WO2018147374A1 - Inflatable structure - Google Patents

Abstract

Provided is an inflatable structure which can be of various shapes, can be used for applications other than jacks, and can provide a necessary inflation height. The present invention has: a bag body 2 which is formed from a resin film; a fluid supply unit 3 for supplying fluid into the bag body 2; and an enclosure 4 which encloses the bag body 2. The enclosure includes three or more woven endless fabric strips, which enclose the outer periphery of the bag body 2 while intersecting each other at two portions on both sides of the bag body 2 and which are connected at the intersection portion thereof.

Description

Inflatable structure

The present invention relates to an inflatable structure that is expanded by being filled with a fluid such as air or water to form a structure.

Conventionally, as one type of this type of inflatable structure, an air inflatable air jack formed by a flexible pressure-resistant bag-like body having an air inlet is known (for example, Patent Documents 1 and 2). etc).

Japanese Patent Laying-Open No. 2015-0778027 Patent No. 6017103 specification

The above conventional air jack has high pressure resistance and strength despite its light weight, and is expected to be applied to other applications.

However, since it is generally flat and flat in plan view, diversion is limited to other uses. In addition, the expansion in the height direction may be insufficient, and it is necessary to use several air jacks stacked.

Therefore, the main object of the present invention is to provide an inflatable structure that can be used for applications other than jacks and can obtain the necessary expansion in the height direction.

In order to achieve the above object, a first aspect of an inflatable structure according to the present invention includes a bag formed of a resin film, a fluid supply unit for supplying fluid into the bag, and the bag An enclosure that surrounds the bag, and the enclosure includes three or more endless belt-like woven fabrics, each of the three or more endless belt-like fabrics intersecting each other at two locations on both sides of the bag body. While surrounding the outer periphery of the bag body, the bag body is connected at a crossing portion.

According to a second aspect of the inflatable structure according to the present invention, in the first aspect, the fluid supply unit includes a flexible hose attached to the bag, and the flexible hose It passes between the bag body and the surrounding body and extends from between the adjacent endless belt-like woven fabrics.

According to a third aspect of the inflatable structure according to the present invention, in the first aspect, the enclosure includes a first enclosure that encloses the bag body, and a second enclosure that encloses the first enclosure. The first envelope and the second envelope are disposed so that the endless belt-like woven fabrics intersect each other.

According to a fourth aspect of the inflatable structure according to the present invention, in the first aspect, a tubular shape that is extrapolated to the enclosure and retains the bag in a cylindrical shape when the bag is inflated. An exterior body is further provided.

According to a fifth aspect of the inflatable structure according to the present invention, in the first aspect, at least a part of the envelope that is wrapped around an outer periphery of the envelope and encloses the bag when the bag is inflated. A ring-shaped member is further provided to keep the periphery smaller than the maximum expansion diameter of the bag body.

The sixth aspect of the inflatable structure according to the present invention further includes a waterproof coating in the first aspect.

The inflatable structure according to the present invention can be formed into a spherical shape, a cylindrical shape, a bowl shape, and the like, and can be used for various applications in addition to an air jack and is necessary in the height direction. Expansion can be obtained.

It is a top view which shows the bag which is a component of the inflatable structure which concerns on this invention. It is a longitudinal cross-sectional view of the bag body of FIG. It is a top view which shows the inflatable structure which wrapped the bag of FIG. 1 with the enclosure which is a component of this invention. It is a perspective view which shows the state which expanded the bag body of the inflatable structure of FIG. It is a perspective view which decomposes | disassembles and shows the endless belt-like fabric shown in FIG. It is a top view which shows the inflatable structure which wrapped the enclosure (1st enclosure) shown in FIG. 3 with another enclosure (2nd enclosure). FIG. 7 is a perspective view showing an inflatable structure obtained by waterproof covering the enclosure shown in FIG. 6 with a part of the waterproof cover cut away. It is a perspective view which shows the inflatable structure to which the cylindrical exterior body which is another component of this invention was mounted | worn. It is a perspective view which shows the inflatable structure which wound the ring-shaped member which is another component of this invention.

Embodiments of the inflatable structure according to the present invention will be described below with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same or similar component through all embodiment.

The inflatable structure 1 includes an airtight bag 2 (FIGS. 1 and 2) formed of a resin film. For example, the bag body 2 includes two resin films 2a and 2b formed in a predetermined shape such as a circular shape, and the peripheral edge portion 2c of the two resin films 2a and 2b has a width of several mm to several tens of mm. By carrying out welding (thermal welding, ultrasonic welding, or high-frequency welding), it is possible to form a bag having a predetermined shape. The welded peripheral edge 2c can be reinforced by adhering a duct tape (not shown). The bag body 2 can be formed as a double bag body by putting another bag body 2 in one bag body 2 or can be triple or quadruple.

As the resin films 2a and 2b forming the bag body 2, a multilayer film or a single layer film excellent in gas barrier properties is preferably used. For example, the oxygen permeability is 40 cc / m ² · atm · day or less and the moisture permeability is A multilayer film or a single layer film of 8 g / m ² · day or less may be used.

In this embodiment, the resin films 2a and 2b forming the bag body 2 have a thickness of 70 μm, a tensile strength of 45 MPa, a tensile elongation of 350%, a tear strength of 140 N / mm, an impact strength of 140 N · cm, and a piercing. Triple nylon (trade name) manufactured by MICS Chemical Co., Ltd. having a strength of 5.0 N, an oxygen permeability of 40 cc / m ² · atm · day, and a moisture permeability of 8 g / m ² · day is used.

Resin films 2a and 2b forming bag 2 are, for example, thermoplastic polyurethane film, polylactic acid film, polyester film formed of PET, PEN, PBT, EVOH, PVA, barrier nylon, etc. instead of triple nylon Single layer film such as a barrier resin film, or multilayer film, for example, 4 layer film (for example, Diamilon M-G708 (Diamilon is a registered trademark)), 5 layer film (for example, made by MICS Chemical Co., Ltd. A barrier (HB)) or the like can also be used.

The bag body 2 includes a fluid supply unit 3 for supplying fluid such as compressed air into the bag body 2. The fluid supply unit 3 includes a flexible hose 3a. The flexible hose 3a can be formed by, for example, a pressure resistant hose made of a special polyurethane resin. One end of the flexible hose 3a is inserted into the bag body 2 and attached to the bag body 2 in an airtight and liquid-tight manner. A connector 3b such as a hose coupler can be attached to the other end of the flexible hose 3a. The fluid supplied into the bag body 2 flows out of the bag body 2 by, for example, connecting the connector 3b to a check valve built-in type or by connecting an on-off valve (not shown) separately to the connector 3b. Outflow prevention means for preventing may be provided. Although not shown, by connecting a connecting tool such as a hose that supplies fluid from a fluid supply source such as a compressor, a manual air inlet, and a water tap to the connecting tool 3b, the fluid supply source can be used as a bag body. The fluid can be supplied into 2.

3 to 5, the bag body 2 is wrapped by the enclosure body 4. FIG. 3 is a plan view showing a state where air is not injected into the bag body 2 wrapped by the envelope body 4. FIG. 4 is a perspective view showing a state in which air is injected into the bag body 2 wrapped with the envelope body 4. FIG. 5 is an exploded perspective view showing the four endless belt-like woven fabrics 4a, 4b, 4c, and 4d constituting the enclosure for easy understanding.

The bag body 2 is entirely wrapped by the envelope body 4. The envelope 4 includes three or more endless belt-like woven fabrics. 3 and 4 show the envelope 4 that wraps the bag 2 with four endless belt-like woven fabrics 4a, 4b, 4c, and 4d. The number and size of the endless belt-like woven fabrics 4a, 4b, 4c, and 4d can be appropriately changed depending on the size of the bag body 2 to be surrounded. In the illustrated example, the four endless belt-like woven fabrics 4a, 4b, 4c, and 4d have the same peripheral length, but the outer peripheral side may be longer than the inner peripheral side.

Each of the endless belt-like woven fabrics 4a, 4b, 4c, and 4d forming the enclosure 4 is wound in order from the inside so as to surround the outer periphery of the bag body 2 while intersecting each other at two locations on both sides of the bag body 2. ing. Each of the endless belt-like woven fabrics 4a, 4b, 4c, and 4d is connected by a connecting means 4n such as sewing at a portion 4X that intersects each other. In the endless belt-like woven fabrics 4a, 4b, 4c, and 4d, preferably, when the bag body 2 is inflated, the adjacent endless belt-like woven fabrics partially overlap each other, and no gap is formed between the adjacent endless belt-like woven fabrics. Are arranged as follows. For convenience of illustration, in FIGS. 3 and 4, only one portion is shown on the upper surface of the portion 4 </ b> X that intersects the upper and lower sides of the bag body 2, and the other one is hidden on the lower surface. It is not shown in the figure.

The endless belt-like woven fabrics 4a, 4b, 4c, and 4d are belt-shaped woven fabrics woven in an endless belt shape with synthetic fiber warp yarns and synthetic fiber weft yarns, or synthetic fiber warp yarns and synthetic fiber weft yarns. It can be formed by a woven fabric made by stitching both ends of the woven fabric into an endless shape. As the synthetic fibers used for the endless belt-like woven fabrics 4a, 4b, 4c, and 4d, aramid fibers, polyester fibers, polypropylene fibers, and the like are preferably used. The endless belt-like woven fabrics 4a, 4b, 4c, and 4d are preferably woven fabrics excellent in pressure resistance and wear resistance, and are used for fire fighting woven in plain or twill using synthetic fiber warps and synthetic fiber wefts. A synthetic fiber woven fabric used for a hose can be preferably used. Such endless belt-like woven fabrics 4a, 4b, 4c, and 4d also have non-stretchability.

By filling the bag body 2 with a fluid such as compressed air, the envelope body 4 is expanded by the bag body 2. The bag body 2 is designed so that the volume of the bag body 2 is larger than the volume of the maximum space surrounded by the envelope body 4. Accordingly, when the bag body 2 is filled with a fluid such as compressed air, the bag body 2 and the enclosure 4 are brought into a pressure contact state, and when the space surrounded by the enclosure 4 reaches the maximum, that of the bag body 2 is reached. It is limited by the bulge enclosure 4 described above. Note that FIG. 3 shows the bag body 2 in a simple circle by simplifying the illustration, but actually, the bag body 2 in a state not filled with fluid is crumpled inside the enclosure 4. ing.

The flexible hose 3a passes between the bag body 2 and the envelope body 4 and extends from between the adjacent endless belt-like woven fabrics 4a and 4d. Therefore, when the bag body 2 is inflated, the bag body 2 and the envelope body 4 are sandwiched between the bag body 2 and the envelope body 4.

For example, air of about 0.01 to 1.0 MPa is pressed into the bag body 2, and as a result, the flexible hose 3 a is firmly held between the bag body 2 and the envelope body 4.

As shown in FIG. 3, when the bag body 2 is not inflated, the four endless belt-like woven fabrics 4a, 4b, 4c, and 4d have a substantially polygonal shape (in the illustrated example, approximately The bag body 2 is wound so as to exhibit an octagonal shape. In addition, the planar view shape when the bag body 2 is inflated becomes a rounded shape.

As shown in FIG. 4, when the fluid is supplied to the bag body 2 through the fluid supply unit 3 and the fluid 2 is inflated, the inflatable structure 1 swells in a spherical shape. The inflatable structure 1 swells in a spherical shape, so that it can obtain a higher height than a conventional flat and square air jack having a plan view. A conventional flat air jack that is flat and has a square shape in plan view is limited in height when expanded because the corner portions of the four corners cannot expand.

The enclosure 4 is likely to have a gap between the adjacent endless belt-like woven fabrics 4a, 4b, 4c, and 4d at a “corner” portion that exhibits a substantially polygonal shape when not inflated. Therefore, as shown in FIG. 6, a second surrounding body 4 ′ that further wraps the surrounding body (first surrounding body) 4 that directly wraps the bag body 2 can be provided so that this gap does not occur. Each of the endless woven fabrics 4a ′, 4b ′, 4c ′, and 4d ′ of the second enclosure 4 intersects with each of the endless woven fabrics 4a, 4b, 4c, and 4d of the first enclosure 4. It is arranged. The endless belt-like woven fabrics 4a ′, 4b ′, 4c ′, and 4d ′ of the second enclosure 4 ′ are set to have a longer circumference than the endless belt-like fabrics 4a, 4b, 4c, and 4d of the first envelope 4 be able to.

As shown in FIG. 7, the waterproof body 5 ′ formed as described above is provided with a waterproof coating 5 made of an elastomer material such as a thermoplastic polyurethane elastomer or other synthetic resin material, thereby providing waterproofness and durability. You can have it. The waterproof coating 5 can be provided on the outermost side of the inflatable structure.

In another embodiment, as shown in FIG. 8, a tubular exterior body 6 is extrapolated outside the enclosure 4. The tubular exterior body 6 can be formed of the same material as the endless belt-like woven fabric. In order to keep the bag body 2 in a cylindrical shape when the bag body 2 is inflated, the inner diameter M of the cylindrical outer casing 6 is ½ of the circumferential length of the endless woven fabrics 4a, 4b, 4c, 4d (see FIG. Is suitably set within a range of 1/15 to 1/3 of the circumference of the endless woven fabric. The cylindrical exterior body 6 is fixed to the enclosure 4 by sewing or an adhesive. Although not shown, in order to provide waterproofing as in the case of the enclosure 4, an outer surface of the inflatable structure 1 shown in FIG. 8 is coated with an elastomer material such as a thermoplastic polyurethane elastomer or other synthetic resin material. Can do. By appropriately setting the dimensions of the tubular exterior body 6, the inflatable structure 1 can be formed in a columnar shape with various dimensional ratios.

In yet another embodiment, as shown in FIG. 9, a ring-shaped member 7 is wound around the outer periphery of the enclosure 4. The ring-shaped member 7 is preferably fixed to the enclosure 4 at least partially so as not to be misaligned by fixing means 7a such as adhesion or adhesion. Although not shown, a waterproof coating similar to the waterproof coating 5 shown in FIG. 7 can be covered on the envelope 4 around which the ring-shaped member 7 is wound.

The ring-shaped member 7 is provided with a ring-shaped member 7 for holding the periphery of at least a part of the envelope 4 that wraps the bag body 2 when the bag body 2 is inflated to a diameter smaller than the maximum expansion diameter of the bag body 2. The ring-shaped member 7 can be formed of a string, a thread, a belt, a tape, or the like.

By providing such a ring-shaped member 7, when the inflatable structure 1 is inflated, as shown in FIG. 9, the lateral expansion (W direction in FIG. 9) of the bag body 2 is limited, and the longitudinal direction (FIG. 9). The expansion in the H direction can be increased, so that the expansion height in the height direction can be increased. In the illustrated example, the ring-shaped member 7 is five string rings wound at intervals, but the number of the ring-shaped members 7 may be appropriately selected. For example, if there is only one lace that constitutes the ring-shaped member 7, the shape of the inflatable structure 1 when it is inflated becomes a substantially saddle shape. By appropriately changing the number and diameter of the ring-shaped members 7, the height of the inflatable structure 1 can be set as appropriate.

The inflatable structure according to the present invention includes air jacks, floating fences, piers, simple piles, simple safety fences, sign poles, rollers used when moving luggage, cushions for luggage during transportation, air tent pillars It can be used for various materials such as timber, simple dredging materials, marine partitioning materials, shaft plugs in sewage pipe construction.

Further, the inflatable structure having the above-described configuration is lightweight and foldable, so that it has excellent storability and transportability and can form a robust structure by injecting fluid.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Inflatable structure 2 Bag 3 Fluid supply part 4, 4 'Enclosure 4a-4d, 4a'-4d' Endless belt-like woven fabric 5 Waterproof coating 6 Cylindrical outer body 7 Ring-shaped member

Claims (6)

A bag formed of a resin film;
A fluid supply unit for supplying fluid into the bag body;
An enclosure that encloses the bag,
The enclosure includes three or more endless belt-like woven fabrics, and each of the three or more endless belt-like woven fabrics surrounds the outer periphery of the bag body while intersecting each other at two locations on both sides of the bag body, An inflatable structure characterized in that the structures are connected to each other at intersections. The fluid supply unit includes a flexible hose attached to the bag body, and the flexible hose passes between the bag body and the enclosure, and between the adjacent endless belt-like woven fabrics. The inflatable structure according to claim 1, wherein the inflatable structure is extended. The enclosure includes a first enclosure that encloses the bag, and a second enclosure that encloses the first enclosure,
2. The inflatable structure according to claim 1, wherein the first enclosure and the second enclosure are arranged such that endless belt-like woven fabrics intersect each other. The inflatable structure according to claim 1, further comprising a cylindrical outer body that is extrapolated to the enclosure and retains the bag in a cylindrical shape when the bag is inflated. A ring-shaped member that is wound around the outer periphery of the enclosure and that holds at least a part of the circumference of the enclosure that wraps the bag body when the bag body is inflated to a diameter smaller than the maximum expansion diameter of the bag body; The inflatable structure according to claim 1. The inflatable structure according to claim 1, further comprising a waterproof coating.

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