JP2000219195A - Propulsion board by fin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To advance a hull by horizontally moving a fin erected in the vertical direction. SOLUTION: Two horizontal moving rods 44 are horizontally movable by taking fulcrum axes 45 as fulcrums, and they are always pulled inward by a spring 46. Fins 50 are attached to the tips of stern sides of the horizontal moving rods 44 so as to be moved with the movement of the horizontal rods 44 and so as to be freely and horizontally turned at specified angles. On the front ends on the bow sides of the horizontal rods 44, ropes 55 are connected to a pedal 58 through pulleys. When the pedal 58 is pushed forward by an occupant, the ropes are pulled, two horizontal moving rods 44 are moved so as to be extended to the stern side, and the fins are also moved. In this process, reaction from the water acts as propulsion force of the hull 41. When force of a leg is relaxed, the pedal 58 is drawn back, the horizontal moving rods 44 on the stern side are closed, and propulsion force is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion boat using fins which move forward by moving the fins.

[0002]

2. Description of the Related Art Conventionally, a stepping boat that moves forward by stepping on a foot, for example, is known.

[0003]

However, this kind of footboat is one in which a propeller or a water wheel is turned by a passenger to step forward and moves forward.

[0004] It is an object of the present invention to provide a finned propulsion boat that incorporates a sporting element and can improve the forward efficiency by, for example, the occupant's leg strength and skill.

[0005]

In order to achieve the above object, a fin-based propulsion boat according to the present invention has two horizontal moving rods which open and close symmetrically in the horizontal direction attached to a hull, and each of the horizontal moving rods has At the rear end, fins whose free ends are directed rearward are attached so that their surfaces face the vertical direction, and by moving the horizontal moving rod, the fins are moved symmetrically in the horizontal direction in water. Features.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 is a plan view of the embodiment, and FIG. 2 is a side view. The hull 41 is of a catamaran type, and the boats 41a, 21b
When the center block 42 is bridged between the centers, the small boats 41a and 21b are connected to each other, and mainly necessary mechanical components are arranged on the center block 42.

A chair 43 is arranged on the center block 42, and two horizontal moving rods 44 on both sides of the chair 43 in the longitudinal direction of the hull 41 are provided on two fulcrum shafts provided on the center block 42. The horizontal moving rods 44 are symmetrically movable in the horizontal direction with each of the fulcrum 45 as a fulcrum. The horizontal moving rods 44 are always pulled inward by a spring 46 on the stern side of the fulcrum shaft 45. Two auxiliary rods 47 are mounted on these horizontal moving rods 44 in a direction substantially perpendicular to the longitudinal direction of the hull 41 with a fulcrum shaft 45 in common. One end of a parallel rod 48 is rotatably mounted in parallel with the rod 44.

The other end of the parallel rod 48 and the horizontal moving rod 44
An auxiliary rod 49 is rotatably wrapped around the tip of the stern side of the horizontal rod 44, the auxiliary rod 47, the parallel rod 48, and the auxiliary rod 4.
9 form a parallelogram. On the horizontal moving rod 44 side of the auxiliary rod 49, fins 50 located in the water below are mounted via fin mounting parts 51, and the fins 50 are provided on the fin mounting part 51 in the vertical direction. It is rotatable around. Fin 50
Is flexible, and is mounted with its plane oriented vertically, and the rotation angle in the horizontal plane is within a predetermined angle range of, for example, about 60 degrees.
Regulated by:

The fins 50 are made of synthetic resin, rubber or the like and have flexibility. It is preferable that the fins 50 be thicker on the fin mounting portion 51 side and thinner toward the rear to adjust the degree of bending.

A moving pulley 5 is provided at the front end of the horizontal moving rod 44 on the bow side.
4 are attached, and the moving pulley 54 has a rope 55
And the rope 55 is connected to a pedal 58 in a kick unit 57 disposed in front of the chair 43 via a group of pulleys 56 fixed to the center block 42, and the pedal 58 is connected to a slide rail 59. It is free to move along. The other end of the rope 55 is a group of pulleys 56,
It is fixed to the center block 42 via a moving pulley 54.

Pins 60 project upward from the support shafts 45 of the two auxiliary rods 47, respectively.
The pins 60 are respectively fitted into two long grooves 63 of the changing needle rod 62 which are arranged so as to connect the auxiliary rods 47 and are rotatable by a fulcrum shaft 60 provided on the center block 42. The hull 4 is attached to one end of the changing needle rod 62.
1 is rotatably attached to the stylus connecting rod 64 disposed in the longitudinal direction. The stylus connecting rod 64 is positioned diagonally forward of the chair 43, a grip 65 is provided on the upper part thereof, and the lower end is a center block. It is rotatably connected to an intermediate portion of a needle changing operation rod 66 which is attached to and is tiltable.

Before the operation, as shown in FIG. 1, the two horizontal moving rods 44 are configured so that the stern side thereof is centered on the fulcrum shaft 45 by the force of the spring 46 and the bow side is expanded, and the rope 55 Accordingly, the pedal 58 is drawn toward the occupant P sitting on the chair 43. Then, when the rider pushes the pedal 58 forward by the leg force, the pedal 58 is pushed forward along the slide rail 59 as shown in FIG. 3, the rope 55 is pulled, and the pulley group 56 and the moving pulley 54 are pulled. The two horizontal moving rods 44 move so that the bow side narrows and the stern side widens.

In response, the auxiliary rod 49 moves outward, and the fin 50 moves together. In this process, the fins 50 are pushed back inward around the fin shaft 52 due to the resistance of the water. At this time, a force f acts on the two fins 50 in a direction perpendicular to the surface of the fins 50 by a reaction from water. .
This force f can be decomposed into a vector of a component force f1 in the longitudinal direction of the hull 41 and a component force f2 in a direction orthogonal thereto, and the component force f1 acts as a propulsive force of the hull 41. At this time,
Since the two fins 50 move symmetrically with respect to the hull 41, the deflection of the hull 41 is extremely small.

When the force of the foot is released, the rope 55 is pulled by the spring 46, the pedal 58 is pulled back, the stern side of the horizontal moving rod 44 is narrowed again, and the fin 50 returns to the position shown in FIG. Become. In this case, pedal 5
The return of 8 may be performed not by the spring 46 but by leg force using a crank mechanism or the like. Also in this returning process, a propulsive force is generated in the fin 50 by the component force f ′ in the forward direction. Therefore, a forward propulsive force of the hull 41 is obtained by the forward vector component of the component force f ′.

FIG. 5 is an explanatory view of changing the direction of the hull 41 when changing the direction of the hull.
, And the steering is performed by tilting the needle changing operation lever 66 forward or backward. For example, when the changing needle operating rod 66 is pushed forward, the changing needle connecting rod 64 is pulled forward, and the changing needle rod 62 is rotated clockwise about the fulcrum shaft 61, whereby the changing needle rod 6 is rotated.
The position of the pin 60 of the auxiliary rod 47 fitted in each of the two long grooves 63 moves, the auxiliary rod 47 changes its angle, and the parallel rod 48 is pulled or pushed by the auxiliary rod 47 to change the angle of the auxiliary rod 49. Will change. The two auxiliary rods 47 and the two auxiliary rods 49 always maintain a parallel relationship regardless of the size of the changing needle, and the two fins 50 can be directed in the same direction.

As described above, when the pedal 58 is moved in a state where the direction of the fin 50 is changed, the propulsive force of the fin 50 can be applied to the direction via the horizontal moving rod 44. In the embodiment, the fin 50 has flexibility and the angle can be changed within a predetermined angle range. However, the angle may be fixed as long as the fin 50 has flexibility.

If the handle 66 is used as a handle which is held by both hands and is used instead of a handrail, the occupant's body can be stabilized. Further, in the embodiment, the horizontal moving rod 44 is used.
Has been described as being moved by leg force, but may be moved by mechanical means such as a motor.

[0018]

As described above, in the propulsion boat using fins according to the present invention, a forward propulsion force is generated by the fins by horizontally moving the fins arranged vertically in the water.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment.

FIG. 2 is a side view.

FIG. 3 is a diagram illustrating the operation of a fin.

FIG. 4 is a diagram illustrating the operation of a fin.

FIG. 5 is an explanatory diagram of the operation of the changing needle.

[Explanation of symbols]

 41 Hull 42 Center block 43 Chair 44 Left and right moving rod 46 Spring 47, 49 Auxiliary rod 48 Parallel rod 50 Fin 55 Rope 57 Kick unit 58 Pedal 62 Changing needle rod 66 Changing needle operation rod

Claims (5)

[Claims] 1. A fin having two horizontal moving rods which open and close symmetrically in the horizontal direction attached to a hull, and a fin having a free end directed rearward at a rear end of each of the horizontal moving rods, the surface of which is oriented vertically. A fin-propelled boat, wherein the fins are horizontally symmetrically moved in water by moving the horizontal moving rod. 2. The propulsion boat according to claim 1, wherein the fin has flexibility, and a front portion of the fin is directly or indirectly variable in angle to a rear end of the horizontal moving rod. 3. The fin-propelled boat according to claim 1, wherein the fin-supporting member is turned and steered by a changing needle rod. 4. The propulsion boat according to claim 1, wherein the horizontal moving rod is moved by depressing a pedal by leg force. 5. The finned propulsion boat according to claim 4, wherein the two horizontal moving rods are opened or closed by pushing the pedal and closed or opened by a spring force.