JPS638096A - Man power boat - Google Patents

Abstract

PURPOSE:To obtain a light man power boat by supporting a hull on the upper part of a double-body type immersed buoyant body via leg parts, rotating a screw in said immersed buoyand body by means of a stepping driving device to generate a jet stream, and reducing the resistance of water. CONSTITUTION:A hull 1 which is floated on a water surface is supported on the upper parts of double-body type immersed buoyant bodies 5 via leg parts 3. The hull 1 is formed into a spherical shape with transparent synthetic resin, etc., and a seat 9, stepping pedals 19, a steering handle 44, etc. are provided in it. By rotating the stepping pedals 19, screws provided in the buoyant bodies 5 are rotated, jetting water which is sucked in from buoyant-body front opening parts 11 out of rear discharging ports 13 as jet streams to obtain propulsion. Thereby, since the buoyant bodies 5 are completely immersed in water being connected to the upper part on the water surface only via the leg parts, the propulsion resistance can be reduced, to obtain a light man power boat which enable speed-up with a little labor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a human-powered boat, and more particularly to a human-powered boat equipped with a submerged jet driven by human power.

(Prior art) Conventionally, boats driven by human power have been equipped with oars on the left and right sides of the boat in the direction of travel, and these oars are rowed by hand to propel the boat; Some boats are equipped with a propeller that drives the propeller and a pedal that drives the propeller, and the boat is propelled by stepping on the pedal with the foot.

(Problem that the invention aims to solve) In recent years, sports have become popular as a way to increase physical strength or as a part of fashion, and many people have begun to participate in competitive sports and compete in skills. There is.

Among these competitive sports, the sport called triathlon in particular is a combination of three different sports: swimming, cycling, and marathon, and is currently considered to be a demanding sport. It is likely that new sports similar to triathlon will continue to emerge and become more popular. Therefore, it is thought that competitions that combine human-powered boats will be created in the future, but conventional human-powered boats are propelled by rowing oars or by rotating propellers, as mentioned above. Therefore, there was a problem that not only was it susceptible to water resistance, making it unsatisfactory for competitive sports where speed is vital, but also that the oars or propellers were at great risk of causing injury to people swimming. .

The present invention aims to solve the above-mentioned problems and provide a human-powered boat that can increase speed and be safely propelled.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a jet driven by human power submerged in the water on a hull having a buoyant body, and propels the hull with the jet. The structure is as follows.

(Function) According to this invention, when the jet is driven by human power,
This underwater jet propels a ship equipped with a buoyant body.

(Example) Next, the present invention will be described based on an example shown in the drawings.

The human-powered boat of this embodiment is of a so-called semi-submersible type, and the lower part of the hull 1 that floats on the water surface has an upper part 3a.
Two leg parts 3 are fixed by protruding, and two buoyant bodies 5 are submerged in the water via these leg parts 3. A jet 7 that is driven by human power and propels the hull 1 is provided in the floating body 5 submerged in the water.

The hull l is made of transparent synthetic resin or the like and is formed into a spherical shape with the front and upper sides open. A seat 9 on which a person can sit is placed inside the hull 1.

The buoyant body 5 is made of a lightweight and strong material such as styrene foam, and has an opening 11 in its front surface.

A jet 7 is provided behind the opening 11, and a plurality of discharge ports 13 communicating with the opening 11 and the jet 7 are further provided behind the jet 7.

A transmission device 15 that transmits human power to the jet 7 includes the hull 1,
It is provided over the leg portion 3 and the buoyancy body 5. That is,
A drive box 17 is mounted on the hull 1 in front of the seat 9, and two rotatable pedals 19 are provided on both sides of the drive box 17. Both pedals 19 are interlocked via a shaft portion 21 disposed laterally through the drive box 17, and a roller 23 is fixed to this shaft portion 21. This roller 23 is interlocked and connected via a belt 24 to a roller 27 fixed to a shaft portion 25 parallel to the lower side of the shaft portion 21 . Both sides of the shaft portion 25 are located at upper portions 3a, 3a of the leg portion 3 that protrude into the hull 1, and rollers 29 are fixed to both ends thereof. This roller 29 is the leg part 3
The buoyant body 5 is
The roller 3 located in the gap 33 formed in the middle part of the roller 3
It is interlocked with 5. A bevel gear 39 is fixed to the other end of the shaft portion 37 that pivotally supports the roller 35.
This bevel gear 39 meshes with a hevel gear 41.

A roller 45 is fixed to the other end of the shaft portion 43 to which the bevel gear 41 is fixed. This roller 45 is further interlocked with a roller 51 fixed to the rotating shaft 49 of the jet 7 via a belt 47. Note that the belt 31 within the leg portion 3 is stretched by a tension rod 31a.

53 is a steering rudder provided at the rear of the buoyant body 5; 55 is a manual steering handle connected to the traveling rudder 53 by an interlocking device (not shown); The direction of travel can be changed. Further, 57 is a brake linked to the transmission device 15.

The operation of one embodiment of the present invention having the above configuration will be explained.

Get into the hull 1, sit on the seat 9, operate the travel steering wheel 55 as appropriate, and steer the ship with the travel rudder 53.
When the pedal 19 is depressed, driving force is transmitted to the jet 7 by the transmission 15. With this transmitted driving force,
The jet 7 is driven, water is sequentially taken into the jet 7 through an opening 11 formed on the front surface of the buoyant body 5, and is discharged from the outlet 13 to the outside of the buoyant body 5, thereby propelling the hull 1 forward.

Furthermore, when the pedal 19 is depressed in the opposite direction, water is sequentially dragged into the jet 7 from the discharge port 13 and discharged from the opening 11 to the outside of the buoyancy body 5, and the hull 1 is propelled and retreated.

In this way, the water is ejected by the jet 7 submerged below the water surface and a propulsion force can be obtained, so the resistance of the water can be reduced and the speed can be increased with less effort. Furthermore, since the jet 7 provides the propulsion force, there is no risk of hurting swimming people or the like even while the jet 7 is being driven.

FIG. 4 shows another embodiment. In this boat, the shape of the hull 1 is made smarter than that of the first embodiment, and it is aesthetically superior, has less wind resistance, and is designed to further increase speed. It is something that can be done.

Note that the jet 7 is not limited to the one in the above embodiment;
A hydro jet 7A as shown in the figure may be used, and in this case, the jet ports 13 are provided in parallel at the rear in the traveling direction.

Further, in the above embodiment, the hull 1 and the buoyant body 5 are formed separately, but they may be integrally formed, for example, a conventional rowing boat. Although the jet 5 is shown as a so-called semi-submersible type, which is submerged below the water surface, the jet 7.7A is not limited to this.

Furthermore, the buoyancy body 5 may be provided with a buoyancy adjustment device so that the buoyancy can be adjusted.

Further, although the operating handle 55 is shown to be operated by hand, it may be constructed so that it can be operated by foot. This configuration allows your hands to be completely free, which is particularly convenient when you need to use your hands, such as when fishing.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the jet is submerged under the water surface and jets out water while submerged, so water resistance can be reduced and speed amplifiers can be achieved with less effort. In addition, it can be propelled safely without any fear of injuring people swimming.

[Brief explanation of drawings]

The drawing shows an embodiment of a human-powered boat according to the invention,
Fig. 1 is an overall perspective view, Fig. 2 is a side view of the fleet, Fig. 3 is a perspective view of the drive device, Fig. 4 is an overall perspective view of another embodiment, and Fig. 5 is a side view of the fleet. FIG. 1. Hull 3. Legs 5. Buoyant body 7. Jie, Door A. Hydrojet representative Patent attorney Yasuo Miyoshi Figure 3 Figure N4 Figure 5

Claims (5)

[Claims] (1) A human-powered boat characterized in that a jet driven by human power is provided submerged in the water on a hull having a buoyant body, and the hull is propelled by the jet. (2) The human-powered boat according to claim 1, wherein the jet is a hydro jet. (3) The human-powered boat according to claim 1 or 2, wherein the hull is located above the buoyant body via the legs. (4) The human-powered boat according to claim 1, 2, or 3, wherein the buoyant body is located below the hull and submerged. (5) The human-powered boat according to claim 4, wherein the jet is provided within a buoyant body.