JPH0741873B2 - Small jet propulsion boat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly relates to a small jet propulsion boat that is a single-seater and sails at high speed on the sea.

(Prior Art) In recent years, small jet propulsion boats which are engine-equipped small boats and are designed to slide on water have been widely used. This ship glides on the surface of the water and performs various operations (exercises) such as sudden start and sudden turn. In order to make the hull as small as possible, this ship shall have a structure in which an engine is arranged in the lower front part of the seat and the water injection means (flow passage and propeller) driven by this engine is arranged under the seat. Is preferred. However, when this configuration is adopted, there is a drawback that the work is extremely difficult to perform due to space limitations when inspecting and repairing the engine and the water injection means. Therefore, it is desired to adopt a structure that can be easily inspected and repaired without weakening the strength of the hull under such space restrictions.

(Object of the Invention) The present invention has been made to solve such a conventional problem, and inspects and repairs water jetting means in a small hull without reducing the strength of the hull. (EN) A small jet propulsion boat having a structure that can be easily carried out.

(Structure of the Invention) According to the present invention, a seat member is formed by projecting a deck member upward on the hull centerline, and a front handle on the front side of the seat base is provided with an operation handle and a front deck. A front opening that connects the front space surrounded by the ship bottom plate and the outside of the hull is formed, and a rear part that connects the rear space surrounded by the deck member and the ship bottom plate and the outside of the hull is formed on the upper surface of the seat base. An opening is formed, a seat is detachably installed on the upper surface of the seat base so as to cover the rear opening, and the front opening and the rear opening are communicated with each other through the front space and the rear space. It was made.

In the above-mentioned configuration, since the rear opening is formed under the removable seat, the water injection means and the engine can be easily inspected and repaired, and the rear opening is Since the deck member is formed on the upper surface of the seat base formed by projecting, the strength of the hull is not weakened even if the opening is formed.

Further, the front deck is formed with a front opening for communicating the front space with the outside of the hull, and the front opening and the rear opening are communicated with each other through the front space and the rear space. With respect to the water injection means and the engine arranged in the rear space, it is possible to reach and visually check both the front opening and the rear opening, and the workability of inspection and repair is excellent.

(Embodiment) In FIGS. 1 and 2, a hull 100 is surrounded by a bottom plate 20, an upper deck (front deck) 21 formed in front of the center of the hull, and a deck member behind it. A portion is configured to have a drainage volume, and a substantially enclosed engine room is formed in a portion surrounded by the bottom plate 20 and the upper deck 21. A seat 50 is formed so as to project from the center of the hull rearward in the center of the boat in the width direction.
A foot deck 30 that opens to the stern end is formed between the and the gunnels 88 on both sides. The foot deck 30 and the lower side of the seat 50 are also configured to have a drainage volume.

The base portion 38 of the seat is formed so as to stand upright from a foot deck 30, which is a deck member, and the seat 50 is detachably attached to the upper end portion thereof by an appropriate locking tool. An opening (rear side opening) 80 is formed below the seat 50 (upper surface of the base 38).

An openable and closable hatch 28, which is a part of the upper deck, is provided in the center of the hull in front of the seat 50. A handle support portion 61 is formed on the hatch 28 in a protruding manner, and a handle 60 is provided at the upper end portion thereof. The hatch 28 is formed so as to project, and an engine room 29 serving as a buoyancy space is formed below the hatch 28. Also, the person 11 on the seat 50 has his foot on the foot deck 30.
The hull 100 is operated by gripping the handle 60 in a state of being placed on the top, and the operator 11 stands up from this state and can move his / her weight forward, backward, left and right.

A propeller (not shown) is rotated by the engine 14 in the engine room 29 to suck water from the water suction port 32 at the bottom of the ship, and swings in the horizontal direction of the stern through the flow path 33 formed below the seat 50. The nozzle 34 is configured to jet water backward, and the water jetting means produces a turning force and a propulsive force. 15 is a fuel tank.

A hatch cover 28 of the engine room 29 is formed to project upward on the front side of the seat 50, and the hatch cover 28 can be opened and closed by a hinge 51 at the front end of the hatch cover 28 in front of the opening portion (front side opening portion) 27 of the upper deck 21. And a locking tool 52 for holding the closed state is mounted at the rear end. The locking tool 53 that locks with the locking tool 52 is an opening portion of the upper deck 21.
It is mounted on the rear side of 27.

In the above configuration, the opening 80 at the bottom of the seat is normally the seat 50.
Closed by the opening 27 above the engine compartment 29
Is closed by a hatch cover 28. When the engine 14 and the water injection means are to be inspected and repaired, the hatch cover 28 is rotated around the hinge 51 to open it as shown in FIG. 3, and the opening 80 is opened by removing the seat 50. In that state, the operator 11
By inserting a hand from the opening 80, a predetermined inspection from the rear end of the water injection means to the rear end of the engine,
Can be repaired. When working on the rear of the engine, the working position can be seen through the opening 27. The front side of the engine 14 may be inserted by inserting a hand through the opening 27.

As described above, since the opening 80 is formed on the lower side of the seat 50, the water injection means and the engine 14 can be easily inspected and repaired. Since it is reinforced by the base portion (upstanding wall) 33, the strength of the hull is not weakened.

(Effects of the Invention) As described above, in the configuration of the present invention, since the rear side opening is formed on the lower side of the removable seat, it is easy to inspect and repair the water injection means and the engine. Since the rear opening is formed on the upper surface of the seat base formed by protruding the deck member, the strength of the hull is not weakened even if the opening is formed.

Further, the front deck is formed with a front opening for communicating the front space with the outside of the hull, and the front opening and the rear opening are communicated with each other through the front space and the rear space. With respect to the water injection means and the engine arranged in the rear space, it is possible to reach and visually check both the front opening and the rear opening, and the workability of inspection and repair is excellent.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention, FIG. 2 is a schematic plan view thereof, FIG. 3 is a longitudinal sectional view showing a state of inspection and repair, and FIG. 4 is a IV-IV line of FIG. FIG. 100 …… hull, 11 …… pilot, 21 …… upper deck, 28…
… Hatch cover, 30 …… Foot deck, 33 …… Seat base, 50 …… Seat, 80 …… Opening.

Claims (1)

[Claims] 1. A seat base is formed by projecting a deck member upward on the centerline of a hull, and an operation handle is installed on the front deck on the front side of this seat base, and by the front deck and the bottom plate. A front opening that connects the enclosed space with the outside of the hull is formed, and a rear opening that connects the rear space surrounded by the deck member and the bottom plate with the outside of the hull is formed on the upper surface of the seat base. However, the seat is detachably installed on the upper surface of the seat base so as to cover the rear opening, and the front opening and the rear opening are communicated with each other through the front space and the rear space. A featured small jet propulsion boat.