JP2716558B2 - Roof drain device used for rooftop floor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a roof drain device used on a rooftop floor.

(Prior Art) This type of roof drain device is used in an insulation method, a heat insulation method, and a combined waterproofing method in which both are combined.
The protective cover has a structure in which a cylindrical roof drain body having a receiving portion formed on an upper edge is positioned below a floor surface, and an insulating layer and a heat insulating layer are extended on the receiving portion and sandwiched therebetween. The bolts are overlapped with bolts.

(Problem to be Solved by the Invention) In the roof drain device having such a configuration, there is a problem that another type of roof drain device must be prepared according to the method of construction. In addition, when dew condensation occurs on the side of the skeleton under the influence of the temperature difference in the vicinity of the roof drain body, the dew may accumulate under the waterproof layer and cause a so-called "blistering" phenomenon. In addition, due to the construction deadline, if waterproofing is performed in a state where the skeleton side is not sufficiently dried, there remains a problem that water will aggregate under the waterproofing layer.

(Purpose of the Invention) The present invention has been made based on the above circumstances, has versatility in a plurality of construction methods, prevents dew condensation on the skeleton side, and further prevents water from aggregating under the waterproof layer. It is an object of the present invention to provide a roof drain device that can be used on a rooftop floor.

(Means for Solving the Problems) For this reason, according to the present invention, a flange, which is provided on the tray portion via a waterproof layer, is provided on a cylindrical roof drain body having a tray portion formed on an upper edge. A roof drain device for use on a rooftop floor having a protective cover attached thereto, comprising a cylindrical intermediate member fitted to the roof drain body via a gap, and a flange formed on an upper edge of the intermediate member Is located between the receiving portion and the flange, between the flange portion and the receiving portion, while interposing a construction layer for waterproofing between the flange portion and the flange, respectively, and the intermediate member Backflow preventing means is provided between the main body and the roof drain body.

If necessary, a groove extending toward the roof drain main body is formed in the tray portion.

(Operation) Therefore, according to the construction method, such as insulation layer, heat insulation layer,
Even when the layer thickness is different, it is possible to cope with the case where the intermediate member is divided into a plurality of layers by the flange portion.
Adjustment in the range of ~ 70m / m is possible. Further, since the space between the roof drain body and the intermediate member is adiabatic between the inside and the outside of the roof drain body, dew condensation on the skeleton side is avoided, and "blisters" can be avoided. Also,
Even if the backflow of rainwater occurs in the roof drain body, the backflow preventing means prevents water from entering between the roof drain body and the intermediate member. In addition, since the groove is formed in the receiving portion, even if water accumulates under the waterproof layer, the water remains in the roof drain body through the gap between the roof drain base and the intermediate member through the groove. Because the water flows down, the above voids can always be kept in a dry state, so even if a waterproof layer is applied while the frame is not completely dried, the water that has aggregated under the waterproof layer is removed, and the “blistering” phenomenon occurs. Can be avoided.

(Example) Hereinafter, an example of the present invention will be specifically described with reference to the drawings.

In the figure, reference numeral 1 denotes a cylindrical roof drain main body having a saucer portion 1a formed on an upper edge, and a lower end thereof is connected to a pipe 2. An anchor bolt 3 is attached to the neck of the roof drain main body 1 and is fixed to the frame 4. The tray 1a has a groove 1b in the radial direction,
Further, it is fixed to the skeleton 4 via the stainless steel bolt 5.
An edge of a construction layer 6 made of, for example, a warm air insulating sheet or a metal plate is overlaid on the tray 1a, and an intermediate member 7 is provided in the roof drain body 1 with a gap 8 so that a flange 7a is overlapped thereon. Are fitted via The intermediate member 7 has a cylindrical shape, and has a backflow preventing means 9 at a lower end thereof. In this embodiment, the backflow prevention means 9 has a stopper ring 9a having an outer diameter that is in sliding contact with the inner peripheral wall surface of the roof drain body 1, and a stopper ring 9a formed on the outer periphery of the intermediate member 7 with a diameter smaller than the inner diameter of the stopper ring 9a. A groove 9b, a guide taper surface 9c for contacting the stopper ring 9a with the lower end of the gap 8 to prevent water from flowing therethrough, and a support for supporting the stopper ring 9a when it is lowered. Part 9d
It is composed of The flange 7a is fixed to the frame 4 by the stainless bolt 10 through the pan 1a.
Attached to Bolt upwards on the flange 7a
11 is planted, this includes the flange of the protective cover 12
A bolt insertion hole provided in 12a is passed through, so that the protective cover 12 can be attached to the upper opening of the roof drain main body 1. In this embodiment, the construction layer 6
The extension of the waterproof layer 13 provided on the flange portion 7a is overlaid on the flange portion 7a, and the flange 12a is placed thereon. Then, the protective cover 12 is fixed by screwing the nut 14 to the bolt 11.

By devising the shape of the intermediate member 7, versatility for various types of roof drains can be ensured.

In such a configuration, when clogging occurs in the pipe 2, even if the water level rises in the roof drain body 1, the stopper ring 9 a floats by water pressure and closes the lower end of the gap 8, so that the intermediate member 7 and the roof drain are closed. There is no risk of water entering between the main body 1 and the main body 1. In addition, due to the presence of this gap 8,
Because of the heat insulating effect, no dew condensation occurs on the skeleton 4 outside the roof drain main body 1, and the "blister" phenomenon can be avoided. Further, if the waterproofing is performed in a state where the construction period is short and the frame 4 is not sufficiently dried, if water condenses under the construction layer 6 such as a metal plate, the water is condensed.
It leads to the gap 8 via 1b. The water that has entered the gap 8 flows down and flows into the roof drain main body 1 through the groove 9b. At this time, the stopper ring 9a separates from the lower end of the gap 8 and
As it is supported by 9d, it works on the method of distributing water as a means of preventing backflow.

In this way, the "blistering" phenomenon can be avoided.

In the above embodiment, the stopper ring 9a for preventing backflow is configured by using, for example, a thermoplastic foamed resin such as EVA, PVC, PP, PE or a vulcanized rubber-based foam such as SBR, UBR. Good to do.

(Effects of the Invention) The present invention has been described in detail above, and the flange portion of the intermediate member is located between the saucer portion of the roof drain body and the flange of the protective cover, so that the heat insulating method, the insulating method, or the like. It can be applied to the composite construction method, and not only can obtain general versatility, but also because of the action of the intermediate member and backflow prevention means, condensation on the skeleton side is avoided, and furthermore, the condensed water generated under the waterproof layer is eliminated. The ability is gained and the "blistering" phenomenon can be avoided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention, and FIG. 2 is a plan view of the same. DESCRIPTION OF SYMBOLS 1 ... Drain main body, 1a ... Receiving part 1b ... Groove, 4 ... Frame 6 ... Construction layer, 7 ... Intermediate member 7a ... Flange part, 8 ... Air gap 9 ... Backflow prevention means, 12 …… Protective cover 12a …… Flange, 13 …… Waterproof layer

Claims (2)

(57) [Claims] 1. A rooftop floor comprising a cylindrical roof drain body having a receiving portion formed on an upper edge thereof, and a protective cover having a flange superimposed on the receiving portion attached via a waterproof layer. A roof drain device used for a surface, comprising a cylindrical intermediate member fitted into the roof drain body with a gap therebetween, and a flange formed on an upper edge of the intermediate member is positioned between the tray portion and the flange. A waterproof layer is interposed between the flange portion and the receiving portion, and between the flange portion and the flange, and a backflow preventing means is provided between the intermediate member and the roof drain body. A roof drain device used for a rooftop floor, which is provided. 2. A groove formed in the receiving portion to extend toward the roof drain body.
A roof drain device used for a rooftop floor as described in (1).