JPH05340139A - Heat-insulating structure of membrane structure - Google Patents

Abstract

PURPOSE:To decrease the number of the components of a membrane structure as ensuring a heat-insulating function while lightening the membrane structure. CONSTITUTION:A membrane roof 14 is constituted in double structure by an outer membrane 30 formed of a waterproof flexible membrane and a heat- insulating membrane 32 arranged inside the outer membrane 30. The outer membrane 30 and the heat-insulating membrane 32 are separated at a regular interval, and an air layer 34 is formed. The heat-insulating membrane 32 is organized by forming a heat-insulating material consisting of a flexible closed foam in a filmy shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film structure for hermetically covering the inside, and more particularly to a heat insulating structure for a film structure having a heat insulating function.

[0002]

2. Description of the Related Art In recent years, a roof of a structure such as a large space facility having a pillar-free structure such as a dome is being constructed by a membrane roof as a membrane structure. In this membrane roof structure, a waterproof flexible membrane airtightly covers between upper ends of outer walls surrounding a large space facility. The membrane roof is inflated by injecting air into the large space facility, and a dome-shaped roof having a bulged central portion is formed in this inflated state. Further, the membrane roof is supported by a cable that is installed between outer walls with an appropriate interval to prevent the membrane roof from being fluttered during strong wind.

[0003]

However, in such a membrane roof structure, when the membrane roof is constructed as a single membrane structure, the outside temperature is greatly influenced through the membrane roof into the large space facility. I will end up. In particular, when the facility is exposed to direct sunlight in the summer, the inside of the facility is in a greenhouse state and its temperature is remarkably raised, and the energy consumption for air conditioning inside the facility becomes large, which is inevitable. As a result, the size of air conditioners will increase significantly.

Therefore, the membrane roof has a double membrane structure,
By installing a heat insulating material in it, it is possible to significantly improve the heat insulating efficiency and reduce the influence of the outside temperature as much as possible, but in this way the membrane roof is made a double membrane structure and the heat insulating material is interposed in it. In such a case, the roof has a triple structure due to the double film and the heat insulating material, the number of parts is increased, and the cost is significantly increased. Further, since the weight of the membrane roof is increased by such a triple structure, there is a problem that it is necessary to increase the air pressure injected into the facility in order to inflate the membrane roof.

In view of such conventional problems, the present invention is capable of reducing the number of constituent parts of the membrane structure and achieving weight reduction while ensuring the same heat insulation function as the conventional one. The purpose of the present invention is to provide a heat insulating structure.

[0006]

In order to achieve the above object, the present invention provides an outer membrane that hermetically covers the inside, and
A heat insulating film formed in a film shape with a heat insulating material made of a flexible closed cell is provided inside the outer film, and an air layer is provided between the outer film and the heat insulating film.

[0007]

With the above structure, in the heat insulating structure of the membrane structure of the present invention, the outer layer and the heat insulating film sandwich the air layer so that the film structure has a double structure. Since it is formed in a film shape, it exerts a great heat insulating effect, and can perform heat insulation in the same manner as a triple structure in which a heat insulating material is interposed between double films. In addition, the double structure of the outer membrane and the heat insulating membrane reduces the number of constituent parts of the membrane structure.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 4 show an embodiment of a heat insulating structure of a membrane structure according to the present invention, FIG. 1 is a schematic configuration diagram showing a cross section of a large space facility to which the present invention is applied, and FIG. 2 is A in FIG. -A
2 is an enlarged cross-sectional view of the main part from the line, FIG.
FIG. 4 is an enlarged view of an end portion of the hanging main membrane.

That is, the large space facility shown in FIG. 1 is used as an artificial ski resort 10. Outer walls 12, 12 are constructed on both sides, and a membrane roof 14 as a membrane structure is provided between the upper ends of these outer walls 12, 12. Is stretched. And the outer wall 1
The floor surface 18 of the large space portion 16 constituted by 2, 12 and the membrane roof 14 is continuously inclined in the direction perpendicular to the paper surface in the figure, and artificial snow is accumulated on the inclined floor surface 18 to form a slope. , You can slide on the snow.

The membrane roof 14 is inflated by injecting air into the inside in a solid line state in FIG.
Further, the two-dot chain line state indicates a state in which the internal air pressure is removed and the air is deflated. The membrane roof 14 is an outer wall 12,
Cable 20 installed between the upper ends of 12 (see FIG. 2)
Supported by. A machine room 24 and a lift room 26 are provided outside the outer walls 12, 12, and an air conditioner, an artificial snowmaking machine, a snow gun, etc. are installed in the machine room 24.

As shown in FIG. 2, the membrane roof 14 has an outer membrane 30 formed of a waterproof flexible membrane, and a heat insulating membrane 32 disposed inside the outer membrane 30 (lower side in FIG. 2). (Indicated by a satin-like shape in the figure) to form a double film structure. The outer film 30 and the heat insulating film 32 are separated by a predetermined distance, and an air layer 34 is provided between the outer film 30 and the heat insulating film 32.

The outer film 30 is formed by connecting a plurality of film bodies and covers the large space 16 in an airtight manner. The heat insulating film 32 is formed by forming a heat insulating material made of a flexible closed cell in a film shape. The heat insulating film 32 has a small diameter vent hole 36.
Are formed, and the membrane roof 14 is formed through these ventilation holes 36.
The pressurized air supplied to the large space 16 at the time of inflation is supplied into the air layer 34, and the outer film 30 and the heat insulating film 32 are
The membrane roof 14 is tensioned by inflating between.

The outer membrane 30 and the heat insulating membrane 32 are suspended auxiliary membranes 38 arranged in the width direction (the wiring direction of the cable 20) and the length direction (the extending direction of the outer wall 12) of the membrane roof 14. , 40 are connected to each other. The suspending auxiliary films 38 and 40 are fixed to the outer film 30 and the heat insulating film 32 via attachment films 42 that are fused to both sides of the suspending auxiliary films 38 and 40. In addition, the through holes 4 are formed in the hanging auxiliary films 38 and 40, respectively.
4 is formed, and the space portions defined by these suspending auxiliary films 38 and 40 communicate with each other.

The membrane roof 14 is adapted to be supported by the cable 20 via a suspended main membrane 46. The hanging main membrane 46 is continuously provided corresponding to the routing position of the cable 20, and the upper end portion and the intermediate portion thereof are the hanging main membrane 4 respectively.
It is fixed to the outer film 30 and the heat insulating film 32 via the attachment films 42 that are fused to both sides of 6. And the cable 20
Is attached to the lower end of the hanging main film 46 via a cable fixing member 48.

The cable fixing member 48 is the cable 2
0 and a pair of holding plates 50, 50 for sandwiching the lower end of the hanging main membrane 46 from both sides. The holding plates 50, 50
The cable 20 and the hanging main film 46 are sandwiched, and the lower ends thereof are fixed by the lock pins 52, and the upper ends are fixed together with the hanging main film 46 by the lock pins 54.

The lower end of the hanging main membrane 46 is wound around a continuous reinforcing cord 56 as shown in FIG.
The folded-back portion is polymerized and fused, and the polymerized portion 46
Eyelets 58 for inserting the lock pin 54 are attached to a. The lock pin 54 is attached to the pressing plate 5.
0, 50 and the presser plate 5 when it is inserted into the eyelet 58.
A spring washer 60 is provided on one side of the 0, 50 and a flat washer 62 is provided on the other side.

In the membrane roof 14 of the present embodiment having the above-described structure, the outer membrane 30 and the heat insulating membrane 32 are formed in a double structure with the air layer 34 interposed therebetween, and the outside air temperature is within the large space portion 16. It is designed to prevent it from being affected. At this time, since the heat insulating film 32 is formed of a heat insulating material made of a flexible closed cell in a film shape, a large heat insulating effect can be exerted together with the air layer 34. The air layer 3
4 is a through hole 4 formed in the suspension auxiliary films 38 and 40.
It is desirable that air (cold air or warm air) be circulated through No. 4.

Therefore, during the summer, for example, the outside temperature is 3
Even if the temperature is 0 degree C, the internal temperature of the large space portion 16 is -3 to
In the artificial ski resort 10 that needs to be maintained at 5 degrees C, the thermal insulation effect of the membrane roof 14 can significantly reduce the influence of the outside temperature on the room. Therefore, it is possible to reduce the amount of energy consumption for air conditioning the artificial ski resort 10 and to downsize the air conditioner.

Further, although the large heat insulating effect is exerted as described above, the membrane roof 14 is constituted by the double structure of the outer membrane 30 and the heat insulating membrane 32. The number of points is reduced from the triple structure of an outer membrane, an inner membrane, and a heat insulating layer that are conventionally configured, and a significant weight reduction is achieved. Therefore, it is possible to set the internal pressure of the large space 16 required to inflate the membrane roof 14 to a low level, and it is possible to downsize the blower for generating the internal pressure.

The artificial ski resort 10 is used in this embodiment.
However, the present invention can be applied to other large space facilities, for example, a membrane roof structure stretched around a general dome or the like, without being limited to this. Is.

[0021]

As described above, in the heat insulating structure of the membrane structure of the present invention, a heat insulating film formed in a film shape with a heat insulating material made of a flexible closed cell is provided inside the outer film. Since the air layer is provided between the outer film and the heat insulating film, the heat insulating film and the air layer work together to form a large heat insulating film despite the fact that the film structure can be configured as a double structure. It can be effective. Further, by being configured as such a double structure, it is possible to exhibit various excellent effects that the number of constituent parts of the membrane structure can be reduced and the weight reduction of the membrane structure can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an artificial ski resort to which the present invention is applied.

FIG. 2 is an enlarged cross-sectional view of a main part taken along the line AA in FIG. 1 showing an embodiment of the present invention.

FIG. 3 is an enlarged view of part B in FIG.

FIG. 4 is an enlarged view of an end portion of the hanging main membrane used in one embodiment of the present invention.

[Explanation of symbols]

 10 Artificial Ski Area (Large Space Facility) 12 Outer Wall 14 Membrane Roof 20 Cable 30 Outer Membrane 32 Insulating Membrane 34 Air Layer

Claims (1)

[Claims] 1. An outer membrane that airtightly covers the inside is provided, and
A film structure characterized in that a heat insulating film formed in a film shape with a heat insulating material made of a flexible closed cell is provided inside the outer film, and an air layer is provided between the outer film and the heat insulating film. Thermal insulation structure for things.