Water stop device

Abstract

To provide a water cutoff device of a high reliability which functions as a passage in normal time not necessary to stop flooding, and prevents water flooding by reliably erecting water cutoff plates by buoyant force, when sudden flooding occurs by disasters.SOLUTION: A water cutoff device 1 comprises: an elastically deformable hinge body 11 extending in the span direction of a water cutoff plate 10 to support the water cutoff plate 10 to be freely raised and lowered; a hinge fitting plate 12 integrally extending from the water cutoff plate 10 and having a lower face to which an upper end part 50 of the hinge body 11 is fixed; and hinge support means 13 which, in a course from a lowered state of the water cutoff plate 10 to a raised state, regulates movement of the hinge body 11 including the hinge fitting plate 12 toward the hydraulic pressure direction, and, in a rising state of the water cutoff plate 10, regulates the movement of the hinge body 11 including the hinge fitting plate 12 toward the hydraulic pressure direction and the vertical direction. Thus, the reliability of the cutoff device 1 can be improved.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a water stop device in which a water stop plate (door body) installed on the floor of a passageway rises up due to the buoyancy of water to stop water. [Background technology]

[0002] In recent disasters such as heavy rain, floods, and high tides, it is necessary to prevent water from seeping in through passageways in buildings and facilities, requiring rapid waterstop measures in areas that normally function as passageways for people and vehicles. To address this issue, waterstops are installed; however, in passageways of facilities and apartment buildings that are used by many people, establishing and maintaining a system for managing the operation and maintenance of waterstops can be problematic. To address this issue, automatic waterstop devices that normally function as passageways for people and vehicles and automatically rise up and stop water using buoyancy in the event of sudden flooding due to a disaster or other event are becoming more common. A buoyancy-type waterproofing device is known in which a waterstop installed on the floor of a passageway rises up using the buoyancy of water that reaches the passageway (see Patent Document 1).

[0003] In conventional waterstop devices, including the buoyancy-type waterproofing device described in Patent Document 1, the waterstop is configured to freely rise and fall by rotating around a hinge body. Furthermore, because the waterstop functions as part of the passageway floor, it must support the load acting on the passageway floor. When raised, it must also stop water and safely maintain the load due to water pressure. However, there are problems with the hinge body malfunctioning due to deformation of the hinge body caused by the load from the passageway floor and the influence of debris (sand, dust, etc.) on the passageway floor. Specifically, the hinge body is generally composed of a hinge consisting of an axle pin and a pair of rotating members that rotate around the axle pin. The load from the passageway floor and the influence of debris on the passageway floor can cause the hinge body to deform, or sand, dust, etc. can enter the gap between the hinge body's axle pin and the rotating member, resulting in abnormally large rotational resistance. This can cause the hinge body to malfunction due to buoyancy in the event of a disaster, reducing reliability.

[0004] In contrast, Patent Document 2 discloses a undulating water intrusion prevention gate that uses a hinge body that does not use hinges. The hinge body described in Patent Document 2 is made of a flexible rubber plate or the like. Unlike the hinges that make up the hinge body described above, this hinge body is not structured so that its ease of rotation is impaired by the influence of sand, dust, etc. However, the flexible hinge body described in Patent Document 2 is bolted to the door body and the pit receiving metal fittings by a pair of lower holding plates, but there is a risk that foreign matter such as sand or dust will get caught in the gap formed between the pair of lower holding plates, causing poor rotation.

[0005] That is, when the door body is in a collapsed state, there is a gap between the pair of lower pressure plates (see Fig. 2 of Patent Document 2), and this gap is constantly clogged with foreign matter such as sand, dust, etc. Also, when the door body is in an upright state (see Fig. 1 of Patent Document 2), the pair of lower pressure plates abut against each other and there is no gap, but in the process of the door body changing from a collapsed state to an upright state, foreign matter such as sand, dust, etc. may get caught in the gap between the pair of lower pressure plates, hindering smooth uprighting.

[0006] Furthermore, if foreign matter such as sand or dust gets caught in the gap between the pair of lower pressure plates, the lever action will generate a large tension in the hinge body, which may cause problems such as the hinge body being detached from the lower pressure plate. Furthermore, while the door body needs to function as an aisle when it is in its folded position, the gap between the pair of lower pressure plates forms a groove of a size that cannot be ignored, which can cause pedestrians to trip and hinder the operation of devices with small wheels such as those used in strollers.

[0007] Furthermore, while the flexible hinge member described in Patent Document 2 can withstand water pressure loads by being reinforced, it is difficult for the flexible hinge body itself to support the load when bearing pressure and shear force are applied. That is, during the operation process from when the pair of lower pressure plates come into contact with each other and tension is generated in the overload prevention belt, until the door body is held upright, the hinge body itself cannot support the bearing pressure and shear force. Therefore, during the process of elastic deformation of the hinge body, the door body needs to be raised so that it can withstand the transmitted bearing pressure and shear force. However, because this structure is not established, there is a risk of malfunctions such as the hinge body's fixed part coming loose. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-142030 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-122246 Summary of the Invention [Problem to be solved by the invention]

[0009] As mentioned above, conventional water stopping devices, including those disclosed in Patent Documents 1 and 2, function as a floor for passageways through which people and vehicles pass when there is no need to stop water from entering or exiting, and are not yet sufficiently reliable as water stopping devices that can reliably stand up in the event of a sudden disaster.

[0010] The present invention has been made in consideration of these points, and aims to provide a highly reliable water stopping device that functions as a passageway when there is no need to stop water intrusion, and that, in the event of a sudden flood due to a disaster or the like, reliably rises up using buoyancy to prevent water intrusion. [Means for solving the problem]

[0011] As a means for solving the above-mentioned problems, the present invention provides a waterstop device that prevents water from entering a flood-prevented area by raising a waterstop plate due to the buoyancy of water, the waterstop device comprising: an elastically deformable hinge body that extends along the span direction of the waterstop plate to support the waterstop plate so that it can rise and fall freely; and a hinge body that extends integrally from the waterstop plate and has a lower surface on which the hinge body is attached. Upper wall and hinge support means for restricting movement of the hinge body including the hinge mounting plate in the water pressure direction during the process of the waterstop changing from a collapsed state to an upright state, and for restricting movement of the hinge body including the hinge mounting plate in the water pressure direction and in the vertical direction when the waterstop is in the upright state. The hinge body is formed in a U-shape in vertical cross section along a direction perpendicular to the span direction of the waterstop, with its open side facing the water storage area when the waterstop is in a laid-down state, and the upper wall portion of the hinge body is fixed to the hinge mounting plate, and the lower wall portion of the hinge body is fixed to a support portion. It is characterized by the following.

[0012] In the invention of claim 1, one end of the hinge body is fixed to the underside of the hinge mounting plate. Therefore, when the waterstop functions as a passageway when it is collapsed, the upper surface of the waterstop, which serves as the floor of the passageway, is smooth and free of any unevenness, such as grooves, that could obstruct passage. With the hinge body alone, the hinge body, including the hinge mounting body of the waterstop, may move (displace) in an unintended direction due to loads such as water pressure during the process of the waterstop changing from its collapsed state to its upright state, and during the waterstop's upright state, making it difficult to maintain its position. In view of this, the invention of claim 1 uses a hinge support means that restricts movement of the hinge body, including the hinge mounting plate, in the direction of water pressure (approximately horizontal direction) during the process of the waterstop changing from its collapsed state to its upright state, and restricts movement of the hinge body, including the hinge mounting plate, in the direction of water pressure (approximately horizontal direction) and vertical direction during the waterstop's upright state. As a result, when the waterstop device is in operation, the hinge body including the hinge mounting plate is maintained in its position without moving (displacing) in an unintended direction, and the load in the direction of water pressure (approximately horizontal) transmitted to the hinge body including the hinge mounting plate, and in the upright state, the load in the direction of water pressure (approximately horizontal) and vertically downward, are safely transmitted to the pit through the abutment between the hinge mounting plate of the waterstop and the hinge support means. Note that waterstops are usually provided with extendable and foldable support legs that maintain the upright state, and these support legs enable the load due to water pressure acting on the waterstop to be transmitted to the bottom of the pit. Furthermore, when the waterstop is in its collapsed state, the hinge body is U-shaped in vertical cross section, with the water storage area side, opposite the flood-prevented area side, open. By positioning the hinge body below the hinge mounting plate in this state, the hinge support means (the support portion and each plate-shaped support member) can be compactly arranged in the space from the closed side of the hinge body to the flood-prevented area side. The upper wall of the hinge body is bolted to the hinge mounting plate, and the lower wall is bolted to, for example, a mounting base in the pit. Therefore, the vertical wall of the hinge body resists upward displacement of the waterstop as it moves up to its upright position. In other words, due to the shape and fixation state of the hinge body, even if buoyancy acts on the waterstop and a force pulling the hinge body upward acts on the hinge body during the upright movement, the waterstop, including the hinge body, is reliably maintained in its position without moving in an unintended direction. This prevents the hinge mounting plate, and ultimately the waterstop, from floating up, which can be an unstable behavior.

[0013] The invention of claim 2 is characterized in that, in the invention described in claim 1, the hinge support means comprises a support portion extending integrally from the end face of the hinge mounting plate and extending along the span direction of the waterstop, moving approximately in an up-and-down direction as the waterstop plate rises and falls, and a plate-shaped support member that accommodates the support portion and has a notched groove portion that determines the range of movement of the support portion, and is arranged upright at intervals along the span direction of the waterstop.

[0014] In the invention of claim 2, when the waterstop changes from a collapsed state to an upright state, the support parts extending integrally from the end faces of the hinge mounting plate move downward along the notched grooves of each plate-shaped support member, thereby restricting movement of the hinge body including the hinge mounting plate in the water pressure direction. Also, when the waterstop is in the upright state, the support parts extending integrally from the end faces of the hinge mounting plate come into contact with the bottom surfaces of the notched grooves of each plate-shaped support member, thereby restricting movement of the hinge body including the hinge mounting plate in the vertical direction as well as movement in the water pressure direction.

[0017] Claim 3 The invention is 1 In the invention described in the item (1), the hinge body is made of a rubber material reinforced with reinforcing fibers, and The aforementioned The upper wall portion is fixed to the hinge mounting plate so as to be sandwiched from above and below, and the upper wall portion is fixed to the hinge mounting plate so as to be sandwiched from above and below. The aforementioned The lower wall portion is sandwiched from above and below, The aforementioned Fixed to the support area and facing The aforementioned Upper wall and The aforementioned The lower wall parts are both facing the open side. The upper wall portion and the lower wall portion It is characterized by being formed with a gradually increasing thickness.

[0018] Claim 3In the invention, the hinge body is made of a rubber material reinforced with reinforcing fibers, which provides both bending and watertightness. The reinforcing fibers primarily transmit the applied load, thereby suppressing unintended large deformation of the hinge body. The upper wall of the hinge body is fixed to the hinge mounting plate while being clamped from above and below, and the lower wall is fixed to a support such as a mounting base in the pit while being clamped from above and below. Both the upper and lower wall portions are formed to gradually increase in thickness toward the open side. As a result, the hinge body can resist loads acting in a direction that would pull it out due to water pressure (preventing pull-out) during processes including the erection of the waterstop. This also prevents unintended large deformation of the hinge body during processes including the erection of the waterstop. This ensures that when the water stop device is in operation, the hinge body, and therefore the water stop plate, maintain their position without moving in an unintended direction, improving the positional accuracy of the water stop plate in both the upright and laid-down states and improving the reliability of the opening and closing operation. [Effects of the Invention]

[0019] The water stop device of the present invention functions as the floor of a passageway for people, vehicles, etc. to enter and exit when there is no need to stop water from entering, and in the event of sudden flooding due to a disaster or other event, the water stop plate will rise up due to buoyancy, ensuring high reliability and stopping the water. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view showing the entire water stopping device according to an embodiment of the present invention, with the water stopping plate in an upright position. [Figure 2] FIG. 2 is a side view showing a state in which the waterstop plate of the waterstop device according to the embodiment of the present invention is laid down and stored in a pit. [Figure 3] FIG. 3 is an enlarged view of part A in FIG. [Figure 4] FIG. 4 is a side view showing a state in which the waterstop plate of the waterstop device according to the embodiment of the present invention is standing upright. [Figure 5] FIG. 5 is an enlarged view of part B in FIG. [Figure 6] FIG. 6 is a plan view showing the watertight structure between the spanwise (longitudinal) end and side of the waterstop plate of the waterstop device according to the embodiment of the present invention. [Figure 7] FIG. 7 is a plan view showing the watertight structure between the waterstop plate bodies of the waterstop device according to the embodiment of the present invention. [Figure 8] FIG. 8 is a perspective view showing a drainage structure from within a pit in which a waterstop plate of a waterstop device according to an embodiment of the present invention is housed. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. As shown in Figure 1, a water stop device 1 according to an embodiment of the present invention stops the flow of water that has flowed into a passage 5 surrounded by a bottom 3 and a pair of opposing side sections 4, 4. A smooth contact plate 7 is embedded in the surface of the side section 4 on the passage 5 side. The function of the contact plate 7 will be described in detail later. As shown in Figures 1 and 2, the water stop device 1 according to this embodiment is configured so that when water enters the pit 16 through each water passage cover 20 as the water level in the water storage area rises, the water stop plate 10 rotates around the hinge body 11 due to buoyancy and stands up, thereby stopping the water.

[0022] In the following explanation, for convenience of explanation, the width direction of the passage 5 will be referred to as the span direction, and the direction perpendicular to the span direction will be referred to as the front-to-rear direction. The passage 5 is divided into a flood prevention area and a water retention area, with the water stop device 1 of this embodiment installed as the boundary. In Fig. 1, the flood prevention area is on the upper right side of the water stop device 1 of this embodiment, and the water retention area is on the lower left side. In Figs. 2 to 5, the flood prevention area is on the right side of the figure, and the water retention area is on the left side of the figure, with the water stop device 1 of this embodiment as the boundary.

[0023] Referring to Figures 1 and 2, the water stop device 1 of this embodiment comprises a water stop plate 10 extending across the entire span between a pair of side portions 4, 4, an elastically deformable hinge body 11 extending along the span (longitudinal direction) of the water stop plate 10 to support the water stop plate 10 so that it can be raised and lowered freely, a hinge mounting plate 12 extending integrally from the water stop plate 10 and having an upper end 50 (one end) of the hinge body 11 fixed to its underside, and a hinge support means 13 that restricts the movement of the hinge body 11 including the hinge mounting plate 12 in the water pressure direction when the water stop plate 10 changes from a collapsed state to an upright state, and restricts the movement of the hinge body 11 including the hinge mounting plate 12 in the water pressure direction and vertical direction when the water stop plate 10 is in the upright state.

[0024] 1 and 2, when water stopping is not required, the waterstop 10 is housed in a pit 16 provided in the bottom 3 of the passage 5 across the entire span, and functions as the passage 5. The pit 16 is recessed in the bottom 3 of the passage 5 across the entire span. The depth of the pit 16 is approximately the thickness of the waterstop 10. The bottom 18 of the pit 16 is smooth so that the waterstop 10 is evenly supported when it is laid down and stored. When a flood or other inundation occurs and the water level in the water storage area rises, multiple water passage lids 20 are provided along the span on the water storage area side of the pit 16 so that water can reliably enter the pit 16 from the water storage area side, generating buoyancy in the waterstop 10. Each water passage lid 20 is provided corresponding to each waterstop body 10A described below. Since each water passage cover 20 needs to function as the floor of the passage 5, its length in the front-to-rear direction is kept to a minimum, and a grating or the like that allows water to pass through is used.

[0025] Referring to Figure 1, the waterstop 10 is constructed as a unit by connecting multiple waterstop bodies 10A, 10A together from the standpoints of economy and quality assurance. The live load of the waterstop 10 needs to be safely transmitted to the bottom 18 of the pit 16 via each waterstop body 10A, 10A, but the waterstop body 10A also needs to function as a floating body, so it needs to be structured to be lightweight. Referring to Figures 6 and 7, the waterstop body 10A has a corrugated structure in which multiple U-shaped girders 23, each extending in the fore-and-aft direction, are welded to the underside of the floor plate 22 at intervals along the span direction.

[0026] As a result, the waterstop 10, which is made up of multiple waterstop bodies 10A, 10A, is lightweight while maintaining the required strength. Each waterstop body 10A is constructed by attaching a low-density foam material 25 to the space formed by the corrugated structure described above, so that sufficient buoyancy acts on the waterstop 10. Depending on installation conditions such as the length along the span direction of the passageway 5, the waterstop 10 can also be constructed with just the waterstop body 10A. In addition, in waterstops 10 according to other embodiments, a sealed box structure or a low-density resin material with sufficient strength can be used to achieve both strength and lightweightness in the waterstop 10. As such, the specific configuration of the waterstop body 10A is not limited.

[0027] 1 and 2, a floor panel 22 is provided corresponding to each waterstop body 10A. When the waterstop 10 is in a collapsed state, the floor panel 22 functions as the floor surface of the passage 5. The floor panel 22 is sized so that there are no steps or harmful gaps or grooves between the water passage cover 20 and the cover member 73 (described later) and the floor surface extending in the front-to-rear direction that continues to the pit 16. Non-slip steel plates such as checkered steel plates are used for the floor panel 22 to ensure functionality as a passage 5. Referring to FIG. 3, a floor panel hinge mounting portion protrudes from the floor panel 22 toward the hinge body 11 (described later). A hinge mounting panel 12 (described later) is fixed to the underside of the floor panel hinge mounting portion 28. A rod-shaped support member 66 (support portion) of the hinge support means 13 (described later) is fixed to the end surface of the hinge mounting panel 12.

[0028] 1 and 6, the floor panels 22 of each waterstop body 10A adjacent to the pair of side sections 4 are provided with floor panel seal mounting portions 31 that protrude from the foam materials 25 toward the pair of side sections 4. Referring to FIG. 6, a plate-shaped watertight rubber 33 is bolted to the underside of the floor panel seal mounting portion 31 by a mounting member 34. As a result, the tip of the watertight rubber 33 is slidably pressed against the contact plate 7 embedded in the side section 4. This watertight rubber 33 ensures watertightness between the spanwise (longitudinal) end of the floor panel seal mounting portion 31 of the floor panel 22 and the side section 4.

[0029] 1, the contact plate 7 embedded in the side portion 4 is formed in a shape such that the tip of the watertight rubber 33 comes into contact with the contact plate 7 when the waterstop 10 changes from a lying down state to an upright state, thereby ensuring watertightness between the side portion 4 and the waterstop 10. Also, referring to FIG. 7, in the gap 35 between the floorboards 22, 22 between adjacent waterstop bodies 10A, 10A, a watertight rubber 36 is crimped to the underside of each floorboard 22, 22 by an attachment member 37 so as to straddle the gap 35. This ensures watertightness between the floorboards 22, 22 of each waterstop body 10A, 10A.

[0030] 2 and 3, each waterstop body 10A has a hinge mounting plate 12 integrally protruding therefrom, extending from the top of the foam material 25 toward the hinge body 11. The hinge mounting plate 12 is supported by a plurality of reinforcing ribs 39, 39 arranged at intervals along the span direction. The hinge mounting plate 12 is fixed by abutting against the underside of the floor panel hinge mounting portion 28 of the floor panel 22. Referring to FIGS. 1, 2 and 4, extendable and foldable support legs 40 are provided between the upper end of each waterstop body 10A and the bottom 18 on the water storage area side of the pit 16, to keep the waterstop body 10A upright.

[0031] The support legs 40 are provided corresponding to each waterstop body 10A. The support legs 40 are configured with a link structure. One end of an upper link 42 is rotatably connected to an upper pin 41 provided at the upper end of the waterstop body 10A. The other end of the upper link 42 is rotatably connected to one end of two lower links 44, 44 via an intermediate pin 43. The other end of each lower link 44, 44 is rotatably supported by a lower pin 45 located on the water storage area side at the bottom 18 of the pit 16.

[0032] 2, when the waterstop 10 (each waterstop body 10A, 10A) is in a collapsed state, the upper link 42 and each lower link 44, 44 of each support leg 40 are folded below the waterstop 10, and the entire waterstop body 10A including each support leg 40 is stored in the pit 16. On the other hand, referring to FIG. 4, when the waterstop 10 (each waterstop body 10A, 10A) is fully erected, the upper link 42 and each lower link 44, 44 of each support leg 40 are extended, thereby maintaining the waterstop 10 in an erected state. In this erected state, part of the water pressure can be safely transmitted to the pit 16 via the support leg 40. In this embodiment, the upper link 42 and each lower link 44, 44 are used as the support leg 40, but other structures that can both support tension and be stored, such as belts, may also be used.

[0033] Referring to Figures 3 and 5, and also to Figures 2 and 4 as appropriate, a hinge body 11 is fixed below the hinge mounting plate 12 of each waterstop main body 10A. The hinge body 11 is made of a rubber material containing reinforcing fibers, which is elastically deformable, has low bending resistance, and is sufficiently strong against tension. The reinforcing fibers transmit tensile loads and suppress harmful elongation in the tensile direction while maintaining the flexibility (elastic deformation) of the hinge. In this embodiment, for example, nylon fibers are used as the reinforcing fibers. In addition, the flexible rubber material facilitates the flexibility of the hinge and adheres closely to the corresponding hinge mounting plate 12 and the mounting surface 61 of the mounting base 58 (described later), thereby ensuring watertightness at each of the contact areas. In this embodiment, for example, chloroprene rubber is used as the rubber material.

[0034] Referring to FIG. 3, when the waterstop 10 is in the collapsed state, the hinge body 11 has a U-shaped cross section, which is made up of opposing upper and lower wall portions 50 and 51, and vertical wall portions 52 connected to the ends of the upper and lower wall portions 50 and 51. The hinge body 11 extends across the entire span (longitudinal direction) of the waterstop main body 10A. The open side of the hinge body 11 faces the water storage area, and the closed side faces the flood prevention area. The upper wall portion 50 of the hinge body 11 is formed to be thicker toward the open side. More specifically, when the waterstop 10 is in the collapsed state, the upper surface of the upper wall portion 50 of the hinge body 11 extends horizontally, and the lower surface is formed to be inclined downward toward the open side. An upper fixing plate member 55 is disposed on the underside of the upper wall portion 50 of the hinge body 11. The upper fixing plate 55 extends over the entire span (longitudinal) area of ​​the waterstop main body 10A. The upper surface of the upper fixing plate 55 is inclined downward toward the open side of the hinge body 11 so as to contact the lower surface of the upper wall portion 50 of the hinge body 11. Meanwhile, the lower surface of the upper fixing plate 55 extends horizontally so as to contact the upper surface of the lower fixing plate 56.

[0035] The lower wall 51 of the hinge body 11 is formed so that its thickness increases toward the open side. More specifically, when the waterstop 10 is in its laid-down state, the lower wall 51 of the hinge body 11 is formed so that its lower surface extends horizontally and its upper surface slopes upward toward the open side. A lower fixing plate 56 is disposed on the upper surface of the lower wall 51 of the hinge body 11. The lower fixing plate 56 extends over the entire span (longitudinal) area of ​​the waterstop main body 10A. The lower surface of the lower fixing plate 56 slopes upward toward the open side of the hinge body 11 so as to contact the upper surface of the lower wall 51 of the hinge body 11. Meanwhile, the upper surface of the lower fixing plate 56 extends horizontally so as to contact the lower surface of the upper fixing plate 55. The upper fixing plate 55 and the lower fixing plate 56 are arranged in contact with each other in an area surrounded by the upper wall 50, lower wall 51, and vertical wall 52 of the hinge body 11. Furthermore, within the pit 16, a mounting base 58 protrudes upward from the bottom 18 on the flood-prevention area side. The mounting base 58 extends within the pit 16 in the span direction between the pair of side portions 4, 4. The mounting base 58 is formed with an L-shaped cross section, consisting of a mounting leg 60 extending upward from the bottom 18 of the pit 16, and a mounting surface 61 extending horizontally from the upper end of the mounting leg 60 toward the water storage area side.

[0036] The upper wall portion 50 of the hinge body 11 is sandwiched between the hinge mounting plate 12 from the waterstop body 10A and the upper fixing plate 55, and is fixed by an upper fixing bolt 63. Meanwhile, the lower wall portion 51 of the hinge body 11 is sandwiched between the mounting surface portion 61 (support portion) of the mounting base 58 and the lower fixing plate 56, and is fixed by a lower fixing bolt 64. Then, referring to Figures 4 and 5, when water enters the pit 16 due to a rise in the water level in the water storage area, buoyancy acts on the waterstop 10 (each waterstop body 10A, 10A), and the waterstop 10 rotates clockwise around the hinge body 11, and can rise up from within the pit 16. At this time, the upper wall portion 50 of the hinge body 11 is bent away from the lower wall portion 51, and is elastically deformed. In addition, as the waterstop 10 stands up, the upper link 42 and the lower links 44, 44 of each support leg 40 extend, maintaining the waterstop 10 in an upright position.

[0037] In this way, the upper wall portion 50 and the lower wall portion 51 of the hinge body 11 are fixed portions, and the vertical wall portion 52 is a non-fixed portion, thereby ensuring the degree of freedom of rotation of the hinge body 11, and the upward displacement of the waterstop 10 during the raising operation is restrained by the vertical wall portion 52 of the hinge body 11, resulting in a structure that supports the upward load due to buoyancy acting on the waterstop 10. On the other hand, when the waterstop 10 falls down and is stored in the pit 16, a load from the floorboard 22 (floor surface of the passage 5) also acts on the hinge body 11. Therefore, the portion where the hinge body 11 is arranged is between the floorboard hinge mounting portion 28 of the floorboard 22 and the mounting surface portion 61 of the mounting base 58, with the hinge mounting plate 12, hinge body 11, upper fixing plate member 55, and lower fixing plate member 56 closely contacting each other along the vertical direction. These are supported by the mounting base 58 in a state of close contact with each other in the vertical direction, so the load transmitted from the floor plate 22 to the hinge body 11 is reliably transmitted to the pit 16 via the mounting base 58. In this way, when the waterstop 10 is in a collapsed state, the waterstop 10 has a highly durable structure that does not rattle.

[0038] 3, the end face of hinge mounting plate 12, the surface of vertical wall portion 52 of hinge body 11 facing the flood-prevented area, and the surface of mounting leg 60 of mounting base 58 facing the flood-prevented area are positioned on approximately the same plane in the vertical direction. Within pit 16, hinge support means 13 is disposed in the space on the flood-prevented area side of vertical wall portion 52 of hinge body 11. This space also functions as drain groove 75 (described below) within pit 16. In this way, by forming hinge body 11 into a U-shape in vertical cross section, it is possible to appropriately provide space on the flood-prevented area side of hinge body 11 within pit 16, and hinge support means 13 can be compactly disposed in this space.

[0039] The hinge support means 13 restricts the movement of the hinge body 11 including the hinge mounting plate 12 in the water pressure direction when the waterstop 10 changes from a collapsed state to an upright state, and restricts the movement of the hinge body 11 including the hinge mounting plate 12 in the water pressure direction and the vertical direction when the waterstop 10 is in an upright state. More specifically, the hinge support means 13 includes a rod-shaped support member 66 that extends integrally from the end face of the hinge mounting plate 12 and extends along the span direction (longitudinal direction) of the waterstop 10, moving substantially vertically as the waterstop 10 rises and falls, and a plurality of plate-shaped support members 67 that are installed at intervals along the span direction (longitudinal direction) of the waterstop 10 and that receive the rod-shaped support member 66 and have notched grooves 69 that define the range of movement of the rod-shaped support member 66. The rod-shaped support members 66 correspond to the support parts.

[0040] The rod-shaped support member 66 is formed to have a circular cross section. The rod-shaped support member 66 extends over the entire span (longitudinal) area of ​​each waterstop body 10A. The rod-shaped support member 66 is formed to have a diameter larger than the thickness of the hinge mounting plate 12. The rod-shaped support member 66 is fixed by having its outer peripheral surface abut against the end surface of the hinge mounting plate 12. When the waterstop 10 is in a laid-down state, the rod-shaped support member 66 is positioned so that its upper end (outer peripheral surface) coincides with the upper surface of the floor panel hinge mounting portion 28 of the floor panel 22. The rod-shaped support member 66 moves substantially in the vertical direction due to the rotation of the hinge mounting plate 12 as the waterstop 10 is raised or lowered. In this embodiment, the outer peripheral surface of the rod-shaped support member 66 is fixed to the end face of the hinge mounting plate 12. However, instead of the rod-shaped support member 66, the end face of the hinge mounting plate 12 may be formed into an arcuate surface that conforms to the outer peripheral surface of the rod-shaped support member 66, with the arcuate surface functioning as a support. In this embodiment, the outer peripheral surface of the rod-shaped support member 66 is fixed to the end face of the hinge mounting plate 12. However, the rod-shaped support member 66 may be elastically supported so that the rod-shaped support member 66 can move substantially vertically while constantly abutting against the end face of the hinge mounting plate 12 as the waterstop 10 collapses. The plate-shaped support member 67 is erected in a space closer to the water-proof area than the vertical wall portion 52 of the hinge body 11. A plurality of plate-shaped support members 67 are erected at intervals along the span (longitudinal) direction of each waterstop main body 10A. The end face of the plate-shaped support member 67 on the water storage area side is abutted against the vertical wall portion 52 of the hinge body 11 and the mounting leg 60 of the mounting base 58 .

[0041] The plate-shaped support member 67 has a notched groove 69 that is substantially L-shaped in side view at a position facing the end face of the hinge mounting plate 12. The horizontal length of the notched groove 69 is substantially the same as the outer diameter of the rod-shaped support member 66. As the waterstop 10 rises and falls, the rod-shaped support member 66 moves substantially vertically within the notched groove 69. The height of the notched groove 69 is set so that the outer peripheral surface of the rod-shaped support member 66 reaches the bottom of the notched groove 69 when the waterstop 10 is fully erected. A fan-shaped drain notched groove 71 is formed at the lower part of the plate-shaped support member 67, on the side facing the flood prevention area. An L-shaped cover member 73 (L-shaped angle bar) is arranged at the upper end of each plate-shaped support member 67 to cover the gap between the plate-shaped support members 67 from above. The gap between the rod-shaped support member 66 lined up at the end of the floor panel hinge mounting portion 28 of the floor panel 22 and the cover member 73 is extremely small and negligible. The upper surface of the floor panel hinge mounting portion 28 of the floor panel 22, the upper end surface (outer peripheral surface) of the rod-shaped support member 66, and the upper surface of the cover member 73 are located on approximately the same plane along the horizontal direction, with no steps or the like.

[0042] 2 and 3, when the waterstop 10 is stored in the pit 16 in a laid-down state, the upper ends of the rod-shaped support members 66 fixed to the end faces of the hinge mounting plates 12 are positioned at positions that coincide with the upper surfaces of the floor panel hinge mounting portions 28 and at the upper ends of the notched groove portions 69 of each plate-shaped support member 67. As a result, the movement of the waterstop 10, including the hinge bodies 11 (hinge mounting plates 12), in the front-to-rear direction within the pit 16 is restricted. Also, referring to FIGS. 3 and 5, in the process of the waterstop 10 changing from the laid-down state to the upright state, when the waterstop 10 starts to stand up by rotating around the hinge bodies 11, the floor panel 22 and the hinge mounting plates 12 move so as to tilt from the horizontal state, and the rod-shaped support members 66 fixed to the end faces of the hinge mounting plates 12 move downward within the notched groove portions 69 of the plate-shaped support members 67 while contacting the vertical wall portions 52 of the hinge bodies 11. As a result, in the process of waterstop 10 changing from a lying down state to an upright state, movement of hinge body 11 including hinge mounting plate 12 in the water pressure direction (substantially horizontal direction or front-rear direction) is restricted.

[0043] 4 and 5, when the waterstop 10 reaches its maximum upright position, the rod-shaped support members 66 contact the bottom surfaces of the notched grooves 69 of the plate-shaped support members 67 and also contact the vertical wall portions 52 of the hinge body 11. As a result, when the waterstop 10 reaches its maximum upright position, movement of the hinge body 11, including the hinge mounting plate 12, in the water pressure direction (substantially horizontal or front-to-rear direction) and in the vertical direction is restricted. In this way, the hinge support means 13 can reliably maintain the position of the hinge body 11, including the hinge mounting plate 12, without movement (displacement) in an unintended direction during the process of the waterstop 10 moving from its collapsed state to its upright state, and during the upright state of the waterstop 10. Furthermore, the hinge support means 13 can reliably transmit the load on the hinge body 11, including the hinge mounting plate 12, to the pit 16. Moreover, since the multiple plate-like support members 67 are arranged in contact with the mounting legs 60 of the mounting base 58 as well as the hinge body 11, the plate-like support members 67 can also suppress deformation of the mounting legs 60 of the mounting base 58 in the direction of water pressure when the waterstop 10 changes from a collapsed state to an upright state, and when the waterstop 10 is in the upright state. As a result, as described above, it is possible to reliably restrict movement of the hinge body 11 including the hinge mounting plate 12 in the direction of water pressure and in the vertical direction.

[0044] Furthermore, when the water level in the water storage area drops and the water level in the pit 16 drops accordingly, the buoyancy on the waterstop 10 gradually decreases. Then, in FIG. 4 , the waterstop 10 rotates counterclockwise around the hinge body 11, and the upper link 42 and the lower links 44, 44 of each support leg 40 are folded, so that the waterstop 10 is stored in a laid-down state in the pit 16. At this time, the hinge body 11 restores its upper wall portion 50 to its initial position (the laid-down state of the waterstop 10), and the rod-shaped support members 66 move upward within the notched grooves 69 of each plate-shaped support member 67 to return to their initial positions (the state shown in FIGS. 2 and 3 ). As a result, as described above, the floor plate 22 of the waterstop 10 functions as the floor surface of the passageway 5 as usual, and this state is maintained.

[0045] As described above with reference to Figures 3, 5, and 8, the space within the pit 16 in which the hinge support means 13 is disposed functions as a drain groove 75. That is, the drain groove 75 functions as a drain within the pit 16 from the mounting legs 60 of the mounting base 58 to the flood-prevented area side. As described above, each plate-like support member 67 of the hinge support means 13 is formed with a drain notch groove 71 so as not to impede the flow of water. The drain groove 75 within the pit 16 is intended to handle rainwater on the flood-prevented area side and to handle drainage such as small amounts of water leaking from the waterstop 10. Furthermore, the drain groove 75 is designed to provide sufficient space for even the smallest debris that may enter through the gap between the rod-like support member 66 and the cover member 73, so that the debris will be discharged along the drain groove 75 without clogging the drain groove 75.

[0046] Referring to FIG. 8 , a drain pit 76 is provided on the floor surface of the waterstop 10 on the flood-prevention area side to collect water from a drain groove 75 in the pit 16 via a drain pipe 77 and facilitate drainage. Meanwhile, a drain pipe 78 is provided in the pit 16 to connect the area on the water retention area side of the mounting legs 60 of the mounting base 58 with the water retention area. The drain pipe 78 extends from near the bottom 18 of the pit 16 toward the water retention area. The drain pipe 78 may be inclined downward toward the water retention area. If the water level in the water retention area drops after flooding in the pit 16, the drain pipe 78 promotes drainage from the pit 16 toward the water retention area. This allows the water level in the water retention area to accurately reflect the water level in the pit 16, and the waterstop 10 can be collapsed into the pit 16 appropriately and without delay as the water level in the water retention area drops.

[0047] As described above, the waterstop device 1 according to this embodiment employs a flexible, elastically deformable hinge body 11, which is made of a rubber material reinforced with reinforcing fibers, so that the rotational resistance of the waterstop 10 is low and malfunctions caused by unintended large deformation of the hinge body 11 due to the load, water pressure, etc. from the passage 5 can be suppressed. In other words, because a rubber material reinforced with reinforcing fibers is used for the hinge body 11, it has the bending and watertight functions of the hinge body 11 and can transmit the load, water pressure, etc. from the passage 5 to the pit 16 mainly via the reinforcing fibers, so that unintended large deformation of the hinge body 11 can be suppressed.

[0048] Furthermore, in the waterstop device 1 according to this embodiment, the waterstop 10 employs a corrugated structure, which provides sufficient strength to function as part of the passageway 5 when collapsed, and the waterstop 10 is lightweight due to the use of a plurality of low-specific-gravity foam materials 25, which allows the waterstop 10 to automatically stand upright by buoyancy when water floods the pit 16. Furthermore, the hinge body 11 is attached to the underside of the hinge mounting plate 12 of the waterstop 10, so that when it functions as the passageway 5 when collapsed, the upper surface of the waterstop 10, which serves as the floor of the passageway 5, is smooth and has no irregularities such as grooves that would obstruct passage, which is preferable.

[0049] Furthermore, since the water stop device 1 of this embodiment is equipped with a hinge support means 13, movement of the hinge body 11 including the hinge mounting plate 12 in the water pressure direction (approximately horizontal and front-to-back directions) is restricted during the process of the water stop plate 10 changing from a collapsed state to an upright state, and when the water stop plate 10 is in its maximum upright state, movement of the hinge body 11 including the hinge mounting plate 12 in the water pressure direction and vertical direction is restricted.

[0050] As a result, the load in the direction of water pressure transmitted to the hinge body 11 including the hinge mounting plate 12, and in the direction of water pressure (substantially horizontal) and vertically downward when in the upright state, is safely transmitted to the pit 16 via contact between the hinge mounting plate 12 of the waterstop 10 and the hinge support means 13. In other words, during the process of the waterstop 10 changing from a collapsed state to an upright state, and when the waterstop 10 is in its maximum upright state, the hinge body 11 including the hinge mounting plate 12, and therefore the waterstop 10, are reliably maintained in their positions without moving in unintended directions, improving the positional accuracy of the waterstop 10 in both the upright and collapsed states and improving the reliability of the opening and closing operations.

[0051] That is, when the waterstop 10 is in an upright state, a large vertically downward force (compressive force) acts on the hinge body 11. For this reason, if the waterstop 10 were supported solely by the hinge body 11, the waterstop 10 would be displaced downward and would not be able to maintain its position properly, but the waterstop device 1 according to this embodiment is provided with the hinge support means 13, which restricts the downward movement of the hinge body 11 and therefore the waterstop 10, particularly when the waterstop 10 is in an upright state. This ensures that the positions of the hinge body 11 and therefore the waterstop 10 are maintained without moving in an unintended direction, improving the positional accuracy of the waterstop 10 in an upright state in particular.

[0052] Furthermore, the hinge support means 13 adopted in the water stop device 1 of this embodiment is fixed to the end face of the hinge mounting plate 12 (extending integrally from the end face) and comprises a rod-shaped support member 66 (support portion) extending along the span direction (longitudinal direction) of the water stop plate 10, which moves approximately in an up-and-down direction as the water stop plate 10 rises and falls, and a plate-shaped support member 67 which accommodates the rod-shaped support member 66 and has a notched groove portion 69 which defines the range of movement of the rod-shaped support member 66, and which is arranged in a plurality of upright positions at intervals along the span direction (longitudinal direction) of the water stop plate 10.

[0053] As a result, when the waterstop 10 changes from a laid-down state to an upright state, the rod-shaped support members 66 fixed to the end faces of the hinge mounting plates 12 move downward along the notched grooves 69 of each of the plate-shaped support members 67, thereby restricting movement of the hinge body 11 including the hinge mounting plates 12 in the water pressure direction. Also, when the waterstop 10 is in the upright state, the rod-shaped support members 66 fixed to the end faces of the hinge mounting plates 12 come into contact with the bottom surfaces of the notched grooves 69 of each of the plate-shaped support members 67, thereby restricting movement of the hinge body 11 including the hinge mounting plates 12 in the vertical direction as well as movement in the water pressure direction.

[0054] Furthermore, the hinge body 11 employed in the waterstop device 1 according to this embodiment is formed in a U-shape in vertical cross section when the waterstop plate 10 is in a laid-down state. The hinge body 11 is also arranged below the hinge mounting plate 12 so that its open side faces the water storage area. As a result, problems such as malfunction of the hinge body 11 caused by foreign matter such as sand or dust in the passageway 5, as seen in the prior art (particularly the lower waterstop rubber plate described in Patent Document 2), can be resolved. Furthermore, because the hinge body 11, which is formed in a U-shape in vertical cross section, is arranged below the hinge mounting plate 12, an effective space can be provided on the water-prevention area side of the hinge body 11 within the pit 16, and the hinge support means 13 can be arranged compactly in this space.

[0055] Furthermore, in the water stop device 1 according to this embodiment, the upper wall portion 50 of the hinge body 11 is bolted to the hinge mounting plate 12 of the floor board 22, and the lower wall portion 51 is bolted to and supported by the mounting surface portion 61 (support portion) of the mounting base 58 in the pit 16, so that the vertical wall portion 52 of the hinge body 11 resists the upward displacement of the water stop 10 during the process of reaching the upright state. In other words, due to the shape and fixing state of the hinge body 11, even if buoyancy acts on the water stop 10 and a force pulling the hinge body 11 upward acts on the water stop 10 during the upright movement, the water stop 10 including the hinge body 11 is maintained in its position without moving in an unintended direction, so that the hinge mounting plate 12, and therefore the water stop 10, can be prevented from unstable behavior of floating upward.

[0056] Furthermore, in the water stop device 1 according to this embodiment, the upper wall portion 50 of the hinge body 11 is formed so that its thickness gradually increases toward the open side. The upper wall portion 50 is fixed to the hinge mounting plate 12 by being sandwiched between the hinge mounting plate 12 and the upper fixing plate member 55. On the other hand, the lower wall portion 51 of the hinge body 11 is formed so that its thickness gradually increases toward the open side. The lower wall portion 51 is fixed to the mounting surface portion 61 of the mounting base 58 by being sandwiched between the mounting surface portion 61 and the lower fixing plate member 56. As a result, the hinge body 11 can resist a load acting in a direction that causes it to be pulled out by water pressure during processes up to and including the standing state of the water stop plate 10. As a result, when the water stop device 1 is operating, the hinge body 11, and therefore the water stop plate 10, are reliably maintained in their positions without moving in an unintended direction, further improving the positional accuracy of the water stop plate 10 in both the upright and laid-down states, and further improving the reliability of the opening and closing operations.

[0057] The water stop device 1 of this embodiment can achieve the unique effects described above, and as a result, when there is no need to stop water from entering, it can function sufficiently as the floor surface of the passageway 5 through which people, vehicles, etc. enter and exit, and in the event of sudden water inundation due to a disaster or the like, the water stop plate 10 will reliably rise up due to buoyancy to stop the water, providing high reliability. [Explanation of symbols]

[0058] 1 water stop device, 10 water stop plate, 11 hinge body, 12 hinge mounting plate, 13 hinge support means, 50 upper wall portion (one end portion), 51 lower wall portion, 58 mounting base, 61 mounting surface portion (support portion), 66 rod-shaped support member (support portion), 67 plate-shaped support member, 69 notch groove portion

Claims

1. A waterstop device that stops water from entering a flood-prevented area by having a waterstop plate stand up due to the buoyancy of the water. a hinge body extending along the span direction of the waterstop to support the waterstop so as to be able to rise and fall freely, and capable of elastic deformation; a hinge mounting plate that extends integrally from the waterstop plate and has an upper wall portion of the hinge body fixed to its lower surface; a hinge support means for restricting movement of the hinge body including the hinge mounting plate in the water pressure direction during the process of the waterstop changing from a collapsed state to an upright state, and for restricting movement of the hinge body including the hinge mounting plate in the water pressure direction and in the vertical direction during the upright state of the waterstop; The hinge body is formed in a U-shape in a vertical cross section along a direction perpendicular to the span direction of the waterstop, with its open side facing the water storage area when the waterstop is in a laid-down state, A waterproof device, wherein the upper wall portion of the hinge body is fixed to the hinge mounting plate, and the lower wall portion of the hinge body is fixed to a support portion.

2. The hinge support means is a support portion extending integrally from an end surface of the hinge mounting plate and extending along the span direction of the waterstop plate, the support portion moving substantially in the vertical direction in accordance with the raising and lowering movement of the waterstop plate; a plurality of plate-like support members provided at intervals along the span direction of the waterstop, the plate-like support members having notched grooves that accommodate the support portions and define the range of movement of the support portions; The waterproof device according to claim 1, further comprising:

3. The hinge body is made of a rubber material reinforced with reinforcing fibers, the upper wall portion of the hinge body is fixed to the hinge mounting plate so as to be sandwiched from above and below, and the lower wall portion of the hinge body is fixed to the support portion so as to be sandwiched from above and below, 2. The waterproof device according to claim 1, wherein the opposing upper and lower wall portions are formed so that the thicknesses of the upper and lower wall portions gradually increase toward the open side.

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