JP2620080B2 - Small watercraft - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention is provided with a sail that can swing at least in the front-rear direction, puts the sole on the upper surface of a hull, and runs while holding the boom by hand. It is related to small watercraft.

(Background of the Invention) There is a small watercraft such as a so-called wind surfing device in which one mast is attached to a long board in a front and rear manner by a universal joint so as to be swingable in front and rear and left and right. This conventional one has poor stability due to the small size and narrow width of the board, especially when the sail receives a weak force under light wind, so the propulsion of the board also weakens, and the tagger board (center board) and skeg ( There is a problem that the action of the fin is weakened and the stability is further deteriorated. For this reason, it was difficult for beginners to run while balancing the sale and the board.

Further, the conventional board has a problem that the resistance to water increases due to a large water contact area, and the speed tends to decrease. Particularly, the speed under a slight wind is extremely low, and the stability is further deteriorated.

(Object of the Invention) The present invention has been made in view of such circumstances,
An object of the present invention is to provide a small surface sailing implement that can run stably even in a light wind, has low water resistance, and can be easily used by a beginner.

(Constitution of the Invention) According to the present invention, an object is to provide a hull that is long before and after a center of curvature of a bottom surface formed of a substantially circular curved surface is located within its closed cross-sectional shape and has a footrest surface on an upper surface, A mast mounted on the upper surface of the hull so as to swing at least in the front-rear direction, a boom having a front end pivotally and swingably mounted in the middle of the mast, and a sail stretched between the mast and the boom An outrigger below the boom, protruding from the hull to at least one of the left and right sides and imparting a rotation return behavior upward from a substantially horizontal position, and allowing the outrigger to rotate downward and upward A ratchet mechanism that restricts rotation of the outrigger and appropriately fixes the outrigger to a rotation position;
A pedal operable with a foot that releases the ratchet mechanism to rotate and return the outrigger upward, and a sponson attached to a rotating end of the outrigger, and stands on the footrest surface and lifts the boom. The present invention is achieved by a small surface sailing implement characterized in that the fixed angle of the outrigger can be adjusted with a foot while being held.

(Embodiment) FIG. 1 is a perspective view showing a running state of an embodiment of the present invention,
2 is a side view, FIG. 3 is a plan view, FIG. 4 is a front view showing the movable range of the sponsons, FIGS. 5, 6, and 7 are cross-sectional views taken along line VV in FIG. VI section view, VI
FIG. 8 is a sectional view taken along the line I-VII, and FIG. 8 is a perspective view showing a stored state.

In these figures, reference numeral 10 denotes a hull, and this hull 10 is made of a sheet of rubber or the like in a shape that is substantially circular in cross section and long in the front-rear direction. As a result, the center of the radius of curvature of the hull is located near the center of the cross-sectional shape. The inside of the hull 10 is divided into three air chambers 16, 18, and 20 by two partition walls 12 and 14, and air can be taken in and out independently of each other. The front of Hull 10 is gradually tapering, while Hull 10
The rear end is a nearly vertical transom 22. Fins 24 are fixed to the transom 22. Hull 10
The upper part near the center of the has a non-slip finish, making it difficult for riders to slip when putting their feet on.

A long through hole 26 is formed in the center air chamber 18 of the hull 10 before and after it penetrates vertically (see FIG. 6).

Reference numeral 30 denotes a mast base, which is formed by integrally forming a square tube part 32 inserted into the through hole 26 from above and a base part 34 extending in the front-rear direction on the upper surface of the hull 10. It is.
The base 30 is made of, for example, aluminum casting. Square tube part 32
Is inserted into the through hole 26 of the hull 10 from above, and is sandwiched between partition walls on both sides of the through hole 26 as shown in FIG.
That is, the air in the air chamber 18 presses the partition wall of the through hole 26 against the square tube portion 32. As a result, the base 30
Is fixed so as to be in close contact with the upper surface of the.

A dagger board 36 is inserted into the square tube part 32 of the base 30 from above. A batten pocket into which the battens 38 is formed is formed on the upper surface of the front portion of the hull 10, and the rear end of the battens 38 inserted therein is fixed to the front end of the base 34 of the base 30 with a pin.

Reference numeral 40 denotes a mast, and the lower end of the mast 40 is attached to the base 34 so as to be swingable in the front-rear direction. This mast 40
The front end of the boom 42 is rotatably and swingably mounted in the middle of. That is, the boom 42 is formed by connecting the front ends of two arcuate bars with a boom jaw 44 and the rear end with a boom end 46, and the inside of the jaw 44 is attached to the mast 40. The mast 40 has a front edge of a substantially triangular sail 48 attached to the mast 40.
Connected to 46.

50, 50 is a pair of sponsons (floats) on the left and right.
These sponsons 50, 50 are attached to the ends of outriggers 52, 52 held at the rear of the base. As shown in FIG. 7, the bases of the outriggers 52 and 52 are meshed with gears, and are rotatable symmetrically upward and downward by about 30 ° from a horizontal position (FIG. 4). While the outriggers 52 and 52 are provided with an upward return behavior by a torsion spring (not shown),
Within this range, it can be fixed and released by position adjusting means operated by foot at an appropriate position. The position adjusting means includes a ratchet mechanism (not shown) housed in a gear chamber 54 at the base of the outriggers 52, 52, and an outrigger 5.
It is formed by pedals 56, 56 provided in the middle of 2, 52. By depressing the pedals 56, 56, the ratchet mechanism is released, and the outriggers 52, 52 can be returned upward by the torsion spring. Therefore, when the outriggers 52, 52 are stepped down with feet, the outriggers 5
2, 52 can be fixed to the appropriate position, and the ratchet mechanism is released by stepping on the pedals 56, 56 to outrigger
52, 52 can be turned upward. Gear chamber 54
It is preferable that the bases of the outriggers 52, 52 be covered with a rubber cover or the like as appropriate to protect the rider's feet.

The sponges 50, 50 are pin-coupled to the outriggers 52, 52, and the outriggers 52, 52 themselves are also pin-coupled to the base portion 34. During traveling, the outriggers 52, 52 and the sponson 50, 50 are positioned as shown in FIGS. Fixed to On the other hand, at the time of storage, the outriggers 52
50, 50 can be adhered to the side of the hull 10 (No. 8
Figure). At this time, if the air in the air chamber 16 at the front of the hull 10 is evacuated and turned back as shown in FIG. 8A and the tip of the hull is locked to the transom 22 with a rope or the like, the transportation becomes easier.

Next, how to use this embodiment will be described. The sailing gear is first stored as shown in FIG. 8B, and is carried on a car or the like to the destination. Release the end of the hull 10 from the transom 22 and inflate the air chamber 16 with air. Further, the outriggers 52, 52 are rotated and fixed at a position perpendicular to the hull 10, while the sponges 50, 50 are fixed at a position parallel to the hull 10. After inserting the batten 38 into the batten pocket on the front upper surface of the hull 10, the rear end of the batten 38 is fixed to the front end of the base 34. The lower end of the mast 40 to which the boom 42 and the sail 48 are attached in advance is connected to the base 34 with a pin. A fin 24 is also attached to the transom 22.

After the assembly is thus assembled, the hull 10 is floated on the water surface, and then the dagger board 36 is inserted into the square tube portion 32 from above, thereby completing the travel preparation.

The rider places both feet on the upper surface of the hull 10 as shown by the imaginary line in FIG. When the hull 10 receives wind from the lateral direction, the hull 10 moves forward by utilizing the lift or drag generated on the sail 48 by the wind.
At this time, the wind center CE of the sail 48 can be moved back and forth by tilting the mast 40 back and forth. The traveling direction is controlled by controlling the relative positions of the wind center CE and the underwater side surface resistance center CLR mainly generated by the dagger board 36 in the front-rear direction.

When the attitude of the hull 10 is stabilized, the sponsons 50, 50 are pulled up from the surface of the water to reduce the resistance of the water, so that it is possible to run at a higher speed. Also, under a slight wind, the sponsons 50, 50 come into contact with the water surface, and the stability of the hull 10 is good.

It is necessary to tilt the mast 40 to the left and right in order to achieve balance, but in this case, it is sufficient to raise the sponson to an appropriate position and tilt the mast 40 to the left and right together with the hull 10 itself. For example, when running in the leeward direction after receiving the wind, the mast 40 and the hull 10 are tilted to the left or right to make the sail 48 almost perpendicular to the wind, and the rider stands upright behind the mast 40 to balance. Will be. In addition, at the time of this running, if the dagger board 36 is pulled out of the water, the resistance is further reduced as in the case of a yacht,
It is desirable that the dagger board 36 can be fixed at an arbitrary position in the square tube part 32.

In the above embodiment, the mast 40 can swing only forward and backward with respect to the hull, and swings integrally with the hull 10 when swinging left and right. In this case, since the hull 10 has a circular cross section, its buoyancy and restoring force do not change significantly even if the hull 10 rotates left and right. For this reason, stable running is always possible.

The present invention also includes a mast that can swing not only forward and backward but also left and right with respect to the hull. In this case, the hull can be swung right and left without rotating the mast only with respect to the water surface.Therefore, even if both sponsons cannot be lifted up together, one sponson is fixed and only the other sponsons are raised. It may be possible. For example, if one of the pair of left and right sponsons is arranged so as to always be away from the water surface, and if the vehicle is running away from the water surface together with both sponsons during stable running, the resistance is reduced. Also, a sponson may be provided only on one of the left and right sides.

The dagger board 36 may be provided with a trim tab 60 for controlling the attitude of the hull 10 as shown in FIG. For example, the rotation of the hull 10 may be controlled by transmitting the rotation of the grip 62 rotatably provided on the boom 42 to the trim tab 60 by a wire or the like and rotating the trim tab 60 right and left. . In this way, when the mast can be swung only back and forth as in the above-described embodiment, the angle at which the mast 40 is tilted left and right can be controlled by the grip 62. Also, if the mast is attached to the hull so that it can swing to the left and right, installing such a posture control trim tab makes it easy to control the hull to be rotated by this trim tab to separate the sponson from the water surface. Will be able to

The hull of the present invention includes not only a hull having a circular cross section, but also a hull having a bottom formed with a substantially circular curved surface and having a flat portion at the top.

(Effect of the Invention) As described above, the present invention provides a hull having a substantially circular bottom surface, a center of curvature radius within the closed cross-sectional shape of the hull, an upper surface thereof serving as a footrest surface, and a spongson formed by an outrigger. Because it is attached, the hull has good stability and low water resistance. In particular, at the time of light wind, the posture is stabilized by the action of the sponson, while at high speed, the water resistance is further reduced by separating the sponson from the water surface. This makes it easy for beginners to ride.

The outriggers have their feet adjustable so that when they are not needed, they can be pulled up to reduce water resistance and increase speed. Since the bottom of the hull is almost circular, the hull itself can be easily tilted to the left and right by pulling up the outrigger to balance the left and right.

[Brief description of the drawings]

1 is a perspective view showing a running state of an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a plan view, FIG. 4 is a front view showing a movable range of a sponson, and FIGS. 7 are sectional views taken along line VV, VI-VI, and VII in FIG. 2, respectively.
FIG. 8 is a perspective view showing a housed state. 10 …… Hull, 40 …… Mast, 42 …… Boom, 48 …… Sale, 50 …… Sponson, 52 …… Outrigger, 54 …… Gear room that houses the ratchet mechanism, 56 …… Pedals.

Claims (1)

(57) [Claims] 1. A hull having a bottom surface formed of a substantially circular curved surface, the center of curvature of which is located within the closed cross-sectional shape, and which has a footrest surface on its upper surface, a long hull before and after, and a lower end at least in the front-back direction on the upper surface of the hull. A mast swingably mounted on the mast, a boom having a front end pivotally and swingably mounted in the middle of the mast, a sail stretched between the mast and the boom, and a boom below the boom. An outrigger protruding at least one of the left and right sides from the hull and having upward rotation return behavior imparted from a substantially horizontal position; and an outrigger which allows downward rotation of the outrigger and restricts upward rotation. A ratchet mechanism for properly fixing the outrigger to a rotational position, a pedal operable with a foot for releasing the ratchet mechanism to return the outrigger to an upward rotation, and a sponge attached to a rotational end of the outrigger. And a down, small surface sailing device being characterized in that the adjustable fixing angle of the outrigger foot while standing and gripping the boom to the foot surface.