JP3107422B2 - Drain drain structure of water jet propulsion boat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage structure for a water jet propulsion boat gliding on the water surface.

[0002]

2. Description of the Related Art In recent years, water jet propulsion boats that perform various types of motion by sliding on the water surface have become widely known. In this jet propulsion boat, a jet unit (propulsion unit) is disposed in a recess at the stern end at the bottom of the hull. Then, the impeller rotating in the flow passage formed in the jet unit sucks water from the bottom of the ship, and the water jet at the rear end of the flow passage swings about a vertical axis, thereby propelling the hull. And make a turn to glide on the water surface. Water that has entered the inboard compartment is drained out of the ship through a drain plug formed on the ship side outer plate as drain.

[0003]

However, in the above configuration, there is a problem that the water discharged through the drain plug contaminates the outer plate around the drain plug and deteriorates the appearance.
In addition, when draining is performed, the operation of attaching and detaching the drain plug is performed. However, there is also a problem that the operation of operating the drain plug provided on the ship side outer plate is very difficult from the ship.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional disadvantage, and it is intended to prevent the appearance from being deteriorated due to dirt around the drain plug and to easily operate the drain plug. It is an object of the present invention to provide a drain discharge structure that can perform the drainage.

[0005]

According to the present invention, a recess is formed at the bottom of the stern stern and is separated from the inboard compartment by a watertight wall and is opened rearward, and the jet unit is disposed in the recess. A drain outlet communicating with the inboard compartment is opened at a lower portion of the side wall of the recess, and a drain plug detachable from the recess side is provided at the drain outlet.

[0006]

In the above construction, since the drain is discharged through the drain plug provided in the drain outlet at the lower part of the side wall of the recess, which is the installation space for the jet unit, dirt around the drain plug cannot be seen from the outside. The appearance of the hull is not impaired by the dirt near the discharge port due to the drain.

Further, since the drain plug is disposed in the recess which is a closed space, there is no danger that an object may hit the drain plug during traveling and be damaged.

[0008]

1 and 2, a hull 1 of a water jet propulsion boat is provided with a driver's seat 21 on a cockpit floor 2 in the center and an operation handle 2 on the front side thereof.
2 are provided. On the lower side of the floor 2, a front section 51 is formed between the partition walls 81 and 82 at the front, a battery section 54 is provided at the center between the partition walls 82 and 85, and the partitions 83 and 84 are provided on both sides thereof. Side compartments 52 and 53 are formed through the engine compartment 3, and an engine room 3 is formed on the rear side in the center between the partition walls 85 and 88, and side compartments 50 and 55 are formed on both sides of the engine room 3 through the partition walls 86 and 87. Further, on the rear side, a recess 10 having a partition wall 88 and both side walls 40 as peripheral walls is formed, and side sections 56 and 57 are formed on both sides thereof. In the engine room 3, as shown in FIGS. 3 and 4, a pair of engines 30 are installed on engine beds 12, 13 formed on a bottom plate 11. A pair of jet units 31 each driven by 30 are arranged.

The drain of each section is discharged to the recess 10. That is, the drain of the front compartment 51 passes through the drain hole 41 formed in the partition
4 and the drain in the side sections 52 and 53 is
The drain of the battery chamber 54 is sent out to the engine room 3 through the drain hole 44,
The drains of the side sections 54 and 55 are sent out to the side sections 56 and 57 through drain holes 44 and 45 formed in the partition wall 88, and the drain of the engine room 3 is recessed through the drain plug 7 provided in the partition wall 88. The drain of the side sections 56 and 57 is discharged into the recess 10 through the drain plug 7 provided on the side wall 40.

As shown in FIGS. 5 and 6, the drain plug 7 has a plug body 74 and a holding body 7 for holding the same.
0, and the holding member 70 is a cylindrical portion 7 having an internal thread.
3 and its surrounding flange 71, and the plug body 7
4 has an external thread formed on the outer periphery thereof, an operation handle 79 formed at the tip protruding into the recess 10, and a retaining member 75 formed at the opposite end. The holding member 70 is screwed through a packing 72 into a screw 78.
The plug body 74 is attached to the side wall 40 by screwing an external thread of the outer peripheral portion of the plug body 74 to the female screw of the holding body 70, thereby opening and closing the drain outlet. Is formed.
The attachment of the drain plug 7 to the partition wall 88 is performed similarly.

The partition wall 88 and both side walls 40 forming the peripheral wall of the recess 10 are formed in a watertight structure, respectively.
The rear end of the cover 10 is opened rearward, and the cover 5 is provided on the upper wall so as to be rotatable around a hinge 59 so as to open and close an inspection port for the recess 10. A bilge pump 6 and a bilge outlet 61 for discharging the bilge in the engine room 3 into the recess 10 are provided on the side walls 40.

In the above configuration, during normal running, the drain is collected in the engine room 3 and the side compartments 56 and 57 through the drain holes 41, 42, 43, 44 and 45. When the hull 1 is unloaded, operations such as inspection and cleaning of the jet unit 31 are performed through the inspection port. In this operation, the drain may be discharged into the recess 10. That is, a person on the hull 1 opens the cover 5, inserts a hand into the recess 10 from the inspection port, and
By loosening the screw by grasping and rotating the operation handle 79, a gap is formed between the plug main body 74 and the holder 70 as shown by the imaginary line in FIG. 5, and the drain is discharged.

When the drain is discharged through the drain plug 7 disposed in the recess 10 as described above, the dirt near the discharge port accompanying the discharge of the drain is not visible from the outside of the hull 1. Does not impair the appearance. Further, when inspecting the jet unit 31 in the recess 10 through the inspection opening, the drain plug 7 may be opened and closed, so that the operation is easy, and the drain plug 7 is a closed space which is a closed space. Since it is arranged inside, there is no danger that an object may hit the drain plug 7 during traveling and be damaged.

[0014]

As described above, according to the present invention, since the drain is discharged through the drain plug provided in the drain outlet at the lower part of the side wall of the recess, which is the installation space of the jet unit, the drain is externally provided. The dirt around the drain plug is not visible, so that the dirt near the discharge port due to the drain does not impair the appearance of the hull. In addition, since the drain plug is disposed in the recess, which is a closed space, there is no danger that an object may hit the drain plug during traveling and be damaged.

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view of the vicinity of a bottom of a hull showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the hull.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a front view of a drain plug.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 2 Cockpit floor 3 Engine room 5 Cover of inspection port 7 Drain plug 10 Recess 11 Ship bottom plate 31 Jet unit 40 Side wall of recess

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B63B 13/00 B63H 11/00

Claims (1)

(57) [Claims] To 1. A stern vessel bottom portion, with partitioned on board compartment and watertight wall opened recess toward the rear is formed, the jet units are disposed in this recess, the
At the bottom of the side wall of the recess, there is a drain outlet that communicates with the ship compartment.
It is open, and this drain outlet is removable from the concave side
A drain drain structure for a water jet propulsion boat, wherein a drain plug is provided .