JP2003138700A - Stagnant-water preventive device for non-snow-dropping roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the situation in which a large amount of rainwater and melted-snow water stay on a non-snow-dropping roof by the defective drainage and closing of a snow duct by any cause and permeate to an attic and a burden is shouldered to a roof structure. SOLUTION: The snow duct 5 installed on the bottom of inclined roof sections 4 and 4 constituting the non-snow-dropping roof 2 is formed in an approximately U-shaped longitudinal section from a bottom section 5A and a pair of wall sections 5B and 5B, and a drain inlet 5C connecting a roof drain 6 is formed to the bottom section 5A. An overflow pipe 8 in which an inflow port 8A is opened to the snow duct 5 and an outflow port 8B to the roof drain 6 is connected between the snow duct 5 and the roof drain 6. An overflow alarm device 9 monitoring the overflow of the snow duct 5 is composed of a water-leakage sensor 10 disposed into the overflow pipe 8 and an overflow alarm instrument installed into a house.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention avoids a situation in which rainwater or snowmelt water accumulates on a snowless roof used in a building in a snowfall area and floods the attic, and detects an abnormal situation at an early stage. The present invention relates to a device for preventing accumulated water for a snowless roof, which is capable of being carried out.

[0002]

2. Description of the Related Art In a building in a snowfall area, the snow accumulated on the roof is deposited on the roof without falling, and the upper layer is blown off by wind and the lower layer is melted by the load of snow and the warm air from inside the building. A snowless roof is used. This snowless roof is provided with a gutter-shaped snow duct on the lower end side of the gently sloping roof surface of the building, and a drain port is formed at an appropriate position on the bottom surface of the snow duct, and connected to the drain port. A roof drain is provided to discharge the snowmelt water into the lower sewer and underground.
The snowmelt water is discharged from the snow duct through the roof drain to drainage channels.

[0003]

The snowless roof is suitable for a building in which snow on the roof cannot be dropped onto the ground due to the site area and the adjoining ground, but has the following drawbacks. That is, various foreign substances such as dust, twigs, dead leaves, etc. carried by the wind are accumulated in the snow duct throughout the year, and these foreign substances gradually narrow the drain outlet of the snow duct and eventually block it. Is. Therefore, it is necessary to clean the inside of the snow duct once a season or two, especially the drain outlet.
Sometimes I forget about it, and sometimes I neglect it because it is a hassle when working on the roof. In addition, it may not be possible to work due to aging, etc., and cleaning the snow duct is not easy for everyone. Therefore, in the winter, rainwater and snowmelt water in the snow duct will not be discharged from the roof drain, will overflow from the snow duct and stay on the roof, and the roof will become a reservoir state and penetrate into the attic. . In addition, when the temperature drops, the accumulated water freezes and the structure of the roof is adversely affected.

However, the prior art does not provide any means for solving the above-mentioned accumulation of rainwater or snowmelt water on the snowless roof, and also provides means for knowing the presence or absence of accumulated water from inside the building. The current situation is that there are none.

The present invention has been made in view of the above-mentioned drawbacks of the prior art. A large amount of rainwater or snowmelt water is accumulated on the snowless roof due to defective drainage or blockage of the snow duct due to some cause, and thus the attic. It is possible to prevent the situation that it penetrates into the roof and the situation where it imposes a burden on the roof structure, and to give a prompt warning when the snowmelt water starts to stay in the snow duct. It is an object of the present invention to provide an accumulated snow prevention device for a snowless roof that has been made possible.

[0006]

Means for Solving the Problems According to the means of the present invention configured to solve the above-mentioned problems, an inflow port is provided at a position above a substantially middle position in a height direction of a snow duct which constitutes a snowless roof. An overflow pipe connected between the snow duct and the roof drain in a state in which an outlet is opened to a roof drain connected to the drain of the snow duct, and the overflow pipe flows into the overflow pipe via the inlet. And a water leak sensor for detecting an overflow of water, and an overflow warning means for issuing an alarm in response to an overflow detection signal from the water leak sensor.

The overflow pipe is preferably heated by a heating element.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. In the figure, 1 is a building, and 2 is a snowless roof installed on the upper part of the building 1. The snowless roof 2 has a frame portion 3 provided along the outer edge of the building 1, and the frame portion 3
It is composed of a sloping roof part 4 and 4 provided in a substantially flat V shape inside and a snow duct 5 installed in a valley where the sloping roof parts 4 and 4 merge, and the snow duct 5 has a bottom part 5A and a bottom part 5A. A pair of wall portions 5B and 5B standing from both ends of the bottom portion 5A,
A drain port 5C formed in the middle of the bottom portion 5A in the longitudinal direction is formed into a gutter shape having a vertical cross section in a generally square shape. A roof drain 6 made of a hollow pipe is vertically arranged in the building 1 so as to be connected to the drainage port 5C of the snow duct 5. Reference numeral 7 is a dust guard cup that covers the drain port 5C of the snow duct 5.

Reference numeral 8 is the snow duct 5 and roof drain 6
Shows an overflow pipe connected between the upper end and the upper end of the inlet port 8A of the snow duct 5 at an intermediate position in the height direction of the side wall 5B of the snow duct 5, and the lower end of the outlet port 8B of the roof drain 6. The opening is formed in the pipe wall 6A, and the synthetic resin pipe is bent to form a shape like a handle of a jug as a whole.

Reference numeral 9 denotes a flood alarm device which detects in advance that the snow duct 5 is overflowing with water and issues an alarm. Reference numeral 10 is a water leak sensor constituting the overflow warning device 9, and the water leak sensor 10 is attached to the inner surface of the overflow pipe 8 at the lower end side. Reference numeral 11 is a flood alarm device that issues an alarm in response to the overflow detection signal of the water leak sensor 10. The flood alarm device 11 is a relay 11B connected to the water leak sensor 1 via a signal line 11A, and a transformer 11C for the relay 11B. A power supply 11D that supplies power via a power source and an alarm device main body 11E such as a buzzer connected to the relay 11B.

A heating tape 12 is wound around the outer peripheral surface of the overflow pipe 8 over its entire length. The heating tape 12 is energized by a signal from a temperature sensor or the operation of a manual switch to generate heat, whereby the inside of the overflow pipe 8 is heated. It prevents freezing.

The present embodiment has the above-described structure, and rainwater and snowmelt water on the roof normally flow into the snow duct 5 and are discharged from the roof drain 6 to drainage channels and the like. However, when the discharge port 5C of the snow duct 5 is narrowed or blocked by foreign matter, snowmelt water or the like gradually accumulates in the snow duct 5. When the water level rises, the accumulated water flows into the overflow pipe 8 from the inflow port 8A,
It is discharged to the roof drain 6 from the outlet 8B.

As described above, when the snowmelt water or the like accumulates in the snow duct 5, the overflow pipe 8 discharges the accumulated water to the roof drain 6, so that the snowless roof 2 is in a reservoir state. Therefore, it is possible to prevent the situation that water leaks or freezes in the attic and adversely affects the structure of the building.

The phenomenon that the accumulated water is discharged from the roof 2 through the overflow pipe 8 is a flood alarm device 9
Since it can be detected by the method described above, prompt cleaning of the interior of the snow duct 5 can solve the problem of hindering the discharge of rainwater or snowmelt water at an early stage. Further, it is possible to solve the problem that the drainage by the overflow pipe 8 becomes normal.

[0015]

Since the present invention is constructed as described above in detail, it has the following effects. (1) Since an overflow pipe is connected between the snow duct and the roof drain, and rainwater or snowmelt water accumulates in the snow duct and reaches a certain level, it is automatically discharged to the roof drain side. It is possible to reliably prevent the situation where the roof top becomes a reservoir due to poor drainage and further penetrates into the attic. (2) By installing a water leak sensor in the overflow pipe and automatically monitoring the overflow from the snow duct, it is possible to prevent the overflow and prevent forgetting to clean the snow duct. (3) By heating the overflow pipe with a heating element, it is possible to prevent a situation in which the inside of the overflow pipe freezes at low temperatures and the overflow action cannot be exerted, and a situation where the water leak sensor freezes and the detection operation becomes defective. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a snowless roof with a snowfall prevention device for snowless roof according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a snowfall prevention device for a snowless roof.

FIG. 3 is an explanatory diagram of a flood warning device.

[Explanation of symbols]

1 building 2 Snowless roof 5 snow ducts 5C drainage port 6 roof drain 8 overflow pipe 8A inlet 8B outlet 9 flood alarm device 10 Water leak sensor 11 flood alarm 12 heating tape

Claims (2)

[Claims] 1. An inflow port opens at a position above a substantially middle position in the height direction of a snow duct that constitutes a snowless roof.
An overflow pipe connected between the snow duct and the roof drain in a state where an outlet is opened in a roof drain connected to a drain of the snow duct, and overflow water flowing into the overflow pipe through the inlet. A snowless roof water accumulation prevention device comprising a water leak sensor for detecting, and flood water warning means for issuing an alarm in response to a flood water detection signal from the water leak sensor. 2. The snowfall prevention device for a snowless roof according to claim 1, wherein the overflow pipe is heated by a heating element.