion abuts on the bottom surface of the concave portion, and the inclined surfaces abut or are close to each other. The shutter curtain according to Claim 1.

3. A protrusion protrudes on the side opposite to the inclined surface in the concave portion, The tip surface of the convex portion abuts on the bottom surface between the inclined surface and the protrusion. The shutter curtain according to Claim 2.

4. The height dimension of the abutting portion is larger than that of the horizontal portion. The shutter curtain according to any one of Claims 1 to 3.

5. The upper end portion of the abutting portion is located above the upper surface of the horizontal portion, and the lower end portion of the abutting portion is located below the lower surface of the horizontal portion. The shutter curtain according to any one of Claims 1 to 4.

6. On the upper surface of the lower bottom, which is the lowermost aggregate of the plurality of aggregates, a protrusion is formed adjacent to the surface where the lower end portion of the abutting portion of the aggregate above the lower bottom abuts in the prospecting direction. The shutter curtain according to any one of Claims 1 to 5.

7. In the protrusion of the lower bottom, the surface facing the lower end portion when the upper surface of the lower bottom and the lower end portion abut consists of a vertical surface below the protrusion and an upper inclined surface located above the vertical surface and inclined in a direction away from the lower end portion. The shutter curtain according to Claim 6.

8. The shutter curtain is Composed of a plurality of long aggregates and a wide sheet provided on the plurality of long aggregates, an upper portion in a folded state where the long aggregates overlap in the height direction, Composed of a plurality of short aggregates and a narrow sheet provided on the plurality of short aggregates, and includes a lower portion in a folded state where the short aggregates overlap in the height direction. The shutter curtain according to any one of claims 1 to 7.

9. On the upper surface of the upper bottom, which is the lowermost member of the plurality of long members, a protrusion is formed adjacent to the expected direction of the surface where the lower end of the contact portion of the long member above the upper bottom abuts. The shutter curtain according to claim 8.

10. In the protrusion of the upper bottom, the surface facing the lower end when the upper surface of the upper bottom and the lower end are in contact consists of a vertical surface below the protrusion and an upper inclined surface located above the vertical surface and inclined in a direction away from the lower end. The shutter curtain according to claim 9.

11. On the lower surface of the upper bottom, which is the lowermost member of the plurality of long members, a protrusion is formed adjacent to the expected direction of the surface where the upper end of the contact portion of the uppermost short member abuts. The shutter curtain according to any one of claims 9 and 10.

12. In the protrusion of the upper bottom, the surface facing the upper end when the lower surface of the upper bottom and the upper end are in contact consists of a vertical surface above the protrusion and a lower inclined surface located below the vertical surface and inclined in a direction away from the upper end. The shutter curtain according to claim 11.

13. A shutter curtain including a plurality of members and a sheet provided on the plurality of members is in a folded state in which the plurality of members are stacked in the height direction when the opening is opened. On the upper surface of the lower bottom, which is the lowermost member of the plurality of members, a protrusion is formed. The members other than the lower bottom consist of a horizontal portion extending in the finding direction and the expected direction and contact portions provided at both ends of the horizontal portion in the expected direction. When the lower bottom and the member above the lower bottom are stacked, the protrusion of the lower bottom is positioned adjacent to the expected direction of the surface where the lower end of the contact portion of the member abuts. Shutter curtain.

14. In the protrusion of the lower bottom, the surface facing the lower end when the upper surface of the lower bottom and the lower end are in contact consists of a vertical surface below the protrusion and an upper inclined surface located above the vertical surface and inclined in a direction away from the lower end. The shutter curtain according to claim 13.

15. The shutter curtain is It consists of a plurality of long members and a wide sheet provided on the plurality of long members, and has an upper part in a folded state where the long members are stacked in the height direction, It consists of a plurality of short members and a narrow sheet provided on the plurality of short members, and includes a lower part in a folded state where the short members are stacked in the height direction, The lowermost short member among the plurality of short members is the lower bottom, On the upper surface of the upper bottom which is the lowermost long member among the plurality of long members, an upper protrusion is formed adjacent to the expected direction of the surface where the lower end of the contact portion of the long member above the upper bottom abuts, On the lower surface of the upper bottom, a lower protrusion is formed adjacent to the expected direction of the surface where the upper end of the contact portion of the uppermost short member abuts, The shutter curtain according to any one of claims 13 and 14.

16. In the upper protrusion of the upper bottom, the surface facing the lower end when the upper surface of the upper bottom and the lower end are in contact consists of a vertical surface below the upper protrusion and an upper inclined surface located above the vertical surface and inclined in a direction away from the lower end, In the lower protrusion of the upper bottom, the surface facing the upper end when the lower surface of the upper bottom and the upper end are in contact consists of a vertical surface above the lower protrusion and a lower inclined surface located below the vertical surface and inclined in a direction away from the upper end, The shutter curtain according to claim 15.

Images