JP5714447B2 - Water stop device at underground entrance - Google Patents

Description

  The present invention relates to a water stop device for an underground entrance that can prevent the inflow of water into the basement by stopping the underground entrance to a subway or an underground passage including a ground opening during a disaster such as a flood.

  Conventionally, both ends of the entrance wall of the structure are provided with pillars at both ends, and the waterproof sheet previously folded and stored below the floor between the pillars at both ends is pulled up, and the upper edges of both sides of the waterproof sheet are established at both ends. By locking to the pillars, the gap between the both ends established pillars is closed with the waterproof sheet, and the both ends of the sheet are pressed against the both edges of the waterproof sheet, so that both ends of the sheet are established with the both ends established pillars and the abutting pillars. Passage water stop device that prevents water from flowing from the outside of the passage to the inside of the passage by the waterproof sheet, and prevents water from flowing into the underground structure in the passage during flooding, etc. Has been proposed (Patent Document 1).

  In addition, a waterproof plate has been proposed that prevents water flowing into the subway premises by closing a subway entrance installed on the ground in the event of a flood or the like with a waterproof plate (Patent Document 2).

JP 2005-226411 A JP-A-7-247766

  By the way, since all of the techniques described in the above-mentioned patent documents are designed to stop only the passage entrance, a U-shaped wall is formed around the ground opening of the underground entrance, like a subway entrance installed on the ground. In a structure in which a board is constructed, there is a risk that the water level will rise and exceed the height of the wall board (for example, 5 m) during a large-scale flood.

  Therefore, it is desired to realize a water stop device that can respond to water stoppage in the case of such a large-scale flood.

  The present invention has been made in view of the above-described conventional problems. In a structure having a ground opening surrounded by a wall plate such as a subway entrance installed on the ground, the water level exceeds the height of the wall plate. However, an object of the present invention is to provide a water stop device for an underground entrance that can prevent water from flowing underground.

In order to achieve the above object, the present invention
First, an underground passage is formed from the ground opening portion toward the basement, and a wall plate having a predetermined height is erected in a substantially U shape around the ground opening portion. A water stop device for an underground entrance in which an entrance passage toward the passage is formed, and a water stop engagement rod extending from the rear end position of the wall plate to the entrance passage is provided in the front-rear direction on both sides of the left and right wall plates. Left and right both-end establishment pillars that reach the ground surface of the inlet passage at the front ends of the both water-stopping engagement rods, and the ground surface corresponding to the installation positions of the left and right both-end establishment pillars. A waterproof sheet with a horizontal groove formed between the left and right wall plates and a rear edge fixed to the rear end of the wall plate in a water-stopped state is stretched horizontally on the left and right water-stopping engagement rods. In addition, the waterproof sheet is vertically stretched in front of the left and right both ends establishment pillars, and the front edge of the waterproof sheet is It is configured to be able to be locked in the left and right direction recessed grooves, and by pressing and fixing the presser hooks to the left and right side edges of the waterproof sheet positioned between the left and right water-stopping engagement ribs, The left and right side edges on the horizontal surface of the waterproof sheet are clamped and fixed to the left and right side edges of the waterproof sheet positioned in front of the left and right ends of the waterproof sheet by sandwiching the left and right side edges in the horizontal plane in a water-stopped state. The front edge of the waterproof sheet is held in a water-stopped state by clamping both sides of the waterproof sheet in a water-stopped state, and pressing a presser foot to the front end edge of the waterproof sheet located in the left and right groove. It is composed of a water stop device at the underground entrance.

  The underground passage is, for example, a staircase (4), but may be a slope or the like. The both side positions of the left and right wall plates provided with the water stop engagement rod are, for example, the opposed positions near the upper end of the wall plate on the opposed surfaces (5 ″, 5 ″) of the left and right wall plates (5, 5). Say. The rear end position of the wall plate refers to, for example, the rear end position (Q) in the vicinity of the rear wall plate (5c) in the wall plate (5, 5). For example, when the waterproof sheet storage box (13) is used, the rear edge of the waterproof sheet is fixed to the rear end of the wall plate in a water-stopped state. It means that the rear edge (15a) of the waterproof sheet (15) is fixed to the water-stopped state at the front end in the storage box (13) (see FIG. 6), and when the storage box (13) is not used, This means that the rear edge (15a) of the waterproof sheet (10) is fixed to the rear wall (5c) of the rear end of the wall plate (5) in a water-stopped state. “Fixed in a water-stopped state” means that the rear edge (15a) of the waterproof sheet (15) is adhered to the rear end of the storage box (13) or the wall plate (5) across the entire left and right direction. Say. If comprised in this way, since not only the vertical surface between the entrance passages of an underground entrance but the horizontal surface between right and left wall boards can be covered with a waterproof sheet in a water-stopping state, the height of the wall board of an underground entrance will be exceeded. Even if a large-scale flood occurs, it is possible to reliably prevent water from flowing into the underground premises.

  Secondly, engaging pins of the reinforcing net are connected to the left and right wall plates and the left and right grooves, respectively, and the left and right edges of the reinforcing net are engaged on the inner surface side of the stretched waterproof sheet. The reinforcing net is horizontally stretched between the left and right wall plates by being locked to a pin, and the reinforcing net is vertically stretched between the left and right both end establishment pillars, and the front edge of the reinforcing net is further extended. It is comprised so that it can latch to the said engaging pin in the said left-right direction ditch | groove, It is comprised by the water stop apparatus of the underground entrance of the said 1st characterized by the above-mentioned.

  The inner surface side of the waterproof sheet refers to the lower surface side of the waterproof sheet in the horizontal plane of the waterproof sheet and the rear surface side of the waterproof sheet in the vertical surface of the waterproof sheet. With this configuration, since the reinforcement net is located on the inner surface of the waterproof sheet, even if it is submerged on the waterproof sheet covering the space between the wall plates, the water pressure is received by the reinforcement net located inside. And can exhibit high waterproofness.

  Third, the waterproof sheet is installed at the rear end of the wall plate in a state where the waterproof sheet is folded and stored in a state where the rear edge is fixed in a water-stopped state. The first or second structure, wherein the first or second structure is configured to be stretched between the left and right water-stopping engagement rods and between the left and right both-end establishment pillars by being drawn out from the storage portion toward the inlet passage. Consists of the described underground entrance water stop device.

  The rear end portion of the wall plate refers to, for example, a portion on the back wall plate (5c). The waterproof sheet storage unit refers to, for example, a waterproof sheet storage box (13). If comprised in this way, a waterproof sheet can be beforehand accommodated in an underground entrance, and a water stop apparatus can be comprised rapidly in an underground entrance.

Fourth, a reinforcing net storage unit is installed in which the reinforcing net is folded and stored at a rear end portion of the wall plate in a state where a rear end edge thereof is fixed, and the reinforcing net is connected to the reinforcing net storage unit from the reinforcing net storage unit. According to the water stop device for an underground entrance according to the second aspect, it is configured such that it can be stretched between the left and right wall plates and between the left and right both ends establishment pillars by being drawn out to the entrance passage side. Composed

  The rear end portion of the wall plate refers to, for example, a rear portion of the left and right wall plates (5). A reinforcement net storage part means a reinforcement net storage box (10), for example. If comprised in this way, a reinforcement net can be beforehand accommodated in an underground entrance, and a water stop apparatus can be comprised quickly in an underground entrance.

  Fifth, the waterproof structure of the right and left side edges and the front end edge of the waterproof sheet is an elastic body located on one side of the waterproof sheet and linearly positioned along the left and right side edges or front edge of the waterproof sheet. A water stop member provided, and a presser member provided with a protrusion located on the other side of the waterproof sheet and capable of being crimped to the elastic body, the elastic body of the water stop member and the protrusion of the presser member. Any one of the first to fourth aspects, wherein the waterproof member and the pressing member are pressure-bonded by a fastening means in a state where the right and left side edges or the front end edge of the waterproof sheet is sandwiched by a strip. It is comprised by the water stop apparatus of the underground entrance described in the above.

  One side of the waterproof sheet refers to, for example, the back side of the waterproof sheet, and the other side of the waterproof sheet refers to, for example, the front side of the waterproof sheet. The water stop member refers to a water stop engagement rod (18), left and right both side establishment pillars (25), a water stop engagement horizontal rod (30), and the like. The presser member refers to a presser bar (22), a presser column (27a), a presser horizontal bar (27b), and the like. The fastening means refers to, for example, a bolt (B). The said protrusion means the protrusion (23) for water stop etc. of a cross-sectional triangle shape, for example. If comprised in this way, each edge part of a waterproof sheet can be clamped by the crimping | compression-bonding of a water stop member and a pressing member, and it can stop water reliably.

  Sixth, it is constituted by a water stop device for an underground entrance according to any one of the first to fifth aspects, wherein a reinforcing reed is fixed between the upper end portions of the left and right both ends establishment pillars.

  If comprised in this way, since a reinforcement horizontal space is located in the boundary part of the horizontal extending surface between the said wall boards of the waterproof sheet, and the vertical extending surface between the said right and left both ends establishment pillar, the horizontal and vertical of the said waterproof sheet It is possible to reinforce the tensioning surface.

  Seventhly, in a plurality of positions in the front-rear direction between the left and right wall plates, wires are stretched in the left-right direction inside the reinforcing net, according to any one of the second to sixth aspects, It consists of a water stop device at the underground entrance.

  The inner side of the reinforcing net means the lower surface side of the reinforcing net in the horizontal plane of the reinforcing net and the rear surface side of the reinforcing net in the vertical plane of the reinforcing net. The said wire can be comprised by the wire rope made from stainless steel, for example. If comprised in this way, the water stop apparatus which can support a reinforcement net | network with a wire and can fully respond to a bigger water pressure is realizable.

  As described above, the present invention can cover not only the vertical surface between the entrance passages of the underground entrance but also the horizontal surface between the left and right wall plates in a waterproof state with the waterproof sheet. Even if a large flood with a high water level exceeding this level occurs, it is possible to reliably prevent water from flowing into the underground premises.

  In addition, since the reinforcement net is located on the inner surface of the waterproof sheet, even if it is submerged on the waterproof sheet that covers the space between the wall plates, the inner reinforcement net can catch the water pressure and is highly waterproof. Can be demonstrated.

  Moreover, a waterproof sheet or a reinforcement net can be stored and arranged in advance at a predetermined position of the underground entrance, and a water stop device can be quickly configured at the underground entrance.

  Moreover, the water-proofing member and the presser member can be securely stopped by clamping the side edge of the waterproof sheet by pressure bonding.

  In addition, since the reinforcement lateral is located at the boundary between the horizontal extending surface between the wall plates of the waterproof sheet and the vertical extending surface between the left and right both ends established columns, the horizontal and vertical extending surfaces of the waterproof sheet Can be reinforced, and can exhibit high waterproofness.

  Further, by stretching a wire inside the reinforcing net, it is possible to receive a larger water pressure and to exhibit extremely high waterproofness.

1 is a partially omitted perspective view of an underground entrance to which a water stop device for an underground entrance according to the present invention is applied. It is side surface sectional drawing of the underground entrance which applied the apparatus same as the above. It is a top view of the underground entrance to which the same apparatus is applied. It is a partially-omission perspective view in the middle of the assembly of the underground entrance to which the same apparatus is applied. It is a partially-omission perspective view in the middle of the assembly of the underground entrance to which the same apparatus is applied. It is a partially-omission perspective view of the underground entrance to which the same apparatus is applied. It is a cross-sectional view of one water stop engaging part in the underground entrance to which the same apparatus is applied, (a) is a combined state of the water stop engaging bar and the presser bar, (b) is a state where the presser bar is removed, (C) shows the state which pinched | interposed the waterproof sheet. It is a longitudinal cross-sectional view of the left-right direction ditch | groove in the underground entrance which applied the apparatus same as the above, (a) is a fitting state of the front fixing bar, (b) is a state where the front fixing bar is removed, and (c) is a waterproof sheet. The state of being pinched is shown. (A) is an enlarged front view of the left establishment pillar of the left and right both ends establishment pillar in the underground entrance to which the above apparatus is applied, and (b) is an enlarged front view of the reinforcement pillar in the underground entrance to which the apparatus is applied. It is a cross-sectional view which shows the crimping | compression-bonding state of a left establishment pillar same as the above and a press pillar in the underground entrance to which the same apparatus is applied. It is a perspective view which shows the water stop structure in the underground entrance which applied the apparatus same as the above, (a) is the connection relationship between the right and left both ends establishment column and the presser column, and (b) is the connection between the water stop engagement rod and the presser rod. (C) is a figure which shows the coupling | bonding relationship of the engagement rod for water stop, and a presser recumbent. It is a partial expansion perspective view of the fixed bar which shows the water stop state of the front fixed bar of an apparatus same as the above. It is a perspective view of the underground entrance in other embodiments. It is a cross-sectional view near the engaging portion for water stop of the water stop device in another embodiment. The embodiment in the case of using a wire is shown, (a) is a schematic cross-sectional view in the vicinity of the engaging portion for water stop, and (b) is a cross-sectional view in the vicinity of the left establishment.

  Hereinafter, the water stop apparatus of the underground entrance which concerns on this invention is demonstrated in detail.

  FIG. 1 shows an underground entrance 1 to a subway, an underground passage or the like to which a water stop device for an underground entrance according to the present invention is applied. The underground entrance 1 is a rectangular shape that opens to the ground G and communicates with the underground premises. Surrounded by a ground opening 2, a wall plate 5 standing in a substantially U-shape at a predetermined height (for example, 5 m) around the ground opening 2, and the opposing left and right wall plates 5, 5, It is constituted by the entrance passage 3 facing the formed underground passage R. The ground in the entrance passage 3 is referred to as the ground surface 3 '. Further, in FIG. 1, the left and right directions when the entrance passage 3 side is directed forward, the rear wall plate 5c side is directed rearward, and the front to rearward are defined as the left-right direction.

  The wall plate 5 is erected on both sides of the entrance passage 3 to form a left gate column wall plate 5a and a right gate column wall plate 5b that form a gate column, and a rear wall plate 5c that forms the back surface (rear end portion) of the wall plate 5. Thus, it is configured in a substantially U shape in plan view.

  A plurality of small columns 6 are erected on the upper surface 5 ′ of the left and right gate wall plates (left and right wall plates) 5 a and 5 b and the upper surface 5 ′ of the rear wall plate 5 c, and the upper surface 5 ′ is placed on these small columns 6. A fall prevention rod 7 is fixed in parallel with.

  Further, two large columns 8 are erected on the upper surfaces 5 ′ of the left and right gate column wall plates 5 a and 5 b, respectively, and a plate-like roof 9 is provided on the large columns 8 from the upper surface of the entrance passage 3 to the stairs 4. Is provided so as to cover the entire upper part (see FIG. 2).

  A reinforcing net storage box 10 is fixed to the opposite surface 5 ″ on the rear side (the rear end portion of the wall plate 5) of the left and right gate wall plates 5a and 5b over the entire left and right direction. 4 and 5, a reinforcing net 11 that can be pulled out in the direction of the inlet passage 3 is housed in a folded state (see FIG. 2). The rear end edge 11a of the net 11 is fixed in the reinforcing net storage box 10. Reference numeral 10a denotes an opening lid of the reinforcing net storage box 10.

  The reinforcement net 11 is pulled out from the storage box 10 to the inlet passage 3 side, and as shown in FIG. 5, the front end edge 11b can be locked in the left and right concave groove 12 at the lower end of the inlet passage. It is configured (see FIG. 8).

  This reinforcing net 11 is located on the lower side (inner side) of a waterproof sheet 15 described later (see FIG. 5), and supports the back side of the waterproof sheet 15 by receiving the water pressure when it is submerged on the waterproof sheet 15. Is.

  The reinforcing net 11 has a rectangular (rectangular) belt shape elongated in the front-rear direction, and the rear edge 11a is fixed to the inner surface of the reinforcing net storage box 10 and is folded in a zigzag manner as shown in FIG. In the storage box 10.

  The reinforcing net 11 is a resin net composed of a square mesh having a side of about 100 mm, and its horizontal width is an interval T1 between engagement pins 17a and 17a between the left and right wall plates 5 (see FIG. 3). ), And the length in the longitudinal direction (front-rear direction) is the opening side formed between the wall plates 5 and 5 on the ground opening 2 as shown in FIG. It has a length that covers the entire horizontal water blocking surface 14 ′, covers the passage-side vertical water blocking surface 14 between the left and right both ends establishment pillars 25, 25, and can lock the front end edge 11 b in the left and right groove 11. doing. The left and right side edges 11c of the reinforcing net 11 do not cover the front sides of the left and right end established columns 25 and 25, and are positioned between the opposing surfaces of the left and right end established columns 25 and 25 (FIG. 3). FIG. 5).

  As the reinforcing net 11, for example, a knotless net made of polyethylene can be used. That is, the reinforcing net 11 is a non-knotted net having a square mesh using a rope (rope) having a diameter of about 10 mm formed by bringing polyethylene yarns close together (for example, 100 mm per side). 1m wide (10 ropes) tensile strength 12tf).

  On the rear side of the reinforcing net storage box 10, a waterproof sheet storage box 13 is disposed on the upper surface 5 ′ of the rear end portions (rear end portions of the wall plate 5) of the left and right gate wall plates 5 a and 5 b. The storage box 10 is fixed at the upper position. As shown in FIGS. 5 and 6, a waterproof sheet 15 that can be pulled out in the direction of the entrance passage 3 is stored in a folded state in the waterproof sheet storage box 13 at a position above the reinforcing net 11. (See FIG. 2). The rear edge 15a of the waterproof sheet 15 is fixed in a water-stopping state over the entire region in the left-right direction (hatched portion along the line P1 in FIG. 6) at the front end position of the opening in the storage box 13. Reference numeral 13 a denotes an opening lid of the waterproof sheet storage box 13.

  In this way, the waterproof sheet 15 is pulled out to the inlet passage 3 side above the reinforcing net 11 and stretched between the left and right wall plates 5a and 5b as shown in FIG. It is constructed so as to be stretched between the columns 25 and 25, and its front end edge 15b can be locked in the left and right concave groove 12 at the lower end of the inlet passage 3 (see FIG. 8).

  This waterproof sheet 15 is located above the reinforcing net 11 and prevents water from flowing into the underground premises when the water level rises above the height of the wall plate 5 in a flood or the like. The waterproof sheet 15 has a rectangular (rectangular) belt shape as a whole, and the rear end edge 15a is fixed to the inner surface of the storage box 13 in a water-stopped state over the entire lateral width, as shown in FIG. In the state of being folded in a zigzag manner, it is stored in the storage box 13.

  The waterproof sheet 15 is made of a resin sheet having a thickness of about 1 mm, and the width of the waterproof sheet 15 covers the entire width T2 (> T1) between the opposing surfaces of the left and right portal wall plates 5a and 5b. As shown in FIG. 3, the width T2 is substantially the same as the interval T2 (see FIGS. 3 and 5), and the front end edge 15b side from the position immediately before reaching the passage-side vertical water blocking surface 14 at the front end is recessed in the vertical direction. In order to cover the front faces of the left and right direction establishment pillars 25, 25 in the grooves 26, 26, a widened portion 15d having a lateral width similar to the interval T3 (> T2) between the front faces of the establishment pillars 25, 25 (in FIGS. 5 and 6). A portion on the front end edge 15b side from the broken line N) is formed (FIGS. 5 and 6).

As shown in FIG. 6, the longitudinal direction of the waterproof sheet 15 covers the entire opening side horizontal water blocking surface 14 ′ between the left and right wall plates 5, 5 on the ground opening 2, and the passage side vertical blocking Between the left and right establishment pillars 25, 25 on the water surface 14 side can be covered, and the front end edge 15b has a length that can be locked in the left and right groove 12. In addition, left and right side edges 15c, 15c of the waterproof sheet 15,
A plurality of eyelets 24 (through holes) are formed at predetermined intervals along the front edge 15b (see FIG. 5).

  Next, an engagement structure (water stop structure) of the reinforcing net 11 and the waterproof sheet 15 to the wall plate 5 and the left and right concave grooves 12 will be described.

  As shown in FIG. 7, in order to lock the left and right side edges of the reinforcing net 11 and the waterproof sheet 15 in a water-stopped state at opposite positions on both sides of the facing surface 5 ″ in the vicinity of the upper ends of the left and right gate wall plates 5, 5. 7, the water stop engaging portion 16 provided on the left gate column wall plate 5a will be described with reference to Fig. 7, but the opposing surface of the right gate column wall plate 5b is described. 5 ″ is also provided with a water-stop engaging portion 16 having a symmetrical structure at a symmetrical position (see FIG. 5).

  The water stop locking portion 16 includes an engagement rod 16 ′, a water stop engagement rod 18 on the engagement rod 16 ′, and a presser foot 22, and the engagement rod 16 ′. And the water stop engagement rod 18 are located at the upper end position of the opposing surface 5 ″ of the left and right gate column wall plates 5a, 5b from the start end position of the staircase 4 in the entrance passage 3, 5b is continuously and linearly provided horizontally in the front-rear direction until reaching the position of the front end of the tarpaulin storage box 13 (the rear end position Q of the left and right wall plates) at the rear end of 5b (FIG. 4). reference).

  This water stop 16 (see FIG. 7) is provided with the above-mentioned engaging rod 16 'which is long in the front-rear direction and whose mounting vertical surface 16a is fixed to the above-mentioned opposing surface 5' 'by a bolt B, Engagement pins 17a of the reinforcing net 11 are provided on the upper surface of the engagement rod 16 'at regular intervals (see FIG. 4), where 16b in FIG. It is an inner surface closing lid, and the engagement pin 17a is exposed by opening it around the fulcrum 16b ′.

  Accordingly, as shown in FIG. 7B, the inner surface closing lid 16b is opened to expose the engaging pin 17a, and the mesh of the left and right side edges 11c of the reinforcing net 11 is inserted into and engaged with the engaging pin 17a. Thus, the reinforcing net 11 is stretched on the opening 2 between the left and right engaging rods 16 ′ and 16 ′ (see FIG. 4).

  Further, the water stop engagement rod 18 is fixed to the upper surface 16 ″ of the engagement rod 16 ′. The water stop engagement rod 18 has the same length as the engagement rod 16 ′. And is provided in the front-rear direction on the entire upper surface of the engagement rod 16 '(see FIG. 4).

  A concave groove 19 in the front-rear direction is provided on the upper surface 18 ′ of the water-stopping engagement rod 18 over the entire area in the front-rear direction, and an elastic body 20 for water stop is provided in the entire area of the concave groove 19. It is fitted and attached (see FIGS. 7 and 11B). Further, on the outer surface of the concave groove 19 on the upper surface 18 ′ of the water stopping engagement rod 18, an engagement pin 21 for engaging the eyelet 24 of the waterproof sheet 11 is formed to protrude upward at regular intervals. (See FIG. 11B). The engaging pin 21 has a cylindrical shape, and a female screw (screw hole) 21a for screwing a bolt B described later is formed therein. Accordingly, as shown in FIGS. 7B and 7C, the waterproof sheet 15 is opened by inserting and engaging the eyelets 24 of the left and right side edges 15c of the waterproof sheet 15 to the left and right engaging pins 21. It is configured to be stretched on the portion 2 (see FIG. 5).

  The upper surface 18 'of the water stop engagement rod 18 is usually covered with a plurality of presser rods 22 (see FIG. 1). As shown in FIG. 4, the presser bar 22 covers the entire upper surface 18 ′ of the water stop engaging bar 18 by connecting a plurality of short presser bars 22 in the front-rear direction.

  The single presser bar 22 is provided with a water stopping ridge 23 having a triangular cross section that is crimped to the elastic body 20 in the concave groove 19 in the state of being placed on the water stopping engaging bar 18. And a through hole 29 communicating with the screw hole 21a of the engagement pin 21 at the corresponding position of the engagement pin 21. Is provided. Accordingly, as shown in FIG. 7B, with the eyelet 24 of the waterproof sheet 15 engaged with the engagement pin 21, the presser foot 22 is pressure-bonded onto the water stop engagement rod 18, and the through hole is formed. The bolt B is inserted from 29 and screwed into the engaging pin 21 so that the water stopping protrusion 23 is pressed against the elastic body 20 with the right and left side edges 15c of the waterproof sheet 15 sandwiched therebetween. (FIG. 7 (c)), in such a state, it is configured so that it can be pressure-bonded and fixed onto the water stop engagement rod 18. At the same time, the upper surface 18 ′ of the water stop engagement rod 18 and the lower surface of the presser foot 22 are pressed together to hold the right and left side edges 15 c of the waterproof sheet 15 in a water stop state.

  Front end portions of the left and right water-stop engaging portions 16 are extended outwardly, and left and right both-end establishment columns 25 and 25 are respectively provided in succession to the left and right front end portions after widening. (See FIG. 1). The left and right both end establishment columns 25, 25 are erected and fixed upward from both ends of the left and right concave groove 12 of the inlet passage 3. The left and right both-end establishment columns 25, 25 are provided so as to be located inside the longitudinal grooves 26, 26 (see FIG. 3) provided in the facing surfaces 5 ″ of the left and right gate column wall plates 5a, 5b. Spaces S1 and S1 for inserting and engaging presser columns 27a and 27a of a front fixing bar 27 described later are provided on the front surface side (see FIG. 3).

  As shown in FIG. 9 (a), a vertical groove 40 is linearly provided on the front surfaces of the left and right both ends establishment pillars 25, 25, and an elastic body 41 is provided in the entire area of the groove 40. It is fitted and attached (see FIG. 12). The left and right presser columns 27a and 27a of the front fixing bar 27 are fixed to the front surfaces of the left and right end establishment columns 25 and 25 in a crimped state (see FIGS. 10, 11A, and 12). On the rear surfaces of the presser columns 27a and 27a, a water stopping ridge 42 having a triangular cross section that is crimped to the elastic body 41 is provided so as to protrude in the entire vertical direction. The entire area in the vertical direction of the left and right side edges 15c of the waterproof sheet 15 stretched on the side vertical water blocking surface 14 is set to a water blocking state (see FIGS. 10 and 12).

  The front fixing bar 27 is fitted into a concave space formed by the left and right concave grooves 12 and the spaces S1 and S1, and is a screw on the front surface of the presser bar 22 from the upper ends of the presser columns 27a and 27a. By inserting the bolt B into the hole 22a, the left and right end establishment pillars 25, 25 are pressure-bonded and fixed (see FIG. 4). The lower ends 27a ′ and 27a ′ of the presser columns 27a and 27a are fitted and inserted into fitting recesses 50 and 50 provided at both ends of the presser foot rod 27b (see FIGS. 4 and 12). Thus, the upper end portion is fastened to the presser foot 22 with the bolt B, so that the entire rear surface thereof is crimped to the entire front surface of the both ends establishment columns 25 and 25 with the left and right side edges 15c of the waterproof sheet 15 sandwiched therebetween. It becomes a state and it can be set as a water stop state over the up-down direction whole region of the right-and-left side edge 15c of the said prevention sheet 15 in the said vertical water stop surface 14 for a path | route (refer FIG.8 (c), FIG.10, FIG.12).

  As shown in FIG. 8, the left and right groove 12 of the vertical water blocking surface 14 for the passage is recessed one step lower than the ground G, and the engagement pin of the reinforcing net 11 is placed in the left and right groove 12. 43 is continuously fixed by a plurality of bolts B in the left-right direction (see FIG. 4). The engaging pin 43 is formed with a pin 43 ′ protruding forward (horizontal direction), and the mesh of the front end edge 11b of the reinforcing net 11 stretched in the vertical direction is locked to the pin 43 ′. (See FIG. 8 (c)).

  Further, in the left and right groove 12, on the front side of the engagement pin 43, a water stop engagement horizontal bar 30 is fixed to the entire left and right direction of the groove 12. On the upper surface 30 ′ of the water stop engagement horizontal gutter 30, a left and right concave groove 31 is provided in the entire lateral width region, and a water stop elastic body 32 is fitted in the entire recess groove 31. It is attached. Further, an engagement pin 33 for engaging the eyelet 24 of the front end edge 15b of the waterproof sheet 15 at a predetermined interval is provided in front of the concave groove 31 on the upper surface 30 'of the water stop engagement ridge 30. Is formed to protrude.

  The engaging pin 33 has a cylindrical shape, and a female screw (screw hole) 33a for screwing a bolt B described later is formed therein. Therefore, as shown in FIG. 8B, the front end edge 15b of the waterproof sheet 15 is bent forward in the horizontal direction, and the eyelet 24 is inserted into and engaged with the engagement pin 33 so that the front end edge of the waterproof sheet 11 is engaged. It is configured so that it can be fixed in the left and right groove 12.

  On the upper surface 30 ′ of the water stop engaging horizontal bar 30, the presser horizontal bar 27 b of the front fixing bar 27 is fixed by pressure (FIG. 8C). The presser horizontal bar 27b connects the lower ends of the presser columns 27a and 27a of the front fixing bar 27. On the lower surface of the presser lateral flange 27b, in a state where it is crimped onto the water retaining engagement lateral flange 30 in the left and right direction concave groove 12, it has a triangular cross section that is crimped to the elastic body 32 in the concave groove 31. The water stopping protrusions 35 are linearly projected over the entire width in the left-right direction, and a plurality of water stopping protrusions 35 communicate with the screw holes 33 a of the engaging pins 33 on the front side of the water stopping protrusions 35. Through-holes 36 are provided (see FIG. 11C).

  Accordingly, as shown in FIG. 8 (b), the front edge 15b of the waterproof sheet 15 is bent forward in the horizontal direction and the eyelet 24 is engaged with the engagement pin 33, so Is fitted into the left and right groove 12 and is crimped onto the water stop engaging horizontal bar 30, and a bolt B is inserted through the through hole 36 and screwed into the engaging pin 33. In a state where the entire horizontal direction of the front end edge 15b of the waterproof sheet 15 is sandwiched, the water stopping protrusion 35 is pressed against the elastic body 32, so that the water stopping state is extended over the entire horizontal direction of the front end edge 15b (see FIG. 8 (c)), and in this state, it is configured so that it can be pressure-bonded and fixed onto the waterstop engaging horizontal bar 30 (see FIGS. 11 (c) and 12). At the same time, the front end edge 15b of the waterproof sheet 15 is held in a water-stopped state by pressing the upper surface 30 'of the waterstop engaging horizontal bar 30 and the lower surface of the presser horizontal bar 27b.

  As shown in FIG. 4, the front fixing bar 27 is formed by fitting the lower end portions of the presser columns 27a and 27a to the fitting recesses 50 and 50 formed at both ends of the presser lateral rod 27b. By fixing, the presser pillars 27a and 27a can be erected at the both end portions, and the whole can be formed in a concave shape. The front fixing bar 27 can be fitted and fixed in the left and right concave grooves 12 and the spaces S1 and S1 after being assembled in this concave shape.

  As shown in FIG. 4, in the passage-side vertical water blocking surface 14, a reinforcing column 45 is erected and fixed at a central portion between the left and right both-end established columns 25 and 25, and the upper ends of the left and right both-end established columns 25 and 25. Reinforcing reeds 46 are fitted and fixed to the upper ends of the reinforcing columns 45. The reinforcing column 45 has a cylindrical shape, and is erected and fixed by fitting a lower end to a protruding portion 47 protruding from the central portion of the horizontal groove 12 (FIG. 9B). Both end portions 46 ′ of the reinforcing horizontal bar 46 are placed on the U-shaped projecting pieces 25a and 25a at the upper end portions of the left and right both end establishment columns 25 and 25 (FIG. 9 (a)), By fitting the upper end protrusion 45a of the reinforcing column 45 into the provided recess 46a, it is fixed on the left and right end establishment columns 25, 25 and the reinforcing column 45 (FIGS. 9A and 9B). .

  A column storage box 37 is provided on the rear wall plate 5 c of the wall plate 5 on the rear side of the waterproof sheet storage box 13. In the column storage box 37, the reinforcing column 45, the reinforcing horizontal rod 46, the pressing columns 27a (two) of the front fixing bar 27, and the pressing horizontal rod 27b of the front fixing bar 27 are stored.

  Further, the upper surface opening of the left and right groove 12 is normally closed by a lid 47, and the lid 47 is flush with the ground surface 3 'of the passage 3, so that it does not hinder walking. It is configured as follows.

  The water stop device at the underground entrance of the present invention is configured as described above. Next, the function of this device will be described.

  Normally, as shown in FIG. 1, the left and right grooves 12 are covered with the lid 47, and the water stopping engagement rods 18 and 18 on the left and right gate wall plates 5a and 5b are entirely covered. The plurality of presser barbs 22 are fixed by bolts B, and the engaging pins 17a and 21 and the elastic body 20 of the waterstop engaging barks 18 and 18 as well as the inside of the left and right concave groove 12 are the presser foot. It is in the state (the state of FIG. 7A and FIG. 8A) covered with the flange 22.

  In order to configure the water stop device at the underground entrance from such a state, first, the column storage box 37 is opened, and from the inside, the two presser columns 27a and 27a of the front fixing bar 27, the presser horizontal rod 27b, and the reinforcing column 45 4 and take out the reinforcing horizontal flange 46, and remove the lid 47, as shown in FIG. 4, and fix the reinforcing column 45 upright in the center of the left and right groove 12, and the upper end of the reinforcing column 45 and the left and right The reinforcing reed 46 is fixed to the upper ends of the both ends establishment pillars 25 and 25 to constitute the skeleton of the passage-side vertical water blocking surface 14. Note that the presser pillars 27a and 27a are fixed to both ends of the presser horizontal bar 27b to form a concave front fixing bar 27.

  Further, as shown in FIG. 4, the bolt B on each presser bar 22 is removed, and all of the plurality of presser bars 22 are once removed from the water stop engaging bar 18. Further, the inner surface closing lids 16b, 16b of the left and right engagement rods 16 'are opened to expose all the engagement pins 17a.

  Next, the reinforcing net storage box 10 is opened, the reinforcing net 11 is taken out from the inside, and is pulled forward to horizontally extend the entire area of the ground opening 2 between the left and right wall plates 5 and 5 (opening side horizontal water blocking surface 14 '). And is further pulled forward, changed direction vertically downward from the reinforcing ledge 46 and pulled downward, and the mesh of the front edge 11b of the pin 43 ′ ( 4 places) (refer FIG. 5, FIG.8 (b)). Thereafter, the meshes of the left and right side edges 11c, 11c of the reinforcing net 11 drawn horizontally on the ground opening 2 are respectively engaged with the plurality of engaging pins 17a of the engaging rods 16 ', 16'. In the present embodiment, the meshes of the left and right side edges 11c of the reinforcing net 11 are engaged with the engaging pins 17a at six places in the left and right direction (12 places in total). As a result, as shown in FIG. 5, the reinforcing net could be stretched between the opening side horizontal water blocking surface 14 ′ and the passage side vertical water blocking surface 14 between the left and right wall plates 5, 5. In the vertical water blocking surface 14, the reinforcing net 11 is stretched between the reinforcing horizontal bar 46 and the pin 43 '.

  Next, the waterproof sheet storage box 13 is opened, the waterproof sheet 15 is taken out from the inside, and is drawn forward on the upper surface side of the reinforcement net 11 to cover the left and right water-stopping engagement rods 18 and 18. The opening side horizontal water blocking surface 14 ′ on the ground opening 2 is closed, and further drawn forward, turned vertically downward from the reinforcing ledge 46, and drawn downward to widen the front end. The front side of the left and right both ends establishment pillars 25, 25 is covered by the portion 15d, and the front edge 15b is slightly bent horizontally forward in the left and right direction concave groove 12, so that the eyelets 24 (four places) of the front edge 15b are formed. The four engaging pins 33 are engaged with each other (see FIGS. 6 and 8B).

  Thereafter, the plurality of eyelets 24 on the left and right side edges 15c, 15c of the waterproof sheet 15 drawn out horizontally are inserted and engaged with the engagement pins 21 at the corresponding positions of the water stopping engagement rods 18, 18. . In the present embodiment, the eyelets 24 of the waterproof sheet 15 are engaged with 11 engaging pins 21 in each of the left and right directions (22 places in total) (FIGS. 7B and 7C).

  Thereafter, all the left and right presser foot 22 are crimped and fixed on the left and right water-stopping engagement rods 18, 18. That is, the plurality of presser barbs 22 are respectively crimped onto the water stop engaging bar 18, and the right and left side edges 15 c of the waterproof sheet 15 are sandwiched between the water stop ridge 23 and the elastic body 20. In the state shown in FIG. 8C, the bolt B is screwed into the screw hole 21a of the engagement pin 21 from the through hole 29, and thereby the presser foot 22 is sandwiched between the waterproof sheet 15 and the water stop engagement member. Crimp and fix to the joint 18. With this configuration, the right and left side edges 15c of the waterproof sheet 15 covering the opening-side horizontal water-stopping surface 14 'can be in a water-stopping state over the entire area in the front-rear direction. Further, when the presser foot 22 is fixed on the water stop engaging bar 18, the lower surface of the presser bar 22 is close to the upper end position of the engaging pin 17a as shown in FIG. The net 11 is fixed and secured.

  Next, the front fixing bar 27 is fitted and inserted into the spaces S1 and S1 of the vertical concave grooves 26 and 26 in front of the left and right concave grooves 12 and the left and right both end establishment columns 25 and 25. First, the presser lateral flange 27b of the front fixing bar 27 is fitted into the left and right groove 12. That is, as shown in FIG. 8 (c), the presser horizontal bar 27 b is pressure-bonded onto the waterstop engaging horizontal bar 30, and the waterproof sheet is interposed between the waterstop protrusion 35 and the elastic body 32. 8 (c) with the front end edge 15b of 15 being sandwiched, the bolt B is screwed into the screw hole 33a of the engagement pin 33 from the through hole 36, thereby sandwiching the front end edge 15b of the waterproof sheet 15. Then, the presser foot spatula 27b is pressure-bonded onto the water stop engaging spatula 30. With this configuration, the front end edge 15b of the waterproof sheet 15 covering the passage-side vertical waterstop surface 14 can be in a waterstop state over the entire region in the left-right direction of the left-right groove 12.

  Further, in the fitting and fixing state of the front fixing bar 27, the left and right presser columns 27a and 27a of the front fixing bar 27 are inserted and fitted into the spaces S1 and S1, respectively. As shown in FIG. The presser columns 27a and 27a are pressure-bonded to the front surfaces of the left and right both-end established columns 25 and 25, and the left and right side edges 15c and 15c of the waterproof sheet 15 are sandwiched between the water stopping protrusion 42 and the elastic body 41. It is in a state. In this state, the bolts B are screwed into the screw holes 22a (FIG. 9 (a)) on the front surface of the presser bar 22 at the front end from the front of the upper ends of the presser columns 27a and 27a, whereby the presser columns 27a and 27a are inserted. Each of the left and right ends established columns 25 and 25 is pressure-bonded (FIG. 5), whereby the left and right ends established columns 25 and 25 are sandwiched between the left and right edges 15c and 15c on the vertical surface of the waterproof sheet 15, respectively. It can be crimped and fixed to. With this configuration, it is possible to make the water stop state over the entire vertical direction of the left and right side edges 15c of the waterproof sheet 15 covering the passage-side vertical water stop surface 14. The waterproof sheet 15 is in a state of being stretched between the reinforcing horizontal surface 46, the presser columns 27 a and 27 a, and the presser horizontal surface 27 b on the vertical water blocking surface 14.

  With the above configuration, as shown in FIG. 6, between the left and right end established columns 25, 25 forming the entire opening side horizontal water blocking surface 14 ′ between the left and right gate column wall plates 5 a, 5 b at the underground entrance and the entrance passage 3. The entire passage-side vertical water blocking surface 14 can be covered with a single waterproof sheet 15 in a water blocking state.

  In this covered state, as shown by a one-dot chain line in FIG. 6, the entire side edge of the waterproof sheet 15, that is, the rear edge 15 a of the waterproof sheet 15 is fixed in a water-stopped state in the waterproof sheet storage box 10. The left and right side edges 15c, 15c of the waterproof sheet 15 are entirely in the front-rear direction in the left and right lines P2, P2 by the presser foot 22 of the left and right water-stop engaging portions 16, 16. Further, the right and left side edges 15c and 15c of the waterproof sheet 15 are provided at the left and right lines P3 and P3 by the pressing columns 27a and 27a in the vertical portion between the left and right end establishment columns 25 and 25, respectively. Further, the front end edge 15b of the waterproof sheet 15 is stopped at the line P4 portion over the entire region in the left-right direction by the presser lateral lever 27b. The entire circumference of the peripheral portion 15 is a water stopping state without interruption across the line P1, P2, P3, P4.

  Therefore, even if a flood or the like occurs and the water level near the underground entrance 1 rises, the waterproof sheet 15 surely allows the underground water to flow into the underground on the passage-side vertical water blocking surface 14 in front of the stairs 4 to the underground premises. Can be prevented.

  Even if the water level rises and the water level exceeds the height of the wall plate 5 around the ground opening 2 of the underground entrance 1, the entire opening at the upper end between the wall plates 5 is not covered by the waterproof sheet. 15 is covered horizontally in a water-stopped state, so that water flowing underground can be reliably prevented.

  Further, since the reinforcement net 11 is stretched over substantially the entire area inside the waterproof sheet 15, the water pressure acting on the waterproof sheet 15 on the opening side horizontal water blocking surface 14 ′ is transferred by the inner reinforcement net 11. It can support and can exhibit high waterproofness.

  Further, since the reinforcement net 11 is stretched inside the waterproof sheet 15 also on the passage-side vertical water blocking surface 14, the water pressure acting on the waterproof sheet 15 on the passage-side vertical water blocking surface 14 side is increased. 11 and can exhibit high waterproofness.

  When the waterproof sheet storage box 13 and the reinforcement net storage box 10 are not used, the waterproof sheet 15 and the reinforcement net 11 are brought to the site, and the rear edge 15a of the waterproof sheet 15 is connected to the rear wall of the rear end portion of the wall plate 5. On the upper surface 5 ′ of the plate 5 c, the water stop state is fixed over the entire region in the left-right direction by the same structure as the water stop engagement rod 18 and the presser foot 22, and the engagement pin 17 a is attached to the back wall plate 5 c. And the mesh of the rear end edge 11a of the reinforcing net 11 may be engaged with the engaging pin 17a.

  FIG. 14 shows another embodiment of the present invention, in which the water stop engaging portion 16 shown in FIG. 7 is provided on the upper surface 5 ′ of the wall plate 5. In FIG. 14, the same or corresponding parts as those in the above embodiment are designated by the same reference numerals and their description is omitted. As shown in FIG. 1, when the small column 6 and the fall prevention rod 7 are provided on the upper surface 5 ′, the water stop engaging portion 16 is provided on the opposing surface 5 ″ of the wall plate 5 as shown in FIG. If there is nothing on the upper surface of the wall plate 5 at the basement entrance as shown in FIG. 13, the water-stopping engagement rod 18 and the engagement pin 17a are connected to the upper surface 5 as shown in FIG. The presser bar 22 is provided on the engagement bar 18 and can be configured to be crimped by the bolt B with the prevention sheet 15 being sandwiched between them. The same effect can be obtained.

  In the structure shown in FIG. 15, a reinforcing wire rope (wire) 51 is further stretched on the inner side (lower side) of the reinforcing net 11 in the left-right direction between the wall plates 5 and 5 at predetermined intervals in the front-rear direction. It is a thing. The wire rope 51 is made of, for example, a stainless steel wire having a diameter of about 16 mm. In the opening side horizontal water blocking surface 14 ′, as shown in FIG. 15A, a wire engagement ring 52 is provided at a position below the engagement pin 17a in the engagement rod 16 ′, and the wire 51 By engaging engagement rings 51 ′ provided at both ends of the wire engagement ring 52, the engagement rings 51 ′ are stretched between the wall plates 5 and 5.

  In the passage-side vertical water blocking surface 14, as shown in FIG. 15 (b), a wire engaging ring 52 is provided on the rear surface side of the reinforcing net 11 on the opposite side surfaces of the left and right end establishment columns 25, 25, and the wire Engagement rings 51 ′ provided at both ends of 51 are engaged with the wire engagement ring 52 so as to be stretched between the left and right both end establishment columns 25, 25.

  As shown in FIG. 13, the four wires 51 are stretched at substantially equal intervals in the front-rear direction on the opening-side horizontal water blocking surface 14 ′, and the passage-side vertical water blocking surface 14 is The two wires 51 are stretched at substantially equal intervals in the direction.

  If comprised in this way, even if a big water pressure acts on the waterproof sheet 15 by flooding in the said opening side horizontal water stop surface 14 'and the channel | path side vertical water stop surface 14 by flood etc., the inner side (lower side) of the said waterproof sheet 15 will be described. The reinforcing net 11 and the inner (lower) wire 51 can support the waterproof sheet 15 even if the water level on the waterproof sheet 15 rises due to a large-scale disaster or the like. Damage to the reinforcing net 11 due to water pressure is effectively prevented by the wire 51, and a safer water stop device can be realized.

  As described above, according to the present invention, a large-scale flood or the like that reaches a water level exceeding the height of the wall plate 5 of the ground opening 2 of the underground entrance 1 like a subway entrance installed on the ground. Even if it occurs, water flowing into the underground premises can be surely prevented.

  That is, since not only the vertical plane between the entrance passages 3 of the underground entrance but also the horizontal plane between the left and right wall plates 5 can be covered with the waterproof sheet 15 in a water-stopped state, the height of the wall plate 5 of the underground entrance 1 can be increased. Even if a large-scale flood with a higher water level occurs, it is possible to reliably prevent water from flowing into the underground premises.

  Further, since the reinforcing net 11 is located on the inner side surface (lower surface side) of the waterproof sheet 15, even if the waterproof net 15 is covered with the waterproof sheet 15 that horizontally covers the left and right wall plates 5, the inner reinforcing net 11 Water pressure can be reliably received and high waterproofness can be exhibited.

  In addition, the waterproof sheet 15 or the reinforcing net 11 can be stored and disposed in advance in the waterproof sheet storage box 13 or the reinforcing net storage box 10 at a predetermined position of the underground entrance 1, so that it can be quickly moved at the underground entrance 1 even in an emergency. A water stop device can be configured.

  In addition, the water can be reliably stopped by clamping the side edge of the waterproof sheet 15 by pressure bonding between the water stop member and the presser member.

  In addition, since the reinforcing horizontal bar 46 is located at the boundary between the horizontal extending surface between the wall plates 5 of the waterproof sheet 15 and the vertical extending surface between the left and right both ends establishment pillars 25, 25, the waterproof sheet 15 The horizontal and vertical stretched surfaces can be reinforced, and high waterproofness can be exhibited.

  Further, by stretching a wire inside the reinforcing net, it is possible to receive a larger water pressure and to exhibit extremely high waterproofness.

  The water stop device for an underground entrance of the present invention can be widely applied at the entrance of a passage communicating with the underground such as a subway entrance and an underground passage entrance.

1 Underground entrance 2 Ground opening 3 Entrance passage 3 'Ground surface 4 Stairs (underground passage)
5 Wall plates 5a, 5b Left and right gate column wall plates 5c Back wall plate 5 "Opposing surface 10 Reinforcement net storage box 11 Reinforcement net 11a Rear end edge 11b Front end edge 11c Left right side edge 12 Left and right direction groove 13 Waterproof sheet storage box 15 Waterproof sheet 15a Rear edge 15b Front edge 15c, 15c Left right edge 17a, 43 Engagement pin 18 Water stop engagement rod (water stop member)
20, 32, 41 Elastic body 22 Presser foot (presser member)
23, 35, 42 Ribs 25, 25 Established columns on both the left and right sides (water-stop member)
27a Presser column (presser member)
27b Presser foot (presser member)
30 Water stop engagement recumbent (water stop member)
43 'Pin 46 Reinforcement recumbent 51 Wire (wire rope)
B bolt (fastening means)
G Ground R Underground passage Q Rear end position of wallboard

Claims (7)

An underground passage is formed from the ground opening toward the basement, and a wall plate having a predetermined height is arranged in a substantially U shape around the ground opening, and the entrance toward the underground passage is formed by opposing left and right wall plates. A water stop device at an underground entrance where a passage is formed,
Water stop engagement rods extending from the rear end position of the wall plate to the inlet passage are provided in the front-rear direction on both sides of the left and right wall plates, and the inlets are provided at the front ends of the both water stop engagement rods. Established left and right pillars up to the ground surface of the passage,
A left and right groove is formed between the left and right wall plates on the ground surface corresponding to the installation positions of the left and right both ends establishment pillars
A waterproof sheet having a rear edge fixed to the rear end portion of the wall plate in a water-stopped state is horizontally stretched on the left and right water-stopping engagement rods, and the waterproof sheet is formed on the front of the left and right both-end establishment pillars. A sheet is vertically stretched, and the front edge of the prevention sheet is configured to be locked in the left and right groove,
Holding the left and right side edges in the horizontal plane of the waterproof sheet in a water-stopped state by crimping and fixing a presser foot to the right and left side edges of the waterproof sheet located between the left and right water-stop engaging hooks,
Holding the right and left side edges on the vertical surface of the prevention sheet in a water-stopped state by pressing and fixing the pressing pillars to the right and left side edges of the waterproof sheet located in front of the left and right both ends establishment pillars,
The underground entrance is characterized in that the front edge of the waterproof sheet is held in a water-stopped state by crimping a presser foot to the front edge of the waterproof sheet positioned in the left and right groove. Water stop device. Engaging pins for reinforcing nets are provided in the left and right wall plates and the left and right concave grooves,
On the inner surface side of the stretched waterproof sheet, the left and right edges of the reinforcement net are locked to the engagement pins to horizontally stretch the reinforcement net between the left and right wall plates, and establish both left and right ends. The reinforcing net is vertically stretched between columns, and the front end edge of the reinforcing net is configured to be able to be locked to the engaging pin in the left and right concave groove. The water stop device for an underground entrance according to claim 1. A tarpaulin storage portion is provided in which the tarpaulin is folded and stored in a state where the rear edge is fixed in a water-stopped state at the rear end portion of the wall plate,
The waterproof sheet is configured to be stretchable between the left and right water-stop engaging ribs and between the left and right both-end establishment pillars by being drawn out from the waterproof sheet storage portion to the inlet passage side. The water stop device at the underground entrance according to claim 1 or 2. A reinforcing net storage unit is installed in which the reinforcing net is folded and stored in a state where the rear end edge is fixed to the rear end of the wall plate,
The reinforcing net is constructed so as to be stretched between the left and right wall plates and between the left and right both ends establishment pillars by being drawn out from the reinforcing net storage portion to the entrance passage side. underground inlet water stop device according to 2. The waterproof structure of the right and left side edges and the front edge of the waterproof sheet is a water stop structure including an elastic body that is located on one side of the waterproof sheet and linearly positioned along the left and right edges or the front edge of the waterproof sheet. Constituted by a member and a pressing member provided with a protrusion located on the other side of the waterproof sheet and capable of being crimped to the elastic body,
In a state where the left and right side edges or the front edge of the waterproof sheet is sandwiched between the elastic body of the water stop member and the protrusions of the press member, the water stop member and the press member are pressure-bonded by fastening means. The water stop device for an underground entrance according to any one of claims 1 to 4, wherein the water stop device is an underground water inlet.   The water stop device for an underground entrance according to any one of claims 1 to 5, wherein a reinforcing reed is fixed between upper end portions of the left and right both end established columns.   The underground entrance according to any one of claims 2 to 6, wherein a plurality of wires in the front-rear direction between the left and right wall plates are stretched in the left-right direction inside the reinforcing net. Water stop device.

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