Waterproof shutter

Abstract

To provide a waterproof shutter which includes fireproof and smokeproof performance.SOLUTION: In a waterproof shutter including a shutter curtain 1 constituted by a plurality of panels 2, 3, 4, in panels adjacent to each other vertically of the shutter curtain 1 in a fully closed posture, a water cut-off structure is formed between an indoor side portion of a lower side portion of an upper side panel and an indoor side portion of an upper side portion of a lower side panel. Between the lower side portion of the upper side panel and the upper side portion of the lower side panel, a shiplap structure is formed positioned on the outdoor side of the water cut-off structure.SELECTED DRAWING: Figure 19

Description

Technical Field

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

Background Art

[0002] In recent years, guerrilla heavy rains due to abnormal weather have frequently occurred, and in urban areas, rainwater inundation accidents have occurred in subway stations and building floors. There are cases where it is desired to install at the entrance of a building or the like in an emergency to prevent external water from inundating the building. Also, there are cases where it is desired to close the building opening in a water-stopping state to prevent inundation inside not only during guerrilla heavy rains but also in general.

[0003] As exemplified in Patent Document 1, a waterproof shutter that closes a building opening in a water-stopping state has been proposed. There are cases where such a waterproof shutter is desired to function as a fire and smoke prevention shutter. For example, when the waterproof shutter is used for normal opening and closing of a building opening as a panel shutter for combined management, it is desired to have fire and smoke prevention performance in the normal fully closed state of the opening. The shutter disclosed in Patent Document 1 does not satisfy the requirements as a fire prevention measure, and the water-stopping structure disclosed in Patent Document 1 cannot be adopted as it is.

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a waterproof shutter having fire prevention performance.

Means for Solving the Problems

[0005] The technical means adopted by the present invention are a shutter curtain composed of a plurality of steel panels, left and right guide bodies for receiving the widthwise end portions of the shutter curtain, obstacle detection means, In a waterproof panel shutter equipped with, In the panels adjacent to the top and bottom of the shutter curtain when it is in a fully closed position, a watertight structure is formed between the indoor side of the lower part of the upper panel and the indoor side of the upper part of the lower panel. Between the lower portion of the upper panel and the upper portion of the lower panel, a rabbet structure is formed, located on the outdoor side of the watertight structure. It's a waterproof shutter. In one embodiment, the waterproof panel shutter is an electric shutter. The obstacle detection means is not limited to a type provided on the base plate at the lower end of the shutter curtain, but also includes, for example, a type that uses a photoelectric sensor provided in the lower part of the opening.

[0006] In one embodiment, the lower portion of the upper panel of two adjacent panels is concave, and the upper portion of the lower panel is convex. The interlocking structure is formed when the concave portion and the convex portion fit together. In one embodiment, the lower portion comprises an outdoor horizontal surface, a trapezoidal portion in side view consisting of an outdoor inclined surface, a central horizontal surface, and an indoor inclined surface, and an indoor portion. The aforementioned upper portion comprises an outdoor horizontal surface, a trapezoidal portion in side view consisting of an outdoor inclined surface, a central horizontal surface, and an indoor inclined surface, and an indoor portion. The interlocking structure is formed when the trapezoidal parts fit together. An elastic water-sealing member is provided across the entire width of the panel on at least one of the indoor-facing portion of the lower portion and the indoor-facing portion of the upper portion.

[0007] In one embodiment, the waterproof shutter is provided with a vertical compression means that compresses the shutter curtain in a fully closed position vertically. In one embodiment, the waterproof shutter includes a horizontal compression means that compresses the shutter curtain from a vertically compressed state to a horizontally compressed state. In one embodiment, an elastic watertight member is provided across the entire width of the panel on at least one of the indoor-facing portion of the lower part of the upper panel and the indoor-facing portion of the upper part of the lower panel. The aforementioned interlocking structure is capable of allowing the elastic water-stopping member to be pressed by the vertical compression means. In one embodiment, a cushioning material extending in the panel width direction is provided on at least one of the lower portion of the upper panel and the upper portion of the lower panel that form the interlocking structure. When vertical compression is applied by the vertical compression means, the cushioning material and the elastic water-sealing member are pressed simultaneously.

[0008] In one embodiment, when the shutter curtain is fully closed and in a non-compressed state, a fire-resistant structure is formed by a rabbet joint structure formed between adjacent steel panels vertically. The fire-resistant structure is maintained when the shutter curtain is fully closed and under compression.

[0009] In one embodiment, when the shutter curtain is fully closed and not compressed, a smoke-blocking structure is formed on the outdoor side of the shutter curtain. The smoke-blocking structure is maintained when the shutter curtain is fully closed and under compression. In one embodiment, the smoke-blocking structure is composed of an airtight member and a smoke-blocking material. More specifically, at least one of the lower end portion of the upper panel and the upper end portion of the lower panel of adjacent panels is provided with an airtight member that, when the shutter curtain is fully closed, seals the gap between the lower end portion of the upper panel and the upper end portion of the lower panel across the panel width direction. At least both ends of the airtight member in the width direction form end airtight portions that make up the outdoor-facing surface of the shutter curtain. The outdoor portion of the guide body is provided with a smoke-blocking material that contacts the outdoor surface of the shutter curtain when it is fully closed, extending along the height of the guide body. In one embodiment, the bottom panel of the shutter curtain consists of a panel body and a base plate provided at the lower end of the panel body. An elastic airtight member (16α) extending in the width direction of the panel is provided on at least one of the panel body and the seat plate, located on the outdoor side of the portion of the lower surface of the panel body and the seat plate that faces each other. When the shutter curtain is in the fully closed position, the elastic airtight member seals the gap between the opposing parts. The outdoor portion of the seat plate and the elastic airtight member form the outdoor visible surface portion of the shutter curtain. The lower end of the smoke barrier is in contact with the outdoor portion of the seat plate and the elastic airtight member. In one embodiment, the lower end of the base plate of the shutter curtain is provided with a lower end airtight member (19) on the outdoor side portion that seals the gap between the lower surface of the base plate and the floor surface in the panel width direction when the shutter curtain is in the fully closed position. The outdoor-facing portion of the base plate and the portions (191) at both ends in the width direction of the lower end airtight member form the outdoor-facing visible surface portion of the shutter curtain. The lower end of the smoke barrier reaches the floor surface and is in contact with the outdoor side portion of the seat plate and both ends (191) in the width direction of the lower end airtight member. In one embodiment, an upper smoke barrier is provided on the outdoor side above the opening, which contacts the upper end of the outdoor-facing surface of the shutter curtain over its entire width. The upper smoke shield material is in contact with both ends in the width direction of the smoke shield material.

[0010] In one embodiment, a movable seat plate constituting an obstacle detection means is provided at the lower end of the shutter curtain. In one embodiment, the movable seat plate is made of steel, but it may also be made fireproof by covering the seat plate body, which is formed from an aluminum profile, with a steel plate. When a waterproof shutter is used as a control-type panel shutter for normal opening and closing of building openings, and especially when used as a fire-resistant shutter, it is required that an obstacle detection means be provided on the bottom plate at the lower end of the shutter curtain. In one aspect, the shutter curtain can be lowered by its own weight due to the operation of the automatic closing device, in response to the input of an obstacle detection signal by the obstacle detection means, the lowering of the shutter curtain during electric lowering or lowering by its own weight is stopped, in response to the disappearance of the obstacle detection signal by the obstacle detection means, the shutter curtain that has stopped during lowering by its own weight resumes lowering by its own weight. In one aspect, the shutter curtain that has been lowered by its own weight to the fully closed position is capable of a vertical pressing operation. In one aspect, the vertical pressing operation of the shutter curtain that has been lowered by its own weight to the fully closed position is restricted.

[0011] In one aspect, the water stop line of the waterproof shutter is located at the indoor side portion of the shutter curtain in the fully closed position, and water ingress into the panel interior is permitted, the bottom panel of the shutter curtain is provided with an obstacle detection switch, and the obstacle detection signal is transmitted to the outside of the bottom panel through a relay body that penetrates the surface material of the bottom panel from inside the bottom panel, and the insertion portion of the relay body on the indoor side facing surface of the bottom panel is waterproofed. In the case of an obstacle detection means provided on the seat plate, for example, in the case of a wired type, it is necessary to connect the detection switch in the bottom panel and the cord of the cord reel outside the panel and transmit the obstacle detection signal to the control unit (control panel). At this time, a hole for inserting the cord is formed on the indoor side facing surface of the bottom panel. However, when the water stop line of the waterproof shutter is located at the indoor side portion of the shutter curtain in the fully closed position and water ingress into the panel interior is permitted, if no countermeasures are taken, in the water stop structure formed by the shutter curtain in the fully closed position, there is a risk that water inside the panel will further enter the indoor side through the hole for inserting the cable or the cable. In this aspect, in a waterproof shutter provided with an obstacle detection device, by performing waterproof treatment on the insertion portion of the relay body in the surface material of the bottom panel (for example, the surface material forming the indoor-side facing surface), the waterproof performance of the bottom panel can be improved.

[0012] In one aspect, the relay body is a relay cable, and the terminal located inside the bottom panel of the relay cable is adapted to receive an obstacle detection signal from the obstacle detection switch, and a cable extending along the outdoor-side facing surface of the shutter curtain from a cord reel is electrically connected to the terminal located outside the bottom panel of the relay cable. Note that the obstacle detection signal may be transmitted as a wireless signal from the relay body. In one aspect, the relay cable includes a relay cable holder having an insertion portion and a lid portion. The insertion portion of the relay body is formed in the surface material of the bottom panel, and includes a first insertion portion into which the insertion portion of the relay cable is fitted, and a second insertion portion formed in the lid portion and the insertion portion for inserting the relay cable. By performing a first waterproof treatment on the gap between the lid portion and the surface material of the bottom panel, the first insertion portion is blocked. By performing a second waterproof treatment on the gap between the second insertion portion and the relay cable, the second insertion portion is blocked. In one aspect, the insertion portion of the relay body is provided in the surface material forming the indoor-side facing surface of the bottom panel. In one aspect, the first waterproof treatment is an elastic water-stop member (for example, a rubber packing) located between the opposing surfaces of the lid portion and the indoor-side facing surface of the bottom panel, and the lid portion of the relay cable holder presses the elastic water-stop member between the opposing surfaces of the lid portion and the indoor-side facing surface of the bottom panel, and is fixed to the indoor-side facing surface of the bottom panel by, for example, screws, thereby forming a waterproof structure between the lid portion and the indoor-side facing surface of the bottom panel. In one embodiment, the second waterproofing treatment is a sealant material filled into the gap between the insertion portion and the relay cable. In one embodiment, the second waterproofing treatment comprises an elastic bush (for example, a rubber bush) through which the relay cable is inserted and which closes the insertion portion formed in the lid from the inside, and a caulking material adjacent to the elastic bush that fills the gap between the insertion portion formed in the insertion portion and the relay cable. In one embodiment, the surface material of the bottom panel is provided with a cover that covers the portion of the relay cable located outside the bottom panel. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a shutter that combines fire-resistant and waterproof functions. [Brief explanation of the drawing]

[0014] [Figure 1] This is a front view of the waterproof shutter (fully closed position) according to this embodiment, as seen from the indoor side. [Figure 2] This is a vertical cross-sectional view of the 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 diagram shows a front view of the shutter curtain of the waterproof shutter according to this embodiment, as seen from the indoor side, and a diagram showing the vertical compression mechanism above the shutter curtain. [Figure 4] The figures show a vertical cross-sectional view of the shutter curtain and the vertical compression mechanism of the waterproof shutter according to this embodiment. The left figure shows the state before the shutter curtain is fully closed, 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] This is a cross-sectional view of the end of the panel shutter in the opening width direction when it is in the fully closed position (non-horizontal compression state), and is a partial enlargement of the upper part of Figure 34. [Figure 6] This is a cross-sectional view of the end of the panel shutter in the opening width direction when it is in the fully closed position (horizontally compressed state), and is a partial enlargement of the upper part of Figure 29. [Figure 7] This is a partial longitudinal cross-section of a panel shutter in its fully closed position (vertical compression state and horizontal compression state). [Figure 8] This diagram shows a top view and a front view of the top panel as seen from the indoor side, according to this embodiment. [Figure 9] This is a partial enlarged view of the top view in Figure 8. [Figure 10] This is a vertical cross-sectional view of the top panel according to this embodiment (viewed from direction A), with the left side being the outdoor side and the right side being the indoor side. [Figure 10A] This is a side view of the top panel according to this embodiment, with the left side being the indoor side and the right side being the outdoor side. [Figure 11] These are a top view and a front view of the panel (intermediate panel) according to this embodiment, as seen from the indoor side. [Figure 11A] This is a front view of the panel (intermediate panel) according to this embodiment, showing the space partitioned within the panel. [Figure 12] This is a partially enlarged view of the top view shown in Figure 11. [Figure 13] This is a vertical cross-sectional view (viewed from direction B) of the 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] These are a front view and a bottom view of the panel (intermediate panel) according to this embodiment, as seen from the outdoor side. [Figure 15] This is a side view of the panel (intermediate panel) according to this embodiment, with the left side being the indoor side and the right side being the outdoor side. [Figure 16] This is a front view of the bottom panel according to this embodiment, as seen from the indoor side. [Figure 17] This is a vertical cross-sectional view of the bottom panel according to this embodiment (viewed from direction C), with the left side being the outdoor side and the right side being the indoor side. [Figure 17A] This is a side view of the bottom panel according to this embodiment, with the left side being the indoor side and the right side being the outdoor side. [Figure 18] The lower end portion of the bottom panel (movable seat plate) according to this embodiment is shown; the upper figure is a front view, and the lower figure is a bottom view. [Figure 19]This is a magnified view of the central part of Figure 4, showing the state in which the lower end of the upper panel and the upper end of the lower panel fit together in the fully closed position and non-vertical compression state. [Figure 20] Figure 4, the right-hand diagram, is a magnified view of a portion of the diagram, showing the state in which the lower end of the upper panel and the upper end of the lower panel fit together in the fully closed position and vertical compression state. [Figure 21] The left diagram shows the upper and lower panels descending in a vertical position, the center diagram shows the upper panel displaced towards the indoor side relative to the lower panel during descent, and the right diagram shows the upper panel displaced towards the outdoor side relative to the lower panel during descent. [Figure 22] Figure 4 (left) is a magnified view of a portion of the diagram, showing the lower end of the bottom panel before implantation. [Figure 23] Figure 4 is a magnified view of a portion of the central diagram, showing the lower end of the bottom panel at the time of implantation (non-vertical compression state). [Figure 24] This is a diagram showing an elastic water-stopping member. [Figure 25] This figure shows the elastic waterproofing member fitted into the groove on the indoor side of the panel (a magnified view of the indoor side in Figure 4, left). [Figure 26] This shows the state in which the elastic water-stopping member fitted into the groove is vertically compressed when the position is fully closed, and is a partial enlarged view of the indoor side of Figure 20. [Figure 27] This figure shows the elastic water-stopping member fitted into the groove on the indoor side of the seat plate (non-pressed state), and is a magnified view of the indoor side portion in Figure 22. [Figure 28] This shows the state in which the elastic water-stopping member fitted into the groove is vertically compressed when the vehicle is in the fully closed position (partial enlargement of the outdoor side portion in the right diagram of Figure 4). [Figure 29] This is a cross-sectional view of the panel shutter in the fully closed position (horizontal compression state) according to this embodiment. The top 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 bottom figure is a bottom view of the seat plate. [Figure 30]This diagram shows the positional relationship between the elastic water-stopping member and the watertight rubber member installed across the width of the indoor side of the shutter curtain. [Figure 31] This is a longitudinal cross-sectional view of the lower portion, including the bottom panel, of the panel shutter in the fully closed position (vertical compression state and horizontal compression state) according to this embodiment. [Figure 32] This is a magnified view of a portion of Figure 22, showing the extension cable of the cord reel (the cover that houses the extension cable is not shown). [Figure 33] This is a magnified view showing the cord exit point of the cord reel on the indoor-facing surface of the bottom panel. [Figure 34] This is a cross-sectional view of the panel shutter in the fully closed position (non-horizontal compression state) according to this embodiment. 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 bottom view of the seat plate. [Figure 35] These are longitudinal cross-sectional views of the shutter curtain in its fully closed position (non-vertical compression state). The left figure is a longitudinal cross-sectional view of the middle section in the panel width direction, and the right figure is a longitudinal cross-sectional view of the end section in the panel width direction. [Figure 36] Figure 35 is a magnified view of a portion of the right-hand diagram. [Figure 37] This diagram shows the positional relationship between the airtight member installed across the width of the outdoor portion of the shutter curtain and the smoke-blocking material installed on the guide body. [Figure 38] This figure shows another embodiment of the airtight structure when the shutter curtain is in the fully closed position. [Figure 39] This figure shows yet another embodiment of the airtight structure when the shutter curtain is in the fully closed position. [Figure 40] This block diagram shows the operation flow of the waterproof shutter in the event of a fire according to this embodiment. [Modes for carrying out the invention]

[0015] [A] Panel shutter configuration The waterproof shutter according to this embodiment is composed of a panel shutter and has the basic structure of a panel shutter. 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 (sometimes abbreviated as "panel 2"), a plurality of intermediate panels 3 (hereinafter referred to as "panel 3"), and a bottom panel 4 (sometimes abbreviated as "panel 4") connected in the panel height direction. It should also be noted that in this specification, when referred to as "panel," it 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 body 4' (sometimes abbreviated as "panel body 4'" or "body 4'") and a movable seat plate 6 (sometimes abbreviated as "seat plate 6"). In addition to waterproof performance, the waterproof shutter according to this embodiment has fire-resistant and smoke-resistant performance, and each panel 2, 3, and 4 differs from conventional aluminum panels in that they are steel panels formed from steel, which has excellent heat resistance and fire resistance. The detailed configuration of each panel 2, 3, and 4, as well as the waterproof structure and fire- and smoke-proof structure of the waterproof shutter according to this embodiment, will be described in detail later. Note that in this specification, the terms "outdoor side" and "indoor side" are used not only to describe the locations on the "outdoor side" and "indoor side" of the opening opened and closed by the shutter curtain 1, but also to describe the relative positions of parts of the components.

[0016] The basic structure of a panel shutter will now be explained. Each panel 2, 3, and 4 constituting the shutter curtain 1 has a support shaft 10 with guide rollers 11 protruding from both ends in the width direction (see Figures 5 and 6). Each panel 2, 3, and 4 is connected to a chain (not shown) via the support shaft 10 and suspended, thereby forming the shutter curtain 1. The configuration 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] Guide bodies 5 are erected at both ends in the width direction of the building opening, and are designed to receive and guide both ends in the width direction of the vertically positioned shutter curtain 1. As shown in Figures 5 and 6, the guide body 5 is a structure that extends in the height direction of the opening, formed in a U-shape in cross-section from a first side wall 50 on the outdoor side, a second side wall 51 on the indoor side, and a bottom wall 52, which are spaced apart and facing each other. The ends of the first side wall 50 on the outdoor side and the second side wall 51 on the indoor side are formed with an outdoor-side bent piece 500 and an indoor-side bent piece 510 facing each other, and the ends in the width direction of the shutter curtain 1 (top panel 2, panel 3, bottom panel 4) are received in the opening groove between the 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 that extends vertically in the height direction and contacts and guides the outdoor-side circumferential surface of the guide roller 11. On the outer sides of the first side wall 50 on the outdoor side and the second side wall 51 on the indoor side, elongated fins 54 (for example, made of nylon) extending in the height direction are formed. 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 and indoor sides.

[0018] In the storage space above the opening, a sprocket 12 is provided at approximately the upper end of the upper extension 5' for winding a chain. The opening / closing mechanism M rotates the sprocket 12 to lift or extend the chain, thereby raising or lowering the shutter curtain 1 to open or close the building opening. The storage space for the shutter curtain 1 above the opening extends from above the opening toward the interior, and a storage rail 13 is provided in this storage space that extends in a gently downward sloping manner from the front (outdoor side) toward the rear (indoor side). By lifting the chain, panels 2 and 3 are transferred to the storage rail 13 via the sprocket 12, and guide rollers 11 are guided along the storage rail 13 as the panels are sequentially moved toward the rear of the storage space, and panels 2, 3, and 4 are held and stored in a state where they hang parallel to each other.

[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 operation from the opening and closing switches (not shown) in the switch boxes SB1 to SB3. When the opening is fully closed, pressing the open switch (not shown) rotates the sprocket 12 in the chain lifting direction by the opening / closing mechanism M, and the shutter curtain 1, which is in a vertical position in the fully closed state, rises as the chain rises, with both ends in the width direction guided by the vertical guide body 5, and is sequentially passed from the top panel 2 to the storage rail 13 that extends laterally from the upper extension 5' of the guide body 5, and is stored parallel in the storage space, and the opening is opened.

[0020] With the opening fully open, pressing the closing switch (not shown) and rotating the sprocket 12 in the chain payout direction by the opening / closing mechanism M causes the parallel-storage panels 2 and 3 to be pulled out sequentially from the rear (indoor side) to the front (outdoor side) of the storage space towards the sprocket 12, with the guide rollers 11 at both ends in the width direction being guided by the storage rail 13. As they pass the sprocket 12, they descend while being guided by the guide body 5, with each panel being vertically perpendicular to the other in the height direction, and the opening is closed.

[0021] When the shutter curtain 1 is lowered, the upper end of the lower panel and the lower end of the upper panel are separated in any two adjacent panels (top panel 2 and panel 3, two panels 3, panel 3 and bottom panel 4) (see Figure 4 left and Figure 21 left). When the shutter curtain is lowered, after the lower end of bottom panel 4 touches the ground, 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 come into at least partial contact in any two adjacent panels, resulting in a fully closed state (see Figure 4 center and Figure 19).

[0022] The bottom panel 4 of the shutter curtain 1 according to this embodiment consists of a bottom panel body 4' and a movable seat plate 6 provided at the lower end of the bottom panel body 4'. The first obstacle detection means consists of the movable seat plate 6 and a detection switch SW provided at the lower end of the bottom panel body 4'. When the movable seat plate 6 at the lower end of the bottom panel 4 touches the ground or comes into contact with an obstacle, and the movable seat plate 6 moves upward relative to it by a predetermined amount, the detection switch SW turns ON, and an obstacle detection signal is transmitted to the control unit of the opening / closing device M via a cord reel CR (wired type), causing the descending shutter curtain 1 to stop. The control unit has pre-set upper and lower limits for the shutter curtain 1. If an obstacle detection signal is received above the lower limit, it is determined that an obstacle was detected while the shutter curtain was descending, and the descending shutter curtain 1 is controlled to stop for, for example, 1 second, then reverse and rise for 1.5 seconds. If an obstacle detection signal is received below the lower limit, it is determined that the shutter curtain is in the fully closed position (on the floor FL), and the descent of the shutter curtain 1 is stopped without reversing and rising. Furthermore, the transmission of the obstacle detection signal is not limited to a wired system, but may also be wireless (for example, transmitted wirelessly by radio waves).

[0023] A photoelectric sensor 14, exemplified as a second obstacle detection means, is provided at a predetermined height from the floor in the lower part of the opening. In the illustrated configuration, four photoelectric sensors 14 are provided on the outdoor and indoor sides, respectively, at heights of 150 mm and 500 mm from the floor. The height positions of the photoelectric sensors 14 are illustrative and not limited. In this embodiment, if an obstacle is detected while the shutter curtain is descending, the descending shutter curtain stops for, for example, 1 second, then reverses and rises for 1.5 seconds.

[0024] While the basic configuration of the panel shutter has been described with reference to the drawings, the basic configuration of the panel shutter is well known to those skilled in the art, and further detailed explanation will be omitted. Furthermore, it should be noted that many variations and improvements of the panel shutter are known to those skilled in the art, and the configuration of the panel shutter applicable to the waterproof shutter according to the present invention is not limited to the illustrated form.

[0025] [B] Waterproof shutter configuration The panel shutter according to this embodiment functions as a waterproof shutter by providing a watertight structure to the shutter curtain 1 when it is fully closed. In this embodiment, the means for making the panel shutter watertight when it is fully closed consists of a vertical compression mechanism 7 that compresses the shutter curtain 1 in the fully closed state vertically downward, 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 configuration and operation of the vertical compression mechanism 7 and the horizontal compression mechanism 8 will be described below, but for further details on the configuration of the waterproof shutter, please refer to Patent Document 1.

[0026] [B-1] Vertical compression mechanism As shown in Figure 1, multiple vertical compression mechanisms 7 are provided in the storage space above the opening, extending in the direction of the opening width. As shown in Figures 3 and 4, the vertical compression mechanism 7 includes a power cylinder 70, which is exemplified as an actuator located in the storage space above the opening, and a pressing part (consisting of a link mechanism) 72 provided at the tip of the piston rod 71 of the power cylinder 70, which contacts and presses against the upper end of the top panel 2 in the fully closed state. When the opening is fully closed, the piston rod 71 is lowered, and the pressing part 72 is brought into contact with the upper end of the top panel 2 and pressed downwards, thereby vertically compressing the shutter curtain 1 in the fully closed state downwards.

[0027] When the shutter curtain 1, which is in the fully closed state, is subjected to vertical compression, an elastic water-sealing member (in this embodiment, elastic water-sealing member 16) extending across the entire width of the panel is pressed against the lower end of the upper panel and the upper end of the lower panel of two vertically adjacent panels (panel 2 and panel 3, panel 3 and panel 3, panel 3 and panel 4), thereby forming a water-sealing structure. An elastic water-sealing member (in this embodiment, indoor-side elastic water-sealing member 16β) extending across the entire width of the panel is pressed against the panel body 4' of the bottom panel 4 and the movable seat plate 6, thereby forming a water-sealing structure. An elastic water-sealing member (in this embodiment, elastic water-sealing member 19) extending across the entire width of the panel is pressed against the floor surface FL, thereby forming a water-sealing structure.

[0028] As shown in Figure 2, the vertical compression mechanism 7 is positioned to be offset to the outside side relative to the lifting path of each panel so as not to obstruct the lifting and lowering of each panel in the storage space above the opening. Therefore, in order to press the upper end of the top panel 2 in the fully closed state, the piston rod 71 of the power cylinder 70 protrudes diagonally downward, but the pressing part 72, which consists of a link mechanism, applies a pressing force in a vertical direction to the upper end of the top panel 2.

[0029] As shown in Figures 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 in 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, and the distance between the central vertical compression mechanism 7 and the right vertical compression mechanism 7 being the same. The number of vertical compression mechanisms 7 is not limited, and the appropriate number is selected according to 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 includes a first limit switch and a second limit switch. When the vertical compression mechanism 7 is not operating, the movable part 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 protrudes to a predetermined compression position, the first limit switch becomes non-contact, and the movable part comes into 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), it is detected that there is no vertical compression; when the first limit switch is OFF and the second limit switch is OFF, it is detected that vertical compression operation is in progress or vertical compression release operation is in progress; and when the second limit switch is ON (the first limit switch is OFF), it is detected that there is vertical compression. In this embodiment, the vertical compression mechanism 7 releases pressure when the first limit switch turns from OFF to ON, and the vertical compression mechanism 7 completes pressure when the second limit switch turns from OFF to ON.

[0031] [B-2] Horizontal compression mechanism As shown in Figure 1, horizontal compression mechanisms 8 are provided at the left and right ends in the width direction of the opening in the storage space above the opening. Similar to the vertical compression mechanism 7, the horizontal compression mechanism 8 is positioned offset to the outside side with respect to the lifting and lowering paths of panels 2, 3, and 4 so as not to obstruct the lifting and lowering of panels 2, 3, and 4 in the storage space above the opening. As shown in Figure 1, the horizontal compression mechanism 8 comprises a power cylinder 80, which is exemplified as an actuator located in the storage space above the opening, and a horizontal pressing member 82 (see Figures 5 and 6) that operates in conjunction with the vertical movement of the piston rod 81 of the power cylinder 80. The horizontal pressing member 82 of the horizontal compression mechanism 8 has a rectangular cross-section and is a long member extending in the height direction, and is provided on the inner surface of the tip end of the first side wall 50 on the outside 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 tip end of the second side wall 51 on the inside side. The horizontal compression mechanism 8 presses both ends in the width direction of the indoor side portion of the shutter curtain 1, which is in a fully closed position (vertical compression state), against the watertight rubber member 55, thereby forming a watertight structure extending in the height direction at both ends in the width direction of the shutter curtain 1 when it is in a fully closed position.

[0032] As shown in Figures 5 and 6, the horizontal pressing member 82 extends in the indoor-outdoor direction along the outdoor-side folding piece 500 in a plan view and comprises a long, U-shaped first member (outdoor side member) 820 extending vertically along the guide body 5, a long, U-shaped second member (indoor side member) 821 extending vertically along the guide body 5, and an operating rod 822. The operating rod 822 is a long member extending vertically along the guide body 5, and its upper end is connected to the tip of the piston rod 81 of the power cylinder 80. The operating mechanism is composed of the operating rod 822 and the power cylinder 80 (including the piston rod 81) which 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 inward 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, thereby pressing the indoor side portion against the watertight rubber member 55.

[0033] The horizontal compression mechanism 8 according to this embodiment includes a first limit switch and a second limit switch. When the horizontal compression mechanism 8 is not operating, the movable part 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 protrudes to a predetermined compression position, the first limit switch becomes non-contact, and the movable part comes into 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), it is detected that there is no horizontal compression; when the first limit switch is OFF and the second limit switch is OFF, it is detected that horizontal compression operation is in progress or horizontal compression release operation is in progress; and when the second limit switch is ON (the first limit switch is OFF), it is detected that there is horizontal compression. In this embodiment, the horizontal compression mechanism 8 releases pressure when the first limit switch turns from OFF to ON, and the horizontal compression mechanism 8 completes pressure when the second limit switch turns from OFF to ON.

[0034] [B-3] Middle pillar As shown in Figures 1 and 2, in this embodiment, the waterproof shutter is equipped with a movable central column 9. The central column 9 is located on the indoor side of the shutter curtain 1 when it is in the fully closed position and is installed in close proximity to the indoor side of the shutter curtain 1. The central column 9 is designed to counteract the water pressure acting from the outdoor side to the indoor side of the shutter curtain 1 when it is in the fully closed position. In one embodiment, the central column 9 is installed by first closing the shutter curtain 1 to a watertight state (vertical and horizontal pressure), then moving the central column 9 from its storage position to its installation position and installing it in close proximity to 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 can also be used for the normal opening and closing of building openings, and 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 includes three operating parts: 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 positioned at a height of 1500 mm from the floor so that they can be easily operated by an operator in a standing position. The second outdoor switch box SB2 is positioned at a height exceeding 3000 mm (assumed maximum water level WL) from the floor. The above height positions are illustrative and not limited to this embodiment.

[0037] The control panel inside the switch box is equipped with an open button, a close button, a stop button, a compression button, a compression release button, and an emergency close button. The operation of the waterproof shutter is controlled based on input from these buttons. More specifically, according to the instructions from the button inputs, the operation of the opening / closing mechanism M (raising and lowering of the shutter curtain 1), the vertical compression mechanism 7 (vertical compression and vertical release of the shutter curtain 1 when it is fully closed), and the horizontal compression mechanism 8 (horizontal compression and horizontal release of the shutter curtain 1 when it is vertically compressed) are controlled via the control unit. The following describes each button.

[0038] The waterproof shutter according to this embodiment includes a fully closed state detection means (e.g., consisting of a lower limit switch and a bottom plate switch) for detecting when the shutter curtain 1 is in a fully closed state at the opening, a vertical compression state detection means (first limit switch, second limit switch) for detecting when the shutter curtain 1 is in a vertical compression state, and a horizontal compression state detection means (first limit switch, second limit switch) for detecting when the shutter curtain 1 is in a horizontal compression state.

[0039] When the shutter is released from compression (both vertically and horizontally released from compression) and not in the fully open position, pressing the open button causes 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 causes the shutter curtain to descend and stop in the fully closed position. When the stop button is pressed while the shutter is operating, or during compression or release, the operating shutter curtain 1 stops moving at any desired position.

[0040] When the shutter is in the fully closed position and not in a compressed state (both vertical and horizontal compressed), pressing the compression button initiates a compression operation to achieve a watertight structure. Once the vertical compression mechanism 7 completes its pressing operation (a vertical compression signal is generated when the second limit switch of the vertical compression mechanism 7 is turned ON), the horizontal compression mechanism 8 begins its pressing operation, compressing the vertically compressed shutter curtain 1 as a whole toward the indoor side. When the shutter is not in the fully closed position, pressing the emergency close button allows the shutter curtain to be lowered by a push-all operation.

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

[0042] In one configuration, in addition to operational 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 similar location (operation while confirming safety with a surveillance camera, etc.) is also possible. A series of shutter operations can be controlled by remote operation signals, and it is also possible to perform compression and release operations 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 constructed by connecting a top panel 2, multiple panels 3, and a bottom panel 4 in the panel height direction. When the shutter curtain 1 is raised or lowered and when it is in the fully closed position, the top panel 2, multiple panels 3, and bottom panel 4 are in a vertical position. The description of each part of the top panel 2, multiple panels 3, and bottom panel 4 (specifically, vertical, hanging, horizontal, etc.) is mainly based on the vertical position of the panels.

[0044] [C-1] Top Panel [C-1-1] Outer dimensions 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 with a predetermined width, height, and thickness (depth) extending in the opening width direction, and consists of an outdoor-facing surface 20, an indoor-facing surface 21, an upper surface 22, a lower surface 23, and side surfaces 24 at both ends in the width direction. As shown in Figure 8, the top panel 2 has the same width dimension throughout.

[0045] As shown in Figure 10, the lower end of the outdoor-facing surface 20 of the top panel 2 is formed in a stepped shape that is recessed toward the indoor-facing surface 21. Specifically, the outdoor-facing surface 20 consists of a main surface portion 200 and a stepped portion formed below the main surface portion 200. The stepped portion is formed from the lower end edge portion 201 of the lower end of the main surface portion 200 and the lower outdoor-facing surface (stepped surface) 202 that is displaced toward the indoor-facing surface 21 relative to the vertically positioned main surface portion 200 and hangs down. The upper end of the outdoor-facing surface 20 and the upper end of the indoor-facing surface 21 are at approximately the same height, and the lower end of the indoor-facing surface 21 extends downward beyond the lower end of the outdoor-facing surface 20 (including the lower outdoor-facing surface 202).

[0046] As shown in Figure 8, the upper surface portion 22 of the top panel 2 consists of a horizontal upper surface 220 and a plurality of recesses 221 formed at intervals in the panel width direction. Each recess 221 is formed in a U-shape when viewed from the front, consisting of opposing vertical surfaces 222, 222 and a bottom surface 223. The bottom surface 223 of the recess 221 is formed from a thick pressing plate.

[0047] In a side view, the lower surface portion 23 of the top panel 2 is formed from an outdoor lower surface 230, an outdoor inclined surface 231 extending inward and upward from the indoor portion of the outdoor lower surface 230, a central horizontal surface 232 extending horizontally inward from the indoor portion of the outdoor inclined surface 231, an indoor inclined surface 233 extending inward and downward from the indoor portion of the central horizontal surface 232, an indoor vertical surface 234 hanging down from the indoor portion of the indoor inclined surface 233, and an indoor lower surface 235 extending horizontally inward from the lower end of the indoor 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. 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 panel 3. 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 panel 3 described later.

[0049] [C-1-2] Surface material of the top panel The top panel 2 is assembled from multiple steel plates formed into a predetermined shape. In this embodiment, the main surface portion 200 of the outdoor-facing 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, the folded piece at the upper end forms the outdoor-facing end of the upper surface portion 22, and the folded piece at the lower end forms the lower edge portion 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 surface 202 of the outdoor surface 20 and the outdoor portion of the bottom surface 23 are made of a third surface material that has been folded into a predetermined shape, and the indoor portion of the bottom surface 23 is made of a fourth surface material that has been folded into a predetermined shape. The portions of the third surface material and the fourth surface material overlap to form a central horizontal surface 232, and the portion of the fourth surface material and the folded piece at the lower end of the second surface material overlap to form an indoor lower surface 235.

[0052] The side portion 24 is formed from a surface portion having a shape that conforms to the cross-sectional shape of the top panel 2 and a fifth surface material consisting of a pair of visible pieces. The pair of visible pieces are connected (welded) to the inner surfaces of the outdoor-side visible surface 20 and the indoor-side visible surface 21, respectively. The upper end of the fifth surface material forming the side portion 24 abuts against the upper surface 200 of the top portion 22, and the lower end abuts against the bottom portion 23 at least partially. A hole 240 is formed in the side portion 24 so as to span the horizontal plane 250 of the intermediate horizontal reinforcing member 25, and a gap 241 and an opening 242 are formed in the lower part to serve as drainage openings (see Figure 10A).

[0053] Each vertical surface 222 of the recess 221 in the upper surface portion 22 of the top panel 2 consists of a recessed piece forming the vertical surface 222 and a sixth surface material with an L-shape in cross-section, with the outdoor edge of the recessed piece abutting against the inner surface of the outdoor surface 20, and the indoor surface piece abutting against the inner surface of the indoor surface 21, and connected (welded). As described above, the bottom surface 223 of the recess 221 is formed from a thick pressing plate.

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

[0055] [C-1-3] Horizontal reinforcement material for the top panel The top panel 2 is provided with multiple horizontal reinforcing members that extend across its entire width. Alternatively, multiple shorter horizontal reinforcing members may be connected in the direction of the opening width relative to the entire width of the top panel 2. As shown in Figures 8 and 10, in this embodiment, the top panel 2 is equipped with three horizontal reinforcing members: an upper horizontal reinforcing member 25', an intermediate horizontal reinforcing member 25, and a lower horizontal reinforcing member 26.

[0056] The upper horizontal reinforcing member 25' has a U-shape in cross-sectional view, consisting of a horizontal surface 250', an outdoor hanging piece 251', and an indoor hanging piece 252'. The horizontal surface 250' has a depth corresponding to the distance between the inner surfaces of the first surface material forming the main surface portion 200 of the outdoor visible surface 20 and the second surface material forming the indoor visible surface 21. The outdoor hanging piece 251' and the indoor hanging piece 252' are connected (welded) to the inner surfaces of the first and second surface materials, respectively. Both ends of the upper horizontal reinforcing member 25' in the longitudinal direction are connected (welded) to the visible pieces of the fifth surface material forming the side portion 24. A pressing plate forming the bottom portion 223 of the recess 221 is supported on the horizontal surface 250' of the upper horizontal reinforcing member 25'.

[0057] The intermediate horizontal reinforcement member 25 has a U-shape in cross-sectional view, consisting of a horizontal surface 250, an outdoor-side hanging piece 251, and an indoor-side hanging piece 252. Alternatively, the U-shape may be formed from a rising piece instead of the outdoor-side hanging piece 251 and the indoor-side hanging piece 252. The horizontal surface 250 has a depth corresponding to the distance between the inner surfaces of the first surface material forming the main surface portion 200 of the outdoor-side visible surface 20 and the second surface material forming the indoor-side visible surface 21. The outdoor-side hanging piece 251 and the indoor-side hanging piece 252 are connected (welded) to the inner surfaces of the first and second surface materials, respectively. Both ends of the upper horizontal reinforcement member 25 in the longitudinal direction are connected (welded) to the visible pieces of the fifth surface material forming the side portion 24. Multiple drainage holes (not shown) are formed in the horizontal surface 250 of the intermediate horizontal reinforcement member 25, spaced apart in the longitudinal direction (panel width direction).

[0058] The lower horizontal reinforcing member 26 has a U-shape in cross-sectional view, consisting of a horizontal surface 260, an outdoor-side rising piece 261, and an indoor-side rising piece 262. Alternatively, 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 depth corresponding to the distance between the inner surfaces of the first surface material forming the main surface portion 200 of the outdoor-side visible surface 20 and the second surface material forming the indoor-side visible 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 and second surface materials, respectively. The corner formed by the outdoor-side portion of the horizontal surface 260 and the outdoor-side rising piece 261 abuts against the inner surface of the lower end corner of the first surface material (see Figure 10). Both ends of the lower horizontal reinforcing member 26 in the longitudinal direction are connected (welded) to the visible pieces of the fifth surface material forming the side portion 24. Multiple drainage holes (not shown) are formed on the horizontal surface 260 of the lower horizontal reinforcing member 26, spaced apart in the longitudinal direction (panel width direction).

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

[0060] The first vertical reinforcing member 27 is provided in such a manner that it opposes the vertical force acting on the top panel 2 and transmits the vertical force downward. The first vertical reinforcing member 27 has a height dimension such that its upper end abuts against the horizontal plane 250' of the upper horizontal reinforcing member 25' and its lower end abuts against the horizontal plane 250 of the intermediate horizontal reinforcing member 25, and also has a depth dimension that abuts against the inner surfaces of the first surface material (main surface portion 200 of the outdoor side visible surface 20) and the second surface material (indoor side visible surface 21).

[0061] More specifically, as shown in Figure 9, the first vertical reinforcing member 27 according to this embodiment has a hat-shaped cross-section, comprising an outdoor-side facing surface 270, a pair of depth surfaces 271 extending inward from both ends of the outdoor-side facing surface 270 in the width direction (facing direction), and a pair of indoor-side facing pieces 272 extending in the facing direction so as to be spaced apart from each other from the indoor-side ends of the pair of depth surfaces 271. The outdoor-side facing surface 270, the pair of depth surfaces 271, and the pair of indoor-side facing pieces 272 extend vertically in the height direction of the top panel 2.

[0062] The leading edge 271 of the first vertical reinforcing member 27 has a leading dimension corresponding to the distance between the inner surfaces of the first surface material forming the main surface portion 200 of the outdoor side facing surface 20 and the second surface material forming the indoor side facing surface 21. The first vertical reinforcing member 27 is connected (welded) to the indoor side facing surface 21 by the outdoor side facing surface 270 abutting against the inner surface of the outdoor side facing surface 20 and the indoor side facing piece 272 abutting against the inner surface of the indoor side facing surface 21. The upper edge of the first vertical reinforcing member 27 (at least one pair of leading edges 271) is a horizontal edge and abuts against the lower surface of the horizontal plane 250' of the upper horizontal reinforcing member 25'. The lower edge of the first vertical reinforcing member 27 (at least one pair of leading edges 271) is a horizontal edge and abuts against the upper surface of the horizontal plane 250 of the intermediate horizontal reinforcing member 25. A hole 2710 is formed in the lower part of the leading edge 271.

[0063] The second vertical reinforcing member 28 is provided in such a manner that it opposes the vertical force acting on the top panel 2 and transmits the vertical force downward. The second vertical reinforcing member 28 has a height dimension such that its upper end abuts against the horizontal surface 250 of the intermediate horizontal reinforcing member 25 and its lower end abuts against the horizontal surface 260 of the lower horizontal reinforcing member 26, and also has a depth dimension that abuts against the inner surfaces of the first surface material (main surface portion 200 of the outdoor side visible surface 20) and the second surface material (indoor side visible surface 21).

[0064] The second vertical reinforcement member 28, like the first vertical reinforcement member 27 (see Figure 9), has a hat-shaped cross-section in which, in cross-section it consists of an outdoor-side facing surface 280, a pair of facing surfaces 281 extending inward from both ends of the outdoor-side facing surface in the width direction (facing direction), and a pair of indoor-side facing pieces 282 extending in the facing direction so as to be spaced apart from each other from the indoor-side ends of the pair of facing surfaces 281. The outdoor-side facing surface 280, the pair of facing surfaces 281, and the pair of indoor-side facing pieces 282 extend vertically in the height direction of the top panel 2.

[0065] The depth surface 281 of the second vertical reinforcement member 28 has a depth dimension corresponding to the distance between the inner surface of the first surface material that forms the main surface portion 200 of the outdoor side facing surface 20 and the inner surface of the second surface material that forms the indoor side facing surface 21. The second vertical reinforcement member 28 is connected (welded) to the indoor side facing surface 21 by the outdoor side facing surface 280 abutting against the inner surface of the outdoor side facing surface 20 and the indoor side facing piece 282 abutting against the inner surface of the indoor side facing surface 21. The upper edge of the second vertical reinforcement member 28 (at least one pair of depth surfaces 281) is a horizontal edge and abuts against the lower surface of the horizontal plane 250 of the intermediate horizontal reinforcement member 25. The lower edge of the second vertical reinforcement member 28 (at least one pair of depth surfaces 281) is a horizontal edge and abuts against the upper surface of the horizontal plane 260 of the lower horizontal reinforcement member 26. Two holes 2810 are formed in the depth surface 281 with a vertical gap between them.

[0066] The third vertical reinforcing member 29 is provided in such a manner that it opposes the vertical force acting on the top panel 2 and transmits the vertical force downward. The third vertical reinforcing member 29 has a height dimension at which its upper end abuts against the horizontal plane 260 of the lower horizontal reinforcing member 26, and a height dimension at which its lower end abuts against the portion of the third and fourth surface material (at least including the horizontal plane) that forms the lower end portion, and also has a depth dimension at which it abuts against the outdoor vertical portion of the third surface material (lower outdoor visible surface 202) and the second surface material (indoor visible surface 21).

[0067] The third vertical reinforcement member 29, like the first vertical reinforcement member 27 (see Figure 9) and the second vertical reinforcement member 28, has a hat-shaped cross-section in which, in cross-section it consists of an outdoor-side facing surface 290, a pair of facing surfaces 291 extending inward from both ends of the outdoor-side facing surface 290 in the width direction (facing direction), and a pair of indoor-side facing pieces 292 extending in the facing direction so as to be spaced apart from each other from the indoor-side ends of the pair of facing surfaces 291. The outdoor-side facing surface 290, the pair of facing surfaces 291, and the pair of indoor-side facing pieces 292 extend vertically in the height direction of the top panel 2.

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

[0069] [C-2] Intermediate Panel [C-2-1] Outer dimensions of the intermediate panel The configuration of panel 3 will be described with reference to Figures 11 to 15. Panel 3 is a roughly horizontally rectangular plate-like body with a predetermined width, predetermined height, and predetermined thickness (depth) extending in the opening width direction, and consists of an outdoor-facing surface 30, an indoor-facing surface 31, an upper surface 32, a lower surface 33, and side surfaces 34 at both ends in the width direction.

[0070] The lower end of the outdoor-facing surface 30 is formed in a stepped shape that is recessed toward the indoor-facing surface 31. Specifically, the outdoor-facing surface 30 consists of a main surface portion 300 and a stepped portion formed below the main surface portion 300. The stepped portion is formed from the lower end edge portion 301 of the lower end of the main surface portion 300 and a lower outdoor-facing surface (stepped surface) 302 that is displaced toward the indoor-facing surface 31 relative to the vertically positioned main surface portion 300 and hangs down.

[0071] The upper surface 32 of panel 3 is formed from a horizontal outdoor upper surface 320, an outdoor inclined surface 321 extending inward and upward from the indoor side of the outdoor upper surface 320, a central horizontal surface 322 extending horizontally inward from the indoor side of the outdoor inclined surface 321, an indoor inclined surface 323 extending downward and indoor from the indoor side of the central horizontal surface 322, an indoor vertical surface 324 hanging down from the indoor side of the indoor inclined surface 323, and an indoor lower surface 325 extending horizontally inward from the lower end of the indoor vertical surface 324. A trapezoidal section is formed from the outdoor inclined surface 321, the central horizontal surface 322, and the indoor inclined surface 323 when viewed from the side.

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

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

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

[0075] The lower end portion of panel 3 consists of the lower end portion of the outdoor-facing surface 30 (a stepped portion consisting of the lower edge portion 301 and the lower outdoor-facing surface 302) and the bottom surface portion 33. As shown in Figure 14, a buffer / airtight member 15 extending in the opening width direction is provided on the central horizontal surface 332 of the bottom surface portion 33. The buffer / airtight member 15 has dimensions shorter than the total width of the panel, and the longitudinal edge of the buffer / airtight member 15 substantially coincides with the panel width direction edge 3030 of the outdoor-facing rising piece 303. The buffer / airtight member 15 according to this embodiment is formed from a first layer 150 made of a highly hard flame-retardant rubber (such as chloroprene rubber, which mainly functions as a buffer) and a second layer 151 made of a less hard flame-retardant foam (such as EPDM foam, which mainly functions as an airtight material), but the material is not limited. In this embodiment, a two-layer buffer / airtight member 15 is shown, but it is not limited to this, and a one-layer buffer / airtight member 15 may be formed from a single member. In this embodiment, the buffer / airtight member 15 is provided at the lower end of the panel 3, but the buffer / airtight member may also be provided at the upper end of the panel 3, or at both the upper and lower ends, so that when the opening is fully closed, the buffer / airtight member is sandwiched between the lower end of the upper panel 3 and the upper end of the lower panel 3.

[0076] As shown in Figures 14 and 15, end-room-outside airtight members 17 are provided at both ends of the lower outdoor-facing surface 302 of panel 3 in the panel width direction. The end-room-outside airtight member 17 is a rectangular member when viewed from the front, and its height dimension corresponds to the total height of the lower outdoor-facing surface 302 of panel 3 (in the illustrated configuration, it is slightly larger than the total height of the lower outdoor-facing surface 302), and its visible dimension corresponds to approximately the distance between the side portion 34 of panel 3 and the panel width direction edge 3030 of the outdoor-facing rising piece 303. The thickness of the end-room-outside airtight member 17 is greater than the depth dimension of the lower edge portion 301 of the lower end of the main surface portion 300 of the outdoor-facing surface 30, and when attached to both ends of the lower outdoor-facing surface 302 in the panel width direction, the outer surface of the end-room-outside airtight member 17 is located slightly on the outdoor side than the main surface portion 300. The end room exterior airtight member 17 according to this embodiment is formed from flame-retardant rubber sponge (chloroprene rubber, etc.), but the material is not limited. In this embodiment, the end room exterior airtight member 17 is provided at both ends in the panel width direction at 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 exterior airtight member may also be provided at the upper end.

[0077] As shown in Figures 14 and 15, an end-side airtight member 18 is provided to connect the end-room outer airtight member 17 and the buffer / airtight member 15. The end-side airtight member 18 extends along the outdoor-side lower surface 330, the outdoor-side 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-side lower surface 330, and a portion of the outdoor-side portion of the end-side airtight member 18 is in close contact with the inner surface of the lower end of the end-room outer airtight member 17. In this embodiment, the end-side airtight member 18 is formed from a first layer 180 made of a highly hard flame-retardant rubber sponge (such as chloroprene rubber) and a second layer 181 made of a less hard flame-retardant foam (such as EPDM foam, which mainly functions as an airtight material), but the material is not limited. In this embodiment, a two-layer structure of the lower end airtight member 18 is shown, but it is not limited to this, and a one-layer structure of the lower end airtight member 18 may be formed from a single member. As shown in Figure 14, an airtight member is provided over the entire width of the panel, consisting of a buffer / airtight member 15, left and right lower end airtight members 18 that are in close contact with both ends of the buffer / airtight member 15 in the longitudinal direction, and left and right outer end airtight members 17 that are in close contact with the outdoor side portions of the left and right lower end airtight members 18. The description of the configuration of the lower end of panel 3 can be used in conjunction with the configuration of the lower end of top panel 2 (Figure 10A). In this embodiment, the lower end airtight member 18 is provided at the lower end of panel 3, but the lower end airtight member may also be provided at the upper end of panel 3, or at both the upper and lower end, so that when the opening is fully closed, the lower end airtight member is sandwiched between the lower end of the upper panel 3 and the upper end of the lower panel 3.

[0078] [C-2-2] Surface material of the intermediate panel Panel 3 is assembled from multiple steel plates formed into a predetermined shape. In this embodiment, the main surface portion 300 of the outdoor-facing surface 30 of 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 portion 32, and the folded piece at the lower end becoming the lower edge portion 301. The indoor-facing surface 31 of panel 3 is formed from a second surface material, with the upper end portion of the second surface material forming the indoor-facing rising piece 310, and a folded piece integrally formed at the lower end, with the folded piece at the lower end becoming the indoor-facing lower surface 335 of the lower surface portion 33.

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

[0080] The lower outdoor surface 301 of the outdoor surface 30 and the outdoor portion of the bottom surface 33 are made of a fifth surface material bent into a predetermined shape, and the indoor portion of the bottom surface 33 is made of a sixth surface material bent into a predetermined shape. The portions of the fifth surface material and the sixth surface material overlap to form a central horizontal surface 332, and the portion of the sixth surface material and the bent piece at the lower end of the second surface material overlap to form an indoor bottom surface 335. The sixth surface material forming the indoor vertical surface 334 of the bottom surface 33 has a plurality of drainage holes (not shown) located at the lower end of the indoor vertical surface 334 and spaced apart in the panel width direction. The drainage holes may partially span across the indoor bottom surface 335.

[0081] The side portion 34 is formed from a surface portion having a shape that conforms to the cross-sectional shape of the panel 3 and a seventh surface material consisting of a pair of facing pieces. The pair of facing pieces are in contact with 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 material forming the side portion 34 is at least partially in contact with the inner surfaces of the third and fourth surface materials forming the upper portion 32, and the lower end is at least partially in contact with the fifth and sixth surface materials forming the lower portion 33. A hole 340 (see Figure 15) is formed in the side portion 34 so as to span the horizontal plane 350 of the intermediate horizontal reinforcing member 35. Furthermore, a gap 341 and an opening 342 are formed in the lower part of the side portion 34 to serve as drainage openings.

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

[0083] [C-2-3] Horizontal reinforcement material for intermediate panel The interior of panel 3 is provided with multiple horizontal reinforcing members that extend across its entire width. Alternatively, multiple shorter horizontal reinforcing members may be connected in the direction of the opening width relative to the entire width of panel 3. As shown in Figures 11 and 13, in this embodiment, panel 3 is equipped with two horizontal reinforcing members: an intermediate horizontal reinforcing member 35 and a lower horizontal reinforcing member 36.

[0084] The intermediate horizontal reinforcement member 35 has a U-shape in cross-sectional view, consisting of a horizontal surface 350, an outdoor-side hanging piece 351, and an indoor-side hanging piece 352. Alternatively, 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 depth corresponding to the distance between the inner surfaces of the first surface material forming the main surface portion 300 of the outdoor-side visible surface 30 and the second surface material forming the indoor-side visible surface 31. The outdoor-side hanging piece 351 and the indoor-side hanging piece 352 are connected (welded) to the inner surfaces of the first and second surface materials, respectively. Both ends of the intermediate horizontal reinforcement member 35 in the longitudinal direction are connected (welded) to the visible pieces of the seventh surface material forming the side portion 34. Multiple drainage holes (not shown) are formed in the horizontal surface 350 of the intermediate horizontal reinforcement member 35, spaced apart in the longitudinal direction (panel width direction).

[0085] The lower horizontal reinforcing member 36 has a U-shape in cross-sectional view, consisting of a horizontal surface 360, an outdoor-side rising piece 361, and an indoor-side rising piece 362. Alternatively, 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 depth corresponding to the distance between the inner surfaces of the first surface material forming the main surface portion 300 of the outdoor-side visible surface 30 and the second surface material forming the indoor-side visible surface 31. The outdoor-side rising piece 361 and the indoor-side rising piece 362 are connected (welded) to the inner surfaces of the first and second surface materials, respectively. The corner formed by the outdoor-side portion of the horizontal surface 360 ​​and the outdoor-side rising piece 361 abuts against the inner surface of the lower end corner of the first surface material (see Figure 13). Both ends of the lower horizontal reinforcing member in the longitudinal direction are connected (welded) to the visible pieces of the seventh surface material forming the side portion 34. Multiple drainage holes (not shown) are formed on the horizontal surface 360 ​​of the lower horizontal reinforcing member 36, spaced apart in the longitudinal direction (panel width direction).

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

[0087] The first vertical reinforcing member 37 is provided in such a manner that it opposes the vertical force acting on the panel 3 and transmits the vertical force downward. The first vertical reinforcing member 37 has a height dimension such that its upper end partially abuts against the third and fourth surface materials forming the upper surface portion 32, and its lower end abuts against the horizontal plane 350 of the intermediate horizontal reinforcing member 35. It also has a depth dimension that abuts against the inner surfaces of the first surface material (main surface portion 300 of the outdoor side facing surface 30) and the second surface material (indoor side facing surface 31).

[0088] More specifically, as shown in Figure 12, the first vertical reinforcing member 37 according to this embodiment has a hat-shaped cross-section, comprising an outdoor-side facing surface 370, a pair of facing surfaces 371 extending inward from both ends of the outdoor-side facing surface 370 in the width direction (facing direction), and a pair of indoor-side facing pieces 372 extending in the facing direction so as to be spaced apart from each other from the indoor-side ends of the pair of facing surfaces 371. The outdoor-side facing surface 370, the pair of facing surfaces 371, and the pair of indoor-side facing pieces 372 extend vertically in the height direction of the panel 3.

[0089] The leading surface 371 of the first vertical reinforcing member 37 has a leading dimension corresponding to the distance between the inner surfaces of the first surface material that forms the main surface portion 300 of the outdoor side facing surface 30 and the second surface material that forms the indoor side facing surface 31. The first vertical reinforcing member 37 is connected (welded) to the indoor side facing surface 31 by the outdoor side facing surface 370 abutting against the inner surface of the outdoor side facing surface 30 and the indoor side facing piece 372 abutting against the inner surface of the indoor side facing surface 31.

[0090] The upper edge of the first vertical reinforcing member 37 (at least one pair of facing surfaces 371) is shaped to conform to the third and fourth surface materials forming the upper surface portion 32, and partially (at least horizontally) abuts against the lower surfaces of the third and fourth surface materials forming the upper surface portion 32. The lower edge of the first vertical reinforcing member 37 (at least one pair of facing surfaces 371) is a horizontal edge and abuts against the upper surface of the horizontal plane 350 of the intermediate horizontal reinforcing member 35. A hole 3710 is formed in the lower part of the facing surface 371.

[0091] The second vertical reinforcing member 38 is provided in such a manner that it opposes the vertical force acting on the panel 3 and transmits the vertical force downward. The second vertical reinforcing member 38 has a height dimension such that its upper end abuts against the horizontal surface 350 of the intermediate horizontal reinforcing member 35 and its lower end abuts against the horizontal surface 360 ​​of the lower horizontal reinforcing member 36, and also has a depth dimension that abuts against the first surface material (main surface portion 300 of the outdoor side visible surface 30) and the second surface material (indoor side visible surface 31).

[0092] The second vertical reinforcement member 38, like the first vertical reinforcement member 37 (see Figure 12), has a hat-shaped cross-section in which, in cross-section it consists of an outdoor-facing surface 380, a pair of depth surfaces 381 extending inward from both ends of the outdoor-facing surface in the width direction (facing direction), and a pair of indoor-facing pieces 382 extending in the facing direction so as to be spaced apart from each other from the indoor-facing ends of the pair of depth surfaces 381. The outdoor-facing surface 380, the pair of depth surfaces 381, and the pair of indoor-facing pieces 382 extend vertically in the height direction of the panel 3.

[0093] The leading surface 381 of the second vertical reinforcing member 38 has a leading dimension corresponding to the distance between the inner surface of the first surface material that forms the main surface portion 300 of the outdoor side facing surface 30 and the inner surface of the second surface material that forms the indoor side facing surface 31. The second vertical reinforcing member 38 is connected (welded) to the indoor side facing surface 31, with the outdoor side facing surface 380 abutting against the inner surface of the outdoor side facing surface 30 and the indoor side facing piece 382 abutting against the inner surface of the indoor side facing surface 31.

[0094] The upper edge of the second vertical reinforcing member 38 (at least one pair of facing surfaces 381) is a horizontal edge and abuts against the lower surface of the face portion 350 of the intermediate horizontal reinforcing member 35. The lower edge of the second vertical reinforcing member 38 (at least one pair of facing surfaces 381) is a horizontal edge and abuts against the upper surface of the horizontal plane 360 ​​of the lower horizontal reinforcing member 36. Two holes 3810 are formed in the facing surface 381, spaced apart vertically.

[0095] The third vertical reinforcing member 39 is provided in such a manner that it opposes the vertical force acting on the panel 3 and transmits the vertical force downward. The third vertical reinforcing member 39 has a height dimension at which its upper end abuts against the horizontal surface 360 ​​of the lower horizontal reinforcing member 36, and a height dimension at which its lower end abuts against the portion of the fifth and sixth surface materials (at least including the horizontal surface) that forms the lower end portion, and also has a depth dimension at which it abuts against the outdoor vertical portion of the fifth surface material (lower outdoor visible surface 302) and the second surface material (indoor visible surface 31).

[0096] The third vertical reinforcement member 39, like the first vertical reinforcement member 37 (see Figure 12) and the second vertical reinforcement member 38, has a hat-shaped cross-section in which it consists of an outdoor-side facing surface 390, a pair of facing surfaces 391 extending inward from both ends of the outdoor-side facing surface 390 in the width direction (facing direction), and a pair of indoor-side facing pieces 392 extending in the facing direction so as to be spaced apart from each other from the indoor-side ends of the pair of facing surfaces 391. The outdoor-side facing surface 390, the pair of facing surfaces 391, and the pair of indoor-side facing pieces 392 extend vertically along the height direction of the panel 3.

[0097] The leading surface 391 of the third vertical reinforcing member 39 has a leading dimension corresponding to the distance between the portion 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. The third vertical reinforcing member 39 is connected (welded) to the inner surface of the fifth surface material that forms the lower outdoor facing surface 302, with the outdoor facing surface 390 in contact with the inner surface of the fifth surface material that forms the lower outdoor facing surface 302, and the indoor facing piece 392 in contact with the inner surface of the second surface material that forms the indoor facing surface 31.

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

[0099] [C-3] Bottom Panel [C-3-1] Outer dimensions of the bottom panel (panel body) The configuration of the bottom panel 4 according to this embodiment will be described with reference to Figures 16 to 18. The bottom panel 4 consists of a bottom panel body 4' and a movable seat plate 6 provided at the lower end of the bottom panel body 4'. The bottom panel body 4' is a roughly horizontally rectangular plate-like body with a predetermined width, predetermined height, and predetermined thickness (depth dimension) extending in the opening width direction, and consists of an outdoor facing surface 40, an indoor facing surface 41, an upper surface portion 42, a lower surface portion 43 (outdoor lower surface 430, indoor lower surface 31), and side portions 44 at both ends in the width direction. As shown in Figure 16, the width dimension (face dimension) of the movable seat plate 6 is the same as the width dimension (face dimension) of the bottom panel body 4', and the depth dimension of the movable seat plate 6 is the same as the depth dimension of the bottom panel body 4'.

[0100] The upper surface portion 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 inward and upward from the indoor side of the outdoor upper surface 420, a central horizontal surface 422 extending horizontally inward from the indoor side of the outdoor inclined surface 421, an indoor inclined surface 423 extending downward and indoor from the indoor side of the central horizontal surface 422, an indoor vertical surface 424 hanging down from the indoor side of the indoor inclined surface 423, and an indoor lower surface 425 extending horizontally inward from the lower end of the indoor vertical surface 424.

[0101] The upper surface portion 42 has an outdoor rising piece 400 that rises vertically flush with the outdoor facing surface 40, and the indoor surface portion 42 has an indoor rising piece 410 that rises vertically flush with the indoor facing surface 41. The upper end portion of the panel body 4' consists of the upper surface portion 42, the outdoor rising piece 400, and the indoor rising piece 410. As shown in Figure 16, the width dimension of the outdoor rising piece 400 of the panel body 4' is smaller than the width dimension of the panel body 4', and the edge 4000 of the outdoor rising piece 400 in the panel width direction is located inward from the side portion 44 of the panel body 4'. The configuration of the upper end portion of the panel body 4' is substantially the same as that of the upper end portion of panel 3, and for the top view of the bottom panel body 4', refer to the top view of panel 3 shown in Figure 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. 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] Surface material of the bottom panel (panel body) 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 folded piece at the upper end forming the outdoor-facing upper surface 420 of the upper surface portion 42, and the folded piece at the lower end forming the outdoor-facing lower surface 430 as an outdoor-facing horizontal piece. The indoor-facing surface 41 of the panel body 4' is formed from a second surface material, with the upper end portion of the second surface material forming the indoor-facing rising piece 410, and the folded piece at the lower end forming the indoor-facing lower surface 431 as an indoor-facing horizontal piece.

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

[0105] The side portion 44 is formed from a surface portion having a shape that conforms to the cross-sectional shape of the panel body 4' and a fifth surface material consisting of a pair of facing pieces. The pair of facing pieces are connected (welded) to the inner surfaces of the outdoor facing surface 40 and the indoor facing surface 41, respectively. As shown in Figure 17A, a hole 440 is formed in the side portion 44 so as to span the horizontal plane 450 of the intermediate horizontal reinforcing member 45. In the lower part of the side portion 44, there is a gap 441, a hole 442, and a hole 443 formed so as to span the horizontal plane 460 of the lower horizontal reinforcing member 46. The first to fifth surface materials formed into predetermined shapes have been described, but these are examples, and the shape, number, assembly structure, etc. of the surface materials (plate materials) forming the surface of the bottom panel body 4' are not limited.

[0106] [C-3-3] Horizontal reinforcement material for the bottom panel (panel body) The panel body 4' is provided with multiple horizontal reinforcing members that extend across its entire width. Alternatively, multiple shorter horizontal reinforcing members may be connected in the direction of the opening width relative to the entire width of the panel body 4'. In this embodiment, the panel body 4' is equipped with two horizontal reinforcing members: an intermediate horizontal reinforcing member 45 and a lower horizontal reinforcing member 46.

[0107] The intermediate horizontal reinforcement member 45 has a U-shape in cross-sectional view, consisting of a horizontal surface 450, an outdoor-side hanging piece 451, and an indoor-side hanging piece 452. Alternatively, the U-shape may be formed from a rising piece instead of the outdoor-side hanging piece 451 and the indoor-side hanging piece 452. The horizontal surface 450 has a depth corresponding to the distance between the inner surfaces of the first surface material forming the outdoor-side visible surface 40 and the second surface material forming the indoor-side visible surface 41. The outdoor-side hanging piece 451 and the indoor-side hanging piece 452 are connected (welded) to the inner surfaces of the first and second surface materials, respectively. Both ends of the intermediate horizontal reinforcement member 45 in the longitudinal direction are connected (welded) to the visible pieces of the fifth surface material forming the side surface 44. Multiple drainage holes (not shown) are formed in the horizontal surface 450 of the intermediate horizontal reinforcement member 45, spaced apart in the longitudinal direction (panel width direction).

[0108] The lower horizontal reinforcing member 46 has a U-shape in cross-sectional view, consisting of a horizontal surface 460, an outdoor vertical surface 461 hanging down from the outdoor end of the horizontal surface 460, and an indoor vertical surface 462 hanging down from the indoor end of the horizontal surface 460. The horizontal surface 460 has a depth corresponding to the distance between the inner surfaces of the first surface material forming the outdoor visible surface 40 and the second surface material forming the indoor visible surface 41. The outdoor vertical surface 461 and the indoor vertical surface 462 are in contact with and connected (welded) to the inner surfaces of the outdoor visible surface 40 and the indoor visible surface 41. The lower end of the outdoor vertical surface 461 is in contact with the base end of the outdoor lower surface 430, which is an outdoor horizontal piece, and the lower end of the indoor vertical surface 462 is in contact with the base end of the indoor lower surface 431, which is an indoor horizontal piece. The height dimension of the lower horizontal reinforcing member 46 is greater than the height dimension of the intermediate horizontal reinforcing member 45, and multiple detection switches SW are provided in the space enclosed by the lower horizontal reinforcing member 46, the outdoor lower surface 430, and the indoor lower surface 431, extending in the width direction. The horizontal surface 460 of the lower horizontal reinforcing member 46 serves as the mounting surface for the detection switches SW. Multiple drainage holes (not shown) are formed on the horizontal surface 460 of the lower horizontal reinforcing member 46, spaced apart in the length direction (panel width direction).

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

[0110] The first vertical reinforcing member 47 is provided in such a manner that it opposes the vertical force acting on the panel body 4' and transmits the vertical force downward. The first vertical reinforcing member 47 has a height dimension such that its upper end partially abuts against the third and fourth surface materials forming the upper surface portion 42, and its lower end abuts against the horizontal plane 450 of the intermediate horizontal reinforcing member 45. It also has a depth dimension that abuts against 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 reinforcing member 47 according to this embodiment has a hat-shaped cross-section, comprising an outdoor-facing surface 470, a pair of depth surfaces 471 extending inward from both ends of the outdoor-facing surface 470 in the width direction (facing direction), and a pair of indoor-facing pieces 472 extending in the facing direction from the indoor-facing ends of the pair of depth surfaces 471 so as to be spaced apart from each other. The outdoor-facing surface 470, the pair of depth surfaces 471, and the pair of indoor-facing pieces 472 extend vertically in the height direction of the panel body 4'.

[0112] The leading surface 471 of the first vertical reinforcing member 47 has a leading dimension corresponding to the distance 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. The first vertical reinforcing member 47 is connected (welded) to the indoor side facing surface 41, with the outdoor side facing surface 470 abutting against the inner surface of the outdoor side facing surface 40 and the indoor side facing piece 472 abutting against the inner surface of the indoor side facing surface 41.

[0113] The upper edge of the first vertical reinforcing member 47 (at least one pair of facing surfaces 471) is shaped to conform to the third and fourth surface materials forming the upper surface portion 42, and partially (at least horizontally) abuts against the lower surfaces of the third and fourth surface materials forming the upper surface portion 42. The lower edge of the first vertical reinforcing member 47 (at least one pair of facing surfaces 471) is a horizontal edge and abuts against the upper surface of the horizontal plane 450 of the intermediate horizontal reinforcing member 45. A hole 4710 is formed in the lower part of the facing surface 471.

[0114] The second vertical reinforcing member 48 is provided in such a manner that it opposes the vertical force acting on the panel body 4' and transmits the vertical force downward. The second vertical reinforcing member 48 has a height dimension such that its upper end abuts against the horizontal plane 450 of the intermediate horizontal reinforcing member 45 and its lower end abuts against the horizontal plane 460 of the lower horizontal reinforcing member 46, and also has a depth dimension that abuts against the first surface material (outdoor side visible surface 40) and the second surface material (indoor side visible surface 41).

[0115] The second vertical reinforcement member 48, like the first vertical reinforcement member 47, has a hat-shaped cross-section in which, in cross-section it consists of an outdoor-facing surface 480, a pair of depth surfaces 481 extending inward from both ends of the outdoor-facing surface in the width direction (facing direction), and a pair of indoor-facing pieces 482 extending in the facing direction so as to be spaced apart from each other from the indoor-facing ends of the pair of depth surfaces 481. The outdoor-facing surface 480, the pair of depth surfaces 481, and the pair of indoor-facing pieces 482 extend vertically in the height direction of the panel body 4'.

[0116] The leading surface 481 of the second vertical reinforcing member 48 has a leading dimension corresponding to the distance 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. The second vertical reinforcing member 48 is connected (welded) to the indoor side facing surface 41, with the outdoor side facing surface 480 abutting against the inner surface of the outdoor side facing surface 40 and the indoor side facing piece 482 abutting against the inner surface of the indoor side facing surface 41.

[0117] The upper edge of the second vertical reinforcing member 48 (at least one pair of facing surfaces 481) is a horizontal edge and abuts against the lower surface of the horizontal plane 450 of the intermediate horizontal reinforcing member 45. The lower edge of the second vertical reinforcing member 48 (at least one pair of facing surfaces 481) is a horizontal edge and abuts against the upper surface of the horizontal plane 460 of the lower horizontal reinforcing member 46. In this embodiment, the entire lower edge of the second vertical reinforcing member 48 is a horizontal edge and abuts against the upper surface of the horizontal plane 460 of the lower horizontal reinforcing member 46. Two holes 4810 are formed in the facing surface 481 with a vertical gap between them.

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

[0119] The distance 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 bottom surface of the panel body 4'. The movable seat plate 6 is suspended from the bottom end of the panel body 4' so as to be able to move upward, with the outdoor-facing locking piece 65 locked to the outdoor-facing bottom surface 430, which is the outdoor-facing horizontal piece of the panel body 4', and the indoor-facing locking piece 66 locked to the indoor-facing bottom surface 431, which is the indoor-facing horizontal piece of the panel body 4'.

[0120] Located inside the lower end portion of the panel body 4' (the space surrounded by the lower horizontal reinforcing member 46), multiple detection switches SW are mounted on the horizontal surface 460 of the lower horizontal reinforcing member 46 at intervals in the panel width direction. When the shutter curtain 1 is lowered, the bottom surface of the movable seat plate 6 comes into contact with an obstacle or the floor, causing the movable seat plate 6 to move upward relative to the panel body 4'. If any of the detection switches SW are turned ON, an obstacle detection signal is transmitted to the control unit via the cord reel CR.

[0121] The depth of the movable seat plate 6 is the same as the depth 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] On the outdoor side of the movable seat plate 6, a groove is formed extending in the longitudinal direction of the movable seat plate 6 (the width direction of the bottom panel 4) from the outdoor side of the bottom surface 60, the outdoor side rising piece 61, and the outdoor side facing surface 63, and an outdoor side elastic water-sealing member 16α is fitted into the groove. As will be described later, the outdoor side elastic water-sealing member 16α also functions as an airtight member.

[0123] On the indoor side of the movable seat plate 6, a groove is formed extending in the longitudinal direction of the movable seat plate 6 (the width direction of the bottom panel 4) from the indoor side of the bottom surface 60, the indoor side rising piece 62, and the indoor side facing surface 64, and an indoor side elastic water-stopping member 16β is fitted into the groove. The configuration of the indoor side elastic water-stopping member 16β provided on the movable seat plate 6 is the same as the elastic water-stopping member 16 provided on the panel 3, except for slight differences in dimensions and shape, and each part is assigned a common reference number (Figures 26 and 27), so the explanation of the elastic water-stopping member 16 can be used as a reference. In addition, the configuration 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, the movable seat plate 6 is provided with an outdoor-side elastic water-sealing member 16α and an indoor-side elastic water-sealing member 16β. However, the outdoor-side elastic water-sealing member and the indoor-side elastic water-sealing member may also be provided on the lower surface portion 43 of the bottom panel body 4' (outdoor-side lower surface 430, indoor-side lower surface 31), or on both the movable seat plate 6 and the lower surface portion 43, so that when the opening is fully closed, the outdoor-side elastic water-sealing member and the indoor-side elastic water-sealing member are sandwiched between the movable seat plate 6 and the lower surface portion 43 of the bottom panel body 4'.

[0124] An elastic water-sealing member 19 is provided on the underside of the bottom surface 60 of the movable seat plate 6, extending across its entire width, which contacts the floor surface FL when the seat touches the floor and is pressed against the floor surface FL when vertical pressure is applied.

[0125] [C-4] Configuration of the fitting of adjacent panels vertically in a shutter curtain In the fully closed position of the shutter curtain 1, the lower end portion of the top panel 2 and the upper end portion of panel 3, the lower end portion of panel 3 and the upper end portion of panel 3, and the lower end portion of panel 3 and the upper end portion of bottom panel 4 are fitted together. In this embodiment, in vertically adjacent panels, the lower end portion or lower portion of the upper panel is generally concave, and the upper end portion or upper portion of the lower panel is generally convex, so that they fit together with a concave and convex shape when the opening is fully closed. 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. Therefore, the fitting between vertically adjacent panels of the shutter curtain 1 according to this embodiment will be explained based on the fitting of vertically adjacent panels 3 in the fully closed position of the shutter curtain 1.

[0126] First, we will describe the position before the lower end of the upper panel 3 and the upper end 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 of the upper panel 3 and the upper end of the lower panel 3 are separated (see Figure 4 left and Figure 21). Figure 21 shows the positional relationship between the lower end of the upper panel 3 and the upper end of the lower panel 3 when the panels 3 are lowered. Figure 21 left shows the positional relationship between the lower end of the upper panel 3 and the upper end 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 diagram of Figure 21, the lower outdoor surface 302 of the lower end portion of the upper panel 3 and the upper end portion (hemmed folded portion) of the outdoor rising piece 303 of the upper end portion of the lower panel 3 are close together (they are spaced apart in this embodiment), the outdoor 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 lower surface 330 of the lower surface portion 33 of the lower end portion of the upper panel 3, the outdoor 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 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 buffer / airtight member 15 provided on the central horizontal surface 332 of the lower surface portion 33 of the lower end portion of the upper panel 3 The upper surface 323 of the upper surface 32 of the upper end of the lower panel 3 is located directly below the indoor inclined surface 333 of the lower end of the upper panel 3, and the indoor vertical surface 324 of the upper surface 32 of the upper end of the lower panel 3 is located slightly to the outdoor side of the indoor vertical surface 334 of the lower end of the lower panel 33 (the indoor vertical surface 334 is close to the indoor vertical surface 324 and hangs down). The elastic water-stopping member 16 (upper surface 164) is located directly below the indoor lower surface 335 of the lower end of the lower panel 33 in the groove formed from the indoor vertical surface 324, the indoor lower surface 325, and the indoor rising piece 310 of the lower panel 3. When the upper panel 3 moves downward relative to the lower panel 3 from the state shown in the left diagram of Figure 21, it becomes the state shown in Figure 19.

[0128] The central view of Figure 21 shows the state in which the upper panel 3 is slightly displaced indoors relative to the lower panel 3 when the upper and lower adjacent panels 3 are lowered. When the shutter curtain 1 is lowered and displaced indoors, the indoor facing surface 31 of the panel 3 comes into contact with 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 inclined surface 331 at the lower end of the upper panel 3 and the central horizontal plane 330 is located slightly indoors than the corner of the outdoor upper surface 320 and outdoor inclined surface 321 at the upper end of the lower panel 3. When the upper panel 3 moves downward relative to the lower panel 3 from this state, the outdoor inclined surface 331 of the upper panel 3 is guided by the outdoor inclined surface 321 of the lower panel 3, causing the upper panel 3 to move outdoors relative to the lower panel 3, resulting in the state shown in Figure 19.

[0129] The right-hand diagram of Figure 21 shows the state in which the upper panel 3 is slightly displaced towards the outdoors relative to the lower panel 3 when the upper and lower adjacent panels 3 are lowered. When the shutter curtain 1 is lowered and displaced towards the outdoors, the lower outdoor surface 302 at the lower end comes into contact with the outdoor rising piece 303 at the upper end of the lower panel 3, so it does not displace further towards the outdoors from the state shown in the right-hand diagram of Figure 21. In the right diagram of Figure 21, the corner of the indoor vertical surface 334 and the indoor lower surface 335 at the lower end of the upper panel 3 is located slightly indoors from the corner of the indoor inclined surface 323 and the indoor vertical surface 324 at the upper end of the lower panel 3. When the upper panel 3 moves downward relative to the lower panel 3 from this state, the lower outdoor facing surface 302 at the lower end of the lower panel 3 slides against the outdoor rising piece 303 at the upper end of the lower panel 3 as it moves downward, and the indoor vertical surface 334 at the lower end of the upper panel 3 slides against the indoor vertical surface 324 of the lower panel 3 as it moves downward, resulting in the state shown in Figure 19.

[0130] Figure 19 shows the 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 from the state shown in the left diagram of Figure 21 (the shutter curtain 1 is in the fully closed position and is in a non-vertical compression state). In Figure 19, the outdoor rising piece 303 of the upper end portion of the lower panel 3 is close to the outdoor side of the lower outdoor side facing surface 302 of the lower end portion of the upper panel 3 (the outdoor rising piece 303 is located on the stepped portion formed by the lower end edge portion 301 and the lower outdoor side facing surface 302), the outdoor lower surface 330 of the lower end portion of the upper panel 3 is close to the outdoor upper surface 320 of the upper end portion of the lower panel 3 (in this embodiment they are spaced apart and not in contact), the outdoor inclined surface 331 of the lower end portion of the upper panel 3 is close to the outdoor inclined surface 321 of the upper end portion of the lower panel 3 (in this embodiment they are spaced apart and not in contact), and the lower A 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 (they are spaced apart and not in contact 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 an elastic watertight member 16 (upper surface 164) provided on the indoor side of the upper end portion of the lower panel 3. The panels 2, 3, and 4 in this embodiment are assembled from surface materials made of steel plates of a predetermined shape, and therefore have the disadvantage of being more difficult to achieve precision with compared to aluminum-formed panels. In this embodiment, by adopting the fitting structure described above, rattling between panels caused by precision errors is suppressed. In addition, the lower end of the upper panel and the upper end of the lower panel are in close contact via a cushioning and airtight member 15 that functions as a damper, so even if there are precision errors, the panels can be kept in close contact, and the downward pressing force by the vertical compression mechanism 7 can be effectively applied downwards.

[0131] Figure 20 shows the state in which vertical compression occurs in the state shown in Figure 19. In Figure 20, the outdoor rising piece 303 of the upper end of the lower panel 3 is close to the outdoor side of the lower outdoor facing surface 302 of the lower end of the upper panel 3 (the outdoor rising piece 303 is located on the stepped portion formed by the lower edge portion 301 and the lower outdoor facing surface 302), the outdoor lower surface 330 of the lower end portion of the upper panel 33 is in contact with the outdoor upper surface 320 of the upper end portion of the lower panel 32, the outdoor inclined surface 331 of the lower end portion of the upper panel 33 is close to the outdoor inclined surface 321 of the upper end portion of the lower panel 32 (in this embodiment they are spaced apart and in a non-contact state), and the central horizontal of the lower end portion of the lower end portion of the upper panel 33 The buffer / airtight member 15 provided on surface 332 is compressed between it and the central horizontal surface 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 (they are spaced apart and not in contact in this embodiment), 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 downwards against the elastic watertight member 16 provided on the indoor side of the upper end of the panel 3.

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

[0133] As shown in Figure 3, the vertical reinforcing units of the top panel 2, panel 3, and bottom panel 4 are aligned in the height direction. In this embodiment, three vertical compression mechanisms 7 are arranged with spacing in the opening width direction, and the top panel 3 is provided with three compression areas (compression recesses 221 in this embodiment) corresponding to the three vertical compression mechanisms 7. Of the five sets of vertical reinforcing units of the top panel 2, the upper ends of the left and right vertical reinforcing units and the central vertical reinforcing unit are located in the compression areas. With this configuration, each panel 2, 3, and 4 can resist the downward pressing force from the vertical compression mechanisms 7, and the pressing force can be effectively applied downwards.

[0134] [D]Water stop structure [D-1] Water-sealing structure between panels in a fully closed shutter curtain When the shutter curtain 1, which is in a fully closed position, is subjected to vertical compression, a watertight or watertight structure is formed between the lower end of the top panel 2 and the upper end of panel 3, between the lower end of panel 3 and the upper end of panel 3, and between the lower end of panel 3 and the upper end 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-sealing structure between the panels of the shutter curtain 1 according to this embodiment will be explained based on the water-sealing structure of the vertically adjacent panels 3 in the shutter curtain 1 when it is in the fully closed position.

[0136] In this embodiment, the water-stopping structure is formed on the indoor side of the shutter curtain 1 when it is in the fully closed position. On the indoor side of the upper end of the panel 3, a groove is formed extending in the panel width direction from the indoor vertical surface 324, the indoor lower surface 325, and the indoor rising piece 310, and a long elastic water-stopping member 16 is fitted into the groove. When the shutter curtain 1 is lowered, the elastic water-stopping member 16 of the lower panel 3 and the indoor lower surface 335 of the upper panel 3 are separated (see Figure 4, left), and in the fully closed position of the shutter curtain 1 (non-vertical compression state), the indoor lower surface 335 of the upper panel 3 comes into contact with 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 from the state shown in Figure 19, is subjected to vertical compression, the lower indoor surface 335 of the upper panel 3 comes into contact with the upper surface 164 of the elastic water-sealing member 16 of the lower panel 3. As the elastic water-sealing member 16 is pressed downward, the pressed elastic water-sealing member 16 closes the gap between the lower end portion of the panel 3 and the indoor portion of the upper end portion of the panel 3, thereby forming a water-sealing structure (see Figure 20).

[0137] The groove formed on the indoor side of the upper end of panel 3 has a bottom (indoor lower surface 325), the inner surface of the outer facing piece (indoor rising piece 310) rising from the outer end of the bottom (indoor lower surface 325), and a first portion 3240 of the inner facing surface (indoor vertical surface 324) located inside the bottom (indoor lower surface 325) that faces the outer facing piece (indoor rising piece 310). The inner facing surface (indoor vertical surface 324) is adjacent to the first portion 3240 and includes a second portion 3241 located outside the groove (above the first portion 3240 and above the upper end of the outer facing piece (indoor rising piece 310)).

[0138] As shown in Figures 24 and 25, the elongated elastic water-stopping member 16 fitted into the groove extending in the panel width direction is integrally formed from a hard elastic portion 16A located inside 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 from the hard elastic portion 16A. In this embodiment, the hard elastic portion 16A is made of flame-retardant rubber (chloroprene rubber, etc.) and the soft elastic portion 16B is made of flame-retardant rubber sponge (chloroprene rubber sponge, etc.), but these materials are examples only and are not limited. In this embodiment, the elastic water-stopping member 16 is integrally formed from a hard elastic portion 16A located inside the groove and a soft elastic portion 16B located outside the groove. This prevents deformation of the base of the elastic water-stopping member 16 inside the groove under the weight of the panel or vertical pressure, thereby maintaining the shape of the base of the elastic water-stopping member 16.

[0139] As shown in Figure 24, the rigid elastic part 16A comprises a bottom surface 160, an inner visible surface 161, an outer visible surface 162, and a connecting surface (upper surface) 163, while the soft elastic part 16B comprises a contact surface (upper surface) 164, an inner visible surface 165, an outer visible surface 166, and a connecting surface (lower surface) 167 that is in close contact with the connecting surface (upper surface) 163. Note that in the description of the elastic water-stopping member 16, "inside" refers to the side closer to the indoor vertical surface 324 when fitted into the groove, and "outside" refers to the side further from the indoor vertical surface 324 when fitted into the groove.

[0140] The connecting surface (upper surface) 163 of the rigid elastic part 16A consists of a first horizontal surface 1630 and a first inclined surface 1631 that slopes from the outside of the first horizontal surface 1630 toward the bottom surface 160, and the connecting surface (lower surface) 167 of the soft elastic part 16B consists of a second horizontal surface 1670 and a second inclined surface 1671 that slopes from the outside of the second horizontal surface 1670 toward the top surface 164, with the first horizontal surface 1630 and the second horizontal surface 1670, and the first inclined surface 1631 and the second inclined surface 1671 in close contact.

[0141] The upper surface of the elastic water-sealing member 16 is formed from the upper surface 164 of the soft elastic portion 16B, and the bottom surface of the elastic water-sealing member 16 is formed from the bottom surface 160 of the hard elastic portion 16A. 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, and the inner visible surface 161 of the hard elastic portion 16A and the inner visible surface 165 of the soft elastic portion 16B form the inner visible surface of the elastic water-sealing member 16.

[0142] Multiple ridges 1610 (four in the illustrated configuration) extending in the panel width direction are formed on the inner surface 161 of the rigid elastic portion 16A. That is, the inner surface of the rigid elastic portion 16A consists of the inner surface 161 and multiple ridges 1610 formed on the inner surface 161 that extend in the panel width direction.

[0143] The outer visible surface 166 of the soft elastic portion 16B consists of a first portion 1660 on the bottom surface 160 side and a second portion 1661 on the contact surface (upper surface) 164 side. As will be described later, the outer visible surface 166 of the soft elastic portion 16B consists of a first portion 1660 that is in close contact with the inner surface of the outer visible piece (indoor side rising piece 310) and a second portion 1661 that is located outside the groove. The outer visible portion 162 of the hard elastic portion 16A consists of a projection 1620 that protrudes inclined so as to be separated from the bottom surface 160, and a recess 1621 adjacent to the upper side of the projection 1620 that allows elastic deformation of the projection 1620. When no external force is acting on the elastic water-stopping member 16, the tip of the projection 1620 is located slightly inward from the outer visible surface 166 of the soft elastic portion 16B, but may be approximately the same.

[0144] As shown in Figure 25, the rigid elastic portion 16A of the elastic water-sealing member 16 is fitted into the groove, and most of the flexible elastic portion 16B of the elastic water-sealing member 16 is located outside the groove (above the groove), with only the outer and lower portion located inside the groove. When the elastic water-sealing member 16 is fitted into the groove, the bottom surface of the elastic water-sealing member 16 (bottom surface 160 of the rigid elastic portion 16A) is in contact with the bottom (indoor lower surface 325), the inner visible portion of the rigid elastic portion 16A is in contact with the first portion 3240 of the inner visible surface (indoor vertical surface 324) of the groove via the projection 1610, and the outer visible portion 162 of the rigid elastic portion 16A is in close contact with the inner surface of the outer visible piece (indoor rising piece 310) via the projection 1620.

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

[0146] The inner visible portion of the rigid elastic part 16A abuts against the first portion 3240 of the inner visible surface (indoor side vertical surface 324) of the groove via the protrusion 1610, acting as a force that presses the elastic water-stopping member 16 against the inner surface of the outer visible piece (indoor side rising piece 310). As a result, the first portion 1660 of the outer visible surface 166 is compressed (1660') and adheres tightly to the inner surface of the outer visible piece (indoor side rising piece 310), and the protrusion 1620 of the rigid elastic part 16A is elastically deformed upward, with its tip end in close contact with the inner surface of the outer visible piece (indoor side rising piece 310).

[0147] When the elastic water-sealing member 16 is fitted into the groove, the projection 1620 of the outer visible portion 162 of the hard elastic portion 16A extends inclined so as to be separated from the bottom surface 160, and its tip is in close contact with the inner surface of the outer visible piece (indoor side rising piece 310), and it braces against the direction in which the elastic water-sealing member 16 would come out of the groove, preventing the elastic water-sealing member 16 from coming out of the groove.

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

[0149] In the vertically compressed position of the elastic water-sealing member 16, the indoor-side lower surface 335 of the upper panel 3 is pressed against the upper surface 164 of the elastic water-sealing member 16 of the lower panel 3, thereby forming a water-sealing structure in the indoor-side portion between the lower end of the upper panel 3 and the upper end of the lower panel 3. Furthermore, as shown in Figure 20, in the vertically compressed position of the elastic water-sealing member 16, when the elastic water-sealing member 16 is pressed in the height direction, 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 comes into close contact with the tip edge (upper edge) 3100 of the outer visible piece (indoor-side rising piece 310), thereby forming a water-sealing 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 (indoor side vertical surface 324). Furthermore, 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 were to seep 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 leading edge (upper edge) 3100 of the outer visible piece (indoor side rising piece 310), thereby preventing water from seeping into the indoor side.

[0151] The second portion 1661 of the outer surface 166 bulges outward (indicated as 1661') compared to the outer surface of the outer piece (indoor rising piece 310). Note that the bulging shape of the second portion 1661 shown in Figure 26 is just one example, and different bulging shapes may occur depending on how force is applied. As will be described later, under vertical and horizontal compression conditions, the bulging second portion 1661' of the outer surface 166 adheres tightly to the watertight rubber member 55.

[0152] [D-2] Water-sealing structure between the bottom panel body and the base plate in a fully closed shutter curtain When the shutter curtain 1, which is in the fully closed position, is subjected to vertical compression, a watertight structure is formed between the bottom panel body 4' and the movable seat plate 6 in the bottom panel 4. In this embodiment, the watertight structure is formed on the indoor side of the bottom panel 4 of the shutter curtain 1 when it is in the fully closed position.

[0153] On the indoor side of the movable seat plate 6, a groove is formed extending in the longitudinal direction of the movable seat plate 6 (the width direction of the bottom panel 4) from the indoor side of the bottom surface 60, the indoor side rising piece 62, and the indoor side facing 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 at the lower end 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 in the fully closed position of the shutter curtain 1 (non-vertical compression state), the indoor side lower surface 431 at the lower end of the main body 4' comes into contact with the upper surface 164 of the elastic water-stopping member 16β (see Figure 22). When the shutter curtain 1, in the fully closed position from the state shown in Figure 22, is subjected to vertical compression, the upper surface 164 of the elastic water-sealing member 16β comes into contact with the indoor lower surface 431 of the lower end of the main body 4'. As the elastic water-sealing member 16β is pressed downward, the pressed elastic water-sealing member 16β closes the gap between the lower end of the panel body 4' and the indoor portion of the movable seat plate 6, thereby forming a water-sealing structure (see Figure 28).

[0154] The groove formed on the indoor side of the upper end of panel 3 has a bottom (indoor side of the 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 of the inner facing surface (indoor side facing surface 64) located inside the bottom, which faces the outer facing piece (indoor side rising piece 62). In cross-section, the groove has a roughly U-shape, and the inner facing surface (indoor side facing surface 64) is adjacent to the first portion 640 and has a second portion 641 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 plate width direction), is integrally formed from a hard elastic portion 16A located inside 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 from the hard elastic portion 16A. In this embodiment, the hard elastic portion 16A is made of flame-retardant rubber (chloroprene rubber, etc.) and the soft elastic portion 16B is made of flame-retardant rubber sponge (chloroprene rubber sponge, etc.), but these materials are examples only and are not limited. In this embodiment, the elastic water-stopping member 16 is integrally formed from a hard elastic portion 16A located inside the groove and a soft elastic portion 16B located outside the groove. This prevents deformation of the base of the elastic water-stopping member 16 inside the groove under the weight of the panel or vertical pressure, thereby maintaining the shape of the base of the elastic water-stopping member 16.

[0156] The basic configuration of the elastic water-sealing member 16β is the same as that of the elastic water-sealing member 16, and can be explained with reference to Figure 24. As shown in Figure 24, the rigid elastic part 16A comprises a bottom surface 160, an inner visible surface 161, an outer visible surface 162, and a connecting surface (upper surface) 163, while the soft elastic part 16B comprises a contact surface (upper surface) 164, an inner visible surface 165, an outer visible surface 166, and a connecting surface (lower surface) 167 that is in close contact with the connecting surface (upper surface) 163. Note that in the explanation of the elastic water-sealing member 16, "inside" refers to the side of the movable seat plate 6 that is closer to the indoor visible surface 64 when fitted into the groove, and "outside" refers to the side that is further from the indoor visible surface 64 when fitted into the groove.

[0157] The connecting surface (upper surface) 163 of the rigid elastic part 16A consists of a first horizontal surface 1630 and a first inclined surface 1631 that slopes from the outside of the first horizontal surface 1630 toward the bottom surface 160, and the connecting surface (lower surface) 167 of the soft elastic part 16B consists of a second horizontal surface 1670 and a second inclined surface 1671 that slopes from the outside of the second horizontal surface 1670 toward the top surface 164, with the first horizontal surface 1630 and the second horizontal surface 1670, and the first inclined surface 1631 and the second inclined surface 1671 in close contact.

[0158] The upper surface of the elastic water-sealing member 16 is formed from the upper surface 164 of the soft elastic portion 16B, and the bottom surface of the elastic water-sealing member 16 is formed from the bottom surface 160 of the hard elastic portion 16A. 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, and the inner visible surface 161 of the hard elastic portion 16A and the inner visible surface 165 of the soft elastic portion 16B form the inner visible surface of the elastic water-sealing member 16.

[0159] Multiple ridges 1610 (three in the illustrated configuration; see Figure 27) extending in the panel width direction are formed on the inner surface 161 of the rigid elastic portion 16A. In other words, the inner surface of the rigid elastic portion 16A consists of the inner surface 161 and multiple ridges 1610 formed on the inner surface 161 that extend in the panel width direction.

[0160] The outer visible surface 166 of the soft elastic portion 16B consists of a first portion 1660 on the bottom surface 160 side and a second portion 1661 on the contact surface (upper surface) 164 side. As will be described later, the outer visible surface 166 of the soft elastic portion 16B consists of a first portion 1660 that is in close contact with the inner surface of the outer visible piece (indoor side rising piece 62) and a second portion 1661 that is located outside the groove. The outer visible portion 162 of the hard elastic portion 16A consists of a projection 1620 that protrudes inclined so as to be spaced apart from the bottom surface 160, and a recess 1621 adjacent to the upper side of the projection 1620 that allows elastic deformation of the projection 1620. When no external force is acting on the elastic water-stopping member 16, the tip of the projection 1620 is located slightly inward from the outer visible surface 166 of the soft elastic portion 16B, but may be approximately the same.

[0161] As shown in Figure 27, the rigid elastic portion 16A of the elastic water-sealing member 16 is fitted into the groove, the lower portion of the flexible elastic portion 16B of the elastic water-sealing member 16 is located inside the groove, and the upper portion is located outside the groove (above the groove). When the elastic water-sealing member 16 is fitted into the groove, the bottom surface of the elastic water-sealing member 16 (bottom surface 160 of the rigid elastic portion 16A) is in contact with the bottom (indoor side portion of the bottom surface 60), and the inner visible portion of the rigid elastic portion 16A is in contact with the first portion 640 of the inner visible surface of the groove (indoor side visible surface 64) via the protrusion 1610. The outer visible portion 162 of the rigid elastic portion 16A is in close contact with the inner surface of the outer visible piece (indoor side rising piece 62) via the projection 1620.

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

[0163] The inner visible portion of the rigid elastic part 16A abuts against the first portion 640 of the inner visible surface (indoor visible surface 64) of the groove via the protrusion 1610, acting as a force that presses the elastic water-stopping member 16 against the inner surface of the outer visible piece (indoor rising piece 62). As a result, the first portion 1660 of the outer visible surface 166 is compressed (1660') and adheres tightly to the inner surface of the outer visible piece (indoor rising piece 62), while the protrusion 1620 of the rigid elastic part 16A is elastically deformed upward, with its tip end in close contact with the inner surface of the outer visible piece (indoor rising piece 62).

[0164] When the elastic water-sealing member 16 is fitted into the groove, the projection 1620 of the outer visible portion 162 of the hard elastic portion 16A extends inclined so as to be separated from the bottom surface 160, and its tip is in close contact with the inner surface of the outer visible piece (indoor side rising piece 62), and it braces against the direction in which the elastic water-sealing member 16β would come out of the groove, preventing the elastic water-sealing member 16 from coming out of the groove.

[0165] The inner visible surface 161 of the rigid elastic portion 16A and the inner visible surface 165 of the soft elastic portion 16B are flush with each other. In a non-vertical compression position, the inner visible surface 165 of the soft elastic portion 16B is close to (separated from and in a non-contact state with) the second portion 641 of the inner visible surface of the groove (indoor side visible surface 64) (Figure 27). In a vertical compression position, the rigid elastic portion 16A is pressed in the height direction, causing the inner visible surface 165 to come into close contact with the second portion 641 (Figure 28).

[0166] In the vertically compressed position of the elastic water-sealing member 16β, the indoor lower surface 431 of the bottom panel body 4' is pressed against the upper surface 164 of the elastic water-sealing member 16β provided in the indoor groove of the movable seat plate 6, thereby forming a water-sealing structure in the indoor portion between the lower end of the bottom panel body 4' and the movable seat plate 6. Furthermore, as shown in Figure 28, in the vertically compressed position of the elastic water-sealing member 16β, when the elastic water-sealing member 16β is pressed in the height direction, 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 comes into close contact with the tip edge (upper edge) 620 of the outer visible piece (indoor rising piece 62), thereby forming a water-sealing structure.

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

[0168] The second portion 1661 of the outer surface 166 bulges outward (indicated as 1661') beyond the outer surface of the outer surface piece (indoor rising piece 62). Note that the bulging shape of the second portion 1661 shown in Figure 28 is just one example, and different bulging shapes may occur depending on how force is applied. As will be described later, under vertical and horizontal compression conditions, the bulging second portion 1661' of the outer surface 166 adheres tightly to the watertight rubber member 55.

[0169] On the outdoor side of the movable seat plate 6, a groove is formed extending in the longitudinal direction of the movable seat plate 6 (the width direction of the bottom panel 4) from the outdoor side of the bottom surface 60, the outdoor side rising piece 61, and the outdoor side facing surface 63, and an outdoor side elastic water-sealing member 16α is fitted into the groove. When the shutter curtain 1 is in the fully closed position, the outdoor side lower surface 430 of the panel body 4' comes into contact with the outdoor side elastic water-sealing member 16α, which will be explained later in the description of the airtight structure.

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

[0171] In this embodiment, a base elastic material 190' is provided on the bottom surface 60 of the movable seat plate 6, positioned between the end water-sealing members 191 at both ends, and a narrow intermediate water-sealing member 190 is fixed to the base elastic material 190'. The combined thickness of the intermediate water-sealing member 190 and the base elastic material 190' is approximately the same as the thickness of the end water-sealing member 191, however, in this embodiment, the lower surface of the narrow intermediate water-sealing member 190 bulges slightly downward in a cross-sectional view cut in the depth direction (see Figure 22). In this embodiment, the base elastic material 190' is made of flame-retardant rubber (chloroprene rubber, etc.), and the end water-sealing members 191 and the intermediate water-sealing member 190 are made of a flame-retardant rubber sponge (chloroprene rubber sponge, etc.) that is softer than the base elastic material 190', but these materials are illustrative and not limiting.

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

[0173] The intermediate waterproofing member 190 on the outdoor side is located inside the outdoor-facing piece 61 of the movable seat plate 6, and the intermediate waterproofing member 190 on the indoor side is located inside the indoor-facing rising piece 62 of the movable seat plate 6. As a result, when the shutter curtain 1 is in the fully closed position, the intermediate waterproofing member 190 is not exposed to the outside, which improves the aesthetic appearance, especially when viewed from the outside.

[0174] Because the narrow intermediate water-stopping member 190 has a small contact area with the floor surface, when pressed from top to bottom with the same force (the weight of the panel in the normal fully closed position, and the pressing pressure when vertically compressed), the surface pressure pressed against the floor surface is greater compared to a wider water-stopping member. This results in a tighter seal with the floor surface, improving airtightness and waterproofing performance.

[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 seat plate 6 is actually designed to be in close contact with the upper surface 90 of the lower frame or threshold embedded in the floor surface FL, and the depth of the upper surface 90 is limited (see Figure 31). Here, when the shutter curtain 1 is in a vertical or horizontal compression state, if water pressure acts on the shutter curtain 1 from the outdoor side toward the indoor side, there is a risk that the shutter curtain 1 will deform or displace toward the indoor side. At this time, the elastic water-stopping member 19 will be displaced toward the indoor side relative to the upper surface 90 of the lower frame, but since the indoor-side intermediate water-stopping member 190 is located inside the indoor-side rising piece 62, even if the bottom panel 4 is displaced toward the indoor side, the close contact between the indoor-side intermediate water-stopping member 190 and the upper surface 90 of the lower frame is maintained (see Figure 31).

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

[0177] [D-4] Water-sealing structure at both ends in the width direction 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 horizontal pressing member 82 on the outdoor side and the watertight rubber member 55 on the indoor side. The outdoor circumferential 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. By moving the chain up and down, each panel moves vertically up and down, with its outdoor and indoor side surfaces in contact with the fins 54, and the outdoor circumferential surfaces of the guide rollers 11 of the support shafts 10 at both widthwise ends being guided by the guide member 53, and the widthwise ends being guided by the watertight rubber member 55. The contact of the outdoor circumferential surface of the guide roller 11 with the guide member 53 restricts contact between the metal horizontal pressing member 82 and the widthwise end of the shutter curtain 1 during normal opening and closing and in the normal fully closed state.

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

[0179] When the shutter curtain 1, which is in the fully closed position, is subjected to vertical compression, the portion of the elastic water-sealing member 16 and the elastic water-sealing member 16β exposed on the indoor side (the second portion 1661 of the outer visible surface 166) bulges slightly inward relative to the indoor visible surfaces 21, 31, 41 and the indoor rising piece 62 (see Figure 7), increasing the degree of contact with the watertight rubber member 55. The indoor visible surface of the end water-sealing member 191 at the widthwise end of the elastic water-sealing member 19 is flush with the indoor visible surface 41 and the indoor rising piece 62 of the base plate 6, and together with the indoor visible surface 41 and the indoor rising piece 62 of the base plate 6, it adheres tightly to the watertight rubber member 55.

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

[0181] [D-5] Water-sealing structure of the bottom panel body The waterproof panel shutter according to 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 touches the ground or comes into contact with an obstacle, and the movable seat plate 6 moves relatively upward by a predetermined amount, the detection switch SW turns ON, and an obstacle detection signal is transmitted to the control unit of the opening / closing device M via the cord reel CR, causing the descending shutter curtain 1 to stop. As shown in Figure 1, the opening / closing device M is provided in the shutter storage space above the opening at a position close to one end in the width direction, and the cord reel CR is positioned in the lintel above the opening on the indoor side of the lifting / lowering 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 extends downward along the indoor side of the shutter curtain 1 when the shutter curtain 1 is raised or lowered. The lower end of the cable C1 is electrically connected to a relay cable C2 that penetrates the lower part of the indoor facing surface 41 of the bottom panel body 4'. The relay cable C2 extends into the bottom panel body 4' and is electrically connected to a cable C3 that extends from the detection switch SW.

[0182] As shown in Figures 22 and 32, the relay cable C2 comprises a first portion 110 located on the indoor side, a second portion 111 located on the bottom panel body 4', and a relay cable holder 112 located between the first portion 110 and the second portion 111. The relay cable holder 112 comprises a horizontally elongated cover portion 113 with an outer diameter larger than the through hole formed in the lower part of the indoor-facing surface 41 of the bottom panel body 4', and an insertion portion 114 that is inserted into the through hole. A hole 1130 is formed in the cover portion 113, and a disc-shaped contact body (rubber bush) 115, which is larger than the hole 1130 and has approximately the same dimensions as the inner diameter of the insertion portion 114, is provided at the base end of the internal space of the insertion portion 14 so as to close the hole 1130 from the inside, and the relay cable C2 is inserted through the contact body 115. An insertion point for the relay cable C2 is formed from the hole 1130 in the lid portion 113 and the internal space of the insertion portion 114. The relay cable C2 extends into the interior of the bottom panel body 4' through the internal space of the insertion portion 114. The first portion 110 is provided with a terminal 116 for electrically connecting to cable C1, and the second portion 111 is provided with a terminal 117 for electrically connecting to cable C3.

[0183] In the waterproof panel shutter according to this embodiment, a watertight line is formed on the indoor side of the shutter curtain 1 when it is fully closed, allowing water to enter the inside of the bottom panel body 4'. Therefore, it is necessary to prevent the water that has entered the inside of the bottom panel body 4' from entering the indoor side through the penetrations and relay cables C2.

[0184] As shown in Figure 32, the internal space of the insertion section (the space enclosed by the wall surface of the insertion section and the second surface of the contact body) is filled with sealant 118 so as to surround the intermediate cable C2. A waterproof treatment consisting of a rubber gasket 119 is applied between the inner surface of the cover 113 and the indoor-facing surface 41 around the through-hole. The intermediate cable C2 is fixed to a liner 120 provided on the back surface of the surface material forming the indoor-facing surface 41 by screws (not shown) while the cover 113 is in contact with the indoor-facing surface 41 via the rubber gasket 119. The rubber gasket 119 prevents water from entering the outdoors through the gap between the through-section formed on the indoor-facing surface 41 of the bottom panel body 4' and the cover 113, and the sealant 118 prevents water from entering the outdoors via the intermediate cable C2. The first portion 110 and terminal 116 located on the indoor side of the relay cable C2, and the cover portion 113 of the relay cable holder 112 are housed inside a cover 121 that is openable and detachable or removable on the indoor side surface 41, and the cable C1 extends to the outside through a hole formed in the cover 121 (see Figure 33).

[0185] [E] Airtight structure (smoke-blocking structure) and interlocking joint structure (fire-resistant structure) The waterproof shutter according to this embodiment can be used as a so-called management panel shutter, and in the normal closed state of a building opening, it functions as a fire-resistant and smoke-proof shutter. The panels 2, 3, and 4 that make up the shutter curtain 1 are made of steel panels (assembled from steel plates made of steel or stainless steel, with a plate thickness of, for example, 1.5 mm or more), and 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 in the fully closed position, a tongue-and-groove structure is formed between the lower part of the upper panel and the upper part of the lower panel of adjacent panels. Furthermore, in order to function as a fire-resistant and smoke-proof shutter in the normal closed state, it is equipped with an airtight structure to prevent smoke and flames from entering the interior from the exterior during a fire. In addition, the airtight structure according to this embodiment can also prevent smoke and flames from being discharged from the interior to the exterior during a fire.

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

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

[0188] As shown in Figure 19, in the fully closed state of the shutter curtain 1, in a cross-sectional view of the middle portion in the width direction of panel 3, the outdoor rising piece 303 at the upper end of the lower panel 3 is close to the outdoor side of the lower outdoor facing surface 302 at the lower end of the upper panel 3 (the outdoor rising piece 303 is located at the step formed by the lower edge portion 301 and the lower outdoor facing surface 302), the outdoor lower surface 330 of the lower end portion 33 of the upper panel 3 is close to the outdoor upper surface 320 of the upper end portion 32 of the lower panel 3 (in this embodiment they are spaced apart and not in contact), and the outdoor inclined surface 331 of the lower end portion 33 of the upper panel 3 is close to the outdoor inclined surface 321 of the upper end portion 32 of the lower panel 3 (in this embodiment they are spaced apart and not in contact). In this configuration, the buffer / airtight member 15 provided on the central horizontal plane 332 of the lower surface portion 33 at the lower end of the upper panel 3 is in contact with the central horizontal plane 322 of the upper surface portion 32 at the upper end of the lower panel 3. However, at both ends of the panel 3 in the width direction, the lower end airtight member 18 at the lower end of the upper panel 3 is in close contact with the outdoor upper surface 320 and the outdoor inclined surface 321 of the upper surface portion 32 at the upper end of the lower panel 3. The left and right end room outer airtight members 17 are positioned outside the panel width direction edge 3030 of the outdoor rising piece 303 (see Figure 36). The outer surface of the end room outer airtight member 17 is substantially flush with the main surface portion 300 of the outdoor facing surface 30 of the panel 3 and the outer surface of the outdoor rising piece 303 (in this embodiment, it is slightly located on the outdoor side) (see Figures 15 and 36).

[0189] [E-2] Airtight structure between the bottom panel body and the base plate in a fully closed shutter curtain When the shutter curtain 1 is fully closed, an airtight structure is formed between the bottom panel body 4' and the movable seat plate 6 in the bottom panel 4. In this embodiment, the airtight structure is formed on the outdoor side portion of the bottom panel 4 of the shutter curtain 1 when it is fully closed. As shown in Figure 23, the outdoor side portion of the movable seat plate 6 has grooves that extend in the longitudinal direction of the movable seat plate 6 (the 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-sealing member 16α is fitted into the grooves. When the shutter curtain 1 is fully closed, the outdoor side lower surface 430 of the panel body 4' abuts against the upper surface of the outdoor side elastic water-sealing member 16α, thereby forming an airtight structure across the entire width between the bottom panel body 4' and the movable seat plate 6.

[0190] [E-3] Airtight structure of the lower 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 of the bottom panel 4 (in this embodiment, the movable seat plate 6) and the floor surface. An elastic water-sealing member 19 is provided along the entire width of the bottom surface 60 of the movable seat plate 6, and the elastic water-sealing member 19 also functions as an airtight member by contacting the floor surface due to the weight of the shutter curtain 1 (see Figure 23).

[0191] [E-4] Airtight structure at both ends in the width direction of the shutter curtain in the fully closed position As shown in Figures 5 and 34, 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 horizontal pressing member 82 on the outdoor side and the watertight rubber member 55 on the indoor side, and the outdoor side circumferential 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 34-36, a smoke-blocking material 56 is provided at the tip of the outdoor-side folded piece 500 of the guide body 5, extending in the height direction. The smoke-blocking material 56 is designed to continuously contact both ends in the width direction of the panel on the outdoor side of the shutter curtain 1 when it is in the fully closed position (the parts located outside the guide body 5) in the height direction. More specifically, the outer side portions of the shutter curtain 1 in the fully closed position consist of the following: the outer end airtight members 17 attached to the main surface 200 and the lower outer surface 202 of the outer surface 20 of the top panel 2; the outer end airtight members 17 attached to the main surface 300 and the lower outer surface 302 of the outer surface 30 of the panel 3; the outer surface 40 of the bottom panel 4; the second portion 1661 (Figure 23), which is the exposed surface at both ends in the width direction of the outer elastic water-stopping member 16α; the outer side rising piece 61 of the movable seat plate 6; and the outer 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 inward by horizontal pressure, contact between the smoke-blocking material 56 and both ends in the width direction of the outer side portion of the shutter curtain 1 is maintained (see Figure 6).

[0193] An upper smoke-blocking material 56' is provided in the lintel portion 130 above the opening, extending in the width direction of the opening. The upper smoke-blocking material 56' is in contact with the outdoor-facing surface 20 of the top panel 2, and both ends in the width direction 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 bag shape out of a fire-resistant sheet, with the base end fixed to the tip of the outdoor-facing folded piece 500, and the curved tip portion is in contact with both ends in the width direction of the outdoor side of the shutter curtain 1. However, 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 the shutter curtain in the fully closed position will be described based on Panel 3. In this embodiment, an outdoor airtight member 17α is provided along the lower edge 301 at the upper end of the lower outdoor facing surface (stepped facing surface) 302 of Panel 3, extending across the entire width of the panel. When the shutter curtain is fully closed, the upper end of the outdoor rising piece 303 of the lower panel 3 is in close contact with the outdoor airtight member 17α at the lower end of the upper panel 3, thereby closing the gap on the outdoor side 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 portion of the outdoor airtight member 17α is substantially flush with the outdoor facing surface (main surface portion 300) and the outdoor rising piece 303 of Panel 3. Both ends of the outdoor airtight member 17α in the width direction are in contact with the left and right smoke barriers 56. In this embodiment, the outdoor 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 (another embodiment 2) Referring to Figure 39, another embodiment of the airtight structure of the 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 the panel on 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 closing the gap on the outdoor side 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 17β is substantially flush with the outdoor-side facing surface 30 of panel 3, and both ends of the outdoor-side airtight member 17β in the width direction are in contact with the left and right smoke-blocking materials 56. In this embodiment, the outdoor airtight member 17α and the buffer / airtight member 15 are independent of each other.

[0196] [E-7] Interlocking structure between panels in a fully closed shutter curtain In this embodiment, in the upper and lower adjacent panels of the shutter curtain 1 in the fully closed position, a watertight structure is formed between the indoor side of the lower portion of the upper panel and the indoor side of the upper portion of the lower panel. Between the lower portion of the upper panel and the upper portion of the lower panel, a rabbet structure is formed on the outdoor side of the watertight structure. The rabbet structure between the upper and lower adjacent panels of the shutter curtain 1 according to this embodiment will be explained based on the fitting of the upper and lower adjacent panels 3 in the shutter curtain 1 in the fully closed position. The lower surface portion 33 of the upper panel 3 comprises 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). The upper surface portion 32 of the lower panel 3 comprises 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 fully closed, the lower end of the upper panel 3 and the upper end of the lower panel 3 interlock to form a rabbet structure, where the trapezoidal portion of the lower surface 33 of the upper panel 3 (outdoor-side inclined surface 331, central horizontal surface 332, indoor-side inclined surface 333) and the trapezoidal portion of the upper surface 32 of the lower panel 3 (outdoor-side inclined surface 321, central horizontal surface 322, indoor-side inclined surface 323) fit together. In this embodiment, the outdoor-side rising piece 303 of the lower panel 3 is also positioned close to and facing the lower outdoor-side facing surface 302 of the upper panel 3, further forming a rabbet structure. In this embodiment, the synergistic effect of the airtight structure and the rabbet structure improves fire and smoke prevention performance.

[0197] [E-8] Operation as a fire shutter The waterproof shutter according to this embodiment is an electric shutter that, during normal operation, descends electrically to close the opening. When the opening is fully closed, as described above, an airtight structure (smoke-blocking structure) is formed on the outdoor side, and a fire-resistant interlocking structure (fire-resistant structure) is formed between adjacent panels vertically. When the opening is fully closed (non-compressed 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 vertically compressed position horizontally, so that the shutter curtain 1 in the fully closed position is in a state of both vertical and horizontal compression. Even in this state, the airtight structure (smoke-blocking structure) is maintained (see Figure 6), and the interlocking structure (fire-resistant structure) is maintained (see Figure 20).

[0198] The waterproof shutter according to this embodiment is equipped with a self-weight lowering mechanism for lowering the shutter curtain 1, which is in the fully open position, by its own weight in the event of a fire or the like. More specifically, as shown in Figure 40, the waterproof shutter is equipped with an automatic closing device that is activated by the input of a fire detection signal, and an operating mechanism that releases and returns the brake of the opening / closing mechanism M. When the automatic closing mechanism is activated, the operating mechanism returns to the brake release position, releases the brake, lowers the shutter curtain by its own weight, and the shutter curtain descends to the fully closed position and stops in the fully closed position. If an obstacle hits the bottom plate 6 at the lower end of the shutter curtain 1 while it is descending by its own weight, an obstacle detection signal is transmitted to the operating mechanism, and in response to the input of the obstacle detection signal, the operating mechanism returns to the brake return position, the brake is returned, and the shutter curtain that was descending by its own weight stops. When the obstacle is removed, the input of the obstacle detection signal disappears, the operating mechanism returns to the brake release position again, releases the brake, lowers the shutter curtain by its own weight again, and the shutter curtain descends to the fully closed position and stops in the fully closed position.

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

[0200] In the second configuration, compression is possible regardless of whether the fully closed shutter curtain descends by gravity or by electric descent. 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 fully closed shutter curtain. 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 fully closed shutter curtain. [Explanation of Symbols]

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

Claims

1. A shutter curtain composed of multiple steel panels, The left and right guide bodies that receive the widthwise ends of the shutter curtain, In a waterproof panel shutter equipped with, The indoor portion of the lower part of the upper panel, located on the upper side, has an indoor vertical surface and an indoor lower surface, and the outdoor portion of the lower part has an outdoor lower surface, and the indoor lower surface is located below the outdoor lower surface. The indoor portion of the upper part of the lower panel, located below the upper panel, has an indoor vertical surface, a groove extending in the panel width direction, and a long elastic waterproofing member fitted into the groove; the outdoor portion of the upper part has an outdoor upper surface, and the elastic waterproofing member is located below the outdoor upper surface. In the panels adjacent to the top and bottom of a shutter curtain in a fully closed position, the lower indoor surface of the upper panel abuts against the elastic water-sealing member of the lower panel, thereby forming a water-sealing structure 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. Waterproof shutter.

2. In the panels adjacent to the top and bottom of a shutter curtain in a fully closed position, the lower outdoor surface of the upper panel approaches or abuts against the upper outdoor surface of the lower panel to form an outdoor proximity or abutment portion, the indoor vertical surfaces of the upper panel and the lower panel approach or abut each other, and the lower indoor surface of the upper panel abuts against the elastic water-stopping member of the lower panel, thereby forming a water-stopping structure located below the outdoor proximity or abutment portion. A waterproof shutter according to claim 1.

3. The lower portion of the upper panel is located between the indoor portion and the outdoor portion and has a concave portion, The upper portion of the lower panel is located between the indoor portion and the outdoor portion and has a convex portion. In the fully closed position, the concave portion and the convex portion are positioned on the outdoor side and above the water-stopping structure so that they fit together. A waterproof shutter according to either claim 1 or 2.

4. At least one of the concave portion and the convex portion is provided with a cushioning material extending in the panel width direction, When the shutter curtain is fully closed, the lower portion of the upper panel and the upper portion of the lower panel are in contact with the elastic water-stopping member and the cushioning material. A waterproof shutter according to claim 3.

5. The waterproof shutter is provided with a vertical compression means for compressing the shutter curtain in the vertical direction when it is in a fully closed position, During vertical compression, the vertical compressive force is transmitted to the lower panel via the cushioning material and the elastic water-sealing member. A waterproof shutter according to claim 4.

6. When the shutter curtain is in the fully closed position, the lower outdoor surface and the upper outdoor surface are in close proximity. During vertical compression, the lower outdoor surface of the lower portion comes into contact with the upper outdoor surface of the upper portion, pressing downwards and thereby transmitting a vertical compressive force to the lower panel. A waterproof shutter according to claim 5.

7. On the outdoor side of the lower portion of the upper panel, a stepped outdoor stepped surface is formed, which is located on the indoor side relative to the outdoor surface of the upper panel. On the outdoor side of the upper portion of the lower panel, an outdoor-side rising piece is formed that is flush with the outdoor-side facing surface of the lower panel. When the lower portion and the upper portion approach each other in the height direction, the outdoor-side stepped surface acts as a guide surface, and when the shutter curtain is fully closed, the outdoor-side rising piece is positioned on the outdoor side of the outdoor-side stepped surface. A waterproof shutter according to any one of claims 1 to 6.

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