JPH0550989A - Ship bow thruster gate apparatus - Google Patents

Abstract

PURPOSE:To prevent a thruster gate from interfering with a hull by stabilizing the rising and lowering operations of the thruster gate. CONSTITUTION:A guide pin 4 guided through a guide rail 5 fixed to a hull is provided for a thruster gate and below the guide pin 4, a guide stopper 16 which prevents the top of the thruster gate 1 from rotatively moving toward the external direction of the hull and is guided through the guide rail 5 is provided at the bottom of the thruster gate. A back stopper 13 which prevents the thruster gate 1 from rotatively moving toward the internal direction of the hull is provided on the back frame positioned at the back of the thruster gate 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a gate device which is installed at an opening of a thruster tunnel which penetrates the bow or stern of a ship in a transverse direction.

[0002]

2. Description of the Related Art Some ships are provided with bow thrusters below the water surface of the bow in order to change the direction of the bow or stern in a port or the like. This is equipped with propelling means such as a propeller in a thruster tunnel that penetrates the vessel in the transverse direction.

By the way, if the opening of such a thruster tunnel remains open during navigation, the wave-making resistance increases due to the vortex flow generated around the opening, and the fuel efficiency of the ship is likely to deteriorate. Also, when the opening exposed on the water surface is submerged again due to pitching during navigation, the residual air in the thruster tunnel becomes bubbles and flows into the water. Will interfere with the reception of. Therefore, it is desirable to close the opening of the thruster tunnel during navigation, and for this reason, for example, JP-A-2-22739 proposed by the present applicant.
As in 7, a bow thruster gate device is known in which a gate is slid up and down via a driving means such as a hydraulic cylinder.

As shown in FIG. 9, the thruster gate 1 is slid up and down along a guide rail 5, but the thruster gate 1 which is in close contact with the outer plate 3 of the hull is closed by a hydraulic cylinder 12. After being pulled inside the hull via the guide pin 9 and the link 8, it is lifted upward.

[0005]

However, according to the above-mentioned device, the back stopper 13 restricts the swinging of the upper portion of the thruster gate 1 toward the inner side of the hull. There is no regulation for swinging to
Furthermore, since the thruster gate 1 rises and falls in a narrow storage space while standing almost vertically, the center of gravity position 20 of the thruster gate 1 may be near the line of force of the link 8 and may not be stable. There was a risk that the thruster gate 1 would fluctuate, causing sticking due to collision with the hull.

An object of the present invention is to stably raise and lower the thruster gate without interfering with the hull.

[0007]

SUMMARY OF THE INVENTION The present invention provides a thruster gate for closing an opening of a thruster tunnel penetrating the vessel in the transverse direction, and a guide pin protruding laterally from both sides of the central portion of the thruster gate. A guide rail that guides the guide pin in a substantially vertical direction is fixed to the hull, and a cradle that receives the guide pin at the closed position of the thruster gate is fixed to the guide rail, while a back frame guided by the guide rail is linked. In a bow thruster gate device for a ship, which is connected to the upper part of the thruster gate via the above, and which has an actuator for driving the back frame along a guide rail, in the inward hull direction of the upper part of the thruster gate centered on the guide pin. A back stopper that restricts the rotation of the back flap is located at the back of the thruster gate. The thrust gate, which is provided under the guide pin and which is located below the guide pin and which slidably contacts the side surface of the guide rail when the thruster gate is opened and restricts rotation of the upper portion of the thruster gate toward the outer side of the hull. Set up in.

[0008]

[Operation] When the actuator is operated from the closed position and the upper back frame is pulled up, the thruster gate rotates the upper part inside the hull with the guide pin in the center as a fulcrum via the link, and then the thruster gate moves back. While the left and right swings are regulated by the stopper and the guide stopper, the guide rail moves up to open the thruster tunnel.

Further, when the actuator is operated in the reverse direction, the thruster gate descends, and the guide stopper separates from the guide rail in the vicinity of the lowest position to allow the thruster gate to rotate in the outer direction of the hull, and After the guide pin is received by the pedestal, the guide pin on the upper side, which further descends, rotates the upper portion of the thruster gate to the outside of the hull via the link and holds it in the closed position.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a thruster gate, 2 is a thruster tunnel, and 3 is a hull skin. As shown in FIG. 2, the thruster tunnel 2 penetrates the hull near the bow in the transverse direction and opens to the hull, and the thruster gate 1 closes this opening from the inside of the hull on the same plane as the hull skin 3. It forms part of the ship's belly.

The thruster gate 1 is formed in a rectangular shape as shown in FIG. 3, and guide pins 4 are provided on both sides of the central portion so as to project laterally. Guide rails 5 that guide the guide pins 4 diagonally upward are fixed to the hull on both sides of the thruster gate 1. A pedestal 6 shown in FIG. 4 for receiving the guide pin 4 is provided at the lower end of the guide rail 5.

A pin 7 is provided on the upper portion of the thruster gate 1 so as to project toward both sides, and the pin 7 and a guide pin 9 which is guided by the guide rail 5 and slides are connected via a link 8. Further, a back frame 11 that moves the pins 10 at both ends along the guide rails 5 is provided on the back surface of the upper portion of the thruster gate 1. The guide pins 9 are fixed to the back frame 11 and integrated with the back frame 11. And goes up and down along the guide rails 5.

The central portion of the back frame 11 is shown in FIG.
As shown in, a piston rod 12B of a hydraulic cylinder 12 as an actuator, in which a cylinder tube 12A is supported by a hull, is connected by a hinge 17.

A back stopper 13 is fixed to the back frame 11 so as to come into contact with the upper rear surface of the thruster gate 1 and prevent the upper portion of the thruster gate 1 from rotating more than a predetermined amount toward the inside of the hull. In the present invention, the guide stoppers 16 are provided below the guide pins 4 on both sides of the lower portion of the thruster gate 1, and contact the outside of the guide rails 5 when the thruster gate 1 rises, so The upper part of the gate 1 is configured so as to restrict rotation of the upper part of the gate 1 toward the outside of the hull. The guide stopper 16 is configured as a guide roller that rotates along the guide rail 5.

At the outer edge of the upper portion of the thruster gate 1, a support 1 that contacts the hull skin 3 from the inside in the closed position.
4 is attached. On the other hand, the hull outer plate 3 is provided with a support 15 for supporting the lower portion of the thruster gate 1 in the closed position from the inside of the hull.

Next, the operation will be described.

In the solid line of FIG. 1 and in the closed position shown in FIG. 5, the upper part of the thruster gate 1 contacts the hull skin 3 via the support 14, and the lower part contacts the hull side support 15. The guide pin 4 is supported by a pedestal 6 at the bottom of the guide rail 5.

When the hydraulic cylinder 12 is contracted from this position, the upper portion of the thruster gate 1 comes into contact with the back stopper 13 via the link 8 as the guide pin 9 is pulled up along with the back rail 11 along the guide rail 5. The thruster gate 1 is pulled toward the inside of the hull until the guide pin 4 on the pedestal 6 is used as a fulcrum to rotate the upper part inward of the hull and separate the lower part from the support 15 as shown in FIG.

When the hydraulic cylinder 12 is further contracted,
As shown in FIG. 7, the thruster gate 1 starts to move along a guide rail 5 that guides the guide pins 4 and 9 toward a storage position diagonally above. Immediately after the start of this movement, the guide stopper 16 slides on the outside of the guide rail 5 and is guided. The thruster gate 1 is restricted from swinging in the inner direction of the hull by the back stopper 13 and in the outer direction of the hull by the guide stopper 16, and can be stably pulled up to the storage position without swaying left and right around the guide pin 4. When the direction of the bow is changed in a harbor or the like, the thruster tunnel 2 is opened in this way, and a propulsion device (not shown) mounted in the thruster tunnel 2 is driven.

On the other hand, when the thruster gate 1 is moved from the retracted position to the closed position in order to close the opening of the thruster tunnel 2, the contracted hydraulic cylinder 12 is extended. As a result, the thruster gate 1 becomes the back stopper 1
While being prevented from swinging by 3 and the guide stopper 16, the guide stopper 16 is separated from the guide rail 5 as shown in FIG. 6, and the guide pin 4 contacts the pedestal 6 as shown in FIG. When reaching the opening position, the upper part of the thruster gate 1 is allowed to rotate in the outer direction of the hull.

When the hydraulic cylinder 12 is further extended from this state, the guide pin 9 which continues to descend is linked by the link 8
The upper portion of the thruster gate 1 is pushed out to the outside of the hull through the guide, and the upper portion of the thruster gate 1 rotates in the outer direction of the hull with the guide pin 4 as a fulcrum to reach the closed position shown in FIG.

In the closed position, the thruster gate 1 presses the upper support 14 from the inside to the hull skin 3 by the rotational force exerted on the thruster gate 1 by the hydraulic cylinder 12 via the guide pin 9 and the link 8. In addition, since the lower part is crimped from the outside to the support 15 formed on the hull outer plate 3, sufficient supporting force can be obtained against external pressure such as waves.
Furthermore, there is no step between the thruster gate 1 and the hull skin 3, and the wave-making resistance during navigation is extremely small.

By the way, the dimensions of the hull and the thruster gate 1
Depending on the position, it may be difficult to mount the hydraulic cylinder 12 inside the hull. In such a case, as shown in FIG. 8, the piston rod 1 of the hydraulic cylinder 12 is
By disposing 2B on the hull side and the cylinder 12A on the thruster gate 1 side and connecting the guide pin 9 in the middle of the cylinder 12A, while ensuring the stroke of the hydraulic cylinder 12 required for lifting the thruster gate 1, The overall height of the device can be suppressed.

[0025]

As described above, according to the present invention, since the swinging of the thruster gate is regulated by the back stopper and the guide stopper in any direction around the guide pin while the thruster gate is moving up and down, the wave or the tidal current There is an effect that it can be smoothly slid up and down with almost no influence of, and interference with the hull can be surely avoided.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a side view of the ship showing the position of the bow thruster.

FIG. 3 is a front view of a thruster gate.

FIG. 4 is a detailed view of a lower end portion of the guide rail 5.

FIG. 5 is a state diagram of each operating portion of the thruster gate in the closed position.

FIG. 6 is a state diagram of each operating portion of the thruster gate at the start or end of opening / closing.

FIG. 7 is a state diagram of each operation unit of the thruster gate during the ascending / descending operation.

FIG. 8 is a schematic view of a bow raster gate device according to another embodiment.

FIG. 9 is a schematic view showing a conventional technique.

[Explanation of symbols]

 1 Thruster Gate 2 Thruster Tunnel 3 Hull Outer Plate 4 Guide Pin 5 Guide Rail 6 Cradle 8 Link 9 Guide Pin 11 Back Frame 12 Hydraulic Cylinder 13 Back Stopper 16 Guide Stopper

Claims (1)

[Claims] 1. A thruster gate for closing an opening of a thruster tunnel penetrating in a transverse direction of a ship's side is provided, and guide pins are provided to project laterally from both sides of a central portion of the thruster gate.
A guide rail that guides the guide pin in a substantially vertical direction is fixed to the hull, and a cradle that receives the guide pin at the closed position of the thruster gate is fixed to the guide rail, while a back frame guided by the guide rail is linked. In a bow thruster gate device for a ship, which is connected to the upper part of the thruster gate via the above, and which has an actuator for driving the back frame along a guide rail, in the inward hull direction of the upper part of the thruster gate centered on the guide pin. A back stopper for restricting the rotation of the thruster gate is provided on the back frame at the back side of the thruster gate, is positioned below the guide pin, and is in sliding contact with the side surface of the guide rail when the thruster gate is opened. Install a guide stopper that regulates the rotation of the upper part of the thruster gate toward the outside of the hull. Serial bow thruster gate device of the ship, characterized in that provided on the thrust gate.