JP2000142582A - Steering device with auxiliary steering member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make easy mounting/demounting to/from a ship body for cost reduction by slidably fitting to an upper portion of an auxiliary shaft a steering means which is pivoted to an arm extending reaward from a steering shaft pipe holding a main steering member so as to be turnable by means of a mounting shaft and has an inverted U shape in section. SOLUTION: In a steering device with an auxiliary steering member an auxiliary steering member 12 is connected to a rear portion of a main steering member 10 by means of a connection shaft 14 so as to be bendable. A steering shaft 20 hanging the main steering member 10 is held so as to be turnable to a steering shaft pipe 18 mounted to a bottom of a ship body 16 to extend downward. Between the member 12 and the steering shaft pipe 18 a bending mechanism 22 to bend the member 12 is provided. The mechanism 22 is constructed of an arm 24 extending rearward from the pipe 18 and a steering means 28 connected to the arm 24 through a mounting shaft 26 so as to be turnable and interlocked with an upper portion of the member 12. Accordingly, a simplified structure and a reduced cost are attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A rudder with a sub rudder in which a sub rudder is connected to the rear part of the main rudder so as to be able to be bent is already known, for example, from Japanese Patent Publication No. 3-56959. When the rudder is turned, that is, when the main rudder is turned by a certain angle, the sub rudder refracts so as to have a certain angle with respect to the main rudder, so the lift increases. It has the feature that the maneuverability is enhanced.

On the other hand, since a refraction mechanism is required,
The structure tends to be complicated. This refraction mechanism generally has a box-shaped member attached to the upper part of the sub rudder, slidably accommodates the square member, and extends the square member from the rudder shaft tube holding the main rudder. Has a structure that is pivotally connected to the arm.

[0004]

Accordingly, a box-shaped member is required above the counter rudder, and the mounting accuracy of the box-shaped member with the counter rudder and the sliding accuracy with the square member are required. Mounting and removing man-hours also required a lot of cost, which was expensive. The present invention provides an inexpensive secondary rudder, which requires only a small number of members and can be easily attached to and detached from a hull.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention relates to a rudder with a sub-rudder in which a sub-rudder is connected to a rear part of the main rudder by a connecting shaft so as to be able to bend. Cross section inverted U pivotally attached to a brace extended from the shaft tube with a mounting shaft
A rudder with a sub-rudder, characterized in that a rudder-shaped rudder body is slidably fitted on the upper part of the sub-rudder.

According to the rudder with a sub-rudder, a box-shaped member is not required for the sub-rudder, so that the number of parts of the sub-rudder can be reduced.
Also, in the case of assembling, the rudder cutting body may be attached after the rudder is assembled, or the rudder cutting body may be attached in advance and the rudder may be assembled later, so that the degree of freedom in the assembling procedure is increased.

Further, the conventional box-shaped member has a shape like a sword sheath surrounding the four sides of the square member, and it is required to have a sufficient thickness (vertical height). According to the rudder cutting body structure of the present invention, since the lower side is open and covers the upper part of the sub rudder from above, the rudder can be easily attached and detached.

Further, the present invention provides a means in which a separate upper body is attached to the upper part of the above-mentioned auxiliary rudder, and a steering body is fitted to the upper body. According to this means, the timing of the mounting of the upper body,
Since it does not matter whether the rudder body is mounted before or after mounting, the degree of freedom of assembly is further increased.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a rudder with a sub rudder showing an example of the present invention. The rudder with a sub rudder is such that a sub rudder 12 is connected to a rear portion of a main rudder 10 by a connecting shaft 14 so as to be able to freely bend (rotate). (15 is a plane bearing). And the hull 1
A rudder shaft 20 for suspending and supporting the main rudder 10 is rotatably held on a rudder shaft tube 18 having a lower end partially protruding from the shaft 6. A refraction mechanism 22 for refracting the sub rudder 12 is provided between the sub rudder 12 and the rudder shaft tube 18.

FIG. 2 is a side view of the bending mechanism 22, FIG. 3 is a plan view, and FIG. 4 is a cross-sectional view. The bending mechanism 22 includes a brace 24 extending backward from the rudder shaft tube 18 and a brace 24. On the other hand, it is constituted by a steering body 28 which is rotatably connected by an attachment shaft 26 and is linked to the upper part of the sub rudder 12.

In the case of this embodiment, an upper structure 12a wider than the sub rudder 12 is formed on the upper part of the sub rudder 12 (generally, a separate one is welded), and a convex portion 30a and a bottom portion are formed. 3
0b and a plurality of bolts 3
It is fixed at 6. The upper structure 12a and the upper body 30
A positioning mechanism 38 composed of a concave portion and a protrusion fitted into the concave portion is provided on the mating surface of the two to secure an accurate mounting position. However, the above is an example, and the cross section of the upper part of the sub rudder 12 may be directly formed in a convex shape.

The rudder cutting body 28 includes two side bodies 28a and an upper bridge 2
8b, the cross section has an inverted U-shape, and both side bodies 28a are assembled to both side surfaces of the convex portion 30a of the upper body 30 so as to be slidably held on the inner side surfaces thereof. In the case of this example, the bottom surface of the steering body 28 (both sides 28a) is also slidably contacted with the upper surface of the bottom 30b of the upper body 30 to support the weight.

In addition, in this embodiment, sliding surfaces 32 and 34 made of metal or resin are respectively provided on the sliding surfaces of the inner side surface and the bottom surface of the rudder turning body 28 with respect to the upper body 30 over the entire sliding surface. It is interposed across. By doing so, the sliding support member 32,
The surface pressure of No. 34 decreases, and the sliding resistance decreases and the durability becomes excellent.

FIG. 5 is an explanatory view showing the operating state of the rudder with a sub-rudder. When the main rudder 10 rotates, the sub-rudder 12 moves to the connecting shaft 1.
4 to rotate in the direction to increase the angle of cut.
The sub rudder 12 is configured to rotate 90 ° with respect to the traveling direction with respect to the maximum turning angle 45 ° of the main rudder 10. As a result, the lift is increased, and high maneuverability is obtained.

[0015]

As described above, according to the rudder with a sub-rudder according to the present invention, the rudder cutting body only needs to be slidably covered on the sub-rudder (upper body). In addition, the precision can be reduced, and the manufacturing cost can be reduced. Further, since the vertical height between the rudder cutting body and the sub rudder can be kept low, the rudder can be extended upward and the rudder area can be increased accordingly.
Furthermore, since there is a degree of freedom in the assembly order of the refraction mechanism,
As a result, assembly costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a rudder with a sub rudder showing an example of the present invention.

FIG. 2 is a side view of a bending mechanism of a rudder with a sub rudder showing an example of the present invention.

FIG. 3 is a plan view of a bending mechanism of a rudder with a sub rudder showing an example of the present invention.

FIG. 4 is a sectional view of a bending mechanism of a rudder with a sub-rudder showing an example of the present invention.

FIG. 5 is an explanatory diagram of an operation state of a rudder with a sub rudder showing an example of the present invention.

[Explanation of symbols]

 Reference Signs List 10 Main rudder 12 Secondary rudder 14 Connecting shaft 18 Rudder shaft tube 24 Arm bar 26 Mounting shaft 32 Sliding bearing surface material 34

Claims (4)

[Claims] 1. A rudder with a sub-rudder having a sub-rudder connected to a rear part of the main rudder by a connecting shaft so as to be able to bend, with a mounting shaft pivotally attached to a brace extending from a rudder shaft tube for rotatably holding the main rudder. A rudder with a sub-rudder, wherein a rudder cutting body having an inverted U-shaped cross section is slidably fitted on the upper part of the sub-rudder. 2. A separate upper body is attached to the upper part of the side rudder,
The rudder with a secondary rudder according to claim 1, wherein a rudder cutting body is fitted to the upper body. 3. An upper or upper body of the secondary rudder, wherein the upper or upper body of the secondary rudder has a convex cross section, and an inner side surface and a bottom surface of the steering body are brought into sliding contact with the upper or upper body of the secondary rudder. A rudder with a secondary rudder according to the above. 4. The rudder with a sub-rudder according to claim 1, wherein a sliding support member is provided on the sliding surface between the rudder cutting body and the upper part of the rudder or the upper body over the entire length.