JP2852477B2 - Waterproofing method for irregularly shaped protrusions on flat roofs, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproofing method for a trapezoidal shaped projecting portion on which, for example, a support for a fence or a support for an antenna is installed on a waterproof sheet-covered flat roof.

[0002]

2. Description of the Related Art In a flat roof in which a waterproof sheet is stretched by a so-called insulation method (floating method), a trapezoidal shaped projecting portion, that is, a trestle (so-called accessory), on which a fence support or an antenna support is installed is provided. If present,
Conventionally, a waterproof sheet has also been used for waterproofing such irregularly shaped projections.

[0003] That is, according to the conventional method, first, the upper part of the irregularly shaped projection is finished with a sander, then a primer and an adhesive are applied to these surfaces, and a waterproof sheet joint is fixed on the upper surface of the irregularly shaped projection. Fix the L-shaped joint at the corner between the rising wall of the irregularly shaped protrusion and the surrounding concrete wall to be waterproofed, cover the surface of the irregularly shaped protrusion and the surrounding concrete wall with a waterproof sheet,
The waterproof sheet and the joined body were joined together, and corner patches were attached to the four corners of the irregularly shaped projection from outside the waterproof sheet.

[0004]

However, according to such a conventional method, the work of waterproofing the irregularly shaped projections is difficult.
It is very troublesome and time-consuming, and requires a lot of skill in waterproofing work.As the actual working time is longer, the construction cost is higher, and after waterproofing, corner patches are formed at the four corners of the irregularly shaped protrusion. There was a problem that the appearance was impaired, such as appearing outside.

[0005] In view of the above points, the inventors of the present invention have conducted intensive studies in order to improve the work efficiency, and as a result, a portion having a small amount of expansion and contraction (movement) such as a deformed projection (a gantry / accessory). Is waterproofed with a paint film, and a waterproof sheet is applied to the normal part other than the irregularly shaped protrusions by the so-called insulation method (floating method).
The present inventors have found that a very good waterproofing work can be performed on a flat roof or the like by maintaining the boundary portion in a watertight manner, and completed the present invention.

According to the present invention, the work of waterproofing the irregularly shaped protrusions is not troublesome, the work time is about one third of the conventional method, and the waterproofing work requires no skill. An object of the present invention is to provide a waterproof construction method for irregularly shaped protrusions on a flat roof or the like, in which waterproof construction work can be easily and quickly performed, the waterproof construction cost is low, and the appearance after the waterproof construction is excellent. And

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a waterproof sheet stretched flat roof and the like.
A method of waterproofing a deformed protrusion, wherein a joining piece is fixed to a wall portion to be waterproofed around the deformed protrusion with a fixing tool, and stretched on a wall surface to be waterproofed such as a flat roof other than the deformed protrusion. The end of the waterproof sheet is joined to the upper surface of the joining piece around the deformed protrusion, and the entire surface of the deformed protrusion, and the upper surface of the end of the waterproof sheet around the deformed protrusion is covered with a reinforcing fiber sheet, Applying a synthetic resin waterproof paint to the reinforcing fiber sheet and impregnating it to form a waterproof layer made of synthetic resin waterproof coating impregnated fibers,
The skirt portion of the waterproof layer around the irregularly shaped protrusion is bonded to the upper surface of the end of the waterproof sheet by the adhesive force of the synthetic resin waterproof coating film itself. The gist is the waterproof construction method.

[0008] In the above description, a trapezoidal shaped projection, that is, a trestle (so-called accessory) on which a fence support or an antenna support or the like on a waterproof sheet-stretched roof or the like is installed.
In order to waterproof the part, first attach the joining piece to the wall part to be waterproof around the irregular projection with a fixing tool, and install the waterproof sheet stretched on the wall part to be waterproof such as the flat roof other than the irregular projection Is joined to the upper surface of the joining piece around the irregularly shaped projection.

Here, as the joining piece, a plate material such as a hard or semi-hard synthetic resin plate, a metal plate, or a steel plate (PVC steel plate) coated on one or both sides with a vinyl chloride resin to improve the adhesiveness is used. use. The width of this joint piece is
For example, it is preferably 40 to 120 mm, and it is usually preferable to dispose it over substantially the entire length of the irregularly shaped projection as viewed from a plane. As a fixing tool for fixing such a joint piece to a concrete wall surface, an open leg nail, a curl plug, or the like is used.

A waterproof sheet stretched on a wall surface to be waterproof such as a flat roof other than the irregularly projecting portion is, for example, a sheet made of a thermoplastic synthetic resin such as soft polyvinyl chloride, polyethylene, or polypropylene, or a non-vulcanized sheet. A rubber-based sheet, a rubber asphalt-based sheet, or the like is used, but it is preferable to use a soft polyvinyl chloride sheet, particularly from the viewpoint of adhesiveness. The thickness of the waterproof sheet is usually about 1.0 to
2.0 mm.

As an adhesive for joining the waterproof sheet and the joining piece, for example, an epoxy-based, urethane-based or rubber-based adhesive may be used. In particular, the joining surface between the waterproof sheet and the joining piece is made of vinyl chloride resin. It is preferable to use tetrahydrofuran (THF) alone or a solvent-type adhesive obtained by dissolving a vinyl chloride resin in tetrahydrofuran since an adhesive effect with excellent durability is produced.

Next, a reinforcing fiber sheet is placed over the entire surface of the irregularly shaped protrusion and on the wall surface to be waterproof such as a flat roof around the irregularly shaped protrusion. Here, as the reinforcing fiber sheet, a glass cloth, a synthetic resin fiber net such as a polyester fiber net or the like is preferably used. The reason why such a reinforcing fiber sheet is used is to particularly keep the waterproof coating film on the rising wall (vertical wall) of the irregularly shaped projection (stand) uniformly.

Next, a waterproof coating made of synthetic resin is applied to the reinforcing fiber sheet and impregnated to form a waterproof layer made of fibers impregnated with a synthetic resin waterproof coating film.

Here, as the synthetic resin waterproof coating, it is desirable to use a solution obtained by dissolving a vinyl chloride resin in tetrahydrofuran.

As other synthetic resin waterproof paints, there are waterproof paints mainly composed of urethane, epoxy, acrylic urethane and acrylic silicone.

The amount of the synthetic resin waterproof paint applied is
1.0 to 3.0 kg / m ² (1.0 to 3.0 mm thick).

At the periphery of the irregularly shaped projection, the skirt of the waterproof layer is joined to the upper surface of the end of the waterproof sheet by the adhesive force of the synthetic resin waterproof coating itself.

Finally, if a coating layer of a fluororesin waterproof paint is formed on the entire surface of the deformed protrusion and on the surface of the waterproof layer formed on the upper surface of the end of the waterproof sheet around the deformed protrusion, As the weather resistance increases,
preferable.

In general, a curing sheet is interposed between the waterproof sheet and the concrete wall surface of the flat roof to be waterproofed. The curing sheet has a curing action of protecting the waterproof sheet, and includes a foamed sheet having a thickness of 1 to 4 mm made of an independent foam of a thermoplastic resin such as polyethylene, polypropylene, polyurethane and polyvinyl chloride. Or a foamed sheet thereof and a reinforcing layer made of, for example, a film of polyethylene, polypropylene, polyvinyl chloride and polyester or a woven or non-woven fabric made of these resins, which is adhered to the entire surface by an adhesive or heating. Use a composite sheet.

[0020]

According to the above-mentioned waterproofing construction method, the waterproofing of the irregularly-shaped projections on the waterproof sheet-stretched flat roof or the like is performed without using a waterproof sheet as in the related art, and on the entire surface of the irregularly-shaped projections and around the irregularly-shaped projections. On the top of the end of the tarpaulin,
A reinforcing fiber sheet is covered, a synthetic resin waterproof paint is applied to the fiber sheet and impregnated to form a waterproof layer made of synthetic resin waterproof coating impregnated fibers, and a skirt portion of the waterproof layer around the irregularly shaped protrusion. Is bonded to the upper surface of the end of the waterproof sheet by the adhesive force of the synthetic resin waterproof coating film itself.

Therefore, according to the method of the present invention, compared to the conventional method, the work for waterproofing the irregularly shaped projections is less troublesome.
In addition to requiring only about one-third of the time required for the conventional method, the waterproofing work requires no skill, so that the waterproofing work can be performed easily and quickly, and the appearance after the waterproofing work is excellent.

[0022]

Next, an embodiment of the present invention will be described with reference to the drawings.

In order to waterproof the irregularly shaped projection (stand) 7 for installing a support (not shown) or the like on the flat roof 1, first, a wall (2) to be waterproofed around the irregularly shaped projection 7. ), A joining piece (4) made of PVC steel plate is fixed with a fixing tool (5) made of open nails, and the wall (2) of the roof (1) etc. other than the irregular projection (7) to be waterproofed The end (3a) of the waterproof sheet (3) stretched on the upper surface of the joining piece (4) was joined around the irregularly shaped projection (7).

The waterproof sheet (3) has a thickness of 1.
A 5 mm soft polyvinyl chloride sheet (trade name: Sunroid DN Sheet, manufactured by Tsutsunaka Plastics Industry Co., Ltd.) was used.

The joining piece (4) made of a polyvinyl chloride steel sheet has a width of 80 mm, and the side edge of the joining piece (4) on the side of the deformed projection (7) is provided for reinforcement. , Folded edge (4
a) was formed. In addition, in order to ensure the sealing property of the through hole of the fixture of the joint piece (4), an adhesive butyl tape (between the back surface of the joint piece (4) and the concrete wall surface (2) to be waterproofed) is used. 9) was interposed.

As an adhesive for joining the waterproof sheet (3) and the joining piece (4), a solvent-type adhesive obtained by dissolving a small amount of vinyl chloride resin in tetrahydrofuran was used. This resulted in an adhesive effect with excellent durability.

There is a waterproof sheet between the waterproof sheet (3) and the concrete wall surface (2) of the flat roof (1) to be waterproofed.
(3) To protect the cured sheet consisting of a polyethylene foam sheet and a composite sheet attached to it
(6) was interposed.

Next, a reinforcing fiber sheet made of glass cloth is applied to the entire surface of the irregularly shaped protrusion (7) and the wall surface (2) to be waterproof, such as a flat roof (1) around the irregularly shaped protrusion (7).
(10) (Cosmo Cloth 0808, trade name, manufactured by Sumitomo Chemical Co., Ltd.).

Then, a waterproof coating made of synthetic resin is applied to the surface of the reinforcing fiber sheet (10) at a coating amount of 2.0 kg / m ² (1.
(5 mm thick) to form a waterproofing layer (11) consisting of a reinforcing fiber sheet (10) and a synthetic resin waterproofing film impregnated therein. Here, as the synthetic resin waterproof coating, a solution obtained by dissolving a vinyl chloride resin in tetrahydrofuran was used.

The waterproof layer (11) around the irregularly shaped projection (7)
The bottom portion (11a) of the waterproof sheet (3) was joined to the upper surface of the end portion (3a) of the waterproof sheet (3) by the adhesive force of the waterproof coating film itself formed from a viscous solution of a vinyl chloride resin dissolved in tetrahydrofuran.

According to the method of the present invention described above, the reinforcing fiber sheet is applied to the entire surface of the irregularly shaped projection (7) and the wall surface (2) to be waterproof such as a flat roof around the irregularly shaped projection (7). (1
(0), and the reinforcing fiber sheet (10) is coated with a synthetic resin waterproof paint made of a solution of soft vinyl chloride resin dissolved in tetrahydrofuran and impregnated, and the synthetic resin waterproof coating film is impregnated with the waterproofing film. Forming a layer (11), and a skirt portion of the waterproof layer (11) around the irregularly shaped protrusion (7).
(11a) is attached to the end (3) of a waterproof sheet (3) made of a soft polyvinyl chloride sheet by the adhesive force of the synthetic resin waterproof coating film itself.
It is bonded to the upper surface of a).

Therefore, according to the method of the present invention, the work of waterproofing the irregularly shaped projections such as the irregularly shaped projections (7) requires less labor than the conventional method, and is about one third of the conventional method. Work time is enough, and no skill is required for waterproofing work,
Waterproofing work can be performed easily and quickly, and the appearance after waterproofing is also excellent.

Particularly, in this embodiment, the waterproof layer (11)
The synthetic resin waterproof coating film constituting the above is a soft vinyl chloride resin coating film formed from a solution of a soft polyvinyl chloride resin dissolved in tetrahydrofuran, and the waterproof sheet (3) is made of a soft polyvinyl chloride sheet. Therefore, it has very good adhesion, waterproof layer (11) and waterproof sheet (3)
There is an advantage that the watertightness of the boundary with the end (3a) can be ensured.

As described above, if the synthetic resin waterproof coating film constituting the waterproof layer (11) and the waterproof sheet (3) are made of the same material, and they are made of the same thickness, the flat roof can be obtained.
(1) Durability of the entire waterproof construction part (durable period)
Are preferred because they can be the same.

However, the present invention is not limited to this.
The synthetic resin waterproof coating film and the waterproof sheet (3) constituting the above may be made of other materials.

[0036]

As described above, according to the present invention, in waterproofing a waterproof sheet-stretched flat roof or the like, in order to waterproof a deformed projection (accessory), first, a joining piece is attached to a wall portion to be waterproofed around the deformed projection. An end of a waterproof sheet fixed to a fixing tool and stretched on a wall surface to be waterproofed such as a flat roof other than the deformed projection is joined to the upper surface of the joining piece around the deformed projection. Then, on the entire surface of the deformed protrusion, and on the upper surface of the end of the waterproof sheet around the deformed protrusion,
A reinforcing fiber sheet is covered, a synthetic resin waterproof paint is applied to the fiber sheet and impregnated to form a waterproof layer made of synthetic resin waterproof coating impregnated fibers, and a skirt portion of the waterproof layer around the irregularly shaped protrusion. Is bonded to the upper surface of the end portion of the waterproof sheet by the adhesive force of the synthetic resin waterproof coating film itself.

As described above, according to the method of the present invention, a portion having a small expansion and contraction (movement), such as a deformed protrusion (a stand), is waterproofed by a coating film, and is applied to a normal portion other than the deformed protrusion. Waterproof sheet is so-called insulation method (floating method)
And the boundary part is kept watertight. Therefore, compared to the conventional method, the work of waterproofing the irregularly shaped protruding portion is less troublesome and about one third of the conventional method. In addition to the time required for the work, the skill is not required for the waterproofing work, so that the waterproofing work can be performed easily and quickly, and the waterproofing cost is reduced.

Further, even when, for example, a movement such as expansion or contraction occurs at the irregularly shaped projection (mount), the waterproof layer made of the synthetic resin waterproof coating impregnated fiber may cover the surface of the irregularly shaped projection (mount). Since it is covered and is in a so-called floating state, the waterproof layer (11) does not break and can perform excellent waterproof construction.

Further, after waterproofing, corner patches as in the prior art do not appear and appear at the four corners of the irregularly shaped projection, and the effect is that the appearance is excellent.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a flat roof showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flat roof 2 Wall surface to be waterproofed 3 Waterproof sheet 3a End of waterproof sheet 4 Joint piece 5 Fixture 7 Irregular projecting part (stand) 10 Fiber sheet for reinforcement 11 Waterproof layer 11a Hem part of waterproof layer

Claims (1)

(57) [Claims] [Claim 1] In a waterproof sheet stretched roof (1) and the like,
A method of waterproofing the irregular projection (7), wherein the irregular projection (7) is waterproofed.
A joint piece on the wall (2) to be waterproof around (7)
(4) is fixed with the fixture (5), and the end (3a) of the waterproof sheet (3) stretched on the wall (2) to be waterproof, such as the flat roof (1) other than the irregular projection (7) ) Is bonded to the upper surface of the joint piece (4) around the irregularly shaped protrusion (7), and the waterproof sheet around the entire irregularly shaped protrusion (7) and around the irregularly shaped protrusion (7)
The upper surface of the end (3a) of (3) is covered with a reinforcing fiber sheet (10), and the fiber sheet (10) is coated with a synthetic resin waterproof paint and impregnated. Become waterproof layer
(11), and the skirt (11a) of the waterproof layer (11) around the irregularly shaped protrusion (7) is attached to the end (3a) of the waterproof sheet (3) by the adhesive force of the synthetic resin waterproof coating film itself. ) A waterproofing method for irregularly shaped protrusions on a flat roof with a waterproof sheet, characterized by being bonded to the upper surface of the waterproofing sheet.