JPH0632290A - Helm at vessel - Google Patents

Abstract

PURPOSE:To change the motion of a hull from forward motion to backward motion without reversing a propeller by fitting to the front end edge and the rear end edge of a main rudder auxiliary rudders so as to be able swing freely around a perpendicular axis center, providing at the same time a swing device to swing these respective auxiliary rudders in regard to the main rudder. CONSTITUTION:The direction of a water current from a propeller 2 is changed by 90 degrees by means of a main rudder 4, and at the same time the water current runs out toward a bow side due to both auxiliary rudders 7, 8. Accordingly, a hull 1 is gradually decelerated, and stopped, and then, enters into the state of backward motion. That is, without reversing the propeller 2, a vessel can be put into the state of stop or backward motion from the state of forward motion. Respective link mechanisms 9, 10 are regulated so that the swing angles of the auxiliary rudders 7, 8 may become at all times 1/3 in regard to the swing angle of the main rudder 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rudder in a ship.

[0002]

2. Description of the Related Art A so-called flap-equipped rudder having a movable rear portion has been known in order to improve the steering performance of a ship.

This flap-equipped rudder includes, for example, a Becker rudder, which is excellent in turning performance and course stability. As shown in FIG. 4, this Becker ladder is provided with a flap 55 on a rear end edge of a rudder main body 54 connected to a rudder shaft 53 at a rear portion of a hull 51 and at a position behind the propeller 52.
However, the flap 55 and the rudder shaft 53 are connected to each other via a link mechanism 56 while being swingably attached about the vertical axis.

[0004]

According to the conventional rudder with flaps described above, when the course is changed during forward movement, the steering performance and stability are certainly improved, but when the hull is moved backward, I had to reverse the propellers.

Therefore, an object of the present invention is to provide a rudder in a ship which can switch the hull from forward to reverse without rotating the propeller in reverse.

[0006]

In order to solve the above-mentioned problems, a rudder in a ship according to the present invention is provided with a main rudder plate at a position behind a propeller of a hull via a rudder shaft, and a front end edge and a rear end of the main rudder plate are provided. An auxiliary rudder plate is attached to the edge so as to be swingable around a vertical axis, and a swinging device for swinging each of these auxiliary rudder plates with respect to the main rudder plate is provided.

[0007]

According to the above construction, the auxiliary rudder plate is swingably attached to the front and rear end edges of the main rudder plate, so that the main rudder plate is swung at an angle of 90 degrees with respect to the propeller shaft center, and both sides are swung. By swinging the auxiliary rudder blade toward the propeller side, the water flow from the propeller can be directed toward the bow side.

Therefore, the vessel can be switched from forward to stop or from forward to reverse without reversing the propeller.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 and 2, reference numeral 1 is a hull, and a main rudder blade 4 is attached to a rear portion of the hull and at a position behind the propeller 2 via a rudder shaft 3, and the main rudder blade 4 is also attached.
Front and rear auxiliary rudder blades 7 and 8 are attached to the front and rear end edges of the vehicle through a hinge member such as mounting shafts 5 and 6 so as to be swingable about a vertical axis.

Further, swinging devices for swinging the auxiliary rudder plates 7 and 8 with respect to the main rudder plate 4, for example, link mechanisms 9 and 10 are provided. In addition, this link mechanism 9,
Reference numeral 10 indicates a structure in which a link member is provided, for example, between the auxiliary rudder plates 7 and 8 and the rudder shaft 3, and the auxiliary rudder plates 7 and 8 swing in a predetermined direction in accordance with the rotation of the rudder shaft 3. It is what is done.

Further, end plates 11 and 12 are attached to the upper and lower ends near the outer edges of the auxiliary rudder plates 7 and 8, respectively, and the lift forces acting on the rudder are increased by the end plates 11 and 12. As a result, the controllability of the rudder is improved, and the vortices generated from the edge portions of the auxiliary rudder blades 7 and 8 can be reduced.

According to the above construction, when the boat moves forward, the main rudder plate 4 may be straightened along the bow-stern direction, or when the boat is desired to be oriented in a predetermined direction, the main rudder plate 4 may be moved. If the front auxiliary rudder blades 6 are swung in the same direction through the link mechanisms 9 and 10 when swung in that direction by a predetermined angle, the performance as a rudder with flaps can be exhibited.

Then, when the ship is to be moved backward, as shown in FIG.
As shown in FIG.
When tilted at an angle of degrees, the link mechanisms 9 and 10 cause the auxiliary rudder blades 7 and 8 to face each other, that is, the propeller 2
It swings to the side at an angle of about 30 degrees.

Then, the water flow from the propeller 2 is changed in direction by 90 degrees by the main rudder blade 4 and flows out toward the bow side by both the auxiliary rudder blades 7 and 8. Therefore, the hull 1 gradually slows down, and after stopping, enters the reverse state.

That is, the vessel can be brought from the forward traveling state to the stop or reverse traveling state without reversing the propeller. In each of the link mechanisms 9 and 10, the swing angle of the auxiliary steering plates 7 and 8 is always 1 / the swing angle of the main steering plate 4.
It has been adjusted to be 3.

That is, when the main rudder blade 4 is swung by 60 degrees, the auxiliary rudder blades 7, 8 are swung sideways facing each other at an angle of 20 degrees, so that the main rudder blade 4 is swung. Is 9
When the auxiliary rudder blades 7, 8 are swung by 0 degree, the auxiliary rudder blades 7, 8 are swung toward the propeller 2 side at an angle of 30 degrees, as described above.

[0017]

As described above, according to the structure of the present invention, since the auxiliary rudder blades are swingably attached to the front and rear end edges of the main rudder blade, the main rudder blade has an angle of 90 degrees with respect to the propeller shaft center. By swinging and swinging both auxiliary rudder plates to the propeller side, the water flow from the propeller can be directed to the bow side, and therefore the ship can be stopped from forward or stopped from forward without reversing the propeller. Can be switched to.

[Brief description of drawings]

FIG. 1 is a side view of a rudder according to an embodiment of the present invention.

FIG. 2 is a view taken along the line BB of FIG.

FIG. 3 is a view corresponding to the arrow B-B for explaining the operation of the rudder in the embodiment.

FIG. 4 is a side view of a conventional flap-equipped rudder.

[Explanation of symbols]

 1 Hull 2 Propeller 3 Rudder axle 4 Main rudder plate 7 Front auxiliary rudder plate 8 Rear auxiliary rudder plate 9, 10 Link mechanism

[Procedure amendment]

[Submission date] September 1, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

According to the above construction, when the boat moves forward, the main rudder plate 4 may be straightened along the bow-stern direction, or when the boat is desired to be oriented in a predetermined direction, the main rudder plate 4 may be moved. If the auxiliary rudder blades 7 and 8 are swung in the same direction through the link mechanisms 9 and 10 by swinging in that direction by a predetermined angle, the performance as a rudder with flaps can be exhibited.

Claims (1)

[Claims] 1. A main rudder plate is provided at a position behind a propeller of a hull via a rudder shaft, and auxiliary rudder plates are attached to front and rear end edges of the main rudder plate so as to be swingable about a vertical axis. ,
A rudder for a ship, comprising a swinging device for swinging each of these auxiliary rudder blades with respect to the main rudder blade.