JPS6139774Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a device that is attached to a drainage pipe gutter for rainwater or snowmelt water on a rooftop.

As shown in FIG. 1, water on the rooftop of a roof 1 with a small slope is drained to a drainage basin 3 by a drain pipe 2 penetrating indoors when considering anti-freezing of gutters or gutters along outdoor walls. This invention relates to what is generally called a roof drain, which is provided at the upper end of the drain pipe 2 at the connection point with the roof top.

As shown in FIG. 2, this type of conventional roof drain has a bottom plate 5 which has a pipe 4 on its bottom surface which is externally connected to the drain pipe 2, and a cap 6 which is seated on the upper end of the pipe 4 in the center of the bottom plate 5. In this case, if waterproof pine (not shown) is laid and glued to the concrete roof surface, the base plate 5 will be directly buried in the concrete and the surrounding brim edge 7 will be flush with the top surface of the concrete. The end of the waterproof mat is waterproof and the bottom plate 5
It is sandwiched between the inner bottom peripheral surface of the cap 6 and the cap 6. In conventional roof drains, this clamping means is not sufficient, and water enters between the waterproof mat and the concrete, causing various problems. The first point of improvement in this invention is to ensure this clamping. In snow-covered areas, it is necessary to remove snow on rooftops, and in this regard, the inventor of this application proposed a system in which indoor temperature is raised by a drain pipe 2 at the bottom of the snow layer, the water is melted, and the water is drained from the drain pipe 2. The idea was first filed. This system has been implemented in schools and other places as a snow-proof roof that does not require snow removal work, and is attracting attention. The roof drain used for the snow-free roof prevents the warm air rising into the cap 6 from coming into contact with snow immediately, prevents blizzard snow from blowing into the cap 6, and prevents the upper end of the drain pipe 2 from freezing. An outer cap 8 is required for this purpose. This invention makes this point the second point of improvement. At this time, improvements have been made to the relationship between the caps 6 and 8, especially the relationship between the hot air and the flow of hot air. Furthermore, although the drain pipe 2 is provided with a dust screening plate 9, it is necessary to insert a brush to remove scale. For this purpose, the cap 6 and the bottom plate 5 can be easily separated in preparation for insertion from the upper end of the drain pipe 2.

An embodiment that achieves the above object will be described with reference to FIG. 2. The bottom plate 5 has a dish-shaped cross section and a raised edge 7, and a hook 10 is provided on the bottom surface of the edge 7. We are trying to connect with The peripheral edge of the communication part between the bottom plate 5 and the pipe 4 is formed in a flat plate part 11. The cap 6 has an L-shaped periphery 12 externally provided on its bottom periphery to sit on a flat plate 11, and has an elongated hole 13 vertically bored in the main body peripheral wall.
The peripheral edge 12 and the flat plate part 11 are connected to the bolt nut 14
are connected. Since the waterproof mat extends from the brim edge 7 and is clamped and fixed between the peripheral edge 12 and the flat plate part 11, the waterproof mat is separated from the concrete, allowing rainwater to flow into the pipe 4 and preventing the waterproof mat from curling up. Since the collar edge 7 is in a rising shape on the outer periphery of the flat plate part 11, the periphery edge 12, that is, the cap 6 is connected to the bottom plate 5.
This makes it easy to align the bolt holes of the bolt and nut vertically, and there is no wobbling. Rainwater is on the periphery 12
and flows into the long hole 13. The outer cap 8 is a dome-shaped tube 1 that covers the bottom plate 5 and is provided at the center of the inner surface.
5 is externally fitted onto the cap 6 in a threaded manner, and a water inflow groove 16 is provided at the bottom periphery. Then, the waterproof mat is sandwiched between the bottom peripheral edge and the brim edge 7 of the bottom plate. As an alternative to the embodiment described above, a hole may be made in the head plate 17 of the cap 6 through which hot air flows down through a hole made in the tube 15.

According to the configuration of the cap 6 and the outer cap 8, the warm air rising through the drain pipe 2 accumulates in the outer cap 8, while the snow layer filling the outer cap is affected by the accumulated warm air. Heated outer cap 8
Depending on the temperature, the snow melts and becomes hollow, and then the hollow collapses and the snow gradually disappears. At this time, the drain pipes 2 and 4 do not freeze due to the accumulated warm air, so the melt water is always drained. In Fig. 1, 18 is a drain valve, and the upper valve 19 is a drain valve when water is stored on the roof in the summer and the hot water is used, that is, when a peripheral wall 20 is built on the roof and an overflow pipe 21 is attached. It is.

As mentioned above, this invention achieves the purpose of the invention in the header, that is, to ensure the connection between the waterproof mat and the drain pipe,
When it snows, the drainage pipe is made unfrozen to drain melted water, and by removing the cap 6, the drainage pipe can be washed.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the roof drain of this invention in use, and FIG. 2 is a partial vertical sectional view of this invention. In the figure, 1 is the roof, 2 is the drain pipe, 4 is the pipe, 5 is the bottom plate, 6 is the cap, 7 is the brim edge, 8 is the outer cap, 11 is the flat part, 12 is the periphery, 13 is the long hole, 1
4 is a bolt nut, 15 is a cylinder, 16 is an inlet groove, 1
7 is the head board.

Claims (1)

[Scope of utility model registration request] a bottom plate 5 having a dish-shaped cross section with a pipe 4 hanging therefrom;
A cap 6 is provided with a long hole 13 in the peripheral wall of the cylindrical body and a peripheral edge 12 on the outer periphery of the bottom surface to sit on the flat plate 11 in the center of the bottom plate 5. A waterproof mat is sandwiched between the base plate 11 so that the connection can be made freely, and the bottom periphery is sized to overlap the periphery of the bottom plate 5, and an inflow groove 16 is formed in the bottom periphery.
An outer cap 8 is provided at a predetermined position and has a height that is higher than the cap 6 by a required amount when the bottom periphery is seated on the periphery of the bottom plate 5. 15 is screwed onto the cap 6 so that it can be fitted externally.