JPH10140879A - Roof snow removing sheet and installing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To slidingly drop and remove snow cover on a roof by adhering and fusing them by arranging plural belt-like air bags in parallel on the reverse side of a flexible sheet, and swinging a sheet surface by intermittently repeating expansion/contraction by introducing gas into the air bags. SOLUTION: Air bags 2 formed of the same sheet on the reverse side of a roof snow removing sheet 1 by covering a fiber sheet of polyester type fiber or the like with synthetic resin such as soft vinyl chloride type resin, are arranged in a plurality in a belt shape in parallel to a ridge part, and are integrally adhered or welded, and are arranged on a roof surface. When a fallen snow detector detects fallen snow, an air supply device 4 is automatically started, and supplies air through air piping 3, and successively expands and contracts the air bags 2 to a lower part from an upper part, and swings the roof snow removing sheet 1 in a wave shape, and slidingly drops the fallen snow on the sheet 1. Therefore, the air bags 2 are covered with the sheet 1, and are not exposed to a surface, and external appearance performance is improved, and fluttering and a noise by a strong wind are not caused, and snow sliding performance is also improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a novel roof snow removal sheet. The roof snow removal sheet according to the present invention is excellent in snow sliding property of a fog roof or an arched roof, and has advantages such as low energy cost and simple construction. It is used as a roof snow removal sheet for large-scale structures such as general houses, warehouses, and gymnasiums.

[0002]

2. Description of the Related Art Conventionally, in a snowy country, particularly in a so-called heavy snow area in which snow that has once fallen becomes root snow and further snow accumulates, damage to the roof due to the snow load or a large amount of snow falling at a stretch due to weather conditions. , There are serious problems such as hitting passers-by and causing accidents,
A person had to climb the roof and use a scoop or the like to manually remove the snow or otherwise install a snow melting device on the roof. Here, the snow melting device is, for example, a device that causes groundwater to flow down from the roof top, or a heating tile or a heating sheet provided with a snow melting heater.

[0003]

However, when snow is removed manually, snow falls day and night, but a large amount of snow is produced in a short time, especially at night when the temperature drops.
Residents must always be aware of when snow removal is required, at which point they are already experiencing mental distress. Working in even more severe weather conditions and on roofs with poor scaffolding is hard work and very dangerous,
Some precious lives have been lost.

[0004] On the other hand, when a snow melting device is provided, if it is linked with a snow detecting device, the groundwater flows automatically according to the amount of snow and the electric heater is activated without human being conscious. Roof snow can be removed comfortably. However, these snowmelt systems have problems not only with initial costs, but also with location conditions as to whether or not groundwater can be easily used with the groundwater flow method, and running costs due to the need to constantly pump groundwater. In the snow melting heater system, in addition to the initial cost, running energy is also a problem because a large amount of electric energy is consumed in order to generate heat energy enough to melt all snow. Therefore, even now, no definitive snow melting device has been proposed, and the fact is that, except for a part, it still depends on manual snow removal.

The present invention overcomes the drawbacks of this technique and eliminates the pain of snow-dropping without human intervention, with simple construction, easy operation, and extremely low operation and maintenance costs. It is an object of the present invention to provide a snow-removable roof snow removal sheet excellent in design and a method for installing the same.

[0006]

The present invention employs the following configuration to solve the above-mentioned problems. That is, in the snow removal sheet of the present invention, a plurality of belt-like airbags are adhered or fused in parallel to the back surface of a flexible sheet, and a gas is introduced into the airbag to intermittently expand. The sheet surface is swung by repeating contraction.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS There have been several applications of a snow-removing device for inflating a sheet into an airbag by air. However, in any of these applications, the sheet surface itself in contact with snow has an airbag-like shape. Had been sewn. expansion,
The airbag, which repeatedly shrinks and applies high internal pressure, consists of a woven fabric as a reinforcing fiber coated with a resin, and requires a high tensile strength and high tensile modulus to prevent creep and tearing of the sheet. Met. However, the fact that the airbag, which is difficult to stretch, is exposed on the roof surface is good when the airbag is inflated, and when it is deflated, it becomes wrinkled and unsightly. However, there is a problem that fluttering causes flapping, noise and damage.

On the other hand, in the present invention, the sheet exposed to the roof surface for sliding snow is a single sheet, and an airbag for raising and lowering and swinging the sheet is adhered or fused to the back surface of the sheet. Because of the configuration, when the airbag contracts, even if it becomes wrinkled, there is no problem in appearance. Also, as for the snow-sliding performance, the snow-covered surface is a single sheet, and there is no problem such as accumulation of snow due to the valleys of the adjacent airbags, and snow-sliding occurs extremely smoothly.

First, the configuration of a sheet used as a single sheet on the front surface will be described. The sheet used in the present invention is a composite sheet composed of a fiber sheet having a woven structure and a synthetic resin covering the fiber sheet. Even if it is the airbag side that is directly responsible for the stress by inflation and contraction,
The inflating of the airbag and the load of the snow cover cause considerable stress. Therefore, such a configuration in which the reinforcing fibers are incorporated like the airbag is essential. The role of the synthetic resin that covers the fiber sheet is to maintain the airtightness of the sheet, prevent water absorption from the sheet surface, and provide the surface with smoothness and low friction to enhance the snow sliding property of the sheet. is there. The flexibility of the sheet is also controlled substantially by the properties of the synthetic resin.

[0010] The sheet on the surface of the roof snow removal sheet of the present invention is particularly provided that the fabric sheet is responsible for strength and the synthetic resin coating the fabric sheet achieves airtightness, waterproofness, and low friction. Although it is not limited, first, regarding the fiber sheet, specifically preferably glass fiber,
The woven fabric is made of at least one fiber selected from polyester fibers, polyamide fibers, polyolefin fibers, polyvinyl alcohol fibers, polyacrylonitrile fibers, light metal fibers, and carbon fibers. However, from the viewpoint of cost and durability, glass fiber is more preferable.
Polyester fiber and polyamide fiber. Among them, glass fiber is excellent in weather resistance, but if bending occurs during storage of the sheet, there is a high possibility that the strength is reduced in the bent portion. Therefore, polyester fiber and polyamide fiber are more preferable. Particularly preferred are polyester fibers.

Next, the synthetic resin for coating the fiber sheet is at least one kind selected from a fluorine resin, a soft vinyl chloride resin, a polyolefin resin, a fluorine elastomer, a polyolefin elastomer, and chloroprene rubber. Among them, fluorine resins, soft vinyl chloride resins, and fluorine elastomers are more preferable in terms of durability, but fluorine resins are generally rigid. Resins and fluorine-based elastomers, particularly preferably soft vinyl chloride-based resins. Further, the soft vinyl chloride-based resin is advantageous in this point because the workability is significantly superior to that of the fluorine-based resin when the bag is formed by heat fusion.

The configuration of the airbag may be basically the same as that of the topsheet, and considering the workability such as adhesion or fusion, at least the type of the synthetic resin covering the woven fabric sheet should be the same. It is preferable to keep it. Since airbags are required to have higher flexibility and folding resistance than surface sheets, glass fibers and the like should be avoided as woven sheets.

Next, an example of an airbag arrangement and a method of installing a roof snow removal sheet according to the present invention will be described with reference to the drawings. In FIG. 1, a plurality of airbags parallel to the ridge are arranged in a strip shape. In this case, if a gas introduction pattern is used in which the lower bags are inflated in order from the uppermost bag, the airbags may be wavy. As a result, the snow can be slid efficiently. An airbag is obtained by stacking sheets together, heat-sealing, bonding, or sewing with a sewing thread. However, sewing with a sewing machine is waterproof,
Since the airtightness is insufficient, it is preferable to perform post-processing for waterproofing and airtightness after sewing. The same technique may be used for integrating the topsheet and the airbag.

The roof snow removing sheet integrated with the airbag in this manner functions as a roof snow removing device by being integrated with the air supply device and the snow detector. As a snow detector, for example, there is known a method of detecting a predetermined pressure due to snow using a pressure-sensitive element, a method of transmitting an ultrasonic wave toward a snow receiving plate, and detecting a change in reflection intensity due to snow. However, any method may be used, and the method is not limited to this. The air supply device starts driving in response to the signal from the snow detector, but the amount of snow that is set at that time is enough to prevent injuries, even if the snow falls, It is important to set it low so that it does not exist. It is more preferable to perform settings such that expansion and contraction are performed a plurality of times by one snow detection to make snow fall more reliably.

According to the roof snow removing device of the present invention, when the snow detector detects a predetermined amount of snow on the roof, the gas supply device is operated, and the air bag comprising the woven sheet and the synthetic resin composite sheet is activated. When gas is supplied and inflated, a plurality of the airbags are arranged on the back surface, and the integrated topsheet is raised to slide down snow, and then the airbag is evacuated and contracted. In addition, the expansion and contraction movements are intermittently repeated, so that snowfall can be more reliably caused.

Since the airbag is stored behind the topsheet exposed on the roof surface, there is no problem with the appearance even if the airbag is deflated and shrunk, resulting in flapping in strong wind, noise and noise. No problems such as breakage occur. Also, since the surface is a single sheet, it is extremely smooth and has excellent snow sliding properties.

[0017]

The present invention will be described in more detail with reference to the following examples.

Embodiment 1 An embodiment will be described with reference to FIG. In the figure, reference numeral 1 denotes a roof snow removal sheet in which a polyester fiber fabric is covered with soft vinyl chloride, and reference numeral 2 denotes an airbag section which comprises the sheet in an airtight bag shape, and supplies and inflates air. 3
Is an air pipe for communicating the inside of the bag section 2 with the air supply device 4.

First, a roof snow removing sheet was obtained by coating both sides of a woven fabric obtained by weaving a polyester multifilament with a melt-kneaded soft PVC resin by calendar topping. The tensile strength of the obtained sheet was 112 kgf / 3 cm, and the Gurley-type softness was 4220 mg. Using this sheet, a sheet for a roof snow removal device having a bag portion was formed by heat fusion sewing. As a method of heat fusion sewing, an internal heating method using a high-frequency welder was employed. The obtained roof snow removal sheet did not show any water absorption from both the surface and the joint.

Next, the snow removal sheet on the main roof is fixed to the 20-degree foggy roof so that the airbags are arranged in parallel with the building.
A snow sliding experiment was conducted on site. The air supply device was set to be driven with a snow cover of approximately 10 cm to 20 cm by a snow cover sensor using a pressure-sensitive element. The order in which air was supplied to the airbags was set so that the airbag in the next lower stage would be inflated after the inflation was completed in order from the airbag in the ridge at the top. This process was repeated five times with one snow detection.

Comparative Example 1 Comparative Example 1 will be described with reference to FIG. The material configuration of the roof snow removal sheet is the same as that of the first embodiment, but the second airbag itself is exposed on the roof surface, and one sheet of the surface is omitted. In addition, the snow detection, the air supply device, and the method of installation on the roof were the same as those in Example 1.

Table 1 shows the results of comparing the snow sliding performance and appearance of these two cases.

[0023]

[Table 1] As described above, in Example 1, the snow on the roof could be completely dropped, and the appearance of the airbag did not matter at all even if the airbag was contracted after the fall. However, in Comparative Example 2, a small amount of snow remained in the valleys of the adjacent airbags. As for the load on the roof surface, the snow fell to a level that did not cause any problem. However, since the remaining snow is expected to have an adverse effect such as freezing on the membrane surface in a long time, the configuration of Example 1 is still excellent. I have. In addition, the appearance of the airbag of Comparative Example 1 after the airbag shrinks is a problem because the wrinkled state of the airbag is very unsightly.

[0024]

【The invention's effect】

1. Since the airbag is housed under one sheet on the surface, it has an excellent appearance when contracted.

2. Since the surface in contact with snow is a single sheet, the surface is smooth and has excellent snow sliding properties.

3. Snow removal can be performed at an extremely low running cost as compared with the snow melting type.

4. Built-in reinforced fiber fabric, excellent durability in repeated use.

[Brief description of the drawings]

FIG. 1 is an embodiment of a roof snow removal sheet of the present invention.

FIG. 2 is a comparative example of FIG. 1, which is a roof snow removal sheet that does not use a topsheet.

[Explanation of symbols]

 1: roof snow removal sheet 2: airbag section 3: air pipe 4: air supply device

Claims (7)

[Claims] An airbag is attached to the back surface of a flexible sheet by bonding or fusing, and a gas is introduced into the airbag, and the airbag is intermittently inflated and contracted repeatedly to shake the sheet surface. A roof snow removal sheet characterized by being moved. 2. The roof snow removal sheet according to claim 1, wherein the plurality of airbags repeatedly inflate and contract at different times. 3. The roof snow removing apparatus according to claim 1, wherein a plurality of belt-shaped airbags are arranged in parallel, and the airbags repeatedly inflate and contract in a predetermined direction, and swing as if they are wavy. Sheet. 4. The roof snow removal sheet according to claim 1, wherein the sheet is a film material made of a textile sheet having a woven structure and a synthetic resin covering the fiber sheet. 5. The fiber sheet is made of at least one fiber selected from glass fiber, polyester fiber, polyamide fiber, polyolefin fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber, light metal fiber, and carbon fiber. The roof snow removal sheet according to claim 4, wherein the sheet is a woven fabric. 6. The synthetic resin according to claim 4, wherein the synthetic resin is at least one selected from a fluorine resin, a soft vinyl chloride resin, a polyolefin resin, a fluorine elastomer, a polyolefin elastomer, and chloroprene rubber. Roof snow removal sheet. 7. The method according to claim 1, wherein the airbag is arranged in a ridge portion of the roof so as to form a belt.