JPH0645440Y2 - Ventilation structure of engine room for small planing boat - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a structure of a ventilation passage in an engine room of a small planing boat.

[Prior Art] The hull has a relatively short, wide and shallow overall shape,
An engine room defined by a deck and a hull is provided in the approximate center of the hull, and a small planing boat is proposed that sits on a seat provided at the upper part of the engine room and steers the boat.

In this type of small planing boat, the hull of the hull is large up and down, and there are many occasions when it is exposed to water.

Therefore, as a ventilation path structure for the engine room defined by the deck and hull, in order to prevent the intrusion of seawater etc. as much as possible, a vent should be opened rearward at the stern, or seawater etc. Various measures such as installing a louver to make it hard to enter, making the ventilation port part a good drainage, and making the ventilation path leading to the engine room meandering so that water can be drained on the way Has been done. (As a prior art, there is a utility model No. 2-72197.) [Problems to be solved by the invention] By the way, in the conventional ventilation passage structure described above, a structure is required to prevent intrusion of seawater or the like into the ventilation passage. However, the meandering of the ventilation path has a difficulty in securing an installation space in the ship.

The present invention has been made in view of the above-mentioned points, and provides a passage structure for an engine room ventilation of a small planing boat, which has a simple structure and has an improved function of preventing intrusion of seawater or the like into the ventilation passage at the vent hole portion. The purpose is to do.

[Means for Solving the Problems]

In order to achieve the above object, the gist of the present invention is that in a small planing boat in which the hull has a shallow box shape and is located in the approximate center of the hull and defines an engine room, An engine room is defined by a hull, the engine room is opened to the outside of the vessel through a ventilation pipe, the upper end of the ventilation pipe is attached in a protruding manner upward, and the upper end of the ventilation pipe is opened. An engine room ventilation path structure for a small planing boat is characterized in that an annular floating body that opens and closes a gap formed between the deck and a deck or a lid integrally provided on the deck is fitted.

[Action]

When seawater, etc., enters the aeration chamber and temporarily accumulates,
A floating body fitted to the upper end portion of the ventilation pipe floats on this and raises the apparent upper end opening position of the ventilation pipe to prevent intrusion of seawater or the like into the ventilation pipe.

When seawater that exceeds a certain amount of water enters the ventilation chamber, the floating body floats on this and the top surface of the floating body contacts the deck or the lid integrally provided on the deck to close the gap between the upper opening of the ventilation pipe and the inside of the ventilation pipe. Prevents the intrusion of seawater, etc.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of the rear part of a small planing boat, and FIG. 2 is a vertical cross-sectional view of the main part of the present invention.

In the figure, reference numeral 1 denotes a hull of a small planing boat, which has a box shape with a wide and shallow overall shape, and a cabin 2 is formed by a deck 3 and a hull 4.

Reference numeral 5 denotes an engine room provided in the cabin 2 at a substantially central portion of the hull 1. The engine room 5 is defined by a deck 3 and a hull 4, and a driver's seat 6 is provided at an upper portion thereof.

Reference numeral 7 denotes a ventilation passage for performing ventilation in the engine room 5. The ventilation passage 7 defines a ventilation chamber 8 inside the deck 3 at the stern part, and has a ventilation port 9 for taking in outside air into the ventilation chamber 8. The upper end 12 of the ventilation pipe 11 having the lower end opened to the engine room 5 is attached to the ventilation chamber bottom plate 10 in a protruding manner upward, and the ventilation pipe is opened at the upper end 12 of the ventilation pipe.
A gap 14 is formed between 13 and the deck 3.

Reference numeral 15 denotes an annular floating body that is vertically movably fitted in the ventilation pipe upper end portion 12 in the ventilation chamber 9 and that opens and closes the gap 14.
Shows the upper end of the ventilation pipe at the highest position as shown by the chain line in Fig. 2.
The height is set so that the top surface contacts the deck 3 without pulling out from 12.

Reference numeral 16 in the drawing denotes a louver attached to the ventilation port 10. In addition, the ventilation chamber bottom plate 10 is inclined low on the ventilation port 9 side so that the seawater that has entered the ventilation chamber 9 naturally flows out from the ventilation port 9 to improve the drainage.

Further, in the above embodiment, the vent pipe opening 13 and the deck 3 are
Although a gap 14 is formed between them, as shown in FIG. 3, in order to guide the floating body 15 and smooth its movement, the ventilation pipe upper end 12 is extended to the deck 3 to correspond to the gap 14. The ventilation hole 17 may be provided in the portion to be opened.

In the above configuration, when seawater or the like enters the ventilation chamber 8 and the floating body 15 fitted to the ventilation pipe upper end portion 12 floats, the gap 14 between the decks 3 is reduced in proportion to the floating height of the floating body 15. Moreover, when seawater or the like exceeding the predetermined amount of water enters the ventilation chamber 8 and the upper surface of the floating body contacts the deck 3, the gap 14 is closed.

However, the operation of the floating body 15 is extremely temporary, and the gap 14 is usually opened to allow sufficient ventilation for the ventilation of the engine room 5, which affects the ventilation of the engine room 5. Never give.

〔effect〕

As described above, in the present invention, the annular floating body that opens and closes the gap between the decks is fitted to the upper end of the ventilation pipe in the ventilation chamber, so that the following effects are achieved.

(A) Since entry of seawater or the like into the ventilation passage can be significantly reduced, it becomes possible to enlarge the cross-sectional area of the ventilation passage and increase the ventilation amount.

(B) The floating body operates by floating on seawater or the like entering the ventilation chamber,
Since it does not require power or the like, it can be easily applied and is advantageous in terms of setting the position of the vent hole with respect to the hull.

(C) Seawater entering the ventilation chamber is automatically drained to the outside of the ship during the operation of the floating body. Therefore, the drainage is good, and the ventilation path is shortened as much as possible to effectively use the inboard space.

[Brief description of drawings]

FIG. 1 is a rear perspective view of a small planing boat, FIG. 2 is a longitudinal sectional view of an essential part of the present invention, and FIG. 3 is a longitudinal sectional view of an essential part showing another embodiment. 1 ... Hull, 2 ... Cabin, 3 ... Deck, 4 ... Hull, 5 ... Engine room, 6 ... Driver seat, 7 ...
Ventilation path, 8 ... Ventilation chamber, 9 ... Ventilation port, 10 ... Ventilation chamber bottom plate, 11 ... Ventilation pipe, 12 ... Ventilation pipe upper end part, 13 ... Ventilation pipe upper end opening, 14 ... Gap, 15 …… Annular floating body, 16 …… Louver, 17 …… Vent hole.

Claims (1)

[Scope of utility model registration request] 1. A small planing boat having a shallow hull-shaped hull, which is located approximately in the center of the hull and defines an engine room,
An engine room is defined by a deck and a hull that form a hull, the engine room is opened to the outside of the ship through a ventilation pipe, and the upper end portion of the ventilation pipe is attached so as to project upward. An engine room ventilation path structure for a small planing boat, characterized in that an annular floating body for opening and closing a gap formed between the upper end opening of the ventilation pipe and the deck or a lid integrally provided on the deck is fitted.