JPH06298177A - Oscillating fin propulsion ship - Google Patents

Abstract

PURPOSE:To provide a caudal fin propulsion ship possible to operate only by foot rowing without especially providing a rudder. CONSTITUTION:A caudal fin part 3 is provided on a hull 2 free to oscillate through an elastic plate. In a cockpit 4 of the hull 2, a crank type pedal driving part 20 constituting a drive mechanism 19 is provided and made free to step on it, and driving force of this pedal driving part 20 is transmitted to a crank driving output part 22 through an adjustable-speed motor 21. On the crank driving output part 22, one ends of left and right wires 33A, 33B are fixed, and these wires 33A, 33B are extended through pulleys 34, 35, 37 and connected to the elastic plate of the caudal fin part 3. Consequently, when the pedal driving part 20 is rowed, the wires 33A, 33B are reciprocally driven to the opposite direction, the caudal fin part 3 is oscillated and driving force is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oscillating fin propulsion ship configured to oscillate a tail fin part to the left and right to propel a hull.

[0002]

[Background Art] The idea of a ship configured to swing like a fish by swinging its tail fins to the left and right has been applied to less than 60 applications since 1969 even if only Japanese related applications are considered (international. Classification B63H 1/36). Among the inventions (inventions) disclosed in these applications, there are 4 to 5 cases related to the present invention.

For example, among them, the inventions of JP-A-54-104193 and JP-A-53-594, which are particularly related to the present invention, adopt a method of propelling a hull by swinging a tail fin. ing. However, in both cases, the driving source provided in the center of the hull propels the vehicle through the left and right swinging mechanism of the tail fin. When the present inventor actually moved the ship by a tail fin propulsion type similar to this, although it moved forward, its propulsion efficiency was relatively low and propulsion power could not be increased like fish. there were. Also, in the conventional tail fin propulsion type ship, a person gets on the ship,
It is not designed to swim in lakes, ponds, sea, etc.,
There was no such ship in the world.

[0004]

In the conventional tail fin propulsion method, since the tail fin is simply swung to the left and right, the occurrence of Karman vortices along the longitudinal direction of the tail fin is extremely small. The inventor noticed. According to one study, a large number of Karman vortices are generated along the longitudinal direction of a fish body due to the S-shaped and reverse S-shaped movement of the fish body during swimming. That is, when the tail fin of the fish is carefully observed, it can be seen that the tail fin of the fish changes and propels the fish body into an S-shape and an inverted S-shape. Therefore, the conventional propulsion system that does not perform such an operation cannot exhibit sufficient propulsion efficiency.

The present invention has been made in view of these conventional technical problems, and a first object thereof is to provide an oscillating fin propulsion ship which can realize a movement similar to that of a tail fin of a fish. A second object is to provide an oscillating fin propulsion ship that can drive the tail fin propulsion manually.

[0006]

According to the present invention, a fin is fixed to a tail portion of a substantially fish-shaped hull via an elastic plate, and the elastic plate is rocked by a wire via a crank driven by a foot pedal. An oscillating fin propulsion ship that moves and propels the hull.

Specifically, in an oscillating fin propulsion ship configured to oscillate the tail fin part to the left and right, the hull formed into a substantially fish-like shape and the left and right parts at the rear part of the hull part An elastic plate that is freely bendable, a fin that is fixed to the rear end of the elastic plate, and a foot pedal that is fixed to the bottom of the hull via a frame on the input side and supported by a crank, and A drive mechanism that also has a crank on the output side and that transmits power between both cranks, and one end side is connected to the output end of the output side crank of the drive mechanism, respectively At least two wires that flexibly bend and bend the elastic plate member are connected to predetermined positions on the opposing surfaces of the plate, and the foot pedal is provided with either forward or reverse or alternating forward and reverse. Give rotation The Rukoto, giving the swing motion to the tail fin unit, a swing fin propulsion ships, characterized by controlling the propulsion or steering the boat.

In the present invention, the drive mechanism is preferably capable of shifting in a plurality of stages by using an accelerating / decelerating device.
The elastic plates are preferably composed of composite plates found in the two skis, with fins sandwiched between the composite plates. Furthermore, at least one pair of wire guide wheels, that is, one guide wheel with which each wire connected to the facing surface of the elastic plate is engaged, is supported by pulley supporting wings that extend to the left and right sides of the hull. Preferably.
At this time, the guide wheel supported by the pulley supporting vanes may be an eccentric cam portion.

[0009]

In the structure of the present invention, when the foot pedal is depressed, the crank is driven via the drive mechanism, and the wires having one ends connected to both output ends of the crank are alternately moved in opposite directions. As a result, the tail fin portion connected to the other end of the wire swings, and the hull is propelled as if a fish were swimming. At this time, since the tail fin is supported via the elastic body, the elastic body drawn by the wire is bent and bent alternately in opposite directions to efficiently propel it while forming a Karman vortex around it. Becomes On the other hand, when bending the traveling direction, that is, when turning, confirm the bending direction of the tail fin portion by the angular position of the foot pedal,
If the position of the foot is fixed in that state, the vehicle turns when the bent inner side is the turning center side. That is, if the pedal is stopped at the position where the tail fin is bent so that the right side is inside, the pedal turns to the right, and if the left side is stopped inside, the pedal turns to the left. Further, when the tail fin is bent to the right or left, the pedal can be propelled while bending if the pedal makes a swinging motion of a small angle in the forward and reverse directions.

If the drive mechanism is capable of shifting, the torque of the crank on the output side is reduced by increasing the torque at the start of propulsion, and when the propulsion speed increases, the rotational speed of the crank increases to increase the acceleration direction. You can also switch to. If the elastic plate is made of an artificial composite material such as plastic or a natural composite material such as bamboo, good elastic force can be exhibited. Moreover, if the guide wheel is supported by the pulley supporting wings that extend from the hull, the moment of the elastic plate can be large, and a larger propulsive force can be obtained, and
The restoring force of the hull can be increased and stable propulsion can be performed.

[0011]

Embodiments of the swing fin propulsion ship according to the present invention will be described below. 1 to 4 show the overall structure of a swing fin propulsion ship 1 for a single passenger according to a first embodiment of the present invention. The propulsion ship 1 includes a hull 2, and the internal composition of the hull 2 is shown in FIGS. 5 to 7. The hull 2 is formed into a leaf shape when viewed in a plan view, and a tail fin portion 3 is continuously provided at a rear portion of the hull 2 to have a substantially fish body shape as a whole. The center of the hull 2 is formed into a concave cross section, and a cockpit 4 is provided at the rear of the concave portion so that the operator P
(See FIG. 5) can be seated forward.

The hull 2 is, as shown in FIGS.
A bottom center rib 5 made of aluminum square bar or the like is provided, and a plurality of U-shaped ship-side ribs 6 are fixed to the center rib 5 at predetermined intervals, and the left and right port-side ribs 7 are provided at the upper ends of these ship-side ribs 6. Is fixed, and the general ship shape of the hull 2 is configured with high rigidity. A skin 8 made of glass fiber or other fiber reinforced plastic (FRP) is provided so as to cover the bottoms of the ribs 5 to 7 of the hull 2, the periphery of the ship side, and the upper part (deck) excluding the cockpit 4 so as to cover them. A hood 9 made of hard plastic is provided above the cockpit 4 to protect it from waves and wind. Further, a ballast keel 10 is provided on the bottom surface of the hull 2 to prevent the hull 2 from meandering due to the swinging motion of the tail fin portion 3 and also to prevent the rolling due to the wind.

The tail fin portion 3 provided at the rear of the hull 2 is
An elastic plate 11 is provided inside, and a base end 11A of this elastic plate 11 is provided.
Are rotatably supported by fulcrum ribs 12 provided at the rear of the hull 2. A locking rib 13 is provided between the bottom center rib 6 and the port side rib 7 behind the fulcrum rib 12, and the elastic plate 11 is provided on the locking rib 13.
Is provided with two pin holes 13A capable of supporting the tail fin 3 at two positions, a lower position where the tail fin portion 3 is in water and an upper position where the tail fin 3 is raised above the water surface (see FIG. 6). Elastic plate 11
As shown in FIG. 8, the base end 11A is a bifurcated hull mounting portion 14, and from this mounting portion 14 to the rear end 11B.
The elastically deforming portion 15 is made of a bamboo material that is made thin and has flexible elasticity. V-shaped and flexible fins (tail fins) 16 made of a plastic plate such as polypropylene, low-foamed vinyl chloride, and polyurethane rubber are sandwiched at the tips of the elastically deformable portions 15. An elastic vinyl chloride fin sheet 17 is attached around the elastic plate 11 and the fins 16, and the front portion of the tail fin sheet 17 is integrally connected to the skin 8. At this time, the rear portion of the elastic plate 11 and the fin 16 may be exposed without being covered with the sheet 17.
Further, as shown by the chain double-dashed line 18 in FIG. 5, a large number of expanded polypropylene tapes may be wound around the elastic plate 11 in the sheet 17 to shape the outer shape of the sheet 17. Further, when the elastic plate 11 is exposed, if the tail fin portion 3 behind the elastic plate 11 can be separated, it can be conveniently carried.

In front of the cockpit 4 of the hull 2,
The drive mechanism 19 is fixed to the bottom center rib 5.
The drive mechanism 19 has a structure similar to a bicycle pedal and a speed change mechanism. That is, the drive mechanism 19 is roughly divided into a pedal drive section 20 driven by human power on the input side, a multi-stage intermediate speed sprocket, a chain, etc., and an acceleration / deceleration machine 21, a crank drive output section 22, and a crank drive output section 22 as a power transmission mechanism. It is composed of a frame 23 and the like for supporting them. The pedal drive unit 20 includes a crank shaft 25 that supports the pedal 24, a sprocket 26 is fixed to the center of the crank shaft 25, and both ends of the crank shaft 25 are supported by a frame 23 via bearings (not shown). There is. The accelerating / decelerating device 21 is composed of a plurality of small-diameter sprockets, chains, and the like, and the sprocket is supported by a frame 23 via bearings so as to be rotatable in the forward and reverse directions. . The switching sprocket 27 is switched by a switching lever 29 provided on one of the two handles 28 held by the operator P.

The crank drive output section 22 has the same structure as the pedal drive section 20, and includes a crank 30 supported by a frame 23. A sprocket 31 is fixed to the center of the crank 30, and the left and right ends of the crank 30 are formed at positions where the phases are different by 180 degrees, and the wire attachment ring 32 is freely rotatable at the end serving as the output end. Supported by. Each wire mounting ring 32 has a wire 3 made of stainless steel or the like.
One end of 2A, 32B is fixed. Each wire 33
The other ends of A and 33B are provided on the left and right sides of the hull 2 with a first pulley 34 rotatably supported on the frame 23 of the drive mechanism 19, a second pulley 35 rotatably supported on the bow side of the hull 2, and the like. The third rotatably supported by the protruding pulley support wing 36
It is extended to the tail fin 3 side via the pulley 37, that is, each guide wheel, and its end is fixed to the fin fixing portion (root portion) of the elastic plate 11.

Next, the operation of this embodiment will be described.
When the operator P seated in the cockpit 4 manually rotates the foot pedal 24 in either one of forward rotation, reverse rotation, or forward / reverse reciprocal rotation, the acceleration / deceleration device 21 as a power transmission mechanism of the drive mechanism 19 is activated. The crank 30 is rotationally driven via the. As a result, each wire 33A, 33B fixed to the wire mounting ring 32 at the tip of the crank 30 is
It reciprocates alternately with a phase difference of 80 degrees.
For this reason, the tail fin portion 3 oscillates while deforming into an S-shape or an inverted S-shape in combination with the elastic force of the elastic plate 11 and the flexibility of the fins (tail fins) 16, thereby propelling the hull 2. . In addition, the left and right pulley supporting wings 36 not only create a moment, but also have an effect on the restoration of the hull 2 like a jumble, which enables stable propulsion.

When the pedal 24 is driven by human power, the load applied to the foot is large at the beginning of pedaling the pedal 24. Therefore, the switching lever 29 is operated to set the gear ratio of the accelerating / decelerating device 21 to a small speed increasing ratio, or in some cases. Slow down so you can row lightly. When the tail fin propulsion ship 1 starts to move forward and the load on the legs decreases, the switching levers 29 are sequentially switched,
Acceleration is performed with a large speed increasing ratio. At this time, the selection of the torque can be arbitrarily set by changing the acceleration / deceleration ratio of the acceleration / deceleration device 21 of the drive mechanism 19.

When the foot pedal 24 is continuously driven, the propulsion ship 1 goes straight, but when it is desired to turn left or right,
From the relationship between the position of the foot and the bending direction of the tail fin portion 3 which is known in advance, by stopping the foot at an appropriate position,
A desired turn can be performed. For example, if the left end of the crank 30 is located on the stern side and the right end is located on the bow side when the right leg is extended and the left leg is bent,
One end of the left wire 33A on the drive mechanism 19 side is pulled toward the stern side, while one end of the right wire 33B is driven toward the bow side. Therefore, the wire 33A on the left side pulls the tail fin 3 inward, while the wire 33B on the right side is loosened, so that the tail fin 3 is bent with the left side inside. If you stop your foot in this state, the tail fin propulsion ship 1 will move due to the inertial force that has advanced and the left turn of the tail fin part 3,
It turns to the left. On the other hand, in the case of a right turn, the right leg may be bent and the left leg may be extended in the opposite manner to the above. At this time, the turning direction and the bending and straightening of the left and right feet may be reversed, and in short, the position of the foot and the turning direction may be set to be constant. Further, with the tail fin 3 bent, the pedal 2
When 4 is reciprocally driven at a small angle forward and backward, it can be propelled in a bent state.

FIG. 9 shows a schematic configuration of the second embodiment of the present invention. Here, the same or corresponding components as in the first embodiment are designated by the same reference numerals, and the description will be omitted or simplified. In this embodiment, the operator P is placed in the center of the ship, and the driving mechanism 19 is provided at the rear of the operator P.
This is an example in which the power transmission mechanism 21A and the crank drive output unit 22 which are simply configured by a chain or the like without the accelerating / decelerating device in FIG. At this time, in order to provide the crank drive output part 22 at the rear part of the operator P, it is necessary to dispose the sprocket and the chain of the power transmission mechanism 21A below or to the side of the operator P. Therefore, when arranging these parts below, it is necessary to raise the seating position of the operator P or to project the bottom of the ship downward. However, raising the seating position raises the center of gravity and reduces the stability of the ship,
It is preferable that the power of the pedal drive unit 20 be transmitted to the crank drive output unit 22 side by lowering the bottom of the ship or utilizing the side of the operator P. Note that, also in this embodiment, an acceleration / deceleration device may be provided, but it is necessary to devise a positional relationship with the operator P.

FIG. 10 shows the essential parts of a third embodiment of the present invention. The reference numerals in this third embodiment are also the same as those in the second embodiment. In the third embodiment, the left and right two wires 33
An eccentric cam portion 38 is provided in the middle of A and 33B, and the tail fin portion 3
The fin 16 is snapped so that the fin 16 is snapped so that the propulsive force is increased in the vicinity of the end of the bending operation of (2) (late operation).

That is, in FIG. 10, the third pulley 32, which is a left and right guide wheel rotatably supported on the hull 2, is wound with an appropriate amount of the ends of each wire 33A, 33B, for example, about a half turn. The end is fixed. Each pulley 3
An eccentric cam part 38 is integrally fixed to the eccentric cam 2, and one end of each of the wires 133A and 133B forming the tail fin side extension of each wire 33A and 33B is appropriately amounted to the eccentric cam part 38. The ends are fixed by being wound around, and the other ends of the wires 133A and 133B are connected and fixed to the connecting portions between the elastically deforming portion 15 of the elastic body 11 and the fins 16. The eccentric cam portions 38 are arranged such that when the elastic body 11 is in the neutral position shown in the drawing, the large diameter side (bulging side) of the eccentric cam portion 38 is symmetrical to the inside.

Thus, for example, the left wire 33A
When is pulled in the direction of arrow S, the left third pulley 32 and the eccentric cam portion 38 are rotated in the direction of arrow T, and the left extension wire 133A is wound around the eccentric cam portion 38. At this time, the winding amount of the wire 133A gradually increases due to the eccentric action of the eccentric cam portion 38, and in the latter half of the operation, the elastic plate 11 is moved so as to be largely bent to the left to give a snap force to the fins 16 so that the thrust Is increased. On the other hand, the right wire 33B is loosened in the direction of arrow U, and the right extension wire 133B is moved in the direction in which it is unwound from the eccentric cam portion 38 as the elastic plate 11 is bent to the left. Along with this, the third pulley 32 rotates in the arrow V direction and the wire 33B is wound in the same direction. At this time, in the wire 133B, a portion having a large eccentricity is rewound in sequence, and the amount is synchronized with the winding amount of the wire 133A on the left side, so that the elastic plate 11 is flexed smoothly. In the third embodiment, the effect of the eccentric cam portion 38 can add the effect of further increasing the propulsive force.

In the third embodiment, the third pulley 32 may also be eccentrically supported, and by doing so, it is possible to make the snap more effective. Further, as shown by a chain line in FIG. 10, a connecting member 39 is provided between the eccentric cam portions 38.
The cam portions 38 may be forcibly interlocked with each other.

The present invention is not limited to the above-mentioned embodiments, and improvements, modifications and the like within the scope of achieving the object of the present invention are included in the present invention. For example,
The accelerating / decelerating device 21 is not limited to one using a sprocket, a chain, etc., but may be another mechanism such as one using a timing pulley, a timing belt, etc., or one using a gear train. Also,
The elastic plate 11 of the tail fin portion 3 is not limited to the one using bamboo, and a composite plate material such as a ski, for example, a combination of an aluminum plate and a plastic plate, GFRP, a metal spring plate, or other materials may be used. Furthermore, the hull 2 and the tail fin 3
The skin 8 and the sheet 17 for covering the periphery of the are not made of FRP or vinyl chloride, but may be made of rubber, waterproof canvas, wood, aluminum plate, or other materials. However, the sheet 17 on the tail fin side needs to be flexible. Further, two or more wires 32A and 32B may be used for the purpose of strength. In addition, the frame of the hull 2, the handle 28, and the like may have different configurations.

[0025]

According to the present invention, since the fin of the fish and the hull are integrally formed, the operator can freely roam lake water and the like as if he / she was a fish, and can enjoy boating on the water. You can enjoy it. In addition, the boat of the present invention is a paddle boat, and since the tail fin portion serves both as the propulsive force and the rudder (selecting the turning direction), the operability is good. Further, since there is a degree of freedom in the hand, it is suitable especially when fishing. Further, the driving force of the pedals of the foot pedal is greatly reduced by the drive mechanism and the guide wheel, and the moment is reduced, so that the operator does not pedal with such a great force and performs comfortable driving. In addition, there is an effect that the boat speed can be freely controlled by the number of rotations of the operator's stepping.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall configuration of a first embodiment of the present invention.

FIG. 2 is a side view of the first embodiment.

FIG. 3 is a front view of the first embodiment.

FIG. 4 is a plan view with the hood of the first embodiment removed.

FIG. 5 is a sectional view of the first embodiment.

FIG. 6 is a side view showing the skeleton of the hull of the first embodiment.

FIG. 7 is a plan view showing the skeleton of the hull of the first embodiment.

FIG. 8 is a plan view showing an elastic plate of a tail fin portion used in the first embodiment.

FIG. 9 is a perspective view showing a schematic configuration of a main part of a second embodiment of the present invention.

FIG. 10 is a plan view showing a schematic configuration of a main part of a third embodiment of the present invention.

[Explanation of symbols]

 1 Tail fin propulsion ship 2 Hull 3 Tail fin 11 Elastic plate 15 Elastic deformation part 16 Fin (tail fin) 19 Drive mechanism 20 Pedal drive part 21 Accelerator / decelerator as a power transmission mechanism 21A Power transmission mechanism 22 Crank drive output part 24 Pedal 29 Switching lever 30 Output side crank 33A, 33B Wire 34 First pulley as guide wheel 35 Second pulley as guide wheel 36 Pulley supporting blade 37 Third pulley as guide wheel 38 Eccentric cam part P Operator

Claims (6)

[Claims] 1. A swing fin propulsion ship configured to swing the tail fin portion to the left and right for propulsion, and a hull formed into a substantially fish shape and capable of freely bending left and right at the rear portion of the hull. An elastic plate, a fin fixed to the rear end of the elastic plate, and an input side fixed to the bottom of the hull via a frame,
While having a foot pedal supported by the crank,
A drive mechanism that also has a crank on its output side and that transmits power between these cranks, and one end side is connected to the output end of the output side crank of the drive mechanism, respectively And at least two wires that flexibly bend the elastic plate material by connecting the other ends to predetermined positions on the opposing surfaces of the elastic plate, and the foot pedal is provided with either forward or reverse or forward or reverse. An oscillating fin propulsion ship, characterized by imparting oscillating motion to the tail fin portion by applying alternating rotations to propel the ship or control the rudder. 2. The swing fin propulsion ship according to claim 1, wherein the drive mechanism is provided with an accelerating / decelerating device so that the speed can be changed in a plurality of steps. 3. The swing fin propulsion ship according to claim 1, wherein the elastic plate is made of a composite material, and the fins are sandwiched between two composite materials. 4. The swing fin propulsion ship according to claim 1, wherein at least a pair of the guide wheels are supported by pulley supporting wings extending to the left and right sides of the hull. 5. A wire on the crank side and a wire on the tail fin portion are wound around and locked to the eccentric cam part, respectively, in the middle of each wire through an eccentric cam part. The swing fin propulsion ship according to any one of claims 1 to 4. 6. The swing fin propulsion ship according to claim 1, wherein the output side crank of the drive mechanism is provided on the tail fin side which is behind the operator.