JPH10238166A - Snow removing method for temporary roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a suitable application for a temporary roof using a single canvas structure tent and having low snow load resistance. SOLUTION: An oscillation type blower 20 is arranged on the top part angle side of a roof surface 11 of a temporary roof 10. The blower 20 is caused to effect oscillation operation in a range of approximately 90 deg. and snow on the roof surface 11 is blown off. Further, a plurality of snow sensing sensors 30 are disposed on the roof surface and when some of the sensors 30 senses snow, the blower 20 is stops oscillation operation once at an oscillation angel at which pointing to the installation position of the sensor 30 is effected, and blast is preponderantly effected against a snow spot. Further, A guard net attached at the air suction port of the blower 20 to prevent suction of a foreign matter is heated and snow sucked through the air suction port is prevented from being discharged as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing snow from a temporary roof, and more particularly to a method for removing snow from a tent-type temporary roof having a single-layer structure, which is installed at a work site because it is not affected by the weather.

[0002]

2. Description of the Related Art At a work site, a simple and low-cost temporary roof, which is a single frame tent covered with a frame as shown in FIG. 1, is installed to provide a temporary storage space for materials, workers and electrical equipment. We use as rain and snow avoidance. When such a temporary roof is provided in a snowfall area, the temporary roof may collapse depending on the amount of snow on the roof, and when the snow load resistance of the temporary roof is increased, it is necessary to strengthen the frame frame, The advantages of a temporary roof, such as simple installation and low cost, are impaired. On the other hand, it is dangerous and troublesome to perform manual snow shaking because the work becomes a slippery work at a high place. Also, when it comes to melting snow with a heater,
There is a problem that the cost increases. Furthermore, blowing hot air into the space between the membranes as in a double-membrane tent cannot be applied to a single-membrane tent.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to be applied to a temporary roof with a small snow load using a tent having a single-layer structure. It is an object of the present invention to provide a possible snow removal method for a temporary roof.

[0004]

A method for removing snow from a temporary roof according to the present invention is characterized in that a swing-type blower is installed on the roof surface of the temporary roof, and the blower blows off snowfall on the roof surface. .

[0005] As a temporary roof, a single-layer tent-type roof having a small snow-bearing load as described in the section of the embodiment is mainly applied to the present method, but is not particularly limited thereto. In addition, the roof surface refers to a roof part to be substantially subjected to snow removal on a temporary roof.

A swing type blower is a general type that can change the blowing direction over time within a predetermined angle range in a horizontal plane, and the swinging blower increases the roof surface area that can be handled by one blower. Therefore, the number of installations for one roof surface can be one or at most two.

According to the present invention, a plurality of sensors capable of detecting snow cover are provided over the entire area of the roof surface, and a neck of the blower is blown so that the blower mainly blows a portion where one of the sensors detects snow cover. Swing can be controlled.

As a sensor capable of sensing snow cover, for example, a light receiver (which may be an infrared ray or a laser) from a light transmitter is received by a light receiver and is normally turned off. When light does not reach the surface, a small and lightweight one that is turned on to exhibit a snow reaction can be preferably used. Note that a pressure-sensitive sensor can be used.

In the swing control of the blower, the swing angle of the blower pointing to each sensor installation position is input to a computer in advance, and the blower is set to the swing angle pointing to the sensor installation position indicating the snowfall reaction. In this case, the computer can be set to control the blower so as to stop the swing operation for a predetermined time, for example.

According to the present invention, the guard net attached to the air suction port of the blower for preventing foreign matter suction can be heated so that the snow sucked from the air suction port is not released. Since the guard net is generally made of metal, it can be heated using a heating wire or the like, thereby instantaneously melting the snow sucked from the air suction port so that the blower does not release the air mixed with snow. Things.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for removing snow from a temporary roof according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view schematically showing a temporary roof 10 to which one of the favorable applications of the present method is applied. Temporary roof 1
Reference numeral 0 denotes a tent 1 having a membrane sheet structure except for front and rear open ports in a frame 2 assembled so as to be able to run on left and right rails 1, which is used as a temporary storage space for materials at a work site.
0 '. The temporary roof 10 is provided with two sloping roof surfaces 11, each of which is subject to substantial snow removal, and the snow bearing weight of the roof surface 11 is up to 300 kg / m ^2.
Is set to

The temporary roof 10 has one or both of the front and rear end frame frames 2 on the rails 1 so that the front and rear open ports are close to each other.
Can be compressed in the front-rear direction by moving the seat (tent 1) on the roof surface 11 in this compressed state.
0 ′) falls downward from between the frame frames 2 and is folded in a bellows shape (not shown). In addition, another temporary roof (see a broken line) similar to the temporary roof 10 is provided on another rail 1,
By compressing one or both, the space between the temporary roofs can be freely opened and closed. When the air jet nozzle is installed between the frame frames 2 on the roof sheet (10 '),
In order to hinder the compression and opening and closing of the temporary roof 10,
Cannot be used.

In the vicinity of the top front end of each roof surface 11,
A swing type blower 20 is installed one by one.
The blower 20 is a well-known type that continuously discharges air sucked from the suction port by the rotation of the blade fan from the discharge port and blows the air. For example, a powerful blower that can blow 50 m away is also commercially available. . In this embodiment, since the size of each roof surface 11 is about 7 m × 14 m, a relatively small and lightweight blower can be selected. The blower 20
A mesh net (not shown) for preventing foreign matter from being sucked is generally attached to the air suction port.

The blower 20 is generally provided with a swinging function. By operating the swinging function, the blowing direction can be reciprocated within a predetermined angle within a horizontal plane to change with time. . In addition, the blowing angle in the vertical plane can also be adjusted manually or the like. In this embodiment, since the blower 20 is installed at a corner (near the front end of the long part) of the rectangular roof surface 11, the swing angle of the blower 20 in the horizontal plane is 90 degrees (even if the blower is less than 90 degrees, the diffusion of the blower is not limited). By doing so, it is possible to blow off the snow on the entire surface of the roof 11 by blowing air from the blower 20, thereby preventing snow on the roof 11.

FIG. 2 is a plan view of one roof surface 11. In addition to the blower 20, a sensor 30 capable of sensing snow can be disposed on the roof surface 11. In the present embodiment, the sensor 30 capable of sensing snowfall forms a pair with a pair of light emitters 31 and light receivers 32, and the light emitted from the light emitters 31 is received by the light receiver 32 to be in a normal OFF state. A well-known one that reacts as an ON state when the light accumulated by the light receiving device 32 is interrupted by the light accumulated in the space between the devices 32 blocking light. Such a sensor 30 is small and lightweight,
It is sufficiently possible to install a plurality of sensors even on the sheet-like roof surface 11, and as shown in FIG.
2 on the roof surface 11 in the horizontal direction (vertical direction in FIG. 2).
In the row, 13 sets were installed in the front-rear direction (the left-right direction in FIG. 2) at appropriate intervals over the entire roof surface. The height of the light between the light emitter 31 and the light receiver 32 from the roof surface 11, that is, the height of the snow covered by the sensor due to shading was 5 cm.

When the amount of snowfall is large, even when the blower 20 is continuously operated, snow may accumulate on a part of the roof surface 11, and when one of the sensors 30 reacts, the reaction sensor (for example, 30) ') Installation position (emitter 31
-The swing of the blower is controlled so that the blower blows mainly to the (light receiver 32 central portion).

As a mode of the swing control, the swing angle of the blower 20 pointing to the installation position of each sensor is input in advance to a computer (not shown) installed indoors of the temporary roof 10 and the like. When the air from the air reaches the angle directed to the reaction sensor 30 ′, the computer temporarily stops the oscillating drive device of the blower 20, so that the air is mainly directed to the position of the reaction sensor, and the reaction disappears. At this point, the computer can again activate the swing drive to return to normal operation. Further, during the normal swinging operation of the blower 20, the computer stops the swinging for a predetermined time, for example, several tens of seconds, when the response sensor directing angle is reached, and then, even if the snow reaction does not disappear. It is also possible to return to the normal swing motion again and repeat this until the snow reaction disappears.

If the amount of snowfall is large, the blower 20 sucks snow from the air suction port and emits a wind mixed with snow.
In some cases, this mixed snow directly adheres to the roof surface. To prevent this, a heating wire is attached to a generally metal guard net attached to the suction port of the blower 20, and the guard net is heated to instantaneously melt the snow that is going to pass through the guard net. The snow is not released as it is.

[0020]

As described above, in the method for removing snow on a temporary roof according to the present invention, the snowfall is blown off by a swinging blower, so that a single blower can cope with snowfall over a relatively large area. Since the number of installations on the roof surface is one or at most two, it can be applied to a roof surface having a single membrane structure without any problem in weight. In addition, multiple sensors that can detect snow cover are installed on the temporary roof, and swing control is performed so that the air blower of the blower is directed to the location where one of the sensors detects snow cover, thereby removing snow. Efficiency can be improved. Further, by heating the guard net of the blower, it is possible to release only air even if the blower sucks snow.

Therefore, it is possible to install a temporary roof having a small snow load in a heavy snowfall area without particularly strengthening the frame.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a single-layer tent type temporary roof to which a snow removing method of the present invention is applied.

FIG. 2 is a plan view showing one roof surface of a temporary roof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Temporary roof 11 Roof surface 20 Blower 30 Sensor 31 Projector 32 Receiver

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Atsushi Saito 2-5-8 Kitaaoyama, Minato-ku, Tokyo

Claims (3)

[Claims] 1. A method for removing snow from a temporary roof, comprising: installing a swing-type blower on the roof surface of the temporary roof, and blowing off snowfall on the roof surface by the blower. 2. A plurality of sensors capable of detecting snow cover are provided over the entire area of the roof surface, and the blower is swung so that the blower blows air to a location where one of the sensors detects snow cover. 2. The method for removing snow from a temporary roof according to claim 1, wherein 3. The air blower according to claim 1, wherein a guard net attached to the air suction port of the blower for preventing foreign matter suction is heated so that snow sucked from the air suction port is not released. Snow removal method for temporary roofs.