Airtight shutter structure

Abstract

To provide an airtight structure of a shutter applicable to a waterproof shutter.SOLUTION: A shutter includes: a shutter curtain 1 constituted by a plurality of panels 2, 3; and left and right guide bodies 5 for receiving end parts in the width direction of the shutter curtain 1. At least at one of a lower end portion of an upper side panel and an upper end portion of a lower side panel adjacent to each other vertically, air-tight members 15, 17, 18 are provided for closing a gap between the lower end portion of the upper side panel and the upper end portion of the lower side panel across the panel width direction, at the time of shutter curtain fully closed posture. At least both end portions in the width direction of the airtight member become end part airtight portions 17 for forming a portion of an outdoor side face surface of the shutter curtain 1. At an outdoor side portion of the guide body 5, a smoke shielding material 56 coming into contact with the outdoor side face surface of the shutter curtain 1 in a fully closed posture is provided across the height direction of the guide body.SELECTED DRAWING: Figure 34

Description

[Technical Field]

[0001] The present invention relates to an airtight structure for a shutter, and more particularly to a waterproof shutter with an airtight function. [Background technology]

[0002] In recent years, sudden heavy rainfall caused by abnormal weather has become more frequent, resulting in flooding of subway stations and building basements in urban areas. In emergencies, it may be necessary to install water barriers at entrances to buildings to prevent water from entering the building. Furthermore, there are also cases where it is necessary to close building openings in a watertight state to prevent water from entering the building, regardless of whether the event is a sudden heavy rainfall or not.

[0003] As exemplified in Patent Document 1, a waterproof shutter has been proposed that closes a building opening in a watertight state. There are cases where it is desired for such a waterproof shutter to also function as a fire and smoke shutter. For example, when a waterproof shutter is used as a panel shutter for both management and normal opening and closing of a building opening, it may be desired for the shutter to have fire and smoke protection capabilities even when the opening is normally fully closed.

[0004] In order to provide a shutter curtain with smoke-proof performance, it is necessary to form an airtight structure when the shutter curtain is in the fully closed position. Conventional waterproof panel shutters such as those disclosed in Patent Document 1 form a watertight structure from the floor to a specified height when the opening is fully closed, but do not have the technical idea of ​​forming an airtight structure over the entire gap between the shutter curtain and the opening when the opening is fully closed. [Patent Document 1] Patent Publication No. 2015-175155 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] An object of the present invention is to provide an airtight structure for a shutter that is particularly applicable to a waterproof shutter. [Means for solving the problem]

[0006] The technical means adopted by the present invention are: A shutter curtain made up of multiple panels, Left and right guide bodies that receive the width direction ends of the shutter curtain; In a shutter equipped with At least one of the lower end portion of the upper panel and the upper end portion of the lower panel of the adjacent panels is provided with an airtight member that closes the gap between the lower end portion of the upper panel and the upper end portion of the lower panel across the panel width when the shutter curtain is in a fully closed position, At least both widthwise end portions of the airtight member are airtight end portions that form the exterior facing surface of the shutter curtain, A smoke blocking material is provided in the outdoor side portion of the guide body along the height direction of the guide body, the smoke blocking material contacting the outdoor side visible surface of the shutter curtain in the fully closed position. The shutter's airtight structure. In one embodiment, the shutter is a waterproof shutter, and when the shutter curtain is in a fully closed position, a watertight structure is formed at the indoor side portions of the lower end portion of the upper panel and the upper end portion of the lower panel.

[0007] In one embodiment, a protrusion is provided on one of the outdoor side of the lower end portion of the upper panel and the outdoor side of the upper end portion of the lower panel, and a stepped surface on which the protrusion is located when the door is in a fully closed position is provided on the other side. The airtight member has end airtight portions provided at both widthwise ends of the stepped facing surface, and the end airtight portions form part of the outdoor facing surface of the shutter curtain. In one embodiment, the protruding piece does not extend to both widthwise ends of the step-finding surface.

[0008] In one embodiment, one of the lower end portion of the upper panel and the upper end portion of the lower panel is a convex portion, and the other is a concave portion; The airtight member has a portion that is pressed between the convex portion and the concave portion when the shutter curtain is in the fully closed position. In one embodiment, the airtight member is provided in the recessed portion, The end airtight portions are provided at both widthwise end portions of the stepped surface formed in the recessed portion.

[0009] In one embodiment, the airtight member is a continuous airtight member that extends across the entire width of the panel from a first airtight member that extends in the panel width direction and a second airtight member that forms the end airtight portion. In one embodiment, both longitudinal end portions of the first airtight member (15) and the left and right second airtight members (17) form a continuous airtight member via the left and right third airtight members (18). In one embodiment, the first airtight member is located at a substantially central portion in the projection direction of the panel and extends in the width direction of the panel.

[0010] In one embodiment, the bottom panel of the shutter curtain comprises a panel body and a seat plate provided at the lower end of the panel body, At least one of the panel body and the seat plate is provided with an elastic airtight member (16α) extending in the panel width direction, the elastic airtight member being located on the outdoor side of the opposing portion of the lower surface of the panel body and the seat plate, When the shutter curtain is in a fully closed position, the elastic airtight member closes the gap between the opposing portions, The outdoor portion of the seat plate and the elastic airtight member form a part of the outdoor facing surface of the shutter curtain, The lower end of the smoke blocking material is in contact with the outdoor side portion of the seat panel and the elastic airtight member.

[0011] In one embodiment, a lower end airtight member (19) is provided on the outdoor side of the seat plate at the lower end of the shutter curtain, which seals the gap between the underside of the seat plate and the floor surface across the panel width direction when the shutter curtain is in a fully closed position. The outdoor portion of the seat plate and both widthwise end portions (191) of the lower end airtight member form the outdoor facing surface of the shutter curtain, The lower end of the smoke blocking material reaches the floor surface and contacts the outdoor side portion of the seat plate and both widthwise end portions (191) of the lower end airtight member.

[0012] In one embodiment, an upper smoke barrier is provided on the outdoor side above the opening, contacting the upper end of the outdoor facing surface of the shutter curtain over its entire width, The smoke shielding material is in contact with both widthwise end portions of the upper smoke shielding material. [Effects of the Invention]

[0013] In the present invention, the gap between the upper and lower panels of a shutter curtain in a fully closed position, and the gap between the lower end of the shutter curtain and the floor surface are blocked across the width of the panel by an airtight member extending in the width direction of the panel, and an airtight structure is formed by having both widthwise ends of the outdoor facing surface of the shutter curtain in a fully closed position come into contact with the smoke-blocking material. Such an airtight structure can be advantageously applied to a waterproof shutter in which a water stop line is formed in the indoor portion. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a front view of the waterproof shutter (fully closed position) according to the present embodiment as seen from the indoor side. [Figure 2] 1 is a vertical cross-sectional view of a waterproof shutter according to this embodiment, with the left side being the outdoor side and the right side being the indoor side. [Figure 3] This is a front view of the shutter curtain of the waterproof shutter of this embodiment as seen from the indoor side, and a diagram showing the vertical compression mechanism above the shutter curtain. [Figure 4] This is a diagram showing a longitudinal cross-section of the shutter curtain of the waterproof shutter of this embodiment and the vertical compression mechanism, where the left figure shows the state before the shutter curtain is in the fully closed position, the center figure shows the shutter curtain in the fully closed position (non-vertical compression state), and the right figure shows the shutter curtain in the fully closed position (vertical compression state). [Figure 5]34A is a cross-sectional view of the end portion in the opening width direction of the panel shutter in the fully closed position (non-horizontal compression state), and is a partially enlarged view of the upper part of FIG. [Figure 6] 29A is a cross-sectional view of the end portion in the opening width direction of the panel shutter in the fully closed position (horizontally pressed state), and is a partially enlarged view of the upper part of FIG. 29. [Figure 7] This is a partial vertical cross-sectional view of a panel shutter in a fully closed position (vertical compression state / horizontal compression state). [Figure 8] 1A and 1B are a top view and a front view of a top panel according to the present embodiment, respectively, as viewed from the indoor side. [Figure 9] FIG. 9 is a partially enlarged view of the top view of FIG. 8. [Figure 10] FIG. 1 is a vertical cross-sectional view (viewed from direction A) of a top panel according to this embodiment, with the left side being the outdoor side and the right side being the indoor side. [Figure 10A] FIG. 2 is a side view of the top panel according to the present embodiment, with the left side being the indoor side and the right side being the outdoor side. [Figure 11] 1A and 1B are a top view and a front view, seen from the indoor side, of a panel (intermediate panel) according to the present embodiment. [Figure 11A] FIG. 2 is a front view of the panel (intermediate panel) according to the present embodiment, showing the spaces partitioned within the panel. [Figure 12] FIG. 12 is a partially enlarged view of the top view of FIG. [Figure 13] FIG. 1 is a vertical cross-sectional view (viewed from direction B) of a panel (intermediate panel) according to this embodiment, with the left side being the outdoor side and the right side being the indoor side. [Figure 14] 1A and 1B are a front view and a bottom view of a panel (intermediate panel) according to the present embodiment, as viewed from the outdoor side. [Figure 15] FIG. 1 is a side view of a panel (intermediate panel) according to this embodiment, with the left side facing the indoor side and the right side facing the outdoor side. [Figure 16] FIG. 2 is a front view of the bottom panel according to the embodiment, as viewed from the indoor side. [Figure 17] FIG. 1 is a vertical cross-sectional view (viewed from direction C) of a bottom panel according to this embodiment, with the left side being the outdoor side and the right side being the indoor side. [Figure 17A]FIG. 2 is a side view of the bottom panel according to the present embodiment, with the left side facing indoors and the right side facing outdoors. [Figure 18] 1 shows the lower end portion of the bottom panel (movable seat plate) according to this embodiment, with the upper figure being a front view and the lower figure being a bottom view. [Figure 19] This is an enlarged view of a portion of the center diagram of Figure 4, showing the state in which the lower end portion of the upper panel and the upper end portion of the lower panel fit together in the fully closed position and non-vertical compression state. [Figure 20] This is an enlarged view of a portion of the right side of Figure 4, showing the state in which the lower end portion of the upper panel and the upper end portion of the lower panel fit together in the fully closed position and vertical compression state. [Figure 21] The left image shows the upper and lower panels descending in a vertical position, the center image shows the upper panel displaced indoors relative to the lower panel as it descends, and the right image shows the upper panel displaced outdoors relative to the lower panel as it descends. [Figure 22] This is an enlarged view of a portion of the left side of FIG. 4, showing the lower end portion of the bottom panel before implantation. [Figure 23] FIG. 5 is a partially enlarged view of the center diagram of FIG. 4, showing the lower end portion of the bottom panel at the time of landing (non-vertical compression state). [Figure 24] FIG. [Figure 25] 4 is a diagram showing a state in which an elastic water-stopping member is fitted into a groove in an indoor-side portion of a panel (a partially enlarged view of the indoor-side portion in the left diagram of FIG. 4). FIG. [Figure 26] 21 is a partially enlarged view of the indoor side portion in FIG. 20, illustrating a state in which the elastic water-stopping member fitted in the groove is vertically compressed in the fully closed position. FIG. [Figure 27] 23 is a diagram showing a state in which the elastic water-stopping member is fitted into a groove in the indoor side portion of the base plate (in a non-pressing state), and is a partially enlarged view of the indoor side portion in FIG. 22. FIG. [Figure 28] This shows the state in which the elastic water-stopping member fitted into the groove is vertically compressed in the fully closed position (a partially enlarged view of the outdoor side in the right diagram of Figure 4). [Figure 29]This is a cross-sectional view of the panel shutter of this embodiment in a fully closed position (horizontal compression state), where the upper figure is a cross-sectional view of the intermediate panel or bottom panel, the middle figure is a cross-sectional view of the movable seat plate portion of the bottom panel, and the lower figure is a bottom view of the seat plate. [Figure 30] 10 is a diagram showing the positional relationship between an elastic water-stopping member and a watertight rubber member provided across the width of the indoor side of the shutter curtain. FIG. [Figure 31] 10 is a vertical cross-sectional view of a lower portion including a bottom panel in a fully closed position (vertical compression state / horizontal compression state) of the panel shutter according to the present embodiment. FIG. [Figure 32] 23 is a partially enlarged view of FIG. 22, showing the relay cable of the cord reel (the cover for storing the relay cable is not shown). [Figure 33] 10 is a partially enlarged view showing the cord pull-out portion of the cord reel on the indoor facing surface of the bottom panel. FIG. [Figure 34] This is a cross-sectional view of the panel shutter of this embodiment in a fully closed position (non-horizontal compression state), where the upper figure is a cross-sectional view of the intermediate panel or top panel, the middle figure is a cross-sectional view of the movable seat plate portion of the bottom panel, and the lower figure is a view of the bottom of the seat plate. [Figure 35] 10A and 10B are longitudinal cross-sectional views of the shutter curtain in a fully closed position (non-vertical compression state), the left figure being a longitudinal cross-sectional view of the middle part of the panel in the width direction, and the right figure being a longitudinal cross-sectional view of the end part of the panel in the width direction. [Figure 36] This is an enlarged view of a portion of the right side of Figure 35. [Figure 37] 10 is a diagram showing the positional relationship between the airtight member provided across the width of the outdoor portion of the shutter curtain and the smoke-blocking material provided on the guide body. FIG. [Figure 38] 10A and 10B are diagrams showing another embodiment of the airtight structure when the shutter curtain is in a fully closed position. [Figure 39] 10A and 10B are diagrams showing still another embodiment of the airtight structure when the shutter curtain is in the fully closed position. [Figure 40] FIG. 10 is a block diagram showing the operation flow of the waterproof shutter according to the present embodiment in the event of a fire. DETAILED DESCRIPTION OF THE INVENTION

[0015] [A] Panel shutter configuration The waterproof shutter according to this embodiment is a panel shutter and has the basic structure of a panel shutter. As shown in FIGS. 1 to 4 , the shutter curtain 1 of the waterproof shutter according to this embodiment is composed of a top panel 2 (sometimes referred to as “panel 2”), multiple middle panels 3 (hereinafter referred to as “panels 3”), and a bottom panel 4 (sometimes referred to as “panel 4”) connected in the panel height direction. It should be noted that the term “panel” used in this specification basically includes the top panel 2, panel 3, and bottom panel 4. In this embodiment, the bottom panel 4 is composed of a bottom panel main body 4′ (sometimes referred to as “panel main body 4′” or “main body 4′”) and a movable seat plate 6 (sometimes referred to as “seat plate 6”). The waterproof shutter according to this embodiment is fireproof and smokeproof in addition to waterproofing. Each of the panels 2, 3, and 4 is a steel panel made of steel, which has excellent heat and fire resistance, which differs from conventional aluminum panels. The detailed configuration of each panel 2, 3, 4, and the waterproof structure and fireproof and smokeproof structures of the waterproof shutter according to this embodiment will be described in detail later. Please note that in this specification, the terms "outdoor side" and "indoor side" are used to indicate the relative positions of parts of components in addition to indicating the positions of the "outdoor side" and "indoor side" on either side of the opening that is opened and closed by the shutter curtain 1.

[0016] The basic structure of a panel shutter will now be described. A support shaft 10 equipped with a guide roller 11 protrudes from both widthwise ends of each of the panels 2, 3, and 4 that make up the shutter curtain 1 (see Figures 5 and 6), and each of the panels 2, 3, and 4 is connected to and suspended by a chain (not shown) via the support shaft 10 to form the shutter curtain 1. The structure of suspending multiple panels by a chain in a panel shutter is well known to those skilled in the art, so a detailed explanation will be omitted.

[0017] Left and right guide bodies 5 are erected at both widthwise ends of the building opening, and are designed to receive and guide both widthwise ends of the shutter curtain 1 in a vertical position. As shown in Figures 5 and 6, the guide body 5 is a structure formed in a U-shape in cross section from a first outdoor side wall 50, a second indoor side wall 51, and a bottom wall 52 that face each other at a distance, and extends in the height direction of the opening. The distal ends of the first outdoor side wall 50 and the second indoor side wall 51 are formed with an outdoor-side bent piece 500 and an indoor-side bent piece 510 facing each other, and the widthwise ends of the shutter curtain 1 (top panel 2, panel 3, bottom panel 4) are received in the opening groove between the distal ends of the outdoor-side bent piece 500 and the indoor-side bent piece 510. The bottom wall 52 of the guide body 5 is provided with a guide member 53, which is a long member extending perpendicular to the height direction and contacts and guides the outdoor-side peripheral surface of the guide roller 11. Long fins 54 (made of, for example, nylon) extending in the height direction are formed on the outside of the outdoor-side bent piece 500 and the indoor-side bent piece 510 at the tip sides of the outdoor-side first side wall 50 and the indoor-side second side wall 51. The upper end of the guide member 53 extends into the storage space above the opening and is equipped with an upper extension 5' (see Figure 2), which is configured to be able to contact the guide roller 11 from both the outdoor side and the indoor side.

[0018] In the storage space above the opening, a sprocket 12 for winding a chain is provided at approximately the upper end of the upper extension 5', and the opening / closing device M rotates the sprocket 12 to lift or unwind the chain, thereby raising or lowering the shutter curtain 1 and opening or closing the building opening. The storage space for the shutter curtain 1 above the opening extends from above the opening toward the indoor side, and this storage space is provided with a storage rail 13 that extends at a gentle downward angle from the front (outdoor side) to the rear (indoor side). When the chain is lifted, the panels 2 and 3 are transferred to the storage rail 13 via the sprocket 12, and the guide rollers 11 are guided by the storage rail 13 and sent sequentially to the rear of the storage space, so that the panels 2, 3, and 4 are held hanging down parallel to each other and stored.

[0019] The panel shutter according to this embodiment is an electric panel shutter, and the electric opening and closing of the shutter curtain 1 is performed by operating an opening / closing switch (not shown) in the switch boxes SB1 to 3. When the opening switch (not shown) is pressed in the fully closed state and the opening / closing device M rotates the sprocket 12 in the chain lifting direction, the shutter curtain 1, which is in a vertical position in the fully closed state, rises as the chain rises, with both widthwise ends guided by the vertical guide body 5, and is sequentially transferred from the top panel 2 to the storage rails 13 extending laterally from the upper extension 5' of the guide body 5, and is stored in parallel in the storage space, opening the opening.

[0020] When the opening is fully open, pressing the closing switch (not shown) causes the opening / closing device M to rotate the sprocket 12 in the chain payout direction. The panels 2 and 3, which have been stored in parallel, are guided by the storage rails 13 along the guide rollers 11 at both ends of the width, and are successively pulled out from the rear (indoor side) of the storage space to the front (outdoor side) of the sprocket 12. As they pass the sprocket 12, they assume a vertical position above and below each other in the height direction, and are guided by the guide body 5 as they descend, closing the opening.

[0021] When the shutter curtain 1 descends, the upper end of the lower panel and the lower end of the upper panel of any two adjacent panels (top panel 2 and panel 3, panels 3 together, or panel 3 and bottom panel 4) are spaced apart (see the left diagram in Figure 4 and the left diagram in Figure 21). When the shutter curtain descends, after the lower end of the bottom panel 4 hits the floor, the shutter curtain 1 continues to descend a predetermined distance, so that the upper end of the lower panel and the lower end of the upper panel of any two adjacent panels come into at least partial contact, resulting in a fully closed state (see the center diagram in Figure 4 and Figure 19).

[0022] The bottom panel 4 of the shutter curtain 1 according to this embodiment is made up of a bottom panel main body 4' and a movable seat plate 6 provided at the lower end of the bottom panel main body 4', and the movable seat plate 6 and a detection switch SW provided at the lower end of the bottom panel main body 4' constitute a first obstacle detection means. When the movable seat plate 6 at the lower end of the bottom panel 4 lands on the floor or abuts against an obstacle and moves relatively upward by a predetermined amount, the detection switch SW turns ON, an obstacle detection signal is sent to the control unit of the opening / closing machine M via the cord reel CR (wired type), and the shutter curtain 1 stops moving while it is descending. The control unit has preset upper and lower limits for the shutter curtain 1, and if an obstacle detection signal is received above the lower limit, it determines that an obstacle has been detected while the shutter curtain is descending, and the descending shutter curtain 1 is controlled to stop for 1 second, for example, and then reverse and rise for 1.5 seconds, and if an obstacle detection signal is received below the lower limit, it determines that the shutter curtain is in a fully closed position (has landed on the floor FL), and stops the descent of the shutter curtain 1 without reversing and rising. Furthermore, the transmission of the obstacle detection signal is not limited to a wired system, but may be a wireless system (for example, transmitted wirelessly by radio waves).

[0023] Photoelectric sensors 14, which are exemplified as second obstacle detection means, are provided below the opening at a predetermined height from the floor. In the illustrated embodiment, four photoelectric sensors 14 are provided on the outdoor and indoor sides, at heights of 150 mm and 500 mm from the floor. The height positions of the photoelectric sensors 14 are merely examples, and the height positions are not limited. In this embodiment, if an obstacle is detected while the shutter curtain is descending, the descending shutter curtain stops for, for example, one second, and then reverses and rises for 1.5 seconds.

[0024] The basic structure of the panel shutter has been described with reference to the drawings, but the basic structure of the panel shutter is well known to those skilled in the art, and further detailed description will be omitted. Furthermore, many variations and improvements to the panel shutter are known to those skilled in the art, and it should be noted that the structure of the panel shutter that can be applied to the waterproof shutter according to the present invention is not limited to the embodiment shown in the drawings.

[0025] [B] Waterproof shutter configuration The panel shutter according to this embodiment functions as a waterproof shutter by providing a water-stopping structure to the shutter curtain 1 when it is fully closed. In this embodiment, the means for making the panel shutter in a fully closed state water-stopping is comprised of a vertical compression mechanism 7 that compresses the shutter curtain 1 vertically downward when it is fully closed, and a horizontal compression mechanism 8 that compresses the shutter curtain 1, which has been compressed vertically by the vertical compression mechanism 7, horizontally toward the indoor side as a whole. The configurations and operations of the vertical compression mechanism 7 and horizontal compression mechanism 8 are described below, but reference can be made to Patent Document 1 for further details on the configuration of the waterproof shutter.

[0026] [B-1] Vertical compression mechanism As shown in Fig. 1, a plurality of vertical compression mechanisms 7 are provided in the storage space above the opening across the width of the opening. As shown in Figs. 3 and 4, the vertical compression mechanism 7 includes a power cylinder 70, which is an example of an actuator arranged in the storage space above the opening, and a pressing portion (consisting of a link mechanism) 72, which is provided at the tip of a piston rod 71 of the power cylinder 70 and abuts against and presses the upper end of the uppermost panel 2 in the fully closed state. When the opening is in the fully closed state, the piston rod 71 is lowered, causing the pressing portion 72 to abut against and press downward against the upper end of the uppermost top panel 2, thereby compressing the shutter curtain 1 in the fully closed state vertically downward.

[0027] When the shutter curtain 1 is in a fully closed state, it is placed in a vertically compressed state, so that an elastic water-stopping member (in this embodiment, elastic water-stopping member 16) extending over the entire width of the panels is pressed against the lower end of the upper panel and the upper end of the lower panel of two adjacent panels (panels 2 and 3, panels 3 and 3, and panels 3 and 4) vertically, forming a water-stopping structure. An elastic water-stopping member (in this embodiment, indoor-side elastic water-stopping member 16β) extending over the entire width of the panels is pressed against the panel main body 4' of the bottom panel 4 and the movable seat plate 6, forming a water-stopping structure. An elastic water-stopping member (in this embodiment, elastic water-stopping member 19) extending over the entire width of the panels is pressed against the movable seat plate 6 and the floor surface FL, forming a water-stopping structure.

[0028] 2, the vertical compression mechanism 7 is positioned toward the outside with respect to the elevation path of each panel so as not to interfere with the elevation of each panel in the storage space above the opening. Therefore, to press the upper end of the top panel 2, which is the uppermost panel in the fully closed state, the piston rod 71 of the power cylinder 70 protrudes diagonally downward, but a pressing force acts vertically on the upper end of the top panel 2 by a pressing part 72 made up of a link mechanism.

[0029] 1 and 3, in this embodiment, three vertical compression mechanisms 7 are provided at intervals in the opening width direction. More specifically, one vertical compression mechanism 7 is provided in the center of the opening width direction, and vertical compression mechanisms 7 are provided at positions closer to the left and right guide bodies 5, with the distance between the central vertical compression mechanism 7 and the left vertical compression mechanism 7 being the same as the distance between the central vertical compression mechanism 7 and the right vertical compression mechanism 7. The number of vertical compression mechanisms 7 is not limited, and an appropriate number is selected depending on the width dimension (opening width dimension) of the shutter curtain 1 (panels 2, 3, 4), etc.

[0030] The vertical compression mechanism 7 according to this embodiment is equipped with a first limit switch and a second limit switch. When the vertical compression mechanism 7 is in an inactive state, a movable portion of the vertical compression mechanism 7 is in contact with the first limit switch, and the second limit switch is in a non-contact state. When the vertical compression mechanism 7 is activated and the piston rod 71 extends to a predetermined compression position, the first limit switch is in a non-contact state, and a movable portion is in contact with the second limit switch. The first limit switch and the second limit switch constitute a vertical compression state detection means. Specifically, when the first limit switch is ON (the second limit switch is OFF), the non-vertical compression state is detected; when the first limit switch is OFF and the second limit switch is OFF, the vertical compression operation or vertical compression release operation is in progress; and when the second limit switch is ON (the first limit switch is OFF), the vertical compression state is detected. In this embodiment, when the first limit switch is turned from OFF to ON, the vertical compression mechanism 7 releases compression, and when the second limit switch is turned from OFF to ON, the vertical compression mechanism 7 completes compression.

[0031] [B-2] Horizontal compression mechanism As shown in FIG. 1, horizontal compression mechanisms 8 are provided in the storage space above the opening, at the left and right ends of the opening width. Like the vertical compression mechanism 7, the horizontal compression mechanism 8 is provided offset toward the exterior with respect to the elevation path of the panels 2, 3, and 4 so as not to interfere with the elevation of the panels 2, 3, and 4 in the storage space above the opening. As shown in FIG. 1, the horizontal compression mechanism 8 includes a power cylinder 80, which is an example of an actuator disposed in the storage space above the opening, and a horizontal pressing member 82 (see FIGS. 5 and 6 ) that operates in conjunction with the up and down movement of a piston rod 81 of the power cylinder 80. The horizontal pressing member 82 of the horizontal compression mechanism 8 is a long member that has a rectangular cross section and extends in the height direction. The horizontal pressing member 82 is provided on the inner surface of the distal end of the first side wall 50 on the outdoor side of the guide body 5. A watertight rubber member 55, which is a long member extending in the height direction, is provided on the inner surface of the distal end of the second side wall 51 on the indoor side. The horizontal compression mechanism 8 presses both widthwise ends of the indoor side of the shutter curtain 1 in the fully closed position (vertical compression state) against the watertight rubber member 55, thereby forming a water-stopping structure in the height direction at both widthwise ends of the shutter curtain 1 in the fully closed position.

[0032] 5 and 6, the horizontal pressing member 82 extends in the indoor-outdoor direction along the outdoor-side bent piece 500 in a plan view, and includes a first member (outdoor-side member) 820 that is elongated and U-shaped in cross section and extends vertically along the guide body 5, a second member (indoor-side member) 821 that is elongated and U-shaped in cross section and extends vertically along the guide body 5, and an operating rod 822. The operating rod 822 is an elongated member that extends vertically along the guide body 5, and the upper end side of the operating rod 822 is connected to the tip of the piston rod 81 of the power cylinder 80, and an operating mechanism is configured by the operating rod 822 and the power cylinder 80 (including the piston rod 81) that moves the operating rod 822 up and down. In this embodiment, the operating rod 822 is configured to be pulled up in conjunction with the downward protruding movement of the piston rod 81, and the second member 821 moves horizontally toward the indoor side in conjunction with the upward movement of the operating rod 822, pressing the outdoor side portion of the shutter curtain 1 with the pressing surface 8210 and pressing the indoor side portion against the watertight rubber member 55.

[0033] The horizontal compression mechanism 8 according to this embodiment is equipped with a first limit switch and a second limit switch. When the horizontal compression mechanism 8 is in an inactive state, a movable portion of the horizontal compression mechanism 8 is in contact with the first limit switch, and the second limit switch is in a non-contact state. When the horizontal compression mechanism is activated and the piston rod 81 extends to a predetermined compression position, the first limit switch is in a non-contact state, and a movable portion is in contact with the second limit switch. The first limit switch and the second limit switch constitute a horizontal compression state detection means. Specifically, when the first limit switch is ON (the second limit switch is OFF), a non-horizontal compression state is detected; when the first limit switch is OFF and the second limit switch is OFF, a horizontal compression operation or a horizontal compression release operation is in progress; and when the second limit switch is ON (the first limit switch is OFF), a horizontal compression state is detected. In this embodiment, when the first limit switch changes from OFF to ON, the horizontal compression mechanism 8 releases compression, and when the second limit switch changes from OFF to ON, the horizontal compression mechanism 8 completes compression.

[0034] [B-3] Middle pillar As shown in Figures 1 and 2, in this embodiment, the waterproof shutter is equipped with a movable center post 9. The center post 9 is located on the indoor side of the shutter curtain 1 when it is in a fully closed state, and is installed so as to closely face the indoor side of the shutter curtain 1. The center post 9 is designed to resist water pressure acting from the outdoor side to the indoor side of the shutter curtain 1 when it is in a fully closed position. In one aspect, the center post 9 is installed by moving the shutter curtain 1 in a fully closed position to a watertight state (compressing in the vertical and horizontal directions), and then moving the center post 9 from the stored position to the installed position and installing it so as to closely face the indoor side of the shutter curtain 1.

[0035] [B-4] Waterproof shutter operation control device The waterproof shutter according to this embodiment can be used as a so-called management panel shutter, and is used for the normal opening and closing of building openings, and also functions as a waterproof shutter in emergencies such as when heavy rain is expected. The operation of the electric waterproof shutter according to this embodiment is controlled by input from the operating unit.

[0036] As shown in Figure 2, the waterproof shutter according to this embodiment has three operating units: a first outdoor switch box SB1, a second outdoor switch box SB2, and an indoor switch box SB3. The first outdoor switch box SB1 and the indoor switch box SB3 are located at a height of 1500 mm from the floor to make them easy to operate when the operator is standing. The second outdoor switch box SB2 is located at a height of more than 3000 mm (the expected maximum water level WL) from the floor. The above height positions are merely examples and are not limiting.

[0037] The operation panel inside the switch box is equipped with an open button, close button, stop button, compression button, compression release button, and emergency close button. The operation of the waterproof shutter is controlled based on input from these buttons. More specifically, in accordance with instructions from button input, the operation of the opening / closing mechanism M (raising and lowering of the shutter curtain 1), vertical compression mechanism 7 (vertical compression and vertical compression release of the shutter curtain 1 in the fully closed state), and horizontal compression mechanism 8 (horizontal compression and horizontal compression release of the shutter curtain 1 in the vertical compression state) is controlled via the control unit. Each button will be explained below.

[0038] The waterproof shutter of this embodiment is equipped with a fully closed state detection means (for example, consisting of a lower limit switch or a seat switch) that detects when the shutter curtain 1 has reached the fully closed opening state, a vertical compression state detection means (first limit switch, second limit switch) that detects when the shutter curtain 1 has reached the vertical compression state, and a horizontal compression state detection means (first limit switch, second limit switch) that detects when the shutter curtain 1 has reached the horizontal compression state.

[0039] When the shutter is in the pressure release state (vertical pressure release state and horizontal pressure release state) and is not in the fully open position, pressing the open button will cause the shutter curtain 1 to rise and stop in the fully open position. When the shutter is not in the fully closed position, pressing the close button will cause the shutter curtain to fall and stop in the fully closed position. If the stop button is pressed while the shutter is operating, or during compression or pressure release, the operating shutter curtain 1 will stop operating at any position.

[0040] When the shutter is not in the fully closed position and not in a compressed state (vertical compression state and horizontal compression state), pressing the compression button will start the compression operation to achieve a watertight structure. When the pressing operation of the vertical compression mechanism 7 is completed (when the second limit switch of the vertical compression mechanism 7 turns ON, a vertical compression state signal is generated), the horizontal compression mechanism 8 will start its pressing operation, and the shutter curtain 1, which has been compressed in the vertical direction, will be pressed together toward the indoor side. When the shutter is not in the fully closed position, pressing the emergency close button will cause the shutter curtain to be lowered by a push-through operation.

[0041] When the shutter is in a compressed state, or when it is in the fully closed position and not in a compressed state, pressing the compression release button starts the compression release operation. One procedure is that when the compression release button is pressed, first the horizontal compression mechanism 8 starts its release operation, and once the release operation of the horizontal compression mechanism 8 is complete (when the first limit switch turns ON, a horizontal compression state release signal is generated), the vertical compression mechanism 7 starts its release operation. Once the compression release operation of the vertical compression mechanism 7 is complete, the first limit switch of the vertical compression mechanism 7 turns ON and a vertical compression state release signal is generated. If the horizontal compression state has been released, the release operation starts from the vertical compression state.

[0042] In one embodiment, in addition to operation input from the first outdoor switch box SB1, the second outdoor switch box SB2, and the indoor switch box SB3, remote operation input from a control room or the like (operation while checking safety with a surveillance camera, etc.) is possible. A series of shutter operations can be controlled by remote control signals, and pressure and pressure release operations can also be performed remotely.

[0043] [C] Shutter curtain configuration As shown in Figures 1 to 4, the shutter curtain 1 of the waterproof shutter according to this embodiment is composed of a top panel 2, multiple panels 3, and a bottom panel 4 connected in the panel height direction. When the shutter curtain 1 is raised or lowered or in the fully closed position, the top panel 2, multiple panels 3, and bottom panel 4 are in a vertical position. The explanation of each part of the top panel 2, multiple panels 3, and bottom panel 4 (specifically, vertical, hanging, horizontal, etc.) will be made mainly based on the vertical position of the panels.

[0044] [C-1] Top panel [C-1-1] Outline of the top panel The configuration of the top panel 2 will be described with reference to Figures 8 to 10. The top panel 2 is a roughly horizontally rectangular plate-like body that extends in the opening width direction and has a predetermined width, height, and thickness (projected dimensions), and is composed of an outdoor facing surface 20, an indoor facing surface 21, an upper surface 22, a lower surface 23, and side surfaces 24 on both ends in the width direction. As shown in Figure 8, the top panel 2 has the same width dimension throughout.

[0045] 10, the lower end portion of the outdoor-side sight surface 20 of the top panel 2 is formed as a step recessed toward the indoor-side sight surface 21. Specifically, the outdoor-side sight surface 20 is composed of a main surface portion 200 and a step formed below the main surface portion 200, and the step is formed from a lower edge portion 201 at the lower end of the main surface portion 200 and a lower outdoor-side sight surface (stepped sight surface) 202 that is displaced and hangs down toward the indoor-side sight surface 21 relative to the vertically oriented main surface portion 200. The upper ends of the outdoor-side sight surface 20 and the indoor-side sight surface 21 are at approximately the same height, and the lower end of the indoor-side sight surface 21 extends downward beyond the lower end of the outdoor-side sight surface 20 (including the lower outdoor-side sight surface 202).

[0046] 8, the upper surface portion 22 of the top panel 2 is composed of a horizontal upper surface 220 and a plurality of recesses 221 formed at intervals in the width direction of the panel, and each recess 221 is formed in a U-shape in front view by opposing vertical surfaces 222, 222 and a bottom surface 223. The bottom surface 223 of the recess 221 is formed from a thick pressure plate.

[0047] When viewed from the side, the underside portion 23 of the top panel 2 is formed of an outdoor-side underside 230, an outdoor-side inclined surface 231 extending from the indoor-side portion of the outdoor-side underside 230 toward the indoor side and upward, a central horizontal plane 232 extending horizontally from the indoor-side portion of the outdoor-side inclined surface 231 toward the indoor side, an indoor-side inclined surface 233 extending from the indoor-side portion of the central horizontal plane 232 toward the indoor side and downward, an indoor-side vertical surface 234 hanging down from the indoor-side portion of the indoor-side inclined surface 233, and an indoor-side underside 235 extending horizontally toward the indoor side from the lower end of the indoor-side vertical surface 234.

[0048] As shown in Figure 10, a buffer / airtight member 15 is provided on the lower surface 23 of the top panel 2, but the configuration of the lower end portion of the top panel 2 (including the lower outdoor facing surface 202, the lower surface 23, and the buffer / airtight member 15) is substantially the same as the configuration of the lower end portion of the panel 3, and for details of the configuration of the lower end portion of the top panel 2, please refer to the configuration of the lower end portion of the panel 3 described below.

[0049] [C-1-2] Surface material of top panel The top panel 2 is assembled from multiple steel plates formed into a predetermined shape. In this embodiment, the main surface 200 of the outdoor-facing visible surface 20 of the top panel 2 is formed from a first surface material, and folded pieces are integrally formed at the upper and lower ends of the first surface material, with the upper folded piece forming the outdoor-facing edge of the top surface 22 and the lower folded piece forming the lower edge 201.

[0050] The indoor facing surface 21 of the top panel 2 is formed from a second surface material, and folded pieces are integrally formed at the upper and lower ends of the second surface material, with the folded piece at the upper end forming the upper surface 220 of the upper surface portion 22 and the folded piece at the lower end forming the indoor facing lower surface 235 of the lower surface portion 23.

[0051] The lower outdoor facing surface 202 of the outdoor facing surface 20 and the outdoor portion of the underside 23 are made of a third surface material that has been bent into a predetermined shape, and the indoor portion of the underside 23 is made of a fourth surface material that has been bent into a predetermined shape, with portions of the third surface material and the fourth surface material overlapping to form a central horizontal plane 232, and portions of the fourth surface material and the folded piece at the lower end of the second surface material overlapping to form an indoor underside 235.

[0052] The side surface portion 24 is formed from a surface portion having a shape that follows the cross-sectional shape of the top panel 2, and a fifth surface member consisting of a pair of facing pieces, which are respectively abutted and connected (welded) to the inner surfaces of the outdoor facing surface 20 and the indoor facing surface 21. The upper end of the fifth surface member that forms the side surface portion 24 abuts against the upper surface 200 of the upper surface portion 22, and the lower end abuts at least partially against the lower surface portion 23. A hole portion 240 is formed in the side surface portion 24 so as to straddle the horizontal surface 250 of the intermediate horizontal reinforcement member 25, and a gap 241 and an opening 242 are formed in the lower portion as drainage openings (see FIG. 10A).

[0053] Each vertical surface 222 of the recess 221 on the upper surface portion 22 of the top panel 2 is made up of a projection piece that forms the vertical surface 222 and a sixth surface material that is L-shaped in cross section from the indoor side projection piece, with the outdoor side edge of the projection piece abutting against the inner surface of the outdoor side projection surface 20, and the indoor side projection piece abutting and connected (welded) to the inner surface of the indoor side projection surface 21. As described above, the bottom surface 223 of the recess 221 is formed from a thick pressure plate.

[0054] Although the first to sixth surface materials formed into predetermined shapes have been described, these are merely examples, and the shape, number, assembly structure, etc. of the surface materials (plate materials) that form the surface of the top panel 2 are not limited.

[0055] [C-1-3] Horizontal reinforcement for top panel A plurality of horizontal reinforcement members extending across the entire width are provided inside the top panel 2. Note that a plurality of horizontal reinforcement members that are shorter than the entire width of the top panel 2 may be connected in the opening width direction. As shown in Figures 8 and 10, in this embodiment, the top panel 2 has three horizontal reinforcement members: an upper horizontal reinforcement member 25', a middle horizontal reinforcement member 25, and a lower horizontal reinforcement member 26.

[0056] In cross section, the upper horizontal reinforcement 25' has a U-shape consisting of a horizontal surface 250', an outdoor-side hanging piece 251', and an indoor-side hanging piece 252'. The horizontal surface 250' has a projected dimension equivalent to the distance between the inner surfaces of the first surface member forming the main surface 200 of the outdoor facing surface 20 and the second surface member forming the indoor facing surface 21, and the outdoor-side hanging piece 251' and the indoor-side hanging piece 252' are abutted and connected (welded) to the inner surfaces of the first surface member and the second surface member, respectively. Both longitudinal ends of the upper horizontal reinforcement 25' are connected (welded) to the facing piece of the fifth surface member forming the side surface 24. A pressing plate forming the bottom 223 of the recess 221 is supported on the horizontal surface 250' of the upper horizontal reinforcement 25'.

[0057] In cross section, the intermediate horizontal reinforcement 25 has a U-shape consisting of a horizontal surface 250, an outdoor-side hanging piece 251, and an indoor-side hanging piece 252. Note that the U-shape may be formed from rising pieces instead of the outdoor-side hanging piece 251 and the indoor-side hanging piece 252. The horizontal surface 250 has a projection dimension equivalent to the distance between the inner surfaces of the first surface member forming the main surface 200 of the outdoor-side facing surface 20 and the second surface member forming the indoor-side facing surface 21. The outdoor-side hanging piece 251 and the indoor-side hanging piece 252 are respectively abutted and connected (welded) to the inner surfaces of the first surface member and the second surface member. Both longitudinal ends of the upper horizontal reinforcement 25 are connected (welded) to the facing piece of the fifth surface member forming the side surface 24. The horizontal surface 250 of the intermediate horizontal reinforcement 25 has multiple drainage holes (not shown) spaced apart along the length (panel width direction) of the horizontal surface 250.

[0058] In cross section, the lower horizontal reinforcement 26 has a U-shape consisting of a horizontal surface 260, an outdoor-side rising piece 261, and an indoor-side rising piece 262. The U-shape may be formed from a hanging piece instead of the outdoor-side rising piece 261 and the indoor-side rising piece 262. The horizontal surface 260 has a projection dimension equivalent to the distance between the inner surfaces of the first surface member forming the main surface 200 of the outdoor facing surface 20 and the second surface member forming the indoor facing surface 21. The outdoor-side rising piece 261 and the indoor-side rising piece 262 are connected (welded) to the inner surfaces of the first surface member and the second surface member, respectively. The corner formed by the outdoor portion of the horizontal surface 260 and the outdoor-side rising piece 261 abuts against the inner surface of the corner at the lower end of the first surface member (see FIG. 10 ). Both longitudinal ends of the lower horizontal reinforcement 26 are connected (welded) to the facing piece of the fifth surface member forming the side surface portion 24. A plurality of drain holes (not shown) are formed at intervals in the length direction (panel width direction) on the horizontal surface 260 of the lower horizontal reinforcement member 26.

[0059] [C-1-4] Vertical reinforcement for top panel Vertical reinforcements are provided in the internal space of the top panel 2 in a manner that resists vertical forces acting on the top panel 2 and transmits the vertical forces downward. In this embodiment, a first vertical reinforcement 27 is provided between the upper horizontal reinforcement 25' and the intermediate horizontal reinforcement 25 of the top panel 2, located directly below the bottom surface 223 of the recess 221 in the upper surface portion 22 of the top panel 2; a second vertical reinforcement 28 is provided between the intermediate horizontal reinforcement 25 and the lower horizontal reinforcement 26, located directly below the first vertical reinforcement 27; and a third vertical reinforcement 29 is provided between the lower horizontal reinforcement 26 and the third and fourth surface materials that form the lower end portion, located directly below the second vertical reinforcement 28.

[0060] The first vertical reinforcement 27 is provided in a manner that resists vertical forces acting on the top panel 2 and transmits the vertical forces downward. The first vertical reinforcement 27 has a height dimension that allows its upper end to abut against the horizontal surface 250' of the upper horizontal reinforcement 25' and its lower end to abut against the horizontal surface 250 of the middle horizontal reinforcement 25, and also has a projection dimension that allows it to abut against the inner surfaces of the first surface member (main surface 200 of the outdoor facing surface 20) and the second surface member (indoor facing surface 21).

[0061] More specifically, as shown in Figure 9, the first vertical reinforcement member 27 of this embodiment has a hat-shaped cross-sectional shape consisting of an outdoor-side visible surface 270, a pair of visible surfaces 271 extending from both ends of the width direction (visible direction) of the outdoor-side visible surface 270 toward the indoor side, and a pair of indoor-side visible pieces 272 extending in the visible direction so as to be spaced apart from the indoor-side tips of the pair of visible surfaces 271, and the outdoor-side visible surface 270, the pair of visible surfaces 271 and the pair of indoor-side visible pieces 272 extend vertically in the height direction of the top panel 2.

[0062] The visible surface 271 of the first vertical reinforcement 27 has a visible dimension corresponding to the dimension between the inner surface of the first surface material forming the main surface portion 200 of the outdoor-side visible surface 20 and the inner surface of the second surface material forming the indoor-side visible surface 21. The first vertical reinforcement 27 is connected (welded) such that the outdoor-side visible surface 270 abuts the inner surface of the outdoor-side visible surface 20 and the indoor-side visible piece 272 abuts the inner surface of the indoor-side visible surface 21. The upper edge of the first vertical reinforcement 27 (at least one pair of visible surfaces 271) is horizontal and abuts against the lower surface of the horizontal surface 250' of the upper horizontal reinforcement 25'. The lower edge of the first vertical reinforcement 27 (at least one pair of visible surfaces 271) is horizontal and abuts against the upper surface of the horizontal surface 250 of the intermediate horizontal reinforcement 25. A hole 2710 is formed in the lower portion of the visible surface 271.

[0063] The second vertical reinforcement 28 is provided in a manner that resists vertical forces acting on the top panel 2 and transmits the vertical forces downward. The second vertical reinforcement 28 has a height dimension that allows its upper end to abut against the horizontal surface 250 of the middle horizontal reinforcement 25 and its lower end to abut against the horizontal surface 260 of the lower horizontal reinforcement 26, and also has a projection dimension that allows it to abut against the inner surfaces of the first surface member (main surface 200 of the outdoor-side facing surface 20) and the second surface member (indoor-side facing surface 21).

[0064] Similar to the first vertical reinforcement 27 (see Figure 9), the second vertical reinforcement 28 has a hat-shaped cross-sectional shape consisting of an outdoor-side visible surface 280, a pair of visible surfaces 281 extending from both ends of the width direction (visible direction) of the outdoor-side visible surface toward the indoor side, and a pair of indoor-side visible pieces 282 extending in the visible direction so as to be spaced apart from the indoor-side tips of the pair of visible surfaces 281, and the outdoor-side visible surface 280, the pair of visible surfaces 281 and the pair of indoor-side visible pieces 282 extend vertically in the height direction of the top panel 2.

[0065] The visible surface 281 of the second vertical reinforcement 28 has a visible dimension corresponding to the dimension between the inner surface of the first surface material forming the main surface 200 of the outdoor-side visible surface 20 and the inner surface of the second surface material forming the indoor-side visible surface 21. The outdoor-side visible surface 280 of the second vertical reinforcement 28 abuts against the inner surface of the outdoor-side visible surface 20, and the indoor-side visible piece 282 abuts against the inner surface of the indoor-side visible surface 21, and they are connected (welded) together. The upper edge of the second vertical reinforcement 28 (at least one pair of visible surfaces 281) is horizontal and abuts against the lower surface of the horizontal surface 250 of the middle horizontal reinforcement 25. The lower edge of the second vertical reinforcement 28 (at least one pair of visible surfaces 281) is horizontal and abuts against the upper surface of the horizontal surface 260 of the lower horizontal reinforcement 26. Two holes 2810 are formed in the visible surface 281, spaced apart from one another.

[0066] The third vertical reinforcement 29 is provided in a manner that resists vertical forces acting on the top panel 2 and transmits the vertical forces downward. The third vertical reinforcement 29 has a height dimension that allows its upper end to abut the horizontal surface 260 of the lower horizontal reinforcement 26 and its lower end to abut the portions of the third and fourth surface materials (including at least the horizontal surfaces) that form the lower end portions, and also has a projection dimension that allows it to abut the outdoor-side vertical portion of the third surface material (the lower outdoor-side facing surface 202) and the second surface material (the indoor-side facing surface 21).

[0067] The third vertical reinforcement 29, like the first vertical reinforcement 27 (see Figure 9) and the second vertical reinforcement 28, has a hat-shaped cross-sectional shape consisting of an outdoor-side visible surface 290, a pair of visible surfaces 291 extending from both ends of the width direction (visible direction) of the outdoor-side visible surface 290 toward the indoor side, and a pair of indoor-side visible pieces 292 extending in the visible direction so as to be spaced apart from the indoor-side tips of the pair of visible surfaces 291, and the outdoor-side visible surface 290, the pair of visible surfaces 291 and the pair of indoor-side visible pieces 292 extend vertically in the height direction of the top panel 2.

[0068] The visible surface 291 of the third vertical reinforcement 29 has a visible dimension corresponding to the dimension between the part of the third surface material that forms the lower outdoor visible surface 202 and the inner surface of the second surface material that forms the indoor visible surface 21, and the third vertical reinforcement 29 is connected (welded) such that the outdoor visible surface 290 abuts against the inner surface of the third surface material that forms the lower outdoor visible surface 202, and the indoor visible piece 292 abuts against the inner surface of the second surface material that forms the indoor visible surface 21. The upper edge of the third vertical reinforcement 29 (at least one pair of visible surfaces 291) is a horizontal edge and abuts against the underside of the horizontal surface 260 of the lower horizontal reinforcement 26. The lower edge of the third vertical reinforcement 29 (at least one pair of visible surfaces 291) partially abuts the fourth surface material that forms the central horizontal plane 232, the indoor side vertical surface 234, and the indoor side lower surface 235, and more specifically, it has a horizontal edge 293 abutting the central horizontal plane 232, a vertical edge abutting the lower end portion of the indoor side vertical surface 234, and a horizontal edge 294 abutting the indoor side lower surface 235. An opening 2910 is formed below the horizontal edge 293 of the third vertical reinforcement 29.

[0069] [C-2] Middle panel [C-2-1] Outline of the middle panel 11 to 15, the configuration of panel 3 will be described. Panel 3 is a roughly horizontally rectangular plate-like body extending in the opening width direction and having a predetermined width, height, and thickness (projected dimensions), and is composed of an outdoor facing surface 30, an indoor facing surface 31, an upper surface 32, a lower surface 33, and side surfaces 34 on both ends in the width direction.

[0070] The lower end portion of the outdoor sight surface 30 is formed as a step recessed toward the indoor sight surface 31. Specifically, the outdoor sight surface 30 is composed of a main surface portion 300 and a step formed below the main surface portion 300, and the step is formed from a lower edge portion 301 at the lower end of the main surface portion 300 and a lower outdoor sight surface (step sight surface) 302 that is displaced toward the indoor sight surface 31 and hangs down relative to the vertically oriented main surface portion 300.

[0071] The upper surface portion 32 of the panel 3 is formed from a horizontal outdoor upper surface 320, an outdoor inclined surface 321 extending upward toward the indoor side from the indoor side portion of the outdoor upper surface 320, a central horizontal plane 322 extending horizontally toward the indoor side from the indoor side portion of the outdoor inclined surface 321, an indoor inclined surface 323 extending downward toward the indoor side from the indoor side portion of the central horizontal plane 322, an indoor inclined surface 324 hanging down from the indoor side portion of the indoor inclined surface 323, and an indoor lower surface 325 extending horizontally toward the indoor side from the lower end of the indoor inclined surface 324. The outdoor inclined surface 321, the central horizontal plane 322, and the indoor inclined surface 323 form a trapezoidal portion in a side view.

[0072] An outdoor-side rising piece 303 is provided on the outdoor-side portion of the upper surface 32, rising vertically and flush with the main surface 300 of the outdoor-side facing surface 30, and an indoor-side rising piece 310 is provided on the indoor-side portion of the upper surface 32, rising vertically and flush with the indoor-side facing surface 31. The upper end portion of the panel 3 consists of the upper surface 32, the outdoor-side rising piece 303, and the indoor-side rising piece 310. As shown in Figure 11, the width dimension of the outdoor-side rising piece 303 of the panel 3 is smaller than the width dimension of the intermediate panel 3, and a panel widthwise edge 3030 of the outdoor-side rising piece 303 is located inward from the side surface portion 34 of the panel 3.

[0073] In a side view, the underside portion 33 of the panel 3 is formed of an outdoor-side lower surface 330, an outdoor-side inclined surface 331 extending upward toward the indoor side from the indoor-side portion of the outdoor-side lower surface 330, a central horizontal plane 332 extending horizontally toward the indoor side from the indoor-side portion of the outdoor-side inclined surface 331, an indoor-side inclined surface 333 extending downward toward the indoor side from the indoor-side portion of the central horizontal plane 332, an indoor-side vertical surface 334 hanging down from the indoor-side portion of the indoor-side inclined surface 333, and an indoor-side lower surface 335 extending horizontally toward the indoor side from the lower end of the indoor-side vertical surface 334. The outdoor-side inclined surface 331, the central horizontal plane 332, and the indoor-side inclined surface 333 form a trapezoidal portion in a side view.

[0074] The upper end portion of the panel 3 includes an upper surface portion 32, an outdoor-side rising piece 303 that rises vertically and is flush with the main surface portion 300 of the outdoor-side facing surface 30, and an indoor-side rising piece 310 that rises vertically and is flush with the indoor-side facing surface 31. The indoor-side portion of the upper end portion of the panel 3 is formed with a groove extending in the width direction of the panel from the indoor-side vertical surface 324, the indoor-side lower surface 325, and the indoor-side rising piece 310, and an elastic water-stopping member 16 is fitted into the groove. The configuration of the elastic water-stopping member 16 will be described in detail later. In this embodiment, the elastic water-stopping member 16 is provided at the upper end portion of the panel 3. However, an elastic water-stopping member may also be provided at the lower end portion of the panel 3 or at both the upper and lower end portions, so that the elastic water-stopping member is sandwiched between the lower end portion of the upper panel 3 and the upper end portion of the lower panel 3 when the opening is fully closed.

[0075] The lower end portion of the panel 3 comprises the lower end portion of the outdoor-facing surface 30 (a step portion consisting of a lower edge portion 301 and a lower outdoor-facing surface 302) and a lower surface portion 33. As shown in FIG. 14 , a buffer / airtight member 15 extending in the opening width direction is provided on a central horizontal surface 332 of the lower surface portion 33. The buffer / airtight member 15 has a dimension shorter than the overall width of the panel, and the longitudinal edge of the buffer / airtight member 15 substantially coincides with the panel widthwise edge 3030 of the outdoor-side rising piece 303. The buffer / airtight member 15 according to this embodiment is formed from a first layer 150 made of high-hardness flame-retardant rubber (such as chloroprene rubber, which primarily functions as a buffer material) and a second layer 151 made of low-hardness flame-retardant foam (such as EPDM foam, which primarily functions as an airtight material), but the materials are not limited thereto. In this embodiment, the buffer and airtight member 15 has a two-layer structure, but the present invention is not limited to this, and a single-layer buffer and airtight member 15 may be formed from a single member. In this embodiment, the buffer and airtight member 15 is provided at the lower end portion of the panel 3, but the buffer and airtight member may be provided at the upper end portion or at both the upper and lower end portions of the panel 3, so that when the opening is in the fully closed position, the buffer and airtight member is sandwiched between the lower end portion of the upper panel 3 and the upper end portion of the lower panel 3.

[0076] 14 and 15, end room outer airtight members 17 are provided at both ends of the lower outdoor-facing visible surface 302 of the panel 3 in the panel width direction. The end room outer airtight members 17 are rectangular in front view and have a height equivalent to the overall height of the lower outdoor-facing visible surface 302 of the panel 3 (slightly greater than the overall height of the lower outdoor-facing visible surface 302 in the illustrated embodiment), and a visible dimension approximately equivalent to the distance between the side portion 34 of the panel 3 and the panel widthwise edge 3030 of the outdoor-side rising piece 303. The thickness of the end room outer airtight members 17 is greater than the visible dimension of the lower edge 301 of the lower end of the main surface portion 300 of the outdoor-facing visible surface 30. When attached to both ends of the lower outdoor-facing visible surface 302 in the panel width direction, the outer surface of the end room outer airtight members 17 is located slightly outdoors relative to the main surface 300. The end room outer airtight members 17 according to this embodiment are made of flame-retardant rubber sponge (chloroprene rubber, etc.), but the material is not limited thereto. In this embodiment, the end room outer airtight members 17 are provided at both ends in the panel width direction near the lower end of the panel 3, but depending on the shape of the outdoor facing surface 30 of the panel 3, the end room outer airtight members may also be provided at the upper end.

[0077] As shown in Figures 14 and 15, a lower end airtight member 18 is provided to connect the end room outer airtight member 17 and the buffer / airtight member 15. The lower end airtight member 18 extends along the outdoor lower surface 330, the outdoor inclined surface 331, and the central horizontal plane 332 at both widthwise ends of the lower end of the panel 3. The lower end of the end room outer airtight member 17 extends downward beyond the outdoor lower surface 330, and a portion of the outdoor portion of the lower end airtight member 18 is in close contact with the inner surface of the lower end of the end room outer airtight member 17. The lower end airtight member 18 according to this embodiment is formed from a first layer 180 made of a high-hardness flame-retardant rubber sponge (e.g., chloroprene rubber) and a second layer 181 made of a low-hardness flame-retardant foam (e.g., EPDM foam, which mainly functions as an airtight material), but the materials are not limited thereto. In this embodiment, a two-layer lower end airtight member 18 is shown, but this is not limiting. A single-layer lower end airtight member 18 may be formed from a single member. As shown in FIG. 14 , an airtight member is provided across the entire width of the panel, including a buffer / airtight member 15, left and right lower end airtight members 18 tightly attached to both longitudinal ends of the buffer / airtight member 15, and left and right outer end airtight members 17 tightly attached to the outdoor-facing portions of the left and right lower end airtight members 18. The description of the configuration of the lower end portion of the panel 3 can be applied to the configuration of the lower end portion of the top panel 2 ( FIG. 10A ). In this embodiment, a lower end airtight member 18 is provided at the lower end portion of the panel 3. However, a lower end airtight member may be provided at the upper end portion or at both the upper and lower end portions of the panel 3, so that the lower end airtight member is sandwiched between the lower end portion of the upper panel 3 and the upper end portion of the lower panel 3 when the opening is fully closed.

[0078] [C-2-2] Surface material of the middle panel The panel 3 is assembled from multiple steel plates formed into a predetermined shape. In this embodiment, the main surface 300 of the outdoor-facing surface 30 of the panel 3 is formed from a first surface material, and folded pieces are integrally formed at the upper and lower ends of the first surface material, with the folded piece at the upper end forming the outdoor-facing horizontal surface 320 of the upper surface 32 and the folded piece at the lower end forming the lower edge 301. The indoor-facing surface 31 of the panel 3 is formed from a second surface material, and the upper end of the second surface material forms an indoor-side rising piece 310 and the lower end is integrally formed with a folded piece, which forms the indoor-side lower surface 335 of the lower surface 33.

[0079] The outdoor-facing portion of upper surface portion 32 is made of a third surface material bent into a predetermined shape, and the indoor-facing portion of upper surface portion 32 is made of a fourth surface material bent into a predetermined shape, with the third and fourth surface material portions overlapping to form central horizontal plane 322. Outdoor-side rising piece 303 is made of a plate material that is L-shaped in side view.

[0080] The lower outdoor facing surface 301 of the outdoor facing surface 30 and the outdoor portion of the underside 33 are made of a fifth surface material folded into a predetermined shape, and the indoor portion of the underside 33 is made of a sixth surface material folded into a predetermined shape, with portions of the fifth and sixth surface materials overlapping to form a central horizontal plane 332, and portions of the sixth surface material overlapping the folded piece at the bottom end of the second surface material to form an indoor-side underside 335. The sixth surface material forming the indoor-side vertical surface 334 of the underside 33 has multiple drainage holes (not shown) formed at intervals across the width of the panel, located at the lower end of the indoor-side vertical surface 334. The drainage holes may be formed partially across the indoor-side underside 335.

[0081] The side surface portion 34 is formed from a surface portion having a shape that follows the cross-sectional shape of the panel 3 and a seventh surface member consisting of a pair of facing pieces, which are abutted and connected (welded) to the inner surfaces of the outdoor facing surface 30 and the indoor facing surface 31. The upper end of the seventh surface member that forms the side surface portion 34 at least partially abuts the inner surfaces of the third and fourth surface members that form the upper surface portion 32, and the lower end at least partially abuts the fifth and sixth surface members that form the lower surface portion 33. A hole 340 (see FIG. 15 ) is formed in the side surface portion 34 so as to span the horizontal surface 350 of the intermediate horizontal reinforcement member 35. Furthermore, a gap 341 and an opening 342 are formed in the lower portion of the side surface portion 34 as drainage openings.

[0082] Although the first to seventh surface materials formed into predetermined shapes have been described, these are merely examples, and the shape, number, assembly structure, etc. of the surface materials (plate materials) that form the surface of panel 3 are not limited.

[0083] [C-2-3] Horizontal reinforcement for intermediate panel A plurality of horizontal reinforcement members extending across the entire width are provided inside the panel 3. Note that a plurality of horizontal reinforcement members that are shorter than the entire width of the panel 3 may be connected in the opening width direction. As shown in Figures 11 and 13, in this embodiment, the panel 3 is provided with two horizontal reinforcement members: a middle horizontal reinforcement member 35 and a lower horizontal reinforcement member 36.

[0084] In cross section, the intermediate horizontal reinforcement 35 has a U-shape consisting of a horizontal surface 350, an outdoor-side hanging piece 351, and an indoor-side hanging piece 352. The U-shape may be formed from a rising piece and a hanging piece instead of the outdoor-side hanging piece 351 and the indoor-side hanging piece 352. The horizontal surface 350 has a projection dimension equivalent to the distance between the inner surfaces of the first surface member forming the main surface 300 of the outdoor facing surface 30 and the second surface member forming the indoor facing surface 31. The outdoor-side hanging piece 351 and the indoor-side hanging piece 352 are respectively abutted and connected (welded) to the inner surfaces of the first surface member and the second surface member. Both longitudinal ends of the intermediate horizontal reinforcement 35 are connected (welded) to the facing piece of the seventh surface member forming the side surface 34. The horizontal surface 350 of the intermediate horizontal reinforcement 35 has multiple drainage holes (not shown) spaced apart along the length (panel width direction) of the horizontal surface 350.

[0085] In cross section, the lower horizontal reinforcement 36 has a U-shape consisting of a horizontal surface 360, an outdoor-side rising piece 361, and an indoor-side rising piece 362. The U-shape may be formed from a hanging piece instead of the outdoor-side rising piece 361 and the indoor-side rising piece 362. The horizontal surface 360 ​​has a projection dimension equivalent to the distance between the inner surfaces of the first surface member forming the main surface 300 of the outdoor facing surface 30 and the second surface member forming the indoor facing surface 31. The outdoor-side rising piece 361 and the indoor-side rising piece 362 are respectively abutted and connected (welded) to the inner surfaces of the first surface member and the second surface member. The corner formed by the outdoor portion of the horizontal surface 360 ​​and the outdoor-side rising piece 361 abuts against the inner surface of the lower corner of the first surface member (see FIG. 13 ). Both longitudinal ends of the lower horizontal reinforcement are connected (welded) to the facing piece of the seventh surface member forming the side surface portion 34. A plurality of drain holes (not shown) are formed at intervals in the length direction (panel width direction) on the horizontal surface 360 ​​of the lower horizontal reinforcement member 36.

[0086] [C-2-4] Vertical reinforcement for intermediate panel In the internal space of panel 3, vertical reinforcements are provided in a manner that resists vertical forces acting on panel 3 and transmits the vertical forces downward. In this embodiment, a first vertical reinforcement 37 is provided between the third and fourth surface materials that form the upper surface portion 32 of panel 3 and the intermediate horizontal reinforcement 35, and is located immediately below the vertical reinforcement of the panel directly above (the third vertical reinforcement 29 to 39 of top panel 2 to panel 3) when the shutter curtain 1 is in the fully closed position. A second vertical reinforcement 38 is provided between the intermediate horizontal reinforcement 35 and the lower horizontal reinforcement 36, and is located immediately below the first vertical reinforcement 37. A third vertical reinforcement 39 is provided between the lower horizontal reinforcement 36 and the fifth and sixth surface materials that form the lower surface portion 33, and is located immediately below the second vertical reinforcement 38.

[0087] The first vertical reinforcement 37 is provided in a manner that resists vertical forces acting on the panel 3 and transmits the vertical forces downward. The first vertical reinforcement 37 has a height dimension that allows its upper end to partially abut against the third and fourth surface materials that form the top surface 32, and its lower end to abut against the horizontal surface 350 of the intermediate horizontal reinforcement 35, and also has a projection dimension that allows it to abut against the inner surfaces of the first surface material (main surface 300 of the outdoor facing surface 30) and the second surface material (indoor facing surface 31).

[0088] More specifically, as shown in Figure 12, the first vertical reinforcement member 37 of this embodiment has a hat-shaped cross-sectional shape consisting of an outdoor-side visible surface 370, a pair of visible surfaces 371 extending from both ends of the width direction (visible direction) of the outdoor-side visible surface 370 toward the indoor side, and a pair of indoor-side visible pieces 372 extending in the visible direction so as to be spaced apart from the indoor-side tips of the pair of visible surfaces 371, and the outdoor-side visible surface 370, the pair of visible surfaces 371 and the pair of indoor-side visible pieces 372 extend perpendicularly in the height direction of the panel 3.

[0089] The projected surface 371 of the first vertical reinforcement member 37 has a projected dimension equivalent to the dimension between the inner surface of the first surface material forming the main surface portion 300 of the outdoor facing surface 30 and the second surface material forming the indoor facing surface 31, and the first vertical reinforcement member 37 is connected (welded) such that the outdoor facing surface 370 abuts the inner surface of the outdoor facing surface 30 and the indoor facing piece 372 abuts the inner surface of the indoor facing surface 31.

[0090] The upper edge of the first vertical reinforcement 37 (at least one pair of visible surfaces 371) is shaped to follow the third and fourth surface materials that form the upper surface portion 32, and is in partial contact (at least the horizontal portion) with the lower surfaces of the third and fourth surface materials that form the upper surface portion 32. The lower edge of the first vertical reinforcement 37 (at least one pair of visible surfaces 371) is a horizontal edge that is in contact with the upper surface of the horizontal surface 350 of the intermediate horizontal reinforcement 35. A hole 3710 is formed in the lower portion of the visible surface 371.

[0091] The second vertical reinforcement 38 is provided in a manner that resists vertical forces acting on the panel 3 and transmits the vertical forces downward. The second vertical reinforcement 38 has a height dimension that allows its upper end to abut against the horizontal surface 350 of the middle horizontal reinforcement 35 and its lower end to abut against the horizontal surface 360 ​​of the lower horizontal reinforcement 36, and also has a projection dimension that allows it to abut against the first surface material (main surface 300 of the outdoor-side facing surface 30) and the second surface material (indoor-side facing surface 31).

[0092] Like the first vertical reinforcement 37 (see Figure 12), the second vertical reinforcement 38 has a hat-shaped cross-sectional shape consisting of an outdoor-side visible surface 380, a pair of visible surfaces 381 extending from both ends of the width direction (visible direction) of the outdoor-side visible surface toward the indoor side, and a pair of indoor-side visible pieces 382 extending in the visible direction so as to be spaced apart from the indoor-side tips of the pair of visible surfaces 381, and the outdoor-side visible surface 380, the pair of visible surfaces 381 and the pair of indoor-side visible pieces 382 extend vertically in the height direction of the panel 3.

[0093] The projected surface 381 of the second vertical reinforcement member 38 has a projected dimension equivalent to the dimension between the inner surface of the first surface material forming the main surface portion 300 of the outdoor facing surface 30 and the second surface material forming the indoor facing surface 31, and the second vertical reinforcement member 38 is connected (welded) such that the outdoor facing surface 380 abuts the inner surface of the outdoor facing surface 30 and the indoor facing piece 382 abuts the inner surface of the indoor facing surface 31.

[0094] The upper edge of the second vertical reinforcement 38 (at least one pair of visible surfaces 381) is a horizontal edge that abuts against the underside of the surface 350 of the middle horizontal reinforcement 35. The lower edge of the second vertical reinforcement 38 (at least one pair of visible surfaces 381) is a horizontal edge that abuts against the upper surface of the horizontal surface 360 ​​of the lower horizontal reinforcement 36. Two holes 3810 are formed in the visible surfaces 381, spaced apart from each other above and below.

[0095] The third vertical reinforcement 39 is provided in a manner that resists vertical forces acting on the panel 3 and transmits the vertical forces downward. The third vertical reinforcement 39 has a height dimension that allows its upper end to abut the horizontal surface 360 ​​of the lower horizontal reinforcement 36 and its lower end to abut the portions of the fifth and sixth surface materials (including at least the horizontal surfaces) that form the lower end portions, and also has a projection dimension that allows it to abut the outdoor-side vertical portion of the fifth surface material (lower outdoor-side facing surface 302) and the second surface material (indoor-side facing surface 31).

[0096] Like the first vertical reinforcement 37 (see Figure 12) and the second vertical reinforcement 38, the third vertical reinforcement 39 has a hat-shaped cross-sectional shape consisting of an outdoor-side visible surface 390, a pair of visible surfaces 391 extending from both ends of the width (visible direction) of the outdoor-side visible surface 390 toward the indoor side, and a pair of indoor-side visible pieces 392 extending in the visible direction so as to be spaced apart from the indoor-side tips of the pair of visible surfaces 391, and the outdoor-side visible surface 390, the pair of visible surfaces 391 and the pair of indoor-side visible pieces 392 extend vertically along the height direction of the panel 3.

[0097] The projected surface 391 of the third vertical reinforcement member 39 has a projected dimension corresponding to the dimension between the part of the fifth surface material that forms the lower outdoor facing surface 302 and the inner surface of the second surface material that forms the indoor facing surface 31, and the third vertical reinforcement member 39 is connected (welded) such that the outdoor facing surface 390 abuts the inner surface of the fifth surface material that forms the lower outdoor facing surface 302, and the indoor facing piece 392 abuts the inner surface of the second surface material that forms the indoor facing surface 31.

[0098] The upper edge of the third vertical stiffener 39 (at least one pair of visible surfaces 391) is a horizontal edge that abuts against the underside of the horizontal surface 350 of the intermediate horizontal stiffener 35. The lower edge of the third vertical stiffener 39 (at least one pair of visible surfaces 391) partially abuts against the sixth surface material that forms the central horizontal surface 332, the indoor side vertical surface 334, and the indoor side lower surface 335. More specifically, the third vertical stiffener 39 has a horizontal edge 393 abutting against the central horizontal surface 332, a vertical edge abutting against the lower end of the indoor side vertical surface 334, and a horizontal edge 394 abutting against the indoor side lower surface 335. An opening 3910 is formed below the horizontal edge 393 of the third vertical stiffener 39.

[0099] [C-3] Bottom panel [C-3-1] Outline of bottom panel (panel body) The configuration of the bottom panel 4 according to this embodiment will be described with reference to FIGS. 16 to 18. The bottom panel 4 comprises a bottom panel main body 4' and a movable seat plate 6 attached to the lower end of the bottom panel main body 4'. The bottom panel main body 4' is a roughly horizontally rectangular plate-like body extending in the opening width direction and having a predetermined width, height, and thickness (projected dimensions). The bottom panel main body 4' comprises an outdoor-facing surface 40, an indoor-facing surface 41, an upper surface 42, a lower surface 43 (outdoor-facing lower surface 430, indoor-facing lower surface 31), and side surfaces 44 at both widthwise ends. As shown in FIG. 16, the width (projected dimension) of the movable seat plate 6 is the same as the width (projected dimension) of the bottom panel main body 4', and the projected dimension of the movable seat plate 6 is the same as the projected dimension of the bottom panel main body 4'.

[0100] The upper surface 42 of the panel body 4' of the bottom panel 4 is formed from a horizontal outdoor upper surface 420, an outdoor inclined surface 421 extending from the indoor side portion of the outdoor upper surface 420 toward the indoor side and upward, a central horizontal plane 422 extending horizontally from the indoor side portion of the outdoor inclined surface 421 toward the indoor side, an indoor side inclined surface 423 extending from the indoor side portion of the central horizontal plane 422 toward the indoor side and downward, an indoor side vertical surface 424 hanging down from the indoor side portion of the indoor side inclined surface 423, and an indoor side lower surface 425 extending horizontally toward the indoor side from the lower end of the indoor side vertical surface 424.

[0101] The outdoor-facing portion of the top surface 42 is provided with an outdoor-side rising piece 400 that rises vertically and is flush with the outdoor-facing surface 40. The indoor-facing portion of the top surface 42 is provided with an indoor-side rising piece 410 that rises vertically and is flush with the indoor-side facing surface 41. The upper end portion of the panel main body 4' comprises the top surface 42, the outdoor-side rising piece 400, and the indoor-side rising piece 410. As shown in FIG. 16 , the width of the outdoor-side rising piece 400 of the panel main body 4' is smaller than the width of the panel main body 4', and the panel widthwise edge 4000 of the outdoor-side rising piece 400 is located inward from the side surface 44 of the panel main body 4'. The configuration of the upper end portion of the panel main body 4' is substantially the same as that of the panel 3. For a top view of the bottom panel main body 4', see the top view of the panel 3 shown in FIG. 11.

[0102] The lower end portion of the panel body 4' consists of an outdoor lower surface 430, an indoor lower surface 431, and an opening formed between the indoor end of the outdoor horizontal lower surface 430 and the outdoor end of the indoor lower surface 431, and a movable seat plate 6 is provided at the lower end portion of the panel body 4' so as to be able to move up and down.

[0103] [C-3-2] Bottom panel (panel body) surface material The main body 4' of the bottom panel 4 is assembled from multiple steel plates formed into a predetermined shape. In this embodiment, the outdoor facing surface 40 of the main body 4' is formed from a first surface material, and folded pieces are integrally formed at the upper and lower ends of the first surface material, with the upper folded piece forming the outdoor upper surface 420 of the top surface 42 and the lower folded piece acting as an outdoor horizontal piece to form the outdoor lower surface 430. The indoor facing surface 41 of the panel main body 4' is formed from a second surface material, and the upper end of the second surface material forms the indoor rising piece 410 and the lower folded piece acting as an indoor horizontal piece to form the indoor lower surface 431.

[0104] The outdoor-facing portion of upper surface portion 42 is made of a third surface material bent into a predetermined shape, and the indoor-facing portion of upper surface portion 42 is made of a fourth surface material bent into a predetermined shape, with the third and fourth surface materials overlapping to form central horizontal plane 422. Outdoor-side rising piece 400 is made of a plate material that is L-shaped in side view.

[0105] The side surface portion 44 is formed from a surface portion having a shape that follows the cross-sectional shape of the panel main body 4′ and a fifth surface member consisting of a pair of facing pieces, and the pair of facing pieces abut and are connected (welded) to the inner surfaces of the outdoor facing surface 40 and the indoor facing surface 41, respectively. As shown in FIG. 17A , a hole 440 is formed in the side surface portion 44 so as to span a horizontal surface 450 of the middle horizontal reinforcement member 45. A gap 441, a hole 442, and a hole 443 formed so as to span a horizontal surface 460 of the lower horizontal reinforcement member 46 are provided in a lower portion of the side surface portion 44. Although the first to fifth surface members formed into predetermined shapes have been described above, these are merely examples, and the shape, number, assembly structure, etc. of the surface materials (plate materials) that form the surface of the bottom panel main body 4′ are not limited.

[0106] [C-3-3] Horizontal reinforcement for bottom panel (panel body) A plurality of horizontal reinforcements extending across the entire width of the panel body 4' are provided inside the panel body 4'. It is also possible to connect a plurality of horizontal reinforcements that are shorter than the entire width of the panel body 4' in the opening width direction. In this embodiment, the panel body 4' is provided with two horizontal reinforcements: a middle horizontal reinforcement 45 and a lower horizontal reinforcement 46.

[0107] In cross section, the intermediate horizontal reinforcement 45 has a U-shape formed by a horizontal surface 450, an outdoor-side hanging piece 451, and an indoor-side hanging piece 452. Note that the U-shape may be formed by rising pieces instead of the outdoor-side hanging piece 451 and the indoor-side hanging piece 452. The horizontal surface 450 has a projection dimension equivalent to the distance between the inner surfaces of the first surface member forming the outdoor facing surface 40 and the second surface member forming the indoor facing surface 41. The outdoor-side hanging piece 451 and the indoor-side hanging piece 452 are abutted and connected (welded) to the inner surfaces of the first surface member and the second surface member, respectively. Both longitudinal ends of the intermediate horizontal reinforcement 45 are connected (welded) to the facing piece of the fifth surface member forming the side surface 44. The horizontal surface 450 of the intermediate horizontal reinforcement 45 has multiple drainage holes (not shown) spaced apart along the length (panel width direction) of the horizontal surface 450.

[0108] In a cross-sectional view, the lower horizontal reinforcement member 46 has a U-shape made up of a horizontal surface 460, an outdoor-side vertical surface 461 hanging down from the outdoor-side end of the horizontal surface 460, and an indoor vertical surface 462 hanging down from the indoor-side end of the horizontal surface 460. The horizontal surface 460 has a projected dimension equivalent to the dimension between the inner surfaces of the first surface material forming the outdoor-side facing surface 40 and the second surface material forming the indoor-side facing surface 41, and the outdoor-side vertical surface 461 and the indoor-side vertical surface 462 abut and are connected (welded) to the inner surfaces of the outdoor-side facing surface 40 and the indoor-side facing surface 41. The lower end of the outdoor-side vertical surface 461 abuts against the base end of the outdoor-side lower surface 430, which is an outdoor horizontal piece, and the lower end of the indoor-side vertical surface 462 abuts against the base end of the indoor-side lower surface 431, which is an indoor horizontal piece. The height dimension of the lower horizontal reinforcement 46 is greater than the height dimension of the intermediate horizontal reinforcement 45, and a plurality of detection switches SW are provided across the width in the space surrounded by the lower horizontal reinforcement 46, the outdoor-side lower surface 430, and the indoor-side lower surface 431. A horizontal surface 460 of the lower horizontal reinforcement 46 serves as the mounting surface for the detection switches SW. A plurality of drain holes (not shown) are formed in the horizontal surface 460 of the lower horizontal reinforcement 46 at intervals in the length direction (panel width direction).

[0109] [C-3-4] Vertical reinforcement for bottom panel (panel body) In the internal space of the main body 4', vertical reinforcements are provided in a manner that resists vertical forces acting on the panel main body 4' and transmits the vertical forces downward. In this embodiment, a first vertical reinforcement 47 is provided between the third and fourth surface materials that form the upper surface portion 42 of the panel main body 4' and the intermediate horizontal reinforcement 45, positioned directly below the vertical reinforcement (third vertical reinforcement 39) of the panel 3 directly above when the shutter curtain 1 is in the fully closed position, and a second vertical reinforcement 48 is provided between the intermediate horizontal reinforcement 45 and the lower horizontal reinforcement 46, positioned directly below the first vertical reinforcement 47.

[0110] The first vertical reinforcement 47 is provided in a manner that resists vertical forces acting on the panel body 4' and transmits the vertical forces downward. The first vertical reinforcement 47 has a height dimension such that its upper end partially abuts the third and fourth surface materials that form the top surface 42, and its lower end abuts the horizontal surface 450 of the intermediate horizontal reinforcement 45, and also has a projection dimension such that it abuts the inner surfaces of the first surface material (outdoor-side facing surface 40) and the second surface material (indoor-side facing surface 41).

[0111] More specifically, the first vertical reinforcement member 47 of this embodiment has a hat-shaped cross-sectional shape consisting of an outdoor-side visible surface 470, a pair of visible surfaces 471 extending from both ends of the width direction (visible direction) of the outdoor-side visible surface 470 toward the indoor side, and a pair of indoor-side visible pieces 472 extending in the visible direction so as to be spaced apart from the indoor-side tips of the pair of visible surfaces 471, and the outdoor-side visible surface 470, the pair of visible surfaces 471 and the pair of indoor-side visible pieces 472 extend vertically in the height direction of the panel main body 4'.

[0112] The projected surface 471 of the first vertical reinforcement member 47 has a projected dimension corresponding to the dimension between the inner surfaces of the first surface material forming the outdoor facing surface 40 and the second surface material forming the indoor facing surface 41, and the first vertical reinforcement member 47 is connected (welded) such that the outdoor facing surface 470 abuts the inner surface of the outdoor facing surface 40 and the indoor facing piece 472 abuts the inner surface of the indoor facing surface 41.

[0113] The upper edge of the first vertical reinforcement 47 (at least one pair of visible surfaces 471) is shaped to follow the third and fourth surface materials that form the upper surface portion 42, and is in partial contact (at least the horizontal portion) with the lower surfaces of the third and fourth surface materials that form the upper surface portion 42. The lower edge of the first vertical reinforcement 47 (at least one pair of visible surfaces 471) is a horizontal edge that is in contact with the upper surface of the horizontal surface 450 of the intermediate horizontal reinforcement 45. A hole 4710 is formed in the lower portion of the visible surface 471.

[0114] The second vertical reinforcement 48 is provided in a manner that resists vertical forces acting on the panel body 4' and transmits the vertical forces downward. The second vertical reinforcement 48 has a height dimension that allows its upper end to abut against the horizontal surface 450 of the middle horizontal reinforcement 45 and its lower end to abut against the horizontal surface 460 of the lower horizontal reinforcement 46, and also has a projection dimension that allows it to abut against the first surface material (outdoor-side facing surface 40) and the second surface material (indoor-side facing surface 41).

[0115] Like the first vertical reinforcement 47, the second vertical reinforcement 48 has a hat-shaped cross-sectional shape consisting of an outdoor-side facing surface 480, a pair of facing surfaces 481 extending from both ends of the width direction (facing direction) of the outdoor-side facing surface toward the indoor side, and a pair of indoor-side facing pieces 482 extending in the facing direction so as to be spaced apart from the indoor-side tips of the pair of facing surfaces 481, and the outdoor-side facing surface 480, the pair of facing surfaces 481 and the pair of indoor-side facing pieces 482 extend vertically in the height direction of the panel main body 4'.

[0116] The projected surface 481 of the second vertical reinforcement member 48 has a projected dimension corresponding to the dimension between the inner surfaces of the first surface material forming the outdoor facing surface 40 and the second surface material forming the indoor facing surface 41, and the second vertical reinforcement member 48 is connected (welded) such that the outdoor facing surface 480 abuts the inner surface of the outdoor facing surface 40 and the indoor facing piece 482 abuts the inner surface of the indoor facing surface 41.

[0117] The upper edge of the second vertical reinforcement 48 (at least a pair of visible surfaces 481) is a horizontal edge and abuts against the lower surface of the horizontal surface 450 of the intermediate horizontal reinforcement 45. The lower edge of the second vertical reinforcement 48 (at least a pair of visible surfaces 481) is a horizontal edge and abuts against the upper surface of the horizontal surface 460 of the lower horizontal reinforcement 46. In this embodiment, the entire lower edge of the second vertical reinforcement 48 is a horizontal edge and abuts against the upper surface of the horizontal surface 460 of the lower horizontal reinforcement 46. Two holes 4810 are formed in the visible surface 481, spaced apart from each other above and below.

[0118] [C-3-5] Bottom panel seat As shown in Fig. 16, the movable seat panel 6 according to this embodiment is a long member extending across the entire width of the panel body 4' of the bottom panel 4. As shown in Fig. 22, the movable seat panel 6 is composed of a bottom surface 60 extending in the opening width direction, an outdoor-side rising piece (an outdoor-side facing piece) 61 rising from the outdoor-side end of the bottom surface 60, an indoor-side rising piece (an indoor-side facing piece) 62 rising from the indoor-side end of the bottom surface 60, an outdoor-side facing surface 63 located on the indoor side of the outdoor-side rising piece 61 and rising from the bottom surface 60, an indoor-side facing surface 64 located on the outdoor side of the indoor-side rising piece 62 and rising from the bottom surface 60, an outdoor-side locking piece 65 extending horizontally from the upper end of the outdoor-side facing surface 63 to the outdoor side, and an indoor-side locking piece 66 extending horizontally from the upper end of the indoor-side facing surface 64 to the indoor side.

[0119] The dimension between the outdoor facing surface 63 and the indoor facing surface 64 of the movable seat plate 6 is slightly smaller than the width of the opening on the underside of the panel main body 4', and the movable seat plate 6 is suspended from the lower end of the panel main body 4' so as to be able to move upward, with the outdoor locking piece 65 locked to the outdoor lower surface 430, which is the outdoor horizontal piece of the panel main body 4', and the indoor locking piece 66 locked to the indoor lower surface 431, which is the indoor horizontal piece of the panel main body 4'.

[0120] Located inside the lower end of the panel main body 4' (the space surrounded by the lower horizontal reinforcement 46), multiple detection switches SW are attached at intervals in the width direction of the panel on the horizontal surface 460 of the lower horizontal reinforcement 46.When the shutter curtain 1 descends, the bottom surface of the movable seat plate 6 abuts against an obstacle or the floor surface, causing the movable seat plate 6 to move upward relative to the panel main body 4', and any of the detection switches SW turns ON, an obstacle detection signal is sent to the control unit via the cord reel CR.

[0121] The projected dimensions of the movable seat plate 6 are the same as those of the panel body 4', the outdoor facing surface 40 of the panel body 4' and the outdoor rising piece 61 of the movable seat plate 6 are flush, and the indoor facing surface 41 of the panel body 4' and the indoor rising piece 62 of the movable seat plate 6 are flush.

[0122] A groove is formed in the outdoor-side portion of the movable seat plate 6, extending in the length direction of the movable seat plate 6 (width direction of the bottom panel 4) from the outdoor-side portion of the bottom surface 60, the outdoor-side rising piece 61, and the outdoor-side facing surface 63, and an outdoor-side elastic water-stopping member 16α is fitted into the groove. As will be described later, the outdoor-side elastic water-stopping member 16α also functions as an airtight member.

[0123] A groove is formed in the indoor-side portion of the movable base plate 6, extending from the indoor-side portion of the bottom surface 60, the indoor-side rising piece 62, and the indoor-side visible surface 64 in the length direction of the movable base plate 6 (the width direction of the bottom panel 4), and an indoor-side elastic water-stopping member 16β is fitted into the groove. Except for slight differences in size and shape, the configuration of the indoor-side elastic water-stopping member 16β provided on the movable base plate 6 is the same as that of the elastic water-stopping member 16 provided on the panel 3, and common reference numbers are used for each component (Figures 26 and 27), so the description of the elastic water-stopping member 16 can be used. Furthermore, the configurations of the indoor-side elastic water-stopping member 16β and the outdoor-side elastic water-stopping member 16α are substantially the same. In this embodiment, an outdoor-side elastic water-stopping member 16α and an indoor-side elastic water-stopping member 16β are provided on the movable seat plate 6, but the outdoor-side elastic water-stopping member and the indoor-side elastic water-stopping member may be provided on the underside 43 (outdoor-side underside 430, indoor-side underside 31) of the bottom panel main body 4′, or on both the movable seat plate 6 and the underside 43, so that when the opening is in the fully closed position, the outdoor-side elastic water-stopping member and the indoor-side elastic water-stopping member are sandwiched between the movable seat plate 6 and the underside 43 of the bottom panel main body 4′.

[0124] An elastic water-stopping member 19 is provided on the underside of the bottom surface 60 of the movable seat plate 6 across the entire width, which contacts the floor surface FL when the seat plate 6 lands on the floor and is pressed against the floor surface FL when pressed vertically.

[0125] [C-4] Configuration of fitting of adjacent panels above and below in shutter curtains In the shutter curtain 1 in the fully closed position, the lower end portion of the top panel 2 fits into the upper end portion of panel 3, the lower end portion of panel 3 fits into the upper end portion of panel 3, and the lower end portion of panel 3 fits into the upper end portion of bottom panel 4. In this embodiment, of the vertically adjacent panels, the lower end portion or lower part of the upper panel is generally concave, and the upper end portion or upper part of the lower panel is generally convex, so that they fit into each other via the concave-convex shape when the opening is fully closed. Since the configuration of the lower end portion of the top panel 2 is the same as the configuration of the lower end portion of panel 3, and the configuration of the upper end portion of the bottom panel 4 is the same as the configuration of the upper end portion of panel 3, the fit between the vertically adjacent panels of the shutter curtain 1 according to this embodiment will be described based on the fit between the vertically adjacent panels 3 in the shutter curtain 1 in the fully closed position.

[0126] First, we will explain the position before the lower end portion of the upper panel 3 and the upper end portion of the lower panel 3 fit together. When the shutter curtain 1 is lowered, each panel 3 is in a vertical position, and the lower end portion of the upper panel 3 is spaced apart from the upper end portion of the lower panel 3 (see the left diagram of Figure 4 and Figure 21). Figure 21 shows the positional relationship between the lower end portion of the upper panel 3 and the upper end portion of the lower panel 3 when the panels 3 are lowered. The left diagram of Figure 21 shows the positional relationship between the lower end portion of the upper panel 3 and the upper end portion of the lower panel 3 when the outdoor facing surface 30 and the indoor facing surface 31 of the upper and lower panels 3 are aligned.

[0127] In the left drawing of FIG. 21 , the lower outdoor-side visible surface 302 of the lower end portion of the upper panel 3 and the upper end portion (the hemmed folded portion) of the outdoor-side rising piece 303 of the upper end portion of the lower panel 3 are close to each other (separated in this embodiment), the outdoor-side upper surface 320 of the upper surface portion 32 of the upper end portion of the lower panel 3 is located directly below the outdoor-side lower surface 330 of the lower surface portion 33 of the lower end portion of the upper panel 3, the outdoor-side inclined surface 321 of the upper surface portion 32 of the upper end portion of the lower panel 3 is located directly below the outdoor-side inclined surface 331 of the lower surface portion 33 of the lower end portion of the upper panel 3, and the central horizontal surface 322 of the upper surface portion 32 of the upper end portion of the lower panel 3 is located directly below the central horizontal surface 332 of the lower surface portion 33 of the lower end portion of the upper panel 3. 21 , the indoor-side inclined surface 323 of the upper surface portion 32 at the upper end of the lower panel 3 is located immediately below the indoor-side inclined surface 333 of the lower surface portion 33 at the lower end of the upper panel 3, the indoor-side vertical surface 324 of the upper surface portion 32 at the upper end of the lower panel 3 is located slightly outdoors of the indoor-side vertical surface 334 of the lower surface portion 33 at the lower end of the upper panel 3 (the indoor-side vertical surface 334 hangs down close to the indoor-side vertical surface 324), and the elastic water-stopping member 16 (upper surface 164) is located immediately below the indoor-side lower surface 335 of the lower surface portion 33 at the lower end of the upper panel 3 in the indoor-side part of the upper end of the lower panel 3 (the groove formed by the indoor-side vertical surface 324, the indoor-side lower surface 325, and the indoor-side rising piece 310). When the upper panel 3 moves downward relative to the lower panel 3 from the state shown in the left diagram of FIG. 21 , the state shown in FIG. 19 is obtained.

[0128] The central view of Figure 21 shows a state in which the upper panel 3 is slightly displaced indoors relative to the lower panel 3 when the adjacent panels 3 are lowered. If the shutter curtain 1 is displaced indoors when it is lowered, the indoor-side facing surface 31 of the panel 3 abuts the watertight rubber member 55, so it does not displace further indoors from the state shown in the central view of Figure 21. In the central view of Figure 21, the corner of the outdoor-side inclined surface 331 at the lower end of the upper panel 3 and the central horizontal plane 330 is located slightly indoors relative to the corner of the outdoor-side upper surface 320 at the upper end of the lower panel 3 and the outdoor-side inclined surface 321. When the upper panel 3 moves downward from this state relative to the lower panel 3, the outdoor-side inclined surface 331 of the upper panel 3 is guided by the outdoor-side inclined surface 321 of the lower panel 3, and the upper panel 3 moves outdoors relative to the lower panel 3, resulting in the state shown in Figure 19.

[0129] The right diagram of Figure 21 shows a state in which, when the adjacent panels 3 above and below are lowered, the upper panel 3 is slightly displaced toward the outdoors relative to the lower panel 3. When the shutter curtain 1 is displaced toward the outdoors when it is lowered, the lower outdoor facing surface 302 at the lower end abuts against the outdoor rising piece 303 at the upper end of the lower panel 3, so there is no further displacement toward the outdoors from the state shown in the right diagram of Figure 21. In the right diagram of Figure 21, the corner between the indoor side vertical surface 334 and the indoor side lower surface 335 at the lower end of the upper panel 3 is located slightly indoors of the corner between the indoor side inclined surface 323 and the indoor side vertical surface 324 at the upper end of the lower panel 3, and when the upper panel 3 moves downward from this state relative to the lower panel 3, the lower outdoor side visible surface 302 at the lower end is guided downward while sliding against the outdoor side rising piece 303 at the upper end of the lower panel 3, and the indoor side vertical surface 334 at the lower end of the upper panel 3 is guided downward while sliding against the indoor side vertical surface 324 of the lower panel 3, resulting in the state shown in Figure 19.

[0130] 19 shows a state in which the lower end portion of the upper panel 3 and the upper end portion of the lower panel 3 are fitted together (the shutter curtain 1 is in a fully closed position and is not in a vertically compressed state) from the state shown in the left diagram of FIG. 21. In FIG. 19, the outdoor-side rising piece 303 at the upper end portion of the lower panel 3 is close to the outdoor side of the lower outdoor-side visible surface 302 at the lower end portion of the upper panel 3 (the outdoor-side rising piece 303 is located at a step formed by the lower edge portion 301 and the lower outdoor-side visible surface 302), the outdoor-side lower surface 330 of the lower surface portion 33 at the lower end portion of the upper panel 3 is close to the outdoor-side upper surface 320 of the upper surface portion 32 at the upper end portion of the lower panel 3 (separated and not in contact in this embodiment), and the outdoor-side inclined surface 331 of the lower surface portion 33 at the lower end portion of the upper panel 3 is close to the outdoor-side inclined surface 321 of the upper surface portion 32 at the upper end portion of the lower panel 3 (separated and not in contact in this embodiment), and the outdoor-side lower surface 330 of the lower surface portion 33 at the lower end portion of the upper panel 3 is close to the outdoor-side upper surface 320 of the upper surface portion 32 at the upper end portion of the lower panel 3 (separated and not in contact in this embodiment). The buffer / airtight member 15 provided on the central horizontal surface 332 of the lower surface portion 33 at the end portion abuts against the central horizontal surface 322 of the upper surface portion 32 at the upper end portion of the lower panel 3, the indoor side inclined surface 333 of the lower surface portion 33 at the lower end portion of the upper panel 3 is close to the indoor side inclined surface 323 of the upper surface portion 32 at the upper end portion of the lower panel 3 (separated and non-contacting in this embodiment), the indoor side vertical surface 334 of the lower surface portion 33 at the lower end portion of the upper panel 3 is close to the indoor side of the indoor side vertical surface 324 of the upper surface portion 32 at the upper end portion of the lower panel 3, and the indoor side lower surface 335 of the lower surface portion 33 at the lower end portion of the upper panel 3 abuts against the elastic water-stopping member 16 (upper surface 164) provided on the indoor side of the upper end portion of the panel 3 of the lower panel 3. The panels 2, 3, and 4 according to this embodiment are assembled from surface materials made of steel plates of a predetermined shape, which has the disadvantage of making it difficult to achieve precision compared to panels made of aluminum. In this embodiment, the interlocking structure described above is employed to prevent rattling between the panels due to precision errors and the like. Furthermore, the lower end portion of the upper panel and the upper end portion of the lower panel are tightly attached via the buffer / airtight member 15, which functions as a damper. This ensures tight contact between the panels even if there are precision errors, allowing the downward pressing force of the vertical compression mechanism 7 to be effectively applied downward.

[0131] 20 shows the state in which vertical pressure is applied to the state shown in FIG. 19. In FIG. 20, the outdoor-side rising piece 303 at the upper end of the lower panel 3 is close to the outdoor side of the lower outdoor-side visible surface 302 at the lower end of the upper panel 3 (the outdoor-side rising piece 303 is located at a step formed by the lower edge 301 and the lower outdoor-side visible surface 302), the outdoor-side lower surface 330 of the lower surface portion 33 at the lower end of the upper panel 3 is in contact with the outdoor-side upper surface 320 of the upper surface portion 32 at the upper end of the lower panel 3, the outdoor-side inclined surface 331 of the lower surface portion 33 at the lower end of the upper panel 3 is close to the outdoor-side inclined surface 321 of the upper surface portion 32 at the upper end of the lower panel 3 (they are spaced apart and not in contact in this embodiment), and the central horizontal position of the lower surface portion 33 at the lower end of the upper panel 3 is The cushioning and airtight member 15 provided on the surface 332 is crushed between the central horizontal plane 322 of the upper surface portion 32 at the upper end of the lower panel 3, the indoor side inclined surface 333 of the lower surface portion 33 at the lower end of the upper panel 3 is close to the indoor side inclined surface 323 of the upper surface portion 32 at the upper end of the lower panel 3 (in this embodiment, they are separated and not in contact), the indoor side vertical surface 334 of the lower surface portion 33 at the lower end of the upper panel 3 is close to the indoor side of the indoor side vertical surface 324 of the upper surface portion 32 at the upper end of the lower panel 3, and the indoor side lower surface 335 of the lower surface portion 33 at the lower end of the upper panel 3 is pressing downward on the elastic water-stopping member 16 provided in the indoor side portion of the upper end of the panel 3 of the lower panel 3.

[0132] [C-5] Position of vertical reinforcement in shutter curtain As shown in Figures 3 and 8, five sets of vertical reinforcement units consisting of a first vertical reinforcement member 27, a second vertical reinforcement member 28, and a third vertical reinforcement member 29 are provided at intervals in the panel width direction within the top panel 2 of this embodiment. The vertical reinforcement units are continuous in the panel height direction (in this embodiment, they are continuous so as to overlap in the height direction via a horizontal reinforcement member). As shown in Figures 3 and 11, five sets of vertical reinforcement units consisting of a first vertical reinforcement member 37, a second vertical reinforcement member 38, and a third vertical reinforcement member 39 are provided at intervals in the panel width direction within the panel height direction (in this embodiment, they are continuous so as to overlap in the height direction via a horizontal reinforcement member). As shown in Figures 3 and 16, five sets of vertical reinforcement units consisting of a first vertical reinforcement member 47 and a second vertical reinforcement member 48 are provided at intervals in the panel width direction within the bottom panel 4 of this embodiment. The vertical reinforcement units are continuous in the panel height direction (in this embodiment, they are continuous so as to overlap in the height direction via a horizontal reinforcement member). The internal space of the top panel 2, panel 3, and bottom panel main body 4' according to this embodiment is divided into multiple spaces (rooms) by multiple horizontal reinforcing members and multiple vertical reinforcing members. This will be explained using panel 3 as a representative example. As shown in FIG. 11A (see FIGS. 11 and 13), the internal space of panel 3 is divided by intermediate horizontal reinforcing member 35 and lower horizontal reinforcing member 36 into an upper region between the top surface portion 32 and intermediate horizontal reinforcing member 35, an intermediate region between the intermediate horizontal reinforcing member 35 and lower horizontal reinforcing member 36, and a lower region between the lower horizontal reinforcing member 36 and the lower surface portion 33. The upper region is further divided into a first space 3A, a second space 3B, a third space 3C, a fourth space 3D, a fifth space 3E, and a sixth space 3F by five first vertical reinforcements 37 extending vertically at intervals in the width direction of the panel, the middle region is further divided into a seventh space 3G, an eighth space 3H, a ninth space 3I, a tenth space 3J, an eleventh space 3K, and a twelfth space 3L by five second vertical reinforcements 38 extending vertically at intervals in the width direction of the panel, and the lower region is further divided into a thirteenth space 3M, a fourteenth space 3N, a fifteenth space 3O, a sixteenth space 3P, a seventeenth space 3Q, and an eighteenth space 3R by five third vertical reinforcements 39 extending vertically at intervals in the width direction of the panel.Each first vertical reinforcement member 37 in the upper section has a 19th space 3a, a 20th space 3b, a 21st space 3c, a 22nd space 3d, and a 23rd space 3e formed therein. Each second vertical reinforcement member 38 in the middle section has a 24th space 3f, a 25th space 3g, a 26th space 3h, a 27th space 3i, and a 28th space 3j formed therein. Each third vertical reinforcement member 39 in the lower section has a 29th space 3k, a 30th space 3l, a 31st space 3m, a 32nd space 3m, and a 33rd space 3o formed therein. Among these 33 spaces, adjacent spaces are connected via at least one hole (hole 3710 in the first vertical reinforcement 37, hole 3810 in the second vertical reinforcement, drainage hole in the horizontal surface 350 of the middle horizontal reinforcement 35, and drainage hole in the horizontal surface 360 ​​of the lower horizontal reinforcement 36) or opening (opening 3910 below the third vertical reinforcement 39), allowing water to flow between the spaces. Holes 340, gaps 341, and openings 342 are formed in the side surface 34 of the panel 3 corresponding to each of the rooms 3A, 3G, 3M, 3F, 3L, and 3R (see FIG. 15). Holes or openings are formed in the underside 33 of the panel 3 corresponding to each of the rooms 3M, 3k, 3N, 3l, 3O, 3m, 3P, 3n, 3Q, 3o, and 3R. Water that has entered the interior of the panel 3 can be drained to the outside through the side portions 34 and bottom portion 33 of the panel 3, so that, for example, when the water subsides after rising, no water remains inside the panel 3. The above explanation of the structure of the panel 3 can be used to explain the top panel 2 and the bottom panel main body 4'.

[0133] As shown in Fig. 3, the vertical reinforcement units of the top panel 2, the vertical reinforcement units of the panel 3, and the vertical reinforcement units of the bottom panel 4 are aligned in the height direction. In this embodiment, three vertical compression mechanisms 7 are arranged at intervals in the opening width direction, and three compressed areas (compressed recesses 221 in this embodiment) are provided in the top panel 3 to correspond to the three vertical compression mechanisms 7. Of the five sets of vertical reinforcement units in the top panel 2, the upper ends of the left and right vertical reinforcement units and the central vertical reinforcement unit are located in the compressed areas. With this configuration, each of the panels 2, 3, and 4 can resist the downward pressing force of the vertical compression mechanisms 7 and can effectively apply the pressing force downward.

[0134] [D]Water stop structure [D-1] Water-stopping structure between panels in a shutter curtain in a fully closed position When the shutter curtain 1 in the fully closed position is subjected to vertical compression, a watertight structure or a watertight structure is formed between the lower end portion of the top panel 2 and the upper end portion of panel 3, between the lower end portion of panel 3 and the upper end portion of panel 3, and between the lower end portion of panel 3 and the upper end portion of bottom panel 4.

[0135] Since the configuration of the lower end portion of the top panel 2 is the same as the configuration of the lower end portion of panel 3, and the configuration of the upper end portion of the bottom panel 4 is the same as the configuration of the upper end portion of panel 3, the water-stopping structure between the panels of the shutter curtain 1 in this embodiment will be explained based on the water-stopping structure of the adjacent panels 3 above and below in the shutter curtain 1 in the fully closed position.

[0136] In this embodiment, the water-stopping structure is formed in the indoor side portion of the shutter curtain 1 in the fully closed position. In the indoor side portion near the upper end of the panel 3, a groove is formed extending in the panel width direction from the indoor side vertical surface 324, the indoor side lower surface 325, and the indoor side rising piece 310, and a long elastic water-stopping member 16 is fitted in the groove. When the shutter curtain 1 is lowered, the elastic water-stopping member 16 of the lower panel 3 and the indoor side lower surface 335 of the upper panel 3 are spaced apart (see the left diagram in Figure 4), and when the shutter curtain 1 is in the fully closed position (non-vertical compression state), the indoor side lower surface 335 of the upper panel 3 abuts against the upper surface 164 of the elastic water-stopping member 16 of the lower panel 3 (see Figure 19). When the shutter curtain 1 in the fully closed position is brought into a vertically compressed state from the state shown in Figure 19, the upper surface 164 of the elastic water-stopping member 16 of the lower panel 3 is abutted against the indoor side lower surface 335 of the upper panel 3, and the elastic water-stopping member 16 is pressed downward, causing the pressed elastic water-stopping member 16 to close the gap between the lower end portion of the panel 3 and the indoor side portion of the upper end portion of the panel 3, thereby forming a water-stopping structure (see Figure 20).

[0137] The groove formed in the indoor side portion near the upper end of the panel 3 has a roughly U-shaped cross section, consisting of the bottom (indoor side lower surface 325), the inner surface of the outer facing piece (indoor side rising piece 310) rising from the outer end of the bottom (indoor side lower surface 325), and a first portion 3240 facing the outer facing piece (indoor side rising piece 310) of the inner facing surface (indoor side vertical surface 324) located inside the bottom (indoor side lower surface 325), and the inner facing surface (indoor side vertical surface 324) has a second portion 3241 adjacent to the first portion 3240 and located outside the groove (above the first portion 3240 and above the upper end of the outer facing piece (indoor side rising piece 310)).

[0138] 24 and 25, the elongated elastic water-stopping member 16 fitted into a groove extending in the panel width direction is integrally formed of a hard elastic portion 16A located within the groove and a soft elastic portion 16B located outside the groove. In other words, the soft elastic portion 16B is integrally formed on a base (foundation) formed by the hard elastic portion 16A. In this embodiment, the hard elastic portion 16A is formed from flame-retardant rubber (chloroprene rubber, etc.), and the soft elastic portion 16B is formed from flame-retardant rubber sponge (chloroprene rubber sponge, etc.), but these materials are merely examples and are not limiting. In this embodiment, the elastic water-stopping member 16 is integrally formed from a hard elastic portion 16A located within the groove portion and a soft elastic portion 16B located outside the groove portion, thereby preventing as much as possible the deformation of the base (foundation) of the elastic water-stopping member 16 within the groove portion when the panel's own weight or vertical pressure is applied, and maintaining the shape of the base (foundation) of the elastic water-stopping member 16.

[0139] 24, the hard elastic portion 16A has a bottom surface 160, an inner facing surface 161, an outer facing surface 162, and a connecting surface (upper surface) 163, and the soft elastic portion 16B has an abutting surface (upper surface) 164, an inner facing surface 165, an outer facing surface 166, and a connecting surface (lower surface) 167 that comes into close contact with the connecting surface (upper surface) 163. Note that in the description of the elastic water-stopping member 16, the "inner surface" refers to the side closer to the indoor side vertical surface 324 when fitted into the groove, and the "outer surface" refers to the side farther from the indoor side vertical surface 324 when fitted into the groove.

[0140] The connection surface (upper surface) 163 of the hard elastic portion 16A consists of a first horizontal surface 1630 and a first inclined surface 1631 that inclines from the outside of the first horizontal surface 1630 toward the bottom surface 160, and the connection surface (lower surface) 167 of the soft elastic portion 16B consists of a second horizontal surface 1670 and a second inclined surface 1671 that inclines from the outside of the second horizontal surface 1670 away from the top surface 164, and the first horizontal surface 1630 and the second horizontal surface 1670, and the first inclined surface 1631 and the second inclined surface 1671 are in close contact with each other.

[0141] The top surface of the elastic water-stopping member 16 is formed by the top surface 164 of the soft elastic portion 16B, and the bottom surface of the elastic water-stopping member 16 is formed by the bottom surface 160 of the hard elastic portion 16A. The inner facing surface 161 of the hard elastic portion 16A and the inner facing surface 165 of the soft elastic portion 16B are flush with each other, and the inner facing surface 161 of the hard elastic portion 16A and the inner facing surface 165 of the soft elastic portion 16B form the inner facing surface of the elastic water-stopping member 16.

[0142] A plurality of (four in the illustrated embodiment) protrusions 1610 extending in the panel width direction are formed on the inner facing surface 161 of the hard elastic portion 16A. That is, the inner facing portion of the hard elastic portion 16A is made up of the inner facing surface 161 and the plurality of protrusions 1610 formed on the inner facing surface 161 and extending in the panel width direction.

[0143] The outer facing surface 166 of the soft elastic portion 16B is composed of a first portion 1660 on the bottom surface 160 side and a second portion 1661 on the abutment surface (top surface) 164 side. As described below, the outer facing surface 166 of the soft elastic portion 16B is composed of the first portion 1660 that is in close contact with the inner surface of the outer facing piece (the indoor-side rising piece 310) and the second portion 1661 that is located outside the groove. The outer facing portion 162 of the hard elastic portion 16A is composed of a protruding piece 1620 that protrudes at an angle away from the bottom surface 160 and a recessed portion 1621 adjacent to the upper side of the protruding piece 1620 and that allows elastic deformation of the protruding piece 1620. When no external force is applied to the elastic water-stopping member 16, the tip of the protruding piece 1620 is located slightly inside the outer facing surface 166 of the soft elastic portion 16B, but it may be approximately aligned.

[0144] 25, the hard elastic portion 16A of the elastic water-stopping member 16 is fitted into the groove, and most of the soft elastic portion 16B of the elastic water-stopping member 16 is located outside the groove (above the groove), with only the outer, lower portion located within the groove. When the elastic water-stopping member 16 is fitted into the groove, the bottom surface of the elastic water-stopping member 16 (bottom surface 160 of the hard elastic portion 16A) abuts against the bottom (indoor-side lower surface 325), and the inner facing portion of the hard elastic portion 16A abuts against a first portion 3240 of the inner facing surface of the groove (indoor-side vertical surface 324) via a protrusion 1610, and the outer facing portion 162 of the hard elastic portion 16A is in close contact with the inner surface of the outer facing piece (indoor-side rising piece 310) via a protrusion 1620.

[0145] An outer portion (1660) of the portion of the soft elastic portion 16B located within the groove is in close contact with the inner surface of the outer facing piece (indoor side rising piece 310). Specifically, the portion surrounded by the lower portion (first portion 1660) of the outer facing surface 166 of the soft elastic portion 16B and the second inclined surface 1671 is located within the groove, and the first portion 1660 of the outer facing surface 166 is in a crushed state (indicated by 1660') in close contact with the inner surface of the outer facing piece (indoor side rising piece 310).

[0146] The inner facing portion of the hard elastic portion 16A abuts against the first part 3240 of the inner facing surface of the groove portion (the indoor side vertical surface 324) via the protrusion 1610, and a force acts in the direction of pressing the elastic water-stopping member 16 against the inner surface of the outer facing piece (the indoor side rising piece 310), so that the first part 1660 of the outer facing surface 166 is in a crushed state (1660') and adheres closely to the inner surface of the outer facing piece (the indoor side rising piece 310), and the protrusion 1620 of the hard elastic portion 16A is in an upward elastically deformed state and its tip side is in adherence to the inner surface of the outer facing piece (the indoor side rising piece 310).

[0147] When the elastic water-stopping member 16 is fitted into the groove, the protrusion 1620 of the outer facing portion 162 of the hard elastic portion 16A extends at an angle away from the bottom surface 160, and the tip side is in close contact with the inner surface of the outer facing piece (the indoor side rising piece 310), thereby bracing the elastic water-stopping member 16 in the direction in which it would slip out of the groove, and preventing the elastic water-stopping member 16 from slipping out of the groove.

[0148] The inner visible surface 161 of the hard elastic portion 16A and the inner visible surface 165 of the soft elastic portion 16B are flush with each other, and in the non-vertical compression position, the inner visible surface 165 of the soft elastic portion 16B is in close proximity to (spaced apart in this embodiment and in a non-contact state with) the second portion 3241 of the inner visible surface of the groove portion (the indoor side vertical surface 324) (FIG. 25). In the vertical compression position, the hard elastic portion 16A is pressed in the height direction, so that the inner visible surface 165 comes into close contact with the second portion 3241 (FIG. 26).

[0149] When the elastic water-stopping member 16 is in the vertically compressed position, the indoor-side lower surface 335 of the upper panel 3 is pressed against the upper surface 164 of the elastic water-stopping member 16 of the lower panel 3, thereby forming a water-stopping structure in the indoor-side area between the lower end portion of the upper panel 3 and the upper end portion of the lower panel 3. Furthermore, as shown in Fig. 20, when the elastic water-stopping member 16 is in the vertically compressed position, the elastic water-stopping member 16 is pressed in the height direction, so that the lower end portion (area adjacent to the first portion 1660) of the second portion 1661 of the outer facing surface 166 of the soft elastic portion 16B is brought into close contact with the tip edge (upper edge) 3100 of the outer facing piece (indoor-side rising piece 310), thereby forming a water-stopping structure.

[0150] As shown in Figure 20, the inner visible surface 165 of the soft elastic portion 16B of the elastic water-stopping member 16 is in close contact with the second portion 3241, thereby sealing the gap between the elastic water-stopping member 16 and the inner visible surface (the indoor side vertical surface 324), and the bottom surface 160 of the elastic water-stopping member 16 is in close contact with the bottom surface (325) of the groove. Even if water seeps in from the interface between the groove and the elastic water-stopping member 16, the lower end portion (the portion adjacent to the first portion 1660) of the second portion 1661 of the outer visible surface 166 of the soft elastic portion 16B is in close contact with the tip edge (upper edge) 3100 of the outer visible piece (the indoor side rising piece 310), thereby preventing water from seeping in to the indoor side.

[0151] The second portion 1661 of the outer facing surface 166 is in a state (indicated by 1661') that bulges outward from the outer surface of the outer facing piece (the indoor side rising piece 310). It should be noted that the bulging shape of the second portion 1661 shown in FIG. 26 is one example, and that the bulging shape may differ depending on the way in which force is applied, etc. As will be described later, in a vertical compression or horizontal compression state, the bulging second portion 1661' of the outer facing surface 166 is adapted to come into close contact with the watertight rubber member 55.

[0152] [D-2] Water-stopping structure between the bottom panel body and the seat plate in a shutter curtain in a fully closed position When the shutter curtain 1 in the fully closed position is subjected to vertical compression, a water-stopping structure is formed in the bottom panel 4 between the bottom panel main body 4' and the movable seat plate 6. In this embodiment, the water-stopping structure is formed in the indoor side portion of the bottom panel 4 of the shutter curtain 1 in the fully closed position.

[0153] A groove is formed in the indoor side portion of the movable seat plate 6, extending in the length direction of the movable seat plate 6 (width direction of the bottom panel 4) from the indoor side portion of the bottom surface 60, the indoor side rising piece 62, and the indoor side visible surface 64, and an indoor side elastic water-stopping member 16β is fitted into the groove. When the shutter curtain 1 is lowered, the indoor side lower surface 431 of the lower end portion of the main body 4' and the elastic water-stopping member 16β provided in the groove on the indoor side of the movable seat plate 6 are separated (see Figure 22), and when the shutter curtain 1 is in the fully closed position (non-vertical compression state), the indoor side lower surface 431 of the lower end portion of the main body 4' abuts against the upper surface 164 of the elastic water-stopping member 16β (see Figure 22). When the shutter curtain 1 in the fully closed position is brought into a vertically compressed state from the state shown in Figure 22, the upper surface 164 of the elastic water-stopping member 16β is pressed downward with the indoor side lower surface 431 of the lower end portion of the main body 4' in contact with the upper surface 164 of the elastic water-stopping member 16β, and the pressed elastic water-stopping member 16β closes the gap between the lower end portion of the panel main body 4' and the indoor side portion of the movable seat plate 6, thereby forming a water-stopping structure (see Figure 28).

[0154] The groove formed in the indoor side portion of the upper end portion of panel 3 has a roughly U-shaped cross section, consisting of a bottom (the indoor side portion of bottom surface 60), the inner surface of the outer facing piece (indoor side rising piece 62) rising from the outer end of the bottom, and a first portion 640 facing the outer facing piece (indoor side rising piece 62) of the inner facing surface (indoor side facing surface 64) located on the inside of the bottom, and the inner facing surface (indoor side facing surface 64) has a second portion 641 adjacent to the first portion 640 and located outside the groove (above the first portion 640 and above the upper end of the outer facing piece (indoor side rising piece 62)).

[0155] As shown in Figures 24 and 27, the elongated elastic water-stopping member 16β fitted into a groove extending in the panel width direction (seat board width direction) is integrally formed of a hard elastic portion 16A located within the groove and a soft elastic portion 16B whose upper portion is located outside the groove. In other words, the soft elastic portion 16B is integrally formed on a base (foundation) formed by the hard elastic portion 16A. In this embodiment, the hard elastic portion 16A is formed from flame-retardant rubber (chloroprene rubber, etc.) and the soft elastic portion 16B is formed from flame-retardant rubber sponge (chloroprene rubber sponge, etc.), but these materials are merely examples and are not limiting. In this embodiment, the elastic water-stopping member 16 is integrally formed from a hard elastic portion 16A located within the groove portion and a soft elastic portion 16B located outside the groove portion, thereby preventing as much as possible the deformation of the base (foundation) of the elastic water-stopping member 16 within the groove portion when the panel's own weight or vertical pressure is applied, and maintaining the shape of the base (foundation) of the elastic water-stopping member 16.

[0156] The basic configuration of elastic water-stopping member 16β is similar to that of elastic water-stopping member 16, and can be described with reference to Fig. 24. As shown in Fig. 24, hard elastic portion 16A has a bottom surface 160, an inner facing surface 161, an outer facing surface 162, and a connecting surface (upper surface) 163, and soft elastic portion 16B has an abutting surface (upper surface) 164, an inner facing surface 165, an outer facing surface 166, and a connecting surface (lower surface) 167 that comes into close contact with connecting surface (upper surface) 163. Note that in the description of elastic water-stopping member 16, the "inner side" refers to the side closer to indoor facing surface 64 of movable seat panel 6 when fitted into the groove, and the "outer side" refers to the side farther from indoor facing surface 64 when fitted into the groove.

[0157] The connection surface (upper surface) 163 of the hard elastic portion 16A consists of a first horizontal surface 1630 and a first inclined surface 1631 that inclines from the outside of the first horizontal surface 1630 toward the bottom surface 160, and the connection surface (lower surface) 167 of the soft elastic portion 16B consists of a second horizontal surface 1670 and a second inclined surface 1671 that inclines from the outside of the second horizontal surface 1670 away from the top surface 164, and the first horizontal surface 1630 and the second horizontal surface 1670, and the first inclined surface 1631 and the second inclined surface 1671 are in close contact with each other.

[0158] The top surface of the elastic water-stopping member 16 is formed by the top surface 164 of the soft elastic portion 16B, and the bottom surface of the elastic water-stopping member 16 is formed by the bottom surface 160 of the hard elastic portion 16A. The inner facing surface 161 of the hard elastic portion 16A and the inner facing surface 165 of the soft elastic portion 16B are flush with each other, and the inner facing surface 161 of the hard elastic portion 16A and the inner facing surface 165 of the soft elastic portion 16B form the inner facing surface of the elastic water-stopping member 16.

[0159] A plurality of (three in the illustrated embodiment, see FIG. 27) protrusions 1610 extending in the panel width direction are formed on the inner facing surface 161 of the hard elastic portion 16A. That is, the inner facing portion of the hard elastic portion 16A is made up of the inner facing surface 161 and a plurality of protrusions 1610 formed on the inner facing surface 161 and extending in the panel width direction.

[0160] The outer facing surface 166 of the soft elastic portion 16B is composed of a first portion 1660 on the bottom surface 160 side and a second portion 1661 on the abutment surface (top surface) 164 side. As described below, the outer facing surface 166 of the soft elastic portion 16B is composed of the first portion 1660 that is in close contact with the inner surface of the outer facing piece (indoor-side rising piece 62) and the second portion 1661 that is located outside the groove. The outer facing portion 162 of the hard elastic portion 16A is composed of a protruding piece 1620 that protrudes at an angle away from the bottom surface 160 and a recessed portion 1621 adjacent to the upper side of the protruding piece 1620 and that allows elastic deformation of the protruding piece 1620. When no external force is applied to the elastic water-stopping member 16, the tip of the protruding piece 1620 is located slightly inside the outer facing surface 166 of the soft elastic portion 16B, but it may be approximately coincident.

[0161] 27, the hard elastic portion 16A of the elastic water-stopping member 16 is fitted into the groove, with the lower portion of the soft elastic portion 16B of the elastic water-stopping member 16 located inside the groove and the upper portion located outside (above) the groove. When the elastic water-stopping member 16 is fitted into the groove, the bottom surface of the elastic water-stopping member 16 (bottom surface 160 of the hard elastic portion 16A) abuts against the bottom portion (the indoor side portion of the bottom surface 60), and the inner facing portion of the hard elastic portion 16A abuts against a first portion 640 of the inner facing surface of the groove (indoor side facing surface 64) via a protrusion 1610. The outer facing portion 162 of the hard elastic portion 16A is in close contact with the inner surface of the outer facing piece (indoor side rising piece 62) via a protrusion 1620.

[0162] An outer portion (1660) of the portion of the soft elastic portion 16B located in the groove is in close contact with the inner surface of the outer facing piece (indoor side rising piece 62). Specifically, the lower portion of the soft elastic portion 16B is located in the groove, and a first portion 1660 of the outer facing surface 166 is in a crushed state (indicated by 1660') in close contact with the inner surface of the outer facing piece (indoor side rising piece 62).

[0163] The inner facing portion of the hard elastic portion 16A abuts against the first part 640 of the inner facing surface of the groove portion (indoor facing surface 64) via the protrusion 1610, and a force acts in the direction of pressing the elastic water-stopping member 16 against the inner surface of the outer facing piece (indoor rising piece 62), so that the first part 1660 of the outer facing surface 166 is in a crushed state (1660') and adheres closely to the inner surface of the outer facing piece (indoor rising piece 62), and the protrusion 1620 of the hard elastic portion 16A is in an upward elastically deformed state and its tip side is in adherence to the inner surface of the outer facing piece (indoor rising piece 62).

[0164] When the elastic water-stopping member 16 is fitted into the groove, the protrusion 1620 of the outer facing portion 162 of the hard elastic portion 16A extends at an angle away from the bottom surface 160, and the tip side is in close contact with the inner surface of the outer facing piece (the indoor side rising piece 62), thereby bracing the elastic water-stopping member 16β in the direction of slipping out of the groove, and preventing the elastic water-stopping member 16 from slipping out of the groove.

[0165] The inner facing surface 161 of the hard elastic portion 16A and the inner facing surface 165 of the soft elastic portion 16B are flush with each other, and in the non-vertical compression position, the inner facing surface 165 of the soft elastic portion 16B is in close proximity to (spaced apart in this embodiment and in a non-contact state with) the second portion 641 of the inner facing surface of the groove portion (the indoor facing surface 64) (FIG. 27). In the vertical compression position, the hard elastic portion 16A is pressed in the height direction, so that the inner facing surface 165 comes into close contact with the second portion 641 (FIG. 28).

[0166] When the elastic water-stopping member 16β is in the vertically compressed position, the indoor-side lower surface 431 of the bottom panel main body 4′ is pressed against the upper surface 164 of the elastic water-stopping member 16β provided in the indoor-side groove portion of the movable seat plate 6, thereby forming a water-stopping structure in the indoor-side area between the lower end portion of the bottom panel main body 4′ and the movable seat plate 6. Furthermore, as shown in Fig. 28, when the elastic water-stopping member 16β is in the vertically compressed position, the elastic water-stopping member 16β is pressed in the height direction, so that the lower end portion (area adjacent to the first portion 1660) of the second portion 1661 of the outer facing surface 166 of the soft elastic portion 16B is brought into close contact with the tip edge (upper edge) 620 of the outer facing piece (indoor-side rising piece 62), thereby forming a water-stopping structure.

[0167] As shown in Figure 28, the inner facing surface 165 of the soft elastic portion 16B of the elastic water-stopping member 16β is in close contact with the second portion 641, thereby sealing the gap between the elastic water-stopping member 16β and the inner facing surface (the indoor facing surface 64), and the bottom surface 160 of the elastic water-stopping member 16β is in close contact with the indoor portion of the bottom surface 60 of the groove. Even if water seeps in from the interface between the groove and the elastic water-stopping member 16β, the lower end portion (the portion adjacent to the first portion 1660) of the second portion 1661 of the outer facing surface 166 of the soft elastic portion 16B is in close contact with the tip edge (upper edge) 620 of the outer facing piece (the indoor rising piece 62), thereby preventing water from seeping in to the indoor side.

[0168] The second portion 1661 of the outer visible surface 166 is in a state (indicated by 1661') that bulges outward from the outer surface of the outer visible piece (indoor side rising piece 62). It should be noted that the bulging shape of the second portion 1661 shown in FIG. 28 is one example, and that the bulging shape may be different depending on how force is applied, etc. As will be described later, in a vertical compression or horizontal compression state, the bulging second portion 1661' of the outer visible surface 166 is adapted to come into close contact with the watertight rubber member 55.

[0169] A groove is formed in the outdoor portion of the movable seat plate 6, extending in the length direction of the movable seat plate 6 (width direction of the bottom panel 4) from the outdoor portion of the bottom surface 60, the outdoor rising piece 61, and the outdoor facing surface 63, and an outdoor elastic water-stopping member 16α is fitted into the groove. When the shutter curtain 1 is in the fully closed position, the outdoor lower surface 430 of the panel body 4' abuts against the outdoor elastic water-stopping member 16α, which will be described later in the explanation of the airtight structure.

[0170] [D-3] Water-stopping structure of the bottom end of the shutter curtain in the fully closed position When the shutter curtain 1 in the fully closed position is subjected to vertical compression, a waterproof structure is formed between the lower end portion of the bottom panel 4 (in this embodiment, the movable seat plate 6) and the floor surface. An elastic waterproof member 19 is provided across the entire width of the bottom surface 60 of the movable seat plate 6. As shown in FIG. 18, the elastic waterproof member 19 consists of end waterproof members 191 provided on the underside of both end portions of the bottom surface 60 of the movable seat plate 6, and two narrow intermediate waterproof members 190 provided on the underside of the middle portion (in the width direction) of the bottom surface 60 and in close contact with the end waterproof members 191. The elastic waterproof members 19 are fixed to the bottom surface 60 of the seat plate 6 with screws.

[0171] In this embodiment, a base elastic member 190' is provided on the bottom surface 60 of the movable seat panel 6, positioned between the end waterproofing members 191 on both ends, and a narrow intermediate waterproofing member 190 is fixed to the base elastic member 190'. The total thickness of the intermediate waterproofing member 190 and the base elastic member 190' is approximately the same as the thickness of the end waterproofing members 191, but in this embodiment, the lower surface of the narrow intermediate waterproofing member 190 bulges slightly downward in a cross-sectional view cut in the projection direction (see FIG. 22). In this embodiment, the base elastic member 190' is made of flame-retardant rubber (such as chloroprene rubber), and the end waterproofing members 191 and the intermediate waterproofing member 190 are made of flame-retardant rubber sponge (such as chloroprene rubber sponge) that is softer than the base elastic member 190', but these materials are merely examples and are not limiting.

[0172] The end waterproofing members 191 and the base elastic member 190' at both ends have a projected dimension that is the same as the projected dimension of the bottom surface 60 of the seat panel 6 (the projected dimension of the bottom panel main body 4'), and the two narrow intermediate waterproofing members 190 are both provided so as to fit within the projected dimension of the bottom surface 60 of the seat panel 6. Of the two intermediate waterproofing members 190, the intermediate waterproofing member 190 located on the outdoor side extends between the end waterproofing members 191 at both ends at a position away from the outdoor-side facing piece 61 of the movable seat panel 6 toward the indoor side (inside). The intermediate waterproofing member 190 located on the indoor side extends between the end waterproofing members 191 at both ends at a position away from the indoor-side rising piece 62 of the movable seat panel 6 toward the outdoor side (inside).

[0173] The outdoor-side intermediate water-stopping member 190 is positioned inside the outdoor-side facing piece 61 of the movable seat plate 6, and the indoor-side intermediate water-stopping member 190 is positioned inside the indoor-side rising piece 62 of the movable seat plate 6, so that when the shutter curtain 1 is in the fully closed position, the intermediate water-stopping member 190 is not exposed to the outside, which improves the aesthetic appearance particularly when viewed from the outdoor side.

[0174] Since the narrow intermediate water-stopping member 190 has a small contact area with the floor surface, when pressed downward with the same force (the weight of the panel when in the normal fully closed position, or the pressing pressure when pressed vertically), the surface pressure pressing against the floor surface is greater than with a wide water-stopping member, and by adhering to the floor surface with greater force, the airtightness and waterproofing performance are improved.

[0175] When the shutter curtain 1 is in the fully closed position, the elastic water-stopping member 19 provided on the bottom surface 60 of the movable base plate 6 is actually designed to be in close contact with the upper surface 90 of the sill or door sill embedded in the floor surface FL, and the projected dimensions of the upper surface 90 are limited (see Figure 31). Here, when the shutter curtain 1 is in a vertically or horizontally compressed state, if water pressure acts on the shutter curtain 1 from the outdoor side toward the indoor side, the shutter curtain 1 may be deformed or displaced indoors. At this time, the elastic water-stopping member 19 will be displaced indoors relative to the upper surface 90 of the sill, but because the indoor-side intermediate water-stopping member 190 is located inside the indoor-side rising piece 62, the indoor-side intermediate water-stopping member 190 and the upper surface 90 of the sill will remain in close contact with each other even if the bottom panel 4 is displaced indoors (see Figure 31).

[0176] 30, at least a portion of the end waterproofing member 191 is located within the guide body 5 in the fully closed position. The outdoor-side portion of the end waterproofing member 191 is approximately flush with the outdoor-side facing piece 61 of the movable seat plate 6, and the indoor-side portion of the end waterproofing member 191 is approximately flush with the indoor-side rising piece 62 of the movable seat plate 6. As will be described later, in the vertical compression and horizontal compression states, the indoor-side portion of the end waterproofing member 191, together with the indoor-side rising piece 62 of the movable seat plate 6, is adapted to come into close contact with the watertight rubber member 55.

[0177] [D-4] Water-stopping structure at both ends of the width of the shutter curtain in the fully closed position As shown in Figures 5, 6, 29, and 30, the widthwise ends of the shutter curtain 1 (top panel 2, panel 3, bottom panel 4) in the fully closed position are received in the opening between the outdoor-side horizontal pressing member 82 and the indoor-side watertight rubber member 55, and the outdoor-side peripheral surfaces of the guide rollers 11 at the tips of the support shafts 10 protruding from the widthwise ends are in contact with or close to the guide members 53 provided on the bottom side of the guide body 5. As the chain is moved up and down, each panel moves vertically up and down, with the outdoor-side peripheral surfaces of the guide rollers 11 of the support shafts 10 at both widthwise ends being guided by the guide members 53 and the widthwise ends being guided by the watertight rubber members 55, while the outdoor-side peripheral surfaces of the guide rollers 11 contact the guide members 53, restricting contact between the metal horizontal pressing member 82 and the widthwise ends of the shutter curtain 1 during normal opening / closing and the normal fully closed state.

[0178] By pressing the end of the shutter curtain 1, which is in a fully closed position (vertical compression state), toward the indoor side using the horizontal pressing member 82, the widthwise end of the indoor side portion of the shutter curtain 1 (indoor side visible surfaces 21, 31, 41, indoor side rising piece 62, elastic water-stopping member 16, elastic water-stopping member 16β, end water-stopping member 191 of elastic water-stopping member 19) is pressed against the watertight rubber member 55, resulting in a water-stopping structure that extends in the height direction at both ends of the shutter curtain in the width direction (see Figures 7 and 30).

[0179] When the shutter curtain 1 in the fully closed position is subjected to vertical compression, the portion of the elastic water-stopping member 16 and the elastic water-stopping member 16β exposed to the indoor side (second portion 1661 of the outer facing surface 166) bulges slightly indoors (1661') relative to the indoor side facing surfaces 21, 31, 41 and the indoor side rising piece 62 (see Figure 7), increasing the degree of adhesion with the watertight rubber member 55. The indoor side facing surface of the end water-stopping member 191 at the widthwise end of the elastic water-stopping member 19 is flush with the indoor side facing surface 41 and the indoor side rising piece 62 of the seat panel 6, and is in close contact with the watertight rubber member 55 together with the indoor side facing surface 41 and the indoor side rising piece 62 of the seat panel 6.

[0180] [D-5] Water-stopping structure of the entire shutter curtain in both vertical and horizontal compression states When the shutter curtain is in a vertically compressed state, the elastic water-stopping member 16 watertightly seals the gap between the upper and lower adjacent panels across the width, the elastic water-stopping member 16β watertightly seals the gap between the bottom panel main body 4' and the seat board 6 across the width, and the elastic water-stopping member 19 watertightly seals the gap between the lower end of the bottom panel 4 (the lower end of the seat board 6) and the floor. When the shutter curtain 1 in a vertically compressed state is further compressed horizontally and enters a horizontally compressed state, the widthwise ends of the indoor side part of the shutter curtain 1 (indoor side visible surfaces 21, 31, 41, indoor side rising piece 62, elastic water-stopping member 16, elastic water-stopping member 16β, end water-stopping member 191 of elastic water-stopping member 19) are pressed against the watertight rubber member 55, watertightly sealing both ends of the opening widthwise. When the shutter curtain is in this compressed state (vertical compression state and horizontal compression state), the space between the upper and lower panels is sealed watertight, and water-stopping lines are formed on three sides of the shutter device (both widthwise ends of the shutter curtain 1 located within the left and right guide bodies 5 and the bottom end of the shutter curtain) to prevent water from entering the indoor space.

[0181] [D-5] Water-resistant structure of the surface of the bottom panel body The waterproof panel shutter of this embodiment is equipped with an obstacle detection means consisting of a movable seat plate 6 and a detection switch SW at the lower end of the bottom panel 4. When the movable seat plate 6 at the lower end of the bottom panel 4 lands on the floor or abuts against an obstacle and moves upward a predetermined distance relative to the floor, the detection switch SW turns ON and an obstacle detection signal is sent to the control unit of the opening / closing device M via the cord reel CR, causing the shutter curtain 1 to stop moving downward. As shown in Figure 1, the opening / closing device M is provided in the shutter storage space above the opening, near one end in the width direction, and the cord reel CR is arranged in the lintel above the opening, on the indoor side of the ascending / descending path of the shutter curtain 1, and the cord reel CR and the control unit of the opening / closing device M are electrically connected. The cable C1 of the cord reel CR is designed to extend downward along the indoor side of the shutter curtain 1 when the shutter curtain 1 is raised or lowered, and the lower end of the cable C1 is electrically connected to a relay cable C2 that passes through the lower part of the indoor facing surface 41 of the bottom panel main body 4', and the relay cable C2 extends inside the bottom panel main body 4' and is electrically connected to a cable C3 that extends from the detection switch SW.

[0182] 22 and 32, the relay cable C2 includes a first portion 110 located on the indoor side, a second portion 111 located on the bottom panel main body 4′, and a relay cable holder 112 located between the first portion 110 and the second portion 111. The relay cable holder 112 includes a horizontally elongated lid portion 113 having an outer shape larger than a through-hole formed in a lower portion of the indoor-side visible surface 41 of the bottom panel main body 4′, and an insertion portion 114 to be inserted into the through-hole, with a hole 1130 formed in the lid portion 113, and a disk-shaped abutment body (rubber bushing) 115 larger than the hole 1130 and having approximately the same dimensions as the inner diameter of the insertion portion 114 provided on the base end side of the internal space of the insertion portion 114 so as to block the hole 1130 from the inside, and the relay cable C2 is inserted into the abutment body 115. An insertion portion for the relay cable C2 is formed from a hole 1130 in the cover portion 113 and the internal space of the insertion portion 114. The relay cable C2 passes through the internal space of the insertion portion 114 and extends into the inside of the bottom panel main body 4'. A terminal 116 for electrical connection with the cable C1 is provided on the first portion 110, and a terminal 117 for electrical connection with the cable C3 is provided on the second portion 111.

[0183] In the waterproof panel shutter of this embodiment, a water stop line is formed on the indoor side of the shutter curtain 1 when it is in the fully closed position, so water is allowed to enter the inside of the bottom panel main body 4', and it is necessary to prevent water that has entered the inside of the bottom panel main body 4' from entering the indoor side through the penetration part or relay cable C2.

[0184] As shown in FIG. 32 , the internal space of the insertion portion (the space surrounded by the wall surface of the insertion portion and the second surface of the abutting body) is filled with caulking material 118 so as to surround the relay cable C2. A waterproofing treatment using a rubber packing 119 is provided between the inner surface of the lid portion 113 and the indoor-side facing surface 41 around the through-hole. The relay cable C2 is fixed to a liner 120 provided on the back surface of the facing material that forms the indoor-side facing surface 41 with screws (not shown) while the lid portion 113 abuts against the indoor-side facing surface 41 via the rubber packing 119. The rubber packing 119 prevents water from seeping outdoors through a gap between the lid portion 113 and the penetration portion formed in the indoor-side facing surface 41 of the bottom panel main body 4′, and the caulking material 118 prevents water from seeping outdoors along the relay cable C2. The first part 110 and terminal 116 located on the indoor side of the relay cable C2, and the lid portion 113 of the relay cable holder 112 are accommodated inside a cover 121 that is attached to the indoor side visible surface 41 in an openable / closable or detachable manner, and the cable C1 extends to the outside through a hole formed in the cover 121 (see Figure 33).

[0185] [E] Airtight structure (smokeproof structure) and bayonet structure (fireproof structure) The waterproof shutter of this embodiment can be used as a so-called management panel shutter, and functions as a fire and smoke shutter when a building opening is normally closed. The panels 2, 3, and 4 that make up the shutter curtain 1 are made of steel panels (assembled from steel or stainless steel plates, e.g., 1.5 mm or more thick). The base plate 6 and guide body 5 are also made of steel plates (steel or stainless steel), improving fire resistance. When the shutter curtain 1 is fully closed, a cradle structure is formed between the lower portion of the upper panel and the upper portion of the lower panel of adjacent panels. Furthermore, in order to function as a fire and smoke shutter in the normally closed state, the shutter is equipped with an airtight structure to prevent smoke and flames from entering the indoor side during a fire. The airtight structure of this embodiment can also prevent smoke and flames from escaping from the indoor side during a fire.

[0186] [E-1] Airtight structure between panels in a shutter curtain in a fully closed position When the shutter curtain 1 is in a fully closed state, an airtight structure is formed between the lower end portion of the top panel 2 and the upper end portion of panel 3, between the lower end portion of panel 3 and the upper end portion of panel 3, and between the lower end portion of panel 3 and the upper end portion of bottom panel 4. Since the configuration of the lower end portion of the top panel 2 is the same as the configuration of the lower end portion of panel 3, and the configuration of the upper end portion of the bottom panel 4 is the same as the configuration of the upper end portion of panel 3, the airtight structure between panels of the shutter curtain 1 according to this embodiment will be described based on the airtight structure of the vertically adjacent panels 3 in the shutter curtain 1 in the fully closed position.

[0187] As shown in Figure 14, at the lower end of the panel 3, airtight members are provided continuously across the entire width of the panel, consisting of a buffer / airtight member 15, left and right end lower airtight members 18 that are tightly attached to both longitudinal ends of the buffer / airtight member 15, and left and right end room outer airtight members 17 that are tightly attached to the outdoor side of the left and right end lower airtight members 18.

[0188] As shown in FIG. 19, when the shutter curtain 1 is in the fully closed state, in a cross-sectional view of the widthwise intermediate portion of the panel 3, the outdoor-side rising piece 303 at the upper end portion of the lower panel 3 is close to the outdoor side of the lower outdoor-side visible surface 302 at the lower end portion of the upper panel 3 (the outdoor-side rising piece 303 is located at a step formed by the lower edge portion 301 and the lower outdoor-side visible surface 302), the outdoor-side lower surface 330 of the lower surface portion 33 at the lower end portion of the upper panel 3 is close to the outdoor-side upper surface 320 of the upper surface portion 32 at the upper end portion of the lower panel 3 (separated and not in contact in this embodiment), and the outdoor-side inclined surface 331 of the lower surface portion 33 at the lower end portion of the upper panel 3 is close to the outdoor-side inclined surface 321 of the upper surface portion 32 at the upper end portion of the lower panel 3 (separated and not in contact in this embodiment). In this state, the buffer / airtight member 15 provided on the central horizontal surface 332 of the lower surface portion 33 at the lower end of the upper panel 3 abuts against the central horizontal surface 322 of the upper surface portion 32 at the upper end of the lower panel 3, but at both widthwise ends of the panel 3, the end lower airtight member 18 at the lower end of the upper panel 3 is in close contact with the outdoor-side upper surface 320 and the outdoor-side inclined surface 321 of the upper surface portion 32 at the upper end of the lower panel 3, and the left and right end room outer airtight members 17 are positioned outside the panel widthwise edges 3030 of the outdoor-side rising pieces 303 (see Figure 36), and the outer surfaces of the end room outer airtight members 17 are approximately flush with the main surface portion 300 of the outdoor-side visible surface 30 of the panel 3 and the outer surfaces of the outdoor-side rising pieces 303 (in this embodiment, they are positioned slightly toward the outdoor side) (see Figures 15 and 36).

[0189] [E-2] Airtight structure between the bottom panel body and the seat plate in a shutter curtain in the fully closed position When the shutter curtain 1 is in the fully closed state, an airtight structure is formed in the bottom panel 4 between the bottom panel main body 4' and the movable seat plate 6. In this embodiment, the airtight structure is formed in the outdoor portion of the bottom panel 4 of the shutter curtain 1 in the fully closed position. As shown in FIG. 23 , in the outdoor portion of the movable seat plate 6, a groove is formed extending in the length direction of the movable seat plate 6 (width direction of the bottom panel 4) from the outdoor portion of the bottom surface 60, the outdoor-side rising piece 61, and the outdoor-side facing surface 63, and an outdoor-side elastic water-stopping member 16α is fitted in the groove. When the shutter curtain 1 is in the fully closed position, the outdoor-side lower surface 430 of the panel main body 4' abuts against the upper surface of the outdoor-side elastic water-stopping member 16α, thereby forming an airtight structure across the entire width between the bottom panel main body 4' and the movable seat plate 6.

[0190] [E-3] Airtight structure of the bottom end of the shutter curtain in the fully closed position When the shutter curtain 1 is fully closed, an airtight structure is formed between the lower end portion of the bottom panel 4 (in this embodiment, the movable seat plate 6) and the floor. An elastic water-stopping member 19 is provided across the entire width on the bottom surface 60 of the movable seat plate 6, and the elastic water-stopping member 19 abuts against the floor surface due to the weight of the shutter curtain 1, thereby also functioning as an airtight member (see Figure 23).

[0191] [E-4] Airtight structure at both ends of the width of the shutter curtain in the fully closed position As shown in Figures 5 and 34, the widthwise end of the shutter curtain 1 (top panel 2, panel 3, bottom panel 4) in the fully closed position is received in the opening between the horizontal pressing member 82 on the outdoor side and the watertight rubber member 55 on the indoor side, and the outdoor side peripheral surface of the guide roller 11 at the tip of the support shaft 10 protruding from the widthwise end is in contact with or close to the guide member 53 provided on the bottom side of the guide body 5.

[0192] As shown in Figures 5 and 34 to 36, a smoke blocking material 56 is provided along the height direction at the tip of the outdoor-side folded piece 500 of the guide body 5. The smoke blocking material 56 is configured to be in continuous contact along the height direction with both width direction end portions of the panel on the outdoor side surface of the shutter curtain 1 in the fully closed position (portions located outside the guide body 5). More specifically, the widthwise end portions of the panel on the outdoor side surface of the shutter curtain 1 in the fully closed position are made up of the end room outer airtight member 17 attached to the main surface 200 and the lower outdoor surface 202 of the outdoor facing surface 20 of the top panel 2, the end room outer airtight member 17 attached to the main surface 300 and the lower outdoor surface 302 of the outdoor facing surface 30 of the panel 3, the outdoor facing surface 40 of the bottom panel 4, the second portion 1661 (Fig. 23) which is the exposed surface of the widthwise end portions of the outdoor-side elastic water-stopping member 16α, the outdoor-side rising piece 61 of the movable seat plate 6, and the outdoor portion of the end water-stopping member 191 of the elastic water-stopping member 19. In one embodiment, even when the shutter curtain 1 in the fully closed position is displaced indoors by horizontal pressure, contact between the smoke blocking material 56 and the widthwise end portions of the panel on the outdoor side surface of the shutter curtain 1 is maintained (see Fig. 6).

[0193] An upper smoke blocking material 56' is provided in the lintel portion 130 above the opening across the width of the opening, and the upper smoke blocking material 56' is in contact with the outdoor facing surface 20 of the top panel 2, and both widthwise ends are in contact with the upper ends of the left and right smoke blocking materials 56. The lower ends of the left and right smoke blocking materials 56 are in contact with the floor surface FL. In this embodiment, in a plan view, the smoke blocking material 56 is formed by making a fire-resistant sheet into a bag shape, and the base end side is fixed to the tip end portion of the outdoor-side folded piece 500, and the curved tip end is in contact with both widthwise ends of the panel on the outdoor side of the shutter curtain 1, but the specific configuration of the smoke blocking material 56 is not limited.

[0194] [E-5] Airtight structure of shutter curtain in fully closed position (other embodiment 1) Referring to Figure 38, another embodiment of the airtight structure of a shutter curtain in a fully closed position will be described based on a panel 3. In this embodiment, an outdoor-side airtight member 17α is provided along the lower edge 301 at the upper end of the lower outdoor-side facing surface (step facing surface) 302 of the panel 3, across the entire width of the panel. When the shutter curtain is fully closed, the upper end of the outdoor-side rising piece 303 of the lower panel 3 is in close contact with the outdoor-side airtight member 17α at the lower end of the upper panel 3, thereby blocking the outdoor-side gap between the lower end of the upper panel 3 and the upper end of the lower panel 3 across the entire width of the panel. The outdoor-side portion of the outdoor-side airtight member 17α is substantially flush with the outdoor-side facing surface (main surface portion 300) of the panel 3 and the outdoor-side rising piece 303. Both widthwise end portions of the outdoor-side airtight member 17α are in contact with the left and right smoke barriers 56. In this embodiment, the outdoor-side airtight member 17α and the buffer / airtight member 15 are independent of each other.

[0195] [E-6] Airtight structure of shutter curtain in fully closed position (other embodiment 2) Referring to Figure 39, another embodiment of the airtight structure for a shutter curtain in the fully closed position will be described based on panel 3. In this embodiment, no stepped surface is formed below the outdoor-facing surface 30 of panel 3. A flat outdoor-side airtight member 17β is provided across the entire width of either the outdoor-side horizontal surface at the lower end of the upper panel 3 or the outdoor-side horizontal surface at the upper end of the lower panel 3. When the shutter curtain is fully closed, the outdoor-side airtight member 17β is pressed between the outdoor-side horizontal surface at the lower end of the upper panel 3 and the outdoor-side horizontal surface at the upper end of the lower panel 3, thereby blocking the outdoor-side gap between the lower end of the upper panel 3 and the upper end of the lower panel 3 across the entire panel width. The outdoor-side portion of the outdoor-side airtight member 17β is substantially flush with the outdoor-facing surface 30 of panel 3, and both widthwise end portions of the outdoor-side airtight member 17β are in contact with the left and right smoke barriers 56. In this embodiment, the outdoor-side airtight member 17α and the buffer / airtight member 15 are independent of each other.

[0196] [E-7] Interlocking structure between panels in a shutter curtain in the fully closed position In this embodiment, in the panels adjacent to the top and bottom of the shutter curtain 1 in the fully closed position, a water-stopping structure is formed between the indoor side portion of the lower part of the upper panel and the indoor side portion of the upper part of the lower panel, and a dogleg structure is formed between the lower part of the upper panel and the upper part of the lower panel, located on the outdoor side of the water-stopping structure. The dogleg structure between the adjacent panels 3 above and below of the shutter curtain 1 in this embodiment will be explained based on the fit of the adjacent panels 3 above and below in the shutter curtain 1 in the fully closed position. The lower surface portion 33 of the upper panel 3 has an outdoor-side lower surface (outdoor-side horizontal surface) 330, a trapezoidal portion in side view consisting of an outdoor-side inclined surface 331, a central horizontal surface 332, and an indoor-side inclined surface 333, and an indoor-side portion (indoor-side vertical surface 334, indoor-side lower surface 335), and the upper surface portion 32 of the lower panel 3 has an outdoor-side upper surface (outdoor-side horizontal surface) 320, a trapezoidal portion in side view consisting of an outdoor-side inclined surface 321, a central horizontal surface 322, and an indoor-side inclined surface 323, and an indoor-side portion (indoor-side vertical surface 324, indoor-side lower surface 325). When the shutter curtain is in the fully closed position, the lower end portion of the upper panel 3 and the upper end portion of the lower panel 3 form a dogleg structure by fitting together the trapezoidal portion (outdoor-side inclined surface 331, central horizontal surface 332, indoor-side inclined surface 333) of the lower surface portion 33 of the upper panel 3 and the trapezoidal portion (outdoor-side inclined surface 321, central horizontal surface 322, indoor-side inclined surface 323) of the upper surface portion 32 of the lower panel 3. In this embodiment, the dogleg structure is also formed by the outdoor-side rising piece 303 of the lower panel 3 closely facing the lower outdoor-side visible surface 302 of the upper panel 3. In this embodiment, the fire and smoke prevention performance is improved by the synergistic effect of the airtight structure and the dogleg structure.

[0197] [E-8] Operation as a fire shutter The waterproof shutter according to this embodiment is an electric shutter that, during normal operation, is electrically lowered to close the opening. When the opening is fully closed, as described above, an airtight structure (smoke-blocking structure) is formed in the outdoor portion, and a hook-and-loop structure (fire-resistant structure) advantageous for fire prevention is formed between adjacent panels above and below. When the opening is fully closed (uncompressed state), the vertical compression mechanism compresses the shutter curtain 1 in the fully closed position vertically, and the horizontal compression mechanism compresses the shutter curtain 1 in the fully closed position, which is in the vertically compressed state, horizontally, so that the shutter curtain 1 in the fully closed position is in a vertically and horizontally compressed state. Even in this state, the airtight structure (smoke-blocking structure) is maintained (see FIG. 6), and the hook-and-loop structure (fire-resistant structure) is maintained (see FIG. 20).

[0198] The waterproof shutter according to this embodiment is equipped with a gravity-lowering mechanism for lowering the shutter curtain 1 in a fully open state under its own weight in the event of a fire or other emergency. More specifically, as shown in FIG. 40 , the waterproof shutter includes an automatic closing device that is activated by the input of a fire detection signal and an operating mechanism that releases and resets the brake of the opening / closing device M. When the automatic closing mechanism is activated, the operating mechanism assumes a brake-released position, releases the brake, and allows the shutter curtain to descend under its own weight, eventually descending to the fully closed position and stopping in that position. When an obstacle strikes the seat plate 6 at the bottom of the shutter curtain 1 during its own weight descent, an obstacle detection signal is sent to the operating mechanism. In response to the input of the obstacle detection signal, the operating mechanism assumes a brake-reset position, resetting the brake and stopping the shutter curtain as it descends under its own weight. When the obstacle is removed, the input of the obstacle detection signal ceases, and the operating mechanism resumes its brake-released position, releasing the brake, allowing the shutter curtain to descend again under its own weight, eventually descending to the fully closed position and stopping in that position.

[0199] The following explains the compression operation after the shutter curtain has reached the fully closed position due to its own gravity. In the first mode, the presence or absence of a fire detection signal determines whether the shutter curtain has reached the fully closed position due to its own gravity or due to electrical descent. If the fire detection signal is "present," it is determined that the shutter curtain has reached the fully closed position due to its own gravity, and the transmission of the compression signal from the compression button is disabled, restricting the compression operation.

[0200] In the second mode, the compression operation is possible regardless of whether the shutter curtain in the fully closed position is lowered by gravity or electrically. When a vertical compression signal is sent from the compression button to the vertical compression mechanism, the vertical compression mechanism performs vertical compression of the shutter curtain in the fully closed position, and when a horizontal compression signal is sent from the compression button to the horizontal compression mechanism, the horizontal compression mechanism performs vertical compression of the shutter curtain in the fully closed position. [Explanation of symbols]

[0201] 1. Shutter Curtain 2 Top Panel 20 Outdoor facing surface 200 Main surface 202 Lower outdoor facing surface (step facing surface) 21 Indoor facing side 22 Top part 221 Compressed recess (compressed part) 23 Bottom part 230 Outdoor side bottom surface 231 Outdoor slope 232 Central horizontal plane 233 Indoor slope 234 Indoor vertical surface 235 Indoor side underside (pressed part) 25´ Upper horizontal stiffener 25 Intermediate horizontal reinforcement 26 Lower horizontal reinforcement 27 First vertical reinforcement 28 Second vertical reinforcement 29 Third vertical reinforcement 3 Middle Panel (Panel) 30 Outdoor facing surface 300 Main surface 302 Lower outdoor facing surface (step facing surface) 303 Outdoor side rising piece (projecting piece) 31 Indoor facing 310 Indoor side rising piece (outside groove piece, protruding piece) 32 Top part 320 Outdoor side top surface (outdoor side horizontal surface) 321 Outdoor slope 322 Central horizontal plane 323 Indoor slope 324 Indoor vertical surface (indoor facing surface, stepped indoor facing surface) 3240 1st part (groove) 3241 Part 2 325 Indoor side underside (bottom of groove) 33 Bottom part 330 Outdoor side lower surface (outdoor side horizontal surface) 331 Outdoor slope 332 Central horizontal plane 333 Indoor slope 334 Indoor vertical surface 335 Indoor side underside (pressed part) 35 Intermediate horizontal reinforcement 36 Lower horizontal reinforcement 37 First vertical reinforcement 38 Second vertical reinforcement 39 Third vertical reinforcement 4 Bottom Panel 4´ Bottom Panel Body 40 Outdoor facing surface 400 Outdoor side rising piece (projecting piece) 41 Indoor facing 410 Indoor side rising piece (outside groove piece, protruding piece) 42 Top part 420 Outdoor side top surface 421 Outdoor slope 422 Central horizontal plane 423 Indoor slope 424 Indoor vertical surface (indoor facing surface, stepped indoor facing surface) 425 Indoor side underside (bottom of groove) 43 Bottom part 430 Outdoor bottom (bottom of panel body) 431 Indoor side underside (underside of panel body) 47 First vertical reinforcement 48 Second vertical reinforcement 45 Intermediate horizontal reinforcement 46 Lower horizontal reinforcement 5 Guide body 55 Watertight rubber members (elastic members) 56 Smoke blocking material 56´ Upper smoke barrier 6 Movable seat plate 60 Bottom (the indoor side is the bottom of the groove) 61 Outdoor rising piece (outdoor part of seat board) 62 Indoor side rising piece (outside groove piece, protruding piece) 620 Tip edge (upper edge) 63 Outdoor facing surface 64 Indoor facing surface (inside facing surface) 640 1st part (groove) 641 Part 2 7 Vertical compression mechanism 8 Horizontal compression mechanism 15. Buffer / airtight member (first airtight member) 16 Elastic water-stopping material 16A Hard elastic part 16B Soft elastic part 160 bottom 161 Inside facing (inside facing part) 1610 Projection 162 Outside sight section 1620 Projection piece 163 Connection surface (first connection surface) 1630 1st horizontal plane 1631 1st slope 164 Abutted surface 165 Inside facing 166 Outer marking surface 1660 Part 1 1660´ First section crushed 1661 Part 2 1661´ The second part in a bulging state 167 Connection surface (second connection surface) 1670 2nd horizontal plane 1671 2nd slope 16α Elastic water-stopping material (elastic airtight material) 16β Elastic water-stop material 17 End room outer airtight member (second airtight member) 18 Lower end airtight member (third airtight member) 19 Elastic water-stopping material 190 Intermediate water-stopping member 191 End water-stopping member (lower end airtight member) SW Detection switch (obstacle detection switch) CR Cord Reel C1 Cord Reel Cable C2 Relay Cable C3 Cable extending from the detection switch 112 Relay cable holder 113 Lid 1130 Hole portion (part of second insertion portion) 114 Insertion section 118 Caulking material (second waterproofing treatment) 119 Rubber packing (first waterproofing treatment) 121 Cover

Claims

1. A shutter curtain made up of multiple panels, Left and right guide bodies that receive the width direction ends of the shutter curtain; In a shutter equipped with A protrusion is provided on one of the outdoor side of the lower end portion of the upper panel and the outdoor side of the upper end portion of the lower panel, and a step-detecting surface on which the protrusion is located when the shutter curtain is in a fully closed position is provided on the other, and the width dimension of the protrusion is shorter than the width dimension of the step-detecting surface, At least one of the lower end portion of the upper panel and the upper end portion of the lower panel of the adjacent panels is provided with an airtight member that is located on the indoor side of the protruding piece and is sandwiched in a pressed state in the gap between the lower end portion of the upper panel and the upper end portion of the lower panel to close the gap across the width of the panels when the shutter curtain is in a fully closed position. The widthwise end portions of the airtight member are provided at the widthwise end portions of the step facing surface, and are end airtight portions that are located outside the widthwise end edges of the protruding pieces when the shutter curtain is in a fully closed position and form a surface portion that is approximately flush with the outdoor facing surface of the shutter curtain, A smoke blocking material is provided only on the outdoor side of the guide body along the height direction of the guide body, In the outdoor portion of the shutter curtain in the fully closed position, the smoke blocking material is in contact with the outdoor facing surface of the shutter curtain and the airtight end portion, thereby forming an airtight end structure. Airtight shutter structure.

2. one of the lower end portion of the upper panel and the upper end portion of the lower panel is a convex portion, and the other is a concave portion; The airtight member includes a portion that is pressed between the convex portion and the concave portion when the shutter curtain is in a fully closed position. The airtight structure of the shutter according to claim 1.

3. The airtight member is provided in the recessed portion, The end airtight portions are provided at both widthwise end portions of the stepped surface formed on the outdoor side of the recessed portion. The airtight structure of the shutter according to claim 2.

4. The airtight member is a continuous airtight member extending across the entire width of the panel from a first airtight member extending in the panel width direction and a second airtight member forming the end airtight portion. The airtight structure of the shutter according to any one of claims 1 to 3.

5. The longitudinal end portions of the first airtight member and the left and right second airtight members form a continuous airtight member via the left and right third airtight members. The airtight structure of the shutter according to claim 4.

6. The first airtight member is located at a substantially central portion in the projection direction of the panel and extends in the panel width direction. The airtight structure of the shutter according to claim 4 or 5.

7. The shutter is a waterproof shutter, and when the shutter curtain is in a fully closed position, a watertight structure is formed at the indoor side of the lower end portion of the upper panel and the upper end portion of the lower panel. The airtight structure of the shutter according to any one of claims 1 to 6.

8. The width direction end of the shutter curtain is received in the guide body between the horizontal pressing member on the outdoor side and the watertight rubber member on the indoor side, When the shutter curtain in the fully closed position is displaced toward the indoor side by the horizontal pressing member, the end airtight structure is maintained, and a water stop line is formed at the indoor side portion of the shutter curtain in the fully closed position from the watertight structure and the watertight rubber member. The airtight structure of the shutter according to claim 7.

9. The bottom panel of the shutter curtain comprises a panel body and a seat plate provided at the lower end of the panel body, At least one of the panel body and the seat plate is provided with an elastic airtight member extending in the panel width direction, the elastic airtight member being located on the outdoor side of the opposing portion of the lower surface of the panel body and the seat plate, When the shutter curtain is in a fully closed position, the elastic airtight member closes the gap between the opposing portions, The outdoor portion of the seat plate and the elastic airtight member form a part of the outdoor facing surface of the shutter curtain, The lower end of the smoke-blocking material is in contact with the outdoor portion of the seat plate and the elastic airtight member. The shutter airtight structure according to any one of claims 1 to 8.

10. A lower end airtight member is provided on the outdoor side of the seat plate at the lower end of the shutter curtain, which seals the gap between the underside of the seat plate and the floor surface across the panel width when the shutter curtain is in a fully closed position. The outdoor portion of the seat plate and both widthwise end portions of the lower end airtight member form the outdoor facing surface of the shutter curtain, The lower end of the smoke-blocking material reaches the floor surface and contacts the outdoor portion of the seat plate and both widthwise end portions of the lower end airtight member. The shutter airtight structure according to any one of claims 1 to 9.

11. An upper smoke barrier is provided on the outdoor side above the opening, contacting the upper end of the outdoor facing surface of the shutter curtain over its entire width. The smoke shielding material is in contact with both widthwise end portions of the upper smoke shielding material. The shutter airtight structure according to any one of claims 1 to 10.

Images