JPH0419296A - Side thruster - Google Patents

Abstract

PURPOSE:To generate a lateral propulsive force by operating an elevating means in a recessed part opened to the lower part of a ship bottom, and driving a propulsion means in a state that the propulsion means and a cover plate are protruded from the recessed part. CONSTITUTION:A recessed part 2 opened downward from a recessed part wall 19 being the extension part of a ship bottom plate 12 is formed below a cabin 16, and a cover plate 20 to cover the recessed part 2 therewith is mounted. The cover plate 20 and a propulsion means 6 are rotatably intercoupled through a support shaft 7. During ordinary running, the propulsion means 6 is contained in the recessed part 2. When a lateral motive force is exerted on a bow part during sailing alongside a pier, an elevating means 5 is actuated to rotate the propulsion means 6 around a support shaft 7, and a propeller 4 is protruded downward from a ship bottom. When a body 60 is rotated, the cover body 20 is also rotated integrally. Through drive of a drive motor 61, the propeller 4 is rotated to generate a lateral propulsive force on the bow part of a ship hull 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a side thruster that applies a horizontal propulsive force to the bow and bottom of a ship.

[Conventional technology]

Recently, a bow thruster has been installed at the bottom of the bow of a pleasure boat in order to improve its operating performance when docking. For example, as shown in FIG.
0a, and a propeller 40 is disposed inside it, and the propeller 40 is rotated (normally or reversely) when docking, etc., to generate a lateral propulsive force in the bow section.

Further, as shown in FIG. 5, a downwardly opening recess 10b is formed in the bottom of the bow of the hull 10, and a propeller 40 rotating in a nozzle 41 and a block 10c below the propeller 40 are disposed within this recess 10b. A hydraulic cylinder 50 installed in the hull 10 drives the propeller 40 via a piston rod 51.
And the block 10c is made to protrude below the hull as shown. In this state, the propeller 40 is rotated to generate a horizontal propulsive force, and the propeller 40 is rotated to generate a horizontal propulsive force.
0 and the block 10C are raised and housed in the recess 10b, and the surface of the recess 10b is made into a smooth hull outer plate by the block 10c.

[Problem to be solved by the invention]

In the configuration shown in Fig. 4 above, when the hull is running normally, the recess 1
There is a drawback that the propulsion resistance increases because turbulence occurs in the 0H portion. In addition, in the configuration shown in Figure 5, the propeller 4
Since the hydraulic cylinder 50 for vertically moving the boat extends upwardly within the hull and occupies an internal space such as the bow, there is a problem in that it becomes a hindrance when a cabin is formed in this area.

This invention was made to solve these conventional problems, and makes it possible to effectively utilize the internal space of the hull, without increasing propulsion resistance, and improving driving performance when docking. It is an object of the present invention to provide a side thruster that can be improved.

[Means to solve the problem]

In this invention, a downwardly opening recess is formed in the bottom of the ship, and a cover plate is attached that closes this recess to form a smooth outer surface of the ship's bottom. A shaft, a lifting means, and a propulsion means are provided, the cover plate and the propulsion means are attached around the support shaft, and the propulsion means includes a propeller facing in the width direction of the ship and a drive means for driving the propeller, The elevating means is configured to rotate the cover plate and the propulsion means about an axis to cause the propeller to protrude outward from the hull outer plate.

[Effect]

In the above configuration, when docking, etc., the elevating means in the recess is operated to rotate the propulsion means and the cover plate about the horizontal axis in a horizontal direction, thereby driving the propulsion means in a state where they protrude outside the recess. By doing so, it is possible to generate a lateral propulsive force, and by storing the propulsion means in the recess by the elevating means during normal running, it is possible to close the recess with the lid plate and prevent an increase in propulsion resistance.

〔Example〕

In FIG. 1, in the bow part of a hull 1 made of FRP, a space surrounded by a deck 11, a bottom plate 12, and a bow plate 13 is partitioned by bulkheads 14 and 15, and there is a cabin 16; An anchor chain store 17 is formed in the cabin 16, and a bed 18 is formed in the cabin 16. Further, on the lower side of the cabin 16, a downwardly opening recess 2 is formed by a recess wall 19 as an extension of the bottom plate 12, and the recess 2 is closed to form a bottom surface with a smooth outer surface. A cover plate 20 is attached.

As shown in FIGS. 2 and 3, a support bracket 3 having a triangular side surface and a U-shaped cross section is provided in the recess 2.
The support bracket 3 is attached to the recess wall 19 with bolts 30, and a horizontal support shaft 7 is attached to the lower end of the support bracket 3.

The support shaft 7 rotatably connects the cover plate 20 and the propulsion means 6 via a bracket 8.

The recess wall 19 may be integrally molded when the hull 1 is molded using FRP. That is, when molding the bottom plate 12 in a mold, a mold for the recess wall 19 is placed at a predetermined position, the recess wall 19 is also molded to be integrated with the ship bottom plate 12, and then the recess wall 19 is molded. The enclosed portion of the bottom plate 12 may be cut out to form the recess 2, and the cut piece may be used as the cover plate 20.

The propulsion means 6 includes a propeller 4 provided at the tip of the main body 60 and facing in the width direction of the ship, and a drive motor 61 arranged in the main body 60 to rotate the propeller 4. This drive motor 61 may be a hydraulic motor or an electric motor. When using a hydraulic motor,
The hydraulic pump may be placed inside the recess wall 19 (on the inside of the ship).

Further, a variable pitch propeller may be employed as the propeller 4. A lifting means 5 such as a hydraulic cylinder is provided between the support bracket 3 and the tip of the main body 60, and the main body 60 and the cover plate 20 are connected by a connecting member 63.

In the above configuration, during normal running, the propulsion means 6 and the like are housed in the recess 2 as shown by solid lines in FIGS.
2 to form a smooth bottom surface. In addition, when it is desired to generate a lateral propulsive force in the bow section, such as when berthing, the elevating means 5 is operated to move the propulsion means 6 to the support shaft 7.
The propeller 4 is rotated clockwise in FIGS. 1 and 2 to project the propeller 4 below the bottom of the ship as shown by the imaginary line. When the main body 60 is rotated, the cover plate 20 connected to the main body 60 by the connecting member 63 also rotates together. Then, the drive motor 61 is driven to rotate the propeller 4, and the hull 1 is rotated.
generates a sideways thrust at the bow of the ship.

By having the structure in which the propulsion means 6 and the cover plate 20 are rotatably held by the horizontally oriented support shaft 7, the propulsion means can be installed without having to extend greatly upwards inside the hull. The upper part can be effectively used as a cabin, and it is also possible to generate large lateral propulsive force using a large-diameter propeller.It is also equipped with a lid plate that forms part of the hull outer plate. Because of this, large propulsion resistance does not occur during normal driving.

In the above embodiment, only the case where the thruster is provided in the bow part and used as a bow thruster has been described, but the thruster may be arranged in the stern part and used as a stance thruster. Furthermore, this device is not limited to use when docking, but can also be used in combination with a direction sensor to create a system that allows the boat to stand up against the wind to facilitate fishing activities.

Further, as described above, when forming the bottom plate 12, the recess wall 19
If they are integrally molded, it has the advantage that it is easy to manufacture, has excellent strength, and there is no risk of leakage at the connection between the two. Furthermore, in the above embodiment, all parts such as the propeller 4 are attached to the support bracket 3, but in this way, this part can be assembled outside the ship and then attached to the recess wall 19, making the attachment work easier. There is an advantage in that.

Further, when a variable pitch propeller is adopted as the propeller 4, it has the characteristic that the bow and stern of the boat can be slightly swung from side to side.

Further, as in the above embodiment, when the support shaft 7 is provided on the front side of the recess 2, there is an advantage that if the cover plate 20 collides with the seabed during forward movement, it can escape backward.

〔Effect of the invention〕

As explained above, the present invention forms a downwardly opening recess in the bottom of the ship, arranges therein a propulsion means that generates a propulsive force laterally, and rotates the propulsion means about a horizontal horizontal axis. Make it protrude outside the recess,
Furthermore, this recess is provided with a cover plate that protrudes together with the propulsion means, and by rotating and protruding the propulsion means and the cover plate using the lifting means, it is possible to generate sideways propulsive force when docking, etc. During travel, the concave portion can be closed with a cover plate to prevent propulsion resistance from increasing.

In this configuration, since there is no need to dispose the elevating means in an upwardly protruding manner, the interior space above the recess can be effectively used as a cabin or the like.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of the front part of the hull showing an embodiment of the present invention;
FIG. 2 is an enlarged view of the recessed portion, FIG. 3 is a sectional view taken along the line ■--■ in FIG. 2, and FIGS. 4 and 5 are perspective views of the conventional structure. DESCRIPTION OF SYMBOLS 1... Hull, 2... Recessed part, 3... Support bracket, 4... Propeller, 5... Lifting means such as a hydraulic cylinder, 6... Propulsion means, 7... Support shaft, 20...
lid plate. Patent Applicant Yamaha Motor Co., Ltd. Agent Patent Attorney Etsushi Kotani Patent Attorney Chief 1) Masashi Patent Attorney Takao Ito Figure Figure Figure Figure Figure

Claims (1)

[Claims] 1. A downwardly opening recess is formed in the bottom of the ship, and a cover plate is installed to close this recess to form a smooth outer surface of the ship's bottom. Inside this recess, a horizontal support shaft, A lifting means and a propulsion means are provided, and the cover plate and the propulsion means are attached around the support shaft,
The propulsion means includes a propeller facing in the width direction of the ship and a drive means for driving the propeller, and the elevating means rotates the cover plate and the propulsion means about an axis to move the propeller to the outside of the hull. A side thruster characterized by being configured to protrude.