JP2899767B2 - Ship rudder mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION I. Objects of the Invention (1) Field of Industrial Application The present invention relates to a rudder mechanism for a marine vessel provided on the stern side of the marine vessel for reducing the resistance of the rudder to water flow when the marine vessel is moving forward. In addition, the present invention relates to a rudder mechanism for a ship that can stably run the ship even in a strong wind or in an area of a fast tidal current.

Conventionally, as a rudder provided on the stern side of a ship, for example, a rudder shaft, which is provided behind a propeller unit and is vertically pivotally supported at a stern end, and is fixedly rotated at the rudder shaft end. It has been known to provide a rudder blade and obtain a desired steering angle by rotating a rudder shaft manually or by a motor. However, in this conventional rudder, the mounting position itself of the rotating shaft itself is fixedly disposed behind the propeller portion, and partially blocks and obstructs the water flow swirled backward by the propeller portion when the ship advances. In particular, when the vehicle is traveling at full speed in the open sea where sharp rudder operation is not performed,
The resistance of the rudder increased, which reduced propulsion efficiency and fuel efficiency. In view of this, the applicant has disclosed in Japanese Patent Application No. 1-511197, a propeller section provided at the lower end of the center of the stern of a vessel, provided near the retreating direction of the vessel, and connected to a rudder shaft and the other end of the rudder shaft. An idler shaft portion, and a rudder blade disposed behind the propeller portion of the ship and fixed to the idler shaft portion, wherein the idler shaft portion and the rudder blade rotate in the backward direction of the ship. As far as possible, a rudder mechanism for a ship provided with a free-rotating rudder forming a free-rotating wing portion has been proposed. In this proposal, the idler wing is connected to the end of the rudder shaft via the idler shaft, and when the ship is running, the idler wing is rotated in the retreating direction of the ship by the water flow pushed behind the propeller. Let
The propulsion efficiency and fuel efficiency of the ship are improved by preventing the rudder wing from being located immediately behind the propeller section.

During the voyage of the ship, the ship rotates and retracts from immediately behind the propeller unit, and performs a steering angle operation on a rudder wing part of which is submerged in water.

(3) Problems to be Solved by the Invention However, according to the rudder mechanism of the ship, while the ship is running, the ship turns from immediately behind the propeller unit and retreats, and partly submerges in the water. The rudder angle is controlled by the rudder part, which is good for calm days and when there is not much tidal current. However, there is a problem that the rudder is difficult to work when the wind is strong or the tidal current is fast. .

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to attach a flat plate for stabilizing a course to a ship provided with idle steering or separately attach an auxiliary rudder to the ship. It is an object of the present invention to provide a rudder mechanism for a ship that can stably and effectively perform steering even in a strong windward area or a fast-tidal current area while improving propulsion efficiency and fuel efficiency.

II. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a structure in which the propeller unit 20 provided at the lower center of the stern of the ship is provided closer to the retreating direction of the ship. A rudder shaft 22, an idler shaft portion 24 connected to the other end of the rudder shaft 22, and a rudder blade 26 disposed behind the propeller portion 20 of the ship and fixed to the idler shaft portion 24. In the rudder mechanism of the ship provided with the idler 14 forming the idler wing section 28, the propeller shaft 24 and the rudder wing 26 are rotatable in the backward direction of the ship. A flat plate for stabilizing the course at approximately the side end of the screw 20a of the part 20 and downward from the bottom 16 of the ship
It is composed of a rudder mechanism 10 of a ship, characterized in that 18 is erected.

In addition, a propeller section provided at the lower end of the center of the stern of the ship
The rudder shaft 22, a free shaft portion 24 connected to the other end of the rudder shaft 22, and a rear shaft portion of the ship, A rudder 26 fixed to the shaft portion 24, and the idler shaft 14 and the rudder blade 26 form an idler wing portion 28 so as to be rotatable in the backward direction of the ship. In the rudder mechanism of a marine vessel equipped with a rudder mechanism of a marine vessel, an auxiliary rudder 52 consisting of a normal rotary rudder is attached in parallel with the idler 14 at substantially the side end of the screw 20a of the propeller unit 20 in parallel with the rudder. Is done.

The auxiliary rudder may be arranged immediately before or close to the screw of the propeller section.

A link mechanism 58 may be provided for synchronously rotating the rudder shaft 22 of the idler 14 and the rudder shaft 54 of the auxiliary rudder 52 around the axis.

The rudder 26 of the idler 14 and the rudder 56 of the auxiliary rudder 52 may be provided in opposite directions.

Further, the rudder shaft 54 of the auxiliary rudder 52 is located on the propeller axis 100 of the propeller unit 20 in the ship forward direction from the screw 20a of the propeller unit 20, and the rudder shaft 2 of the idler 14
Reference numeral 2 denotes a projection plane S in the ship retreating direction which is contoured by the rotation locus of the screw 20a of the propeller unit 20, and
The propeller unit 20 may be disposed at a position displaced laterally from the propeller axis 100.

(2) Action When the course stabilizing flat plate is fixed outside the idler steering, the rudder wing is retracted from the projection surface in the backward direction of the ship, which is contoured by the rotation trajectory of the screw while the ship is propelled by the idler steering. Significantly improve ship propulsion efficiency and fuel efficiency. At the same time, the flat plate that stands on the bottom of the propeller section on the side of the vessel functions as a resistance plate against water flow and wind, thereby preventing the entire vessel from being washed away by tide and wind. To improve steering. In addition, when an auxiliary rudder consisting of a normal rotary rudder is attached in parallel with the idler to the side of the propeller screw near the ship in addition to the idler,
The rudder wing of the auxiliary rudder can be set at an arbitrary angle by operating the rudder rod according to the standard or the like and while the ship is running.

By providing a link mechanism for synchronously rotating the rudder axis of the idle rudder and the rudder axis of the auxiliary rudder around the axis, the idle rudder,
In addition, the rotational drive of the rudder of the auxiliary rudder can be performed by one drive system. In particular, the rotational torque of both rudder shafts is reduced by providing the idler rudder and the auxiliary rudder in opposite directions. By generating such a couple, the driving force and the fuel efficiency of the two rudder shafts are improved.

(3) Embodiment Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show a first embodiment of a rudder mechanism for a ship according to the present invention.

FIG. 1 is an enlarged side view of a main part of a rudder mechanism 10 of a ship according to an embodiment.
In addition to having an idler 14 at the lower center of the stern 12 of the ship,
The side bottom of the ship bottom 16 has a flat plate 18 for stabilizing the course.

FIG. 2 is a perspective view of a main part of the idler 14, and the idler 14 is
A rudder shaft 22 provided near the ship retreating direction with respect to the propeller unit 20 and rotatably supported by a support bearing provided at a lower end of a stern (not shown), and a free-wheel connected to the other end of the rudder shaft 22. A shaft portion 24, disposed behind the propeller portion 20 of the ship,
And a rudder blade 26 fixed to the idler shaft portion 24.
The idler shaft portion 24 and the rudder blade 26 are formed by forming an idler blade portion 28 so as to be rotatable in the backward direction of the ship.

In the figure, a support bearing (not shown) is provided at the lower end of the stern 12.
Is rotatably supported in the circumferential direction at one end.
And is connected to the idler wing section 22 via the.

As shown in FIG. 3 to FIG. 8, in the present embodiment, the free rotation shaft portion 24 includes a protruding portion 30, a protruding portion receiving portion 32 for fitting the protruding portion 30 to the male and female, and a fitting state of these. And an idle shaft 34 for freely inserting the two. The projecting piece 30 is provided so as to be connected to and protrude from the lower end of the rudder shaft 16 and has a projecting piece receiving section 32.
Are provided on the idler blade 28 side. And the projecting piece receiving part
The protrusions 32 are formed so as to protrude to both sides so as to form a fitting groove 36 in which the protruding pieces 30 are inserted. As shown in the figure, the protruding piece portion 30 is composed of a substantially circular plate 36 having one circular arc surface connected and fixed to the center of the lower end of the rudder shaft 22, and the circular plate 38 has a radius A protruding portion 40 protruding in the direction is formed. And
The projecting portion 40 has a regular surface 42 formed in the longitudinal extension direction of the support bearing and facing the retreating direction of the boat.
The restricting surface 42 comes into contact with the base portion 44 of the projecting piece receiving portion 32 to restrict the rotation of the idler wing portion 28 from the vertical state to the ship forward direction. In this case, the projecting piece receiving part 32 may be provided on the support bearing side of the rudder shaft 22, and the projecting piece part 30 may be provided on the idler wing part 28 side, but in consideration of the resistance to water flow, the weight of the disc, and the like. As described above, it is more reasonable to provide the projecting piece 30 on the support bearing side of the rudder shaft 22, and to provide the projecting piece receiving section 32 on the idler wing 28 side.

As shown in FIGS. 2, 5 and 7, the base 38a of the disc 38 of the protruding piece 30 is formed in a V-shaped side surface and abuts against the end 32a of the protruding piece receiving part 32. And a first end surface 46 facing downward to regulate the circular rotation of the idler wing portion 28 from the vertical state to the ship forward direction together with the regulation surface 42, and the projecting piece receiving portion 32
A second end surface 48 is provided for restricting the rotation position of the idler wing portion 28 in the maximum ship retreating direction (counterclockwise direction) by abutting against the end portion 32b of the motor.

Here, the rotation of the idler wing portion 28 from the vertical state to the ship forward direction is performed by the regulating surface 42 of the projecting portion 40 and the base portion 44 of the projecting piece receiving portion 32.
And the contact between the first end surface 46 of the base 38a of the disc 38 and the end 32a of the projecting piece receiving portion 32, and the rotation of the projecting piece receiving portion 32 End 32b and second end face 4
8 will be regulated.

The production of the protruding piece part 30 and the protruding piece receiving part 32 is easier,
In addition, the rotation of the idler wing portion 28 in the ship retreating direction can be reliably restricted.

Here, when the ship is moving forward, the idler wing portion 22 is gradually rotated around the idler shaft portion 20 toward the retreating side of the ship by the water flow pushed backward by the propeller portion. Then, for example, when the ship is moving forward at full speed, there are no obstacles in the water flow for generating thrust of the ship immediately after the propeller section, so that the ship propulsion efficiency and the fuel efficiency can be improved.
At this time, the rotation of the idler wing portion from the vertical state in the ship retreating direction is regulated by the regulating surface 42, and the idler wing portion 28 does not rotate in the ship forward direction after being in a linear state with the rudder shaft 22. It is supposed to be.

What is characteristic in the first embodiment of the present invention is that in the rudder mechanism of a marine vessel provided with the idler 14,
As shown in FIGS. 9 and 10, the screw 20a of the propeller unit 20
Is provided with a course stabilizing plate 18 substantially at the side end of the ship and below the bottom of the ship. This flat plate 18 is wooden,
Made of metal, plastic, etc. with excellent rigidity,
It is fixed in a slightly counterclockwise direction with respect to the direction of travel of the ship in plan view, but its mounting angle and position are arbitrary at substantially the side end of the ship.

In the case of a ship provided with a screw that rotates counterclockwise when moving forward, the ship may be inclined clockwise or may be provided in parallel with the traveling direction. With this, the flat steering wheel 18 serves to improve the ship propulsion efficiency and fuel efficiency by means of the idle steering 14, and at the same time the flat plate 18 functions as a resistance plate against wind and tidal currents, and the steerability is stable even in a strong leeward or fast tidal current area. It is something that is done effectively. This flat plate is effective for steering in the case of a small boat of, for example, about 6 to 7 tons or less.

Next, the operation of the idler 14 of the rudder mechanism 10 of the boat according to the first embodiment will be described. Now, when the boat is stationary, the idler wing 28 of the idler 14 is at the position shown by the solid line in FIG. It is in.
Next, when the propeller unit 20 is driven to move the ship forward, the idler wing portion 28 gradually arcs in the direction of arrow a (the ship retreating direction) through the idler shaft portion 24 by the water flow pushed by the propeller portion. At last, the idler wing portion 28 is displaced to the position indicated by the dashed line A at the time of forward rotation at full speed. At this time, a part of the rudder blade 26 is submerged in the water, thereby performing a steering operation. Therefore, as shown in the dashed line in Fig. 1, there is no obstacle obstructing the water flow immediately after the propeller unit 20 when moving forward, and the thrust of the propeller unit 20 is fully utilized to propel the ship and improve fuel efficiency. Will be done. In other words, the propeller propulsion by the amount of the resistance due to the presence of the wings of the conventional rudder makes the amount pushed down backward and the accompanying pushing force stronger, and as a result, the hull rises by that much,
The synergistic effect significantly increases the ship speed and fuel efficiency.

According to experiments, it has been confirmed that when the rudder mechanism according to the present invention is used for a conventional rudder, the fuel efficiency is improved by 20% to 30% or more. Furthermore, in terms of the propulsion efficiency of the ship, it maintains approximately twice the speed under the same prime mover conditions as compared with the conventional type,
It has been experimentally proved that a sprinting run can be performed at full speed.

In this way, a gentle steering operation is sufficient, and particularly in the open sea where full-speed operation is preferable,
The idle rotation of the idler wing portion 28 in the ship retreating direction is effective.

Next, when the ship calls at a port or the like, the speed of the ship decelerates, and at this time, the water flow of the propeller section 20 weakens, and due to the weight of the rudder 26, the idler wing section 28 gradually rotates in an arc toward the underwater side. ,
It corresponds to a case where the vehicle gradually returns to the position shown by the solid line in FIG.

At this time, the rotation of the idler wing portion 28 from the vertical state to the ship forward direction is caused by the contact between the regulating surface 42 of the projecting portion 40 and the base portion 44 of the projecting piece receiving portion 32, and the base portion 38a of the disc 38 Is restricted by the contact between the first end surface 46 and the end 32a of the projecting piece receiving portion 32, and the rotation in the retreating direction of the ship is prevented by the contact between the end 32b of the projecting piece receiving portion 32 and the second end surface 48. Regulated by contact.

Here, in the case where rapid steering operation is not performed when full-speed forward movement is required, the idler wing part 28 is partially immersed in the water and is not located immediately behind the propeller part 20; Sometimes, it is located automatically behind the propeller unit 20 so that a sufficient steering operation can be performed.

In this way, when the idler 14 is attached to a ship, the rudder is strongly affected by the wind and the tidal current because only a part of the rudder wings is submerged in the water during the propulsion of the ship in a strong wind area or an area where the tidal current is fast. Was deteriorating.

In the present embodiment, when the course stabilizing plate 18 is fixed in addition to the idler 14 as described above, a projection surface in the backward direction of the ship, which is contoured by the rotation trajectory of the screw 20a while the ship is propelled by the idler. The rudder 26 is retracted from S to greatly improve the propulsion efficiency and fuel efficiency of the ship, and at the same time, the entire ship is swept away by the tide and wind by the flat plate 18 that is outside the projection plane S and is submerged in the water. And to improve steering performance.

In particular, as in the case of the embodiment, when fixed by inclining counterclockwise with respect to the traveling direction, it is effective in the case of a right-turning screw during cruising, and effective in the case of a left-turning screw in the traveling direction. It may be fixed by tilting clockwise.

Next, a second embodiment of the rudder mechanism of the present invention will be described with reference to FIGS. 11 to 13.

In the present embodiment, in addition to the idler 14, the screw 20a of the propeller unit 20 is moved from the normal rotary rudder to the substantially ship side end (the right side as viewed from the stern side in the figure) in parallel with the idler. The auxiliary rudder 52 is attached. The auxiliary rudder 52 rotatably supports a rudder shaft 54 on a bearing provided on the main body side of the ship (not shown), and a rudder wing 56 is fixed to an end of the rudder shaft 54 so as to be always submerged in the water. A rudder rod is provided at the other end of the rudder shaft on the ship's side so as to be rotatable only in the direction around the longitudinal axis of the rudder shaft 54 to perform a steering angle operation. The rudder shaft of this auxiliary rudder 52 is formed smaller than that of the idler rudder 14. Auxiliary rudder
52 may be provided at any position in both sides of the ship, and may be provided on the left side unlike the embodiment.

This makes it possible to set the optimum left and right drifting prevention angles in order to prevent the entire vessel from being washed away by the wind or the tidal current in accordance with the ship type, the standard, and the like of each ship.

14 and 15 show a rudder mechanism for a ship according to the present invention.
10 shows a third embodiment. In this embodiment, a link mechanism 58 is provided for synchronously rotating the rudder shaft 22 of the idler 14 and the rudder shaft 54 of the auxiliary rudder 52 around the axis. ing. The rudder 26 of the idler 14 and the rudder 56 of the auxiliary rudder 52 are provided in opposite directions.

As shown in the figure, the rudder shaft 54 of the auxiliary rudder 52 is located at a position in the ship forward direction from the screw 20a of the propeller unit 20 and the propeller unit 2
0 on the propeller axis 100, and the rudder shaft 22 of the idler 14 is within the projection plane S in the retreating direction of the ship, which is contoured by the rotation locus of the screw 20a of the propeller unit 20,
Further, the propeller unit 20 is disposed at a position displaced laterally from the propeller axis 100.

That is, the rudder shaft 22 of the idler 14 is set to θ ≒ 45 ° with respect to a right angle line 200 on the screw 20a with respect to the propeller axis 100, and on the right angle line 200 on the screw 20a.
It is provided at a position such that L ₁ : L ₂ has a ratio of 6: 4.
In the case where the screw advances rightward when viewed from the ship retreat direction, the thrust due to the water flow from the upper right to the lower left in the plane is large at the stern, so it is particularly effective to attach the idler rudder shaft 22 as described above. It has been confirmed that the steering characteristics at the time of forward and backward travel are obtained.

In FIG. 14, a link mechanism 58 is connected to a hydraulic pump (not shown) and a steering handle, and
Rotary type passive cylinder 60 interposed between
And an arm 62 connected to the rod of the cylinder 60, an arm 64 connected to the rudder shaft 22 of the idler 14, and both arms 62 and 64.
And a link rod 64a for connecting the cylinder 6
An arm 66 connected to the rod No. 0, an arm 68 connected to the rudder shaft 54 of the auxiliary rudder 52, and a link rod 64b connecting the arms 66, 68 are provided.

Thus, for example, a hydraulic pump connected to a pulley with an outboard motor engine, a passive cylinder 60
Is rotated in one direction, the link shafts 64a and 64b cause the idle shaft 14 and the rudder shafts 22 and 54 of the auxiliary rudder 52 to rotate synchronously in the same direction. Accordingly, the idle rotation and the rudder shaft rotation of the auxiliary rudder can be performed by one drive system, and the setting operation of the rudder angle becomes extremely simple. At this time, the hull form of the ship,
The mounting position of each link rod or arm may be set to any mounting angle in accordance with the standards, etc.
A mechanism may be used in which the 60 is a direct-acting passive cylinder, and a rotating portion for connecting the two link rods 64a and 64b is separately provided to perform synchronous rotation.

As shown in FIG. 16, the link mechanism can drive the idler 14 and the auxiliary rudder 52 by one drive system even when the auxiliary rudder 52 is provided outside the projection plane S formed by the rotation locus of the screw 20a. Things.

As shown in FIG. 17, an arm 70 is attached to the idler 14 in addition to the arm 64 connected to the cylinder 60 side, and this arm 70 is connected to the link rod 64b and the arm 68 to connect the rudder shaft 2
2 and 54 may be rotated synchronously.

In the present embodiment, in particular, as shown in FIG.
Opposite direction, i.e. Kajitsubasa 56 of the auxiliary rudder 52 and the rudder blade idler rudder when Kajitsubasa 26 idler rudder 14 which is provided parallel to the hull longitudinal direction of the ship in the ship backward direction (X ₁ direction) , it is provided in the ship traveling direction (X ₂ direction). With this, the two rudder wings 2
6 and 56 are the same as being mounted in opposite directions about the passive cylinder 60, and the passive cylinder is rotated with a smaller rotating torque, so that power,
The fuel efficiency can be reduced.

In particular, in the embodiment shown in FIGS. 14 and 15, the auxiliary rudder 52 is located on the propeller axis 100 in the ship forward direction from the screw 20a of the propeller unit 20, so that the water flow due to the rotation of the screw 20a is reliably captured. The steering is improved. Therefore, in this case, it is particularly effective when the idle turning is attached to a large vessel or the like.

The rudder shaft 22 of the idler 14 is connected to the screw 20 of the propeller 20.
The propeller axis of the propeller unit 20 is within the projection plane S in the ship retreating direction formed by the contour of the rotation locus of a.
By disposing it at a position displaced to the right from 100, in the case of a ship traveling by rotating the screw to the right, it is possible to effectively steer the water flow from the oblique right direction.
Therefore, in the case of a ship traveling by left rotation, the rudder shaft is provided at a position displaced to the left from the propeller axis, contrary to the embodiment.

Next, in connection with the second embodiment described above, FIGS.
Fourth Embodiment A rudder mechanism according to a fourth embodiment of the present invention will be described with reference to the drawings. The same members as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, the auxiliary rudder 52 is provided immediately before the screw 20a of the propeller unit 20. The auxiliary rudder 52 may be attached not only to the position immediately in front of the screw 20a as shown in the figure, but also to a position close to the screw 20a.For example, the auxiliary rudder 52 may be provided at a position displaced in a direction substantially orthogonal to the longitudinal direction of the boat from the position immediately before. Is also good.

According to the second embodiment, it is also possible to set the optimal left and right anti-sweep angles in order to prevent the entire ship from being swept by wind or tidal current in accordance with the hull form, the standard, etc. of each ship. A similar effect is obtained.

III. Effects of the Invention As described above, according to the rudder mechanism for a ship according to the present invention, a ship provided with idler steering is provided with a screw of a propeller section substantially at the side of the ship and downward from the bottom of the ship. Attaching a flat plate for stabilizing the course allows the rudder wings to escape from the projection plane in the retreating direction of the ship, which is contoured by the rotation trajectory of the screw while the ship is being propelled by idle rotation, greatly improving ship propulsion efficiency and fuel efficiency. At the same time, it is possible to prevent the entire ship from being swept away by the tidal current and the wind by the flat plate which is out of the projection plane and immersed in the water, thereby improving steering.

In addition, an auxiliary rudder consisting of a normal rotary rudder is attached in parallel with the idler to the side of the screw of the propeller near the ship, so that the entire ship can be adjusted by wind and tidal current in accordance with the ship type and standard of each ship. In order to prevent the ship from being swept away, the optimum left and right swirl prevention angles can be set even while the ship is running.

Further, by arranging the auxiliary rudder immediately before or in the vicinity of the screw of the propeller section, the optimum shed angle can be set even while the ship is running.

In addition, by providing a link mechanism for synchronously rotating the rudder shaft of the idle rudder and the rudder shaft of the auxiliary rudder around the axis,
The rudder shaft rotation of the idle steering and the auxiliary rudder can be performed by one drive system, and the setting operation of the rudder angle becomes extremely simple.

Further, by providing the rudder for idle rotation and the rudder for auxiliary rudder in directions opposite to each other, the passive cylinder is rotated with a smaller rotational torque, and power and fuel efficiency can be reduced.

The rudder axis of the auxiliary rudder is located on the propeller axis of the propeller section in the ship forward direction position with respect to the screw of the propeller section, and the rudder axis of the idler forms an outline by the rotation locus of the screw of the propeller section. In the projection plane in the retreating direction of the ship, and at a position displaced laterally from the propeller axis of the propeller section, the water flow due to the rotation of the screw is reliably captured, and good steering is achieved. In addition, it is possible to effectively steer the water flow obliquely with respect to the rotation direction of the screw.

[Brief description of the drawings]

1 is an enlarged side view of a main part of a first embodiment of a rudder mechanism of a ship according to the present invention, FIG. 2 is a perspective explanatory view of a main part showing an embodiment of a free shaft part of the first embodiment, FIG. 3 is a view of the idler shaft viewed from the ship forward direction, FIG. 4 (a) is a perspective explanatory view showing a projecting piece of the idler shaft, and FIG. FIG. 5 is a perspective view showing a protruding piece receiving portion of the turning shaft portion, FIG. 5 is a view taken along line VV of FIG. 4 (a), and FIG. 6 is a view of the free turning shaft portion viewed from another angle. 7 is a schematic side view showing an operation state of the main part, FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 7, and FIG. 9 is a main part viewed from the stern direction of the ship. Enlarged front view, FIG. 10 is a schematic plan explanatory view for explaining an attachment position of a free-wheel rudder, a flat plate, etc., FIG. 11 is an enlarged side view of a main part of a second embodiment of a rudder mechanism of a ship according to the present invention, Fig. 12 shows the main part of the ship as viewed from the stern direction. FIG. 13, FIG. 13 is a schematic plan view for explaining the mounting position of the idler steering, auxiliary rudder, etc., FIG. 14 is a schematic plan view for explaining the link mechanism, and FIG. 15 is a schematic enlarged side view thereof. 16 and 17 are schematic plan explanatory views showing another embodiment of the phosphorus mechanism, and FIG. 18 is an operational explanatory view of the link mechanism. FIG. 19 is an enlarged side view of a main part of a fourth embodiment of the rudder mechanism of a ship according to the present invention, FIG. 20 is an enlarged front view of the main part of the ship viewed from the stern direction, and FIG. It is a schematic plan explanatory view explaining the attachment position of a rudder, an auxiliary rudder, etc. 10 …………………………………………………………………………………………… ………………………………………………………………………………….
... flat plate, 20 ... propeller part, 22 ... rudder shaft, 24 ... idler shaft part, 26 ... rudder wing, 28 ... idler wing part, 34 ... idler shaft, 52 ...
... Auxiliary rudder, 54 ... Ruddle shaft, 56 ... Rudder wing, 58 ... Link mechanism, 60 ... Passive cylinder, 62, 64 ... Arm, 64a, b
…… Link rod, 66, 68, 70 …… Arm

Claims (6)

(57) [Claims] 1. A rudder shaft, a free-rotating shaft portion connected to the other end of the rudder shaft, the rudder shaft being provided at a position closer to a retreating direction of a ship with respect to a propeller portion provided at a lower center portion of a stern of the ship. And a rudder blade fixed to the idler shaft portion, which is disposed behind the propeller portion, and the idler blade portion is rotatable in the retreating direction of the ship. A rudder mechanism for a ship provided with a free-wheeling rudder, wherein a flat plate for stabilizing the course is erected substantially at the side end of the screw of the propeller part and below the bottom of the ship. Rudder mechanism. 2. A rudder shaft, a free shaft portion connected to the other end of the rudder shaft, the rudder shaft being provided at a position closer to the retreating direction of the ship with respect to a propeller portion provided at a lower center portion of the stern of the ship. And a rudder blade fixed to the idler shaft portion, which is disposed behind the propeller portion, and the idler blade portion is rotatable in the retreating direction of the ship. A rudder mechanism for a ship provided with an idle rudder, wherein an auxiliary rudder comprising a normal rotary rudder is attached in parallel with the idler rudder at substantially the side end of the screw of the propeller section. . 3. The auxiliary rudder is disposed immediately before or adjacent to a screw of a propeller section.
The rudder mechanism of the ship as described. 4. The boat rudder mechanism according to claim 2, further comprising a link mechanism for synchronously rotating the rudder shaft of the idler rudder and the rudder shaft of the auxiliary rudder around the axis. 5. The rudder mechanism for a boat according to claim 2, wherein the rudder for the idler rudder and the rudder for the auxiliary rudder are provided in directions opposite to each other. 6. The rudder shaft of the auxiliary rudder is located on the propeller axis of the propeller unit at a position in the ship forward direction with respect to the screw of the propeller unit, and the rudder shaft of the idler is the rotation of the screw of the propeller unit. The ship according to any one of claims 2 to 5, wherein the ship is arranged in a projection plane in the retreating direction of the ship, the contour being formed by the trajectory, and at a position displaced laterally from the propeller axis of the propeller unit. Rudder mechanism.