JP2012162110A - Rudder with rudder valve, ship, and rudder valve, and method for manufacturing rudder with rudder valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rudder with a rudder valve which can be easily manufactured, a ship, the rudder valve, and a method for manufacturing the rudder with the rudder valve.SOLUTION: The rudder 3 with the rudder valve includes: a cylindrical rudder valve 5 with at least axial one end closed; and a rudder 4 for controlling a propulsion direction. An opening part 41 having a shape corresponding to the outer shape of the rudder valve 5 is formed at the position opposite a propulsion propeller 2 in the rudder 4, and the rudder valve 5 is joined to the opening part 41 with one end facing the propulsion propeller 2. Thus, the rudder valve 5 does not need to be molded according to the rudder 4, and the shape of the rudder valve 5 can be simplified.

Description

  The present invention relates to a rudder with a rudder valve, a ship, a rudder valve, and a method for manufacturing a rudder with a rudder valve.

  Conventionally, there is known a rudder with a rudder valve in which a rudder valve is provided behind a propeller in order to improve propulsion efficiency. For example, Patent Documents 1 and 2 below describe a rudder with a rudder valve in which a rudder valve is mounted on a propeller rotation axis at the front end of the rudder so as to face the propeller.

  For example, as shown in FIG. 8, when manufacturing such a conventional rudder valve-equipped rudder 30, first, a plurality of vertical ribs 101 arranged in parallel in the front-rear direction at a predetermined interval and parallel in the vertical direction at a predetermined interval. The plurality of arranged horizontal ribs 102 are combined so as to intersect with each other to form an assembly 103 as a skeleton of the rudder 40. At this time, a plurality of reinforcing plates 104 are disposed at positions corresponding to the propeller at the front end (see FIG. 8A).

  Subsequently, an outer plate is attached to the assembly 103 so as to cover the side surface of the assembly 103 to form the rudder 40 (see FIG. 8B). Then, the rudder valve 50 is formed in the rudder 40 by joining a plurality of members 105 to the position corresponding to the propeller at the front end portion of the rudder 40 in combination with the outer shape of the rudder 40 (FIGS. 8C and 8D). reference).

JP 2004-299423 A JP 11-139395 A

  Here, as described above, the rudder with a ladder valve requires a ladder valve having a shape corresponding to the outer shape of the rudder. However, since the ladder valve is generally manufactured by thick plate pressing or the like, a difficult molding operation is required when the ladder valve is shaped according to the outer shape of the rudder. Manufacturing of rudder with rudder valve may be complicated. In particular, in the rudder with a ladder valve, when the rudder is a complicated rudder such as a reaction rudder, the shape of the rudder valve becomes complicated, so that the manufacturing becomes complicated.

  Then, this invention makes it a subject to provide the manufacturing method of the rudder with a ladder valve, a ship, a rudder valve, and the rudder with a rudder valve which can be manufactured easily.

  In order to solve the above-mentioned problems, a rudder with a ladder valve according to the present invention includes a cylindrical ladder valve having at least one axial end closed, and a rudder that controls a propulsion direction, and is opposed to a propeller of the rudder. An opening having a shape corresponding to the outer shape of the ladder valve is formed at the position where the ladder valve is formed, and the ladder valve is joined to the opening so that one end thereof faces the propeller.

  In the rudder with a ladder valve of the present invention, an opening having a shape corresponding to the outer shape of the ladder valve is formed in the rudder, and the ladder valve is joined to the opening. Therefore, it is not necessary to mold the ladder valve according to the rudder, the shape of the ladder valve can be simplified, and the manufacture of the ladder valve can be facilitated. And by making a ladder valve into a simple shape, a ladder valve can be easily joined to a rudder and it becomes possible to improve the workability | operativity of a ladder valve attachment. Therefore, according to this invention, manufacture of the rudder with a ladder valve can be facilitated.

  The rudder is preferably a reaction rudder. In the present invention, as described above, since the ladder valve is joined to the opening of the shape corresponding to the outer shape of the ladder valve, even when the rudder is a reaction rudder having a complicated shape that is asymmetrical in the vertical and horizontal directions, It is possible to simplify the shape and improve the workability of attaching the ladder valve, and the rudder valve-equipped rudder can be easily manufactured.

  Further, it is preferable that a first back reinforcing member extending along the axis is provided on the inner surface of the ladder valve. In this manner, by providing the first back reinforcing member on the inner surface of the ladder valve, it is possible to suppress the ladder valve from being deformed by water pressure.

  Moreover, it is preferable that the 2nd back reinforcement member extended along the junction part with an opening part is provided in the inner surface of the ladder valve. Thus, it becomes possible to reinforce the said junction part by providing a 2nd back reinforcement member in a junction part with the opening part of the inner surface of a ladder valve.

  Further, the ladder valve is preferably joined to the opening so that the other end portion in the axial direction is located between the front end portion of the rudder and the rudder shaft. In this case, the rudder shaft can be configured by one (integral) member extending in the vertical direction, and the rudder valve can be prevented from adversely affecting the steering performance of the rudder.

  Moreover, the ship which concerns on this invention comprised the rudder with the said ladder valve, It was characterized by the above-mentioned. Also in the ship of the present invention, it is not necessary to form a ladder valve according to the rudder, the shape of the ladder valve can be simplified, and the manufacture of the ladder valve can be facilitated. And by making a ladder valve into a simple shape, a ladder valve can be easily joined to a rudder and it becomes possible to improve the workability | operativity of a ladder valve attachment. Therefore, a ship can be manufactured easily.

  A ladder valve according to the present invention is provided in the rudder with a ladder valve. Also in the ladder valve of the present invention, it is not necessary to mold in accordance with the rudder, the shape thereof can be simplified, and the ladder valve can be easily manufactured.

  A rudder valve-equipped rudder manufacturing method according to the present invention is a method for manufacturing a rudder valve-equipped rudder, wherein a plurality of plate members are combined so that a space constituting the opening is provided at the front end. A first step of forming an assembly as a skeleton, a second step of attaching a ladder valve to the assembly so as to be positioned in the space of the assembly after the first step, and a ladder valve after the second step. The outer plate as the side surface of the rudder having a notch constituting the opening at the front end is joined to the side surface of the assembled assembly, and the side surface of the ladder valve is joined to the edge of the notch in the outer plate. And 3 steps.

  Also in this method of manufacturing a rudder with a ladder valve according to the present invention, it is not necessary to form a ladder valve according to the rudder, the shape of the ladder valve can be simplified, and the manufacturing of the ladder valve can be facilitated. And by making a ladder valve into a simple shape, a ladder valve can be easily joined to a rudder and it becomes possible to improve the workability | operativity of a ladder valve attachment. Therefore, a rudder with a ladder valve can be easily manufactured.

  According to the present invention, manufacturing can be easily performed.

It is a schematic side view which shows the ship provided with the rudder with a ladder valve of this embodiment. It is an enlarged side view which shows the stern part of the ship of FIG. (A) is a side view of the ladder valve of this embodiment, (b) is a top view of the ladder valve of this embodiment, and (c) is a front view of the ladder valve of this embodiment. 4A is an end view taken along line IV (a) -IV (a) in FIG. 3, and FIG. 4B is an end view taken along line IV (b) -IV (b) in FIG. It is a figure which shows an example of the manufacture procedure in the rudder with a ladder valve of this embodiment. It is the schematic which shows a reaction rudder. It is a figure which shows another example of the manufacturing procedure in the rudder with a ladder valve of this embodiment. It is a figure which shows the manufacture procedure of the conventional rudder with a rudder valve.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted. Further, the terms “front”, “rear”, “left”, “right”, “upper”, and “lower” correspond to the front-rear direction, the left-right (width) direction, and the vertical direction of the hull.

  1 is a schematic side view showing a ship including a rudder valve-equipped rudder according to the present embodiment, and FIG. 2 is an enlarged side view showing a stern part of the ship shown in FIG. As shown in FIG. 1, the ship 1 of the present embodiment is an enlarged ship such as a tanker, and includes a hull 10, a propeller 2 for propulsion, and a rudder 3 with a ladder valve.

  The propeller 2 for propulsion propels the ship 1 and uses, for example, a propeller shaft. The propeller 2 for propulsion is disposed on the stern portion 11 so that a shaft 2a that is a rotation shaft thereof is along the front-rear direction. The rudder valve-equipped rudder 3 is provided on the stern portion 11 so as to be positioned behind the propeller 2 for propulsion.

  As shown in FIG. 2, the rudder 3 with a ladder valve includes a rudder 4, a ladder valve 5, and a rudder shaft 6. The rudder 4 controls the propulsion direction of the ship 1 and is provided behind the propeller 2 for propulsion. The rudder 4 is attached to the hull 10 by a rudder shaft 6 extending in the up-down direction, and can swing (turnable) around the rudder shaft 6. The rudder 4 includes an opening 41 for attaching the ladder valve 5 at a position facing the propeller 2 on the rotation axis C of the propeller 2.

  The opening 41 has a shape corresponding to the ladder valve 5, and the shape seen from the side surface of the rudder 4 is a V-shape opening forward. The opening 41 is provided at a position in front of the rudder shaft 6 from the front end of the rudder 4 in the front-rear direction. The rudder shaft 6 is connected to the hull 10 so that the rudder 4 can swing about the stern vertical line AP, and is a member extending so as to penetrate the rudder 4 in the vertical direction. The rudder shaft 6 is disposed between a vertical rib 421 and a vertical rib 422 which will be described later.

  The ladder valve 5 suppresses vortices generated on the rear side of the propeller 2 for propulsion, and is provided in the opening 41 of the rudder 4. In other words, the ladder valve 5 weakens the vortex rotation by flowing a backward flow generated by the propeller 2 for propulsion along the surface of the ladder valve 5, thereby reducing the vortex resistance and improving the propulsion efficiency.

  3A is a side view of the ladder valve according to the present embodiment, FIG. 3B is a top view of the ladder valve according to the present embodiment, and FIG. 3C is a front view of the ladder valve according to the present embodiment. It is. 4A is an end view taken along line IV (a) -IV (a) in FIG. 3, and FIG. 4B is an end face taken along line IV (b) -IV (b) in FIG. FIG.

  As shown in FIGS. 3 and 4, the ladder valve 5 has a cylindrical shape in which a front end portion (one end portion) in the axial direction is closed. The ladder valve 5 includes a front part 51, a rear part 52, a first back reinforcing member 53, a second back reinforcing member 54, and a mounting member 55. The front portion 51 is a hook-like member that is located on the front side of the ladder valve 5 and is convex in the front direction. The rear portion 52 is a cylindrical member that is located on the rear side of the ladder valve 5 and extends in the front-rear direction with the axis C as a central axis. The front end portion of the rear portion 52 is joined to the rear end portion of the front portion 51 by welding.

  The first back reinforcing member 53 is an annular plate member provided on the inner surface of the ladder valve 5 along the rotational direction around the axis C, and is attached to the inner surface of the ladder valve 5 at the joint portion between the front portion 51 and the rear portion 52. It is erected vertically. The first back reinforcing member 53 is provided to prevent the shape of the ladder valve 5 from being deformed by water pressure, and has a function as a reinforcing member when the front part 51 and the rear part 52 are joined. is doing.

  The second back reinforcing member 54 is a plate material provided on the inner surface of the contact portion between the ladder valve 5 and the rudder 4 after the ladder valve 5 is attached to the rudder 4. The second back reinforcing member 54 here is joined to only the contact portion of the inner surface of the front portion 51 by welding. The attachment member 55 is a plate material extending substantially horizontally in the front-rear direction along the axis C. The front end portion of the mounting member 55 is joined to the inner surface of the front portion 51 by welding, and the side end portions thereof are joined to the inner surface of the front portion 51 and the inner surface of the rear portion 52 by welding. Further, the mounting member 55 has a rear end portion protruding rearward from a rear end portion of the rear portion 52.

  Returning to FIG. 2, the ladder valve 5 is attached in the opening 41 of the rudder 4 so as to be substantially coaxial with the rotation axis C of the propeller 2 for propulsion. Further, the front end portion of the ladder valve 5 projects forward from the front end portion of the rudder 4, and the side surface of the ladder valve 5 is joined so as to be smoothly connected to the opening edge of the opening portion 41 of the rudder 4.

  Next, a method for manufacturing a rudder valve-equipped rudder will be described. FIG. 5 is a diagram illustrating a manufacturing procedure of the rudder valve-equipped rudder according to the present embodiment. First, as shown in FIG. 5A, a plurality of vertical ribs 42 and a plurality of horizontal ribs 43 are prepared. The vertical rib 42 is a substantially rectangular plate material extending in the vertical direction with the front-rear direction of the rudder 4 being the thickness direction. The vertical rib 42 has a length corresponding to the vertical length of the rudder 4 and a width corresponding to the horizontal width of the rudder 4.

  The horizontal rib 43 is a plate material extending in the front-rear direction with the vertical direction of the rudder 4 being the thickness direction. The horizontal rib 43 has a symmetrical streamline shape when viewed from above. Specifically, the horizontal rib 43 is formed such that the rear end portion is formed at an acute angle when viewed from above, the width in the left-right direction is smoothly expanded toward the front end portion, and then is smoothly narrowed. The plurality of horizontal ribs 43 have substantially the same shape except for the mounting horizontal ribs 433 which are horizontal ribs at positions where the ladder valve 5 is mounted. The mounting horizontal rib 433 has a shape in which the front end portion of the horizontal rib 43 is cut off according to the length of the ladder valve 5 in the front-rear direction. Each horizontal rib 43 is formed with a hole (not shown) for disposing the rudder shaft 6 between positions where the vertical rib 421 and the vertical rib 422 are assembled. The vertical ribs 421 and the vertical ribs 422 are arranged before and after the position where the rudder shaft 6 is provided. In addition, at least one of the vertical ribs 42 and the horizontal ribs 43 is formed with slits (not shown) at predetermined intervals for assembling them.

  Subsequently, the plurality of horizontal ribs 43 are arranged in parallel at predetermined intervals in the vertical direction. At this time, rear end portions of the plurality of horizontal ribs 43 are aligned in the front-rear direction. Further, the mounting horizontal rib 433 is disposed at a position where the ladder valve 5 is mounted. That is, the mounting horizontal rib 433 is disposed at a position corresponding to the rotation axis C of the propeller 2 for propulsion in the vertical direction. Then, the plurality of vertical ribs 42 are combined so as to intersect with the plurality of horizontal ribs 43.

  Specifically, the vertical rib 42 and the horizontal rib 43 are fitted using a slit formed in at least one of the vertical rib 42 and the horizontal rib 43, and the vertical rib 42 and the horizontal rib 43 are joined by welding. To do. Thus, the assembly 45 as a skeleton of the rudder 4 is formed (first step). At this time, the assembly 45 is provided with a space S that forms the opening 41 by the longitudinal ribs 42 arranged on the foremost side and the front ends of the horizontal ribs 43 arranged on both sides of the mounting horizontal ribs 433. It is done. This space S is a space for attaching the ladder valve 5 to the rudder 4.

  Next, as shown in FIG. 5B, the ladder valve 5 is attached to the assembly 45 (second step). Specifically, the rear end portion (the other end portion) of the ladder valve 5 is inserted from the front side of the assembly 45 so that the ladder valve 5 is positioned in the space S formed in the assembly 45. Then, the rear end portion of the attachment member 55 of the ladder valve 5 is joined to the front end portion of the attachment horizontal rib 433 by welding. At this time, the rear end portion of the ladder valve 5 is attached to the assembly 45 so as to be positioned between the front end portion of the rudder 4 and the rudder shaft 6.

  Next, as shown in FIG.5 (c), the outer plate | board 44 which comprises the side surface of the rudder 4 is prepared. The outer plate 44 has a plate shape that is curved in a streamlined manner, and includes a right outer plate that forms the right side surface of the rudder 4 and a left outer plate that forms the left side surface of the rudder 4. Both the right outer plate and the left outer plate have a certain length in the vertical direction. The right outer plate is smoothly curved so as to have a convex shape on the right side as it proceeds from the rear end portion to the front end portion. As the left outer plate proceeds from the rear end portion to the front end portion, the left outer plate is smoothly curved so as to have a convex shape on the left side. In a position corresponding to the rotation axis C of the propeller 2 for propulsion at the front end portion of the outer plate 44, the opening 41 of the rudder 4 is configured together with the space S, and a V-shaped side view according to the outer shape of the ladder valve 5 is formed. A notch 441 is formed in the opening.

  Subsequently, the outer plate 44 is attached to the assembly 45 to which the ladder valve 5 is attached (third process). Specifically, each of the inner surface of the right outer plate and the inner surface of the left outer plate is joined to the end of the vertical rib 42 and the end of the horizontal rib 43 of the assembly 45 by welding. And the edge part 442 of the notch 441 formed in the outer plate 44 is contact | abutted to the side surface of the ladder valve 5, and it joins by welding so that it may connect smoothly. That is, in the ladder valve 5, the rudder 4 is smoothly connected to the left and right side surfaces of the rudder 4 in the opening 41 of the rudder 4 formed by the notch 441 of the outer plate 44 and the space S of the assembly 45. It will be joined. With the above procedure, the rudder valve-equipped rudder 3 is completed as shown in FIG.

  As mentioned above, according to rudder 3 with a ladder valve of this embodiment, it is not necessary to make ladder valve 5 into the shape according to the outline of rudder 4, and simplification of the shape of ladder valve 5 and manufacture become easy. The processing cost of the ladder valve 5 can be reduced. And it becomes possible to join the ladder valve 5 to the rudder 4 easily by making the ladder valve 5 into a simple shape, and the workability | operativity which attaches the ladder valve 5 improves. Accordingly, the rudder valve-equipped rudder 3 can be easily manufactured, and the rudder valve-equipped rudder 3 can be reduced in cost.

  In the present embodiment, as described above, the ladder valve 5 is provided with the first back reinforcing member 53, whereby the ladder valve 5 itself is reinforced and the back reinforcement at the time of joining the front part 51 and the rear part 52 is performed. This can be done with one member. For this reason, the manufacturing cost of the ladder valve 5 can be reduced. Furthermore, since the ladder valve 5 joined to the opening 41 of the rudder 4 is subjected to a relatively large load on the front side, the second back reinforcing member 54 is provided on the front portion 51 of the ladder valve 5 as described above. The joint portion between the rudder valve 5 and the rudder 4 can be suitably reinforced.

  By the way, as a rudder for controlling the propulsion direction of the ship, in addition to the rudder 4, a reaction rudder that efficiently recovers the rotational flow energy of the propeller 2 for propulsion is known. FIG. 6 is a schematic diagram showing a reaction rudder. The rudder 4A is a reaction rudder, and its front end is divided into an upper part and a lower part with a position corresponding to the rotation axis C of the propeller 2 for propulsion as a boundary. Curved away. Specifically, the upper and lower portions of the rudder 4A are curved in the left-right reverse direction as the rudder 4A moves toward the front end in the front-rear direction and toward the height of the rotation axis C in the up-down direction. . When attaching a ladder valve to such a reaction rudder, the manufacture thereof has been particularly complicated.

  In contrast, in the present invention, since the opening 41A corresponding to the outer shape of the ladder valve 5 is formed in the rudder 4A, the shape of the ladder valve 5 can be simplified, and the workability of attaching the ladder valve 5 is improved. It becomes possible to improve. The specific description will be given below.

  FIG. 7 is a diagram illustrating a manufacturing procedure of the rudder with rudder valve according to the present embodiment. First, as shown in FIG. 7A, a plurality of vertical ribs 42A and a plurality of horizontal ribs 43A are prepared. The vertical rib 42A is a substantially rectangular plate material extending in the vertical direction with the front-rear direction of the rudder 4A being the thickness direction. The vertical rib 42A has a length corresponding to the length in the vertical direction of the rudder 4A and a width corresponding to the width in the left-right direction of the rudder 4A.

  The horizontal rib 43A is a plate material that extends in the front-rear direction with the vertical direction of the rudder 4A as the thickness direction. The horizontal rib 43A has a streamline shape as viewed from above, and the shape differs depending on the position where it is disposed. Specifically, the horizontal rib 43A is formed such that the rear end is formed at an acute angle when viewed from above, and the width in the left-right direction is smoothly expanded toward the front end, and then is smoothly narrowed. The horizontal rib 431A located on the upper surface of the rudder 4A and the horizontal rib 435A located on the lower surface have a symmetrical shape. The mounting horizontal rib 433A, which is a horizontal rib at a position where the ladder valve 5 is mounted, has a shape in which the front end portion of the horizontal rib 431A is cut off according to the length of the ladder valve 5 in the front-rear direction.

  The horizontal rib 432A disposed between the upper surface of the rudder 4A and the mounting position of the ladder valve 5 has a shape in which the front end portion of the horizontal rib 431A is inclined to the right as it goes to the mounting position side of the ladder valve 5. Yes. In other words, the top portion P2 of the horizontal rib 432A is shifted to the right side with respect to the top portion P1 of the horizontal rib 431A. The horizontal rib 434A disposed between the lower surface of the rudder 4A and the mounting position of the ladder valve 5 has a shape in which the front end portion of the horizontal rib 435A is inclined to the left side toward the mounting position side of the ladder valve 5. Yes. In other words, the top portion P4 of the horizontal rib 434A is shifted to the left with respect to the top portion P1 of the horizontal rib 431A. Each horizontal rib 43A is formed with a hole (not shown) for disposing the rudder shaft 6 between positions where the vertical rib 421 and the vertical rib 422 are assembled. The vertical ribs 421 and the vertical ribs 422 are arranged before and after the position where the rudder shaft 6 is provided. In addition, slits (not shown) are formed at predetermined intervals in at least one of the vertical ribs 42A and the horizontal ribs 43A to assemble them together.

  Subsequently, the plurality of horizontal ribs 43A are arranged in parallel in the vertical direction at a predetermined interval. At this time, rear end portions of the plurality of horizontal ribs 43A are aligned in the front-rear direction. Further, the mounting horizontal rib 433A is disposed at a position where the ladder valve 5 is mounted. That is, the mounting horizontal rib 433A is disposed at a position corresponding to the rotation axis C of the propeller 2 for propulsion in the vertical direction. Then, the plurality of vertical ribs 42A are combined so as to intersect with the plurality of horizontal ribs 43A.

  Specifically, the vertical rib 42A and the horizontal rib 43A are fitted using a slit formed in at least one of the vertical rib 42A and the horizontal rib 43A, and the vertical rib 42A and the horizontal rib 43A are joined by welding. To do. In this way, an assembly 45A as a skeleton of the rudder 4A is formed (first step). At this time, the assembly 45A is provided with a space SA that constitutes the opening 41A by the longitudinal rib 42A disposed on the foremost side and the front end portions of the horizontal ribs 43A disposed on both sides of the mounting horizontal rib 433A. It is done. This space SA is a space for attaching the ladder valve 5 to the rudder 4A.

  Next, as shown in FIG. 7B, the ladder valve 5 is attached to the assembly 45A (second step). Specifically, the rear end portion of the ladder valve 5 is inserted from the front side of the assembly 45A so that the ladder valve 5 is positioned in the space SA formed in the assembly 45A. Then, the rear end portion of the attachment member 55 of the ladder valve 5 is joined to the front end portion of the attachment horizontal rib 433A by welding. At this time, the rear end portion of the ladder valve 5 is attached to the assembly 45A so as to be positioned between the front end portion of the rudder 4A and the rudder shaft 6.

  Next, as shown in FIG.7 (c), the outer plate | board 44A which comprises the side surface of the rudder 4A is prepared. The outer plate 44A has a plate shape that is curved in a streamlined manner, and includes a right outer plate that forms the right side surface of the rudder 4A and a left outer plate that forms the left side surface of the rudder 4A. In a position corresponding to the rotation axis C of the propeller 2 for propulsion at the front end portion of the outer plate 44A, an opening 41A of the rudder 4A is configured with the space SA, and a V-shape in a side view according to the outer shape of the ladder valve 5 A notch 441A is formed in the opening.

  The right outer plate has a certain width in the vertical direction and is smoothly curved so as to have a convex shape on the right side. The front end portion of the right outer plate is divided into an upper portion and a lower portion with a notch 441A as a boundary, and the upper lower end and the lower upper end are curved so as to be separated in the right direction and the left direction, respectively. The left outer plate has a certain width in the vertical direction and is smoothly curved so as to have a convex shape on the left side. The front end portion of the left outer plate is divided into an upper portion and a lower portion with a notch 441A as a boundary, and the lower end of the upper portion and the upper end of the lower portion are curved so as to be separated in the right direction and the left direction, respectively.

  Subsequently, the outer plate 44A is attached to the assembly 45A to which the ladder valve 5 is attached (third step). Specifically, each of the inner surface of the right outer plate and the inner surface of the left outer plate is joined to the end of the vertical rib 42A and the end of the horizontal rib 43A of the assembly 45A by welding. Then, the edge 442A of the notch 441A formed in the outer plate 44A is brought into contact with the side surface of the ladder valve 5 and joined by welding so as to be smoothly connected. That is, in the ladder valve 5, the opening 41A of the rudder 4A formed by the notch 441A of the outer plate 44A and the space SA of the assembly 45A is joined so as to be smoothly connected to the left and right side surfaces of the rudder 4A. Will be. Through the above procedure, the rudder valve-equipped rudder 3A is completed as shown in FIG.

  In such a rudder valved rudder 3A, the rudder valve 5 does not need to have a complicated shape corresponding to the outer shape of the rudder 4A, and the workability for attaching the rudder valve 5 is improved. Can be easily manufactured.

  Further, since the ladder valve 5 is joined to the opening 41A having a shape corresponding to the outer shape of the ladder valve 5, the shape of the ladder valve 5 is provided even when the rudder 4A is provided as a reaction rudder having a complicated shape. Therefore, it is possible to improve the workability of mounting the ladder valve 5 and to easily manufacture the rudder valve-equipped rudder 3A.

  In addition, it is necessary to have one (integral) member which penetrates a rudder in an up-down direction in the rudder center which is the center position which the rudder 4 rotates on a ship classification rule. In this respect, in the present embodiment, as described above, the rear end portion (the other end portion) of the ladder valve 5 is located at the position from the front end portion of the rudder 4, 4 </ b> A to the rudder shaft 6. The rudder valve-equipped rudder 3, 3A can be obtained in accordance with the classification rules, and the rudder valve 5 can be prevented from adversely affecting the steering performance.

  As described above, the rudder valve-equipped rudder, the ship, the rudder valve, and the rudder valve-equipped rudder manufacturing method according to the present invention do not change the gist described in each claim. And the manufacturing method of a rudder valve and a rudder with a rudder valve may be modified or applied to other ones.

  For example, the second back reinforcing member 54 is provided at the joint portion between the ladder valve 5 and the opening 41 of the rudder 4 on the inner surface of the front portion 51, but may be provided at the joint portion of the inner surface of the rear portion 52. . That is, the second back reinforcing member 54 may be provided in the entire joint portion between the ladder valve 5 and the opening 41 of the rudder 4 or may be provided in a part of the joint portion.

  Further, according to the classification rules, the rudder core needs to have one member that penetrates the rudder in the vertical direction. In the above embodiment, the rudder shaft 6 is provided as one member that penetrates the rudder 4 in the vertical direction. However, instead of this, for example, at least one of the longitudinal ribs 421 and the longitudinal ribs 422 may be arranged at the rudder.

  Moreover, in the said embodiment, although the ladder valve 5 is exhibiting the cylinder shape with which the front-end part was closed, you may exhibit the cylinder shape with which the front-end part and the rear-end part were closed. Moreover, in the said embodiment, although the ladder valve 5 is manufactured by joining the front part 51 and the rear part 52, it may replace with this and the ladder valve 5 may be manufactured integrally by casting, for example. Moreover, in the said embodiment, although each of the front part 51 and the rear part 52 is comprised integrally, you may comprise each of the front part 51 and the rear part 52 by joining a some element member. In addition, the ship 1 of the said embodiment is not limited to an enlargement ship, What kind of other ship may be sufficient.

DESCRIPTION OF SYMBOLS 1 ... Ship, 2 ... Propeller for propulsion, 3, 3A ... Rudder with ladder valve, 4, 4A ... Rudder, 5 ... Ladder valve, 41, 41A ... Opening, 44, 44A ... Outer plate, 45, 45A ... Assembly 53 ... 1st back reinforcing member, 54 ... 2nd back reinforcing member, 441, 441A ... Notch, 442, 442A ... Edge, S, SA ... Space

Claims (8)

A cylindrical ladder valve having at least one axial end closed;
A rudder that controls the propulsion direction,
An opening having a shape corresponding to the outer shape of the ladder valve is formed at a position facing the propeller of the rudder,
A rudder valve-equipped rudder, wherein the ladder valve is joined to the opening so that the one end faces the propeller.   The rudder with a ladder valve according to claim 1, wherein the rudder is a reaction rudder.   The rudder valve-equipped rudder according to claim 1 or 2, wherein a first back reinforcing member that extends along the axis is provided on an inner surface of the ladder valve.   The ladder as described in any one of Claims 1-3 with which the 2nd back reinforcement member extended along the junction part with the said opening part is provided in the inner surface of the said ladder valve | bulb. Rudder with valve.   The said ladder valve is joined to the said opening part so that the other end part of the said axial direction may be located between the front-end part of the said rudder and a rudder axle. A rudder with a ladder valve according to one item.   A ship comprising the rudder with a ladder valve according to any one of claims 1 to 5.   The ladder valve with which the rudder with a ladder valve as described in any one of Claims 1-5 was equipped. A method for manufacturing a rudder valve-equipped rudder according to any one of claims 1 to 5,
A first step of forming an assembly as a skeleton of the rudder so that a space constituting the opening is provided at a front end by combining a plurality of plate members;
After the first step, a second step of attaching the ladder valve to the assembly so as to be located in the space of the assembly;
After the second step, an outer plate as a side surface of the rudder having a notch constituting the opening at a front end portion is joined to a side surface of the assembly to which the ladder valve is attached, and the outer plate A rudder valve-equipped rudder manufacturing method, comprising: a third step of joining a side surface of the ladder valve to an edge of the notch.

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