JPH0637814B2 - Membrane surface stabilization method during deflation of air membrane structure - Google Patents

Description

The present invention relates to a method for stabilizing a film surface during deflation of an air film structure.

“Prior Art” As shown in the plan view of FIG. 3, the air film structure means that, from the compression ring 1 provided around the building, the wire 2 ... The material 3 is stretched to form the roof surface, and a pressure larger than the weight per unit area of the roof surface is applied to the chamber to support the roof surface with air pressure. In this structure, the membrane material 3 is stretched. Is usually performed by jointing the ends of the cut film material 3 to the area surrounded by the wire 2 on the wire 2 via the film end fixing hardware.

In addition, as shown in FIG. 4, the above-mentioned roof surface is supported by air pressure by using the blower 7 to blow the outside air 4 through the pressurizing air conditioner 5, the cooling and heating air conditioner 6, and the indoor blower 8 It is done by letting.

Blower pressure is constantly applied during inflation, but the blower is stopped and not used during deflation.

In addition, in the figure, 8'indicates warm air blowing for melting snow on the double-layered film surface, 9 is a return for ventilation, 10 is a film surface damper, and 11 is a damper.

When the above-mentioned joint is maintained, it is deflated so that it can approach the ground. However, since the roof material is made of a very light material, the roof surface is stable in the inflated state, but at the time of deflation. There is no resistance to the upward force from the wind.

Therefore, if a strong wind is applied during repairing during deflation, there is a risk of flapping of the film surface, worker safety, and damage to the film material.

Therefore, conventionally, the wire 2 is anchored to the floor, or a sand bag is placed as a weight on the upper surface of the film material 3 for protection.

"Problems to be solved by the invention" However, in the former case of the above-mentioned protective means, it is necessary to attach and detach the anchor material that interferes with the scaffolding, but the film surface is not required. It is an incomplete one that is indirectly restrained via a wire, and in the latter case, a point load is imposed on the film surface due to the troublesome arrangement and removal, and damage such as damage occurs. May cause inconvenience.

"Means for Solving Problems", "Action" The present invention has been made in view of the above circumstances, and the gist thereof is that, during deflation, the room air is blown to the outside through a blower. By lowering the indoor pressure below the external pressure by forced exhaust of, the downward suction force is applied to the roof surface,
By opposing the upward suction force at the time of strong wind and preventing the flapping of the membrane surface with the same internal and external pressure difference as at the time of inflation, the troublesome, incomplete, and inconvenience of the above-mentioned conventional means are completely eliminated. It is in.

[Example] Hereinafter, this will be described in detail with reference to the drawings.

The blower for forced exhaust of room air to the outside does not have to be newly installed.

By processing the blower function of the inflator blower so that it can be diverted, it can be provided easily and at low cost.

For example, a method of switching the electric wiring of the pressure blower can be considered.

This is a method of changing the blowing direction by reversing the motor of the pressure blower. Therefore, it is possible to increase the switching operation between pressurization and suction by simply inserting the changeover switch in the input side wiring.

Alternatively, as shown in FIG. 1, a method of providing a blower duct with a bypass and switching it may be considered.

That is, in the figure, a damper 13 is newly installed on the outside air side of the duct 12 of the blower 7, and the existing damper 11 and the blower 7 and the outside air side of the damper 13 as well as the indoor side of the damper 11 and the damper 13 and the blower are shown. Bypasses 16 and 17 having dampers 14 and 15 are provided between them.

As a result, as shown in FIGS. 2A and 2B, the blower 7 performs the functions of supplying air to the room and exhausting air.

That is, although the damper shown in black in the figure is CLOSE and the other is OPEN, it is air supply to the room in the mode of FIG. A and exhaust of room air in the mode of b.

"Effects of the Invention" As described above, according to the present invention, the film surface can be stabilized at the time of deflation without the troublesome means for mounting and removing, which is extremely convenient.

[Brief description of drawings]

FIG. 1 is an explanatory view of the structure of a blower duct which is an example of the present invention, and FIGS. 2a and 2b are operation diagrams of the duct, FIG.
FIG. 4 is an explanatory view of the air film structure. 12 ... Duct, 13 ... Damper, 14, 15 ... Damper, 16, 17
…bypass.

Claims (3)

[Claims] 1. At the time of deflation, the indoor pressure is lowered to the outside by forced exhaust of the room air to the outside through a blower, so that a downward suction force is applied to the roof surface and an upward force is exerted when the wind is strong. A method for stabilizing a film surface during deflation of an air film structure, which is characterized by counteracting suction force. 2. The membrane at the time of deflating the air membrane structure according to claim 1, wherein the forced exhaust of the room air to the outside through the blower is performed by reversing the motor of the pressurized blower. Surface stabilization method. 3. The deflation of the air film structure according to claim 1, wherein the forced exhaust of the room air to the outside via the blower is performed by a bypass additionally provided in the duct of the pressurized blower. Membrane surface stabilization method.