JP2001303795A - Pneumatic structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide pneumatic structural body being excellent in workability such as transport, construction and removal, securing an activity space causing no water leakage even in rainy weather time and snowfall time of a small quantity and being endurable even against large wind pressure of a wind speed not less than 10 m/s without increasing film material strength and internal pressure. SOLUTION: In this pneumatic structural body for forming a three- dimensional structure by injecting pressurized gas via an air supply exhaust port into pneumatic chamber of a double membrane structure formed of an upper surface membrane material and a lower surface membrane material, rib-shaped connecting membrane materials connecting the upper surface membrane material and the lower surface membrane material and having air vents are arranged in the pneumatic structural body, and an interval L between the adjacent rib-shaped connecting membrane materials is set 0.5 to 1.5 m.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a part of a work space and / or a living space such as a construction site for civil engineering work, a construction site for repairing and painting a ship, a temporary exhibition space, a ceremonial occasion, a ballpark, and the like. // The structure is simple and lightweight to cover the whole area and enable work even in rainy weather and snowfall. It can withstand large wind pressure and can be folded small, so it is easy to set up and remove, and easy to carry. The present invention relates to an air film structure that can be performed in a short time.

[0002]

2. Description of the Related Art Generally, in outdoor work, work is stopped when it rains or snowfalls, and the work is continued after rainfall or snowfall stops. In such a case, as a method of securing a work space so that the work can be continued even in rainy weather or snowfall, a frame made of pipe material etc. has been exposed from the wall of a building or the like, and a sheet has been used. There is a way to cover. However, in such a conventional method, when it is necessary to cover a wide working space, a member for covering the space is enlarged, and a frame weight such as a pipe or a square member is increased.
Transporting, setting up and dismantling required dedicated scaffolding and construction machinery.

[0003] Further, since such a structure is usually installed semi-permanently, it is necessary to have a robust structure that can withstand a large wind pressure in a strong wind such as a typhoon, and the weight becomes extremely heavy. In addition, it is necessary to use pipes or square members having complicated structures or large shapes.

[0004] However, there are many demands for securing a predetermined work space and / or living space (hereinafter, this space is referred to as "active space") for a certain period of time instead of the semi-permanent roof as described above. .

[0005] In response to the requirement that an active space only needs to be secured for a certain period, a lightweight and simple air film structure is proposed in Japanese Patent Application Laid-Open No. 9-144382. However, in this air film structure, 10
There is a problem that buckling occurs and is crushed by a strong wind exceeding m / s, and an active space cannot be secured.

Therefore, in order to provide a structure that can withstand the external load of wind and snow, it is conceivable to increase the internal pressure of the air film structure. However, in order to secure the internal pressure to withstand use in a required environment. In addition, the size of the blower for sending high-pressure air increases, and the air film itself must have a large film material strength to withstand the applied high internal pressure. There was a problem that it became large. For this reason, there is an unavoidable problem that handling becomes poor during transportation, construction, dismantling, and the like.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems at the time of installing or removing a large air film body.
When securing a wide range of activity space with a large air film body, it is excellent in workability such as transport, construction and removal, ensuring an active space free of water leakage even in rainy weather or a small amount of snow, and membrane material An object of the present invention is to provide an air film structure capable of withstanding a large wind pressure of 10 m / s or more without increasing strength and internal pressure.

[0008]

Means for Solving the Problems The inventors of the present invention have made intensive studies to achieve the above object, and as a result, have set a specific spacing between rib-shaped connecting film materials for connecting the upper film material and the lower film material. It was determined that a desired air film structure could be obtained when controlling to the range.

Thus, according to the present invention, (a) a three-dimensional structure is formed by injecting a pressurized gas through an air supply / exhaust port into an air chamber having a double film structure formed by an upper film material and a lower film material. In the air film structure, a rib-shaped connection film material having an air hole, which connects the upper film material and the lower film material, is provided in the air film structure, and adjacent ribs are provided. An air film structure characterized in that the distance L (m) between the connection film materials satisfies the following formula (1); (b) the upper film material and / or the lower film material are polyester fibers, polyamide fibers, and aramid; Polyurethane, acrylic rubber, fluorine rubber, vinyl chloride resin on one or both sides of a substrate woven or knitted with at least one fiber selected from the group consisting of fibers, carbon fibers, polyolefin fibers, and polyarylate fibers Elast consisting of etc. The air membrane structure according to (a), wherein the air membrane structure is a membrane material coated with a carbon material, and (c) the air membrane structure is provided at the position closest to the grounding portion when the three-dimensional structure is formed, among the ventilation holes provided in the rib-shaped connection membrane material. The air film structure according to (a) or (b), wherein the vent hole provided is located closer to the ground portion than the air supply / exhaust port, and (d) a communication hole is provided at the air chamber side end of the air supply / exhaust port. (A) the air film structure according to any one of (a) to (c), to which a film material or a mesh-like fabric having the following is attached;
00 g / m ² , tensile strength 10-60 kN / m, tear strength 1
The air film structure according to any one of (a) to (d), which is a film material having a flow rate of 5 to 50 N and an air permeability of 0.001 m ³ / sec / m ² or less.

[0010]

(Equation 2)

[0011] The method of measuring the air permeability is based on JIS L10.
According to the 96 General Textile Test Method, a pressure of 124.5 Pa was applied to the textile, and the amount of air passing through the textile was determined.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention described above will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of the air film structure of the present invention, and is a perspective view partially including a cross-sectional view.

In FIG. 1, reference numeral 1 denotes an air film structure of the present invention (hereinafter, may be simply referred to as a “film body”). It is substantially composed of a surface film material and a rib-shaped connection film material indicated by 4. The ground portion between the film body 1 and the ground is formed by extending the upper surface film material and / or the lower surface film material.

The upper surface film material 2 and the lower surface film material 3 make the film body 1 a double film material, and pressurized air is injected into an air chamber formed between the double film materials. By doing so, for example, a roof-like three-dimensional shape is formed.

The rib-like connecting film member 4 connects the upper film member 2 and the lower film member 3 up and down at a predetermined interval, so that even when the external environment changes due to a strong wind, snow, or the like, the roof-like film member 4 can be used. It also plays a role in maintaining a stable body shape. At this time, since the air chamber of the double membrane material is partitioned into a large number of air chambers by the rib-shaped connection film material 4, the rib-shaped connection film is formed so that pressurized air flows between the air chambers. The material 4 is provided with a vent hole 6. For this reason, when pressurized gas is injected into any of the air chambers, the air spreads over all the air chambers of the film body 1 to form the air film structure 1 having a predetermined three-dimensional roof shape.

Further, in FIG. 1, reference numeral 5 denotes an outer rib, and the outer rib 5 is provided on the upper film material 2 and / or the lower film material 3.
And the same film material. Reference numeral 7 denotes an air supply / exhaust port for injecting pressurized air into the air chamber of the film body 1 or exhausting the air injected from the air chamber through the air supply / exhaust port 7.

Therefore, the air supply / exhaust port 7 is
When a pressurized air is injected in a short time to set up the air film body 1 or when the film body 1 is folded and stored, a plurality of the air film bodies 1 are quickly exhausted. Is preferred. In FIG. 1, one rib-like connecting film member 4, an upper film member 2 and / or a lower film member 3 in contact with the rib-like connecting film member 4,
Further, one air chamber surrounded by four members of the adjacent rib-shaped connecting film member 4 is called a rim, and it is preferable that one or more air supply / exhaust ports 7 is attached to this one rim. Needless to say, the shape and the number are appropriately determined depending on conditions such as the shape, size, structure, and installation status of the film body 1.

Further, referring to the relationship between the air holes provided in the rib-shaped connecting film material and the air supply / exhaust ports, it is most likely that the three-dimensional structure is formed among the air holes provided in the rib-shaped connecting film material. It is preferable that the ventilation hole (for example, 10 in FIG. 1) provided at a position near the ground portion is closer to the ground portion than the air supply / exhaust port 7 as shown in FIG.

By setting the positions of the ventilation holes as described above, when the air film structure is folded, air remaining in the vicinity of the ground portion of the air chamber can be efficiently exhausted, and the air film structure can be efficiently removed. Removal and transportation are easy.

In the air film structure of the present invention, it is important that the distance L (m) between adjacent rib-shaped connecting film materials (this may be referred to as a rim width) satisfies the following expression (1). is there.

[0021]

(Equation 3)

In the case of L <0.5 m, the rib-like connecting film members 4 are arranged at narrow intervals in FIG. 1 and the number of the rib-like connecting film members increases, so that the weight as a whole increases, and The amount of dough increases. Therefore, there is a problem that the installation / removal work and carrying around are difficult, and the production cost is increased.

On the other hand, when L> 1.5 m, when a pressurized gas is injected from 7 to form a roof-shaped three-dimensional structure, a large tension is applied to the rib-shaped connecting film material 4 due to the internal pressure in the air chamber. This causes a problem that a tear is generated from the portion of the ventilation hole 6 and a breakage of the rib-like connecting film material occurs.

FIG. 2 is a side view of the air film body 1 shown in FIG. 1. When a pressurized gas is injected into the film body 1 from 7 to form a roof-like three-dimensional structure, air is blown. Due to the internal pressure in the room, the upper surface film material 2 takes a shape as shown in a. On this occasion,
If L> 1.5 m, the film 1
Since the shape b of the portion where the film comes into contact with the ground bulges downward in the same manner as the shape a, a problem arises that the shielding property of rain and wind at the ground contact portion of the film body 1 is reduced.

As the upper film material and / or the lower film material of the present invention, for example, at least one fiber selected from the group consisting of polyester fiber, polyamide fiber, aramid fiber, carbon fiber, polyolefin fiber and polyarylate fiber. A film material obtained by coating one or both surfaces of a woven or knitted fabric made of polyurethane, acrylic rubber, fluororubber, vinyl chloride resin, or the like can be suitably used. By using such a film material, the function as an air film structure can be easily exhibited, and it is lightweight and easily foldable, so that it can be freely expanded and stored.

The air permeability of the upper surface film material 2 and the lower surface film material 3 is set to 0.
001 m ³ / sec / m ² or less, and the air permeability is substantially zero, that is, 0 m ³ / sec / m ^2.
It is more preferable to set If the air permeability of these membrane materials exceeds 0.001 m ³ / sec / m ² , the pressure in the air chamber for maintaining the membrane body 1 in a normal roof-like shape is reduced, and the shape retention is reduced. This is because it may disappear.

Further, it is desirable that the weight (weight) of each of the upper surface film material 2, the lower surface film material 3, and the rib-shaped connecting film material 4 is 30 to 200 g / m ² . If the weight (basis weight) is within the above range, the film 1
The reason for this is that the weight of the film itself can be reduced, and the work demand that the installation and removal of the membrane body 1 can be performed quickly and easily can be sufficiently satisfied.

Further, if the weight (basis weight) is within the above range, the mechanical properties such as the tear strength and the tensile strength of the film body 1 can be measured by the tensile strength of 10 to 60 kN / m and the tear strength of 15 to 50.
It is easy to control to the range of N, and it is possible to obtain a film body that can withstand severe external conditions such as strong wind or snow.

On the other hand, the basis weight of the film body 1 was 200 g /
exceeds m ^2, construction and dismantling are cumbersome, with takes time to set-up, which may carry difficult. On the other hand, if the basis weight of the film body 1 is less than 30 g / m ^2, under severe external conditions such as strong wind or snow,
In some cases, the mechanical properties of the film, which can maintain the roof-like three-dimensional shape, are reduced, and stable use is difficult.

FIG. 3 is an enlarged view showing an embodiment in which a film material 8 having a communication hole is attached to an end of the air supply / exhaust port 7 of the air film structure on the air chamber side.

FIG. 4 is an enlarged view showing an embodiment in which a mesh-like material 9 is attached to the air chamber-side end of the air supply / exhaust port 7 of the air film structure.

By mounting 8 or 9,
A pressurized gas is injected into the membrane body 1 from 7 using a blower or a compressor to form a roof-like three-dimensional structure during or when the formation is completed. It is possible to prevent foreign matter from entering.

When the membrane 1 is folded, it is necessary to discharge air from the air outlet 7. However, since the air outlets 8 and 9 are attached, the shape of the air outlet can be maintained, and the air can be efficiently discharged in a short time. Can be discharged. Needless to say, the shape of 8 or 9 and the number of 8 communication holes are appropriately determined depending on conditions such as the shape, size, structure, and installation status of the film body 1.

[0034]

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

Example 1, Comparative Example 1 A polyester fiber coated with a polyurethane elastomer, having a basis weight of 55 g / m ² , a tensile strength of 400 N / 50 mm, a tear strength of 20 N, and an air permeability of 0.0002 m ³ / m ² / sec.
Was used as an upper surface film material, a lower surface film material, and a rib-like connecting film material to produce an air film structure having the shape shown in FIG.
At this time, the interval L (m) between the adjacent rib-shaped connection film materials is set to 0.1.
73 m (Example 1) and 0.47 m (Comparative Example 1).
When a pressurized gas was injected into the obtained air film structure, the active space area was 150 m ² in all cases.
Of the air film structure of Example 1 was 1.3 times the weight of the air film structure of Example 1, and it took 45 minutes to set up and 35 minutes to remove.
The size when the air film structure of Comparative Example 1 was folded was 0.8 × 0.8 × 0.8 × 0.8 ×
It was 0.8 m. On the other hand, the air film structure of Example 1 requires only 35 minutes for installation and 25 minutes for removal, and the size when folded is 0.7 m × 0.
It was 7 mx 0.6 m. As described above, the air film structure of Example 1 was easier to transport, set up, and remove than the air film structure of Comparative Example 1.

[Example 2] In Example 1, among the air holes provided in the rib-shaped connecting film material, the air hole provided at the position closest to the ground portion when the three-dimensional structure was formed (see FIG. 1). 1
0) was carried out in the same manner as in Example 1 except that 0) was provided at a position farther from the ground contact portion than the air supply / exhaust port. The active space area of the obtained air film structure is 150 m ² and the construction is 35 m2.
It took 25 minutes to remove it, but because some air remained near the ground contact area, the size when folded was vertical × horizontal ×
The height was 0.7mx0.7mx0.65m, respectively.

Comparative Example 2 The same operation as in Example 1 was carried out except that the distance L (m) between the adjacent rib-like connecting film materials was changed to 1.6 m. When a pressurized gas was injected into the obtained air film structure, the grounded portion of the air film structure swelled greatly, resulting in an unstable structure. Also, when used in rainy weather, raindrops entered the active space from the ground contact area.

[0038]

According to the present invention, the workability of transport, construction, and removal is excellent, an active space free of water leakage is provided even in rainy weather or a small amount of snow, and the strength and internal pressure of the membrane material are increased. Thus, an air film structure capable of withstanding a large wind pressure of 10 m / s or more without wind is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an air film structure according to the present invention, a part of which includes a cross-sectional view.

FIG. 2 is a side view showing an embodiment of the air film structure of the present invention.

FIG. 3 is an enlarged view showing an attached state of a membrane material having a communication hole.

FIG. 4 is an enlarged view showing an attached state of a mesh-like cloth.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air film structure 2 Upper surface film material 3 Lower surface film material 4 Rib-shaped connection film material 5 Outer rib 6, 10 Vent hole 7 Air supply / exhaust port 8 Film material having a communication hole 9 Mesh-like fabric a Bulge b ground contact

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Seigo Inoue 2-1-1 Uchisaiwai-cho, Chiyoda-ku, Tokyo Teijin Limited F-term (reference) 2E141 AA01 BB01 CC05 DD11 EE04 EE33

Claims (5)

[Claims] An air film structure having a three-dimensional structure formed by injecting a pressurized gas into an air chamber having a double film structure formed by an upper film material and a lower film material through an air supply / exhaust port. The air film structure is provided with a rib-shaped connecting film material having a ventilation hole for connecting the upper film material and the lower film material, and a gap L between adjacent rib-shaped connecting film materials is provided. (M) which satisfies the following formula (1). (Equation 1) 2. The method according to claim 1, wherein the upper film material and / or the lower film material is woven or formed of at least one fiber selected from the group consisting of polyester fiber, polyamide fiber, aramid fiber, carbon fiber, polyolefin fiber, and polyarylate fiber. The air film structure according to claim 1, wherein the air film structure is a film material in which one or both surfaces of a knitted base material are coated with an elastomer made of polyurethane, acrylic rubber, fluorine rubber, vinyl chloride resin or the like. 3. A ventilation hole provided at a position closest to the grounding portion when the three-dimensional structure is formed, of the ventilation holes provided in the rib-shaped connecting film material, is closer to the grounding portion than the air supply / exhaust port. The air film structure according to claim 1, wherein the air film structure is located at a position. 4. The air film structure according to claim 1, wherein a film material or a mesh material having a communication hole is attached to an end of the air supply / exhaust port on the air chamber side. 5. The method according to claim 1, wherein the upper surface film material and / or the lower surface film material have a basis weight of 3.
0 to 200 g / m^Two, Tensile strength 10-60 kN / m, tear
Powerful 15-50N, and air permeability 0.001m ^Three/ Sec /
m^TwoThe following film material is described in any one of claims 1 to 4.
Air film structure.