Water stop device, and installation method of water stop device

Abstract

To provide a water stop device capable of preventing gaps from occurring in the width direction between upper and lower watertight materials.SOLUTION: A water stop device includes: a lower water stop 10 installed to block water flow; an upper water stop 20 stacked on top of the lower water stop 10; and a support 51 that supports the upper and lower water stops from the downstream side at one end in the width direction. The lower water stop 10 includes a vertical watertight material 13b that is pressed against support 51 in the vertical direction. The upper water stop 20 includes a vertical watertight material 23b that is pressed against the support 51 in the vertical direction at a position different from the lower waterproof plate 10 in the width direction. Between the lower water stop 10 or the upper water stop 20 and the support 51, a coupling watertight material 40 is provided that is sandwiched therebetween and comes into contact with both the vertical watertight material 13b and the vertical watertight material 23b.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a water stop device that closes the openings of buildings and subways with a water stop plate during a flood to prevent water intrusion, and a method for installing this water stop device.

Background Art

[0002] When floodwaters due to typhoons or heavy rainstorms invade the openings of buildings and subways, there is a risk of significant damage caused by flooding. Therefore, in preparation for such a situation, columns are erected opposite each other on both sides of the openings of buildings and subways in advance, and a plate-shaped water stop plate is stored near these columns. When a flood occurs, the water stop plate is attached to the columns to close the opening and prevent water intrusion (see Patent Document 1). By the way, according to such a conventional technique, when a flood with a water level higher than the height of the water stop plate is expected, there is a risk that the flood will overflow over the water stop plate. Therefore, it is conceivable to connect a newly installed water stop plate vertically to an existing water stop plate so as to be able to cope with a flood with a higher water level.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, for example, due to differences in production time, product series, etc., the lateral dimensions of an existing water stop plate and a new water stop plate connected thereto are different. Accordingly, the positions of the waterproof materials in the upper and lower water stop plates may also be different in the lateral direction. And in such a case, a lateral gap may occur between these upper and lower waterproof materials, and there is a risk that water will leak through this gap.

Means for Solving the Problem

[0005] In view of such problems, one aspect of the present invention has the following configuration. A water stop device comprising a lower water stop plate provided to block the water flow, an upper water stop plate stacked above the lower water stop plate, and a support column that receives the upper and lower water stop plates from the downstream side at one end in the lateral width direction, wherein the lower water stop plate comprises a vertical watertight material that is pressed against the support column in the vertical direction, the upper water stop plate comprises a vertical watertight material that is pressed against the support column in the vertical direction at a position different from that of the vertical watertight material of the lower water stop plate in the lateral width direction, and a connecting watertight material that is sandwiched between the lower water stop plate or the upper water stop plate and the support column and is in contact with both the vertical watertight material of the lower water stop plate and the vertical watertight material of the upper water stop plate is provided between them.

Effect of the Invention

[0006] Since the present invention is configured as described above, it is possible to prevent a gap in the lateral width direction from occurring between the upper and lower watertight materials of the upper water stop plate and the lower water stop plate.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

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Figure 8

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Figure 10

Figure 11

Embodiments for Carrying out the Invention

[0008] Next, embodiments according to the present invention will be described in detail with reference to the drawings. In the following description, "inside in the lateral direction" means the direction toward the inside along the lateral direction of the lower water stop plate 10 and the upper water stop plate 20. Also, "outside in the lateral direction" means the direction toward the outside along the lateral direction of the lower water stop plate 10 and the upper water stop plate 20. Therefore, for example, inside in the lateral direction compared to the right vertical watertight portion 13b1 means the left side compared to the right vertical watertight portion 13b1.

[0009] The water stop device 1 includes a lower water stop plate 10, an upper water stop plate 20 stacked above the lower water stop plate 10, left and right support columns 51, 51 that receive these upper and lower water stop plates from the downstream side at one end side and the other end side in the lateral direction, a locked portion 31 and a locking portion 32 that suppress the upper water stop plate 20 from bending downstream relative to the lower water stop plate 10, and a connecting watertight member 40 (see FIG. 8) that maintains the watertightness of the lower water stop plate 10 and the upper water stop plate 20 with respect to each support column 51 in the vertical direction, and is attached to the housing X so as to block the water flow in the direction intersecting the lower water stop plate 10 and the upper water stop plate 20.

[0010] This water stop device 1 replaces the left and right support columns 151, 151 of the existing water stop device 100 (see FIG. 10) with support columns 51, 51 having an extended length shape, and uses the existing water stop plate 120 as the upper water stop plate 20 so that the water stop height becomes higher. Note that the means for fixing the water stop plate 120 to the left and right columns 131, 131 is by a well-known dedicated locking tool (not shown). o

[0011] The body X is, for example, a structure such as a building or an underpass made of reinforced concrete. This body X has an opening Xa (for example, an opening of an automatic door, an opening of an underpass, or other openings through which people and objects can pass) that communicates with the outside, and a sill surface Xb below this opening Xa. According to an example shown in FIG. 1, assuming the outside of the body X as the upstream side and the inside of the body X as the downstream side, the flow direction of water due to floods or the like during disasters is assumed.

[0012] The lower water stop plate 10 integrally includes a rectangular plate-shaped main body plate 11, a plurality of hanging portions 12 fixed to the surface of the main body plate 11, a lower watertight member 13 provided on the downstream side surface of the main body plate 11, and a hanging portion 14 for hanging the lower water stop plate 10 on the column 51.

[0013] The lower watertight member 13 connects, without gaps, a lateral watertight material 13a that protrudes downward from the lower end of the main body plate 11 and is continuous in the lateral direction, vertical watertight materials 13b that protrude downstream on the left and right end sides of the main body plate 11 and are continuous in the vertical direction, and an auxiliary watertight portion 13d provided at the upper end of the vertical watertight material 13b (see FIG. 4). These watertight materials are formed by appropriately cutting an integral long watertight material made of an elastic material such as rubber or elastomer resin to an appropriate length.

[0014] The lateral watertight material 13a is continuously arranged substantially horizontally over substantially the entire width of the main body plate 11 and is connected to the main body plate 11 by appropriate connecting means (for example, fitting, adhesion, etc.). This lateral watertight material 13a is watertightly pressed against the sill surface Xb of the body X over substantially the entire width in the width direction and elastically deformed.

[0015] Each of the upper and lower watertight members 13b on the left and right is composed of a vertical watertight portion 13b1 that extends continuously in the vertical direction along the main body plate 11 and a connecting watertight portion 13b2 that contacts the lower end of the vertical watertight portion 13b1 and the downstream side surface of the horizontal watertight member 13a.

[0016] The vertical watertight portion 13b1 is continuous in the vertical direction (substantially vertical according to the illustrated example) at each of one end side and the other end side in the lateral width direction on the downstream side surface of the main body plate 11, and is connected to the main body plate 11 by appropriate connecting means (for example, fitting, adhesion, etc.). Each vertical watertight portion 13b1 is watertightly pressed against the support column 51 over substantially the entire length in the vertical direction and elastically deformed.

[0017] The connecting watertight portion 13b2 is formed over the thickness direction of the main body plate 11. One end side thereof is pressed or adhered to the lower end side of the vertical watertight portion 13b1, and the other end side thereof is pressed or adhered to the end side of the horizontal watertight member 13a, and is connected to the main body plate 11 by appropriate connecting means (for example, fitting, adhesion, etc.). This connecting watertight portion 13b2 presses the downstream end portion thereof against the support column 51, and continuously presses against the lapping surface Xb elastically deformed from the position in contact with the vertical watertight portion 13b1 to the position in contact with the horizontal watertight member 13a, continuously connecting the vertical watertight portion 13b1 and the horizontal watertight member 13a so that water leakage does not occur between them.

[0018] The auxiliary watertight portion 13d is formed in a flat plate shape that covers the upper end portions of each vertical watertight portion 13b1 and the upper end portion of the main body plate 11, and is connected to the main body plate 11 by appropriate connecting means (for example, fitting, adhesion, etc.). This auxiliary watertight portion 13d makes the vertical watertight portions 13b1, 13b1 between the upper and lower watertight plates in watertight contact when the watertight plates having the same configuration as the lower water stop plate 10 are continuously provided vertically. In the water stop device 1, it is also possible to omit this auxiliary watertight portion 13d.

[0019] Hooking portions 14 are provided on both side surfaces of the main body plate 11 at the upper end side and the lower end side, respectively (see FIG. 2). Each engaging portion 14 is configured such that a roller is rotatably supported on the tip side of a shaft portion protruding outward in the lateral width direction from the main body plate 11. This engaging portion 14 detachably fits into an engaged portion 52 on the lower end side of the support column 51, pressing the lower water stop plate 10 against the support column 51.

[0020] The upper water stop plate 20 integrally includes a rectangular plate-shaped main body plate 21, a plurality of handle portions 22 fixed to the upper end of the main body plate 21, and an upper watertight member 23 provided on the downstream side surface of the main body plate 21. This upper water stop plate 20 is configured to be more flexible than the lower water stop plate 10 by making the thickness of its main body plate 21 smaller than the thickness of the main body plate 11 of the lower water stop plate 10. Therefore, the upper water stop plate 20 has a lower flexural strength than the lower water stop plate 10 and is more likely to bend in an arcuate shape than the lower water stop plate 10 when receiving water flow.

[0021] Here, as a specific example of the configuration for making the upper water stop plate 20 more flexible than the lower water stop plate 10, the section modulus of the upper water stop plate 20 is made smaller than the section modulus of the lower water stop plate 10. That is, the state and amount of deflection of the upper water stop plate 20 can be represented by the schematic diagram and mathematical formula shown in FIG. 11. In these schematic diagram and mathematical formula, δ is the amount of deflection, W is the load, L is the lateral length (lateral width), E is the longitudinal elastic modulus, and I is the second moment of area. The lower water stop plate 10 can also be represented by similar schematic diagrams and mathematical formulas.

[0022] And in the mathematical formula of FIG. 11, the second moment of area I can be obtained from the following formula. I = Ze Z: Section modulus, e: Distance of the centroid

[0023] In a preferred example of the present invention, the cross-sectional shape, distance of the centroid, etc. of the main body plate 21 and the main body plate 11 are appropriately set so that the second moment of area and section modulus of the upper water stop plate 20 are smaller than the second moment of area and section modulus of the lower water stop plate 10.

[0024] The main body plate 21 is thinner and has a smaller dimension in the lateral width direction than the main body plate 11 of the lower water stop plate 10. An upper watertight member 23, whose overall length in the lateral width direction is smaller than that of the lower watertight member 13, is attached to the downstream side surface of the main body plate 21.

[0025] The upper watertight member 23 connects a lateral watertight material 23a that protrudes downward from the lower end of the main body plate 21 and is continuous in the lateral direction, and vertical watertight materials 23b that protrude downstream on the left and right end sides of the main body plate 21 and are continuous in the vertical direction (see Fig. 4). Similar to the lower watertight member 13, these watertight materials are formed by appropriately cutting an integrally long watertight material made of an elastic material such as rubber or elastomer resin to an appropriate length.

[0026] The lateral watertight material 23a is continuously arranged substantially horizontally over substantially the entire length of the main body plate 21 in the lateral width direction, and is connected to the main body plate 21 by appropriate connecting means (for example, fitting, adhesion, etc.). This lateral watertight material 23a is watertightly pressed against and elastically deformed with respect to the upper end portion of the lower water stop plate 10 over substantially the entire length in the lateral width direction.

[0027] Each of the left and right vertical watertight materials 23b is composed of a vertical watertight portion 23b1 that is continuously long in the vertical direction along the main body plate 21, and a connecting watertight portion 23b2 that is in contact with the downstream side surface of the lateral watertight material 23a at the lower end of the vertical watertight portion 23b1.

[0028] The vertical watertight portion 23b1 is continuous in the vertical direction (substantially vertical according to the illustrated example) at each of one end side and the other end side in the lateral width direction on the downstream side surface of the main body plate 21, and is connected to the main body plate 21 by appropriate connecting means (for example, fitting, adhesion, etc.). Each of the left and right vertical watertight portions 23b1 is watertightly pressed against and elastically deformed with respect to the support column 51 over substantially the entire length in the vertical direction at a position in the lateral width direction different from that of the vertical watertight portion 13b1 of the lower water stop plate 10 (inside in the lateral width direction with respect to the vertical watertight portion 13b1 according to the illustrated example).

[0029] The connecting watertight part 23b2 is formed to extend in the thickness direction of the main body plate 21. One end side thereof is press-connected or adhered to the lower end side of the connecting watertight part 23b2, and the other end side is press-connected or adhered to the end side of the lateral watertight material 23a, so that it is connected to the main body plate 21 by appropriate connecting means (for example, fitting, adhesion, etc.). This connecting watertight part 23b2 press-contacts the downstream end part thereof to the support column 51, and continuously contacts the lower connecting watertight material 40 and elastically deforms from the position contacting the vertical watertight part 23b1 to the position contacting the lateral watertight material 23a (see Fig. 8(b)), continuously connecting the vertical watertight part 23b1 and the lateral watertight material 23a to prevent water leakage therebetween.

[0030] The engaged part 31 and the locking part 32 are provided to lock the upper water stop plate 20 to the lower water stop plate 10 when the upper water stop plate 20 tends to deflect downstream relative to the lower water stop plate 10 (see Fig. 7). These engaged part 31 and locking part 32 are provided at least at the central part in the width direction of the lower water stop plate 10 and the upper water stop plate 20, and according to the illustrated example, they are continuous over substantially the entire length in the width direction of the lower water stop plate 10 and the upper water stop plate 20.

[0031] The engaged part 31 is provided inside the thickness of the main body plate 21 and upstream of the lateral watertight material 23a at the lower end of the upper water stop plate 20. This engaged part 31 has a concave longitudinal cross section with an opening downward and is continuous in the width direction. This engaged part 31 utilizes an existing concave part formed in the existing water stop plate 120 (see Fig. 10) that constitutes the upper water stop plate 20. As another example, an engaged part 31 of a separate member may be newly provided at the lower end of the upper water stop plate 20.

[0032] The locking part 32 is provided to fit into the engaged part 31 at the upper end of the lower water stop plate 10. The locking portion 32 illustrated in FIG. 7 integrally includes an upward convex protruding piece portion 32a that fits into the locked portion 31 within the thickness of the upper water stop plate 20, and a fixing piece portion 32b that fits into and is fixed to the corner portion on the upstream side of the lower water stop plate 10, and has a crank-shaped longitudinal cross-section that is continuous in the lateral width direction. This locking portion 32 is retrofitted to the lower water stop plate 10 before the stacking operation when the upper water stop plate 20 is stacked on the lower water stop plate 10.

[0033] Further, the connecting watertight material 40 is sandwiched between the main body plate 11 of the lower water stop plate 10 and the support column 51 and elastically contracts therebetween (see FIG. 9), and is press-contacted to both the vertical watertight portion 13b1 of the lower watertight member 13 and the connecting watertight portion 23b2 of the upper watertight member 23, and is also press-contacted to the lateral watertight material 23a and the auxiliary watertight portion 13d (see FIG. 8(a)).

[0034] This connecting watertight material 40 is formed in a block shape (cubic shape according to the illustrated example) from an elastic material (such as rubber or elastomeric resin), is supported from below by the receiving member 41, and is integrally connected to the main body plate 11 of the lower water stop plate 10 (see FIG. 3).

[0035] According to the illustrated example, the receiving member 41 is an L-shaped angle member made of a hard material such as a metal material. One piece thereof is fixed to the downstream side surface of the lower water stop plate 10, and the other piece receives the connecting watertight material 40 from below.

[0036] According to the illustrated example, the means for fixing the receiving member 41 to the lower water stop plate 10 is screw fastening, but it is also possible to use rivet fastening, fitting, adhesion, welding, etc.

[0037] As a means for integrally connecting the connecting watertight material 40 to the main body plate 11 or the receiving member 41, for example, adhesion using an adhesive material (including double-sided tape and adhesive) may be used, but it is also possible to use fitting, screw fastening, rivet fastening.

[0038] The support columns 51 are fixed in the vertical direction to the upstream side surface of the housing X on the left and right sides of the opening Xa, respectively. Each support column 51 is a long member with a substantially flat upstream side surface continuous in the vertical direction, and is formed, for example, in a prismatic shape.

[0039] On the lower half side of the upstream side surface of this support column 51, a latching portion 52 is fixedly attached to the outside in the lateral width direction, and the vertical waterproof material 13b of the lower waterproof plate 10, the connecting waterproof material 40, etc. are pressed against the inside in the lateral width direction (see FIG. 9). Also, on the upper half side of the same support column 51, the vertical waterproof material 23b of the upper waterproof plate 20 is pressed against it.

[0040] A plurality of latching portions 52 are provided corresponding to the latching portions 14 of the lower waterproof plate 10. Each latching portion 52 is formed in a substantially concave shape in a side view with an open upstream side, and detachably latches the latching portion 14 inserted from the upstream side. In the figure, reference numeral 52a is a bracket that integrally connects the upper and lower latching portions 52, 52 and is fixed to the support column 51.

[0041] <Regarding the installation method of the waterproof device> Next, regarding the waterproof device 1 having the above configuration, the features in its installation method will be described in detail. When using the existing waterproof plate 120 as the upper waterproof plate 20 and installing a new lower waterproof plate 10 below this upper waterproof plate 20, before this installation work, the locking portion 32 and the connecting waterproof material 40 are attached to the lower waterproof plate 10 (see FIGS. 2 and 3).

[0042] The locking portion 32 is fitted and fixed to the upstream corner portion at the upper end of the main body plate 11 (see FIGS. 2 and 3). Also, the connecting waterproof material 40 is attached to the downstream side surface of the main body plate 11 via the receiving member 41. Note that the work of attaching the locking portion 32 can also be performed after attaching the lower waterproof plate 10 to both support columns 51, 51.

[0043] Next, the lower waterproof plate 10 is attached to the support columns 51 on both sides. In this work, the latching portions 14 on both sides of the lower waterproof plate 10 are respectively fitted into the latching portions 52 on the support column 51 side, and the lower waterproof plate 10 is fixed substantially vertically.

[0044] Next, the upper water stop plate 20 is stacked on the lower water stop plate 10. By this stacking operation, the locked portion 31 is fitted into the locking portion 32 (see FIG. 7), and the connecting watertight material 40 is pressed against the lower vertical watertight material 13b (specifically, the vertical watertight portion 13b1) and the upper vertical watertight material 23b (specifically, the connection watertight portion 23b2) (see FIG. 8).

[0045] Then, the stacked upper water stop plate 20 is locked to the left and right support columns 51, 51 by a well-known dedicated locking tool (not shown).

[0046] <Function and Effect> Therefore, according to the water stop device 1 and its installation method having the above configuration, when the water level rises, if the upper water stop plate 20, which is easily bent, tries to bend in a substantially arcuate cross-section to the downstream side from the lower water stop plate 10, the locked portion 31 on the upper water stop plate 20 side is locked to the locking portion 32 on the lower water stop plate 10 side, and the bending of the upper water stop plate 20 is suppressed. As a result, a gap is prevented from being generated between the upper water stop plate 20 and the lower water stop plate 10, and water leakage from this gap can be prevented.

[0047] Further, in a state where the upper water stop plate 20 is stacked on the lower water stop plate 10, a gap due to a difference in the lateral width position between the upper vertical watertight material 23b and the lower vertical watertight material 13b can be prevented by the connecting watertight material 40 in contact with these two watertight materials.

[0048] <Modification Example> According to the above embodiment, the locked portion 31 and the locking portion 32 are applied to the water stop device 1 in which the upper water stop plate 20 is more easily bent than the lower water stop plate 20 due to the difference in thickness. However, the locked portion 31 and the locking portion 32 can also be applied to a water stop device in which the upper water stop plate is more easily bent than the lower water stop plate due to a configuration other than thickness, such as a water stop device in which the bending strength of the upper water stop plate is smaller than that of the lower water stop plate due to the difference in material.

[0049] According to the above embodiment, the engaged portion 31 is formed in a concave shape and the engaging portion 32 is formed in a convex shape. However, as another example, it is also possible to reverse this concave-convex relationship. That is, the engaged portion 31 may be formed in a convex shape and the engaging portion 32 may be formed in a concave shape.

[0050] According to the above embodiment, the engaged portion 31 is formed in a concave groove shape extending in the lateral width direction, and the engaging portion 32 is formed in a convex plate shape extending in the lateral width direction. However, as another example, the engaged portion 31 may be formed as one or more holes, and the engaging portion 32 may be formed as one or more shafts that respectively fit into the holes. In this case, it is preferable to provide the engaged portion 31 and the engaging portion 32 near the center in the lateral width direction of the lower water stop plate 10 and the upper water stop plate 20.

[0051] According to the above embodiment, as a particularly preferable example, the engaged portion 31 and the engaging portion 32 are configured to engage within the thickness of the upper water stop plate 20. However, as another example, it is also possible to configure the engaged portion 31 and the engaging portion 32 to engage outside the thickness of the upper water stop plate 20.

[0052] According to the above embodiment, as a particularly preferable example, the connecting watertight member 40 is provided on the lower water stop plate 10. However, as another example, it is also possible to provide the connecting watertight member 40 on the upper water stop plate 20, or to provide the connecting watertight member 40 on the support column 51, etc.

[0053] According to the above embodiment, the upper vertical watertight member 23b is arranged inside the lower vertical watertight member 13b in the lateral width direction. However, as another example, it is also possible to arrange the upper vertical watertight member 23b outside the lower vertical watertight member 13b in the lateral width direction, and configure the connecting watertight member 40 to contact these vertical watertight members 13b, 23b.

[0054] Also, according to the above embodiment, the support columns 51, 51 are provided at both end sides of the lower water stop plate 10 and the upper water stop plate 20. However, as another example, it is also possible to provide the support column 51 only at one end side of the lower water stop plate 10 and the upper water stop plate 20, and support the other end side watertightly by a configuration not shown.

[0055] Further, the present invention is not limited to the above-described specific configuration and can be appropriately modified without changing the gist of the present invention.

[0056] <Summary> As described above, the following inventions are disclosed in the above embodiments. (1) A water stop device comprising a lower water stop plate provided so as to obstruct the water flow, an upper water stop plate stacked above the lower water stop plate, and a support column that receives the upper and lower water stop plates from the downstream side at one end side in the lateral width direction, wherein the lower water stop plate includes a vertical waterproof material that is pressed against the support column in the vertical direction, the upper water stop plate includes a vertical waterproof material that is pressed against the support column in the vertical direction at a position different from that of the vertical waterproof material of the lower water stop plate in the lateral width direction, and a connecting waterproof material that is sandwiched between the lower water stop plate or the upper water stop plate and the support column and is in contact with both the vertical waterproof material of the lower water stop plate and the vertical waterproof material of the upper water stop plate is provided (see FIGS. 1 to 9). (2) The vertical waterproof material of the upper water stop plate is located inside the vertical waterproof material of the lower water stop plate in the lateral width direction, and the water stop device according to (1) (see FIGS. 1, 4, 8, etc.). (3) The upper water stop plate includes a lateral waterproof material that contacts the lower water stop plate in the lateral direction, the vertical waterproof material of the upper waterproof plate is composed of a vertical waterproof part that is continuous in the vertical direction and a connecting waterproof part that contacts the vertical waterproof part and the lateral waterproof material, and the connecting waterproof material contacts the connecting waterproof part in the vertical waterproof material of the upper water stop plate. The water stop device according to (1) or (2) (see FIG. 8). (4) The connecting waterproof material is provided on the lower water stop plate, and the water stop device according to any one of (1) to (3) (see FIGS. 2 to 4, 8, 9, etc.). (5) The lower water stop plate is provided with a receiving member that receives the continuous waterproof material from below, and the water stop device according to (4) (see FIGS. 2 to 4, 8, 9, etc.). (6) A step of providing the continuous watertight material so as to be located between the lower watertight plate or the upper watertight plate and the support column, and after this step, a step of stacking the upper watertight plate above the lower watertight plate, which is characterized by being included in the installation method of the watertight device according to any one of (1) to (5) (see FIGS. 3, 8, etc.).

Explanation of reference numerals

[0057] 1: Watertight device 10: Lower watertight plate 11: Body plate 13: Lower watertight member 13a: Lateral watertight material 13b: Vertical watertight material 13b1: Vertical watertight part 13b2: Connection watertight part 20: Upper watertight plate 21: Body plate 23: Upper watertight member 23a: Lateral watertight material 23b: Vertical watertight material 23b1: Vertical watertight part 23b2: Connection watertight part 31: Locked part 40: Connection watertight material 41; Receiving member 51: Support column

Claims

1. A water stop device comprising a lower water stop plate provided to block the flow of water, an upper water stop plate stacked above the lower water stop plate, and a support column that receives the upper and lower water stop plates from the downstream side at one end in the lateral width direction, wherein the lower water stop plate includes a vertical waterproof material that is pressure - contacted with the support column in the vertical direction, the upper water stop plate includes a vertical waterproof material that is pressure - contacted with the support column in the vertical direction at a position different from that of the vertical waterproof material of the lower water stop plate in the lateral width direction, a connecting waterproof material is provided between the lower water stop plate or the upper water stop plate and the support column, which is sandwiched therebetween and contacts both the vertical waterproof material of the lower water stop plate and the vertical waterproof material of the upper water stop plate. The water stop device is characterized by this.

2. The water stop device according to claim 1, wherein the vertical waterproof material of the upper water stop plate is located inside in the lateral width direction with respect to the vertical waterproof material of the lower water stop plate.

3. The upper water stop plate includes a lateral waterproof material that contacts the lower water stop plate across the lateral direction, the vertical waterproof material of the upper waterproof plate is composed of a vertical waterproof part that is continuous in the vertical direction and a connecting waterproof part that contacts the vertical waterproof part and the lateral waterproof material, the connecting waterproof material contacts the connecting waterproof part in the vertical waterproof material of the upper water stop plate. The water stop device according to claim 1 is characterized by this.

4. The water stop device according to claim 1, wherein the connecting waterproof material is provided on the lower water stop plate.

5. The water stop device according to claim 4, wherein a receiving member for receiving the connecting waterproof material from below is provided on the lower water stop plate.

6. A step of providing the connecting waterproof material so as to be located between the lower water stop plate or the upper water stop plate and the support column, and after this step, a step of stacking the upper water stop plate above the lower water stop plate. The method for installing the water stop device according to any one of claims 1 to 5 is characterized by including these steps.

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