JPS6268194A - Indicator for compact jet propulsion boat - Google Patents

Abstract

PURPOSE:To inform securely other ships of its own presence without degrading the efficiency of propulsion by providing on the stern of the above-captioned boat with a water jetting device directing one end under the water in the direction of water flow and the other end upward on the water. CONSTITUTION:A compact jet propulsion boat rotates a propeller interposed under the water path at the lower rear end of a seat 5 with an engine provided in an engine room in a hull 1 constituted from a bottom plate 2 and an upper deck coupled with each other on the peripheral edges. And water attracted from a suction port in the bottom of boat by rotating the propeller is jetted from a nozzle 7 provided to change its direction at the rear end of water path to obtain a thrust. In this case, on the bottom of stern of hull 1 is disposed a water jet pipe 8 having one end directed under the water in the direction of water flow and the other end directed upward on the water and fixed by a fixing means 80. And in sailing, water is jetted upward from the water jet pipe 8 to indicate the presence of the boat.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a display device for a small-sized jet propulsion boat that glides on the surface of water.

(Prior Art) Recently, small jet propulsion boats, which are small boats with engines that glide on water, have come into widespread use. This small jet propulsion boat often glides along the waves, and for this reason, it may become invisible to other boats when it is positioned between the waves, and because it glides at high speed, it may not be able to see other boats. There is a risk of an accident. Vehicles that have this problem include cars (buggys) that drive in the undulating desert, and these cars put up flags to display their presence, thereby preventing collisions with other cars. I have to. It is possible to attach this flag to the above-mentioned small jet propulsion boat, but the disadvantage is that attaching the flag would require a large-scale structure such as attaching the flag ball, and the resulting resistance would become large, reducing propulsion efficiency. be.

(Purpose of the Invention) This invention was made to solve such conventional problems, and it is a small jet that has a small drop in propulsion efficiency and can reliably indicate its presence to other ships. It facilitates the display device of the propulsion boat.

(Structure of the Invention) The present invention relates to a small boat that glides underwater, and is provided with a water jet device at the stern of the vessel, one end of which is directed underwater in the direction of water flow, and the other end is directed upward above the water surface. It is.

By using the water flow generated by the jet propulsion boat to jet upward in this manner, propulsion resistance is small and reliable display can be performed.

(Example) In FIGS. 1 to 3, a bottom plate 2 and an upper deck 3 are connected at their inner edges to form a hull 1, and a portion surrounded by the bottom plate 2 and upper deck 3 is sealed. An engine room has been formed. Further, a cockbit 4 is formed at the rear portion thereof, and a seat 5 is formed protruding from the center portion in the width direction of the ship. - A support column 60 is formed to protrude on the L portion deck 3, and a handle 6 is formed at the upper end thereof;
A person 10 in a seat 5-1- places a passenger 5-11 in the cockpit 4, holds the handle 6, and drives the boat.

An engine (not shown) is placed in the engine room,
A propeller is attached to the tip of the propeller shaft rotated by the engine, and the propeller is configured to rotate in a waterway disposed below the rear end of the seat 5. A nozzle 7 is attached to the tip of the waterway so that the direction can be changed, and the water sucked in from the suction port on the bottom of the ship is jetted in a predetermined direction by the rotation of the propeller, thereby turning and propelling the ship. I'm here.

A water jet pipe (water jet device) 8 is arranged at the bottom of the stern of the hull 1, with one end pointing underwater in the water flow direction and the other end pointing upward at the water surface E, and is fixed with a band 80 and bolts 81. .

FIG. 4 shows another embodiment of the present invention, in which a nozzle 7 is installed so as to be horizontally rotatable about a shaft 22 at the rear end of a flow path 21 through which a propeller rotates and jets out a water stream in the stern direction.
A water jet pipe 82 is provided on the upper side of the rear end portion, and is fixed by a band 83, with one end facing in the water flow direction and the other end facing upward.

FIG. 5 shows still another embodiment, in which a water jet member (water jet pipe) is formed on the upper side of the rear end of the nozzle 7 with a water jet passage 84 having one end facing the water flow direction and the other end facing upward. ) 85 is installed.

In the above configuration, when the boat is planed, a water flow is generated in the stern direction, so that water flows into the water jet pipe 8 in FIGS. 1 to 3.
The water flows into the water jet pipe 82 in FIG. 4 and the water jet pipe 85 in FIG. 5, and is jetted upward as shown by the arrow 9. Therefore, even when the propulsion boat is located at the bottom of a wave, other boats can be made aware of the propulsion boat's presence because of this jet of water. The resistance experienced by the water jet tube is very small, and therefore the influence of propulsion resistance is small.

(Effects of the Invention) As explained above, this invention provides a water spouting pipe in the ship 1, one end of which is underwater in the direction of water flow, (I!! It has a simple configuration, has a small J1f index efficiency, can reliably display its presence to other ships, and can prevent ship collisions.

[Brief explanation of drawings]

Fig. 1 is a side view of a hull showing an embodiment of the present invention, Fig. 2 is a rear view thereof, Fig. 3 is a partially enlarged view thereof, and Fig. 4 is a sectional view showing another embodiment of the invention. FIG. 5 is a J sectional view showing still another embodiment. 1... Hull, 4... Cockbit, 5... Seat,
6...Handle, 7...Nozzle, 8,82.85.
... Water spouting pipe, 9... Water gushing, 10... People. Patent applicant: Yamaha Hassenki Co., Ltd. Representative: Patent attorney: Etsushi Kotani Patent attorney: Chief 1) Patent attorney: Yasuo Itaya Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A small jet propulsion device that is a small boat that glides underwater, and is equipped with a water jet device at the stern of the ship, with one end pointing underwater in the direction of water flow and the other end pointing upwards on the water surface. Boat display.