JP3761549B2 - Waterproof sheet smooth laying structure and outer edge fixing member of waterproof sheet - Google Patents

Description

  The present invention relates to a waterproof sheet laying structure in which a waterproof sheet is laid on the rooftop of a building, and more specifically, a waterproof sheet smooth laying structure in which a waterproof sheet can be laid so that there is no step in the waterproof sheet laid on the rooftop and used therein. The present invention relates to an outer edge fixing member of a waterproof sheet.

When a waterproof sheet is laid on the roof of a building, a strip-shaped waterproof sheet having a thickness of about 1.2 mm to 2.5 mm and a width of 1000 mm or 1200 mm is laid on the floor surface of the concrete floor. In the sheet laying method, the width joint and longitudinal joint portion of the waterproof sheet and the waterproof sheet are lap joints. This joint part is welded by heat or a welding agent. This conventional lap joint method has been widely used since the waterproof sheet can be laid relatively easily and is advantageous in terms of construction cost.
JP-A-11-172649 JP-A-10-152948 Japanese Patent Laid-Open No. 10-081856

  However, the recent needs for waterproofing of buildings are diversifying, and it has become an era where residential buildings are required to have a useful life of 20 to 50 years. For this reason, it has become necessary to extend the useful life of buildings. In particular, durability is also required for rooftops of damaged and cheap buildings.

  In general, the reason for shortening the service life of the waterproof sheet on the roof of a building is that the waterproof sheet deteriorates due to rainwater collecting on the waterproof sheet, or rainwater enters from the width or longitudinal joint of the waterproof sheet. This is a point that the welded part is peeled off.

  Furthermore, the rooftop of the building may be used as a community plaza or as an outdoor playground for nursing homes, a department store or a supermarket. However, when used as a plaza, the level difference of the conventional waterproof sheet causes various problems. If there are even steps on the roof, the elderly and children may trip and be injured. In addition, dirt is generated after the puddle, and it is slippery when rainwater is accumulated. Especially, it is extremely dangerous if the puddle freezes in winter, and it will be difficult for customers to complain. Is difficult to use.

  As described above, it can be clearly understood that the formation of a step at the boundary portion of the waterproof sheet causes various adverse effects. However, when trying to prevent the formation of a step at the boundary portion of the waterproof sheet, If there is no step in the end portion, rainwater accumulates on the outer peripheral edge of the roof, resulting in the inconvenience as described above. Conventionally, there has been no technology for flattening the end portion of the waterproof sheet by removing a step.

  The present invention has been made to solve such problems, eliminates the level difference between the overlapping portions of the waterproof sheets, dramatically improves the useful life of the waterproof sheets, and improves the effective use and safety of the roof. The purpose of the present invention is to provide a waterproof sheet smooth laying structure and a waterproof sheet outer edge fixing member used therefor, which are not only widened for rooftop use but also relatively inexpensive and easy to construct.

  In order to solve the above-mentioned problems, the waterproof sheet smooth laying structure of the present invention is provided with a weld band on the surface of the underlying concrete corresponding to the boundary portion of the waterproof sheet, and on the surface of the underlying concrete excluding the portion where the weld band is provided. Is a waterproof sheet smooth laying structure in which a waterproof sheet is laid on the undersheet so that the boundary of the waterproof sheet comes to the weld band, and a step having the same thickness as the weld band is specified. The outer edge fixing member formed at intervals is installed on the outer periphery of the roof at the end position of the welding band, the end of the welding band is arranged on the stepped portion of the outer edge fixing member, and the surface of the welding band and the outer edge fixing member faces each other. It is characterized by having become one.

  According to the above configuration, since the welding band and the surface of the outer edge fixing member are configured to be flush with each other, when the waterproof sheet is laid, not only the central portion of the roof but also the step at the outer peripheral edge portion is completely eliminated. be able to.

  Moreover, the waterproof sheet smooth laying structure of the present invention uses a synthetic resin-coated metal plate for the outer edge fixing member, and the outer edge fixing member has the same width as the welding band and a depth that is flush with the surface of the welding band. The step portions are formed at predetermined intervals. By forming stepped portions having a depth so as to be flush with the surface of the welding band at a predetermined interval, the outer peripheral edge portion of the roof can be smoothly laid with a waterproof sheet.

  Further, the waterproof sheet smooth laying structure of the present invention is composed of an upper layer part and a lower layer part capable of separating the weld band, and the upper layer part has the same thickness as the stepped part formed on the outer edge fixing member. The thickness is the same as the thickness of the outer edge fixing member, and the lower layer portion at the end of the weld band disposed on the outer edge fixing member is separated and cut off. By comprising the upper layer part and lower layer part which can isolate | separate a welding band, the edge part process of a welding band can be easily performed at a construction site.

  Moreover, the waterproof laying smooth laying structure of the present invention has the same thickness as the height of the outer edge fixing member, and the bottom of the end of the welding band arranged on the outer edge fixing member is flattened by the thickness of the outer edge fixing member. It is characterized by having a configuration for cutting. By adopting a configuration that cuts the lower part of the end of the weld band placed on the outer edge fixing member flatly by the thickness of the outer edge fixing member, it is possible to easily process the end of the weld band at the construction site by using a cutting tool. It is possible to perform construction corresponding to various types of outer edge fixing members.

  Further, the outer edge fixing member of the waterproof sheet of the present invention is the same width as the weld band at a predetermined interval on the synthetic resin-coated metal plate in which the surface of the metal plate is coated with the synthetic resin so as to be flush with the surface of the weld band. A plurality of step portions having a certain depth are formed in accordance with the width of the waterproof sheet. If this outer edge fixing member is used, a waterproof sheet can be smoothly laid also on the outer periphery of the roof.

  Further, the outer edge fixing member of the waterproof sheet of the present invention uses a strip-shaped plate material for the metal plate, and the stepped portion has the same width as the welding band and is bent to a depth that is flush with the surface of the welding band. It is characterized by being.

  Further, the outer edge fixing member of the waterproof sheet of the present invention is characterized in that a step portion is formed on a long metal plate by forming a recess having the same width as the welding band and being flush with the surface of the welding band. And

  Since the waterproof sheet smooth laying structure of the present invention has the above-described configuration, the useful life of the waterproof sheet can be dramatically improved, and the rooftop can be effectively used and improved in safety. Moreover, it is possible to provide a waterproof sheet smooth laying structure that is relatively inexpensive and easy to construct.

[Embodiment 1]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a rooftop of a building laid with a waterproof sheet, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a partially enlarged view of FIG. It is sectional drawing.

  As shown in FIG. 1, the outer peripheral edge of the rooftop 1 of the building is surrounded by a parapet 2, and the thickness is about 1. in the longitudinal direction of the ground concrete 3 floor surface of the rooftop 1 of the building surrounded by the parapet 2. A waterproof sheet 4 having a length of about 2 mm to 2.5 mm, a width of 1000 mm or 1200 mm, and a length of 20 mm is provided. The waterproof joint 4 of the adjacent waterproof sheets 4 and the boundary part 6 of the longitudinal joint of the waterproof sheet 4 are not joined by the overlapping joint method as in the conventional laying method. A band-like weld band 7 is laid on the boundary portion 6 of the longitudinal joint, and the boundary portion of the waterproof sheet 4 is welded to the weld band 7. In the boundary portion 5 of the width joint of the waterproof sheet 4, the weld band is joined by weld bands of various shapes such as I type, H type, and T type, and the weld band 7 according to the shape of the boundary portion of the waterproof sheet 4. Is used.

  The outer edge fixing member 8 on the end side as shown in FIG. 5 is a base concrete along the inner peripheral edge of the short side of the parapet 2 where both ends of the waterproof sheet 4 are located and in contact with the inner wall of the parapet 2. 3 is fixed by screws or the like. The outer edge fixing member 8 on the end side is provided to weld and fix the end of the waterproof sheet 4, and is a synthetic resin-coated metal plate in which the surface of the metal plate 8a is covered with the synthetic resin 8b. As the synthetic resin 8b, a thermoplastic resin such as polyvinyl chloride, polyethylene, polypropylene, ABS resin, or polystyrene is used, but the material is not limited to these resins. However, polyvinyl chloride is relatively easy to use. As a specific structure, as shown in FIG. 6, a through-hole 8c is formed at a predetermined position of a metal plate (steel plate) 8a and a vinyl chloride resin or the like is coated on the outer surface to form a vinyl chloride coated steel plate. Resin is filled into the through-hole 8c from the back surface, and the resin portion 8d of the through-hole 8c is connected to the resin layer on the front surface and the back surface to increase durability against peeling of the resin layer.

  If the material of the metal plate body 8a is a rigid metal, it is not necessary to be a steel plate, and any material such as aluminum or stainless steel plate may be used. The outer edge fixing member 8 has a thickness of about 1.5 mm to 2.0 mm.

    The outer edge fixing member 8 on the end side is formed with a stepped portion 8e for bending the end of the welding band 7 at a predetermined interval. The distance between the stepped portion 8e and the stepped portion 8e is determined by the width of the waterproof sheet 4, and the distance between the stepped portion 8e and the stepped portion 8e is determined so that both side edges of the waterproof sheet 4 are located at the center of the stepped portion 8e. . Specifically, the waterproof sheet 4 generally has a thickness of 1000 mm or 1200 mm, and there are 1820 mm as a special application. Therefore, the interval between the stepped portions 8e is determined according to the width of the waterproof sheet 4 to be laid.

    The width of the stepped portion 8e is formed to have the same width W of about 100 mm to 150 mm as the welded band 7 because the end of the welded band 7 is fitted. Further, the depth D of the stepped portion 8e is normally 1.2 mm to 2.0 mm, and the total of the depth D and the thickness of the outer edge fixing member 8 of 1.5 mm to 2.0 mm is the thickness of the weld zone 7. And the same. In this way, by making the sum of the depth D of the stepped portion 8e and the thickness of the outer edge fixing member 8 the same as that of the welded body 7, the welded body 7 and the upper surface of the outer edge fixing member 8 are formed as described later. It becomes flush and the steps are completely eliminated.

    The outer edge fixing member 8 is firmly fixed to the floor surface of the ground concrete 3 by an anchor plug (not shown) with a stainless steel screw 9 or the like along the parapet 2. A through hole 8f is formed at the center of the stepped portion 8e, and a stainless steel screw 9 is inserted into the through hole 8f and fixed by an anchor plug. When the synthetic resin-coated metal plate is made of iron, the through hole 8f through which the screw 9 is inserted is also fixed to the outer edge by covering the through hole 8f with the synthetic resin so that the steel plate 8a is not exposed to air and rusted. It is preferable to improve the durability of the member 8.

    As shown in FIG. 7, the welding band 7 is composed of a separable upper layer portion 7 a and a lower layer portion 7 b, and the thickness of the upper layer portion 7 a is the depth of the stepped portion 8 e formed in the outer edge fixing member 8. D is the same thickness as D, the lower layer portion 7b is the same thickness as the outer edge fixing member 8 on the end side, and the lower layer portion 7b at the end of the welding band 7 arranged on the outer edge fixing member 8 is separated and cut off. Thus, the surfaces of the welding band 7 and the outer edge fixing member 8 are flush with each other.

    If the upper layer portion 7a and the lower layer portion 7b of the welding band 7 are joined by a weak adhesive that is peeled off by a fingertip, the lower layer portion 7b is easily peeled and excised at the construction site as described above. The surface of the fixing member 8 can be flush. As a specific example of the welding band 7, the upper layer portion 7a and the lower layer portion 7b are completely separated, and adhesive paper is applied to both surfaces of the lower layer portion 7b, and release paper (not shown) is pasted together, The release paper is peeled off at the construction site, and one side is attached to the back surface of the upper layer part 7a, and the other side is attached to the foundation concrete 3.

    As yet another example, the upper layer portion 7a and the lower layer portion 7b are bonded together in advance with an adhesive, the adhesive is applied to the back surface of the lower layer portion 7b, and the release paper is bonded together, and the lower layer corresponding to the outer edge fixing member 8 at the construction site. If the part 7b is peeled off and excised, and the release paper is peeled off and attached to the base concrete 3, the work efficiency can be improved.

  The welding band 7 is made of vinyl chloride resin or olefin resin such as polyethylene (PE), polypropylene (PP), ethylene propylene diene monomer (EPDM), or the like. Of course, it goes without saying that the weld band 7 is not limited to such a material.

  The outer edge fixing member 10 on the side portion side shown in FIG. 4 is attached to the foundation concrete 3 along the inner peripheral edge of the parapet 2 where the outer edge of the outermost waterproof sheet 4 is located and in contact with the inner wall of the parapet 2. It is fixed with screws or the like. The outer edge fixing member 10 on the side portion side is also provided for welding and fixing the outermost portion of the waterproof sheet 4 and is a synthetic resin-coated metal plate having the same configuration as the outer edge fixing member 8 on the end portion side. The outer edge fixing member 10 on the side portion side has the same thickness as the welding band 7 and the undersheet 11 described below. However, the step portion 8e is not required, and thus the step portion 8e is not formed and is flat. It is a long plate.

    An undersheet 11 made of foamed polyethylene or the like is laid on the floor surface of the ground concrete 3 between the weld band 7 and the weld band 7. The undersheet 11 has the same thickness as the welding band 7, the end-side outer edge fixing member 8, and the side-side outer edge fixing member 10, and the surfaces of these members are flush with each other. By doing in this way, a level | step difference can be eliminated completely when the waterproof sheet 4 is laid.

    Further, the waterproof sheet 4 is laid on the entire surface of the undersheet 11 by an insulating method. Naturally, the boundary portions 5 and 6 of the waterproof sheet 4 are placed on the weld band 7. The waterproof sheet 4 is welded to the surface of the waterproof sheet fixing member 12 fixed to the foundation concrete 3 with a welding agent or heat. A rising sheet 13 is attached to the inner peripheral surface of the parapet 2. The lower end portion of the rising sheet 13 is bent into an L shape, and the tip end portion is closed with a welding rod or an adhesive 14.

Hereinafter, details of the waterproof sheet laying method of the present invention will be described with reference to the drawings.
Before laying the waterproof sheet 4 or the undersheet 11, the floor surface of the base concrete 3 and the base of the parapet 2 are adjusted. Therefore, the floor surface of the base concrete 3 and the protrusions and deposits of the parapet 2 are removed, and the portions with extreme irregularities are flattened. In addition, high-pressure cleaning is performed according to the dirt condition, and cleaning is performed within the construction range. And after cleaning, the floor and the parapet 2 are dried and cured for 2 to 3 days.

  In the case of the bonding method in which the undersheet is bonded to the base concrete using an adhesive, it is necessary to completely dry the floor surface, the parapet, etc., but the waterproof sheet fixing member 12 is used as in the present embodiment. In the case of the insulation method, it is not necessary to dry completely, and the base moisture content may be 15% or less.

  As described above, after the base adjustment is completed, the exact dimension of the floor surface of the rooftop 1 is measured, and the standard of the waterproof sheet 4 to be used is determined. The actual dimensions of the rooftop 1 of the building vary widely, and the dimensions of the waterproof sheet 4 are not necessarily unified. For example, assuming that the long side of the rooftop 1 in FIG. 1 is 25 m, and the standard size of the waterproof sheet 4 is 20 m, the waterproof sheet 4 is insufficient by 5 m, and if the 25 m waterproof sheet 4 is laid on this 5 m portion, the waterproof sheet 4 is 20 m. The fraction comes out. For this reason, if this fractional waterproof sheet 4 is used economically and resource-saving effectively, it will be necessary to make a joint. In this respect, the present invention can effectively use the waterproof sheet 4 with a fraction by using the welding band 7.

  Before the outer edge fixing members 8 and 10 are attached, the surface of the foundation concrete 3 is marked so that the center of the weld band 7 comes to a position corresponding to the boundary between the waterproof sheet 4 and the waterproof sheet 4. The position of the waterproof sheet fixing member 12 is shifted during dimensioning so that it does not overlap the weld band 7.

  At the stage where marking is finished as described above, the outer edge fixing member 8 is fixed on the foundation concrete so that the center of the welded band 7 that has been marked as described above comes to the center of the stepped portion 8e of the outer edge fixing member 8. To do. When fixing the outer edge fixing member 8, as shown in FIG. 8A, the outer edge fixing member 8 is placed along the inner peripheral edge of the parapet 2 where the end portion side of the waterproof sheet 4 is located and in contact with the inner wall of the parapet 2 The outer edge fixing member 8 on the end side is fixed on the concrete 3 with an anchor plug using a stainless steel screw 9. At this time, an epoxy resin is injected into the anchor plug in order to eliminate the looseness of the screw 9 and increase the pull-out strength.

  As shown in FIG. 5, a step 15 e between the step 8 e and the step 8 e of the outer edge fixing member 8 is raised and a gap 15 is opened.

  Next, the outer edge fixing member 10 on the side portion side shown in FIG. 4 is grounded along the inner peripheral edge of the parapet 2 where the outer edge of the outermost waterproof sheet 4 is located and in contact with the inner wall of the parapet 2. Fix to concrete 3 with screws.

Although not shown, the four corners of the rooftop 1 are firmly fixed by connecting the outer edge fixing members on the end side and the side side with L-shaped connecting fittings.
Next, as shown in FIG. 8 (b), the release paper (not shown) of the lower layer portion 7b of the welding band 7 is peeled off and attached to the surface of the grounded foundation concrete 3 as described above. In the case of the welding band 7 to which such an adhesive is not applied, it is fixed with an adhesive. The welding band 7 is prepared in accordance with the shape of the boundary portions 5 and 6 of the waterproof sheet, such as a band shape, I type, H type, and T type, according to the boundary portion of the waterproof sheet 4. This welding band 7 is cut out from a single wide sheet and is factory-produced or processed on site. This welding band 7 is made of a sturdy material so that it can withstand the effects of expansion and contraction of the waterproof sheet 4 over a long period of time. Use and perform on-site construction carefully. In the weld band 7, a core material 16 may be embedded in the upper layer portion 7a. The core material 16 is a sheet material having the same width as the width of the weld band 7, and uses glass fiber, non-woven fabric, metal fiber, or the like. The core material 16 is used to reinforce the weld band 7 and can increase the tensile strength of the weld band 7.

As described above, the lower end portion 7b of the end portion of the weld band 7 is peeled off by the width of the outer edge fixing member 8 and cut off. And as shown in FIG. 7, the edge part of the welding band 7 is stuck to the level | step-difference part 8e.
At the stage where the welding band 7 has been installed, the undersheet 11 is laid on the surface of the ground concrete 3 excluding the welding band 7 as shown in FIG. The undersheet 11 does not need to be bonded to the entire surface of the base concrete 3 and may be bonded at an appropriate place.

  When the undersheet 11 has been laid, an installation hole for installing the waterproof sheet fixing member 12 is opened at a predetermined location of the undersheet 11. Then, after drilling a screw hole in the ground concrete 3 with an electric drill or the like, although not shown, an anchor plug is fixed, a waterproof sheet fixing member 12 is fitted into the installation hole, and a screw 17 is passed through the center hole of the fixing member 12. The sheet fixing member 12 is fixed by screwing firmly into the anchor plug of the foundation concrete 3. The waterproof sheet fixing member 12 and the undersheet 11 are not bonded or welded at all.

  As described above, at the stage where the undersheet 11 has been laid, the waterproof sheet 4 that has been cut in advance is laid on the entire roof surface as shown in FIGS. The waterproof sheet 4 is fixed to the foundation concrete 3 by the waterproof sheet fixing member 12 and the outer edge fixing members 8 and 10. The waterproof sheet 4 is fixed to the waterproof sheet fixing member 12 and the outer edge fixing members 8 and 10 by heat or a welding material. Further, the boundary portion 5 of the width joint and the boundary portion 6 of the longitudinal joint of the adjacent waterproof sheets 4 are welded to the welding band.

Finally, the rising sheet 13 is attached to the inner peripheral surface of the parapet 2 and the lower end is fixed with a welding rod or an adhesive 14.
The present invention can provide a low-cost and safe floor construction in which the waterproof sheet 4 serves both as a flooring material and waterproofing.
[Embodiment 2]
In the above embodiment, the welding band 7 is composed of two layers of the upper layer part 7a and the lower layer part 7b, and both layers are adhered with an adhesive. However, the present invention is not limited to such a welding band 7, for example, As shown in FIG. 9, the end of one weld band 18 may be ground by a grinding device by the thickness of the outer edge fixing member 8. In this case, it is possible to deal with the outer edge fixing member 8 having various thicknesses as long as there is a grinding device without requiring an adhesive or the like. Reference numeral 16 denotes a core material, which extends to the tip of the welding band 7.
[Embodiment 3]
Further, in the above embodiment, the outer edge fixing member 8 on the end portion side is formed by bending a thin plate to form the stepped portion 8e. However, the outer edge fixing member 8 is not limited to such a configuration, for example, as shown in FIG. In such a long metal plate, recesses 19 are formed at the same interval as the width of the waterproof sheet 4 to form a stepped portion, and this plate is covered with a synthetic resin such as polyvinyl chloride as described above. It may be a thing. The concave portion 19 has the same width as the welding band 7 and is formed to a depth that is flush with the surface of the welding band.

It is a top view of the rooftop which laid the waterproof sheet in Embodiment 1 of this invention. It is the sectional view on the AA line of FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is the BB sectional view taken on the line of FIG. It is a perspective view of the outer edge fixing member of the edge part side in Embodiment 1 of this invention. It is a fragmentary sectional view of FIG. It is a perspective view of the outer edge fixing member by the side of an edge part, and the edge part of a welding belt. It is a laying process figure of the waterproof sheet in Embodiment 1 of the present invention. It is edge part sectional drawing of the welding belt used for Embodiment 2 of this invention. It is sectional drawing of the outer edge fixing member by the side of the edge part used for Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Ground concrete 4 Waterproof sheet 5 Boundary part 6 Boundary part 7 Weld zone 7a Upper layer part 7b Lower layer part 8 Outer edge fixing member 8e Step part 10 Outer edge fixing member 11 Under sheet

Claims (7)

A weld zone is provided on the surface of the underlying concrete corresponding to the boundary of the waterproof sheet, and an undersheet having the same thickness as the weld zone is laid on the surface of the underlying concrete excluding the portion provided with the weld zone, and the boundary of the waterproof sheet is provided on the weld zone. A waterproof sheet smooth laying structure in which a waterproof sheet is laid on the undersheet so that
An outer edge fixing member in which stepped portions having the same thickness as the welding band are formed at predetermined intervals is installed on the outer periphery of the roof at the end position of the welding band, and the end of the welding band is arranged on the stepped portion of the outer edge fixing member. A waterproof sheet smooth laying structure in which the belt and the surface of the outer edge fixing member are flush with each other. A synthetic resin-coated metal plate is used for the outer edge fixing member, and the outer edge fixing member has the same width as the welding band and a stepped portion having a depth that is flush with the surface of the welding band. The waterproof sheet smooth laying structure according to claim 1. It consists of an upper layer part and a lower layer part that can separate the welding band, the thickness of the upper layer part is the same thickness as the stepped part formed on the outer edge fixing member, the lower layer part is the same thickness as the thickness of the outer edge fixing member, The waterproof sheet smooth laying structure according to claim 1, wherein a lower layer portion of an end portion of a welding band disposed on the outer edge fixing member is separated and cut off. The thickness of the welding band is the same as the height of the outer edge fixing member, and the lower part of the end of the welding band disposed on the outer edge fixing member is cut flat by the thickness of the outer edge fixing member. The waterproof sheet smooth laying structure according to 1. On the synthetic resin-coated metal plate with the surface of the metal plate covered with a synthetic resin, a step portion having the same width as the weld band at a predetermined interval and a depth that is flush with the surface of the weld band is set to the width of the waterproof sheet. An outer edge fixing member for a waterproof sheet, wherein a plurality of them are formed together. 6. The waterproof structure according to claim 5, wherein a strip-shaped plate material is used for the metal plate, and the stepped portion is bent to a depth that is the same width as the weld band and is flush with the surface of the weld band. A sheet outer edge fixing member. 6. The outer edge fixing member for a waterproof sheet according to claim 5, wherein a concave portion is formed on the metal plate so as to be flush with the surface of the welding band and having the same width as the welding band.

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