JPH072479B2 - Rocking propulsion ship - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an improvement in a propulsion device by the force of a human foot of a ship mainly used for sports and leisure, and in particular, has a simple structure at the time of start. It is about a small boat that can run efficiently from.

(B) Conventional technology Conventionally, as a ship that is run by the power of human foot, the first is to operate the water wheel by stepping on the pedal. Secondly, there is a fin provided at the rear of the hull so that it can be swung up and down by a spring, and the fin moves to move forward by standing on the hull and rocking the hull up and down.

Thirdly, patents 61-104509 and 62- pending by the applicant.
There are things like the swinging of the fin like 201555.

(C) Problems to be Solved by the Invention The first of the above-mentioned conventional methods has poor propulsion efficiency and requires a rudder interlocking with a steering wheel or the like to change the traveling direction. However, the second type requires a large amount of force for the small vertical stroke of the fin in order to swing the entire hull up and down, resulting in large fatigue and poor efficiency. The third type has the drawbacks that the angle of the water flow with respect to the fin at the start is large and the wake is disturbed so that a large propulsive force cannot be obtained, and the maneuverability is slightly poor. The present invention is intended to provide a rocking propulsion device which eliminates the above-mentioned drawbacks of the prior art and has good propulsion efficiency from the start and good maneuverability.

(D) Means for Solving the Problems Therefore, the present invention is, as a first means for solving the above-mentioned drawbacks, in a ship provided with wing-shaped fins protruding from the hull into the water, the fins being in the forward direction. To provide a rocking propulsion ship having a rounded edge and a sharp trailing edge and having a high rigidity, two inverted V-shaped pieces provided in water, and the positions of which are set before the center of gravity of the whole. The second means is to provide a rocking propulsion ship in which the fin has a high rigidity at the leading edge and is made of an elastic material near the trailing edge. (EN) Provided is a rocking propulsion ship having a plate-shaped rudder provided rearward by a tilted pivot shaft.

(E) Example The structure of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the structure of an embodiment of the present invention, FIG. 2 is a top view thereof, and FIGS. 3 (A) and 3 (B) are aa 'and bb'.
FIG.

In FIGS. 1, 2, and 3, a wing-shaped fin 2 is fixedly provided on both sides of the hull 1 with its diagonally downward direction. As shown in FIG. 3, the fin 2 has a rounded front edge 2-1 and a sharply pointed trailing edge 2-2, which is similar to an aircraft airfoil cross section. However, it is a symmetrical wing without so-called chordal sled. Further, as shown in FIG. 2, the fin 2 is attached before the center of gravity position O and is also attached by being inclined forward by an angle α. The center of gravity position O includes a rider (not shown).

FIG. 4 is a perspective view showing the structure of another embodiment of the present invention, FIG. 5 is a partial plan view thereof, and FIG. 6 is a partial side view thereof.

4, 5, and 6, the hull 11 has a rounded bottom, and a rod-shaped arm 12 is attached to the hull 11 so as to face obliquely downward. It is fixed. A ring 14 is formed at the tip of the chord member 13, and one apex of a triangular flexible fin 16 is attached via a spring 15 and a hole 20 is formed by a plurality of rings 19 on opposite sides.
Is connected to the arm 12 via.

Reference numeral 18 denotes a rudder, which is rotatably attached to the stern by its own weight via a shaft 23 inclined by an angle β. 17 is a rope that the rider grasps to balance in the front-back direction.

FIG. 7 is a partial plan view of another embodiment of the present invention.

In FIG. 7, reference numeral 31 is a tongue portion fixed to the hull 11, and at the base of the arm 32, a cylindrical portion 34 for inserting the chord member 33 and a hole 36 for inserting the bolt 35 are provided. . The cylindrical portion 34 is provided with a slit (not shown) so that the chord member 33 can be fixed at the same time by tightening the tongue portion 31 with the bolt 35. Further, the arm 32 and the chord member 33 are rod-shaped, and the fin 37 is flexible and is made of a material such as rubber or soft plastic which can be stretched to some extent, and the arm 32 and the chord member 33 are provided on two sides of the triangle. It has deep holes 38 and 39 for inserting.

(F) Action Next, the action of the present invention will be described.

In FIGS. 1, 2, and 3, when the hull 1 is now stopped and a rider (not shown) stands on the hull 1 and leans on his right foot, the hull 1 leans to the right and at the same time underwater. There is a fin 2 protruding in an inverted V shape from the hull 1 in front of the center of gravity O, and the force of the water hitting the fin 2 due to the shaking of the hull 1 causes the right fin 2 to move to the upper right and the left fin 2 Since it occurs in the lower right of, it turns to the right due to its combined force. The force generated on the left and right fins 2 in such a state will be described with reference to FIGS. 3 (A) and 3 (B).

FIG. 3 (A) shows the action of water on the right side, and FIG. 3 (B) shows the action of water generated on the left fin 2.

The flow of water generated in the fin 2 on the right side becomes like the flow W1 obliquely from below and below due to the swinging and turning motions of the hull 1 as described above. At the front edge 2-1 of the fin 2, the flow W1 is slightly rounded like W2 because it is rounded, and at the rear edge 2-2 it is sharp, so it can wrap around. Without vortexing, it becomes like W3.

Therefore, the direction of water flow W1 does not change much like W2 and W3 even after hitting the fin 2, and the force F1 generated by this does not change.
Will be directed forward and upward. As shown in FIG. 3 (B), the movement of water generated on the fin 2 on the left side is from the diagonally upper front direction, as shown by W4, as opposed to the right side. The flow W4 is bent backward at the front edge 2-1 of the fin 2 along the roundness thereof like W5. At the trailing edge 2-2, since it is sharply pointed, the trailing edge 2-2 cannot turn around and is bent backward by being pushed by the backward flow from the leading edge like W6. W4 is W5, W6
When the fins 2 are bent in the direction of, a lift force F2 is generated on the fins 2, and the direction becomes large diagonally downward and frontward.

Since the forces F1 and F2 acting on the left and right fins 2 are both forward, the hull 1 can move forward efficiently.

FIG. 8 is a rear view of the embodiment shown in FIGS. 4, 5, and 6 and is a view of the hull 11 seen from the rear. 9 (A), 9 (B), 9 (C), and 9 (D),
FIG. 9 is a partial cross-sectional view showing cross sections cc ′, dd ′, ee ′, and ff ′ of FIG. 8 respectively. In FIG. 8, a rider (not shown) standing on the hull 11 has a center of gravity on his left foot, and the hull 11 is swinging counterclockwise. At this time, the force of the water acting on the fin 16 becomes as shown in FIGS. 9 (A) to 9 (D). That is, the fin 16 tensioned by the spring 15 is twisted by the force of water, and the twist angle increases as it approaches the tip. Further, the movement of the fin 16 due to the rocking of the hull 11 is larger toward the tip, so that the relative speed with water is also large. Therefore, as shown in FIGS. 9 (A) and 9 (B), the water flow W11 is smoothly bent to the rear of the hull 11 by the appropriately twisted fin 16 like W12, and the reaction force causes the hull to hull.
11 can move forward.

When the hull 1 starts to move forward, the water flow W11 becomes W13 and the fin 16
Can be bent in the direction of W14. In this case, the hull 1
Since the angle of the flow with respect to the fin 16 is smaller than that in the state where 1 is stopped, it is preferable that the twist angle of the fin 16 is smaller than that in the stopped state because the angle of W14 is directed rearward. The tension can automatically change to the angle shown by the dotted line.

The fin 16 on the right side shown in FIG. 8 is shown in FIG. 9 (C),
As shown in FIG. 9D, it is theoretically the same as the case shown in FIGS. 9A and 9B only with the upside down. Therefore, the hull 11 can be continuously advanced by swaying the hull 11 left and right as the rider moves his / her weight left and right.

Further, in the state shown in FIG. 8, the rudder 18 leans to the left due to its own weight, so if the posture is maintained as it is, the hull 11 turns to the left. On the contrary, if you keep the posture while keeping the hull 11 tilted to the right, you can turn to the right. Therefore, the steering device and mechanism on board the ship can be omitted.

Here, the fin 16 projects to the side of the hull 11, so
Shake 11 a little and the tip of fin 16 moves a lot.
Due to the twisting movement of the above, even if some stroke is used, it is possible to move forward effectively with the remaining stroke length.

The fin 37 configured as shown in FIG. 7 also operates, and the effect is the fourth.
It is the same as the embodiment shown in FIGS. 6 to 6, but has the advantages that the structure is simple, the surface is smooth, and the water resistance is small.

(G) Effects of the Invention As is clear from the above description, the water propulsion device of the present invention has a structure in which the rider can efficiently move forward and turn only by moving the body weight left and right and swinging the hull left and right. However, it is easy to maneuver, and it consumes little physical strength, so it is also suitable for use as a sport that runs freely on the water, and its effect is extremely remarkable.

[Brief description of drawings]

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention, and FIG.
FIG. 4 is a partial plan view thereof, FIG. 3 is a partial side view thereof, FIG. 4 is a perspective view showing the structure of another embodiment of the present invention, FIG. 5 is a partial plan view thereof, and FIG. 6 is a partial side view thereof. FIG. 8 is a rear view thereof, FIG. 9 is a partial sectional view showing the operation of the present invention, and FIG.
The drawing is a partial plan view showing the structure of another embodiment of the present invention. 1, 11: Hull, 2, 16, 37: Fin, 12, 32: Arm, 13, 33: Chord member, 15: Spring, 17: Rope, 18: Rudder, 19: Ring, 20: Hole, 23: Shaft, 31: Tongue, 34: Tube, 35: Bolt, 36, 3
8,39: Hole.

Claims (3)

[Claims] 1. A ship provided with wing-like fins protruding from water into the water, wherein two fins are provided in the water in an inverted V shape, each fin being a rod-shaped arm and a hull. It has a chord member facing rearward, a triangular flexible fin and a spring, and is attached to the tip of the chord member via a spring at one apex of the fin, and the opposite side is attached to the arm. A characteristic rocking propulsion ship. 2. In a ship provided with wing-shaped fins projecting into water from the hull, the fins have a cross section with a rounded leading edge and a sharp trailing edge in the traveling direction, and the fins are rigid and underwater. It has two plate-shaped rudder, which are provided in the shape of an inverted V-shape, the position of which is set in front of the center of gravity of the entire body, and the stern of which is provided rearward by a rotating shaft whose upper portion is inclined rearward in the traveling direction. A characteristic rocking propulsion ship. 3. The swing propulsion ship according to claim 1, further comprising a plate-shaped rudder provided at the stern toward the rear by a rotary shaft whose upper portion is inclined rearward in the traveling direction.