JP2897294B2 - Display device of small jet propulsion boat - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a small jet propulsion boat that sails at high speed on the sea.

[Conventional technology]

2. Description of the Related Art Recently, small jet propulsion boats, which are small boats equipped with an engine and which slide on water by sucking water from the bottom of the boat and jetting water through a nozzle in a predetermined direction behind the stern, have been widely used. Was. These small jet propulsion boats often glide along the waves, so they may not be visible to other ships when they are in the middle of the wave during the run. Means to avoid this is required. As means for this purpose, for example, Japanese Patent Application Laid-Open No. Sho 62-68194 proposes a device in which a water injection pipe is provided at the stern, and water flowing on the bottom of the ship is injected upward through the water injection pipe toward the stern. .

[Problems to be solved by the invention]

In the above configuration, the water is always jetted upward from the water injection pipe during the ship's planing, but when the boats are approaching each other, such as when racing, the display is not necessary. Instead, the jetted water is applied to another ship, and the jetting of water is rather inconvenient.

The present invention has been made in order to solve such a conventional disadvantage, and has a small size in which water is jetted only when necessary to perform a display function, and water is not jetted upward when unnecessary. It is an object of the present invention to provide a display device for a jet propulsion boat.

[Means for solving the problem]

According to a first aspect of the present invention, a water jet pipe having a smaller diameter than a nozzle is provided in a propulsion unit that generates a propulsion force and a turning force of a ship by sucking water from a ship bottom and injecting water rearward from a stern through a nozzle. One end opening of the water injection pipe is inserted into the rear end of the nozzle, the other end opening of the water injection pipe is opened so as to be directed above the water surface, and a valve for blocking water flow to the water injection pipe. And an opening / closing means for the valve is attached, and an operating means for operating the opening / closing means is provided near the operating handle.

In a second aspect of the present invention, a water jet pipe having a smaller diameter than the nozzle is provided in a propulsion unit that generates thrust and turning force of the ship by sucking water from the bottom of the ship and jetting backward from a stern through a nozzle, One end opening of the water injection pipe is inserted into the rear end of the nozzle, and the water injection pipe is connected to the nozzle so that the other end opening can be changed between a state in which the other end is directed above the water surface and a state in which it is not directed above the water surface. Is what is being done.

[Action]

In the above-described configuration, a display is provided in which water is jetted above the stern portion by the hull running to notify other ships of the presence of the hull, and the display is not performed by operating the valve or changing the direction of the water injection pipe.

〔Example〕

In FIG. 1, the hull 1 is composed of a deck member 13 and a bottom plate 12 which are joined to each other at their peripheral edges, and is formed from a space substantially enclosed by a portion surrounded by the deck member 13 and the bottom plate 12. An engine room is formed and the engine 8 is arranged.

In addition, a seat base 14 is formed to protrude from the center of the hull on the rear side of the hull, and a seat is formed above the seat base 14,
A foot deck that opens to the stern end is formed between the seat base 14 and the gunnels 19 on both sides.

At the bottom of the stern stern below the seat stand 14, the engine 8
A propulsion device 81 driven through a propulsion shaft 80 is disposed in a waterway 82, sucks water from an opening 83 at the bottom of the ship, and jets water rearward in a predetermined direction from a stern of a nozzle 6 swinging in a horizontal plane. By doing so, the hull 1 is propelled and turned.

The operator 16 on the seat puts his foot on the foot deck and grips the operation handle 15 to steer the hull 1.

As shown in FIG. 2 to FIG.
The base 76 of the water injection pipe 7 is fixed to the inner surface of the rear part of the nozzle 6 by bolts or the like, and the water injection port 71 at the tip of the water injection pipe 7 faces upward. An opening / closing valve 9 for shutting off the flow of water is arranged in the water injection pipe 7, and the valve 9 rotates around the shaft 90 to switch between a state in which the flow path is opened and a state in which the flow path is closed. . The end of the shaft 90 has a lever 91 outside the water injection pipe 7.
The lever 91 is provided at one end with a spring 93 connected to a rib 73 attached to the tip of the water injection pipe 7.
The spring 93 applies a force in the direction in which the valve 9 opens. A stopper 92 is provided on the outer surface of the water injection pipe near the lever 91, and the end of the stopper 91 is rotated
Is locked by fitting into the recess of
Is configured to close the flow path of the water injection pipe 7 and maintain that state.

In the above configuration, when the engine 8 is driven, the rotation of the propulsion unit 81 sucks water from the opening 83 at the bottom of the hull, and jets water toward the rear of the stern in a predetermined direction from the nozzle 6 swinging in a horizontal plane. Propel and swivel. 2 and 5, when the valve 9 is open, the high-speed water in the nozzle 6 is sent into the water injection pipe 7 and is injected upward from the injection port 71 to form the hull 1 Is displayed to indicate the presence of. When the flow path in the water injection pipe 7 is closed by rotating the lever 91 and locking it to the stopper 92 as shown by the imaginary line in FIG. 5, water is not injected even when the hull 1 sails. .

6 and 7 show another embodiment of the present invention,
At the end of the nozzle 6, a holding body 61 is attached.
The end of the operation cable 62 is held by the 61, and the end of the inner cable 63 of the operation cable 62 is connected to the shaft 90 of the valve 9.
Is coupled to a lever 94 provided at the end of the lever. The other end of the operation cable 62 is guided near the operation handle 15,
Operation means (not shown) is provided in that portion. By operating the operation unit, the inner cable
The valve 94 is opened and closed by rotating the lever 94 via 63 as shown by the arrow in FIG.

This configuration has the advantage that the operator 16 can switch the display by opening and closing the valve 9 in the cockpit.

FIGS. 8 and 9 show still another embodiment of the present invention, in which a water injection pipe 5 is connected to a water introduction pipe 51 attached to the inside of the rear end of the nozzle 6 and to the water introduction pipe 51. And a water jet side pipe 52 for jetting water. The flange 51a at the end of the water jet side pipe 51 and the flange 52a at the end of the water jet side pipe 52 are abutted, and the cap nut 54 is connected to the flange 52a.
To the flange 52 via the bush 53.
a, tighten both flanges 51a and 52a together,
1, 52 are rotatably connected to each other in a state where friction resistance is given by a bush 53. Therefore, by manually rotating the water jet side pipe 52 against the frictional resistance of the bush 53, it is possible to switch between an upward state in which display is performed and a state in which water is jetted horizontally and no display is performed. Is configured.

The rotation of the water injection side pipe 52 may be performed from the cockpit by appropriate means.

〔The invention's effect〕

As described above, according to the present invention, water is jetted above the stern portion by hull running, so that a display indicating the presence of the hull to other ships is made, and valve operation or water jetting is performed as necessary. The display can be prevented from being performed by the change in the direction of the tube, so that it is possible to cope with both cases where the display is necessary and cases where the display is not necessary.

[Brief description of the drawings]

1 is a side view of the entire hull showing an embodiment of the present invention, FIG. 2 is a partial cross-sectional side view of the display device, FIG. 3 is a rear view thereof, and FIG. FIG. 5 is a perspective view of a stopper means of a valve, FIG. 6 is a rear view of a display device showing another embodiment of the present invention, FIG. 7 is a side view thereof, and FIG. FIG. 9 is a longitudinal sectional view of a display device showing another embodiment, and FIG. 9 is a rear view thereof. 1 ... hull, 5,7 ... water injection pipe, 6 ... nozzle, 9 ...
Valve, 51 ... Water inlet side pipe, 52 ... Water injection side pipe, 71 ...
Injection port, 90 ... Valve shaft.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B63B 45/04 B63B 35/73

Claims (2)

(57) [Claims] 1. A water jet pipe having a smaller diameter than a nozzle is provided in a propulsion unit for generating a propulsion force and a turning force of a ship by sucking water from the bottom of the ship and jetting the water backward from a stern through a nozzle. One end opening of the water injection pipe is inserted into the rear end of the nozzle, the other end opening of the water injection pipe is opened so as to be directed above the water surface, and a valve for blocking water flow to the water injection pipe. A display device for a small jet propulsion boat, comprising: an opening / closing means for the valve; and an operating means for operating the opening / closing means is provided near an operation handle. 2. A water jet pipe having a smaller diameter than a nozzle is provided in a propulsion unit for generating a propulsive force and a turning force of a ship by sucking water from the bottom of the ship and jetting the water backward from a stern through a nozzle. One end opening of the water injection pipe is inserted into the rear end of the nozzle, and the water injection pipe is connected to the nozzle so that the other end opening can be changed between a state in which the opening is directed above the water surface and a state in which it is not directed above the water surface. A display device for a small jet propulsion boat, comprising: