JP2525387B2 - Display device for small jet propulsion boat - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a display device for a small jet propulsion watercraft that slides on a water surface.

(Prior Art) In recent years, small jet propulsion boats that are engines and that slide on water have come into wide use. Since this small jet propulsion boat is used on various water surfaces, it may also slide along waves. For this reason, it may become invisible to other ships when positioned in the waves during the gliding. Vehicles with this kind of problem include cars (buggy) that drive in undulating deserts. In this car, a flag is set to indicate the existence of one's own, which prevents collisions with other cars. I have to. It is possible to attach this flag to the above small jet propulsion boat,
When the flag is attached, there is a drawback that the structure such as the attachment of the flag pole becomes large, and the resistance due to it becomes large and the propulsion efficiency is lowered.

Furthermore, since small jet propulsion boats are vehicles that enjoy motility, they often fall, and if the flag is attached, the flag pole may break when it falls, which may be harmful to the occupants.

(Object of the Invention) The present invention has been made to solve such a conventional problem, and there is no danger of injuring a passenger at the time of a fall, and a decrease in propulsion efficiency is small, and the present invention can be applied to other ships. (EN) A display device for a small jet propulsion watercraft capable of reliably displaying the presence of the self.

(Structure of the Invention) The present invention relates to a small jet propulsion boat equipped with a jet propulsion machine having a water intake opening to the bottom of the ship for sucking water, and a nozzle for ejecting water toward the rear of the hull. Place a pump in the body, open the upstream end of the water conduit connected to the suction side of this pump to the ship bottom behind the water intake, and connect the downstream end of the water conduit connected to the discharge side of the pump. It was opened above the water surface of the stern.

 The water conduit may be a flexible hose.

With the above configuration, the following operational effects are achieved.
In other words, the water sucked from the upstream end of the water conduit can be jetted upward at the stern, so with a simple configuration, even if the hull is located at the bottom of the wave, it will not It can be displayed reliably.

When inhaling water from the upstream end of the water conduit, the upstream end of the water conduit was opened at the bottom of the ship behind the water intake of the jet propulsion machine. It does not disturb the flow of water to be sucked, and water can be smoothly sucked in through the water intake port despite the fact that the water conduit is opened at the bottom of the ship.

Since the water conduit with the upstream end opened at the bottom of the ship was connected to the suction side of the pump located inside the hull, the water conduit upstream from the pump could be located inside the hull, and the water conduit was placed outside the ship. It does not project and increase propulsion resistance.

(Embodiment) In FIGS. 1 to 3, a bottom plate 2 and an upper deck 3 are joined together at their peripheral portions to form a hull 1 of a jet propulsion watercraft, and a portion surrounded by the bottom plate 2 and the upper deck 3. A sealed engine room is formed in which the engine 4
Is installed. Further, a cockpit 20 is formed in the rear part thereof, and a seat 5 is formed so as to project in the central portion in the ship width direction. A protrusion 60 is formed on the upper deck 3, and a handle 6 is formed on the upper end of the protrusion 60.
10 puts his foot on the cockpit 20 and holds the steering wheel 6 to drive the ship.

A flow path 7 is formed below the seat 5, a water intake 70 that opens to the bottom of the ship is formed at one end of this flow path, and a nozzle 71 facing the rear of the stern is changeable at the other end. It is provided. Also, the propeller shaft rotated by the engine 4
A propeller (not shown) is attached to the tip of 40, and the propeller rotates in the water passage 7 to suck water from the water intake port 70 and discharge it from the nozzle 71, thereby swinging the hull 1 in a predetermined direction. A jet propulsion machine designed to be propelled is installed.

A pump 8 is installed at an appropriate position in the hull 1, a suction-side hose (water conduit) 81 connected to the pump 8 is guided to the ship bottom, and a water intake port 83 that opens to the ship bottom is formed at its tip. Further, the hose (water guide pipe) 82 on the discharge side is guided to the stern part, and a water ejection port 84 is formed at the tip part thereof. The water jet port 84 is directed rearward and upward from the rear end of the floor 21 of the cockpit 20.

In the above configuration, the pump 8 is driven while the ship is gliding to suck water from the water suction port 83, and through the hoses 81 and 82 from the water jet port 84 as shown by arrow 9 in FIG. To squirt backwards and upwards. As a result, the following effects can be achieved with a simple configuration.

The water sucked from the upstream side of the water conduit 81 (water suction port 83)
Since the water can be jetted upward from the water spout 84 at the stern part, even if the hull 1 is located at the bottom of the wave, the presence of the self can be reliably displayed on another ship with a simple configuration. .

When injecting water from the upstream end (water suction port 83) of the water conduit 81, the upstream end 83 of the water conduit 81 was opened to the ship bottom behind the water intake port 70 of the jet propulsion machine.
The presence of the upstream end 83 of 81 does not cause turbulence in the flow of water sucked from the water intake 70,
Despite opening the water conduit 81 on the bottom of the ship, the water intake 70
Water can be smoothly inhaled from.

Since the water conduit 81 having the upstream end 83 opened on the bottom of the ship is connected to the suction side of the pump 8 arranged in the hull 1, the water conduit 81 upstream of the pump 8 can be arranged in the hull 1. The water conduit 81 does not project outboard to increase propulsion resistance.

Further, in the above-mentioned configuration, even if the hull 1 falls, there is no protrusion from the hull 1, so there is no possibility of harming the person 10. Further, since the water is introduced from the water intake port to the ejection part by the hose, there is an advantage that the water ejection part can be installed at a position where it does not interfere with any hindrance of the hull 1.

(Effects of the Invention) As described above, according to the present invention, there are the following effects.

Since the water taken from the upstream end of the water conduit can be jetted upward at the stern, a simple structure ensures the presence of other ships even if the hull is located at the bottom of the wave. Can be displayed.

When inhaling water from the upstream end of the water conduit, the upstream end of the upstream water conduit was opened to the ship bottom behind the water intake of the jet propulsion machine. It does not disturb the flow of water to be sucked, and water can be smoothly sucked in through the water intake port despite the fact that the water conduit is opened at the bottom of the ship.

Since the water conduit with the upstream end opened at the bottom of the ship was connected to the suction side of the pump located inside the hull, the water conduit upstream from the pump could be located inside the hull, and the water conduit was placed outside the ship. It does not project and increase propulsion resistance.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view of a hull showing an embodiment of the present invention, FIG. 2 is a plan configuration layout view thereof, and FIG. 3 is an enlarged perspective view of a stern part thereof. 1 ... Hull, 4 ... Engine, 5 ... Seat, 6 ... Handle, 7 ... Flow path, 8 ... Pump, 81,82 ... Hose (water conduit), 83 ... Water suction port, 84 ...... Water spout.

Claims (1)

(57) [Claims] Claims: 1. A small jet propulsion boat equipped with a jet propulsion machine having a water intake opening to the bottom of the ship for sucking water, and a nozzle for ejecting water toward the rear of the hull. The upstream end of the water pipe connected to the suction side of this pump is opened to the ship bottom behind the water intake port, and the downstream end of the water pipe connected to the discharge side of the pump is placed on the water surface of the stern. A display device for a small jet propulsion boat, which is opened at the top.