JP2020015470A - Captive balloon - Google Patents

Abstract

To provide a captive balloon which can stably support a balloon during takeoff and landing with a landing base.SOLUTION: A captive balloon has a balloon including a resin-made bag body forming a flat shape when its inside is filled with gas with a first inner pressure, a plurality of mooring ropes whose one ends are connected to the outer surface of the balloon, and a landing base on which the balloon is landed, in which the landing base includes a receiving part that is a resin-made bag body forming a torus shape when its inside is filled with gas with a second inner pressure lower than the first inner pressure, a contact part that is arranged on the outer surface of the receiving part and with which the balloon is brought into contact when the balloon is landed on the landing base, and a leg part that has one end connected to the receiving part and is a plurality of resin-made bag bodies forming a pillar shape when its inside is filled with gas.SELECTED DRAWING: Figure 1

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mooring balloon that supports a balloon by a landing platform when the balloon connected to a mooring line takes off and on.

  When the operation of the base station is stopped due to a disaster or the like, a communication failure occurs in which the communication of a mobile terminal such as a mobile phone cannot be performed in an area covered by the stopped base station. When a communication failure occurs, it is required to quickly recover the base station that has stopped operating and eliminate the communication failure. However, it may be difficult to quickly restore the function of the base station, for example, when the base station is collapsed.

  On the other hand, there is known a balloon which can be moored at a predetermined height in the sky by connecting a mooring line. Such balloons are used for wind speed surveys in the sky when constructing large structures such as wind power generators, for surveying the vertical distribution of wind speed and temperature, and for photographing images to confirm the damage situation in the event of a disaster. It is known to be used. By attaching a device having a base station function to such a balloon and mooring it in the sky, it is possible to install a temporary base station that covers an area larger than a temporary base station installed on the ground.

  When mooring a balloon using mooring lines, it is important to maintain an appropriate posture even in strong winds. For example, Patent Literature 1 includes a cable length adjustment unit that adjusts the length of any of the mooring lines according to the wind speed of the airflow, and the cable length adjustment unit adjusts the length of the mooring line according to the wind speed of the airflow. A balloon that can maintain a constant inclination by adjusting the balloon is described.

JP-A-2006-002973

  Balloons moored by mooring lines take off and land near the ground. During takeoff and landing of the balloon, various operations on the balloon are performed by the operator, such as maintaining the attitude of the balloon, injecting or discharging gas into or from the balloon, and attaching devices to the balloon. If the attitude of the balloon is unstable at the time of takeoff and landing, the efficiency of the work performed by the worker decreases.

  Therefore, an object of the present invention is to provide a moored balloon that can stably support a balloon during takeoff and landing by a landing pad.

  The first tethered balloon according to the present invention includes a balloon including a resin bag that has a flat shape when the inside is filled with a gas at a first internal pressure, and a plurality of balloons each having one end connected to an outer surface of the balloon. And a landing platform on which the balloon lands. The landing platform is a resin bag that forms a torus shape when the inside is filled with gas at a second internal pressure lower than the first internal pressure. A receiving portion, a contact portion disposed on the outer surface of the receiving portion and contacting the balloon when the balloon lands on the landing platform, and a plurality of pillars each having one end connected to the receiving portion and filled with a gas therein to form a column. And a leg, which is a resin bag.

  The second tethered balloon according to the present invention includes a resin bag body having a flat shape when the inside is filled with a gas, and a balloon having a flat cross section having a diameter of D1 which is a diameter of a horizontal cross section is D1. A plurality of mooring lines each having one end connected to the outer surface of the balloon, and a landing platform on which the balloon lands, wherein the landing platform is made of a resin that forms a torus when the inside is filled with gas. It is a bag, and a receiving portion in which the inner diameter D3 of the great circle in the torus shape satisfies the relationship of D1 × 0.68 ≦ D3 ≦ D1, one end is connected to the receiving portion, and the inside is filled with gas to form a column shape. And a plurality of resin bag bodies.

  A third moored balloon landing platform according to the present invention includes a balloon including a resin bag body that has a flat shape when filled with a gas, and a plurality of moorings each having one end connected to an outer surface of the balloon. A cable, a landing table on which the balloon lands, and a landing table, a receiving section which is a resin-made bag-shaped body having a torus shape when the receiving section air chamber is filled with gas, and one end of the receiving section. Connected to each other, the plurality of resin bags each having a columnar shape when the inside is filled with gas, and the plurality of legs each have a first leg air chamber filled with gas. A plurality of second legs each having a first leg and a second leg air chamber filled with gas, wherein the second leg air chamber is separated from the receiving air chamber and the first leg air chamber. And second legs connected to the receiving portion at positions adjacent to each other in the receiving portion. To.

  A fourth mooring balloon landing pad according to the present invention includes a balloon including a resin bag body having a flat shape when the inside is filled with a gas, and a plurality of moorings each having one end connected to an outer surface of the balloon. It has a rope and a landing platform on which the balloon lands, and the landing platform is a resin bag that forms a torus shape when the inside is filled with gas, and the inner diameter of the torus-shaped great circle is D3. A plurality of resin bags each having a receiving portion and one end connected to the receiving portion and filled with a gas therein and having a columnar shape, wherein the balloon is disposed on the outer surface of the receiving portion from the other end other than the one end; It is characterized in that a leg portion is provided which has a height H to a contact portion with which a balloon comes into contact when landing on a platform and satisfies H <D3 / 2.

  A fifth mooring balloon landing platform according to the present invention includes a balloon including a resin bag that has a flat shape when filled with gas, and a plurality of moorings each having one end connected to an outer surface of the balloon. A cord, and a landing platform on which the balloon lands, the landing platform is a resin bag that forms a torus shape when the inside is filled with gas, and the diameter d of a small circle in the torus shape is: a receiving portion that satisfies the relationship of d <2 / π (π = pi), and a leg portion, which is connected to the receiving portion at one end and is filled with a gas and is a plurality of resin bag bodies having a columnar shape. , Is provided.

  According to the present invention, it is possible to provide a moored balloon capable of stably supporting the balloon at the time of takeoff and landing by the landing pad.

It is a schematic diagram which shows the outline of the mooring balloon 1. FIG. 2 is a cross-sectional view taken along line XX ′ in FIG. 1 when a landing pad supports a balloon by contact. It is a schematic diagram explaining the contact surface of a receiving part and a balloon in the landing platform of 1st Embodiment. FIG. 2 is a cross-sectional view taken along the line XX ′ in FIG. 1 when a balloon receiving a cross wind is supported on a landing platform in the moored balloon of the first embodiment. It is XX 'sectional drawing in FIG. 1 when a balloon is filled with gas inside the landing platform in the mooring balloon of the second embodiment. (A) is a figure which shows the 1st use mode of the landing stand in the mooring balloon of 3rd Embodiment, (b) is a figure which shows the 2nd use mode of the landing board in the mooring balloon of 3rd Embodiment. It is a figure which shows the positional relationship of the landing stand and a balloon in the mooring balloon of 4th Embodiment. It is a figure showing the physical relationship of the landing stand and a balloon in a mooring balloon of a 5th embodiment.

  Hereinafter, the tethered balloon will be described in detail with reference to the drawings. However, it should be understood that the invention is not limited to the drawings or the embodiments described below.

  The tethered balloon according to the embodiment described in the present specification, a balloon having a substantially circular shape having a diameter of 3 m or more and 9 m or less when filled with gas and a landing table that supports the balloon when taking off and landing the balloon. Prepare. The balloon is moored from the landing platform by a mooring line. The landing platform has a receiving portion that is held in contact with the balloon, and a plurality of legs each having one end connected to the receiving portion and the other end disposed on the installation surface. The balloon to which the mooring line is connected is fixed on the mooring line by a four-sided roller arranged on the installation surface near the center of the receiving portion. The landing platform limits the movement range of the balloon connected to the mooring line, and stabilizes the attitude of the balloon during takeoff and landing.

  FIG. 1 is a schematic diagram showing an outline of a tethered balloon 1.

  The mooring balloon 1 includes a balloon 10, a mooring line 11, a landing pad 13, a four-sided roller 14, and a winding device 20.

  The balloon 10 includes a balloon main body 101, a dome 102 for a payload, and a scoop 103. The balloon main body 101 has an outer bag made of a rigid, lightweight and air-impermeable material such as synthetic fiber, and a helium storage bag that is contained in the outer bag and is filled with helium gas. The balloon 10 has a flat spherical shape when helium gas is filled in a helium storage bag, which is a resin bag. The payload dome 102 is a cylindrical member with a bottom, and is arranged such that the bottom is in contact with the balloon main body 101. Equipment such as a relay station is arranged in the concave portion of the payload dome 102. The relay station has a not-shown relay antenna and an antenna for mobile stations, and forms a communication network with a portable terminal located in a communicable area. The scoop 103 is also referred to as a posture stabilizing film, and is a film material having a flexible surface formed of polyester woven so that air is transmitted from one surface to the other surface. Joined to outer bag.

  The mooring cable 11 includes a main mooring cable 110, a first sub-mooring cable 111, a second sub-mooring cable 112, a third sub-mooring cable 113, and a knot 114. In one example, the total length of the mooring line 11 is about 100 m. One end of the main mooring line 110 is connected to the first sub-mooring line 111, the second sub-mooring line 112, and the third sub-mooring line 113 via the knot 114. The other ends of the first sub-mooring line 111, the second sub-mooring line 112, and the third sub-mooring line 113 are connected to the outer surface of the balloon main body 101 of the balloon 10.

  The landing table 13 has a receiving portion 131 and a leg 132. The receiving portion 131 is a torus-shaped resin bag that supports the balloon 10 when the balloon 10 lands. The leg 132 is a resin bag having a columnar shape, one end of which is connected to the receiving portion and the other end of which is arranged on the installation surface.

  The four-sided roller 14 has four rollers arranged so as to form a substantially square when viewed from above. The inside surrounded by the four rollers forms a cable passage opening. The four-sided roller 14 is used when the mooring line 11 is unwound from the winding device 20 as the balloon 10 rises, and when the mooring line 11 is wound around the winding device 20 as the balloon 10 descends. The mooring cable 11 passing through the cable passage is slidably guided.

  The first roller 15 and the second roller 16 have rotatable columnar guides. When the mooring line 11 is unwound from the winding device 20 as the balloon 10 rises, and when the mooring line 11 is wound around the winding device 20 as the balloon 10 descends, the guide portion is connected to the mooring line. It rotates with the movement of 11. The first roller 15 and the second roller 16 are disposed between the four-sided roller 14 and the winding device 20, and guide the mooring line 11 in a desired direction.

  The winding device 20 has a motor and a drum. A mooring line 11 is fixed to the drum. The motor rotates in a first direction or a second direction opposite to the first direction. The drum unwinds the mooring line 11 when the motor rotates in the first direction, and winds up the mooring line 11 when the motor rotates in the second direction.

  FIG. 2 is a cross-sectional view taken along the line XX ′ in FIG. 1 when the landing platform supports the balloon by contact.

  The balloon 10 is supported by the receiving portion 131 of the landing platform 13 by contact. The balloon 10 has a flat spherical shape when filled with gas. D1 is the balloon diameter which is the diameter of the balloon 10 when viewed from above. D4 is the height of the balloon. In the embodiment described in the present specification, the balloon diameter D1 is 3 m or more and 9 m or less. In the embodiment described in the present specification, the height D4 of the balloon 10 is 0.7 times the balloon diameter D1, and the flatness of the balloon 10 is 0.7.

  The receiving portion 131 of the landing platform 13 contacts the balloon 10 at the position 131a. The diameter of the receiving portion 131 of the landing platform 13 in the XX ′ cross-sectional view is d, which corresponds to the diameter of a small circle in the torus shape of the receiving portion 131. The distance between the left end of the left circular shape of the receiving portion 131 and the right end of the right circular shape is D2, and corresponds to the outer diameter of the great circle in the torus shape of the receiving portion 131. The distance between the right end of the left circular shape of the receiving portion 131 and the left end of the right circular shape is D3, and corresponds to the inner diameter of the great circle in the torus shape of the receiving portion 131.

  The leg 132 is connected to the receiving portion 131 at one end 132a, and is disposed on the installation surface at the other end 132b. The height from the other end 132b of the leg 132 to the position 131a of the receiving portion 131 is H.

  The winding device 20 winds the mooring line 11 with the force N. The force N is 300 kgf to 1000 kgf. Since the direction of the force N is changed by the four-sided roller 14, the mooring line 11 pulls the balloon 10 downward with the force N. Therefore, the balloon 10 comes into contact with the receiving portion 131 of the landing platform 13 with the force N.

  FIG. 3 is a schematic diagram illustrating a contact surface with a balloon in a receiving portion of the landing platform according to the first embodiment. In the description of each embodiment, “−1” in the case of the first embodiment and “−2” in the case of the second embodiment are added to the end of the reference numerals used in the description of each part in FIGS. , "-3" in the third embodiment and "-4" in the fourth embodiment.

  In the mooring balloon 1-1 of the first embodiment, the landing platform 13-1 stably supports the balloon 10-1 by contact.

  In the mooring balloon 1-1 of the first embodiment, the receiving portion 131-1 of the landing platform 13-1 supports the balloon 10-1 by contact. FIG. 3 is a schematic diagram of a surface of the receiving portion 131-1 that is in contact with the balloon 10-1 as viewed from above (the side of the balloon 10-1). FIG. 3 shows the upper surface of the receiving portion 131-1 through which the balloon 10-1 indicated by a broken line is transmitted. The receiving portion 131-1 contacts the balloon main body 101-1 at the contact portion 131-1b. The contact portion 131-1b is arranged on the outer surface of the receiving portion 131-1 and contacts the balloon 10-1 when the balloon 10-1 lands on the landing platform 13-1. In the present embodiment, the contact portion 131-1b is a concentric circle having a width W. The shape of the contact portion 131-1b is not limited to a concentric circle, and may be, for example, a plurality of regions arranged on the circumference of the concentric circle.

  Generally, the static friction force between objects does not depend on the contact area. However, when the object is an elastic body, the elastic body deforms and comes into close contact with the other object, so that a static friction force corresponding to the contact area is generated. In this embodiment, since both the balloon 10-1 and the receiving portion 131-1 are bags filled with gas and are elastic members, a larger static friction force is generated as the area of the contact portion 131-1b increases. . When a large static friction force is generated between the balloon 10-1 and the receiving portion 131-1, the receiving portion 131-1 can stably support the balloon 10-1.

  The width W of the contact portion 131-1b changes according to the internal pressure of the balloon 10-1 and the receiving portion 131-1 and the force N for bringing the balloon 10-1 into contact with the receiving portion 131-1. That is, when the internal pressure of the balloon 10-1 or the receiving portion 131-1 is reduced or the force N is increased, the width W increases within a predetermined range.

  When the internal pressure of the balloon 10-1 is the first internal pressure, and the internal pressure of the receiving portion 131-1 is the second internal pressure lower than the first internal pressure, when the balloon 10-1 comes into contact with the receiving portion 131-1, The part 131-1 is deformed along the outer shape of the balloon 10-1. Therefore, the width W can be increased by making the internal pressure of the receiving portion 131-1 smaller than the internal pressure of the balloon 10-1.

  In order to operate the balloon 10-1, the balloon 10-1 is filled with a gas such as helium at a first internal pressure of about atmospheric pressure + about 0.3 to 0.6 kPa. If the first internal pressure is reduced, sufficient buoyancy will not be generated, which hinders the operation of the balloon 10-1. Therefore, it is not preferable to reduce the first internal pressure to less than the atmospheric pressure + 0.3 kPa in order to increase the width W.

  On the other hand, the receiving portion 131-1 is filled with a gas such as air at the second internal pressure in order to stabilize its shape. When the second internal pressure is reduced to less than 0.3 kPa, the stability of the shape of the receiving portion 131-1 is reduced to some extent, but does not affect the operation of the balloon 10-1.

  Therefore, by setting the first internal pressure to 0.3 kPa or more and setting the second internal pressure to less than 0.3 kPa, the width W of the contact portion 131-1b is set to an appropriate size without hindering the operation of the balloon 10-1. be able to.

  At this time, the leg 132-1 is filled at about atmospheric pressure + 10 kPa.

  The force N can be increased by increasing the winding force of the winding device 20-1. However, in order to increase the winding force of the winding device 20-1, replacement with a larger winding device 20-1 or the like is necessary, which is not easy. The force N can be increased by attaching a weight to the balloon 10-1 supported by the receiving portion 131-1. However, attaching the weight takes time. Further, the force N cannot be increased between the time when the balloon 10-1 is supported by the receiving portion 131-1 and the time when the weight is attached.

  In the present embodiment, the material of the outer surface of the balloon 10-1 and the material of the contact portion 131-1b are both nylon. As described above, the material of the contact portion 131-1b may be the same as the material of the outer surface of the balloon 10-1.

  Further, the material of the contact portion 131-1b may be a material having a larger coefficient of static friction with the material of the outer surface of the balloon 10-1 than the material of the surface of the balloon 10-1. For example, when the material of the surface of the balloon 10-1 is nylon, rubber having a coefficient of static friction with nylon larger than that of nylon may be used as the material of the contact portion 131-1b. By using rubber as the material of the contact portion 131-1b, a larger static friction force is generated between the balloon 10-1 and the receiving portion 131-1. Therefore, the landing platform 13-1 makes the balloon 10-1 more stable. Can be supported.

  The landing platform 13-1 is preferably formed with an appropriate size in order to stably support the balloon 10-1. Specifically, when the outer diameter D2 of the torus shape of the receiving portion 131-1 is too small with respect to the balloon diameter D1, the landing platform 13-1 cannot stably support the balloon 10-1. If the outer diameter D2 of the torus shape of the receiving portion 131-1 is larger than the balloon diameter D1, the landing platform 13-1 cannot support the balloon 10-1, which is not preferable from the viewpoint of portability of the apparatus.

  FIG. 4 is a cross-sectional view taken along the line XX ′ in FIG. 1 when the balloon that receives a cross wind in the moored balloon of the first embodiment is supported by the landing platform.

  The balloon 10-1 is pulled downward by the force N in the vicinity of the center in the horizontal section by the winding device 20-1, and is supported by the landing platform 13-1. On the other hand, the balloon 10-1 receives a force FW due to the crosswind.

  In order to prevent rollover caused by the crosswind of the balloon 10-1 with the contact point with the receiving portion 131-1 on the leeward side of the crosswind as a fulcrum, the force N applied near the center is reduced by the force FW applied to the windward side of the crosswind. It just needs to be higher.

The wind load FW (kgf) due to the crosswind is obtained by the following equation based on the air density ρ (0.125 kgf · s ² / m ⁴ ), the wind speed V (m / s), the pressure receiving area A (m ² ), and the drag coefficient C _D. Is represented by

FW = 1/2 × ρ × V ＾ 2 × A × C _D

  The pressure receiving area is an area of an ellipse having a major axis of D1 and a minor axis of D4, which is a vertical cross section of the balloon 10-1. Since the flatness of the balloon 10-1 is 0.7, A = π × 0.5 × D1 × 0.35 × D1 = 0.175 × π × D1 ＾ 2 (π = pi).

Drag coefficient C _D of balloon 10-1, since it is ellipsoidal shape, and 0.6.

  The tethered balloon 1-1 is required to be able to cope with a crosswind of about 15 m / s.

  As described above, the force FW is represented by the following equation using the balloon diameter D1.

  FW ≒ 1.48 × π × D1 ＾ 2

  When the force N applied to the position of D2 / 2 from the fulcrum and the force FW applied to the position of (D1 / 2 + D2 / 2) from the fulcrum balance, the following formula is established.

  N × D2 / 2 = FW × (D1 / 2 + D2 / 2)

  When the FW obtained above is substituted into the above equation and rearranged, the force N is expressed by the following equation using D1.

  N ≒ 1.48 × π × D1 ＾ 2 × (D1 + D2) / D2

  In the present embodiment, the balloon diameter D1 is 3 m to 9 m, and the force N is 300 kgf to 1000 kgf. Here, it is considered that when the balloon diameter D1 is 9 m, the rollover of the balloon 10-1 is prevented by the force N of 1000 kgf and the force FW of the crosswind at a wind speed of 15 m / s.

  At this time, the ratio between D1 and D2 may be determined so that N = 377 × (D1 + D2) / D2 ≦ 1000 from the above equation. Rearranging this equation gives D2 ≧ 377/623 × D1 ≒ D1 × 0.6. Therefore, it is preferable that D2 ≧ D1 × 0.6 to prevent the balloon 10-1 from rolling over due to the crosswind.

  That is, in the tethered balloon 1-1 of the present embodiment, it is preferable that the balloon diameter D1 and the outer diameter D2 of the torus shape of the receiving portion 131 satisfy the following relationship.

  D1 × 0.6 <D2 <D1

  FIG. 5 is a cross-sectional view taken along the line XX ′ in FIG. 1 when the balloon is filled with gas inside the landing pad in the moored balloon of the second embodiment.

  In the mooring balloon 1-2 of the second embodiment, the landing platform 13-2 stably supports the balloon 10-2 under gas filling inside the receiving portion 131-2.

  In the second embodiment, the balloon 10-2 is filled with helium in a state where the balloon 10-2 is arranged inside the torus shape of the receiving portion 131-2 of the landing platform 13-2 as shown by a solid line in FIG. When the balloon 10-2 is filled with helium to an internal pressure suitable for operation, the balloon 10-2 has a flat shape with a balloon diameter D1 as shown by a broken line in FIG.

  The balloon 10-2 partially filled with helium indicated by a solid line in FIG. 5 partially floats due to the filled helium, and is in an unstable state. At this time, if there is nothing supporting the balloon 10-2 around the balloon 10-2, when the balloon 10-2 receives a cross wind, the balloon 10-2 swings, and the helium filling operation is started. It becomes difficult.

  The landing platform 13-2 of the mooring balloon 1-2 of the present embodiment has a shape capable of supporting the balloon 10-2 in a helium filling process. Therefore, in the mooring balloon 1-2, the helium is charged into the balloon 10-2 inside the landing platform 13-2, thereby restricting the movement of the balloon 10-2 due to the cross wind, and stably supporting the balloon 10-2. be able to.

  On the other hand, since the inner diameter D2 of the great circle in the torus shape of the receiving portion 131-2 is smaller than the balloon diameter D1-2, it is suitable for operation while being arranged inside the torus shape of the receiving portion 131-2. Helium cannot be filled into the balloon main body 101-2 up to the internal pressure.

  In the balloon 10-2 of this embodiment, when helium is filled in the balloon main body 101-2 by about 70%, excess buoyancy exceeding the weight of the balloon 10-2 is generated, and the balloon 10-2 becomes stable. Therefore, in the landing platform 13-2 of the present embodiment, the receiving portion 131-2 has a shape capable of disposing the balloon 10-2 inside the torus until the helium is filled in the balloon main body 101-2 by 70% or more. have.

  Assuming that the volume of the balloon 10-2 filled with helium to an internal pressure suitable for operation is V1, V1 is represented by the following equation.

  V1 = 4/3 × π × (D1 / 2) ＾ 2 × (D4 / 2)

  The volume of the helium-filled balloon 10-2 placed inside the torus shape of the receiving portion 131-2 is defined as V2. At this time, in the balloon 10-2, the diameter of the cross section parallel to the installation surface becomes D3, which is the inner diameter of the torus shape of the receiving portion 131-2, and the height of the balloon 10-filled with helium to an internal pressure suitable for operation. It is assumed that D4 is the same as the height of 2. At this time, V2 is represented by the following equation.

  V2 = π × (D3 / 2) ＾ 2 × D4

  At this time, the helium filling rate V2 / V1 of the balloon 10-2 is represented by the following equation.

  V2 / V1 = (3 × D3 ＾ 2) / (2 × D1 ＾ 2)

  Therefore, in order to enable the balloon 10-2 to be disposed inside the receiving portion 131-2 when the helium filling rate V2 / V1 is 70% or more, the following relationship is established between the balloon diameter D1 and the inner diameter D3 of the torus shape. Fulfill.

  D3 ≧ D1 × 0.68

  On the other hand, when the inner diameter D3 is equal to or larger than the balloon diameter D1, the receiving portion 131-2 cannot support the balloon 10-2. Therefore, in the tethered balloon 1-2 of the present embodiment, the balloon diameter D1 and the inner diameter D3 satisfy the following relationship.

  D1 × 0.68 ≦ D3 <D1

  In addition, in order to stably support the balloon 10-2 filled with helium in a state where the balloon 10-2 is arranged inside the torus shape of the receiving portion 131-2, the height H of the receiving portion 131-2 is set so that the helium filling rate is reduced. It is preferable that the height is not less than の of the height D4 of the balloon 10-2 at 70%. The height H is arranged on the outer surface of the receiving portion 131-2 from the other end which is not connected to the receiving portion 131-2 of the leg portion 132-2, and the balloon 10-2 lands on the landing platform 13-2. Sometimes the height is up to the contact portion 131-2b where the balloon 10-2 comes into contact. Assuming that the flatness of the balloon 10-2 filled with helium to an internal pressure suitable for operation is 0.7, the height D4 can be expressed as D4 = D1 × 0.7 using the balloon diameter D1. That is, it is preferable that the height H of the receiving portion 131-2 and the balloon diameter D1 satisfy the following relationship.

  H ≧ D1 × 0.35

  FIG. 6A is a diagram illustrating a first use mode of the landing table in the mooring balloon according to the third embodiment, and FIG. 6B is a diagram illustrating a second use mode of the landing table in the mooring balloon according to the third embodiment. FIG.

  In the mooring balloon 1-3 of the third embodiment, the landing platform 13-3 is disposed on the carrier 31 provided in the vehicle 30, and contacts the balloon 10-3 having a flat spherical shape when filled with gas. Supported by The landing platform 13-3 according to the third embodiment has a shape capable of stably supporting a balloon in various installation environments.

  In the landing platform 13-3 of the third embodiment, the receiving section 131-3 includes a first receiving section 131-3-1 and a second receiving section 131-3-2. In the landing platform 13-3, the plurality of legs 132-3 include a plurality of first legs 132-3-1 and a plurality of second legs 132-3-2.

  The plurality of second legs 132-3-2 are connected to the second receiving portion 131-3-2 at positions adjacent to each other in the second receiving portion 131-3-2. FIG. 6A shows the landing platform 13-3 viewed from the right side of the vehicle 30. However, when viewed from the left side of the vehicle 30, the landing platform 13-3 is the same as that of FIG. Appear symmetrically. That is, one of the plurality of second legs 132-3-2 is disposed on the right rear of the vehicle 30 and the other is disposed on the left rear of the vehicle 30. -3-2 are adjacent to each other. Note that a different second leg may be disposed between the right rear second leg 132-3-2 and the left rear second leg 132-3-2 of the vehicle 30, and in this case also. The plurality of second legs 132-3-2 are adjacent to each other.

  The first receiving portion 131-3-1 is filled with gas in the first receiving portion air chamber. In the second receiving portion 131-3-2, the second receiving portion air chamber is filled with gas. The first leg 132-3-1 is filled with gas in the first leg air chamber. The second leg 132-3-2 is filled with gas in the second leg air chamber.

  The first receiving part air chamber, the second receiving part air chamber, the first leg part air chamber, and the second leg part air chamber are respectively separated. Therefore, the first receiving portion 131-3-1, the second receiving portion 131-3-2, the first leg 132-3-1, and the second leg 132-3-2 are each independently filled with gas. Can be done.

  In the first mode shown in FIG. 6A, the first receiving part air chamber, the second receiving part air chamber, the first leg air chamber, and the second leg air chamber are all filled with gas. . Since the landing platform 13-3 of the first embodiment supports the balloon 10-3 at the time of takeoff and landing at a position higher than the loading platform 31 of the vehicle 30, the landing platform 13-3 is disposed on the payload dome 102-3 provided below the balloon 10-3. It is suitable for maintaining equipment to be performed.

  In the second mode shown in FIG. 6B, the first receiving part air chamber, the second receiving part air chamber, and the first leg part air chamber are filled with gas, and the second leg part air chamber is filled with gas. Not filled with gas. As a result, the landing platform 13-3 is grounded to the bed 31 of the vehicle 30 by the second receiving portion 131-3-2 and the first leg portion 132-3-1, and the upper surface of the first receiving portion 131-3-1. Is inclined with respect to the loading platform 31. The landing platform 13-3 of the second embodiment supports the balloon 10-3 at a position lower than that supported by the landing platform 13-3 of the first embodiment, and thus is suitable for work on the side surface of the balloon 10-3. The work on the side surface of the balloon 10-3 includes, for example, attaching or detaching the mooring line 11-3 to or from the side surface of the balloon 10-3, attaching or detaching equipment to or from the side surface of the balloon 10-3.

  FIG. 7 is a diagram illustrating a positional relationship between the landing platform and the balloon in the moored balloon according to the fourth embodiment.

  In the mooring balloon 1-4 of the fourth embodiment, the landing platform 13-4 has a shape such that the mooring line 11-4 mooring the balloon 10-4 does not interfere with the receiving portion 131-4. When the balloon 10-4 having the scoop 103-4 is moored by the mooring line 11, the mooring angle of the balloon 10-4 is kept within 45 degrees from the zenith. Therefore, the landing platform 13-4 has a structure in which the mooring line 11-4 does not contact the receiving portion 131-4 when the mooring angle from the mooring point (the position of the four-sided roller 14-4) is 45 degrees. In FIG. 6, the description of the scoop 103-4 is omitted.

  When the mooring line 11-4 comes into contact with the receiving portion 131-4 having the height H when the mooring angle is 45 degrees, the inner diameter D3 of the great circle in the torus shape of the receiving portion 131-4 is equal to the height H. . The height H is set on the outer surface of the receiving portion 131-4 from the other end other than the one end connected to the receiving portion 131-4 of the leg 132-4, and the balloon 10-4 lands on the landing platform 13-4. Sometimes the height is up to the contact portion 131-4b where the balloon 10-4 contacts. That is, the height H is made smaller than the inner diameter D3 in order to prevent the mooring line 11-4 from coming into contact with the receiving portion 131-4. Therefore, the height H of the receiving portion 131-4 and the inner diameter D3 of the great circle in the torus shape of the receiving portion 131-4 satisfy the following relationship.

  H <D3 / 2

  The inner diameter D3 of the great circle in the torus shape of the receiving portion 131-4 is determined by the outer diameter D2 of the great circle in the torus shape of the receiving portion 131-4 and the diameter d of the small circle in the torus shape of the receiving portion 131-4. It is represented by the following equation.

  D3 = D2-d × 2

  The outer diameter D2 of the great circle in the torus shape of the receiving portion 131-4 and the diameter d of the small circle in the torus shape of the receiving portion 131-4 are smaller than the balloon diameter D1 in order to stably support the balloon 10-4. It is preferable to have the following relationship.

D2 = D1 × 0.8
d = D1 × 0.07

  Therefore, the height H can be expressed as follows using the outer diameter D2 of the torus shape of the receiving portion 131-4.

  H <D2 × 0.4125

  When the four-sided roller 14-4 is arranged on the installation surface, the mooring line 11-4 is moored from a position higher than the installation surface by the physical height ΔH of the four-sided roller 14-4. Since the above-described height H does not include ΔH (from the upper surface of the four-sided roller 14-4), if the actual height of the receiving portion 131-4 from the installation surface is lower than H + ΔH. Is enough.

  For example, the height H of the receiving portion 131-4 in which the outer diameter D2 of the torus-shaped great circle is 4 m is H> 0.4125 × 4 = 1.65 (m) according to the above equation. Therefore, when the height of the receiving portion 131-4 is set lower than 1.65 m, the receiving portion 131-4 does not contact the mooring line 11-4.

  At this time, if the height ΔH of the four-sided roller 14-4 is 20 cm, the height of the receiving portion 131-4 can be increased by 20 cm. Specifically, when the height of the receiving portion 131-4 is set lower than 1.85 m, the receiving portion 131-4 does not contact the mooring line 11-4.

  FIG. 8 is a diagram illustrating a positional relationship between a landing pad and a balloon in the moored balloon according to the fifth embodiment.

  In the mooring balloon 1-5 of the fifth embodiment, the landing platform 13-5 has a shape that prevents the balloon 10-5 moored at a low altitude from colliding with the ground. When the balloon 10-5 is moored near the ground, the airflow tends to be turbulent near the ground, and the balloon 10-5 may be damaged by contact with the ground due to the turbulent airflow. On the other hand, when the balloon 10-5 according to the present embodiment receives a crosswind while being elevated by about 1 m from the landing platform 13-5, the crosswind can be converted into lift by the scoop 103-5, so that the attitude is stabilized. . Thus, the landing platform 13-5 of the present embodiment has a shape that prevents the balloon 10-5 from colliding with the ground when the balloon 10-5 is moored at a low altitude of 1 m or less.

  The extension amount of the mooring line 11-5 when the balloon 10-5 is at the position P1 indicated by the broken line in FIG. 8 (when supported by the receiving portion 131-5) is defined as the minimum extension amount L. When the mooring line 11-5 is extended from this state by the additional extension amount ΔL, the balloon 10-5 rises. At this time, if there is no wind, the balloon 10-5 is located at the position P2 in FIG. When a strong crosswind is received in a state where the mooring line 11-5 is extended by L + ΔL, the balloon 10-5 rolls over the upper portion of the receiving portion 131-5, and is located at the position P3 in FIG. May be.

  At this time, the mooring cable 11-5 held by the four-sided roller 14-5 is supported by the receiving portion 131-5 along the upper surface of the receiving portion 131-5. The length of the upper half of the circumference of the small circle in the torus shape of the receiving portion 131-5 corresponds to the additional feeding amount ΔL. That is, the additional feeding amount ΔL and the diameter d of the small circle in the torus shape of the receiving portion 131-5 satisfy the following expression.

  ΔL = 1/2 × π × d

  In the landing platform 13-5 of the present embodiment, in order to prevent the balloon 10-5 from colliding with the ground when the additional extension amount ΔL is equal to or less than 1 m, the torus shape of the receiving portion 131-5 must satisfy the following relationship. The diameter d of the small circle at is determined.

  d <2 / π ≒ 0.64 (cm)

  By determining d so as to satisfy the above relation, the movement of the balloon 10-5 is restricted by the mooring line 11-5 until the additional feeding amount ΔL exceeds 1 m. When the additional feeding amount ΔL is 1 m or more, the attitude of the balloon 10-5 is stabilized as described above.

  It will be understood by those skilled in the art that various changes, substitutions and modifications can be made without departing from the spirit and scope of the invention.

1, 1-1-5 Mooring balloon 10, 10-1-5 Balloon 11, 11-1-5 Mooring cable 13, 13-1-5 Mooring balloon landing platform 131, 131-1-5 Receiving part 132, 132- 1-5 legs

Claims (12)

A balloon including a resin bag that has a flat shape when the inside is filled with a gas at a first internal pressure;
A plurality of mooring lines each having one end connected to an outer surface of the balloon;
A landing platform on which the balloon lands, and
The landing platform is
A receiving portion that is a resin bag that forms a torus shape when the inside is filled with gas at a second internal pressure lower than the first internal pressure;
A contact portion disposed on an outer surface of the receiving portion, wherein the balloon contacts the balloon when the balloon lands on the landing platform;
A captive balloon having one end connected to the receiving portion and a plurality of resin-made bag bodies having a columnar shape when the inside is filled with gas.   The tethered balloon according to claim 1, wherein a material of the contact portion is the same as a material of an outer surface of the balloon.   2. The tethered balloon according to claim 1, wherein the material of the contact portion is a material having a larger coefficient of static friction with the material on the outer surface of the balloon than the material on the surface of the balloon. The first internal pressure is 0.3 kPa or more;
The tethered balloon according to any one of claims 1 to 3, wherein the second internal pressure is less than 0.3 kPa.   5. The balloon according to claim 1, wherein, when the balloon is filled with the gas at the first internal pressure, a balloon diameter D <b> 1 which is a diameter of a horizontal cross section is 3 m or more and 9 m or less. The tethered balloon according to the paragraph.   The balloon diameter D1 when the gas is filled inside at the first internal pressure, and the outer diameter D2 of the great circle in the torus shape when the gas is filled inside at the second internal pressure are D1 × 0. 6. The tethered balloon according to claim 5, which satisfies a relationship of 6 ≦ D2 <D1. A balloon having a flat-shaped resin bag when filled with a gas therein, and having a balloon diameter D1 that is a diameter of a cross-section in the horizontal direction of the flat shape,
A plurality of mooring lines each having one end connected to an outer surface of the balloon;
A landing platform on which the balloon lands, and
The landing platform is
A receiving portion, which is a resin-made bag having a torus shape when the inside is filled with gas, wherein an inner diameter D3 of a great circle in the torus shape satisfies a relationship of D1 × 0.68 ≦ D3 ≦ D1,
A captive balloon having one end connected to the receiving portion and a plurality of resin-made bag bodies having a columnar shape when the inside is filled with gas.   The balloon diameter D1 and the height H from the other end other than the one end of the leg to a contact portion disposed on the outer surface of the receiving portion and contacting the balloon when the balloon lands on the landing platform. , H ≧ D1 × 0.35. A balloon including a resin bag that has a flat shape when filled with gas,
A plurality of mooring lines each having one end connected to an outer surface of the balloon;
A landing platform on which the balloon lands, and
The landing platform is
A receiving portion which is a resin bag forming a torus shape when the receiving portion air chamber is filled with gas,
One end is connected to the receiving portion, the leg portion is a plurality of resin-made bag-shaped when the inside is filled with gas, comprising:
Said legs,
A plurality of first legs each having a first leg chamber filled with gas;
A plurality of second legs each having a second leg chamber filled with gas, wherein the second leg chamber is separated from the receiving chamber and the first leg chamber. And a second leg separated from the receiving portion air chamber and the first leg air chamber connected to the receiving portion at positions adjacent to each other in the receiving portion. A balloon including a resin bag that has a flat shape when filled with gas,
A plurality of mooring lines each having one end connected to an outer surface of the balloon;
A landing platform on which the balloon lands, and
The landing platform is
A receiving portion having a torus-shaped resin bag when the inside is filled with a gas, wherein the torus-shaped great circle has an inner diameter of D3;
One end is connected to the receiving portion, and a plurality of resin-made bags forming a column shape when the inside is filled with a gas, wherein the balloon is disposed on the outer surface of the receiving portion from the other end other than the one end. And a leg having a height H to a contact portion with which the balloon comes into contact when landing on the landing platform, wherein the height H satisfies H <D3 / 2.   The captive balloon according to claim 10, wherein the height H and the outer diameter D2 of the great circle in the torus shape satisfy a relationship of H <D2 x 0.4125. A balloon including a resin bag that has a flat shape when filled with gas,
A plurality of mooring lines each having one end connected to an outer surface of the balloon;
A landing platform on which the balloon lands, and
The landing platform is
A receiving portion that satisfies the relationship of d <2 / π, which is a resin-made bag having a torus shape when a gas is filled therein;
An anchoring balloon having one end connected to the receiving portion and a plurality of resin-made bag bodies having a columnar shape when the inside is filled with a gas.

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