Water shutoff device

Abstract

To enable a water sealing plate installation work to be easily performed.SOLUTION: A water sealing device is constituted so that an opening A between right and left water sealing plate support parts 20 is blocked by a water sealing plate 10. A lower engaged part 31 and an upper engaged part 32 separated away in a vertical direction are disposed on surfaces on the opening A side of right and left water sealing plate support parts 20. The water sealing plate 10 has a lower engaging part 14 to be engaged from one side in a water sealing plate thickness direction with the lower engaged part 31 and an upper engaging part 15 to be engaged from the one side with the upper engaged part 32. The lower engaged part 31 is positioned so as to be displaced to the one side with respect to the upper engaged part 32.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a water stop device that closes the openings of buildings and subways during water level rise to prevent water intrusion.

Background Art

[0002] When water level rises due to typhoons, heavy rainstorms, etc. and intrudes into the openings of buildings and subways, there is a risk of causing great damage due to flooding. Therefore, in preparation for such a situation, grooved columns are erected opposite each other on both sides of the openings of buildings and subways in advance, and a water stop plate is stored near these columns. When water level rise occurs, the water stop plate is inserted into the grooves of the columns to close the openings and prevent water intrusion. This has been conventionally known (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above - mentioned conventional technology, in order to fit the water stop plate into the grooves of the columns on both sides, it is necessary to lift the heavy water stop plate to a position higher than the groove and insert it into the groove, and there may be difficulties in this operation.

Means for Solving the Problems

[0005] In view of such problems, the present invention has the following configuration. In a water-stopping device in which an opening between left and right water-stopping plate support parts is closed by a water-stopping plate, the left and right water-stopping plate support parts are provided with a lower engaging part and an upper engaging part spaced apart in the vertical direction on the surface facing the opening, and the water-stopping plate has a lower engaging part on each of its left and right ends that engages with the lower engaging part from one side in the thickness direction of the water-stopping plate, and an upper engaging part that engages with the upper engaging part from the one side, The upper engaged portion and the lower engaged portion are each formed in an axial shape that protrudes toward the opening from each of the left and right water-stopping plate support portions, The water-stopping device is characterized in that the lower engaged portion is positioned offset to one side relative to the upper engaged portion. Furthermore, the present invention comprises the following configurations. An installation jig for a water-stopping plate engagement portion used in the manufacture of a water-stopping device that closes an opening between left and right water-stopping plate support portions with a water-stopping plate, wherein the left and right water-stopping plate support portions are provided with a lower engagement portion and an upper engagement portion spaced apart in the vertical direction on the surface facing the opening, the water-stopping plate has a lower engagement portion on the left end and a lower engagement portion on the right end that engages with the lower engagement portion from one side in the thickness direction of the water-stopping plate, and an upper engagement portion that engages with the upper engagement portion from the same side, the lower engagement portion is positioned offset to one side from the upper engagement portion and integrally has a first fitting portion for fitting and positioning the lower engagement portion and a second fitting portion for fitting and positioning the upper engagement portion, spaced apart in the vertical direction, the first fitting portion is positioned offset to one side from the second fitting portion, and the installation jig for a water-stopping plate engagement portion is characterized in that [Effects of the Invention]

[0006] As described above, the present invention is configured in such a way that it can facilitate the installation of water-stopping plates. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view showing an example of a water-stopping device according to the present invention. [Figure 2] This is a perspective view of the water-stopping device, showing multiple water-stopping plates separated from the left and right water-stopping plate support sections. [Figure 3] This is a perspective view of the main parts showing the separated state of the water-stopping plate and the water-stopping plate support. [Figure 4] This is an enlarged view of the main part showing the opening side of the water-stopping plate support section. [Figure 5] This is an exploded perspective view of key parts showing the relationship between the water stop plate support, the upper and lower engaging parts, the water stop plate engaging part, and the installation jig for the water stop plate engaging part. [Figure 6] This is a plan view of the water-stopping plate engagement portion. [Figure 7] (a) to (c) are front views of the main parts showing the procedure for installing the lower engaging portion and the upper engaging portion in order. [Figure 8] (a) to (c) are front views of the main parts showing the procedure for installing the lower engaging portion of the upper water stop plate in order. [Figure 9]This is a vertical cross-sectional view along the line (IX)-(IX) in Figure 1, showing the state in which the water-stopping plate is being attached to the water-stopping plate support. Note that the cross-sectional hatching for the plate itself has been omitted. [Figure 10] This is a longitudinal cross-sectional view along the line (IX)-(IX) in Figure 1, showing the water-stopping plate attached to the water-stopping plate support. Note that the cross-sectional hatching for the plate itself has been omitted. [Modes for carrying out the invention]

[0008] This embodiment discloses the following features: The first feature is a water-stopping device in which an opening between left and right water-stopping plate support parts is closed by a water-stopping plate, wherein the left and right water-stopping plate support parts are provided with a lower engaging part and an upper engaging part spaced apart in the vertical direction on the surface facing the opening, and the water-stopping plate has a lower engaging part on each of its left and right ends that engages with the lower engaging part from one side in the thickness direction of the water-stopping plate, and an upper engaging part that engages with the upper engaging part from the same side, and the lower engaging part is positioned offset to one side relative to the upper engaging part (see Figures 1 to 4, 9, 10, etc.).

[0009] A second characteristic is that the lower engaging portion engages with the lower engaged portion from an oblique upward direction (see Figure 9).

[0010] A third feature is that the upper engaging portion engages with the upper engaged portion in an irremovable manner, and constitutes an engagement / disengagement mechanism that releases this engagement state through a predetermined operation (see Figure 10).

[0011] A fourth feature is that the lower engaged portion and the upper engaged portion each protrude toward the opening from the respective left and right water-stopping plate support portions, and the water-stopping plate is watertightly pressed against the left and right water-stopping plate support portions from one side in the thickness direction of the water-stopping plate, and the protruding lower engaged portion and the upper engaged portion engage with the lower engaged portion and the upper engaged portion, respectively (see Figures 9 and 10).

[0012] As a fifth feature, there is an installation jig for the waterstop plate engaging portion used in manufacturing the waterstop device, which integrally has a first fitting portion for fitting and positioning the lower engaging portion and a second fitting portion for fitting and positioning the upper engaging portion with a predetermined interval in the vertical direction, and the first fitting portion is displaced to the one side with respect to the second fitting portion (see FIGS. 5 and 6).

[0013] <Specific Embodiment> Next, a specific embodiment having the above features will be described in detail based on the drawings. FIGS. 1 to 2 show an example of the waterstop device according to the present invention. The waterstop device 1 includes a plurality of waterstop plates 10 stacked upward so as to close the opening A, and left and right waterstop plate support portions 20, 20 that support the waterstop plates 10 on both sides of the opening A, and blocks water trying to enter from the outdoor side to the indoor side with the plurality of waterstop plates 10.

[0014] Each waterstop plate 10 includes a plate body 11, a waterproof material 12 (see FIGS. 3 and 13) that is pressure - contacted with the waterstop plate support portion 20 at both end sides in the lateral width direction of the plate body 11, a waterproof material 13 that is pressure - contacted with the lower surface (for example, the upper end surface of the waterstop plate 10 adjacent to the lower side or the floor surface, etc.) at the lower end side of the plate body 11, a lower engaging portion 14 that engages with the lower engaging portion 31 of the waterstop plate support portion 20 from one side in the waterstop plate thickness direction (the outdoor side according to the illustrated example) at each of the left end side and the right end side of the plate body 11, and an upper engaging portion 15 that engages with the upper engaging portion 32 of the waterstop plate support portion 20 from the same one side.

[0015] The plate body 11 is formed in a horizontally long rectangular shape by a hard material such as metal, and one end side and the other end side in its longitudinal direction are respectively positioned so as to overlap the outdoor side surface of the waterstop plate support portion 20. According to the illustrated example, this plate body 11 is formed by connecting a plurality of horizontally long rectangular members formed by drawing in the vertical direction (see FIGS. 9 and 10), but as another example, it can also be formed from a single horizontally long rectangular member.

[0016] The watertight materials 12 and 13 are elongated members made of elastic materials such as rubber or elastomer resin.

[0017] The watertight material 12 is fixed to the indoor-facing surfaces at the left and right ends of the plate body 11, and extends continuously along approximately the entire vertical length of the plate body 11. This watertight material 12 contacts the outdoor side surface of the watertight plate support portion 20 from one side in the thickness direction of the watertight plate (the outdoor side in the illustrated example) along approximately its entire length. Then, the watertight material 12 is pressed against the waterstop plate support part 20 in a watertight manner by the water pressure that the waterstop plate 10 receives from the outside.

[0018] The other watertight material 13 is fixed so as to protrude downward from the lower end of the plate body 11 and extends continuously along approximately the entire width of the plate body 11. This watertight material 13 is in contact with the upper end of the lower water-stopping plate 10 or the floor surface, etc., along approximately its entire length. Furthermore, this watertight material 13 is pressed against the lower surface in a watertight manner by the weight of the water-stopping plate 10.

[0019] The lower engaging portion 14 is formed to protrude from the indoor side of the plate body 11 at one end of the plate body 11 in the lateral direction, and to engage with the lower engaged portion 31 on the water-stopping plate support portion 20 side from the outdoor side at an oblique angle above (see Figure 9).

[0020] The upper engaging portion 15 protrudes from the indoor side of the plate body 11 at one end in the lateral direction of the plate body 11 and engages with the upper engaged portion 32 of the water-stopping plate support portion 20 by approaching it from the diagonally upper side on the outdoor side, preventing it from disengaging. This engaged state can be released by manual operation of a disengagement mechanism (not shown).

[0021] Furthermore, the water-stopping plate support section 20 integrally comprises a support column 21 erected on one end side in the width direction of the opening A, and a support plate 24 fixed to the surface of the support column 21 on the side facing the opening A. Multiple sets of axial lower engaging portions 31 and upper engaging portions 32 are fixed to the water-stopping plate support portion 20, protruding from the side surface of the opening A (the surface of the support plate 24 in the illustrated example) and spaced apart in the vertical direction.

[0022] The support column 21 is a long, slender member made of a hard material such as metal. As shown in the illustrated example, the support column 21 is integrally composed of a C-channel-shaped main body portion 21a that is continuous in the vertical direction, and a reinforcing member 21b that reinforces the main body portion 21a so as to close the opening of the main body portion 21a. The wall portion of the support column 21 on the side of opening A is provided with a through hole (not shown) that communicates with the insertion holes 24a and 24b, which will be described later. Furthermore, a nut-shaped member (for example, a weld nut, not shown) is fixed to the back side of the through hole, which is screwed onto the lower engaging portion 31 and the upper engaging portion 32, respectively.

[0023] The support plate 24 is a long, continuous plate-like member extending vertically. The support plate 24 is provided with multiple sets of through holes 24a for inserting the base end of the lower engaging portion 31 and through holes 24b for inserting the base end of the upper engaging portion 32, spaced at predetermined intervals in the vertical direction (see Figure 5). Furthermore, the support column 21 and the support plate 24 can be made as a single integrated component. That is, if through holes 24a and 24b are directly formed on the surface of the support column 21 on the side of opening A, the support plate 24 can be omitted.

[0024] The lowest insertion hole 24a in the support plate 24 is formed in a circular shape (round hole) that fits the base end of the lower engaging portion 31 in a fixed vertical position. The insertion holes 24b and 24a, which are located above the lowest insertion hole 24a, are both formed as elongated holes in the vertical direction so that the upper engaged portion 32 and the lower engaged portion 31 can be adjusted vertically (see Figure 5).

[0025] Furthermore, the through-hole 24b is located on the indoor side of the through-hole 24a. In other words, the through hole 24a is positioned offset from the through hole 24b to one side in the thickness direction of the water-stopping plate (the outdoor side in the illustrated example). Therefore, as shown in Figure 4, the lower engaging portion 31 that fits into the insertion hole 24a is positioned with a dimensional W offset from the upper engaging portion 32 that fits into the insertion hole 24b, on one side in the thickness direction of the water-stopping plate (the outdoor side according to Figure 4).

[0026] The lower engaging portion 31 integrally comprises a base shaft portion 31a inserted through the support column 21 and the support plate 24, a flange portion 31b that non-rotatably fits onto the installation jig 2 for the water-stopping plate engaging portion (described later), and an engaging shaft portion 31c that engages with the lower engaging portion 14 of the water-stopping plate 10 (see Figure 5). The base shaft portion 31a is formed in a cylindrical shape and has a male threaded portion at its tip. This male threaded portion is screwed into and tightened onto a nut-shaped member (not shown) inside the support column 21.

[0027] The flange portion 31b is formed in a rectangular prism shape according to the illustrated example. This flange portion 31b only needs to fit non-rotatably onto the installation jig 2 for the water-stopping plate engagement portion, and can also be a polygonal prism shape such as a hexagonal prism or a shape with two parallel faces.

[0028] The upper engaging portion 32 is a component with the same shape as the lower engaging portion 31, and integrally includes a base portion 32a, a flange portion 32b, and an engaging shaft portion 32c. In the illustrated example, the upper engaging portion 32 has the same shape as the lower engaging portion 31 and is a common part. Similar to the lower engaging portion 31, the upper engaging portion 32 is also screwed into and tightened with a nut-shaped member (not shown) inside the support column 21 by the male screw portion at the tip of the base shaft portion 32a.

[0029] Next, the manufacturing characteristics of the water-stopping device 1 with the above configuration will be described in detail. When attaching the lower engaging portion 31 and the upper engaging portion 32 to the water stop plate support portion 20, the installation jig 2 for the water stop plate engaging portion is used (see Figure 5).

[0030] The installation jig 2 for the water-stopping plate engagement portion is a jig for positioning the lower engagement portion 31 and the upper engagement portion 32 in the water-stopping device 1 described above.

[0031] This installation jig 2 for the water-stopping plate engagement portion has a first fitting portion 2a on one end in the longitudinal direction that can be fitted onto the flange portion 31b of the lower engagement portion 31, a second fitting portion 2b on the other end that can be fitted onto the upper engagement portion 32, and a third fitting portion 2c between the first fitting portion 2a and the second fitting portion 2b that can be fitted onto the upper engagement portion 32.

[0032] The first fitting portion 2a is formed in a concave shape that is non-rotatable and fits onto the flange portion 31b of the lower engaging portion 31 from above. The second fitting portion 2b is formed in a concave shape that is non-rotatable and fits from below onto the flange portion 32b of the upper engaging portion 32. The third fitting portion 2c is formed in the shape of a square hole that fits non-rotatably and annularly into the flange portion 32b of the upper engaging portion 32.

[0033] In other words, the first fitting portion 2a, the second fitting portion 2b, and the third fitting portion 2c, and the corresponding lower engaged portion 31 or upper engaged portion 32, are fitted together so that their flat surfaces overlap each other, preventing rotation. More specifically, for example, the flat portion of the inner circumferential surface of the square-shaped third fitting portion 2c overlaps with the flat portion of the outer circumferential surface of the flange portion 32b of the upper engaged portion 32. The shapes of the first fitting portion 2a, the second fitting portion 2b, and the third fitting portion 2c may be other shapes than those shown, as long as they have the flat surface on their inner surface.

[0034] The pitch P1 of the first fitting portion 2a and the second fitting portion 2b is set to be approximately the same as the pitch of the lower engaging portion 14 and the upper engaging portion 15 in a single water-stopping plate 10. The pitch P2 between the third fitting portion 2c and the first fitting portion 2a is set to be approximately the same as the pitch between the upper engaging portion 15 of the lower water stop plate 10 and the lower engaging portion 14 of the upper water stop plate 10, 10, which are adjacent to each other vertically.

[0035] The first fitting portion 2a is offset by a dimension W toward the outdoor side relative to the second fitting portion 2b, and offset by a dimension W toward the indoor side relative to the third fitting portion 2c (see Figure 6).

[0036] The following steps illustrate the procedure for fixing the lower engaging portion 31 and the upper engaging portion 32 to the water stop plate support portion 20 using the installation jig 2 for the water stop plate engaging portion. First, in the first step, the lower engagement portion 31, which serves as the reference, is fixed to the lowest insertion hole 24a in the support plate 24 of the water-stopping plate support portion 20 (see Figures 5 and 7(a)). More specifically, the lower engaging portion 31 is fixed immovably by inserting its base portion 31a through the insertion hole 24a and a through hole (not shown) in the peripheral wall of the support column 21, and then screwing and tightening it onto a nut-shaped member (not shown) on the back side of the support column 21. The lower engaging portion 31 fixed in this first step corresponds to the lower engaging portion 14 of the lowest water-stopping plate 10.

[0037] In the next step, the first fitting portion 2a of the installation jig 2 for the water-stopping plate engagement portion is turned downward and fitted into the previously fixed lower engagement portion 31 (see Figures 5 and 7(b)). In this step, the second fitting portion 2b faces upward.

[0038] In the next third step, the upper engaging portion 32 is fitted into the upward-facing second fitting portion 2b of the installation jig 2 for the water-stopping plate engaging portion and fixed to the water-stopping plate support portion 20 (see Figures 5 and 7(b)(c)). According to the above process, the upper engaging portion 32 is inserted through the elongated insertion hole 24b of the support plate 24 and then fits into the second fitting portion 2b of the installation jig 2 for the water-stopping plate engaging portion, thereby positioning it with high precision in the vertical direction. The upper engaging portion 32 is then fixed immovably by being screwed into and tightened onto a nut-shaped member (not shown) inside the support column 21.

[0039] In the next fourth step, the third fitting portion 2c of the installation jig 2 for the water-stopping plate engagement portion is fitted annularly onto the upper engagement portion 32, with the first fitting portion 2a facing upward (see Figures 5 and 8(b)).

[0040] In the next fifth step, the lower engaged portion 31 corresponding to the lower engaging portion 14 of the upper water-stopping plate 10 to be stacked is fitted into the first fitting portion 2a facing upwards and fixed to the water-stopping plate support portion 20 (see Figures 5 and 8(b)(c)). More specifically, the lower engaging portion 31 is inserted into the elongated through-hole 24a (see Figure 5) of the support plate 24 and then fits into the second fitting portion 2b, thereby positioning it with high precision in the vertical direction. This lower engaging portion 31 is then fixed immovably by being screwed onto and tightened onto a nut-shaped member (not shown) inside the support column 21.

[0041] The installation jig 2 for the water-stopping plate engagement portion used in the fifth step may be the same as the installation jig 2 for the water-stopping plate engagement portion used in the second step, but another installation jig 2 for the water-stopping plate engagement portion of the same shape may also be used. Furthermore, although the illustrated example shows the installation jig 2 for the water-stopping plate engagement portion being removed after the fifth step, in other examples, the water-stopping device 1 may be used with the installation jig 2 for the water-stopping plate engagement portion remaining attached to the water-stopping plate support portion 20.

[0042] In addition, as another example of the fourth step described above, it is also possible to adjust the dimensions of each part so that the second fitting part 2b faces upward and the third fitting part 2c is fitted into the upper engaged part 32. In this case, in the fifth step described above, the lower engaged part 31 is fitted into the upward-facing second fitting part 2b and fixed to the water stop plate support part 20.

[0043] Therefore, according to the above manufacturing method, the dimensional accuracy of the pitch between the lower engaging portion 31 and the upper engaging portion 32 corresponding to each water-stopping plate 10, and the pitch between the upper engaging portion 32 corresponding to the lower water-stopping plate 10 and the lower engaging portion 31 corresponding to the upper water-stopping plate 10, can be improved, and the lower engaging portion 31 and the upper engaging portion 32 can be easily fixed in the correct position.

[0044] Next, we will describe in detail the characteristics of the work involved in installing the water-stopping plate 10 between the left and right water-stopping plate support sections 20, 20. The water-stopping plate 10 is transported by workers or other personnel and installed from the outside between the left and right water-stopping plate support sections 20, 20. At this point, the worker lifts the water stop plate 10 and, as shown in Figure 9, first brings the lower end of the water stop plate 10 closer to the water stop plate support 20. Then, after engaging the lower engaging portion 14 of the water-stopping plate 10 with the lower engaged portion 31, the water-stopping plate 10 is rotated in one direction (clockwise, as shown in the illustrated example) around the lower engaged portion 31 to engage the upper engaging portion 15 with the upper engaged portion 32 (see Figure 10).

[0045] As described above, in the process of engaging the lower engaging portion 14 before the upper engaging portion 15, the lower engaged portion 31 is located further outwards (towards the water stop plate 10) by a dimension W compared to the upper engaged portion 32 (see Figure 4), thus improving workability.

[0046] <Variation> According to the above embodiment, in a particularly preferred form, the lower engaged portion 31 and the upper engaged portion 32 are formed in the shape of a cylindrical shaft. However, in other examples, the lower engaged portion 31 and the upper engaged portion 32 can also be formed in the shape of a polygonal cross-section shaft or in the shape of a shaft of other shapes.

[0047] Furthermore, other examples of the installation jig for the water-stopping plate engagement portion include a configuration having a concave fitting portion with an open side, or a configuration having a fitting portion of other shapes. In addition, the number of fitting portions 2a, 2b, and 2c can be two or four or more.

[0048] Furthermore, although the above embodiment involves stacking three water-stopping plates 10, it is also possible to use a single water-stopping plate 10, or to stack two or four or more water-stopping plates 10.

[0049] Furthermore, in the above embodiment, the water-stopping device 1 was used to prevent water generated on the outdoor side due to flooding, etc., from entering the indoor side. However, in another example, the water-stopping device 1 could be positioned with its front and back reversed to prevent water generated on the indoor side from flowing into the indoor side.

[0050] The present invention is not limited to the embodiments described above and can be modified as appropriate without altering the essence of the invention. [Explanation of Symbols]

[0051] 1: Water stop device 2: Installation jig for the water-stopping plate engagement portion 2a: First fitting part 2b: Second mating part 2c: Third mating part 10: Water stop plate 11: Main body of the board 14: Lower engagement part 15: Upper engagement part 20: Water stop plate support section 24a: Through hole 24b: Through hole 31: Lower engaged part 32: Upper engaged part A: Opening P1, P2: Pitch

Claims

1. In a water-stopping device in which the opening between the left and right water-stopping plate support parts is closed by a water-stopping plate, The left and right water-stopping plate support portions are provided with a lower engaging portion and an upper engaging portion on the side surface facing the opening, spaced apart in the vertical direction. The water-stopping plate is provided with a lower engaging portion on each of its left and right ends, which engages with the lower engaging portion from one side in the thickness direction of the water-stopping plate, and an upper engaging portion which engages with the upper engaging portion from the one side. The upper engaged portion and the lower engaged portion are each formed in an axial shape that protrudes toward the opening from each of the left and right water-stopping plate support portions, The water-stopping device is characterized in that the lower engaged portion is positioned offset to one side relative to the upper engaged portion.

2. The water-stopping device according to claim 1, characterized in that the lower engaging portion engages with the lower engaged portion from an obliquely upward position.

3. The water-stopping device according to claim 1 or 2, characterized in that the upper engaging portion engages with the upper engaged portion in an irremovable manner and constitutes an engagement / disengagement mechanism for releasing this engagement state by a predetermined operation.

4. The water-stopping device according to any one of claims 1 to 3, characterized in that the water-stopping plate is pressed in a watertight manner against the left and right water-stopping plate support portions from one side in the thickness direction of the water-stopping plate, and the protruding lower engaging portion and the upper engaging portion engage with the lower engaged portion and the upper engaged portion, respectively.

5. An upper insertion hole and a lower insertion hole are provided on the side surface of the water-stopping plate support portion facing the opening, with a predetermined distance between them in the vertical direction. The lower insertion hole is provided on one side of the upper insertion hole, The water-stopping device according to any one of claims 1 to 4, characterized in that the lower engaging portion is fitted into the lower insertion hole and installed on the opening-side surface of the water-stopping plate support portion, and the upper engaging portion is fitted into the upper insertion hole and installed on the opening-side surface of the water-stopping plate support portion, so that the lower engaging portion is positioned offset to one side relative to the upper engaging portion.

6. An installation jig for a water-stopping plate engagement portion used in the manufacture of a water-stopping device that closes the opening between left and right water-stopping plate support portions with a water-stopping plate, The left and right water-stopping plate support portions are provided with a lower engaging portion and an upper engaging portion on the side surface facing the opening, spaced apart in the vertical direction. The water-stopping plate is provided with a lower engaging portion on each of its left and right ends, which engages with the lower engaging portion from one side in the thickness direction of the water-stopping plate, and an upper engaging portion which engages with the upper engaging portion from the one side. The lower engaged portion is positioned offset to one side relative to the upper engaged portion, It has a first fitting portion for fitting and positioning the lower engaging portion and a second fitting portion for fitting and positioning the upper engaging portion, which are integrally formed at a predetermined distance in the vertical direction. The installation jig for the water-stopping plate engagement portion is characterized in that the first fitting portion is positioned offset to one side relative to the second fitting portion.

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