JPS6316744Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for waterproofing a roof slab penetration portion of a ventilation pipe used for drainage equipment in a building such as an apartment complex.

In the above drainage equipment, in order to prevent the water seal in the trap from being damaged due to pressure fluctuations in the drain pipe, and to ensure smooth flow in the drain pipe,
It is known to provide a ventilation pipe that communicates with a drainage pipe and lead its upper end to the rooftop to open it to the atmosphere.
Various waterproof structures have also been proposed. For example, in Fig. 4, a sheath pipe B that penetrates a roof slab A
The asphalt waterproof layer C on the roof slab surface is raised around the sheath pipe B, and the band-like body D is tied to prevent the layer C from peeling off due to thermal expansion and contraction or slipping down due to its own weight. On the other hand, sheath tube B
A ventilation pipe E is inserted through the pipe, a sealing material F is interposed between the two pipes, and a bend cap G is then placed over the pipe. On the other hand, in Fig. 5, the ventilation pipe E is directly attached to the roof slab A at the time of construction, and the waterproof layer C is raised around the ventilation pipe E, similarly tied with a band-like body D, and bent. It is crowned by Cap G.

With this type of structure, the presence of the bend cap G prevents dust from entering the ventilation pipe E.
And unless the waterproofing layer C is damaged, the roof slab A
This prevents rainwater from seeping in between the roof slab A and the sheath pipe B, or between the roof slab A and the ventilation pipe E.
On the other hand, the rainwater that blows into the bend cap G flows into the drain pipe through the ventilation pipe E, but when this rainwater is blown into the structure shown in Figure 4, due to reasons such as the improper finishing of the sealing material F, etc. Rainwater seeps in through the gap H between the sheath pipe B and the ventilation pipe E, and the structure shown in Figure 5 has the same drawback as the structure shown in Figure 4. It has been pointed out that rainwater seeps in through the gap (I) between the waterproof layer C and the sheath pipe B, and water leakage accidents in the building tend to progress over a long period of time or years.

In view of this, the present invention has been developed to effectively eliminate the occurrence of water leakage accidents by simply fitting a specially shaped waterproof cap onto the upper end of the ventilation pipe. waterproof layer,
a cylindrical cap body that is formed to stand up along the outer peripheral surface of a ventilation pipe that penetrates the roof slab and is open to the atmosphere, and whose inner diameter is approximately equal to the outer diameter of the rising portion of the waterproof layer; A hanging wall portion that bends inwardly and downwardly from its upper end in a substantially upside-down L-shape, and a hanging wall portion that bends from its lower end toward the inner circumferential surface of the cap body, and then extends inwardly and downwardly from its tip. A downward annular fitting groove is formed between the cap main body and the hanging wall portion, the width being wider than the double layer thickness of the ventilation pipe and the rising portion of the waterproof layer. A waterproof cap made of
At the open end of the ventilation pipe, the tip of the rising portion of the waterproof layer is inserted into the downward annular fitting groove, and the rising portion of the waterproof layer and the ventilation pipe are connected to the cap body and the upper end folded portion of the tapered draining portion. The waterproof cap is fitted in a sandwiched state, and is characterized in that a bend cap is provided on the upper part of the waterproof cap.

Hereinafter, the details of the present invention will be explained using an example structure shown in the drawings. FIG. 1 shows a waterproof cap 9. As shown in FIG. This waterproof cap 9 includes a cylindrical cap body 1 whose inner diameter is set to be approximately equal to the outer diameter of the rising part of an asphalt waterproof layer 2, which will be described later, and a cap body 1 that is bent inwardly and downwardly from its upper end in an approximately inverted L-shape. The loose hanging wall part 5 and the tapered draining part 8 which is bent from the lower end of the hanging wall part 5 toward the inner circumferential surface 6 of the cap main body and then folded back inwardly and downwardly from its tip. A downward annular fitting groove 4 is formed between the cap main body 1 and the hanging wall portion 5, the width being wider than the double layer thickness of the ventilation pipe 24 and the rising portion of the asphalt waterproof layer 2, which will be described later. It is.

The procedure for installing the ventilation pipe 24 using such a waterproof cap 9 is carried out in the following order. That is, as shown in FIG. 3, the vent pipe 24 has a water stopper flange 1 on its outer peripheral surface.
0 is integrally welded, and the roof slab 11
At the time of pouring, the vent pipe 24 is inserted into the slab 11 with the water stopper flange 10 buried therein. This water stopper flange 10 has an increased contact surface with the roof slab 11, so that the ventilation pipe 24 and the roof floor slab 11 are connected to each other.
This contributes to increasing the airtightness between the two and blocking rainwater from seeping in between the two. Next, mortar 1 is placed on the outer surface of the ventilation pipe 24 and the roof slab 11 at right angles to each other.
2, and the asphalt waterproof layer 2 laid on the surface of the roof slab 11 is raised using the mortar 12 and wrapped around the outer circumference of the ventilation pipe 24. Using the downward annular fitting groove 4, attach the waterproof cap 9.
As shown in the figure, the tip of the rising portion of the waterproof layer 2 is inserted into the downward annular fitting groove 4, and the rising portion of the waterproof layer 2 and the ventilation pipe 24 are connected to the upper end of the cap body 1 and the tapered draining portion 8. At the same time, the split band 13 is attached to the waterproof layer 2 on the underside of the waterproof cap 9 while being held between the side folded portions 7. This split band 13 consists of a stepped band-like body with a square cross section as shown in FIG. The above-mentioned binding is performed by bending the protruding tip side, and with the lower end of the waterproof cap 9 inserted into the stepped gap 17 of the split band 13, a suitable seal such as silicone resin is applied to the lower end of the waterproof cap 9. The material 18 is filled and cured to form a seal. After that, a bend cap 19 made of reinforced plastic is placed on the cap, and the bend cap 19 is placed with the internal positioning bar 20 engaged with the waterproof cap 9.
The locking bolt 21 is pressed against the outer circumferential surface 22 of the waterproof cap to fix it.

With this structure, the cap body 1 of the waterproof cap 9 comes into close contact with the asphalt waterproof layer 2 from the outside, and the protruding tip 7 elastically contacts the ventilation pipe 24 from the inside, thereby creating a seal. Material 18
By fixing the cap body 1 to the split band 13 and by receiving the pressing force of the fixing bolt 21 from the outside, the waterproof cap 9 is firmly attached to the ventilation pipe 24 and the asphalt waterproof layer 2. At the same time, the waterproof cap 9 grasps the asphalt waterproof layer 2 together with the split band 13 from the outer periphery by the cap body 1 to prevent the layer 2 from peeling off or slipping down.

In addition, in this structure, rainwater is absorbed by the asphalt waterproof layer 2.
Spray on the waterproof cap 9 with split band 1.
3 using the sealing material 18, seepage from between the cap body 1 and the asphalt waterproof layer 2 due to capillary action is prevented. On the other hand, rainwater blown into the bend cap 19 by the wind flows into the ventilation pipe 24 and is drained from the drain pipe. Since there is a tapered draining part 8 at the hanging end of the vent pipe 24 which is spaced apart from the vent pipe inner circumferential surface 24a, the water is drained at this part and does not adhere to the vent pipe inner circumferential surface 24a. There will be no seepage between the two due to capillary action. Temporarily, the tapered draining part 8
Even if some rainwater penetrates through the lower end and moves upward due to the capillary phenomenon, the groove width of the fitting groove 4 will not be the same as that between the ventilation pipe 24 and the rising part of the asphalt waterproof layer 2, as described above. It is formed to be larger than the double layer thickness, and as a result, a small cavity 23 is formed above the upper end side folded part 7 of the tapered draining part 8 as shown in FIG. The capillary phenomenon is destroyed in this small cavity 23, and rainwater no longer rises, thus causing rainwater to seep in between the ventilation pipe 24 and the asphalt waterproofing layer 2, ie, causing a water leakage accident. Never.

As described above, according to the present invention, by covering and holding the ventilation pipe and the waterproof layer on its outer periphery with the waterproof cap, it is possible to accurately prevent rainwater from entering between the two, and to prevent rainwater from blowing in. When flowing down the inside of the ventilation pipe, the tapered draining part of the cap can separate the rainwater from the inside of the ventilation pipe and allow it to drip. Even if some rainwater is affected by wind etc. Even if it goes around the water and rises due to capillary phenomenon, the width of the fitting groove is larger than the double layer thickness of the ventilation pipe and the rising part of the waterproof layer, so the tapered drainage part A small cavity is formed above the folded part on the upper end side, and the capillary phenomenon is destroyed in this small cavity,
Since further rise is prevented and rainwater is prevented from seeping into between the rising portion of the waterproof layer and the ventilation pipe, it is possible to prevent water leakage accidents in the building as intended. Moreover, the installation
Since the waterproof cap is simply fitted onto the upper end of the ventilation pipe, it is useful in terms of both time and cost.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a partially cutaway side view of a waterproof cap, FIG. 2 A and B are perspective views showing an example of a band-like body, and FIG. FIGS. 4 and 5 are longitudinal sectional side views showing a state in which the cap is used, and FIGS. 4 and 5 are longitudinal sectional side views showing examples of prior art waterproofing structures for ventilation pipes, respectively. 1...Cap body, 2...Asphalt waterproof layer, 4...Fitting groove, 8...Tapered draining portion, 1
1...Rooftop slab, 24...Vent pipe.

Claims (1)

[Scope of utility model registration request] The waterproof layer of the rooftop slab is formed to stand up along the outer peripheral surface of a ventilation pipe that penetrates the rooftop slab and is open to the atmosphere, and the inner diameter is approximately equal to the outer diameter of the rising portion of the waterproof layer. A cylindrical cap body, a hanging wall portion that bends inwardly and downwardly from its upper end in a substantially inverted L-shape, and a hanging wall portion that bends from the lower end of the hanging wall portion toward the inner circumferential surface of the cap body. , a tapered drainage part folded inwardly and downwardly from the tip thereof, and between the cap main body and the hanging wall part, a pipe having a width wider than the double layer thickness of the ventilation pipe and the rising part of the waterproof layer. A waterproof cap formed with a downward annular fitting groove is inserted into the open end of the ventilation pipe, and the tip of the rising portion of the waterproof layer is inserted into the downward annular fitting groove, and the rising portion of the waterproof layer and the ventilation pipe are connected to each other. is fitted between the cap main body and the folded part on the upper end side of the tapered draining part,
A structure for waterproofing a roof slab penetration part of a ventilation pipe for drainage equipment, characterized in that a bend cap is provided at the upper part of the waterproof cap.