JP3979734B2 - Balcony waterproof structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof structure for a balcony suitable for preventing water leakage due to a junction or breakage of a rain gutter body provided on a balcony.
[0002]
[Prior art]
FIG. 12 shows a general structure of a conventional balcony 7a. A girder 12 is provided at the extended end of the beam 11 disposed overhanging from the girder 10 provided with a building wall 9 made of gypsum board or the like, and a balcony handrail wall 13 is erected on the girder 12. A primary waterproof structure 15 that forms a balcony floor is disposed on the beam 11 via a joist 14, and a rain gutter groove 8 is formed in the vicinity of the balcony handrail wall 13. As shown in the figure, the rain gutter groove 8 is provided with a primary waterproof structure 45 made of a PVC steel plate.
[0003]
[Problems to be solved by the invention]
The primary waterproof structure 15 that forms the balcony floor is composed of four layers in the illustrated example, specifically, a floor base plate 15a made of plywood or the like at the bottom, an asphalt roofing 15b thereon, and a PVC steel plate thereon. The floor board 15c made of is polymerized, and the floor finishing board 15d is arranged on the top. Note that a caulking material (not shown) is applied to the overlapping portion of the primary waterproof structure 15 forming the balcony floor and the primary prevention structure 45 of the rain gutter groove 8 to prevent water leakage from that portion. As the primary waterproof structure 45 of the groove 8, a metal plate such as aluminum, zinc, copper, stainless steel or iron, a synthetic resin plate such as a bent product, a vinyl chloride resin plate, or a molded product thereof is used in addition to a PVC steel plate. ing.
However, the metal plate, the linear expansion coefficient of 1 to 2 × 10 ^{over 6} / ° C., a tensile strength of 1000~5000kg / cm ^2, elongation percentage is 20 to 40, and waterproof purpose repetition of expansion and contraction over time There is a problem that the caulking joint is broken and rainwater leaks into the building. Also, in the case of the vinyl chloride resin material or this molded product, the heat change is large, and the caulking material at the joining portion is often peeled off, which causes a problem of water leakage.
[0004]
[Means for Solving the Problems]
Waterproof structure of the balcony of the invention to solve the above problems, there on the lower surface of the primary waterproof rain gutter groove formed on the balcony waterproof balcony providing a secondary waterproof structure consisting of high polymer sheet The secondary waterproof structure is composed of a secondary waterproof sheet main body formed by folding and a drain outlet that is in close contact with the secondary waterproof sheet main body via a fixed sealing material. What used the thing which temporarily attached the feeding sheet on the bottom part of this.
The balcony waterproof structure according to claim 2 is characterized in that the polymer polymer sheet is an unstretched polypropylene sheet.
The waterproof structure of the balcony according to claim 3 is characterized in that the sealing material is non-vulcanized butyl rubber.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the waterproof structure of the balcony of the present invention is characterized in that a secondary waterproof structure made of a polymer sheet is provided on the lower surface of the primary waterproof structure of the gutter groove formed on the balcony.
The balcony waterproof structure according to claim 2 is characterized in that the polymer polymer sheet is an unstretched polypropylene sheet.
Further, the waterproof structure of the balcony according to claim 3 is such that the secondary waterproof structure is closely attached to the secondary waterproof sheet main body formed by folding and a fixed sealing material to the secondary waterproof sheet main body. It is characterized by comprising a drain outlet.
The waterproof structure of the balcony according to claim 4 is characterized in that the sealing material is non-vulcanized butyl rubber.
[0006]
By installing a secondary waterproof structure of polymer polymer sheet on the bottom surface of the primary waterproof structure of the rain gutter on the balcony, even if there is water leakage in the primary waterproof structure, it will be blocked by the secondary waterproof structure, Leakage is prevented. In addition, CPP has an amorphous molecular structure, good dimensional stability, and only bends are bent so that it can be easily formed into a box shape by folding and a box without a break can be formed. The secondary waterproof structure is formed of a secondary waterproof sheet main body portion and a drain port portion that are folded and formed into an integral structure, and drains water by bringing the drain port portion into close contact with a balcony handrail wall or the like. The overlapping part of the main body of the secondary waterproof sheet and the drain port part is joined with a butyl rubber sealing material that is compatible with CPP, and the seal is perfected. The joint part between the drain port part and the balcony handrail wall is a caulking material. Is sealed. Moreover, by providing a feed sheet at the drain port portion, damage to the secondary waterproof structure due to the end surface on the drain port side of the primary waterproof structure is prevented.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the waterproof structure of a balcony according to the present invention will be described in detail with reference to the drawings.
Prior to the description of the structure of each part, the features of the CPP will be described. This CPP generally provides sufficient strength even when formed on a thin plate material of 0.4 to 0.6 mm, has an amorphous molecular structure, good dimensional stability, and only bends and folds at the folds. It can be formed into a box shape by forming, and has excellent shape retention. For this reason, a 5-6 m long thing can be rounded and packed compactly, and inventory and a transportation man-hour can be reduced. And, when used, when it is taken out from the case, it returns to its original straight shape, so there is no construction error. Moreover, it is nonpolar and has a good hydrophobicity, and the water becomes a ball and rolls on the inclined surface. Also, there is no slip resistance, and even if there is some error in the size of the groundwork, it can act like a rain gutter slipper and can quickly attach the rain gutter to the ground groove, causing deformation due to rain gutter construction. Hateful. Moreover, if it is a polypropylene material 90 mol% or more, it will have 170 degreeC heat resistance, and it is excellent also in chemical resistance and durability. In addition, it is lightweight with a specific gravity of 0.9, and it is semi-rigid, so there is no worry of injury, and it is suitable from the PL method. In addition, when non-vulcanized butyl rubber is used as a sealant between CPPs, CPP and non-vulcanized butyl rubber are olefins (linear polymers) formed by combinations of three and four carbons, respectively, due to the molecular structure. The compatibility is extremely good, and the resin material and oil used are the same, and the bondability is very good.
[0008]
FIG. 1 shows a case where the waterproof structure of a balcony of the present invention is applied to a rain gutter groove 8 portion of a balcony 7 such as a building. In addition, although the secondary waterproof structure 1 of this example employs CPP, it is not limited to this. A girder 12 is provided at the extended end of the beam 11 disposed overhanging from the girder 10 provided with a building wall 9 made of gypsum board or the like, and a balcony handrail wall 13 is erected on the girder 12. In addition, an opening 13a through which a drain port 3 (FIG. 2) described later can pass is formed below the balcony handrail wall 13. A primary waterproof structure 15 that forms a balcony floor is disposed on the beam 11 via a joist 14, and a rain gutter groove 8 is formed in the vicinity of the balcony handrail wall 13.
[0009]
In the rain gutter groove 8, a primary waterproof structure 45 made of a vinyl chloride steel plate corresponding to the rain gutter shape is disposed. The secondary waterproof structure 1 of this example is interposed between the lower surface of the primary waterproof structure 45 and the beam 11 that contacts the bottom of the rain gutter groove 8, and the longitudinal direction of the rain gutter groove 8 is the same as the primary waterproof structure 15. And the drain outlet 3 is formed on the balcony handrail wall 13 side. The primary waterproof structure 15 forming the balcony floor is made of a polymerized floor base plate 15a, asphalt roofing 15b, floor plate 15c, and floor finishing plate 5d.
[0010]
As shown in FIGS. 2 and 3, the secondary waterproof structure 1 includes a secondary waterproof sheet main body 2 and a drain port 3 fixed to the secondary waterproof sheet main body 2. The secondary waterproof sheet main body 2 is formed by bending as shown in FIG. 4, and both ends thereof are folded back and closed as shown in FIGS. That is, it is formed of an elongated box-shaped member having an U-shaped cross section that is opened only on the upper side of the secondary waterproof sheet main body 2 and the periphery thereof is surrounded by the wall 16. The reason why the cross-sectional shape is bent in two steps as shown in Fig. 4 is to improve the strength, absorb the tolerance of rain gutter and ground groove dimensions, and centralize the rainwater. It is not limited to. Further, an opening 17 as shown in FIG. 6 is formed on one end side of the secondary waterproof sheet main body 2 close to the drain outlet side, and a part of the peripheral wall 16 corresponding to the opening 17 is formed in the opening 17. An extension piece 18 having the bottom 19 extended without bending is formed to be flush with the bottom 19 of the secondary waterproof sheet main body 2.
[0011]
Next, a method for forming the secondary waterproof sheet main body 2 will be briefly described. First, as shown in FIG. 10, a CPP flat plate is prepared, and a folding line 20 such as a dotted line is put in a portion that needs to be folded in advance. Next, as shown in FIG. 11, each part is bent along each fold line 20. In particular, the end portion is bent in order and has a box shape without a cut end. As described above, the end portion is bent at a right angle as shown in FIGS. 6 and 7, and the bottom 19 is formed in the shape shown in FIG.
[0012]
Next, the drain port part 3 fixed to the secondary waterproof sheet main body part 2 formed by bending as described above will be described. The drain port portion 3 is fixed to the drain port lower side portion 4 directly fixed to the opening portion 17 of the secondary waterproof sheet main body portion 2 as shown in FIG. 6, and the drain port lower side portion 4 as shown in FIG. And a drain port upper side portion 5 that forms a drain port 6.
[0013]
The drain port lower side portion 4 includes a bottom portion 21, side portions 22 and 22 that rise from both sides thereof, and a flange 23 that is folded back at the end portion of the bottom portion 21 on the drain port side. A flange 24 is formed on the side 22 of the bottom 21 opposite to the flange 23 on the side opposite to the flange 23. Further, the feeding sheet 25 is temporarily fixed on the bottom portion 21 as will be described in detail later.
[0014]
The drain port upper side portion 5 includes an upper plate 26, side plates 27 and 27 that are bent on both sides thereof, a cantilever piece 28 that extends by connecting a base end to the upper plate 26, and the like. And the flange 29 and the flanges 30 and 30 are bend | folded and formed in the discharge port side of the side plates 27 and 27, respectively.
[0015]
Next, a method for joining the secondary waterproof sheet main body 2 and the drain port 3 will be described. First, as shown in FIG. 7, the flange portions 24, 24 of the drain outlet lower side portion 4 are bonded to the walls 16, 16 on both sides of the opening portion 17 of the secondary waterproof sheet main body portion 2 and the bottom portion 21 is opened to the opening portion 17. Adhere to the extension piece 18 on the side. As the adhesive, non-vulcanized butyl rubber 31 is used. Further, the portion of the minute gap generated around the bonded portion is closed by the non-vulcanized butyl rubber 31. Next, as shown in FIG. 7, the side plates 27, 27 of the drain port upper side part 5 are superposed on the side parts 22, 22 of the drain port lower side part 4, and are bonded by non-vulcanized butyl rubber 31. As described above, the drain port 3 is formed as shown in FIG. In this case, a portion surrounded by the bottom portion 21, the side portions 22 and 22 of the drain port lower side portion 4 and the upper plate 26 and the side plate 27 of the drain port upper side portion 5 forms the drain port 6.
[0016]
The secondary waterproof structure 1 having the above structure is inserted into the rain gutter groove 8 as shown in FIG.
The secondary waterproof structure 1 made of CPP is rolled into a corrugated cardboard case and stored compactly. When the secondary waterproof structure 1 is spread in use, it is restored to the shape shown in FIG.
The secondary waterproof sheet main body 2 of the secondary waterproof structure 1 restored in this way is interposed between the lower surface of the primary waterproof structure 15 and the upper surface of the beam 11 placed thereon. On the other hand, the drain port 3 is inserted into an opening hole 13a drilled below the balcony handrail wall 13, and is joined to the inner surface side of the balcony handrail wall 13 in a watertight manner by caulking using a flange 28a of a cantilever piece 28. At the same time, the outer surface of the balcony handrail wall 13 is watertightly joined by caulking using flanges 23, 29, and 30 that protrude from the outside of the balcony handrail wall 13.
As described above, the water in the secondary waterproof structure 1 flows through the bottom 19 of the secondary waterproof sheet body 2 and is drained to the outside from the drain 6 of the drain 3.
[0017]
As shown in FIG. 8, the feed sheet 25 is fed to the side surface (thickness 0.5 mm) of the non-vulcanized butyl rubber 31 to which the extension piece 18 of the main body 2 is bonded on the bottom 21 of the drain port 3. These are temporarily attached by abutting and joining the side surfaces. On the other hand, the end face 45a on the drain outlet 6 side of the primary waterproof structure 45 is often disposed downward, and when the primary waterproof structure 45 is inserted on the upper surface of the secondary waterproof structure 1, the feed sheet 25 is not provided. The end face 45a of the primary waterproof structure 45 contacts the bottom 21 of the drain port 3 of the secondary waterproof structure 1 to cause damage, or the flange 23 and the non-vulcanized butyl rubber 31 are destroyed, causing water leakage. become. However, by temporarily fixing the feed sheet 25 to the bottom portion 21 as described above, as shown in FIG. 9, when the primary waterproof structure 45 is set at a predetermined position, the end face 45a of the primary waterproof structure 45 is fed to the feed sheet. In this case, when a force of 500 g / 200 mm width or more is applied, the feed sheet 25 comes off from the side surface of the non-vulcanized butyl rubber 31 and is fed outward by the end face 45a. In this way, the bottom portion 21 of the drain outlet 3 is protected by the feed sheet 25, and the primary waterproof structure 45 can be attached to the upper surface without damaging the secondary waterproof structure 1.
As described above, in the present invention, it is not necessary to join the primary waterproof structure (gutter) 45 to the balcony handrail wall 13 by using the caulking material, so that the caulking material is destroyed by causing the conventional water leakage. Caulking joining can be avoided.
Moreover, since the secondary waterproof structure 1 by CPP has little slip resistance, it does not resist expansion and contraction of the primary waterproof structure (rain gutter) 45, and therefore the primary waterproof structure 45 is not likely to be damaged.
[0018]
In this example, CPP is used as the polymer sheet. However, the present invention is not limited to this, and other polymer sheets may be used. In addition, although non-vulcanized butyl rubber that is compatible with CPP is used as a bonding material for a bonding portion between CPPs, the present invention is not limited to this, and other bonding materials that do not peel or break due to a temperature difference are also used. .
[0019]
【The invention's effect】
1) According to the waterproof structure of the balcony of the present invention, the primary waterproof structure can freely expand and contract by providing a secondary waterproof structure made of a polymer sheet on the lower surface of the primary waterproof structure, so that the initial waterproof property is long-lasting. It is possible to prevent water leaking from the primary waterproof structure or overflowing rainwater from leaking into the building.
2) According to the waterproof structure of the balcony of the present invention, by using CPP as the polymer sheet, secondary leakage accidents can be completely prevented and workability can be improved.
3) According to the waterproof structure of the balcony of the present invention, the secondary waterproof structure includes a secondary waterproof sheet main body disposed along the gutter groove, and drains water into the secondary waterproof sheet main body. Consisting of a drain outlet leading to the mouth side, drainage can be ensured and smoothed.
4) According to the waterproof structure of the balcony of the present invention, the use of non-vulcanized butyl rubber as the regular sealing material can improve the bonding property between the CPPs, and can complete the seal.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a balcony in which a secondary waterproof structure of the present invention is arranged.
FIG. 2 is a top view of the secondary waterproof structure of the present invention.
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a perspective view of a secondary waterproof sheet main body portion of the secondary waterproof structure of the present invention.
FIG. 5 is a partial perspective view showing a coupling state of the secondary waterproof sheet main body portion and the drain port portion of the present invention.
FIG. 6 is a partial perspective view showing the structure of the periphery of the opening of the main body of the secondary waterproof sheet of the present invention and the lower side of the drain outlet fixed to the opening.
FIG. 7 is a partial perspective view showing a structure of a drain port lower side portion fixed to the secondary waterproof sheet main body of the present invention and a drain port upper side portion joined thereto.
FIG. 8 is a partial cross-sectional view showing a feed sheet provided in the drain port portion of the present invention.
FIG. 9 is a partial perspective view showing a moving form by the primary waterproof structure of the feeding sheet in FIG.
FIG. 10 is a partial perspective view showing the engraved state of the fold line before the folding of the secondary waterproof sheet body in the secondary waterproof structure of the present invention.
FIG. 11 is a partial perspective view showing a form in the middle of bending of the secondary waterproof sheet main body folded from the state of FIG. 10;
FIG. 12 is a transverse sectional view showing a waterproof structure of a conventional balcony.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Secondary waterproof structure 2 Secondary waterproof sheet body part 3 Drain port part 4 Drain port lower side part 5 Drain port upper side part 6 Drain port 7 Balcony 8 Gutter groove 9 Building wall 10 Girder 11 Beam 12 Girder 13 Balcony handrail Wall 13a Opening hole 14 joist 15 Primary waterproof structure (balcony floor)
15a floor base plate 15b asphalt roofing 15c floor plate 15d floor finishing plate 16 wall 17 opening 18 extension piece 19 bottom 20 folding line 21 bottom 22 side 23 flange 24 flange 25 feed sheet 26 top plate 27 side plate 28 cantilever 28a flange 29 Flange 30 Flange 31 Non-vulcanized butyl rubber 32 End face 45 Primary waterproof structure (gutter for rain gutter)
45a end face

Claims (3)

A waterproof structure for a balcony in which a secondary waterproof structure made of a polymer sheet is provided on the lower surface of a primary waterproof structure for rain gutters formed on a balcony, wherein the secondary waterproof structure is a secondary structure formed by folding. It consists of a waterproof sheet main body part and a drainage port part that is in close contact with the secondary waterproof sheet main body part via a fixed sealing material, and using a temporary sheet attached on the bottom of the drainage port part The waterproof structure of the featured balcony.   The waterproof structure for a balcony according to claim 1, wherein the polymer sheet is an unstretched polypropylene sheet. The waterproof structure for a balcony according to claim 2 , wherein the fixed sealing material is non-vulcanized butyl rubber.

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