JP4240475B2 - Extremely small water vehicle propulsion device - Google Patents

Description

The present invention relates to a propulsion device that is detachably mounted on a very small water vehicle such as a surfboard and has a buoyant body such as a float.

2. Description of the Related Art Conventionally, a buoyancy assist device in which a float is installed on a small water vehicle to assist the buoyancy of the small water vehicle is known (for example, see Patent Document 1).
U.S. Pat. No. 3,294,055

In Patent Document 1, floats ( buoyancy bodies ) are arranged so as to extend to the left and right of a hull of a small water vehicle provided with a propulsion device fixed, and the left and right floats are arms pivotally attached to the hull. It is attached to both ends.

The buoyancy body provided in the above-mentioned conventional small water vehicle is assembled integrally with the hull, and the movement of the whole hull is fixed, and the hull does not have a propulsion device or propulsion. I can't select exercises with a chance.

The present invention is, with respect to very small sports and watercraft that suitable to the player, such as surfboards and small boats with no propulsion unit, equipped with a propulsion device comprising any buoyancy body removably, surfboard surfing It is an object of the present invention to provide a propulsion device that can be detachably mounted on an extremely small water vehicle equipped with an attachment that can be adapted to the enjoyment method using a propulsion device that uses a buoyant body in addition to the conventional enjoyment method. .

The invention according to claim 1, a body quite a propulsion device comprising a mounting mechanism for detachably on a small watercraft, removably mounted via a mounting mechanism wherein a very small watercraft, said body And a buoyancy body attached to the main body .

The invention according to claim 2 is characterized in that, in claim 1, the buoyancy body attached to the main body can be adjusted in position in the front-rear direction with respect to the main body.

The invention according to claim 3 is characterized in that, in claim 1 or claim 2, the position of the buoyancy body attached to the main body is adjustable in the left-right direction.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the buoyancy body attached to the main body is attached to the main body so as to be swingable via a rotation mechanism. And

In the invention according to claim 1, since the propulsion unit and the buoyancy body are attached to the main body that is detachably attached to the very small water vehicle via the attachment mechanism, the detachment can be made to the floating body for games such as surfboards and windsurfing. Attaching a propulsion device, in addition to the conventional way of enjoying with natural power and human power such as a surfboard, etc., a new way of enjoying by improving the convenience when moving to a nearby place by propulsion of the propulsion unit driven by a surfboard etc. There is also an advantage that variations in play such as surfboarding and windsurfing can be increased.
In particular, since the buoyancy body is attached to the propulsion unit, the present invention can adjust the feeling when balancing the buoyancy by moving the center of gravity while propelling, and propelling. While swinging from side to side, steering play by moving the center of gravity can be performed.

Furthermore, because the propulsion unit is detachably attached to the surfboard, etc., it is possible to achieve water play with the propulsion unit without changing the conventional surfboard side and floating body, and surfing by conventional human power and natural force by removing the propulsion unit There is an advantage that other water play can be performed.
Furthermore, since an extremely small water vehicle such as a surfboard and a boat and a propulsion device having a buoyant body can be separated and disassembled, there is an advantage that the transportability of the propulsion device is improved.

In the invention according to claim 2, since the position of the buoyancy body attached to the main body can be adjusted in the front-rear direction, in addition to the effect of claim 1, the buoyancy body such as a surfboard can be moved in the front-rear direction. Thus, the center of gravity in the front-rear direction can be moved while propelling, and the sense of balancing with buoyancy can be adjusted to the rider's preference.

In the invention according to claim 3, since the position of the buoyancy body attached to the main body can be adjusted in the left-right direction, in addition to the effect of claim 1 or 2, in the left-right direction of the buoyancy center of the buoyancy body such as a surfboard. Can be adjusted, the center of gravity in the left-right direction can be moved, and the sense of balancing with buoyancy can be adjusted to the rider's preference.

In the invention according to claim 4, since the buoyancy body attached to the main body is attached to the main body via a rotation mechanism so as to be swingable, the effect according to any one of claims 1 to 3 is added. the buoyant body on the water changes can be followed, it is possible to follow the movement of the buoyant body relative to the water surface changes.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a propulsion device main body of an extremely small water vehicle according to the present invention, with a buoyant body attached thereto .

The propulsion device main body 1 is formed of pipe members and the like, and includes a front cross member 3 laid between the left and right members 2, 2 and a rear cross member 4 laid between the rear portions.
The rear end portions of the left and right members 2 and 2 are erected upward in an L shape, and are arranged horizontally and vertically between the raised rear end portions 2a and 2a. The mounting part 5 of a part is comprised.

A support plate 6 is installed between the middle part and the rear part of the left and right members 2, 2, and the left and right auxiliary frames 7, 7 having a symmetrical shape are arranged symmetrically on the support plate 6 since it is U-shaped in plan view. .
The buoyancy bodies 11, 11 are attached and supported on the left and right auxiliary frames 7, 7 so as to face in the front-rear direction.
Suction cups 8 (... indicate a plurality, the same applies hereinafter) are hung on the lower surfaces of the left and right members 2 and 2 of the main body 1 in the vicinity of the four joints with both ends of the front and rear cross members 3 and 4. , Project.

2 is a plan view of a main body of a propulsion device for an extremely small water vehicle, which is a plan view of FIG. 1, FIG. 3 is a side view thereof, and FIG. 4 is a front view thereof.
This will be described in detail with reference to FIGS. 2 to 4 and FIG.

The left and right members 2 and 2 of the main body 1 are formed such that the interval between the front portions is large, the interval between the rear portions is sequentially reduced, and the rear portion is formed narrow.
The reason is that the front part is wide and the rear part is narrow so as to roughly follow the planar shape of a floating body such as a surfboard or a hull to which the main body is attached.
The front and rear widths are arbitrary, and the front and rear widths may be the same or substantially the same.

  The front cross member 3 has a curved shape upward, the front part is wide and the rear part is narrow. The members 2 and 2 are overlapped on both outer tops and integrally joined by welding or the like.

The left and right auxiliary frames 7 and 7 are formed of pipe material or the like, have a symmetrical U-shape that opens outwardly, and are arranged in the middle portion of the support plate 6 in the left-right direction and are longitudinally facing the left and right sides. Parts 7a and 7a, and front and rear lateral flange parts 7b and 7c extending outward from the front and rear ends of the flange parts 7a and 7a, respectively.
Each auxiliary frame 7, 7 is provided with an auxiliary hook portion 7 d facing the front-rear direction connecting the front and rear horizontal rib portions 7 b, 7 c adjacent to the outer sides of the vertical rib portions 7 a, 7 a of the front and rear horizontal rib portions 7 b, 7 c. .

FIG. 5 is an enlarged perspective view of a main portion showing a structure in which the vertical flange portion of the auxiliary frame is supported on the support plate in a swingable manner.
Describing with reference to the above-described drawings, the support structure for supporting the vertical flange portions 7a, 7a of the auxiliary frames 7, 7 to the support plate 6 is separated from the front and rear of the intermediate portion of each vertical flange portion 7a. Two reverse concave support brackets 9 and 9 are supported so as to be swingable.
With the support brackets 9 and 9 that support the vertical flange portions 7a and 7a on the support plate 6, a rotation mechanism of the buoyancy bodies 11 and 11 supported by the auxiliary frames 7 and 7 is configured.

The support plate 6 is provided with a plurality of mounting holes 6b for attaching the support fittings 9, 9 at a predetermined pitch in the left-right front-rear direction of the vertical flange portions 7a, 7a of the left and right auxiliary frames 7, 7.
As a result, the position of the vertical flange portions 7a, 7a determined by the restriction rods 7e, 7f, which will be described later, is changed by the selection of the mounting holes 6b, to which the support fittings 9, 9 are attached. The position can be adjusted in the front-rear direction, and the front-rear positions of buoyancy bodies 11, 11 described later supported by the auxiliary frames 7, 7 can be adjusted.

  The front and rear portions of the vertical flange portions 7a supported by the support fittings 9 and 9 are provided with restricting rods 7e and 7f that are inclined upward inward of the support plate 6, while the rear one 7f is vertically One end portion 10a of the torsion spring 10 wound around a part of the flange portion 7a is locked, and the other end 10b is locked to the support bracket 9 on this side (see FIG. 5). The return springs of the rotating auxiliary frames 7 and 7 are used.

Buoyancy bodies 11, 11 such as floats are connected between the lateral flange portions 7b, 7c before and after the auxiliary frames 7, 7.
The buoyancy bodies 11, 11 have a length in the front-rear direction. The front and rear portions of the buoyant body comprising, horizontal portion 7b, connecting portions 11a through via holes 7c, 11b respectively with connecting portions 11a, fastening screw 11c to the end portion of 11b, and 11c.

Passing between the front and rear lateral rib portions 7b and 7c of the left and right auxiliary frames 7 and 7 through the holes of the connecting portions 11a and 11b as described above, adjusting the lateral position of the front and rear lateral flange portions 7b and 7c and fastening By tightening the screws 11c and 11c, the buoyancy bodies 11 and 11 are fastened at predetermined positions of the lateral flange portions 7b and 7c.
By loosening the fastening screws 11c and 11c, the buoyancy bodies 11 and 11 can move in the length direction (left and right direction) of the horizontal flange portions 7b and 7c, and the position of the buoyancy bodies 11 and 11 can be adjusted.

6 and 7 are longitudinal front views of the portions of the auxiliary frames 7 and 7 that support the buoyancy bodies 11 and 11, FIG. 6 shows a normal state, and FIG. It is the figure which showed the state which rotated the auxiliary | assistant frame.
The body 1 is mounted and supported on the left and right members 2 and 2 on, for example, a surfboard 20 which is a floating body via suckers 8.

  In FIG. 6, the auxiliary frames 7 and 7 are substantially parallel to the upper surface of the floating body 20 and are in a horizontal state. As described above, the auxiliary frames 7 and 7 are swingable by the pivot mechanism at the vertical flange portions 7 a and 7 a. Yes, as shown on the left side of FIG. 7, it can be rotated in the arrow direction (upward tilt direction) against the biasing force of the return spring. The swing limit is determined by the restriction rods 7f and 7e coming into contact with the upper surface of the support plate 6.

FIG. 8 is a perspective view illustrating a state in which the propulsion unit 12 is attached to the main body 1 to which the buoyancy bodies 11 and 11 are attached, and is a diagram illustrating a state immediately before the propulsion unit 12 is attached.
The propulsion unit 12 is composed of an outboard motor, and the outboard motor 12 is a small output type engine cover 12a that covers the engine, fuel tank and the like from above, an under cover 12b that covers the bottom, and an extension case that extends downward. 12c, a lower gear case 12d, and a propeller 13 provided thereon.
A stern bracket 14 is provided on the front side of the extension case 12c so that the outer periphery of the extension case 12c is slidable. The stern bracket 14 is sandwiched from above at a mounting portion 5 provided at the rearmost portion of the main body 1 as indicated by an arrow, and a fastening member. The propulsion unit 12 is attached to the rear end of the main body 1 by tightening with 14a and 14a.

FIG. 9 is a perspective view showing a state in which the propulsion unit main body 1 equipped with the propulsion unit 12 is detachably attached to the surfboard 20.
As described above, the main body 1 is detachably coupled to the upper surface of the rear half portion 20a of the surfboard 20 with the suction cups 8 at the four corners.

The left and right buoyancy bodies 11, 11 attached to the main body 1 can be adjusted in position in the front-rear direction as described above.
Further, the left and right buoyancy bodies 11, 11 are swingable via the vertical flange portions 7 a, 7 a of the auxiliary frames 7, 7. Furthermore, the position of the left and right buoyancy bodies 11, 11 can be adjusted in the left-right direction at the front and rear side portions 7a, 7b.
As described above, the main body 1 with the propulsion unit 12 mounted on the surfboard 20 is detachably attached via the suction cups 8 and is operated as the surfboard 20 propelled by the propulsion device having the propulsion unit 12.

FIG. 10 is an explanatory side view showing a state where surfboard play is performed with the propulsion unit attached.
The propulsion unit 12 is installed at the rear of the surfboard 20 via the propulsion unit main body 1, and the surfboard 20 can be propelled by the propulsion force of the propulsion unit 12.
Therefore, during surfing play, the propulsion force of the propulsion unit 12 can be used together to move to the near field, and the propulsion force of the propulsion unit 12 can be used, so that it is possible to move quickly to the surfing point.

FIG. 11 is an explanatory view showing a state of maneuvering in which the boat body is tilted by water play by a water vehicle, and FIG. 12 is an explanatory view of the state of FIG.
As shown in FIG. 12, by tilting the hull 20, the tilted buoyancy body 11A is supported in a swingable manner and floated on the water surface due to the buoyancy, so that the buoyancy body 11A The rotation is restricted by the restriction rod 7f.
And even if the hull 20 tilts and the left half of the figure is submerged, further tilting of the hull 20 is restricted and buoyancy is maintained.
The opposite buoyancy body 11 </ b > B is held parallel to the upper surface of the hull 20.
When tilted to the opposite side of the figure, the situation in the figure is reversed.

FIG. 12 shows the hull 20 in a normal posture.
In the hull 20, the left and right protruding buoyancy bodies 11, 11 of the main body 1 mounted on the hull 20 face the water surface and maintain a substantially horizontal state by the buoyancy.

Although the present invention is mounted on a surfboard in the embodiment, it can be mounted on other small hulls such as windsurfers.
Moreover, although the suction cup is used as the detachable mounting mechanism, the detachable mounting mechanism to the hull is not limited to this.
Depending on the form of the extremely small water vehicle, a mounting mechanism other than a suction cup may be adopted.For example, in a windsurf board with a detachable sail and mast, the existing male and female mounting mechanisms are used to A mounting tool can also be used, and the mounting mechanism is not limited to the suction cup described above.
In the embodiment, an outboard motor is used as the propulsion unit (propulsion device). However, a water jet pump may be used instead of the outboard motor.
Moreover, although it is a front-and-rear position adjustment means of the auxiliary frame, the vertical stem portion 7a may have an extendable structure, and the position adjustment means of the buoyancy body is not limited to the above means.

The propulsion device for an extremely small water vehicle according to the present invention is suitable for surfboards, windsurfing, and other extremely small water vehicles.

It is a perspective view of the main body of the propulsion device of the very small water vehicle which concerns on this invention, and is a figure of the state which attached the buoyancy body . It is a top view of the main body of the propulsion machine of the said small water vehicle, and is a top view of FIG. FIG. 3 is a side view of FIG. 2. FIG. 3 is a front view of FIG. 2. It is an expansion perspective view of the principal part which shows the structure which supports the vertical collar part of an auxiliary | assistant frame on a support plate so that rocking is possible. FIG. 6 is a vertical front view of the portion of the auxiliary frame that supports the buoyancy body , and FIG. It is the figure which showed the state which rocked one auxiliary frame in order to demonstrate rotation of an auxiliary frame. It is the figure which showed the state which rotated one auxiliary frame in order to demonstrate rotation of an auxiliary frame. It is a perspective view explaining the state which attaches a propulsion machine to the main body which attached the buoyancy body , and is a figure which shows the state just before attaching a propulsion part. It is a perspective view which shows the state which attached the propulsion machine main body equipped with the propulsion part to the surfboard so that attachment or detachment was possible. It is explanatory drawing which shows the state which performs surfboard play in the state which attached the propulsion machine. It is explanatory drawing which shows the boat maneuvering state which inclined the hull by the water play by the very small water vehicle. It is explanatory drawing of a boat body's normal posture similarly to the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main body, 7a, 9 ... Turning mechanism, 8 ... Removable mounting mechanism, 9, 6b ... Position adjustment mechanism in the front-back direction, 11 ... Buoyancy body , 7b, 7c, 11a, 11b ... Left-right position adjustment of a buoyancy body Mechanism, 12 ... propulsion device, 20 ... very small water vehicle.

Claims (4)

A propulsion device having a mounting mechanism that is detachable from an extremely small water vehicle,
A main body detachably attached to the water vehicle via a mounting mechanism;
A propulsion unit attached to the body and a buoyancy body attached to the body ;
An extremely small water vehicle propulsion device characterized by comprising: 2. The extremely small water vehicle propulsion device according to claim 1, wherein a position of the buoyant body attached to the main body is adjustable in the front-rear direction with respect to the main body. 3. The extremely small water vehicle propulsion device according to claim 1, wherein a position of the buoyancy body attached to the main body is adjustable in the left-right direction. The extremely small water vehicle according to any one of claims 1 to 3, wherein the buoyancy body attached to the main body is swingably attached to the main body via a rotation mechanism. Propulsion machine.

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