Water stop plate

Abstract

To provide a water stop plate which can be reduced in size during storage, is easy to carry even for women and elderly people, and can be easily installed immediately in a short time immediately after the occurrence of heavy rain.SOLUTION: A water stop plate has: linear L-shaped bending slits having a length ranging the entire width of a plastic cardboard, and having a width running from an indoor side liner becoming the indoor side when used, toward the outdoor side of a rib, but not reaching an outdoor side liner on the outdoor side; direction change slits provided at a predetermined number of intervals of a hollow section and alternately on the indoor side liner and the outdoor side liner, and having a length ranging between openings on both ends of the hollow section; and a closing section for closing the opening at either end of the openings on both ends of the hollow section, wherein the water stop plate is, when used, bent at approximately right angles at the L-shaped bending slits so as to be erectable at a standing plate section in an approximately vertical direction in a side view and a base plate section on which a weight in an approximately horizontal direction can be placed, and when stored, storable in a stacked state of being alternately folded in opposite directions at the direction change slits.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a waterstop that quickly and easily prevents a situation in which, when a large amount of rainfall such as a sudden downpour occurs in a short period of time, the water level outside on a road or the like rises suddenly and the interior of a building is flooded because drainage facilities such as manholes are unable to drain in time. [Background technology]

[0002] Patent Document 1 discloses a water-blocking sheet that is placed around the periphery of a building to protect the building from disasters such as flooding, and that includes a sheet that prevents water from entering the building, a main body that is arranged parallel to the sheet, an auxiliary installation part that is placed on the lower end of the main body, and an elastic sheet-holding member that is joined to the auxiliary installation part.

[0003] Patent Document 2 discloses a watertight method for sealing off water in an opening between a set of walls or pillars erected vertically on a floor, in which a foldable watertight device made up of a plurality of foldable watertight plates is spread out horizontally between the opening, and pressure is applied horizontally to make the gap between the left and right ends of the foldable watertight device and the set of walls or pillars watertight, and pressure is applied vertically toward the floor to make the gap between the bottom of the foldable watertight device and the floor watertight, thereby sealing off water in the opening.

[0004] Patent Document 3 discloses a waterstop comprising a metal body formed by a plurality of metal units in contact in the longitudinal direction, a connecting sheet covering one side of the metal body and allowing adjacent metal units to rotate relatively with the water-stopping side facing outward, and a rubber member covering the connecting sheet at least at both longitudinal ends and one lateral end of the metal units of the metal body and extending from both ends and one end to the outside of the metal body.

[0005] Patent document 4 discloses a water stopping device that prevents water from entering from one side to the other, which is approximately L-shaped and has a bottom plate with a water stopping member on the back side and a rising plate that rises from the rear end of the bottom plate, and has a connecting portion on at least one end side of the left and right ends of the water stopping device for connecting the water stopping devices to the left and right.

[0006] Patent Document 5 discloses a water-stopping method that can accommodate a variety of opening widths, in which a free-standing stand is prepared on an L-shaped metal base plate, with an inverted L-shaped metal plate and an L-shaped metal plate fixed at a width that allows a water stop to be sandwiched between them, the free-standing stand is installed in a number corresponding to the width of the building's opening, a water stop is inserted from above between the inverted L-shaped metal plate and the inverted L-shaped metal plate, the water stop is covered with a waterproof sheet, and sandbags or water bags are placed on top of the waterproof sheet and on the inverted L-shaped plate to use as weight.

[0007] Patent Document 6 discloses a simple waterstop that is made of a synthetic resin plate, has reinforcing members embedded in the horizontal direction to prevent bending due to water pressure, has frame fitting grooves cut into the vertical direction on both ends of the back surface of the waterstop, with width and spacing to fit into the frame of the entrance / exit to be installed, and is coated over the entire surface of the waterstop to protect the surface and reinforce its strength, and is equipped with a gasket on the bottom surface to prevent water from entering; when in use, the frame fitting grooves on the back surface of the waterstop are fitted into the bottom of the frame of the entrance / exit to be installed, and a fixing device is attached and fixed to the top of the waterstop to prevent the waterstop from floating up due to water. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 2023-67671 [Patent Document 2] Japanese Patent Application Publication No. 2018-123560 [Patent Document 3] Japanese Patent Application Publication No. 2017-48672 [Patent Document 4] Japanese Patent Application Laid-Open No. 2016-108897 [Patent Document 5] Patent No. 7292595 [Patent Document 6] Utility Model Registration No. 3197013 Summary of the Invention [Problem to be solved by the invention]

[0009] The flood prevention sheet of Patent Document 1 has the problem that the main body part has to be joined to the sheet by welding or sewing, which is troublesome.When storing the sheet, the sheet holding member is removed and placed parallel to the main body part, and when using the sheet, it is attached from below to the auxiliary installation part at the bottom end of the main body part.This raises the concern that the sheet holding member may be lost during storage, and causes problems with the removal and attachment being troublesome.

[0010] The folding water stop device of Patent Document 2 has the problem that it is necessary to provide a sealant made of closed-cell foam material between the bottom of the folding water stop device and the floor to make the space watertight, and it is also necessary to hang a downward pressurizing water bag to compress the sealant, which is troublesome.

[0011] The waterstop in Patent Document 3 uses metal units made of stainless steel or other metal, which makes it heavy and difficult for women and the elderly to carry and install. It also has the problem of requiring a connecting sheet to be attached to the metal units in order to align them, which is troublesome. It also has the problem of requiring separate rubber members to be installed on the building side and the floor side of the connecting member, which is troublesome.

[0012] The water stop device in Patent Document 4 has an L-shaped base plate and rising plate made of synthetic resin or FRP, and the triangular reinforcing part is stored separately, and must be transported and assembled when in use.As a result, since the L-shaped base plate, rising plate, and triangular reinforcing part must be stored, there are problems in that the device is bulky when stored, and because it is so large, it is difficult for women and the elderly to easily carry and set up.

[0013] The freestanding waterstop in Patent Document 5 involves assembling L-shaped and inverted L-shaped metal waterstops and then installing the waterstop covered with a waterproof sheet, which has the problem of taking a long time to install.

[0014] The simple water stop plate of Patent Document 6 has a straight, U-shaped reinforcing member made of aluminum or the like embedded horizontally in a synthetic resin plate, so it cannot be folded and requires a large amount of storage space, and the reinforcing member is heavy, making it difficult for women and the elderly to carry.

[0015] The present invention was devised in view of these problems, and aims to provide a water stop plate that can be stored in a small size, can be easily carried by women and the elderly, can be quickly and easily installed in a short time, and can prevent water from entering a building when heavy rainfall such as a sudden downpour is detected. [Means for solving the problem]

[0016] The waterstop described in claim 1 is a waterstop for preventing water from entering a building, the waterstop comprising a harmonica-shaped plastic cardboard having hollow portions formed by a columnar rib and two flat liners sandwiching the rib, and flexible rod-shaped or plate-shaped bodies inserted into each of a selected plurality of the hollow portions, the plastic cardboard having a length spanning the entire width of the plastic cardboard and an outdoor side extending from an indoor side liner that becomes the indoor side when in use toward the outdoor side of the rib at a predetermined position in the longitudinal direction of the plastic cardboard in a direction substantially perpendicular to the longitudinal direction. The panel has linear L-shaped bending slits that are deep enough not to reach the side liners, orientation change slits that are provided at a predetermined interval within the hollow section and alternately in the indoor liner and the outdoor liner, and that extend over the length between the openings at both ends of the hollow section, and a closing section that closes the opening at either end of the openings at both ends of the hollow section.When in use, the panel can be bent at approximately right angles at the L-shaped bending slits to allow it to be erected with a standing plate section that is approximately vertical in side view and a base plate section that is approximately horizontal and on which a weight can be placed, and when stored, it can be stored in a stacked state where it is alternately folded in opposite directions at the orientation change slits.

[0017] The waterstop described in claim 2 is characterized in that, in claim 1, elastic reinforcing tape is attached to the indoor liner portion of the L-shaped bending slit and to the outdoor liner portion facing the L-shaped bending slit across the rib, and elastic reinforcing tape is attached to the indoor liner or outdoor liner portion facing the direction change slit across the rib.

[0018] The waterstop described in claim 3 is characterized in that, in claim 1 or 2, a base plate cutout is provided in the base plate portion of the indoor liner or the outdoor liner, facing the direction-changing cutout across the rib, and when the upright plate portion is in an upright position, the upright plate portion can be bent at the base plate cutout and the direction-changing cutout.

[0019] The waterstop described in claim 4 is characterized in that, in claim 3, elastic reinforcing tape is attached to the indoor liner portion of the L-shaped bending cut and to the outdoor liner portion opposite the L-shaped bending cut across the rib, and elastic reinforcing tape is attached to the indoor liner or outdoor liner portion opposite the direction change cut across the rib where the base plate cut is not provided. [Effects of the Invention]

[0020] The waterstop described in claim 1 is lightweight because it is mainly made of plastic cardboard, which has the effect of making it easy for women and the elderly to transport and quickly transport to the installation location when heavy rainfall such as a sudden downpour is detected. Furthermore, since it can be set up by simply bending the plastic cardboard into an L-shape, it can be set up quickly and easily in a short time, even by women and the elderly, and it can prevent water from entering the building. It also has the effect of being highly durable and can be reused multiple times. It can also be folded, which has the effect of reducing its size when stored.

[0021] The waterstop described in claim 2 can prevent new cuts from expanding from the L-shaped bending cut and the direction change cut, and can reinforce the indoor liner or outdoor liner that faces the L-shaped bending cut or the direction change cut across the rib, thereby extending the period of repeated use.

[0022] The waterstop described in claim 3 can be easily cut from plastic cardboard with a cutter knife, so the erection shape of the standing part of the waterstop can be easily changed on site to a straight line, polygonal shape, approximately curved shape, etc., to suit the structure of the building where the waterstop is to be installed and the arrangement of plants, etc.

[0023] The waterstop plate described in claim 4 can prevent the expansion of new cuts from the L-shaped bending cut and from the direction change cut where the base plate cut is provided, and can reinforce the indoor liner or outdoor liner that faces the L-shaped bending cut or direction change cut across the rib, thereby further extending the period of repeated use. [Brief explanation of the drawings]

[0024] [Figure 1] 1A and 1B are explanatory diagrams of a waterstop of the present invention in a form in which the waterstop is installed in a linear upright position, in which (a) is a plan view and (b) is an enlarged explanatory diagram of part A in (a). [Figure 2] 1A and 1B are explanatory diagrams of a waterstop of the present invention in a form in which the waterstop is installed in a straight line, in which (a) is a front view and (b) is an enlarged explanatory diagram of part B in (a). [Figure 3] FIG. 10 is an explanatory diagram of the waterstop of the present invention in a linearly erected state prior to the formation of the crimped portion, where (a) is a front view and (b) is an enlarged explanatory diagram of portion C in (a). [Figure 4] FIG. 2 is a plan view illustrating a waterstop plate according to the present invention in which the upright portion is bent and erected. [Figure 5] FIG. 5 is an enlarged explanatory view of a portion D in FIG. [Figure 6] FIG. 2 is an explanatory diagram of the state in which the waterstop plates of the present invention are folded and stacked. [Figure 7] FIG. 2 is an explanatory diagram of a left side view taken along arrow P in FIG. [Figure 8] 2(a), where (a) is a cross-sectional view of a hollow portion into which a rod-shaped body is inserted, and (b) is a cross-sectional view of a hollow portion into which no rod-shaped body is inserted. [Figure 9] An explanatory diagram of the left side view of Figure 1(a) from the P arrow view with the reinforcing tape removed, where (a) is an explanatory diagram of the area where the rod-shaped body is inserted, and (b) is an explanatory diagram of the area where the rod-shaped body is not inserted. [Figure 10]FIG. 1 is an explanatory diagram of the water stop of the present invention when it is straightened without being bent at the L-shaped bending cut and reinforcing tape is applied, where (a) is an explanatory diagram viewed from one side in the thickness direction of the plastic cardboard, and (b) is an explanatory diagram viewed from the other side in the thickness direction of the plastic cardboard, which is the opposite side in the thickness direction of (a). [Figure 11] These are explanatory diagrams of plastic cardboard, where (a) is an explanatory diagram of the appearance of the plastic cardboard seen from one side in the thickness direction, (b) is an explanatory diagram of the harmonica-shaped appearance of the plastic cardboard, and (c) is an explanatory diagram of the plastic cardboard seen from the side. [Figure 12] An explanatory diagram of the plastic cardboard in Figure 11(a), in which a rod-shaped or plate-shaped body is inserted with the liner on one side in the thickness direction removed, (a) is an explanatory diagram viewed from one side in the thickness direction of the plastic cardboard, (b) is an explanatory diagram viewed from the harmonica-shaped side in the case of a rod-shaped body, and (c) is an explanatory diagram viewed from the harmonica-shaped side in the case of a plate-shaped body. [Figure 13] The figures show explanatory diagrams of the side of the plastic cardboard that will be on the indoor side when erected, with an L-shaped cut made in the width direction for bending the cardboard. (a) is an explanatory diagram of the side that will be on the indoor side when installed, (b) is an explanatory diagram of the F-F cross section of the part with the L-shaped cut, and (c) is an enlarged view of part G in (b). [Figure 14] This is an explanatory diagram of a case where orientation-changing cuts are made alternately on the liner facing the outside and the liner facing the inside of a plastic cardboard box. [Figure 15] 14A and 14B are enlarged views of FIG. 14, where (a) is an enlarged view of part H in FIG. 14 and (b) is an enlarged view of part K in FIG. [Figure 16] FIG. 1 is an explanatory side view of a waterstop plate of the present invention installed upright in contact with the exterior wall of a building. [Figure 17] 1A and 1B are explanatory diagrams illustrating a waterstop of the present invention installed in a straight line on the exterior wall of a building, where (a) is an explanatory diagram of a plan view, and (b) is an enlarged explanatory diagram of part N in (a). [Figure 18] FIG. 2 is an explanatory diagram of a plan view of the waterstop of the present invention when bent and installed upright around the exterior wall of a building. DETAILED DESCRIPTION OF THE INVENTION

[0025] The waterstop 1 of the present invention is a waterstop 1 that can be easily implemented in a short time by even women or elderly people as a measure to prevent water from entering the interior 91 of a building 30 through gaps 11 around the edges of doors 10 of houses or convenience stores, underfloor vents, etc., when the water level on the ground surface 50 of a road or the like rises in the event of heavy rainfall occurring in a short period of time, such as a sudden downpour, or when rain continues for a long period of time.

[0026] As shown in Figures 1, 2, 5, 6, 16 to 18, the waterstop 1 of the present invention is a waterstop 1 that prevents water from entering a building 30, and the waterstop 1 comprises a harmonica-shaped plastic cardboard 2 having hollow portions 8 formed by a columnar rib 3 and two flat liners 4, 5 sandwiching the rib 3, and flexible rod-like bodies 7 or plate-like bodies 9 inserted into each of a selected plurality of the hollow portions 8, and the plastic cardboard 2 is provided at predetermined positions in the longitudinal direction of the rib 3 in a direction approximately perpendicular to the longitudinal direction, the length of the plastic cardboard 1 being the entire width of the plastic cardboard 1 and the length of the indoor side liner 4 that is on the indoor side when in use from the indoor side liner 4 to the indoor side of the rib 3. The panel has linear L-shaped bending slits 6 of a depth S extending toward the outside 90 side and not reaching the outdoor liner 5 on the outdoor 90 side, direction-changing slits 17 of a length spanning between the openings at both ends of the hollow section 8, which are provided at a predetermined interval of the hollow section 8 and alternately in the indoor liner 4 and the outdoor liner 5, and a closing section 25 for closing the opening at either end of the openings at both ends of the hollow section 8.When in use, the panel can be bent at approximately right angles at the L-shaped bending slits 6 to be erected with a standing plate section 21 that is approximately vertical in side view and a base plate section 22 that is approximately horizontal and on which a weight 40 can be placed, and when stored, it can be stored in a stacked state where it is alternately folded in opposite directions at the direction-changing slits 17.

[0027] 7, 10(a), 10(b), 15, 16, 19, or 20, a reinforcing tape 43b is attached to the indoor liner 4 at the L-bending slit 6, a stretchable reinforcing tape 43a is attached to the outdoor liner 5 at the L-bending slit 6 across the rib 3, and a stretchable reinforcing tape 45a or 45b is attached to the indoor liner 4 or the outdoor liner 5 at the direction change slit 17 across the rib 3. As shown in FIG. 10(b), the reinforcing tape 43b and the reinforcing tape 45b are attached to the indoor liner 4, and as shown in FIG. 10(a), the reinforcing tape 43a and the reinforcing tape 45a are attached to the outdoor liner 5. This allows the L-bending slit 6 and / or the indoor liner 4 or the outdoor liner 5 at the side facing the direction change slit 17 to be reinforced. The reinforcing tape 43 or 45 may be, for example, a reinforcing tape for plastics, and is not limited to the above examples and may be any tape that can reinforce plastic cardboard.

[0028] When the standing plate portion 21 is to be bent like a folding screen for installation, as shown in Figures 4, 5 and 18, a base plate portion notch 16 is provided in the base plate portion 22 of the indoor liner 4 or the outdoor liner 5, facing the direction-changing notch 17 across the rib 3, so that when the standing plate portion 21 is set upright, the standing plate portion 21 can be bent like a folding screen at the base plate portion notch 16 and the direction-changing notch 17. The direction-changing slit 17 alone does not allow the standing plate portion 21 to be bent in an upright position, but if the direction-changing slit 17 is provided on one side of the indoor liner 4 and the outdoor liner 5 that form one hollow portion 8 in the base plate portion 22 and the base plate portion slit 16 is provided on the other side, the standing plate portion 21 can be bent like a folding screen and set upright with the standing plate portion 21 and the base plate portion 22 in an approximately L-shape.

[0029] When the base plate cut 16 is provided, the reinforcing tape 43 or the reinforcing tape 45 is formed by adhering a reinforcing tape 43b to the indoor liner 4 at the L-shaped bending cut 6, and an elastic reinforcing tape 43a to the outdoor liner 5 facing the L-shaped bending cut 6 across the rib 3, and also by adhering an elastic reinforcing tape 45a or 45b to the indoor liner 4 or the outdoor liner 5 facing the direction change cut 17 across the rib 3 where the base plate cut 16 is not provided.

[0030] As shown in Figures 16 to 18, the waterstop 1 of the present invention is a waterstop 1 that prevents water from entering the interior 91 side of a building 30, and areas where water may enter the building 30 include gaps 11 around doors 10 such as the entrance and exit of a convenience store or the front door of a house, and underfloor air vents.

[0031] As shown in Figures 1, 2, 7, 8, 11 and 12, the waterstop 1 comprises a harmonica-shaped plastic cardboard 2 having a plurality of columnar ribs 3 and two flat liners 4 and 5 sandwiching the ribs 3, and a flexible rod-shaped body 7 or a long plate-shaped body 9 inserted into each of a plurality of hollow portions 8 selected from the group of harmonica-shaped hollow portions 8.

[0032] As shown in Figures 11 to 13, the plastic cardboard 2 is a flat plate having a harmonica shape. The plastic cardboard 2 is composed of ribs 3, which are pillars of hollow portions 8 arranged at equal intervals, and liners 4 and 5, which sandwich the ribs 3. The size of the plastic cardboard 2 can be adjusted by changing the height and width dimensions depending on the installation location.

[0033] The plastic cardboard 2 is made from polypropylene, and is characterized by being lightweight, water-resistant, durable, and easy to cut with a cutter knife, so the waterstop 1 of the present invention is a waterstop 1 that makes use of the properties of the plastic cardboard 2.

[0034] 13(a) to 13(c), the plastic cardboard 2 has linear L-shaped bending slits 6 formed at predetermined positions in the longitudinal direction of the ribs 3 in a direction approximately perpendicular to the longitudinal direction, the L-shaped bending slits 6 having a length equal to the entire width of the plastic cardboard 2 and a depth S extending from the surface of the indoor liner 4, which faces the indoor 91 side in use, toward the outdoor 90 side of the ribs 3, but not reaching the outdoor liner 5. As shown in FIGS. 14 and 15, orientation change slits 17 (17a to 17d) are formed in the indoor liner 4 or the outdoor liner 5 of each of the hollow sections 8 at predetermined intervals between the hollow sections 8, extending from one end to the other in the width direction of the waterstop 1, so that the indoor 91 side and the outdoor 90 side alternate. The predetermined number of intervals between the hollow sections 8 correspond to the intervals at which the hollow sections 8 are alternately folded for stacking, as shown in FIG. 6. As shown in FIG. 4, the standing plate portion 21 can be bent like a folding screen and erected at locations where base plate cutouts 16 are also provided at predetermined intervals in the hollow portion 8.

[0035] As shown in FIG. 13(b) or (c), the depth of the L-shaped bending slit 6 is a single linear L-shaped bending slit 6 with a depth S between the indoor liner 4 on the indoor 91 side and the portion of the rib 3 on the indoor 91 side, leaving the outdoor liner 5 on the outdoor 90 side and the portion of the rib 3 on the outdoor 90 side. The L-shaped bending slit 6 can be easily made with a cutting means such as a utility knife. As shown in FIG. 13(c), the depth S of the slit in the rib 3 may be anywhere between 30 and 80% of the width M of the rib 3, but is preferably about 50%. If the depth S is about 50%, the uncut portion of the rib 3 functions as reinforcement for the outdoor liner 5, and the portion of the rib 3 is stretched, allowing it to be bent into a substantially L shape. Furthermore, as shown in Figures 7, 10 and 16, reinforcing tape 43b is attached to the L-shaped bending slit 6 of the indoor liner 4 on the indoor side 91 side, and reinforcing tape 43a is attached to the outdoor liner 5 on the outdoor side 90 side, thereby preventing the plastic cardboard 2 or the water stop body 1 from separating at the L-shaped bending slit 6.

[0036] The predetermined position for providing the L-shaped bending notch 6 is set appropriately, as shown in Figure 13 or 16, so that the length of the standing plate portion 21 above the L-shaped bending notch 6 will be higher than the water level expected in the event of a sudden downpour when installed on site, and so that the length of the base plate portion 22 below the L-shaped bending notch 6 will ensure a width sufficient to allow for the placement of a weight 40 to prevent the water stop 1 from being washed away and floating up.

[0037] Since the purpose is to prevent water leakage when a large amount of rain falls in a short period of time, such as a sudden downpour, or when rain continues for a long period of time, causing the water level on the ground surface 50 to rise, the length of the standing plate portion 21, i.e., the height when installed, may be set, for example, within a range of 500 to 1,000 mm, and the length of the base plate portion 22 may be set, for example, within a range of 200 to 500 mm, so as to accommodate the weight 40 when installed.

[0038] By bending at the L-shaped bending notch 6, the water stopper 1 can be bent into an approximately L-shape and erected, as shown in Figure 8(a) which shows a cross section of the hollow portion 8 with the rod-shaped body 7 or plate-shaped body 9 inserted, and as shown in Figure 8(b) which shows a cross section of the hollow portion 8 without the rod-shaped body 7 or plate-shaped body 9 inserted.

[0039] 8 or 9, the indoor-side liner 4 having the L-shaped bending slit 6 can have a larger bending radius than the outdoor-side liner 5 having no L-shaped bending slit 6, so the waterstop 1 is bent in the direction where there is no L-shaped bending slit 6. As a result, when the waterstop 1 is erected on the front side of the building 30, the indoor-side liner 4 having the L-shaped bending slit 6 faces the indoor side, and the outdoor-side liner 5 having no L-shaped bending slit 6 faces the outdoor side.

[0040] As shown in FIGS. 2, 7 to 9, and 16, a closing portion 25 is provided to close one of the openings at either end of the hollow portion 8. The hollow portion 8 has two openings, one at the end on the upright portion 21 side and the other at the end on the base plate portion 22 side. The closing portion 25 is preferably provided at the opening on the base plate portion 22 side of the hollow portion 8. Because the hollow portion 8 is hollow and perforated, water easily penetrates. To prevent this, the closing portion 25 closes the opening of the hollow portion 8 by tightly bonding the indoor liner 4 and the outdoor liner 4, which form the opening, together by thermocompression or pressure bonding. This prevents water, such as from heavy rain, from penetrating into the hollow portion 8 and into the indoor space 91. To enable the formation of the closing portion 25, the rod-shaped body 7 or the plate-shaped body 9 is inserted so as not to be present near either end of the hollow portion 8.

[0041] The weight 40 is not limited to the examples given above and may be any object that can press the base plate portion 22 against the ground surface 50, such as a sandbag, a flower pot, or a block.

[0042] As shown in Figure 12(a) or (b), the rod-shaped body 7 has a cross section that can be inserted into the hollow portion 8, and can be made of any material, such as metals such as aluminum or copper, synthetic resins such as polyvinyl chloride or polyethylene, or electric wire, as long as it is a flexible rod-shaped body.

[0043] As shown in Figure 12(a) or (c), the plate-like body 9 has a cross section that can be inserted into the hollow portion 8, and can be made of a material such as metal, aluminum, copper, or a synthetic resin, such as polyvinyl chloride or polyethylene.As long as it is a flexible plate-like body, it can be, for example, a flat plate.

[0044] As shown in Figure 12(a), (b) or (c), by inserting the rod-shaped body 7 or the plate-shaped body 9 into the hollow portion 8, the L-shaped shape of the plastic cardboard 2 can be maintained when the plastic cardboard 2 is bent into an approximately L shape at the L-shaped bending cut 6 as shown in Figure 16, and the approximately L-shaped shape of the plastic cardboard 2 can be maintained even when the water level rises and the water pressure increases.

[0045] 4, 14 or 15, the indoor liner 4 or the outdoor liner 5 of each of the hollow sections 8 at intervals of a predetermined number of the hollow sections 8 has orientation change slits 17 that are provided over a length spanning the length between the openings at both ends of the hollow sections 8 so that the indoor 91 side and the outdoor 90 side alternate in the width direction of the waterstop 1 from one end to the other. This allows the waterstop 1 to be folded at the positions of the orientation change slits 17, as shown in FIG. 4 or 18. This allows the waterstop 1 to be stacked for easy storage, as shown in FIG. 6.

[0046] As shown in Figure 14 or Figure 15, the bending direction at the orientation change slits 17 (17a, 17b, 17c, 17d) can be made larger in the bending R of the indoor liner 4 or outdoor liner 5 that has the orientation change slits 17 than the outdoor liner 5 that does not have the orientation change slits 17, so the water stop 1 is bent in the direction in which there are no orientation change slits 17.

[0047] Furthermore, as shown in Figures 4, 5 or 18, a base plate cutout 16 can be provided in the base plate portion 22 of the indoor liner 4 or the outdoor liner 5, which faces the direction-changing cutout 17 across the rib 3, so that when the standing plate portion 21 is erected, the standing plate portion 21 can be made bendable at the base plate cutout 16 and the direction-changing cutout 17.

[0048] As a result, the base plate portions 22 separated by the base plate portion cutouts 16 can be stacked together as shown in Figures 4, 5, and 18, using the orientation change cutouts 17 provided in the indoor liner 4 or the outdoor liner 5 on the side where the bending radius becomes larger when bent, and the base plate portion cutouts 16, making it possible to bend the standing plate portion 21 in a generally L-shaped upright state like a folding screen. This allows the orientation of the standing plate portion 21 of the waterstop 1 to be changed as shown in Figures 4, 5, and 18.

[0049] During storage, as shown in Figure 12(a), the L-shaped bending slits 6 are left unfolded and straight, and as shown in Figure 6, the waterstops can be stored in a stacked state, folded alternately in opposite directions at the direction-changing slits 17 (17a, 17b, 17c, 17d). This allows for storage in a small storage space. In this way, the direction of the standing plate portion 21 of the waterstop 1 can be changed together with the base plate portion slits 16 by the direction-changing slits 16, and the waterstops can be stacked during storage.

[0050] When in use, as shown in Figures 16 to 18, at the location of the L-shaped bending slit 6 cut across the entire width on the outdoor 90 side of the building 30, the bending R on the indoor liner 4 side where the L-shaped bending slit 6 is made is increased and bent at approximately a right angle to form an approximately L-shape with a standing plate portion 21 that is approximately vertical in side view and a base plate portion 22 that is approximately horizontal, and the standing plate portion 21 is set upright in an approximately straight line in the horizontal direction as shown in Figure 17, or as shown in Figure 18, the standing plate portion 21 is set upright by being bent like a folding screen, and the base plate portion 22 is installed on the ground surface 50 facing the outdoor 90 side.

[0051] 17(a) and 17(b), the horizontal ends of the substantially vertical standing plate portion 21 of the waterstop 1 are affixed with fixing tape 41 or the like to maintain close contact with the surface of the building 30, and as shown in Fig. 17(a) or 18, sandbags, flower pots, blocks or the like are placed on the upper surface of the base plate portion 22 of the waterstop 1 as weights 40. The fixing tape 41 is not limited to the examples given above, and any tape that has excellent adhesion to rough surfaces such as concrete and plywood, or curing tape, etc., may be used as long as it has excellent adhesion to rough surfaces such as concrete and plywood.

[0052] As described above, the water stop 1 is composed of the plastic cardboard 2 and the rod-shaped body 7 or the plate-shaped body 9, and therefore is lightweight, so that women and the elderly can easily and quickly install it by cutting and bending it to suit the local conditions, and since it has excellent water resistance and durability, it is less likely to be damaged by water pressure and can prevent water from entering the interior 91. [Explanation of symbols]

[0053] 1 Waterstop 2. Plastic cardboard 3. Ribs 4 Liner 5 Liner 6 L-shaped bending notch 7 Rod-shaped body 8 Hollow part 9 Plate-shaped body 10 Doors 11 Gap 16 Base plate cut 17 Direction change cut 21 Standing board 22 Foundation plate part 25 Closing part 30 Buildings 40 weight 41 Fixing tape 43 Reinforcement tape 45 Reinforcement tape 50 Ground surface 90 Outdoors 91 Indoor M width S Depth W width direction

Claims

1. A waterstop that prevents water from entering a building. The waterstop is a harmonica-shaped plastic cardboard having a hollow portion formed by a columnar rib and two flat liners sandwiching the rib; a flexible rod-shaped or plate-shaped body inserted into each of the selected plurality of hollow portions, The plastic cardboard is A linear L-shaped bending cut is provided at a predetermined position in the longitudinal direction of the rib in a direction approximately perpendicular to the longitudinal direction, the cut having a length spanning the entire width of the plastic cardboard and a depth extending from the indoor liner that becomes the indoor side when in use toward the outdoor side of the rib so as not to reach the outdoor liner that is on the outdoor side; direction-changing slits that are provided at intervals of a predetermined number of the hollow portions and alternately on the indoor liner and the outdoor liner, and that extend between the openings at both ends of the hollow portions; a closing portion that closes an opening at one end of the openings at both ends of the hollow portion, When in use, the L-shaped bending cut is bent at a substantially right angle to form a standing plate portion that is substantially vertical in side view and a base plate portion that is substantially horizontal and on which a weight can be placed, so that the stand can be erected. This waterstop is characterized in that, during storage, it can be stored in a stacked state in which it is alternately folded in opposite directions at the direction-changing slits.

2. A waterstop as described in claim 1, characterized in that elastic reinforcing tape is attached to the indoor liner portion of the L-shaped bending slit and to the outdoor liner portion opposite the L-shaped bending slit across the rib, and elastic reinforcing tape is attached to the indoor liner or outdoor liner portion opposite the direction change slit across the rib.

3. A base plate portion cut is provided in the base plate portion of the indoor liner or the outdoor liner, the base plate portion being opposed to the direction change cut across the rib, 2. The waterstop plate according to claim 1, wherein the upright portion is bendable at the base plate cut and the direction change cut when the upright portion is in an upright position.

4. A waterstop board as described in claim 3, characterized in that elastic reinforcing tape is attached to the indoor liner portion of the L-shaped bending cut and to the outdoor liner portion opposite the L-shaped bending cut across the rib, and elastic reinforcing tape is attached to the indoor liner or outdoor liner portion opposite the direction change cut across the rib where no base plate cut is provided.

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