JPH0450093A - Water heliport - Google Patents

Abstract

PURPOSE:To constantly keep the upper surface of a heliport body horizontal regardless of waves by providing two rolling-pitching correcting screws driven and controlled in response to the magnitude and direction of inclination of the upper surface of the heliport body. CONSTITUTION:The water heliport 10 has a float 11 whose bottom surface is formed into a spherical surface, a heliport body 12 having a substantially flat upper surface 12a, and two rolling-pitching correcting screws 13, 14 provided so that they can rotate about respective vertical shafts in vertical planes extending through the center of gravity of the float 11 back and forth, and laterally at right angles to each other. Besides, the heliport has a levelness detecting unit 15 for detecting the levelness of the upper surface 12a of the heliport body, and based on its output, a control device 16 drives and controls the rolling-pitching correcting screws 13, 14. Further, the heliport is provided with first-third screws 17-19 for travelling the heliport body, and these screws are controlled by a control device 21 based on detection signals from a position- direction detecting unit 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water helipad that can be installed on the surface of water such as the ocean, lakes, and marshes.

[Conventional technology]

Conventionally, water helipads having the configuration shown in Part 4, for example, are known. That is, Article 47 (A)
As shown in Fig. 4(B), the helipad body 1 is fixed to the seabed using an anchor 2 in the form of a floating platform, or as shown in Fig. 4(B), the helipad main body 1 is mounted on a ship 3. 1
4th (C)
There is a floating pier-like heliport with one end of the heliport main body 1 fixed to a rock wall 4 of a port or the like, as shown in FIG.

[Problem to be solved by the invention]

However, in the case of any type of water helipad, since the water helipad itself floats on the water surface due to buoyancy, no particular measures have been taken to suppress the shaking of the water helipad itself due to waves. It is not easy for an aircraft to land on a water helipad, and when not in use, it occupies a relatively wide area of the water surface, causing problems such as getting in the way of ship navigation or berthing. .

In view of the above points, the present invention suppresses shaking caused by waves, and can be moved to any location when not in use, making landing easy and convenient for navigation and berthing of other ships. The aim is to provide an unobstructed floating helipad.

[Means to solve the problem]

According to the present invention, there is provided a float having a spherical bottom surface, a helipad body provided above the float having a substantially flat top surface, and a heliport body provided above the float at right angles to each other through the center of gravity of the float. a swing correction screw rotatably provided around a vertical axis in two vertical planes extending in the front-rear direction and the lateral direction;
This is achieved by a floating helipad that is equipped with a horizontal detection unit that detects the horizontality of the top surface of the helipad main body, and a control device that drives and controls the shaking correction screw based on the detection signal from the horizontal detection unit. .

[For production]

According to this invention, when in use, the flatness of the helipad body provided on the float is detected by the horizontal detection unit while it is floating on the water surface of the ocean, river, lake, etc., and the top surface of the helipad body at that time is detected. The control device drives and controls the two sway correction screws according to the magnitude and direction of the inclination, so that the longitudinal and lateral directions of the inclination are returned to horizontal by the driving force of the sway correction screws. It has become.

Therefore, since the top surface of the helipad main body is always held horizontally and the bottom surface of the float is formed in a spherical shape, the propulsion force required for correction may be small, and correction can be easily performed. Further, even when the water surface is moving due to waves, the above-described operation is repeated so that the top surface of the helipad body is always level, so that the helicopter can easily take off and land. Furthermore, when not in use, it can be easily moved to a desired location by towing or self-propulsion, so it will not interfere with the navigation or berthing of other vessels.

Preferably, the water helipad according to the present invention is configured such that the sway correction screw can change the pitch, and corrects vertical sway by changing the pitch while always rotating in the same direction. It looks like this. Therefore, when controlling the drive of the shaking correction screw according to the magnitude and direction of the heliport body's inclination, the drive shaft is always rotated in one direction at a predetermined speed, and the helipad body is tilted in the magnitude and direction. By changing the pitch of the shake correction screw according to the
An appropriate amount of upward or downward propulsive force can be obtained, and the inclination caused by the shaking of the helipad body can be corrected more quickly.

The water helipad according to the present invention also includes a first displacement screw rotatably supported around a first horizontal axis at the bottom of the float, and a second displacement screw that is perpendicular to the first horizontal axis. a second moving screw rotatably supported around a second horizontal axis; and a third horizontal axis extending parallel to the second horizontal axis and offset by a predetermined distance. a third moving screw, and a position/direction detection unit that detects the position and direction of the float.

and the control device drives and controls the first, second and third moving screws based on the detection signal from the position/direction detection unit. - Based on the position and direction of the water helipad detected by the direction detection unit, the water heliport is moved along the first horizontal axis by rotating only the first moving screw, and the water heliport is moved along the first horizontal axis. By rotating the second and third moving screws so as to obtain propulsive forces in the same direction, the water helipad is moved along the second and third horizontal axes, and the second and third By rotating the displacement screw so as to obtain a propulsive force in the opposite direction, the water helipad is caused to rotate, so that the water heliport is always maintained in a constant position and orientation with respect to the horizontal direction, that is, above the water surface. This makes it easier for the helicopter to take off and land on the water helicopter, and it can be moved and installed in any desired position and direction.

〔Example〕

Hereinafter, the present invention will be explained in more detail based on one embodiment shown in the drawings.

FIG. 1 shows an embodiment of a water helipad according to the invention.

This water helipad 10 includes a float 11 having a spherical bottom surface, and a helipad body 12 provided above the float 11 and having a substantially flat top surface 12a.
The float 11 is provided rotatably around a vertical axis in two vertical planes passing through the center of gravity of the float 11 and extending at right angles to each other in a front-back direction, for example, the χ direction, and a transverse direction, for example, the Y direction. Swing correction screw 13.14
It has

Furthermore, this water helipad 10 includes a horizontal detection unit 15 that detects the levelness of the upper surface 12a of the helipad main body, and drives the swing correction screws 13 and 14 based on a detection signal from the horizontal detection unit 15. A control device 16 for controlling a first horizontal axis P at the bottom of the float 11
a first displacement screw 17 rotatably supported around a second displacement screw 17 rotatably supported around a second horizontal axis Q perpendicular to this first horizontal axis P; a third moving screw 19 rotatably supported around a third horizontal axis Q' extending parallel to the second horizontal axis Q by a predetermined interval; a position/direction detection unit (20) provided in the heliport body 12 to detect the position and direction of the heliport 11;
Based on the detection signal from the position/direction detection unit 20, the first, second and third moving screws 17°1
8.19, and a control device 21 that drives and controls the 8.19.

The swing correction screws 13, 14 are constructed as shown in detail in FIG. 2, and the correction screws 13 will be described below.

This correction screw 13 includes a hollow rotating shaft 23 that penetrates downward from inside the helipad main body 12 and is rotatably supported by a bearing 22, and a case that is integrally attached to the lower end of this rotating shaft 23. A propeller shaft 25, 26 is rotatably supported so as to project in a straight line on both sides in the horizontal direction from 24, and a pitch changer is fitted into the hollow interior of the rotary shaft 23 and whose lower end extends into the case 24. axis 2
7.

As shown in FIG. 3A, the horizontal detection unit 15 includes a gyro 15a15b capable of detecting inclination angles, that is, pinch angles and roll angles in two directions perpendicular to each other, in the illustrated case, the longitudinal direction and the lateral direction. , each gyro 15a
, and amplifiers 15c and 15d that amplify the detection signals output from 15b, respectively.

As shown in FIG. 3(B), the position/direction detection unit 20 includes a gyro 20a for detecting a rotation angle with respect to a reference horizontal direction, and an accelerometer in the horizontal direction, that is, in the case of the illustration, in the vertical direction. 20b, an accelerometer 20c in a horizontal direction perpendicular to the two horizontal directions, that is, in the horizontal direction in the illustrated case, and the gyro 20a and the accelerometer 20b.
, 20c, respectively.

A gear 23a is attached to the upper end of the rotating shaft 23, and this gear 23a is connected to the drive pinion 28 of the motor 28.
By being meshed with a, the motor 28 rotates the case 24 and the propeller shafts 25 and 26, thereby driving the case 24 and the propeller shafts 25 and 26 to rotate integrally.

The pinch changing shaft 27 has an upper end attached to a hydraulic cylinder 29, and is moved up and down within the rotary shaft 23 by the operation of the hydraulic cylinder 29, and a lower end is attached to the inner end of the propeller shaft 25, 26. A pair of racks 27a and 27b are provided which respectively hold the attached pinions 25a and 26a from opposite sides. As a result, the hydraulic piston 29 operates from the state shown in FIGS. 2(A) and 2(B), for example, and the pinch change shaft 2
7 moves upward, the racks 27a and 27b also rise, causing the propeller shafts 25 and 26 to rotate in opposite directions. In this case, the propeller shaft 25
It is rotated clockwise in figure (B). At the outer ends of the propeller shafts 25 and 26 are propellers 25b and 26b, respectively.
If the propeller shaft 25 is attached to the propeller shaft 25, the pitch of the propeller 25b will be changed from the position shown by the solid line to the position shown by the chain line in FIG. 2(B). The hydraulic cylinder 29 can be activated by appropriately controlling the hydraulic pressure from the hydraulic unit 29a by operating the servo valve 29b based on a control signal from the control device 16.

The embodiment of the present invention is constructed as described above, and in use, both of the swing correction screws 13 and 14 are connected to the motor 2.
8 rotates around the rotating shaft 23 at a constant speed,
At that time, if the water helipad 10 is horizontal,
Based on the detection signal output from the horizontal detection unit 15, the hydraulic cylinder 29 is operated by operating the servo valve 29b by the control device 16,
By moving the pinch changing shaft 27 up and down and rotating the propeller shaft 2526, the propellers 25b and 526b are held horizontally, so that the propeller 2
Since there is no propulsive force in either the up or down direction due to the rotation of 5b and 26b, the water helipad lo is held horizontally as it is.

Here, when the floating helipad 10 is swayed in a certain direction due to movement of the center of gravity due to takeoff and landing of the helicopter or due to waves, the inclination is detected by the two gyros 15a, 15i) of the horizontal detection unit 15, and the detection signal is By operating the control device 16 casaho hull 29b based on the above, the pitch changing shaft 27 is moved up and down, and the propellers 25b, 2 of the swing correction screw 13.14 are
The propellers 25b, 26b are rotated by engagement of the racks 27a, 27b and the pinions 25a, 26a so that the pitch angle of the helipad 5b generates a propulsive force that returns the water helipad (10) horizontally. As a result, the water helipad 10 is returned to the horizontal position.

In this case, since the bottom surface of the float 11 is formed in a spherical shape, the float II does not have a large restoring force when it is tilted, and moreover, it is easily returned to the horizontal state. Furthermore, since the direction of the propulsion force of the shaking correction screws 13.14 is changed by simply changing the pinch angle of the propellers 25b and 26b of each screw 13.14, the propulsion force can be switched relatively quickly. It can be done.

Furthermore, when the water helipad 10 deviates from a predetermined position in the horizontal direction, the position/direction detection unit 20
However, since the rotation angle is detected by the gyro 20a and the movement amount in two horizontal directions is detected by the two accelerometers 20b and 20c, the control device 21 first detects the rotation angle detected by the gyro 20a. By rotating the moving screws 18 and 19 so as to generate propulsive forces in opposite directions, the rotation angle of the water heliport 10 is returned to the desired rotation angle, and each accelerometer 20b, 20c is then rotated. Based on the amounts of movement in the two horizontal directions detected by The water helipad 10 is thus returned to the position and rotation angle , and thus the water helipad 10 can be held at a constant position in the horizontal direction.

The sway correction screws 13, 1.4 and the moving screws 17, 18.19 are not limited to the mounting positions and numbers shown in the embodiments, and any number of them may be installed at any location. It is clear that it is possible.

〔Effect of the invention〕

As described above, according to the present invention, the flatness of the helipad body is detected while it is floating on the water surface, and two swing correction screws are driven according to the magnitude and direction of the top surface inclination at that time. Through control, the inclinations in the longitudinal and lateral directions are maintained horizontally. Since the bottom surface of the float is spherical, the propulsion required for correction is small, so it can be easily corrected, and even when the water surface is moving due to waves, the top surface of the helipad body Since the plane is always horizontal, the helicopter can easily take off and land.

Furthermore, when not in use, it can be easily moved to a desired location by towing or self-propulsion, without interfering with the navigation or berthing of other vessels.

Thus, according to the present invention, even in the open ocean where the waves are rough, shaking caused by waves can be suppressed, and since it can be moved to any location, landing is easy and it is easy to navigate and anchor other ships. A very good out-of-the-way floating helipad would be available.

[Brief explanation of drawings]

FIG. 1(A) is a schematic side view showing an embodiment of the water helipad according to the present invention, and FIG. 1(B) is a schematic bottom view. Figure 2 (A) is an enlarged cross-sectional view of the shaking correction screw of the water helipad in Figure 1, Figure 2 (B) is a cross-sectional view taken along line BB,
C) is a sectional view taken along line C-C, FIG. 3(A) is a block diagram showing control of horizontal detection in the embodiment of FIG. 1, and FIG.
FIG. 3 is a block diagram showing control of direction detection. FIGS. 4(A) to 4(C) each illustrate a conventional water helipad. 10... Water helipad; 11... Float; 1
2...Helipad body; 12a...Top surface; 1
3, 14... Screw for shaking correction; 15... Horizontal detection unit; 15a, 15b... Gyro; 16
, 21...control device; 17,18.19...movement screw;20...position/direction detection unit);
20a... Gyro; 20b, 20c... Accelerometer; 22... Bearing, 23... Rotating shaft: 24...
Case, 25.26...Propeller shaft; 25a, 26a
...Binioff: 25b, 26b--propeller;
27...Pitch change axis; 27a, 27b...
Rack; 28...Motor; 29...Hydraulic cylinder. 87a (A) Figure 2

Claims (3)

[Claims] (1) A float whose bottom surface is formed into a spherical shape, a helipad body provided above the float and which has a substantially flat top surface, and a helipad body that is arranged at right angles to each other through the center of gravity of the float in the longitudinal and lateral directions. a swing correction screw rotatably provided around a vertical axis in two vertical planes extending in the direction; a horizontal detection unit for detecting the levelness of the upper surface of the helipad body; and a horizontal detection unit. A water helipad comprising: a control device that drives and controls the shaking correction screw based on a detection signal from the unit. (2) The shaking correction screw is configured to be able to change its pitch, and by changing the pitch while always rotating in the same direction, vertical shaking is corrected. The water helipad according to claim 1, characterized in that: (3) a first displacement screw rotatably supported around a first horizontal axis at the bottom of the float; and a second horizontal axis perpendicular to the first horizontal axis; a second moving screw rotatably supported therearound; and a third movable screw rotatably supported around a third horizontal axis extending parallel to the second horizontal axis and offset by a predetermined interval. The control device includes a moving screw and a position/direction detection unit that detects the position and direction of the float, and the control device includes:
Based on the detection signal from the position/direction detection unit,
3. The water helipad according to claim 1, wherein the first, second, and third moving screws are drive-controlled.