Water shutoff device

Abstract

To provide a water-stopping device that ensures reliable water-stopping while being easy to install. [Solution] A water-stopping device 1 that brings the lower edge 2b and left and right edges 2c, 2d of a water-stopping sheet 2 in an upright position into close contact with the floor surface F and a pair of upright surfaces E that rise from the floor surface F and face each other, comprising: a tension rod 6 positioned to brace against the pair of upright surfaces E; a pair of side pressers 7 provided at both ends of the tension rod 6 for pressing the left and right edges 2c, 2d of the water-stopping sheet 2 against the pair of upright surfaces E; a pressing bar 8 extending in the longitudinal direction of the tension rod 6 below the tension rod 6 for pressing the lower edge 2b of the water-stopping sheet 2 against the floor surface F; and a biasing means 9 for biasing the tension rod 6 and the pressing bar 8 in a direction that separates them from each other.

Description

Technical Field

[0001] The present invention is installed to form a water-stop barrier at a location where it is intended to prevent flooding, such as at the entrance of a building. It is installed during a period when flood countermeasures are required (for example, from before the influence of a flood begins until the flood subsides), and can be removed when flood countermeasures are not necessary. The present invention relates to a water-stop device.

Background Art

[0002] As described in Patent Document 1, a water-stop device is conventionally known in which the entrance of a building is appropriately covered with a water-stop sheet. In this water-stop device, both the left and right sides of the water-stop sheet are detachably attached to the vertical frames on the left and right of the entrance, and the lower edge of the water-stop sheet is pressed against the ground.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Patent Document 7

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the conventional water-stopping device described above has the problem that installation is not easy because it requires burying anchors in the ground into which bolts for tightening and fixing the lower frame member, which presses the lower edge of the water-stopping sheet against the ground, are screwed. This problem also occurs when the water-stopping sheet itself is directly tightened and fixed with bolts instead of the lower frame member (for example, Patent Document 2).

[0005] Furthermore, there is a method of placing a heavy object (pressing member) on the lower edge of the water-stopping sheet and pressing it down to the floor surface to eliminate the need for the above-mentioned burial (see, for example, Patent Documents 3 to 7). However, with this method, if the mass of the heavy object is large, it becomes difficult to transport, and if the mass of the heavy object is small, there is a concern that the heavy object may move due to the action of the water dammed by the water-stopping device, resulting in flooding. Moreover, in experiments conducted by the present inventors, it was confirmed that even when a heavy object such as a flat bar exemplified in Patent Document 4 is placed on the water-stopping sheet, the pressure of the heavy object alone is not sufficient to make the water-stopping sheet adhere sufficiently to the floor surface, and water may pass between the water-stopping sheet and the floor surface.

[0006] The present invention has been made with the above-mentioned matters in mind, and its purpose is to provide a water-stopping device that can be easily installed while ensuring reliable water-stopping. [Means for solving the problem]

[0007] To achieve the above objective, the water-stopping device according to the present invention is a water-stopping device that brings the lower edge and both left and right edges of an upright water-stopping sheet into close contact with the floor surface and a pair of upright surfaces that rise from the floor surface and face each other, comprising: a tension rod positioned to brace against the pair of upright surfaces; a pair of side pressers provided at both ends of the tension rod for pressing both left and right edges of the water-stopping sheet against the pair of upright surfaces; a pressing bar extending in the longitudinal direction of the tension rod below the tension rod for pressing the lower edge of the water-stopping sheet against the floor surface; and a biasing means for biasing the tension rod and the pressing bar in a direction that separates them from each other (Claim 1).

[0008] In the above-described water-stopping device, the retaining bar has an outer frame and an inner frame that are slidable relative to each other in the longitudinal direction of the retaining bar, and the outer frame and the inner frame may each have portions that extend in the longitudinal direction of the retaining bar and come into contact with the lower edge of the water-stopping sheet (Claim 2).

[0009] In the above-described water-stopping device, the biasing means may be movable in the longitudinal direction of the tension rod (Claim 3). [Effects of the Invention]

[0010] The present invention provides a water-stopping device that is easy to install while ensuring reliable water-stopping.

[0011] In other words, in the water-stopping device according to each claim of the present application, the left and right edges of the water-stopping sheet can be pressed against the pair of upright surfaces by side pressers provided at both ends of a bracing rod that is positioned to brace against the pair of upright surfaces. Furthermore, while the bracing rod is held in place and not moved, the lower edge of the water-stopping sheet can be pressed against the floor surface by a pressing bar located below the bracing rod and biased downward by a biasing means. By pressing the upright water-stopping sheet against the floor surface and the pair of upright surfaces in this way, reliable water-stopping can be ensured. Moreover, since there is no need to use heavy components that would make transportation difficult, the installation of the water-stopping device can be made easier.

[0012] In the water-stopping device according to claim 2, the pressing bar, which is formed to create an overlapping portion between the outer frame and the inner frame, can apply pressure to the lower edge of the water-stopping sheet from one end to the other without interruption in its longitudinal direction, thereby further ensuring reliable water-stopping.

[0013] In the water stop device of the invention according to claim 3, after adjusting the lengths of the tension bars and the pressing bars according to the distance between the pair of vertical surfaces, if the biasing means is moved in the longitudinal direction of the tension bars, the pressing bar can be pressed against the floor surface at a position effective for water stop at the lower edge of the water stop sheet, which contributes to further ensuring water stop and facilitating installation.

Brief Description of the Drawings

[0014] [Figure 1] It is a perspective view showing the installation state of the water stop device according to an embodiment of the present invention. [Figure 2] (A) is a front view showing the installation state of the water stop device, and (B) is an explanatory view showing the change of the sealing material provided on the water stop sheet of the water stop device. [Figure 3] It is a perspective view showing the water stop sheet and the fixing device of the water stop device. [Figure 4] (A) to (E) are a front view, a plan view, a left side view, a right side view, and a bottom view of the water stop sheet. [Figure 5] (A) to (E) are explanatory views showing the pretreatment process of the water stop sheet. [Figure 6] It is an exploded perspective view of the fixing device. [Figure 7] (A) and (B) are a perspective view showing the tension bar, the side presser, and the pressing bar of the fixing device and an explanatory view showing their connection method. [Figure 8] (A) to (C) are an exploded perspective view, a perspective view, and a side view of the pressing bar. [Figure 9] (A) and (B) are front views showing the state where the pressing bar is contracted and the state where it is extended, and (C) to (E) are end views of the cut portion along the C-C line, the D-D line, and the E-E line in (B). [Figure 10] (A) is a perspective view showing the installation state of the biasing means, (B) and (C) are an exploded perspective view and a longitudinal sectional view of the biasing means, and (D) and (E) are longitudinal sectional views showing the use state where the biasing means is contracted and the use state where it is extended. [Figure 11](A) to (G) are perspective views showing the installation process of the water stop device. [Figure 12] (A) to (C) are explanatory diagrams (perspective views) showing how to fold the water stop sheet. [Figure 13] (A) is a front view showing each component member of the water stop sheet, and (B) and (C) are explanatory diagrams (perspective views) showing the processing steps of the water stop sheet. [Figure 14] (A) and (B) show the state where an extension device is installed above the water stop device [Figure 15] (A) and (B) are perspective views showing the contracted state and the extended state of a modified example of the biasing means, and (C) and (D) are exploded perspective views of the modified example of the biasing means as viewed from the upper diagonal side and the lower diagonal side. That is, they are perspective views and partial enlarged front views.

Embodiments for Carrying out the Invention

[0015] <满 Embodiments of the present invention will be described below.

[0016] As shown in FIGS. 1 and 2(A) and used by installation, the water stop device 1 includes a water stop sheet 2 and a fixing device 3 as shown in FIG. 3. As also shown in FIGS. 11(A) to (C), for example, a door D (an example of an opening / closing body) provided at the entrance of a house (an example of the entrance of a building), a pair of upright surfaces E that face each other and constitute the entrance where this door D is installed, and a floor surface F connected to these. By installing the fixing device 3 so that the water stop sheet 2 is closely attached, water is prevented from passing through the gaps between the door D (lower part), the upright surface E (lower part), and the floor surface F, and the gaps in the door D itself (the gap between the door frame and the door body held by the door frame), etc., that is, the parts where the water stop sheet 2 is closely attached, and a water stop barrier for blocking (not allowing to pass) the water flowing on the floor surface F is formed.

[0017] This water-stopping device 1 can prevent water from passing from one side of the door D where the water-stopping device 1 is installed to the other side (from the front to the back in Figure 1), and also from the other side to the one side (from the back to the front in Figure 1). Therefore, although the water-stopping device 1 is installed on the indoor side of the door D in this example, it is not limited to this and can also be installed on the outdoor side of the door D. Furthermore, since the water-stopping device 1 does not have a structure that interferes with the opposite side of the door D, if there are two water-stopping devices 1, they can be installed on both the indoor and outdoor sides of the door D.

[0018] As shown in Figure 13(A), the waterproof sheet 2 consists of a sheet member 2S that, when unfolded (before processing), is a horizontally elongated rectangular sheet, a reinforcing band 2H provided on the upper part of the sheet member 2S, a plurality of (five in the illustrated example) hook-and-loop fastener pieces 2M, connecting pieces 2R connected to at least two adjacent hook-and-loop fastener pieces 2M, a sealing material 4 fixed to the back side and the front side of the lower edge and left edge of the sheet member 2S, respectively, and an anti-slip material 5. The sheet member 2S has waterproof (waterproof) and flexible properties throughout its entire surface, and has durability (strength) that prevents damage from the pressure received from the water dammed by the waterproof device 1. It does not need to be elastic, but it may have appropriate elasticity. Appropriate materials such as rubber, resin, and waterproof fabric can be selected for its material, and it may be constructed by laminating and integrating multiple layers, for example.

[0019] As shown in Figure 3, the waterproof sheet 2 is used in an upright state with a rectangular main body portion 2a, which makes up the majority of the waterproof sheet 2 in a front view, and a lower edge portion 2b and left and right edges portion 2c and 2d extending forward from below it. In this example, this upright state is achieved by folding the sheet while attaching the other components that make up the waterproof sheet 2 to the unfolded sheet member 2S to complete the waterproof sheet 2.

[0020] To elaborate, first, as shown in Figure 13(B), the upper part 2Sa of the sheet member 2S in its unfolded state (initial state) is folded back, and the reinforcing strip 2H is sandwiched in the folded portion. In this state, the reinforcing strip 2H is joined and integrated with the upper part 2Sa of the sheet member 2S to obtain a reinforcing sheet 2S1 (see Figure 13(C)). This joining and integration can be done, for example, by heat welding or bonding with an adhesive. The joining points can be, for example, the upper and lower edges of the reinforcing strip 2H. In addition, a region passing through the center of the reinforcing strip 2H in the vertical direction along its longitudinal direction may be added, or the entire surface of the reinforcing strip 2H may be joined.

[0021] Next, as shown in Figures 5(A) and (B), the reinforcing sheet 2S1 is folded inwards at predetermined distances from the left and bottom ends (preferably equal to or slightly greater than the width of the sealing material 4 and anti-slip material 5, for example, about 60 mm), and the base of the triangular portion formed at the intersection of the two (lower left side) is joined (for example, by heat welding or adhesive bonding), and the outer portion from the base is cut off (see Figures 5(C) to (E)). This yields the folded reinforcing sheet 2S2 shown in Figure 13(D).

[0022] Subsequently, as shown in Figure 13(D), the anti-slip material 5 is attached to the left edge 2c and the lower edge 2b of the folding reinforcement sheet 2S2 from the surface side (top) and the sealing material 4 is attached to the back side (bottom) from the surface side (bottom), respectively (for example, by fixing with double-sided tape or bonding with adhesive).

[0023] Furthermore, as shown in Figure 13(D), five hook-and-loop fastener pieces 2M are attached to the surface side (front side) of the upper part 2Sa of the folding reinforcement sheet 2S2 at appropriate intervals along the longitudinal direction of the upper part 2Sa, and overall positioned towards the left side of the upper part 2Sa (for example, by bonding with adhesive or fixing with double-sided tape). With these steps completed, the waterproof sheet 2 in the state shown in Figures 4(A) to (E) and Figure 12(A) is completed.

[0024] In the examples shown in Figures 13(B) and (C), the upper part 2Sa of the sheet member 2S is folded back, and the reinforcing band 2H is sandwiched in the folded portion to join and integrate the two. However, this is not the only option. For example, the upper part 2Sa of the sheet member 2S may not be folded back, and the reinforcing band 2H may be joined to the front or back side of the upper part 2Sa. Alternatively, the upper part 2Sa may be sandwiched between two folded reinforcing bands 2H to join them. In any case, the hook-and-loop fastener piece 2M should be joined to the front side of the upper part 2Sa or the reinforcing band 2H.

[0025] Then, when installing the waterproof sheet 2 in the state shown in Figure 12(A) at the entrance of a building as shown in Figures 1 and 2(A), it is raised to the upright position shown in Figure 3 as described above. At this time, the waterproof sheet 2 is cut according to the installation opening W, which is the distance between a pair of opposing upright surfaces E. In other words, the installation opening W usually differs depending on the building (entrance), and in this example, the waterproof sheet 2 is cut to a length corresponding to the installation opening W.

[0026] Specifically, as shown in Figure 12(A), the right side of the waterproof sheet 2 is cut so that the waterproof sheet 2 has a length equal to the installation opening W and the vertical width h of the main body 2a of the waterproof sheet 2 (the distance from the upper end of the waterproof sheet 2 to the lower end of the main body 2a). The vertical width h can be, for example, 300 mm. Then, a valley fold line L2 is set at a distance of the vertical width h from the cut right side L1 and this is valley-folded, and a mountain fold line L4 is set extending from the intersection of this valley fold line L2 and the lower side L3 of the main body 2a toward the upper end of the right side L1 and this is mountain-folded, so that the waterproof sheet 2 is folded as shown in Figures 12(B) and (C), resulting in the upright state of the waterproof sheet 2 shown in Figures 3 and 4(A) to (E), which corresponds to the installation opening W.

[0027] If the waterproof sheet 2 in the state shown in Figure 12(A) is manufactured in a factory or similar facility, then at the site where the waterproof sheet 2 is to be installed, only the cutting of the waterproof sheet 2 according to the installation opening W and the folding shown in Figures 12(A) to (C) will be required to obtain a waterproof sheet 2 that can be installed in an upright state. This reduces the amount of work required at the site and simplifies the installation of the waterproof sheet 2. However, this is not the only option. For example, with the waterproof sheet 2 in the state shown in Figure 12(A), the left edge portion 2c may be removed, and instead, a structure symmetrical to the portion from the valley fold line L2 to the right edge L1 may be provided on the left side of the main body portion 2a. If this newly provided portion is folded using the same procedure as shown in Figures 12(B) and (C), then the left half of the waterproof sheet 2 shown in Figure 3 will have a structure symmetrical to the right half, resulting in an upright waterproof sheet 2. This waterproof sheet 2 may also be used.

[0028] Furthermore, in the above example, as shown in Figure 12(A), a waterproof sheet 2 is prepared with the left side folded and the right side unfolded, and the right side of the waterproof sheet 2 is cut and folded according to the installation opening W. However, it is of course possible to reverse this left-right relationship.

[0029] The dimensions of the waterproof sheet 2 can be determined as appropriate. The horizontal length of the main body 2a can be approximately 2 to 8 times its vertical length. For example, if the main body 2a before cutting, as shown in Figure 12(A), is 400 mm vertically and 2150 mm horizontally, the maximum possible installation opening W will be 1750 mm.

[0030] Here, the lower surface of the lower edge 2b of the upright waterproof sheet 2 (the surface in contact with the floor surface F) and the outer surfaces of both left and right edges 2c and 2d (the surfaces in contact with the upright surface E) are key parts for forming the waterproof barrier, and it is particularly desirable to enhance their sealing properties. Therefore, in this example, a sealing material 4, such as a foamed sealing material of an appropriate width, is surface-bonded (joined) to these areas. Depending on the properties of the waterproof sheet 2, it may be possible to omit the sealing material 4.

[0031] The width of the sealant 4 is 50 mm, and the width of the lower edge 2b of the waterproof sheet 2 is 60 mm. The sealant 4 is slightly narrower than the lower edge 2b, but this is not the only option. For example, the sealant 4 may be made to have the same width as the lower edge 2b.

[0032] Furthermore, the lower surface of the lower edge 2b of the upright waterproof sheet 2 (the back surface of the surface in contact with the floor surface F) and the inner surfaces of both left and right edges 2c and 2d (the back surfaces of the surfaces in contact with the upright surface E) are parts that are pressed by the fixing device 3. Since it is preferable to enhance the anti-slip properties so that these parts can firmly receive this pressure, in this example, anti-slip material 5 is provided in these areas with an appropriate width. In this example, the tape-shaped anti-slip material 5 is fixed with double-sided tape or the like, but it is not limited to this, and for example, liquid anti-slip material may be applied. Note that the width of the anti-slip material 5 is smaller than the width of the sealing material 4, but it is not limited to this, and for example, the width of the anti-slip material 5 may be the same as the width of the sealing material 4.

[0033] As shown in Figures 6 and 7(A), the fixing device 3 comprises a tension rod 6 positioned to brace against a pair of upright surfaces E (see Figure 1, etc.), a pair of side pressers 7 provided at both ends of the tension rod 6 to press the left and right edges 2c and 2d (see Figure 5(B)) of the waterproofing sheet 2 against the pair of upright surfaces E, a pressing bar 8 extending in the longitudinal direction of the tension rod 6 below the tension rod 6 to press the lower edge 2b of the waterproofing sheet 2 against the floor surface F, and a biasing means 9 for biasing the tension rod 6 and the pressing bar 8 in a direction that separates them from each other.

[0034] The tension rod 6 is extendable and retractable as a whole, and its configuration is not particularly limited as long as it can provide the necessary tensioning force; for example, a known configuration can be adopted. Here, general tension rods include a spring type that compresses a spring in an internal spring mechanism and uses the resulting repulsive force as tensioning force, and a jack type that fixes the variable length of the tension rod by appropriate means and then rotates a grip that constitutes a jack mechanism provided on the tension rod to obtain tensioning force. Either method can be adopted for the tension rod 6, but it is preferable to use the jack type as it provides a greater tensioning force. The configuration of the tension rod 6 in this example, which combines a jack mechanism and a spring mechanism to employ both types, will be described below.

[0035] As shown in Figures 6 and 7(A), the tension rod 6 has a roughly cylindrical outer shaft 10, and a roughly cylindrical inner shaft 11 with a smaller diameter is housed inside the outer shaft 10 at one end (the right end in the drawing) so that it can be inserted and removed from the inner shaft 11. The outer shaft 10 and inner shaft 11 can be made of steel pipes, stainless steel pipes, synthetic resin pipes, etc., that are coated with synthetic resin.

[0036] Furthermore, a fixing bolt 12 is provided at one end of the outer shaft 10 for fixing the length of the tension rod 6 when the inner shaft 11 is pulled out from the outer shaft 10 and the tension rod 6 is extended to an arbitrary length. Preferably, when the fixing bolt 12 is tightened, its tip can be pressed firmly against the outer surface of the inner shaft 11, creating a recess on the outer surface of the inner shaft 11, and when tightened further, the tip of the fixing bolt 12 can engage with this recess, or when tightened further, the tip of the fixing bolt 12 can penetrate the inner shaft 11 and protrude inward, creating a penetrating state. By tightening the fixing bolt 12, the movement of the inner shaft 11 in the insertion / removal direction relative to the outer shaft 10 can be restricted, and the length of the tension rod 6 can be fixed.

[0037] In the example shown in Figures 6 and 7(A), an expansion cylinder 13, through which the inner shaft 11 can be inserted and removed, is fixed to one end of the outer shaft 10 (the right end in the drawing) by joining or the like, and a fixing bolt 12 is screw-connected to a through-threaded hole (not shown) formed in the expansion cylinder 13, thereby indirectly providing the fixing bolt 12 to one end of the outer shaft 10 via the expansion cylinder 13. However, the method is not limited to this, and the fixing bolt 12 may be directly provided by forming the through-threaded hole on one end of the outer shaft 10 without providing the expansion cylinder 13 as described above.

[0038] As shown in Figure 7(A), at the other end of the outer shaft 10 (the left end in the drawing), a receiving portion 14, which is made of a bottomed cylindrical member, is fixedly attached to the inside by joining or the like, while a cap 15 is fitted to the outside so as to be movable in the insertion and removal direction. Between the receiving portion 14 and the cap 15, a biasing member (for example, a spring) 16 is placed to bias the cap 15 away from the receiving portion 14. The biasing member 16 is inserted into the inside of the outer shaft 10 from the other end, and the receiving portion 14 prevents the biasing member 16 from moving to one end of the outer shaft 10. Furthermore, in its natural state, the biasing member 16 protrudes outward from the end of the other end of the outer shaft 10 and is configured to contact the cap 15. Therefore, the cap 15 is biased by the biasing member 16 to come out from the other end of the outer shaft 10. Furthermore, it is preferable to provide a mechanism for holding the cap 15 in place so that it does not fall off the other end of the outer shaft 10, while allowing the cap 15 to move in the insertion and removal direction described above.

[0039] As shown in Figure 7(A), a jack mechanism 17 is provided at the other end (right end in the drawing) of the inner shaft 11, one end (left end in the drawing) of which is inserted into the outer shaft 10. This jack mechanism 17 includes a male threaded cylinder 18 fixed to the other end of the inner shaft 11 by joining or the like, a grip 19 having a female thread that is screw-connected to the male thread of the male threaded cylinder 18, and a cap 20 that is rotatably connected to the tip of the grip 19 around its axis and configured not to move in the axial direction. With this jack mechanism 17, the cap 20 can be moved back and forth in the axial direction of the support rod 6 by rotating the grip 19 around its axis.

[0040] The side retainer 7 only needs to be capable of achieving watertight sealing by receiving the tensioning force from the tension rod 6 and pressing the left and right edges 2c and 2d of the upright watertight sheet 2 against the upright surface E. In this example, as shown in Figures 6 and 7(A), the side retainer 7 is formed such that the vertically elongated rectangular pressing surface 21 facing outwards (away from the tension rod 6) is flat. A cushion sheet made of, for example, a rubber-like elastic material may be attached to this pressing surface 21 to increase frictional resistance and prevent damage to the object being pressed (watertight sheet 2 or upright surface E). The side retainer 7 can also be made of a metal such as steel or stainless steel, in addition to a synthetic resin such as ABS resin.

[0041] In this example, when the water-stopping device 1 is in use as shown in Figures 1 and 2, the tension rod 6 is pivotably connected to the side retainer 7 so that when the tension rod 6 bends upward due to the biasing force it receives from the biasing means 9, the bending force is converted into a tensioning force for the tension rod 6. Specifically, as shown in Figures 6 and 7(A), the pivoting joints 22 provided on the caps 15 and 20 at both ends of the tension rod 6 are pivotably connected to the joint receivers 23 formed on the inside of the side retainer 7 (the side facing the tension rod 6).

[0042] More specifically, the tip of the oscillating joint 22 is a plate-like structure divided into left and right forks, and a pair of triangular plate sections 24 are provided at a position on the extension of the caps 15 and 20, with a pair of curved plate sections 25 arranged in a row above them. On the other hand, the joint receiver 23 has a projection 26 that protrudes inward (towards the support rod 6 side) in a mountain shape, and curved grooves 27 and inclined grooves 28 are provided on both sides of it in that order from the top. The curved plate section 25 is a part of a circular disc (shaped enclosed by an arc and a chord), and the curved groove 27 constitutes a cam surface on which the curved plate section 25 can slide.

[0043] Both 22 and 23 can be connected by fastening fasteners (in this example, a grooved hinge pin 29 and an E-ring 30 that engages with an annular groove formed on the tip side of the pin 29) through through holes 24a provided on the base side of a pair of triangular plate portions 24 of the oscillating joint 22 and through holes 26a, which are elongated holes provided in the projection 26 of the joint receiver 23 (see Figure 7(B)). At this time, the pair of triangular plate portions 24 will be in contact with a pair of inclined grooves 28, and the pair of curved plate portions 25 will be in contact with a pair of curved grooves 27.

[0044] In this example, where the tension rod 6 and the side retainer 7 are connected as described above, when the water-stopping device 1 is in use as shown in Figures 1 and 2, the tension rod 6 bends upward due to the biasing force received from the biasing means 9, causing the pair of triangular plate portions 24 to separate from the pair of inclined grooves 28. However, the pair of curved plate portions 25 slide along the pair of curved grooves 27, increasing the force with which the pair of curved plate portions 25 press against the pair of curved grooves 27. In the illustrated example, the through hole 26a is an elongated hole so as not to hinder the above sliding, but this is not the only option; for example, the through hole 24a may be an elongated hole instead of the through hole 26a.

[0045] The retaining bar 8 is extendable and retractable within a range corresponding to the length of the tension rod 6, and only needs to be capable of achieving watertight sealing by pressing the lower edge 2b (see Figure 5(B)) of the upright watertight sheet 2 shown in Figures 1 and 2 against the floor surface F. In this example, the retaining bar 8 has an outer frame 31 and an inner frame 32 that are relatively slidable in the longitudinal direction of the retaining bar 8, as shown in Figures 6, 8(A) and (B), and 9(A) and (B). The outer frame 31 and inner frame 32 can be made of synthetic resin such as ABS resin, or metal such as steel or stainless steel.

[0046] As shown in Figure 9(E), the outer frame 31 is a long member with a roughly U-shaped cross-section that is open at the bottom. It consists of a top plate 31a, a pair of side plates 31b hanging down from the left and right sides of the top plate 31a, and a pair of legs 31c extending inward from the lower ends of the pair of side plates 31b. Each of the left and right side plates 31 has an inwardly recessed portion 31d. Note that in Figure 6, the recessed portion 31d is omitted from the illustration for simplification.

[0047] As shown in Figures 8(A) to (C) and 9(A), (B), and (D), the inner frame 32 is a long member that is housed in the outer frame 31 so as to be movable in the insertion and removal direction from one end (the left end in Figures 8(A) and (B)). As shown in Figure 9(C), it has a top plate 32a, a bottom plate 32b that extends parallel to the top plate 32a below the top plate 32a, a pair of side plates 32c that connect the top plate 32a and the bottom plate 32b on the left and right, and a pair of left and right legs 32d that protrude downward from the lower surface of the bottom plate 32b. Since the left and right side plates 32c are located away from the left and right ends of the top plate 32a and the bottom plate 32b, the left and right edges 32e of the top plate 32a and the left and right edges 32f of the bottom plate 32b have a flange shape.

[0048] When the inner frame 32 is inserted into the outer frame 31, as shown in Figure 9(D), the left and right flange-shaped edges 32e of the top plate 32a of the inner frame 32 cannot pass downward between the pair of recessed portions 31d of the outer frame 31, and the left and right flange-shaped edges 32f of the bottom plate 32b of the inner frame 32 cannot pass downward between the pair of legs 31c of the outer frame 31. This prevents the inner frame 32 from falling out of the groove at the bottom of the outer frame 31.

[0049] As shown in Figure 6, the inner frame 32, which is inserted into the outer frame 31 from one end (the left end in the figure), has through holes 32g at its other end that penetrate the left and right side plates 32. The inner frame 32 can be connected to the side retainer 7 by fastening the through holes 33a, which are elongated holes extending vertically and formed in the lower parts of a pair of side plates 33 extending from the left and right sides of the pressing surface 21 of the side retainer 7, to the pair of through holes 32g in the inner frame 32 using fastening members (in this example, a grooved hinge pin 34, an E-ring 35 that engages with an annular groove formed on the tip of the pin 34, and a washer 36 held by the E-ring 35). The inner frame 32 can be connected to the side retainer 7 in this way, as it allows the inner frame 32 to be detachably connected to the side retainer 7, which is preferable in terms of compactness when the water-stopping device 1 is stored.

[0050] On the other hand, in this example, as shown in Figure 8(A), a short inner frame 32A is connected to the other end of the outer frame 31 into which the inner frame 32 is inserted from one end (the left end in the figure), for attaching the outer frame 31 to the side retainer 7. The short inner frame 32A has the same cross-sectional shape and material as the inner frame 32, but is constructed as a shorter member than the inner frame 32. This short inner frame 32A is inserted into the inside of the outer frame 31 from the other end, and the short inner frame 32A can be connected to the outer frame 31 by fastening it through a pair of through holes 31e formed on the left and right sides of the other end of the outer frame 31 and a pair of through holes 32h formed on the left and right sides of one end (the left end in the figure) of the short inner frame 32A by passing fastening members (blind rivets 37 in this example) through them. Here, the short inner frame 32A may be detachably connected to the outer frame 31 using fastening members as described above, but is not limited to this. For example, without using the fastening members described above, both 31 and 32A may be connected and fixed by adhesive or the like, so that the short inner frame 32A cannot be removed from the outer frame 31. The short inner frame 32A can be connected to the side retainer 7 in the same way as the inner frame 32, and the explanation of that would be redundant, so it is omitted here.

[0051] In the retaining bar 8 configured as described above, the outer frame 31 and the inner frame 32 (32A) are each provided with a pair of legs 31c and 32c that contact the lower edge 2b of the waterproofing sheet 2 (see Figure 5(B)), and each of these legs extends in the longitudinal direction of the retaining bar 8. The retaining bar 8, with an overlapping portion formed between the outer frame 31 and the inner frame 32 (32A), allows for continuous pressure to be applied to the lower edge 2b of the waterproofing sheet 2 from one end to the other in its longitudinal direction, and in areas of two or more rows at any position, thereby ensuring reliable waterproofing.

[0052] The biasing means 9 can exert a vertical bracing force between the bracing rod 6, which is fixed by its horizontal bracing force, and the retaining bar 8 positioned below it, thereby biasing the retaining bar 8 downwards. Its configuration is not particularly limited. The biasing means 9 of this example, which employs a jack structure, will be described below.

[0053] As shown in Figure 10(A), the biasing means 9 used comprises, as shown in Figure 10(B), a base 38 with a substantially U-shaped cross-section and an open bottom that is pressed against the upper part of the retaining bar 9 (outer frame 31 or inner frame 32), a substantially cylindrical grip 39 that is held above the base 38 so as to be rotatable around its axis, and a head 40 having a male screw 40a that is screw-connected to a female screw 39a formed on the inner circumferential surface of the grip 39.

[0054] The base 38 has a top plate 38a, side plates 38b hanging down from the left and right sides of the top plate 38a, and engaging claws 38c extending inward from the lower ends of the side plates 38b. As shown in Figure 10(A), it engages with the upper part of the outer frame 31 by sliding it from its end side, and in this state, it is configured so that it cannot be detached upward from the outer frame 31. Note that this engagement does not occur with the inner frame 32, which is slightly smaller than the outer frame 31, and it only presses against it, but even in this case, there is no problem with use. However, it is not limited to this, and for example, another type of base 38 may be prepared, such as one that engages with the upper part of the inner frame 32 instead of the outer frame 31, and the two types of base 38 may be used depending on the situation.

[0055] As shown in Figure 10(B), the grip 39 has a substantially cylindrical shape that is open upwards, and as shown in Figure 10(C), its lower end is closed by a bottom wall 39b. An opening 39c is formed in the center of the bottom wall 39b, and a pair of retaining claws 38d, which are provided in the center of the top plate 38a of the base 38, are inserted from below into this opening 39c and engage with its edge. In this way, the grip 39 is held by the base 38 so as to be rotatable around its axis. Furthermore, an annular projection 39d is provided on the lower surface of the grip 39 to reduce resistance during this rotation.

[0056] As shown in Figure 10(B), the head 40 has a cylindrical connecting portion 40b on the upper side of the male screw 40a extending in the vertical direction, which connects to the tension rod 6 as shown in Figure 10(A). The connecting portion 40b is not limited to a cylindrical shape; it may also have a structure that can engage with the tension rod 6, such as a C-shaped cross-section. Furthermore, it is conceivable to use two types of heads 40: one with a connecting portion 40b sized to correspond to the outer shaft 10 of the tension rod 6, and another with a connecting portion 40b sized to correspond to the inner shaft 11.

[0057] In the biasing means 9 of the above structure, the length in the vertical direction can be changed by rotating the grip 39, as shown in Figures 10(D) and (E), thereby reliably biasing the retaining bar 8 downwards. Furthermore, as can be easily understood from Figure 10(A), since this biasing means 9 is movable in the longitudinal direction of the tension rod 6 (and retaining bar 8), by adjusting the length of the tension rod 6 and retaining bar 8 according to the distance between the pair of upright surfaces E, and then moving the biasing means 9 in the longitudinal direction of the tension rod 6, it is possible to press the retaining bar 8 against the floor surface F at a position that is effective for water sealing at the lower edge 2b of the water sealing sheet 2, which contributes to further reliable water sealing and easier installation.

[0058] In the illustrated example, three biasing means 9 are used, but the number of biasing means 9 can be changed as appropriate.

[0059] Next, the installation procedure for the water-stopping device 1 configured as described above will be explained.

[0060] (1) First, as shown in Figures 11(A) and (B), install the water-stopping sheet 2 on the inside of door D.

[0061] In this example, as described above, the waterproof sheet 2 is cut according to the installation opening W (see Figure 2) and folded appropriately (see Figures 12(A) to (C)) to obtain the waterproof sheet 2 in the upright state shown in Figure 3. By appropriately attaching tape T (see Figure 2), such as masking tape (adhesive tape), to the waterproof sheet 2 in this upright state, it is possible to prevent it from being unfolded. Then, the waterproof sheet 2 in this state is installed so that the main body 2a, lower edge 2b, left and right edges 2c and 2d (see Figure 5) are in close contact with the door D, the floor surface F, and the pair of upright surfaces E, respectively.

[0062] (2) Next, as shown in Figure 11(C), the fixing device 3 for fixing the water-stopping sheet 2 is positioned.

[0063] To ensure a smooth arrangement, it is preferable that the bracing rod 6, the pair of left and right side retainers 7, the retaining bar 8, and each biasing means 9 that constitute the fixing device 3 are pre-assembled.

[0064] (3) Adjust the length of the tension rod 6 and the retaining bar 8 so that the left and right edges 2c and 2d of the waterproof sheet 2 are pressed against the pair of upright surfaces E by the pair of left and right side retainers 7.

[0065] The approximate length of the tension rod 6 can be adjusted by sliding the inner shaft 11 relative to the outer shaft 10 and tightening the fixing bolt 12. Then, by rotating the grip 19, the left and right edges 2c and 2d of the waterproof sheet 2 are pressurized (see Figure 11(D)).

[0066] (4) Rotate the grips 39 of each biasing means 9 so that the pressing bar 8 presses the lower edge 2b of the waterproof sheet 2 against the floor surface F (see Figure 11(E)).

[0067] In this example, as shown in Figure 6, the through hole 33a provided in the lower part of the side retainer 7 is made into an elongated hole extending in the vertical direction, and both ends of the retainer bar 8 are connected to the lower part of the pair of side retainers 7 so that they can move up and down. Therefore, the side retainers 7 do not interfere with the downward biasing of the retainer bar 8 by the biasing means 9.

[0068] Furthermore, it is necessary to tighten the grips 39 so that there is no looseness in each biasing means 9. From this perspective, in this example in which three biasing means 9 are used, it is considered preferable to tighten the grips 39 of the left and right biasing means 9 first, and then tighten the grip 39 of the central biasing means 9 (see Figure 11(F)).

[0069] (5) If the waterproof sheet 2 fixed by the fixing device 3 is loose, the looseness is concentrated around the center in the left-right direction and the loose portion is folded to the back side of the waterproof sheet 2, thereby tensing the waterproof sheet 2 in the left-right direction, and the connecting piece 2R is connected and fixed to the two hook-and-loop fastener pieces 2M to maintain that state (see Figure 11(G)).

[0070] In other words, the connecting piece 2R has a hook-and-loop fastener portion on its entire back surface that can be detachably connected to the hook-and-loop fastener piece 2M.

[0071] In the water-stopping device 1 used as described above, the left and right edges 2c and 2d of the water-stopping sheet 2 can be pressed against the pair of upright surfaces E by side pressers 7 provided at both ends of a bracing rod 6 that is positioned to brace against the pair of upright surfaces E. Furthermore, while the bracing rod 6 is held in place and not moved, the lower edge 2c of the water-stopping sheet 2 can be pressed against the floor surface F by a pressing bar 8 located below the bracing rod 6 and biased downwards by a biasing means 9. By pressing the upright water-stopping sheet 2 against the floor surface F and the pair of upright surfaces E in this way, reliable water-stopping can be ensured. Moreover, since there is no need to use heavy components that would make transportation difficult, the installation of the water-stopping device 1 can be made easy.

[0072] Furthermore, a sealing material 4 is provided in the portion of the water-stopping sheet 2 that is pressed by the fixing device 3. As shown in Figure 2(B), this sealing material 4 is compressed when pressed, and can adhere tightly to the unevenness of the upright surface E or floor surface F, even if there are some irregularities, thus providing high water-stopping and watertightness.

[0073] It should be noted that the present invention is not limited in any way to the embodiments described above, and can be implemented in various ways without departing from the spirit of the invention, and it goes without saying that the modifications described herein can be combined as appropriate.

[0074] In the example shown in Figure 11(G), the connecting piece 2R, which is not fixed to the upper part 2Sa, is connected and fixed to the hook-and-loop fastener piece 2M to apply tension to the waterproof sheet 2. However, the method is not limited to this, and for example, a part of the connecting piece 2R may be fixed to the upper part 2Sa. Alternatively, instead of connecting and fixing the connecting piece 2R to the hook-and-loop fastener piece 2M, for example, an adhesive tape with relatively strong adhesive force may be attached to the upper part 2Sa to apply tension to the waterproof sheet 2.

[0075] Here, if the vertical width of the side retainer 7 is made too large, there is a risk that the pressing force against the water-stopping sheet 2 will be insufficient at points on the side retainer 7 that are far above and below the tension rod 6. For this reason, it is desirable to set the vertical width of the side retainer 7 to an appropriate range that does not result in insufficient pressing force against the water-stopping sheet 2. However, if this is done, there will inevitably be cases where the expected water level at the installation location of the water-stopping device 1 exceeds the vertical width of the side retainer 7. In such cases, it is conceivable to use a water-stopping sheet 2 with a larger vertical width and to install multiple water-stopping devices 1 in multiple vertical rows. However, while the retaining bar 8 functions in the lowest water-stopping device 1, it does not function effectively in the other water-stopping devices 1, making it structurally inefficient.

[0076] Therefore, as shown in Figures 14(A) and (B), an extension device 1E may be prepared separately from the water-stopping device 1, which lacks the retaining bar 8 and the biasing means 9 for biasing the retaining bar 8 downward, and the extension device 1E may be installed above the water-stopping device 1. Of course, it is also possible to install yet another extension device 1E above the extension device 1E. This extension device 1E may have a side retainer 7 with the same structure as the side retainer 7 of the water-stopping device 1, but since there is no need to connect the retaining bar 8, in the illustrated example, it has a side retainer 7E that lacks the structure for connecting the retaining bar 8.

[0077] The biasing means 9 described above may be configured as shown in Figures 15(A) to (D), for example. Specifically, in the biasing means 9 shown in Figures 15(A) to (D), an upward-extending male screw 40a is provided in the center of the top plate 38a of the base 38, which has a roughly U-shaped cross-section and is open at the bottom, and an internal screw 39a formed on the inner circumferential surface of the grip 39 is screw-connected to this male screw 40a. In addition, an opening 39c is provided in the center of the top wall 39e of the grip 39, and a pair of downward-extending retaining claws 38d are provided in the center of the lower surface of the head 40. The pair of retaining claws 38d are inserted into the opening 39c and engaged with its edge, thereby allowing the grip 39 to be held by the head 40 so as to be rotatable around its axis. Furthermore, in this biasing means 9, the connecting portion 40b is not cylindrical but has a C-shaped cross-section, and the cylindrical lower end of the head 40 is fitted onto the cylindrical upper end of the grip 39 so as to be slidable around its axis.

[0078] If a gap is formed between the waterproofing sheet 2 of the waterproofing device 1 in its installed state and the surface of the upright surface E or floor surface F due to reasons such as the presence of irregularities on the surface of the upright surface E or floor surface F as shown in Figures 1 and 2, the gap may be filled by appropriate means. For example, if the gap is relatively small or has a special shape (irregular shape), it may be possible to fill the gap with a gap-filling material such as clay or silicone rubber. If a relatively large gap or a gap in the shape of a plate (a gap that is not a special shape) is formed due to the presence of a frame, decorative material, step, etc., it may be possible to install a plate-shaped spacer made of synthetic resin or the like to fill the gap. [Explanation of Symbols]

[0079] 1. Water-stopping device 1E Extension device 2. Waterproof sheet 2a Main body 2b Lower edge 2c Left edge 2d right edge 2H reinforcement band 2M hook-and-loop fastener piece 2R connection piece 2S Sheet Material 2S1 Reinforcement Sheet 2S2 Folding Reinforcement Sheet 2Sa Top 3 Fixing device 4. Sealant 5. Anti-slip material 6. Tension rod 7. Side press 7E Side retainer 8. Retaining bar 9. Biasing means 10 External shaft 11 Inner shaft 12 Fixing bolts 13 Expansion tube 14 Receiving part 15 caps 16. Biasing member 17 Jacking mechanism 18 Male threaded cylinder 19 Grip 20 caps 21 Pressing surface 22. Oscillating joint 23 Joint receiver 24 Triangular plate part 24a through hole 25 Curved plate section 26 protrusion 26a Through hole 27 Curved groove 28 Slant groove 29 Grooved hinge pins 30 E-rings 31 Outer frame 31a Top plate 31b side plate 31c leg 31d Recessed area 31e Through hole 32 Inner frame 32A Short inner frame 32a Top plate 32b bottom plate 32c side plate 32c leg 32e Edge 32f edge 32g through hole 32h through hole 33 Side panel 33a Through hole 34 Grooved hinge pins 35 E-ring 36 Washer 37 Blind Rivets 38 Bass 38a Top plate 38b side plate 38c engaging claw 38d retaining claws 39 Grip 39a Female thread 39b Bottom wall 39c aperture 39d Annular projection 39e Ceiling wall 40 heads 40a Male thread 40b Connection part Door D E Elevation plane F Floor h vertical width L1 Right-hand side L2 Valley Fold Line L3 bottom edge L4 mountain fold line T Tape W Installation width

Claims

1. A water-stopping device that brings the lower edge and both left and right edges of an upright water-stopping sheet into close contact with the floor surface and a pair of upright surfaces that rise from the floor surface and face each other, A tension rod is positioned to brace against a pair of upright surfaces, A pair of side retainers are provided at both ends of the tension rod to press the left and right edges of the waterproof sheet against a pair of upright surfaces, A retaining bar extends along the longitudinal direction of the tension rod below the tension rod and presses the lower edge of the waterproof sheet against the floor surface, A water-stopping device comprising a biasing means for biasing a tension rod and a retaining bar in a direction that separates them from each other.

2. The water-stopping device according to claim 1, wherein the retaining bar has an outer frame and an inner frame that are slidable relative to each other in the longitudinal direction of the retaining bar, and the outer frame and the inner frame each have portions that extend in the longitudinal direction of the retaining bar and contact the lower edge of the water-stopping sheet.

3. The water-stopping device according to claim 1 or 2, wherein the biasing means is movable in the longitudinal direction of the tension rod.

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