JP2019189197A - Water surface propulsion device - Google Patents

Abstract

To provide a water surface propulsion device which is light weight, easy to carry, and with high operability.SOLUTION: A water surface propulsion device to be attached to a floating body is composed with: a slider composed to be attached to the floating body; a driving shaft of a pillar body composed to penetrate inside the slider in the vertical direction to a bottom surface of the floating body; a pedal connected to a top end unit pf the driving shaft; a connection unit connected to a bottom end unit of the driving shaft; a fin connected through a revolving shaft of the connection unit; the fin composed to be capable of rotation with a shaft of the connection unit as a center; and a stopper provided restricting the rotational angle of the fin in the upward direction to be relatively smaller than the rotational angle in the downward direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water propulsion device for a vehicle for outdoor sports, and more particularly to a water propulsion device for use in a floating body such as a surfboard.

  Conventionally, paddles have been used to propel and operate marine sports vehicles such as kayaks and paddle boards.

  However, paddles are difficult to handle for beginners, and it takes a long time to learn how to operate. In addition, since the paddle is used in the hand, both hands are blocked. In addition, fishing and photography may be carried out on a marine sports vehicle, but each time it is moved, the tool and paddle must be changed, which makes it inconvenient to operate the vehicle.

  Further, a vehicle provided with a device for propelling with a leg as shown in Patent Document 1 or Patent Document 2 is disclosed. However, since the vehicles as disclosed in Patent Documents 1 and 2 are steered by hand, the inconvenience of operability that the hand is blocked cannot be solved. Further, since the apparatus is large and heavy, there has been a problem that it is not easy to carry.

JP 2014-231351 A JP-A-11-291984

Conventionally, boats that make use of the power of the foot are known.
However, these drive units are large and heavy, and it is difficult to attach them to a light kayak or paddle board.

An object of the present invention is to provide a water-borne propulsion device that is lightweight, has high operability, is easy to carry and detach, and can obtain a constant propulsion force with a simple operation.

  To achieve the above object, the water propulsion device according to the present invention can be attached to a floating body such as a paddle boat by simply making a small hole, and is held by the slider and held by the slider. A drive shaft that is movable in a direction perpendicular to the bottom surface of the floating body and that is further rotatable, a pedal connected to one end of the drive shaft, a connection portion connected to the other end of the drive shaft, and the connection The fin is configured to be connected to a part, and the fin is mounted substantially parallel to the bottom surface of the floating body and is configured to be rotatable within a predetermined angle range in the vertical direction.

  The water propulsion device of the present invention can obtain a constant propulsive force only by moving the foot up and down, and can turn by moving the foot up and down by changing the direction of the foot, so both hands can be used freely and convenience Will improve. For example, you can move with your feet comfortably in any direction while fishing, taking pictures, or drinking a drink.

Even beginners can use it easily because it can be operated with just a simple foot movement without using a paddle.
Furthermore, since the traveling direction can be determined by the propulsion device itself without using the rudder, the vehicle can turn even from a stationary state.

1 shows a water moving device in which a water propulsion device is attached to a floating body in a first embodiment of the present invention. The enlarged view of the water propulsion apparatus of FIG. 1 is shown. The movement when the fin of the water propulsion device according to the first embodiment of the present invention descends is shown. The movement when the fin of the water propulsion device according to the first embodiment of the present invention rises is shown. The water propulsion apparatus of the 2nd Example of this invention is shown. The water moving apparatus of the 3rd Example of this invention is shown.

  FIG. 1 shows an overall configuration in which a water propulsion device 20 according to a first embodiment of the present invention is attached to a floating body 1 such as a surfboard. FIG. 2 shows an enlarged view of the water propulsion device 20 according to the first embodiment of the present invention.

  The water propulsion device 20 according to the present embodiment includes a slider 2, a pedal 3, a drive shaft 4, a connection portion 5, a stopper 5 a, a stopper 5 b, a fin 6, and a belt 7, and is fixed to the floating body 1 through the slider 2. Yes.

  The water propulsion device 20 is attached to the floating body 1 having sufficient buoyancy and stability for a person such as a paddle board to stand upright on the water. The water propulsion apparatus of the present embodiment can be attached by providing a hole at an arbitrary position of the floating body 1. The water propulsion device of the present invention may be attached to the center of gravity of the floating body 1.

  The water propulsion device 20 moves the pedal 6 up and down with a foot to displace the fin 6 and generate a propulsive force. The pedal 3 is provided with a belt 7 that covers the instep of the foot and has a sandal-like mechanism. By inserting the foot into the pedal 3, the drive shaft 4 can be moved up and down. The principle of propulsion of the water propulsion device 20 according to the first embodiment will be described with reference to FIGS. 3 and 4.

  Since the pedal 3 has a sandal-like mechanism as described above, the toe of the operator's foot is fixed to the pedal 3, and when the direction of the toe of the foot is changed, the direction of the pedal 3 changes, and the drive shaft 4 Is rotated, and turning is enabled by changing the direction of the fin 6 in the traveling direction with respect to the floating body 1. The slider 2 rotates from the upper surface of the floating body 1 to the yaw axis. Thereby, the angle with respect to the floating body 1 of the pedal 3, the drive shaft 4, the connection part 5, and the fin 6 demonstrated later can be changed, and turning is enabled by changing the direction in which a thrust is generated.

  The floating body 1 has sufficient buoyancy and stability that allows a person to stand upright. The floating body 1 is provided with a hole for receiving a slider 2 described later.

  The slider 2 is a mechanism that holds the drive shaft 4. The slider 2 has a cylindrical structure and is provided with a hole that matches the shape of the drive shaft 4. Further, the slider 2 has hooks on the upper surface and the lower surface of the slider 2 to prevent the slider 2 from coming off the floating body 1 so that the slider 2 does not come off the vertical direction from the floating body 1.

The slider 2 is divided into two parts near the center of the upper member and the lower member (both not shown) before being attached to the floating body 1, and can be connected by a fixing tool such as a bolt. The water propulsion device 20 is fixed to the floating body 1 by attaching the floating body 1 so as to be sandwiched between the upper member and the lower member from above and below.
Further, in order to reduce the friction with the drive shaft 4, the slider 2 can be made of a material such as Duracon resin.

  The propulsion direction of the floating body 1 depends on the direction of the fin 6. When the floating body 1 is to be turned, the drive shaft 4 is turned by turning the pedal 3, and the fin 6 connected to the drive shaft 4 is also turned. Since the slider 2 has a cylindrical structure, the water propulsion device 20 can be easily turned with respect to the floating body 1.

  The pedal 3 transmits power from the foot to the drive shaft 4. The pedal 3 is provided with a belt 7 that covers the instep of the foot, whereby the pedal 3 can be lifted by a force for lifting the foot. The user stands behind the pedal 3 and raises and lowers the pedal 3 with his / her foot.

  The fins 6 are installed in the connecting portion 5 so that the floating body 1 is propelled in the toe direction of the foot entering the pedal 3.

  The drive shaft 4 is held by the slider 2 and moves up and down. The drive shaft 4 has a rod shape.

  According to the first embodiment, the drive shaft 4 is a cylindrical body, but is not limited thereto.

The connecting portion 5 is a component that connects the drive shaft 4 and the fin 6. A shaft for rotating the fin 6 is attached to the connecting portion 5 in a direction perpendicular to the side surface of the drive shaft 4, and the fin 6 is configured to rotate about the shaft.
In addition, you may be comprised so that a drive shaft can be removed from the connection part 5 so that it may become convenient at the time of carrying.

Stoppers 5a and 5b are provided on the connecting portion 5 so that the rotational angle when the fin 6 is lowered is larger than the rotational angle when the fin 6 is lowered. By these stoppers 5a and 5b, the rotation angle of the fin 6 is limited, and a propulsive force can be generated. As shown in FIGS. 3 and 4, the propulsive force of the water propulsion device 20 depends on the angle when the fin 6 is raised and lowered. For example, in order to obtain a large driving force, it is preferable that the angle when the fin 6 is raised and lowered is small. On the other hand, the force of pushing with a foot is generally larger than the force of lifting. Therefore, when the fin 6 is lowered by pushing the pedal with the foot, it is preferable that the upward angle θ1 of the fin 6 is small. On the other hand, if the downward angle of the fin 6 is limited to a small value when lifting the pedal with the foot, a large force is required to lift the pedal with the foot instead of obtaining a large propulsive force. I'm tired. Therefore, when lifting the pedal with the foot, instead of sacrificing the propulsive force, the downward angle θ2 of the fin is larger than the upward angle θ1 of the fin 6 so that the pedal can be lifted with a small force. Constitute.

  As described above, by providing such an angle difference that the downward angle θ2 of the fin 6 is relatively smaller than the upward angle θ1, the force for lifting the foot is reduced, and the fin 6 can be lifted lightly. For example, a stopper is provided so that the upward angle θ1 of the fin 6 is limited to about 4 degrees to about 14 degrees and the downward angle θ2 is limited to about 17 degrees to about 27 degrees.

  With reference to FIG. 3 and FIG. 4, the principle which the floating body 1 with which the water propulsion apparatus was attached propels in a desired advancing direction is demonstrated.

  As shown in FIG. 3, when the pedal 3 is depressed with one foot, the drive shaft 4 moves downward via the pedal 3. As the drive shaft 4 moves downward, the fin 6 receives water resistance, and the fin 6 moves downward with respect to the axial direction. However, the stopper 5a restricts the movement of the fin 6 so that the stopper 5a descends in a fixed state at a predetermined angle θ1. At this time, a force vector F acts on 6 in a direction orthogonal to the surface of the fin 6 due to a reaction from water. This force vector F can be decomposed into a horizontal vector F1 and an upward vector F2. Here, the horizontal vector F1 becomes the propulsive force of the propulsion device 20, and the floating body 1 can be advanced.

  As shown in FIG. 4, when the pedal 3 is lifted with one foot, the drive shaft 4 moves upward via the pedal 3. In accordance with the upward movement of the drive shaft 4, the fin 6 receives the resistance of water, and the fin 6 moves upward with respect to the axial direction. Here, the stopper 5b restricts the movement of the fin 6 so that the stopper 5b rises while being fixed at a predetermined angle θ2. At this time, a force vector F ′ acts on the fin 6 in a direction perpendicular to the surface of the fin 6 due to a reaction from water. This force vector F 'can be decomposed into a horizontal vector F1' and a downward vector F2 '. Here, the horizontal vector F <b> 1 ′ is the propulsive force of the propulsion device 20, and the floating body 1 can be advanced.

  In general, the force of pushing the pedal with the foot is greater than the force of lifting the pedal with the foot. In view of this point, in the present invention, when the pedal is pressed with the foot, that is, when the fin 6 descends, the rotation angle θ1 of the fin 6 is limited to be small, and the force with which the foot is pushed (large) Utilizing this, a large floating body propulsive force (vector F1) is obtained. On the other hand, when the pedal is lifted with the foot, that is, the rotation angle θ2 of the fin 6 when the fin 6 rises is limited, the force that makes it easy to pull up the drive shaft 4 instead of reducing the propulsive force of the floating body ( Vector F2 ′) is obtained. By operating the fin 6 up and down based on such a principle, water is always pushed backward to generate a propulsive force.

  In Patent Document 1, it depends on the inclination of the seesaw, the stroke of the fin 6 is short, and sufficient thrust is not generated. In the present invention, a sufficient stroke length is secured by using a mechanism that slides up and down. Further, in the present invention, it is possible to turn by changing the direction of the propulsive force.

  A second embodiment is shown in FIG. In FIG. 5, a spring 9 is inserted between the pedal 3 and the slider 2 around the drive shaft 4, and the spring 9 as an elastic member is provided to lift the pedal 3. This not only reduces the load when lifting the pedal 3, but the pedal 3 is lifted when the foot is released from the pedal 3, and the fin 6 is fixed to the bottom surface of the floating body 1. Therefore, when entering the water, when landing The fin 6 can reduce the influence of the obstacle under the water surface.

A third embodiment is shown in FIG. In FIG. 6, a handle 10 is installed on the floating body 1, and the user grasps the handle 10 with his hand on the floating body 1 to support the body, so that the user can easily balance the pedal. . In addition, you can support your body even when shaken by the waves, so you can enjoy more safely.

The following aspects can be understood from at least one of the embodiments described above.
One aspect of the water propulsion apparatus is such that the water propulsion apparatus for mounting on the floating body passes through the inside of the slider in a direction perpendicular to or substantially perpendicular to the bottom surface of the floating body, and a slider attached to the floating body for floating in water. A columnar drive shaft provided; a pedal provided at an upper end portion of the drive shaft; a connection portion provided at a lower portion of the drive shaft; a fin that is rotatably attached via a rotation shaft provided in the connection portion; The connecting portion is provided with a stopper for limiting the range in which the fins can be rotated, and the drive shaft can move up and down with respect to the slider, and the horizontal direction of the drive shaft with respect to the slider The pedal is pivotably attached, and a belt is provided on the pedal as a fixing member for fixing the operator's foot, so that the operator can change the direction of the foot in the horizontal direction. Te, along with being changed horizontal orientation of the drive shaft the pedal, the horizontal orientation of the fin is changed. According to this aspect, since the drive shaft and the connecting portion are moved up and down by the pedal for the operator to step on, the fins move up and down and the connecting portion rotates when the connecting portion is displaced up and down. The fin tilts around the axis to the angle limited by the stopper in water. Thereby, when the fin moves up or down, it becomes possible to generate a horizontal driving force. In addition, since the horizontal direction of the drive shaft can be changed, the direction of the fins can be changed, so that a propulsive force can be generated in a desired direction, and the floating body can be swung, moved forward and backward become.

  As one aspect of the above-described water propulsion apparatus, it is preferable that the fin stopper is further limited so that the upward rotation angle is smaller than the downward rotation angle. According to this configuration, since the resistance of water when the pedal is moved up can be reduced, the force for raising the pedal can be reduced. This makes it easier for the operator to operate.

  As one aspect of the above-described water propulsion device, it is preferable to provide a pedal urging elastic member for urging the pedal upward between the pedal and the slider. According to this aspect, the pedal can be moved upward with a relatively small force. This makes it easier for the operator to operate.

  In the above-described water moving device to which one aspect of the water propulsion device is applied, it is preferable that a handle for the operator to grip is provided on the upper side of the floating body. According to this aspect, since the operator can grasp the handrail when raising and lowering the pedal, the body can be stabilized during the operation. In addition, it is possible to prevent the operator from falling off even if the water movement device is shaken by wind or waves during the operation.

DESCRIPTION OF SYMBOLS 1 Floating body 2 Slider 3 Pedal 4 Drive shaft 5 Connection part 5a Stopper 5b Stopper 6 Fin 7 Belt 9 Spring 10 Handle 10

Claims (4)

  A water propulsion device attached to a floating body and capable of moving on water by displacing a fin attached to a drive shaft connected to the pedal by moving the pedal up and down with a foot under the water surface, The surface of the water is characterized in that the direction of the driving shaft and the fin changes direction by changing the direction of the pedal in a direction rotating around the axial direction of the driving shaft, and the direction of propulsive force due to the displacement of the fin changes. Propulsion device.   The fin is provided so as to be rotatable around a rotation shaft provided below the water propulsion device, and below the drive shaft, the fin is below the water surface when the pedal is moved up and down. The water propulsion device according to claim 1, wherein a stopper that restricts a range of a rotation angle when displacing is provided, and a range of a fin rotation angle by the stopper is different in the vertical direction.   The water propulsion apparatus according to claim 1, wherein an elastic member that biases the pedal in a direction in which the pedal is lifted is provided between a member that attaches the water propulsion apparatus to the floating body and the pedal. The water moving device according to any one of claims 1 to 3, wherein the floating body includes a handle for the operator to hold by hand.

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