JP2003247693A - Hardening type inflatable device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hardening type inflatable device realizing a hardening layer which is light weight and simple and has flexibility in the folded state before hardening. <P>SOLUTION: There are provided an airtight layer 41 in a sealed bag-state structure formed into a predetermined shape by introducing of a gas, and a hardening layer 42 laminated over the airtight layer 41 and made of a carbon fiber fabric impregnated with a thermosetting resin which generates heat by electricity. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure such as an antenna, a sun shield, and a solar array constructed in outer space, a space inflatable structure which itself is a lightweight and highly elastic structural member, or the earth. The present invention relates to a hardening type inflatable device that can be applied to a temporary house used above, an inflatable structure such as a large roof or wall, and the like.

[0002]

2. Description of the Related Art Inflatable structures have been researched and developed as support / reinforcement structures for antennas, sunshields, solar arrays, etc. arranged in outer space. The structure is one in which a sealed bag-like structure is filled with gas or the like, and a predetermined shape such as a tube shape or a balloon shape is formed by the internal pressure and used as a structure. In the case of a tubular shape, it itself becomes a unit member such as a pillar or a truss structure. In the inflatable structure of a square ring or a ring formed by combining or bending a tube-shaped inflatable structure, a film-shaped planar antenna with an antenna element mounted inside a square ring or a ring is deposited or metal is vapor-deposited. A structure in which a film surface such as a parabolic antenna having a reflective surface formed of a film is stretched can be used. Further, in the case of a balloon-shaped inflatable structure, it can itself be a reflecting surface. In the case of a solar array, the solar cell can be mounted on the membrane surface stretched by an inflatable structure of a square ring or a ring, or the solar cell can be mounted on the outer surface of the balloon-shaped inflatable structure.

FIG. 8 shows an example of a planar antenna in which a disk-shaped film surface on which an antenna element is mounted by such an inflatable structure is stretched and supported, 10 is an inflatable structure, 11 is an inflatable ring, and 12 is from the film surface. The flat antenna 13 is a membrane surface tension cable that supports and stretches the membrane surface. When a reflecting mirror is stretched instead of the plane antenna 12 made of the film surface, a lens-shaped reflecting mirror stretched by the inflatable ring 11 is also made of an inflatable structure. In order to arrange such an inflatable structure 10 in outer space such as a satellite orbit, a plane antenna 12 is used.
By winding or folding the inflatable ring 11 together with the membrane surface, and storing it in the fairing of the rocket and launching it, the inflatable structure 10 is filled with gas or urethane foam on the satellite orbit, and the structure of a predetermined shape is obtained. It is a thing. By doing so, the rolled or folded planar antenna 12 is expanded, and the membrane surface tension cable 13 uniformly stretches the periphery of the membrane surface of the planar antenna 12 to stretch it on a plane without distortion.

By thus forming the film-shaped antenna support structure with an inflatable structure, when launching a structure such as an antenna arranged in outer space with a rocket, the support structure is folded together with the antenna or wound in a small size. A flat antenna or the like can be supported and stretched by housing it in the fairing of a rocket, filling it with gas in a satellite orbit to form it into a predetermined shape, and then hardening it.

These structural characteristics are effective in arranging the equipment in the satellite orbit under the limited launch mass (payload) and fairing storage volume of the rocket,
Further, it is effective in reducing the weight of each structure of the artificial satellite arranged on the satellite orbit and reducing the launch cost. Therefore, application of the inflatable structure is widely considered as a structure suitable for an antenna, a sun shield, a solar array, etc. mounted on a satellite.

[0006] These space structures are required to have high reliability in terms of structure and resistance to space environment. When the film structure constituting the inflatable tube or the like is a single film, there is an advantage that the structure is light and simple, but the accuracy of the structure cannot be maintained unless the internal gas pressure is constantly controlled. Further, if the film structure is damaged by space debris, which is also called space dust, and the gas pressure is released, the structure may not be maintained. For this reason, it has been carried out to have a curable inflatable structure in which reinforcing fibers impregnated with a curable resin are laminated on these films, and these reinforcing measures are to increase the mass of the film. Therefore, a lightweight and highly reliable structure is desired.

As a structure that meets such various demands, a woven fabric such as aramid fiber or carbon fiber impregnated with resin as a hardened layer and a film laminated as an airtight layer is used as a film material for an inflatable structure. . The hardened layer is kept in a flexible state until the inflatable structure is inflated and expanded by the internal pressure, and is hardened after the expansion is completed. As this curing method, there have been proposed methods such as heat curing using a thermosetting resin and a method of cooling and curing after heating and melting using a cooling curing resin.

However, in any of the curing methods, it is necessary to attach a sheet heater to the cured layer for heating or to introduce a preheated gas,
It is inevitable that an inflatable structure that needs to be flexibly folded in an uncured state has an effect that it becomes difficult to fold or a device for curing becomes large.

FIG. 9 shows a typical heater heating type inflatable structure 20 which is heated and cured by a sheet-shaped heater.
The inflatable structure 20 includes the hardened layer 2 on the airtight layer 21.
2 are stacked and gas is introduced from the inflation device 24 to expand and deploy. Since the sheet-shaped heater 23 is mounted on the entire surface of the hardened layer 22, it is necessary to fold the heater 23 together when the film surface is folded, and the film thickness including the heater 23 becomes large, which makes folding difficult. It is unavoidable that the heater 23 is damaged or the heater 23 is damaged by the fold. Although not shown in this figure, since a heat insulating layer is further laminated on the heater 23, folding becomes more difficult.

A typical heated gas introduction type inflatable structure 30 for introducing a heated gas and heating and hardening is shown in FIG.
(Hiroaki Tsunoda, Yumi Senkitaya, thermosetting inflatable structure, Japanese Patent Application No. 2000-222853). Unlike the previous example, a sheet-shaped heater that prevents folding is not mounted on the airtight layer 31 and the hardened layer 32, but the hardened layer 32
The heat given to the hardened layer 32 is introduced into the inflatable structure 30 via the gas sent from the inflation device 34 and generated by the heater 35 provided outside, and the introduced gas is exhausted by the exhaust pipe 36 and the exhaust valve. It is discharged via 37 or introduced into another inflatable structure. For this reason, even if the heat insulating material 33 is attached, the heat transfer loss in the middle is large, and it is inevitable that the heating device becomes large and the capacity of the power source becomes large.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and when the inflatable structure is cured, it is possible to easily fold the cured layer before curing.
By not directly attaching the heat source for heating to the hardened layer and heating the hardened layer directly without passing through gas etc., it is lightweight, simple, and has flexibility in the folded state before hardening. An object is to provide a curable inflatable device that realizes layers.

[0012]

In order to achieve the above object, a hardening type inflatable device of the present invention comprises an airtight layer formed in a bag-like structure having a predetermined shape by introducing gas, and the airtight layer. It is characterized by comprising a hardened layer laminated in layers and impregnated with a thermosetting resin in a carbon fiber woven fabric that generates heat when an electric current flows, and an electrode for passing an electric current through the hardened layer.

Further, the curable inflatable device of the present invention comprises an airtight layer formed into a bag-shaped structure having a predetermined shape sealed by introducing gas, and a carbon layer laminated on the airtight layer to generate an electric current and generate heat. It is characterized by comprising a hardened layer in which a fiber woven fabric is impregnated with a thermoplastic resin, and an electrode for passing an electric current through the hardened layer.

Further, in the hardening type inflatable device of the present invention, an airtight layer formed by introducing a gas into a sealed bag-like structure having a predetermined shape and the airtight layer are laminated, and electromagnetic waves are emitted from the outside of the inflatable structure. It is characterized by comprising a hardened layer made of a carbon fiber woven fabric or a chemical fiber woven fabric impregnated with a thermosetting resin or a thermoplastic resin which generates heat upon irradiation.

Further, in the hardening type inflatable device of the present invention, an airtight layer formed by introducing a gas into a sealed bag-like structure having a predetermined shape and the airtight layer are laminated, and an electromagnetic wave is emitted from the inside of the inflatable structure. It is characterized by comprising a hardened layer made of a carbon fiber woven fabric or a chemical fiber woven fabric impregnated with a thermosetting resin or a thermoplastic resin which generates heat upon irradiation.

Further, the curable inflatable device of the present invention is provided with a substance which is gasified by heating inside, and an airtight layer formed in a sealed bag-like structure having a predetermined shape by gasification of the substance by heating. Laminated to the airtight layer,
A hardening layer made of carbon fiber woven fabric or chemical fiber woven fabric impregnated with a thermosetting resin or thermoplastic resin that generates heat when irradiated with electromagnetic waves, or a thermosetting resin or heat applied to a carbon fiber woven fabric that generates heat when an electric current flows. And a hardened layer impregnated with a plastic type resin.

The present invention is also characterized in that, in the above-mentioned curable inflatable device, a protective layer is provided on the outer side of the hardened layer.

Further, the curable inflatable device of the present invention comprises an airtight layer formed by introducing a gas into a sealed bag-like structure having a predetermined shape, and the airtight layer laminated on the airtight layer and foamed by irradiating an electromagnetic wave. And a foamable resin layer that undergoes a curing reaction.

Further, the present invention is characterized in that, in the above-mentioned hardening type inflatable device, a protective layer is provided outside the foamable resin layer.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a Joule thermosetting inflatable structure 40 according to a first embodiment of the present invention. Here, 41 is an airtight layer made of, for example, a film, 42 is a hardened layer made of carbon fiber woven fabric impregnated with a thermosetting resin, 43 is a heat insulating material (protective layer), 44 is an inflation device, and 45 and 46. Is an electrode provided at both ends of the hardened layer 42, 47 is an energizing cable for passing a current through the electrodes 45 and 46, and 48 is a power supply device for flowing a current through the hardened layer 42. The airtight layer 41 is formed in a sealed bag-like structure, a hardened layer 42 is laminated on the outer surface of the airtight layer 41, and a heat insulating material 43 serving as a protective layer is provided on the outer surface of the hardened layer 42. It is provided by stacking. A power supply device 48 is connected to the electrodes 45 and 46 provided at both ends of the hardened layer 42 by an energizing cable 47. An inflation device 44 is connected to the closed bag-shaped structure including the airtight layer 41 so that gas can be introduced from the inflation device 44 into the closed bag-shaped structure including the airtight layer 41. That is, the inflatable structure 40 is
Gas is introduced from the inflation device 44 into the closed bag-shaped structure made of the airtight layer 41 to inflate it into a predetermined shape such as a tube. After that, power supply 4
A current is applied to the hardened layer 42 from 8 through the energizing cable 47 and the electrodes 45 and 46. Since the hardened layer 42 is made of a carbon fiber woven fabric, Joule heat is generated by the electric resistance of the carbon fiber when the carbon fiber is energized, and the Joule heat cures the thermosetting resin. As a result, the hardened layer 42 is hardened, and the inflatable structure 40 is hardened in the expanded and expanded shape to form a hardened inflatable structure. Note that the heat insulating material 43 serving as a protective layer may not be provided.

FIG. 2 is a Joule thermoplastic inflatable structure 50 according to a second embodiment of the present invention. Here, 51 is an airtight layer made of, for example, a film, 52 is a hardened layer made of, for example, carbon fiber woven fabric impregnated with a thermoplastic resin, 53 is a heat insulating material (protective layer), 54 is an inflation device, and 55 and 56. Is an electrode provided at both ends of the hardened layer 52, 57 is an energizing cable for passing an electric current through the electrodes 55 and 56, and 58 is a power supply device for passing an electric current through the hardened layer 52. The airtight layer 51 is formed in a closed bag-like structure, a hardened layer 52 is laminated on the outer surface of the airtight layer 51, and a heat insulating material 53 serving as a protective layer is provided on the outer surface of the hardened layer 52. It is provided by stacking. A power supply device 58 is connected to the electrodes 55 and 56 provided at both ends of the hardened layer 52 by an energizing cable 57. An inflation device 54 is connected to the sealed bag-shaped structure formed of the airtight layer 51, and gas is introduced from the inflation device 54 into the sealed bag-shaped structure formed of the airtight layer 51. That is, the inflatable structure 50 is
A gas is introduced from the inflation device 54 into the sealed bag-shaped structure made of the airtight layer 51 to inflate it into a predetermined shape such as a tube. Then the power supply 5
A current is applied to the hardened layer 52 from 8 through the energizing cable 57 and the electrodes 55 and 56. Since the hardened layer 52 is made of a carbon fiber woven fabric, Joule heat is generated by the electric resistance of the carbon fiber when the carbon fiber is energized, and the Joule heat melts the thermoplastic resin. After that, when the energization is stopped and the temperature drops, the thermoplastic resin is cooled and hardened, and the inflatable structure 50 is hardened in the expanded and expanded shape to become the hardening type inflatable structure. Note that the heat insulating material 53 serving as a protective layer may not be provided.

FIG. 3 shows an electromagnetic wave hardening type inflatable structure 60 according to a third embodiment of the present invention. Here, 61 is an airtight layer made of, for example, a film, 62 is a hardened layer made of, for example, a carbon fiber woven fabric or a chemical fiber woven fabric impregnated with a thermosetting resin or a thermoplastic resin, and 63 is a heat insulating material (protective layer). , 64 is an inflation device, 65
Is an electromagnetic wave generator that generates an electromagnetic wave. The airtight layer 61 is formed in a closed bag-like structure, a hardened layer 62 is laminated on the outer surface of the airtight layer 61, and a heat insulating material 63 serving as a protective layer is provided on the outer surface of the hardened layer 62. It is provided by stacking. An electromagnetic wave generator 65 is provided outside the inflatable structure 60 at a position where the hardened layer 62 can be irradiated with electromagnetic waves.
Are placed. An inflation device 64 is connected to the sealed bag-shaped structure formed of the airtight layer 61, and gas is introduced from the inflation device 64 into the sealed bag-shaped structure formed of the airtight layer 61.
That is, the inflatable structure 60 first introduces gas from the inflation device 64 into the sealed bag-shaped structure made of the airtight layer 61 and inflates the gas into a predetermined shape such as a tube. Then, the electromagnetic wave generator 65
Then, the hardened layer 62 is irradiated with electromagnetic waves. In the hardened layer 62 irradiated with electromagnetic waves, carbon fibers having conductivity in the carbon fiber woven fabric generate heat by induction heating, and the impregnated thermosetting resin or thermoplastic resin, which is a dielectric, generates heat by dielectric heating. To do. Since the chemical fiber and the thermosetting resin or the thermoplastic resin are dielectrics in the chemical fiber fabric, heat is generated by dielectric heating. In any case, the hardened layer 62 is heated by irradiating the electromagnetic wave. In the case of a thermosetting resin, it is cured by heating. In the case of a thermoplastic resin, the thermoplastic resin is melted by heating, and thereafter, when irradiation of electromagnetic waves is stopped and the temperature is lowered, the thermoplastic resin is cooled and hardened. As a result, the hardened layer 62 is hardened, and the inflatable structure 60 is hardened in the expanded and expanded shape to form a hardened inflatable structure. Note that the heat insulating material 63 that serves as a protective layer may not be provided.

FIG. 4 shows an electromagnetic wave hardening type inflatable structure 70 according to a fourth embodiment of the present invention. Here, 71 is an airtight layer made of, for example, a film, 72 is a hardened layer made of, for example, a carbon fiber woven fabric or a chemical fiber woven fabric impregnated with a thermosetting resin or a thermoplastic resin, and 73 is a heat insulating material (protective layer). , 74 is an inflation device, 75
Is an electromagnetic wave generator installed inside the inflatable structure 70 for generating electromagnetic waves. The airtight layer 71 is formed in a sealed bag-like structure, and a hardened layer 72 is laminated on the outer surface of the airtight layer 71.
A heat insulating material 73 serving as a protective layer is laminated and provided on the outer surface of the. Inside the inflatable structure 70, an electromagnetic wave generator 75 is arranged at a position where the hardened layer 72 can be irradiated with electromagnetic waves. An inflation device 74 is connected to the closed bag-shaped structure including the airtight layer 71 so that gas can be introduced from the inflation device 74 into the closed bag-shaped structure including the airtight layer 71. That is, the inflatable structure 70 first introduces gas from the inflation device 74 into the sealed bag-shaped structure made of the airtight layer 71 to inflate it into a predetermined shape such as a tube. Then, the inflatable structure 70
An electromagnetic wave is applied to the hardened layer 72 from the electromagnetic wave generator 75 inside. In the hardened layer 72 irradiated with electromagnetic waves, carbon fibers having conductivity in the carbon fiber woven fabric generate heat by induction heating, and the impregnated thermosetting resin or thermoplastic resin that is a dielectric also generates heat by dielectric heating. To do. Since the chemical fiber and the thermosetting resin or the thermoplastic resin are dielectrics in the chemical fiber fabric, heat is generated by dielectric heating. In any case, the hardened layer 72 is heated by irradiating the electromagnetic wave. In the case of a thermosetting resin, it is cured by heating. In the case of a thermoplastic resin, the thermoplastic resin is melted by heating, and thereafter, when irradiation of electromagnetic waves is stopped and the temperature is lowered, the thermoplastic resin is cooled and hardened. As a result, the cured layer 7
2 is hardened, and the inflatable structure 70 is hardened in the expanded and expanded shape to become a hardening type inflatable structure. The heat insulating material 73 that serves as a protective layer may not be provided.

FIG. 5 shows a curable inflatable structure 80 having a substance that is gasified by heating according to a fifth embodiment of the present invention. Here, 81 is an airtight layer made of, for example, a film, 82 is a hardened layer made of carbon fiber woven fabric or chemical fiber woven fabric impregnated with thermosetting resin or thermoplastic resin, and 83 is a heat insulating material (protective layer). Reference numerals 84 and 84 are substances that are gasified by heating, and can be mounted as shown in the case of a solid or powder, but can be mounted in the inflatable structure 80 by enclosing them in a microcapsule when they are liquid. Reference numeral 85 is an electromagnetic wave generator installed inside the inflatable structure 80 to generate an electromagnetic wave. The airtight layer 81 is formed in a closed bag-like structure, and a hardened layer 82 is laminated on the outer surface of the airtight layer 81.
A heat insulating material 83 serving as a protective layer is laminated on the outer surface of the hardened layer 82. On the inner surface of the airtight layer 81 inside the inflatable structure 80, there is a substance 84 which is gasified by heating.
Are provided so as to be stacked. Inside the inflatable structure 80, an electromagnetic wave generator 85 is arranged at a position where the hardened layer 82 can be irradiated with an electromagnetic wave. A substance 84, which is gasified by heating, is installed in the sealed bag-shaped structure including the airtight layer 81. By irradiating the substance 84 with an electromagnetic wave from the electromagnetic wave generator 85, the substance 84 is heated to generate a gas, so that the hermetically sealed bag-like structure made of the airtight layer 81 is filled with the gas and inflated, for example. It has a predetermined shape such as a tube. Then, the hardened layer 82 is irradiated with electromagnetic waves from the electromagnetic wave generator 85 inside the inflatable structure 80. In the cured layer 82 irradiated with electromagnetic waves, conductive carbon fibers in the carbon fiber woven fabric generate heat by induction heating, and the impregnated thermosetting resin or thermoplastic resin, which is a dielectric, generates heat by dielectric heating. To do. Since the chemical fiber and the thermosetting resin or the thermoplastic resin are dielectrics in the chemical fiber fabric, heat is generated by dielectric heating. In any case, the hardened layer 82 is heated by irradiating the electromagnetic wave. In the case of a thermosetting resin, it is cured by heating. In the case of a thermoplastic resin, the thermoplastic resin is melted by heating, and thereafter, when irradiation of electromagnetic waves is stopped and the temperature is lowered, the thermoplastic resin is cooled and hardened.
As a result, the hardened layer 82 is hardened, and the inflatable structure 80 is hardened in the expanded and expanded shape to become a hardening type inflatable structure. Note that the heat insulating material 83 serving as a protective layer may not be provided. Further, as the hardened layer, a hardened layer obtained by impregnating a thermosetting resin or a thermoplastic resin in a carbon fiber woven fabric that generates heat by passing an electric current may be used.

FIG. 6 shows a foam hardening type inflatable structure 90 according to a sixth embodiment of the present invention. here,
Reference numeral 91 is an inner airtight layer formed of, for example, a film or the like formed in a closed bag-like structure, 92 is an outer airtight layer of, for example, a film, and 93 is a substance that is gasified by heating, and is solid or powdery. In the case of, it can be mounted on the inner surface of the airtight layer 91 as shown in the figure, but in the case of a liquid, it is mounted in the inflatable structure 90 by enclosing it in a microcapsule. 94 is a foaming resin, 95 is a heat insulating material (protective layer), 9
Reference numeral 6 is an electromagnetic wave generator installed inside the inflatable structure 90 to generate an electromagnetic wave. A substance 93, which is gasified by heating, is enclosed inside the airtight layer 91,
The foamable resin 9 is provided in the area sandwiched between the two airtight layers 91 and 92.
In the inflatable structure 90 in which 4 is put, first, the electromagnetic wave is generated by the electromagnetic wave generator 96, and the nearby substance 93 which is gasified by heating is first irradiated with the electromagnetic wave to generate heat by dielectric heating to raise the internal pressure by gasification to increase the inflatable structure. 90 is formed into a predetermined shape such as a tube. Next, the foamable resin 94 is irradiated with electromagnetic waves, so that the foamable resin 94 is heated by dielectric heating, and as a result, a foaming curing reaction occurs. This hardens the already expanded outer wall of the inflatable structure 90,
A hollow pipe-shaped curable inflatable structure is obtained. The same operation can be performed by providing an outer non-hermetic layer instead of the outer hermetic layer 92.

FIG. 7 is a conceptual diagram of a self-propagating space inflatable structure using a combination of the curable inflatable structures according to the embodiment of the present invention. The self-propagating space inflatable structure is a structure in which sunlight is collected and converted into energy, and the energy is used for hardening the next space inflatable structure. By doing so, when curing a large number of inflatable structures, only the energy necessary for curing the first inflatable structure needs to be carried from the earth by a battery or the like. Self-propagating space inflatable structure 100, 110, 1 in order from the top
20. Curing is performed in this order. In practice, this process can cure a number of space inflatable structures. The inflatable structure 100 includes an inflatable ring 101 attached to and supported by one end of a plurality of inflatable struts 102.
The other ends of the plurality of inflatable struts 102 are gathered in one place, and the power supply unit 103 is installed. Power supply 1
A solar cell 104 is attached to the surface of 03. An electromagnetic wave generator 105 is installed on the back side of the power supply unit 103. An electromagnetic wave generator 106 is also installed inside the inflatable ring 101, and the cable 1 extending from the power supply unit 103 to the inflatable strut 102 is provided.
Electric power is supplied to the electromagnetic wave generation device 106 via 07.
The light emitted from the sun 108 is reflected by the reflecting mirror 109,
It is condensed on the solar cell 104 and converted into electricity. An electromagnetic wave is emitted from an electromagnetic wave generator 105 that converts the electricity into an electromagnetic wave. The inflatable ring 111 that constitutes the inflatable structure 110 is irradiated with the electromagnetic wave from the electromagnetic wave generator 105 and hardens. Like the inflatable structure 100, the inflatable structure 110 also includes the reflecting mirror 1.
The solar light is reflected at 12 and condensed on the solar cell 113.
After being converted into electricity by the solar cell 113, the electromagnetic wave is emitted from the electromagnetic wave generator 114. The inflatable ring 121 that constitutes the inflatable structure 120 is irradiated with the electromagnetic wave from the electromagnetic wave generator 114 and hardens. Similarly, the inflatable structure can be cured by self-proliferation.

The following effects are exhibited in the curable inflatable structure according to the embodiment of the present invention, and the characteristics are exhibited in many applications including space development, thereby contributing to industrial development. be able to.

Since the Joule heat generated when the carbon fibers constituting the hardened layer are energized is used for hardening the inflatable structure, it is not necessary to attach a heater for heat generation to the hardened layer, and a lightweight and simple structure can be obtained. An inflatable structure that can be easily folded is obtained.

In addition to being directly energized, the conductive carbon fibers generate heat by induction heating when irradiated with electromagnetic waves, and the impregnated resin, which is a dielectric material, generates heat by dielectric heating to form a hardened layer. The hardened layer can be heated without attaching a heater. When a chemical fiber woven fabric is used instead of the carbon fiber woven fabric, both the fiber and the resin are dielectrics, so that heat is generated by dielectric heating and the hardened layer can be similarly heated.

By heating by irradiation of electromagnetic waves, uniform heat generation can be generated over the entire surface of the hardened layer. Further, for this reason, the deformation of the inflatable structure at the time of hardening can be reduced.

Since the substance which is gasified by heating and which is enclosed inside the airtight layer by irradiation of electromagnetic waves is heated to increase its volume, an increase in the internal pressure of the inflatable structure due to this is caused by the expansion of the inflatable structure. Can be used for part.

Since the energy used for heating is efficiently converted into heat, the inflatable structure can be efficiently cured.

Since the energy used for heating is efficiently converted into heat, the inflatable structure can be cured with a small device.

[0035]

As described above, according to the present invention, when the inflatable structure is cured, a heat source for heating is directly attached to the cured layer in order to facilitate folding of the cured layer before curing. By directly heating the hardened layer without using gas or the like, a hardened layer that is lightweight, simple, and flexible in the folded state before hardening can be realized.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a Joule thermosetting type inflatable structure according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing a Joule heat melting cooling hardening type inflatable structure according to an embodiment of the present invention.

FIG. 3 is a partially cutaway perspective view showing an electromagnetic wave curing type inflatable structure according to an embodiment of the present invention.

FIG. 4 is a partially cutaway perspective view showing an electromagnetic wave curing type inflatable structure according to an embodiment of the present invention.

FIG. 5 is a partially cutaway perspective view showing a curable inflatable structure having a substance that is gasified by heating according to an embodiment of the present invention.

FIG. 6 is a partially cutaway perspective view showing a foam-curable inflatable structure according to an embodiment of the present invention.

FIG. 7 is a perspective view showing a self-propagating space inflatable structure according to an embodiment of the present invention.

FIG. 8 is a perspective view showing a conventional inflatable structure.

FIG. 9 is a perspective view showing a conventional heater heating type inflatable structure.

FIG. 10 is a perspective view showing a conventional heated gas introduction type inflatable structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Inflatable structure 11 Inflatable ring 12 Planar antenna 13 Membrane surface tension cable 20 Heater heating type inflatable structure 21 Airtight layer 22 Hardening layer 23 Sheet heater 24 Inflator 30 Heating gas introduction type inflatable structure 31 Airtight layer 32 Hardening layer 33 Insulation Material 34 Inflation Device 35 Heater 36 Exhaust Pipe 37 Exhaust Valve 40 Joule Thermosetting Inflatable Structure 41 Airtight Layer 42 Curing Layer 43 Heat Insulation Material 44 Inflation Device 45 Electrode 46 Electrode 47 Energizing Cable 48 Power Supply Device 50 Joule Heat Melt Cooling Curable Inflatable Structure 51 Airtight Layer 52 Hardened Layer 53 Heat Insulation Material 54 Inflation Device 55 Electrode 56 Electrode 57 Power Cable 58 Power Supply Device 60 Electromagnetic Wave Curable Inflatable Structure 61 Airtight Layer 62 Hardened layer 63 Heat insulating material 64 Inflation device 65 Electromagnetic wave generator 70 Electromagnetic wave curable type inflatable structure 71 Airtight layer 72 Hardened layer 73 Heat insulating material 74 Inflation device 75 Electromagnetic wave generator 80 Hardened type inflatable structure 81 having a substance gasified by heating 81 Airtight layer 82 Hardened Layer 83 Heat Insulation Material 84 Gasified by Heating 85 Electromagnetic Wave Generator 90 Electromagnetic Wave Generation Device 90 Foam Hardening Inflatable Structure 91 Inner Airtight Layer 92 Outer Airtight Layer 93 Gasified Material by Heating 94 Foaming Resin 95 Insulation Material 96 Electromagnetic Wave Generation Device 100 Self-propagating space inflatable structure 101 Inflatable ring 102 Inflatable strut 103 Power supply unit 104 Solar cell 105 Electromagnetic wave generator 106 Electromagnetic wave generator 107 Cable 108 Sun 109 Reflector 1 0 self-propagating space inflatable structure 111 Inflatable ring 112 reflector 113 solar cell 114 electromagnetic wave generator 120 self-propagating space inflatable structure 121 Inflatable ring

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yumi Senkitaya             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Inside Telegraph and Telephone Corporation (72) Inventor Akito Watanabe             14-10 Shimoyasuda, Maruoka-cho, Sakai-gun, Fukui Prefecture             Within SE ADTEC Co., Ltd. F term (reference) 2E141 EE03 EE04 HH01

Claims (8)

[Claims] 1. A thermosetting resin is formed on a gas-tight layer formed by introducing gas into a sealed bag-shaped structure having a predetermined shape, and a carbon fiber woven fabric laminated on the gas-tight layer to generate heat when an electric current flows. A curable inflatable device comprising: an impregnated hardened layer; and an electrode for passing an electric current through the hardened layer. 2. An airtight layer formed into a sealed bag-like structure having a predetermined shape by introducing a gas, and a carbon fiber woven fabric laminated on the airtight layer and generating an electric current when a thermoplastic resin is added thereto. A curable inflatable device comprising: an impregnated hardened layer; and an electrode for passing an electric current through the hardened layer. 3. An airtight layer formed in a sealed bag-like structure having a predetermined shape by introducing gas, and a thermosetting layer that is laminated on the airtight layer and generates heat by irradiating an electromagnetic wave from outside the inflatable structure. A curable inflatable device, comprising: a hardening layer made of a carbon fiber woven fabric or a chemical fiber woven fabric impregnated with a mold resin or a thermoplastic resin. 4. An airtight layer formed into a bag-shaped structure having a predetermined shape sealed by introducing gas, and a thermosetting layer that is laminated on the airtight layer and generates heat by irradiating electromagnetic waves from the inside of the inflatable structure. A curable inflatable device, comprising: a hardening layer made of a carbon fiber woven fabric or a chemical fiber woven fabric impregnated with a mold resin or a thermoplastic resin. 5. An airtight layer, which is provided in the interior thereof with a substance that is gasified by heating and is formed into a bag-like structure having a predetermined shape by gasification of the substance by heating, and is laminated on the airtight layer, A hardening layer made of carbon fiber woven fabric or chemical fiber woven fabric impregnated with a thermosetting resin or thermoplastic resin that generates heat when irradiated with electromagnetic waves, or a thermosetting resin or heat applied to a carbon fiber woven fabric that generates heat when an electric current flows. A hardening type inflatable device, comprising: a hardening layer impregnated with a plastic type resin. 6. The curable inflatable device according to claim 1, further comprising a protective layer provided outside the hardened layer. 7. An airtight layer formed by introducing a gas into a sealed bag-like structure having a predetermined shape, and a foamable resin layer laminated on the airtight layer and capable of foaming and curing by irradiation with an electromagnetic wave. And a curable inflatable device. 8. The curable inflatable device according to claim 7, wherein a protective layer is provided outside the foamable resin layer.