JP7401901B2 - Water-shielding sheet, how to lay a water-shielding sheet - Google Patents

Description

The present invention relates to a water-blocking sheet and a method for laying the same.

For example, when carrying out construction work, etc., water-shielding sheets are often used for purposes other than water-shielding, although they may of course be used for purposes other than water-shielding.
In addition, in recent years, typhoons and other disasters have been increasing in Japan, and water-shielding sheets are also used to cover the roofs of houses that have been damaged during such disasters, or to temporarily cover slopes of land that are likely to collapse. It will be done.
The water-blocking sheet used for the above purpose is generally called a blue sheet.

By the way, there are points that should be improved in the water-blocking sheet as described above.
First, a general water-shielding sheet is simply a single sheet and does not have any special structure other than that. Therefore, it is difficult to stretch the sheet while applying tension to the entire sheet. For example, if there is no tension in the water-shielding sheet that has been stretched out, if it is not in a taut state, rainwater will accumulate in the recesses in the sheet, increasing the possibility of water leakage. Become. Further, even when it is desired to stretch a plurality of sheets adjacent to each other, it is difficult to connect the sheets while maintaining a certain degree of water-blocking properties at the connecting portions, which is the original purpose of using the sheets.
Some blue sheets, which are examples of water-shielding sheets, have four holes drilled using eyelets in the four corners of the water-shielding sheet, and those that use eyelets along the four sides of the water-shielding sheet. Some have a large number of holes drilled through them. In these water-shielding sheets, if the holes are used, it is possible to stretch the water-shielding sheets under tension or to connect adjacent water-shielding sheets to each other.

However, the above-mentioned holes are not suitable for tying a relatively thick linear body (such as a rope) to the water-shielding sheet in order to apply tension to the entire water-shielding sheet. Furthermore, even if the holes lined up along the mutually contacting sides of adjacent water-shielding sheets are tied together with a linear object (relatively thin rope or string), gaps will occur between the water-shielding sheets and the water-shielding properties will not be maintained. This may lead to unsatisfactory results.

The present invention aims to solve one of the above-mentioned problems, that is, the impossibility of stretching a water-blocking sheet under tension. A further object of the present invention is to improve water-shielding sheets so that adjacent water-shielding sheets can be connected while maintaining at least some degree of water-shielding properties in the adjacent portions.

In order to solve the above problems, the inventor of the present application proposes the following invention.
The present invention has a sheet main body that is a rectangular sheet having water-blocking properties, and a sheet main body that is parallel to a first side that is one of the four sides of the sheet main body and has approximately the same length as the first side. , a plurality of first belt-shaped bodies whose substantially entire lengths are belt-shaped bodies fixed to the sheet body, and parallel to a second side which is the side adjacent to the first side among the four sides of the sheet body. and a plurality of second band-shaped bodies having substantially the same length as the second side and having substantially the entire length fixed to the sheet main body. be.
The present invention is constructed based on a sheet main body which is a rectangular sheet having water-blocking properties.
As mentioned above, conventional water-blocking sheets are not suitable for being stretched under tension. This is because conventional water-shielding sheets do not have structures (for example, holes) suitable for connecting relatively thick linear bodies that have the strength necessary to apply tension to the water-shielding sheets. Of course, if the holes existing in the conventional water-shielding sheet are made to have a diameter that allows such a somewhat thick linear body to pass through, it is possible to connect a somewhat thick wire state to the conventional water-shielding sheet. However, such efforts have not been made in the past. The reason for this is that since the water-shielding sheet itself has low tensile strength, it is difficult to apply tension to the water-shielding sheet in the first place.
In addition to the sheet body, the water-blocking sheet in the present invention is parallel to the first side, which is one of the four sides of the sheet body, and has approximately the same length as the first side, and has approximately the entire length. A plurality of first belt-shaped bodies, which are belt-shaped bodies fixed to the seat body, are parallel to the second side, which is the side adjacent to the first side of the four sides of the seat body, and substantially the entire length of the first belt-shaped bodies is the sheet body. and a plurality of second band-shaped bodies that are fixed to the main body.
Both the first belt-like body and the second belt-like body are belt-like bodies, and are attached to the seat body. The first belt-shaped body and the second belt-shaped body are parallel to either side of the rectangular sheet body and are perpendicular to each other. A plurality of both the first band-like body and the second band-like body are attached to the seat body.
In other words, in the sheet main body of the water-blocking sheet according to the present invention, a plurality of first strips and second strips are arranged orthogonally to each other so as to form a lattice-like relationship with rectangular mesh. It is installed in the same condition.
Both ends of the first strip-like body and the second strip-like body are for connecting the other end of the first linear body, which is a linear body with one end fixed to a predetermined object, to an appropriate one of them. It can be used for. For this purpose, for example, if the end portions of the first and second strips are not fixed to the seat body, but are suspended from the seat body, if an appropriate design is made, the Since the first linear body can be relatively thick, or at least thicker than the second linear body described later, it is possible to tension the water-shielding sheet while applying tension to the sheet body or the water-shielding sheet. It is possible to pass it on.
Furthermore, the above-described first and second strips fixed to the seat body in a lattice pattern also contribute to increasing the tensile strength of the seat body or the water-blocking sheet. Therefore, it is better for the seat body itself to have high tensile strength, but even if the water-shielding sheet is stretched under tension without increasing the strength of the sheet body more than necessary, the water-shielding sheet Alternatively, the risk of damage to the seat body is reduced.

As described above, both ends of the first strip and the second strip are used to connect with the other end of the first linear body. For example, the connection between the two can be made by tying the other end of the first linear body to the portion of the first strip and the second strip that floats from the sheet body; It is also possible to do this using equipment.
A first hole is provided at both ends of the first band-shaped body and the second band-shaped body, and the first hole is a hole for connecting to the other end of the first linear body, which is a linear body whose one end is fixed to a predetermined object. may be provided. If the first hole exists, by using the first hole, it becomes easy to connect both ends of the first strip-shaped body and the second strip-shaped body and the other end of the first linear body.
The first hole is formed by fixing the folded end of the first band-like body or the second band-like body slightly toward the center in the length direction of the first band-like body or the second band-like body. It's okay. Of course, it is possible to provide the first hole by attaching ring-shaped metal fittings to both ends of the first band-like body and the second band-like body, but it is possible to form the first hole as described above. In this case, a ring-shaped metal fitting or the like becomes unnecessary, so that it becomes easy to reduce the cost for obtaining the first hole.

As described above, the first belt-shaped body and the second belt-shaped body are fixed to the seat body in a grid-like manner. Any method may be used to fix them to the sheet body, and for example, sewing can be used as the fixing method. Since at least the surface of the sheet body is generally made of resin, it is also conceivable to fix the sheet body and the first and second belt-like bodies by, for example, thermal welding or thermal fusion. However, if the strength of the sheet body is to be supplemented by the first and second strips, there is a possibility that the first and second strips are thermally welded or made of a material that is difficult to heat-seal. expensive. Even in such cases, suturing will not cause any problem in fixing the first and second strips to the sheet body, and the strength of the sheet body will be lower than when heat welding or heat fusion is used. Because it is difficult to use, it is also suitable for stretching water-blocking sheets under tension.
Note that the first band-shaped body and the second band-shaped body may be attached to either side of the seat body, or may be attached to both sides of the seat body. Although there is little benefit to doing so, at least one of the first strips may be fixed to the opposite side of the seat body from the other strips. The same applies to the second band-shaped body.
When the first strip and the second strip are fixed to the sheet main body by stitching, the water-blocking sheet may include a shielding structure that watertightly closes the needle holes formed by the stitching. For example, an example of the shielding structure is a tape that is attached to the sheet body so as to cover the location where the needle hole exists in the sheet body and has the function of watertightly preventing the needle hole. In addition, another example of a shielding structure is a water-blocking layer that has the function of watertightly preventing needle holes that are formed in a layer on the surface of the sheet body by being applied to the location where needle holes exist in the sheet body and drying. becomes.

The sheet body in the present invention is rectangular and its details do not matter as long as it has water-blocking performance.
On the other hand, the sheet main body includes a first sheet that is a rectangular sheet with water-blocking properties, and a rectangular sheet with water-blocking properties whose base end position from the center is fixed near the four sides of the first sheet. The second sheet may include a second sheet whose four sides are outside or inside the first sheet by a certain distance from the four sides of the first sheet. In this case, the second sheet is one size larger or smaller than the first sheet. When the sheet body includes a first sheet and a second sheet, the first sheet or the second sheet is located slightly inside the four sides of the outer periphery of the first sheet and the four sides of the outer periphery of the second sheet. A plurality of second holes may be drilled along the four sides of the sheet. That is, a large number of second holes, which are holes along the four sides, may be bored near the edges of the first sheet and the second sheet.
This second hole can be used to connect and fix adjacent sides of two water-shielding sheets with a second linear body when connecting adjacent water-shielding sheets. can. When connecting water-shielding sheets with the same configuration as adjacent sheet bodies, the sides of the sheet bodies with the same length should be adjacent to each other, and the relationship between the front and back sides of the first sheet and second sheet of the adjacent water-shielding sheets should be Arrange it so that it is reversed. Then, on the sides of the mutually connected sheet bodies of adjacent water-shielding sheets, the tip (edge) of the first sheet in one water-shielding sheet and the tip (edge) of the second sheet in the other water-shielding sheet butt. At the same time, the tip (edge) of the second sheet in one of the water-shielding sheets is brought into contact with the tip (edge) of the first sheet in the other water-shielding sheet. Then, the second holes present in each of the adjacent first sheet and second sheet are connected and fixed by a second linear body. When two water-shielding sheets are connected in this way, in the part where the water-shielding sheets are connected, a linear gap appears when the leading edge of the first sheet and the leading edge of the second sheet butt against each other. A total of two gaps are generated, one on each side of the sheet, and when the water-blocking sheet is viewed from the vertical direction, the linear gaps are parallel but shifted in position. This makes it difficult for water to leak from the mutually connected sides of the water-blocking sheet.
The second sheet is generally rectangular. On the other hand, the second sheet may be an annular sheet having rectangular holes having a shape substantially similar to that of the second sheet. The part near the center of the second sheet (for example, the area corresponding to the rectangular hole) has no special function, so omitting that part will not cause any problems with the performance of the second sheet or the sheet body. . On the other hand, by omitting that portion, the area of the second sheet can be reduced, so it is possible to suppress the manufacturing cost of the water-blocking sheet. Even when the second sheet is a rectangular annular sheet, the second sheet does not need to be a single sheet. For example, the annular second sheet may be constructed by combining four elongated rectangular sheets corresponding to the four sides of the rectangular annular shape.

The present inventor also proposes a method for laying a water-blocking sheet in the present invention as an aspect of the present invention. The effect of this method is equivalent to the effect of the water-blocking sheet described above.
An example of a method for laying a water-blocking sheet is to install a rectangular first sheet with water-blocking properties, and a rectangular and rectangular first sheet whose base end position from the center is fixed near the four sides of the first sheet. a rectangular sheet comprising: an annular second sheet with holes and water-impermeable properties, the four sides of which are outside or inside the first sheet by a certain distance from the four sides of the first sheet; a main body, and a belt-like shape that is parallel to a first side that is one of the four sides of the sheet main body, has substantially the same length as the first side, and has substantially the entire length fixed to the sheet main body. a plurality of first strip-like bodies, which are the body, and a second side that is the side adjacent to the first side among the four sides of the sheet main body, and is parallel to and has approximately the same length as the second side. a plurality of second belt-like bodies, which are belt-like bodies whose substantially entire length is fixed to the sheet main body, and the four sides of the outer periphery of the first sheet and the outer periphery of the second sheet. In this method of laying a water-blocking sheet, a plurality of second holes, which are a number of holes along the four sides of the first sheet or the second sheet, are bored slightly inside the four sides of the sheet.
In this laying method, a plurality of appropriate ends of the first band-like body and the second band-like body in the water-blocking sheet are connected to the other end of the first linear body, which is a linear body with one end fixed to a predetermined object. By connecting with the waterproof sheet, the entire water-blocking sheet is stretched under tension. In this case, the number of water-shielding sheets stretched may be one or more.
In the above-described method for laying a water-blocking sheet, a plurality of water-blocking sheets having the same sheet body structure are used, and adjacent water-blocking sheets are arranged so that the sides of the sheet body having the same length are adjacent to each other. , and the first sheet and the second sheet are arranged so that the front and back sides thereof are reversed, and the second hole provided in the first sheet in one of the adjacent water-blocking sheets and the adjacent The second hole provided in the second sheet on the other of the water-shielding sheets is tied and fixed with a second linear body, and the The second hole provided in the second sheet and the second hole provided in the first sheet in the other of the adjacent water-blocking sheets are connected and fixed by a second linear body that is a linear body. You can do it like this. This makes it possible to easily connect adjacent water-shielding sheets to each other while suppressing water leakage from the sides to which the water-shielding sheets are connected.
When laying a water-shielding sheet, the water-shielding sheet can be sloped. This makes it possible to further suppress water leakage from the sides to which the water-blocking sheet is connected.

FIG. 1 is a plan view of a water-blocking sheet in one embodiment. FIG. 2 is an enlarged cross-sectional view showing a portion near the edge of the sheet body included in the water-blocking sheet shown in FIG. 1 where a first strip or a second strip exists. FIG. 3 is a side view showing a state in which a water-blocking sheet is stretched over an inclined surface. A front view showing a state in which a water-blocking sheet is stretched over an inclined surface. FIG. 3 is a cross-sectional view of a connecting portion when connecting water-blocking sheets to each other. FIG. 3 is a front view conceptually explaining the principle of the drainage function of a water-blocking sheet. The figure which shows the usage state when only one water-shielding sheet is used. The side view which shows the case where a water-shielding sheet is applied to the roof of a house.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

In this embodiment, a water-blocking sheet and its installation method will be described.
FIG. 1 shows a plan view of the water-blocking sheet 100.
The water-blocking sheet 100 includes a sheet main body 110 that is a sheet having water-blocking properties. The seat body 110 is rectangular. Of course, the sheet body 110 may be square.
Although not limited to this, the seat main body 110 in this embodiment includes a first seat 111 and a second seat 112. Both the first sheet 111 and the second sheet 112 are sheets that have water-blocking properties and are made of resin. The material of the first sheet 111 and the second sheet 112 is, for example, vinyl chloride resin.
The first sheet 111 is rectangular, and in this embodiment, as described later, the first sheet 111 is slightly larger than the second sheet 112, so the size and shape of the sheet body 110 are determined by the first sheet 111. has been decided.
The second sheet 112 has an overall rectangular shape, and in this embodiment, the second sheet 112 has a substantially similar shape to the first sheet 111 and is a rectangle that is slightly smaller than the first sheet 111. Although not limited thereto, the second sheet 112 has a rectangular hole 112A having a shape substantially similar to that of the second sheet 112 and having a size slightly smaller than that of the second sheet 112. The overall shape is a rectangular ring. The second sheet 112 does not need to be a single sheet, and may be configured by combining four sheet pieces, with the long side and short side in FIG. 1 being separate members. Although not limited thereto, the second sheet 112 in this embodiment is located on the back side in FIG. 1, that is, on the back side of the water-blocking sheet 100. The shaded area in FIG. 1 is the area where the second sheet 112 exists, but the reason why the outline is a two-dot chain line is that originally in FIG. This is because it is hidden by
The second sheet 112 is fixed to the first sheet 111 in a fixed range 112B that is a predetermined width from the edge of the rectangular hole 112A. The fixing range 112B is illustrated in FIG. 2(A), which is an enlarged cross-sectional view of a portion near the edge of the sheet body 110 where a first band-like body or a second band-like body, which will be described later, is present. The method of fixing the first sheet 111 and the second sheet 112 in the fixing range 112B can be selected as appropriate, but in this embodiment, it is done by thermal fusion.
Note that the rectangular holes 112A of the second sheet 112 may not exist. In that case, the second sheet 112 will be a mere rectangle and will not be annular.
In addition, a plurality of second holes 111H, which are holes, are provided along each side of the first sheet 111 slightly inward from the edges of the four sides. The interval between adjacent second holes 111H may or may not be constant. The second hole 111H needs to have a diameter that allows a second linear body, which will be described later, to pass therethrough. The second hole 111H is reinforced with an eyelet, for example.
Similar to the case of the first sheet 111, a plurality of second holes are provided along each side of the second sheet 112 slightly inward from the edges of the four sides, but for the sake of simplicity. Description is omitted in FIG.
Note that the second sheet 112 can also be made one size larger than the first sheet 111. However, the outer shapes of the first sheet 111 and the second sheet 112 are not allowed to match. In other words, it is essential that there is a distance between the edge of the first sheet 111 and the edge of the second sheet 112 on each side of the sheet body 110. When the second sheet 112 is one size larger, the cross section of the water-blocking sheet 100 at the same position as in FIG. 2(A) becomes as shown in FIG. 2(B).

The seat body 110 includes a first band-shaped body 120 and a second band-shaped body 130. All of them are elongated strips with a predetermined width. Further, all of them are made of a durable material having a higher tensile strength than the sheet main body 110. For example, the first band-like body 120 and the second band-like body 130 can be made of a woven fabric, such as a woven fabric made of hemp thread.

The first strip body 120 can be configured such that the long side of the sheet main body 110 (any of the four sides of the rectangle of the sheet main body 110) can be defined as the "first side" in the present invention; 1 side"), and the center in the longitudinal direction coincides with the center between the two short sides of the sheet main body 110. The first strip 120 also has approximately the same length as the long side of the sheet body 110. In this embodiment, as shown in FIG. 1, the first strip 120 is slightly longer than the long sides of the seat body 110, and both ends of the first strip 120 are slightly longer than the short sides of the seat body 110. Although the length of the first band-shaped body 120 may be the same as the length of the long side of the sheet main body 110, it may be slightly shorter than that. There are a plurality of first strip bodies 120. The spacing between them may or may not be constant, but in this embodiment, they are constant.
The first band-like body 120 is fixed to the seat body 110. Although not limited thereto, in this embodiment, the fixation is performed by sewing. More specifically, the first strip 120 is fixed by sewing to only the first sheet 111 of the two sheets that constitute the sheet main body 110. Almost the entire length of the first strip 120 is fixed to the first sheet 111. In this embodiment, dotted lines are drawn near both edges in the width direction of the leftmost first strip 120 in FIG. 1, and these dotted lines are sewn to the first sheet 111 by sewing. 120A of the needle holes in the first belt-like body 120 are shown. Note that similar needle holes 120A exist in other first strip bodies 120, but they are not shown. Note that in this embodiment, the first strip body 120 is not fixed to the seat body 110 to the first sheet 111 near the short side of the sheet body 110; The first band-shaped body 120 may be fixed to the sheet body 110 to the first sheet 111 in the entire range overlapping with the first sheet 111. Although not necessarily required and not shown in the drawings, in this embodiment, a shielding structure is provided to prevent water from leaking into the water-shielding sheet 100 through the needle holes 120A caused by sewing. There is. The shielding structure has a function of watertightly preventing the needle hole 120A attached to the sheet body 110 (for example, the back side of the first sheet 111 in FIG. 1) so as to cover the location where the needle hole 120A exists in the sheet body 110. It can be a tape with In addition, the needle holes 120A, which are applied to the locations where the needle holes 120A are present in the sheet body 110 (for example, the back side of the first sheet 111 in FIG. 1) and dried, are present in a layer on the surface of the sheet body 110. Another example of a shielding structure is a water-blocking layer that has a watertight function.
First holes 120H are provided at both ends of the first strip 120. Specifically, both ends of the first strip 120 are folded back as shown in FIGS. Loops 122 are provided at both ends of the first band-shaped body 120 by being fixed from the center. The hole inside this loop 122 is the first hole 120H. The first hole 120H is for fixing a first linear body, which will be described later, which is a rope in this embodiment, and has a diameter that allows at least the first linear body to pass through. The first band-shaped bodies 120 may be fixed to each other in the fixing range 121 by any method, but in this embodiment, this is done by sewing. Note that the first hole 120H may be formed by fixing a metal ring or other member to the tip of the first strip 120 instead of folding the first strip 120 as described above. .

The second strip 130 is parallel to the short side of the sheet body 110. As a result, the second strip 130 is perpendicular to the first strip 120. The second strip 130 also has approximately the same length as the short side of the sheet main body 110, and its center in the length direction coincides with the center between the two short sides of the sheet main body 110. In this embodiment, as shown in FIG. 1, the second strip 130 is slightly longer than the short sides of the seat body 110, and both ends of the second strip 130 are slightly longer than the long sides of the seat body 110. Although the second strip body 130 protrudes gradually, the length of the second strip body 130 may be the same as the length of the short side of the sheet body 110, or may be slightly shorter than that. There are a plurality of second strip bodies 130. The spacing between them may or may not be constant, but in this embodiment, they are constant.
The method of fixing the second strip 130 to the sheet main body 110 to the first sheet 111 is the same as that of the first strip 120, including the shielding structure. Reference numeral 130A shown only on the second strip 130 at the bottom of FIG. 1 is a needle hole similar to the needle hole 120A opened by sewing.
First holes 130H are provided at both ends of the second strip 130. The method of forming the first holes 130 in the second strip body 130 may be the same as the method of forming the first holes 120H in the first strip body 120, but is not limited thereto, as is done in this embodiment. . Specifically, both ends of the second strip 130 are provided with loops 132 as shown in FIGS. 2(A) and 2(B). The hole inside this loop 132 is the first hole 130H.

To manufacture the water-blocking sheet 100 in this embodiment, for example, a required number of first strips 120 and second strips 130 including the loops 122 and 132 described above are created. Next, the first strip 120 and the second strip 130 are fixed to the first sheet 111. Next, it is reasonable to perform a manufacturing process of fixing the second sheet 112 to the first sheet 111 to which the first strip 120 and the second strip 130 are fixed.
However, the manufacturing process depends on circumstances such as which of the first sheet 111 and the second sheet 112 is larger, and which of the first sheet 111 and the second sheet 112 the first strip 120 and the second strip 130 are fixed to. , can be changed as appropriate.

Next, a method of using the water-blocking sheet 100 described above will be explained.
The water-blocking sheet 100 in this embodiment can be used in most applications that require water-blocking. For example, in many situations where blue sheets are used for the purpose of blocking water, they can be used instead of blue sheets.

In this embodiment, first, a case will be described in which the water-blocking sheet 100 is used for the purpose of covering a slope that has collapsed due to a landslide caused by, for example, a heavy rain disaster.
FIG. 3 shows a side view of the water-blocking sheet 100 stretched across the slope X, and FIG. 4 shows a front view of the water-blocking sheet 100 stretched across the slope X. Note that the water-shielding sheet 100 in FIG. 3 has a partially curved upper portion as described later, but the water-shielding sheet 100 in FIG. 4 has no such curvature and is stretched over a flat surface. Indicates the condition.
In this embodiment, a total of nine water-shielding sheets 100 are used, which are connected in a 3×3 arrangement corresponding to the shape and size of the inclined surface X. The nine water-shielding sheets 100 used in connection are the same.
The water-blocking sheets 100 are arranged according to the following rules. First, adjacent sides of adjacent water-blocking sheets 100 are made to have the same length. Further, the front and back sides of the water-blocking sheets 100 whose sides are adjacent to each other are set to be opposite to each other. In this case, the water-blocking sheet 100 will have a relationship as shown in FIG. 4, for example. In the example shown in FIG. 4, a total of five water-shielding sheets 100 on the left and right of the upper tier, the center of the middle tier, and the left and right of the lower tier are used when the front side of the water-shielding sheet 100 in FIG. It faces up, and the other four water-shielding sheets 100 face down.
Then, as shown in FIG. 5, among the sides included in adjacent water-shielding sheets 100, one side of the first sheet 111 included in one water-shielding sheet 100 and the side included in the other water-shielding sheet 100 are One side of the second sheet 112 is brought into abutted state. Note that in FIG. 5, illustration of the first band-shaped body 120 and the second band-shaped body 130 is omitted.
In that state, the second hole 111H provided along the side of the first sheet 111 included in one water-shielding sheet 100 butted against the second sheet 112 included in the other water-shielding sheet 100, In this embodiment, among the second holes provided along the side of the second sheet 112 included in the water-shielding sheet 100 butted against the first sheet 111 included in one of the water-shielding sheets 100, adjacent ones are Then, they are tied together using a second linear body (not shown), which is a string. That is, to put it simply, the second hole 111H in the first sheet 111 and the second hole in the second sheet 112 in the range Y surrounded by the broken line in FIG. 5 are connected by the second linear body. The second hole 111H of the first sheet 111 and the second hole of the second sheet 112 are located at multiple locations corresponding to each other in the length direction of the side along which they are provided. Unless there are special circumstances, it is preferable that all the second holes 111H of the first sheet 111 and the second holes of the second sheet 112 that correspond to each other be connected by the second linear body.
As shown in FIG. 5, in the area where two water-shielding sheets 100 are in contact, there is a linear gap between the front and back sides of the water-shielding sheet 100 due to the edges of the first sheet 111 and second sheet 112 being butted against each other. In addition, a space S is formed between the first sheet 111 and the second sheet 112 on the upper side and the first sheet 111 and the second sheet 112 on the lower side. Although there is some possibility that water may leak through the space S at the connecting part of the water-blocking sheet 100, the positions of the upper and lower parts of the above-mentioned linear gap are shifted when viewed from above. The risk of such water leakage occurring is small. Furthermore, as will be described later, if the water-blocking sheet 100 is inclined as shown in FIG. 3, for example, the possibility of such water leakage is further reduced.

A first hole whose one end is connected to a predetermined object is inserted into the first hole 120H, 130H of an appropriate one of the loops 122, 132 located on the outer periphery of the plurality of water-shielding sheets 100 connected as described above. By connecting the other end of the first linear body 300, which is a thicker linear body than the two-linear body and is a rope, for example, the entire water-blocking sheet 100 is stretched under tension.
The water-shielding sheet 100 stretched under tension basically becomes flat as a whole, regardless of whether there is a single water-shielding sheet 100 or a plurality of water-shielding sheets 100 connected together. As shown, it may be curved (in some cases, it may not be curved into a smooth curved shape, but may be bent as shown in FIG. 8, which will be described later).
The first strip 120 and the second strip 130 of the water-shielding sheet 100 of this embodiment have first holes 120H and 130H that are large enough to pass through the linear body, which is a rope, so that they can be used as durable ropes. There is no problem in fixing the other end to the first holes 120H, 130H of the first strip 120 or the second strip 130. For example, the other end of the first linear body 300 and the loops 122, 132 having the first holes 120H, 130H can be fixed by tying the first linear body 300 to the loops 122, 132.
The object to which one end of the first linear body 300 used for fixing the water-blocking sheet 100 is fixed can be selected as appropriate. For example, in FIG. 3, one end of the first linear body 300 is fixed to an H steel 320 placed in a side gutter 310 or a pile 330 appropriately erected on a slope X. Fixing of one end of the first linear body 300 to the H steel 320 or the stake 330 may be appropriately performed by a known or well-known method, such as by tying the first linear body 300 to the H steel 320 or the stake 330.
Note that the first linear body 300 may be tied to all the loops 122 and 132, but this is not necessarily necessary, and the first linear body 300 may be tied to the loops 122 and 132 that are necessary to apply tension to the entire water-blocking sheet 100. That's enough.

Assume that rainwater enters the above-mentioned space S from the gap between the water-shielding sheets 100 at the part Z in FIG. 6 at the connecting portion of the water-shielding sheets 100. As described above, the entire water-blocking sheet 100 is sloped. Inclination is given not only in the vertical direction, but also in the horizontal direction unless there are significant exceptions. For example, in FIG. 6, it is assumed that the water-blocking sheet 100 has an inclination from the upper right to the lower left. Then, the rainwater that has entered the space S will be discharged from the side surface of the water-blocking sheet 100 through the route indicated by the arrow shown in FIG. Therefore, so-called water leakage that passes through the water-shielding sheet 100 in its thickness direction is less likely to occur.

Note that the water-blocking sheet 100 can be used alone. In that case, the second linear body is not used. As shown in FIG. 7, the water-blocking sheet 100 used as a single sheet is in a state where tension is applied as a whole using the first linear body 300.

The water-shielding sheet 100 can also be applied to the roof 410 of a house 400 (FIG. 8). FIG. 8 shows a state in which the water-blocking sheet 100 is applied to a gable-shaped roof 410 of a house 400.
The water-blocking sheet 100 may be one sheet, or may be a combination of a plurality of sheets as described above. The water-blocking sheet 100 is bent at the ridgeline of the roof 410, and the loops 122 and 132 present at the lower end are attached to the first linear body 300, one end of which is fixed to a stake 420 driven into the ground, for example. By being fixed to the other end, the whole is fixed to the roof 410 under tension.

100 Waterproof sheet 110 Sheet main body 111 First sheet 111H Second hole 112 Second sheet 120 First strip 122 Loop 130 Second strip 132 Loop 300 First linear body

Claims (9)

The main body of the sheet is a rectangular sheet with waterproof properties;
A belt-shaped body that is parallel to a first side that is one of the four sides of the sheet body, has approximately the same length as the first side, and has approximately the entire length fixed to the sheet body. , a plurality of first strips;
It is parallel to a second side that is adjacent to the first side among the four sides of the sheet body, and has approximately the same length as the second side, and approximately the entire length thereof is fixed to the sheet body. a plurality of second belt-like bodies, which are belt-like bodies;
It is a water-blocking sheet that is equipped with
The sheet main body includes a first sheet that is a rectangular sheet that has water-blocking properties, and a rectangular sheet that has water-blocking properties, and the four sides of the first sheet are separated by a certain distance from the four sides of the first sheet. a second sheet on the outside or on the inside;
The second sheet is fixed in parallel to the four sides of the first sheet near each of the four sides of the first sheet,
Slightly inside the four sides of the outer periphery of the first sheet and slightly inside the four sides of the outer periphery of the second sheet are respectively the four sides of the first sheet or the four sides of the second sheet. A number of second holes are drilled along the
When adjacent water-shielding sheets are arranged so that sides of the same length in the sheet body are adjacent to each other and the front and back relationships of the first sheet and the second sheet are reversed, one of the sheets The second hole of the first sheet in the sheet body and the second hole of the second sheet in the other sheet body can be tied and fixed by a second linear body that is a linear body. It is becoming close,
Waterproof sheet. A first hole is provided at both ends of the first band-shaped body and the second band-shaped body, and the first hole is a hole for connecting to the other end of the first linear body, which is a linear body whose one end is fixed to a predetermined object. is provided,
The water-blocking sheet according to claim 1. The first band-shaped body and the second band-shaped body are provided with extra length portions that are planned to be folded back at both ends thereof, and
The first hole fixes the tip of the folded extra length of the first strip or the second strip at a position slightly toward the center of the first strip or the second strip in the longitudinal direction. is formed by
The water-blocking sheet according to claim 2. The second sheet is a sheet having a rectangular hole having a shape substantially similar to the shape of the second sheet, which is located inside a portion of the second sheet fixed to the first sheet.
The water-blocking sheet according to claim 1 . The first belt-shaped body and the second belt-shaped body are fixed to the sheet main body by being sewn together.
The water-blocking sheet according to any one of claims 1 to 4 . comprising a shielding structure that watertightly closes the needle hole formed by the suture;
The water-blocking sheet according to claim 5 . A rectangular first sheet having water-blocking properties ; and a second sheet having four sides that are outside or inside the first sheet by a certain distance from the four sides of the first sheet. and a rectangular sheet body that is fixed in the vicinity of each of the four sides of the first sheet in parallel with the four sides of the first sheet ;
A belt-shaped body that is parallel to a first side that is one of the four sides of the sheet body, has approximately the same length as the first side, and has approximately the entire length fixed to the sheet body. , a plurality of first strips;
It is parallel to a second side that is adjacent to the first side among the four sides of the sheet body, and has approximately the same length as the second side, and approximately the entire length thereof is fixed to the sheet body. a plurality of second belt-like bodies, which are belt-like bodies;
It is equipped with
Slightly inside the four sides of the outer periphery of the first sheet and slightly inside the four sides of the outer periphery of the second sheet are respectively the four sides of the first sheet or the four sides of the second sheet. A number of second holes are drilled along the
A method for laying a water-blocking sheet, the method comprising:
By connecting a plurality of appropriate ends of the first band-like body and the second band-like body in the water-blocking sheet to the other end of the first linear body, which is a linear body with one end fixed to a predetermined object. , stretching the entire water-shielding sheet under tension;
How to lay a water-blocking sheet. giving an inclination to the water-blocking sheet;
A method for laying a water-blocking sheet according to claim 7 . The water-blocking sheet is a plurality of sheet bodies having the same configuration,
Adjacent water-blocking sheets are arranged so that sides of the same length in the sheet main body are adjacent to each other, and the front and back relationships of the first sheet and the second sheet are reversed,
Then, the second holes provided in the first sheet of one of the adjacent water-blocking sheets and the second holes provided in the second sheet of the other of the neighboring water-blocking sheets are connected in a linear manner. and the second hole provided in the second sheet in one of the adjacent water-shielding sheets and the first hole in the other of the adjacent water-shielding sheets. tying and fixing the second hole provided in the sheet with a second linear body that is a linear body;
A method for laying a water-blocking sheet according to claim 7 or 8 .

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