JPH0532297U - Braking structure for ships - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to enable speedy deceleration when the vessel decelerates and stops, and to stop within a short braking distance. [Structure] The braking member 4 is capable of moving up and down on the stern portion 1c of the hull 1.
Attached, and this braking member 4 in the direction perpendicular to the sea surface,
And I tried to drop it into the sea.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a ship braking structure used when a ship is stopped and decelerated.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, a screw, which is a propulsion device for a ship, provided at the stern portion of a hull rotates to advance a ship. Then, by causing the screw to rotate in the opposite direction to the forward propulsion force, a reverse propulsion force is generated, and this reverse propulsion force is converted into a braking force, so that the ship can be stopped and decelerated.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional ship, when stopping and decelerating the ship, since only the reverse rotation of the screw is used, there is a problem that the braking distance becomes long.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a prompt deceleration and a short braking distance when a ship decelerates and stops. It is to provide a braking structure for a ship that can be.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is characterized in that a braking member capable of moving up and down is attached to the stern part of the hull, and this braking member descends in the direction perpendicular to the sea surface and into the sea. .

[0006]

[Action]

 With this configuration, when the ship is stopped and decelerated, in addition to rotating the screw in the reverse direction, the braking member is lowered into the sea, so that the braking member becomes a resistance against the propulsion direction of the ship and the ship is decelerated promptly. At the same time, the ship can be stopped with a short braking distance.

[0007]

【Example】

 The marine braking structure of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a ship provided with a ship braking structure according to the present invention.

The ship is provided with a hull 1, and the hull 1 is composed of a bow portion 1a, a side surface portion 1b, and a stern portion 1c. Below the stern portion 1c, a screw 2 for generating propulsive force of the ship is provided in conjunction with a power source.

The marine braking structure 3 of the present invention comprises a braking member 4 and an elevating device 5 for elevating the braking member 4.

The braking member 4 is formed of a quadrangular iron plate, and the lower portion of the braking member 4 is formed with an arcuate notch 4a, while the upper and left ends of the braking member 4 extend laterally. The braking support member 6 is fixed. Bolt holes 6a are formed at both ends of the braking support member 6. A large number of vertical grooves 7 are formed on the front and back surfaces of the braking member 4.

Further, a lock receiving portion 8 is provided on an upper portion of the braking support member 6, and a lock portion 9 for locking the lock receiving portion 8 is provided on an upper portion of the stern portion 1c. . Further, this locking portion 9 constitutes an electromagnet switch 10 which is unlocked and locked by an electromagnet as shown in FIG.

Further, two hydraulic cylinders 11 are used in the lifting device 5 for lifting and lowering the braking member 4, and the hydraulic cylinders 11 include a cylinder 12 and a piston rod 13 provided inside the cylinder 12. A piston 14 fixed to the end of the piston rod 13, pumps 15a and 15b for sending and feeding hydraulic pressure into the cylinder 12, pipes 16a and 16b as hydraulic passages, and hydraulic tanks 17a and 17b. It consists of

The inside of the cylinder 12 is divided into an upper chamber 18 and a lower chamber 19 via a piston 14, and oil delivery inlet holes 18 a, 19 a are provided in an upper portion of the upper chamber 18 and a lower portion of the lower chamber 19. Are provided respectively and communicate with the respective hydraulic tanks 17a, 17b from the oil delivery inlet holes 18a, 19a via the respective pipes 16a, 16b. A piston rod 13 having one end fixed to the piston 14 extends from the inside of the cylinder 12 so as to be able to move up and down. A bolt hole 13b is provided in the other end portion 13a of the piston rod 13, and a bolt hole 13b provided in the other end portion 13a of the piston rod 13 and both end portions of the braking support member 6 are provided. By screwing the bolt hole 6a thus formed with the bolt 20, the piston rod 13 and the braking support member 6 to which the braking member 4 is fixed are fixed.

Further, a reinforcing member 21 is laterally installed under the two hydraulic cylinders 11. The reinforcing member 21 is provided with a through hole 21a through which the braking member 4 can be moved up and down.

The stern portion 1c of the hull 1 is provided with an attachment holding portion 22 for holding the hydraulic cylinder 11. The lifting device 5 and the reinforcing member 21 for holding the lifting device 5 are fixed to the mounting holding portion 22 provided on the stern portion 1c, whereby the lifting device 5 and the reinforcing member 21 are mounted on the hull 1.

The operation of the marine vehicle braking structure of the present invention constructed as described above will be described.

When the propulsive force of the ship is decelerated and stopped, the propelling screw 2 is rotated in the reverse direction to decelerate and stop, but a long control distance is required when decelerating and stopping. . At this time, by turning on a switch inside the driver's cab, the locking receiving portion 8 on the upper portion of the braking support member 6 is released from the locking portion 9 that is always locked to the tip of the stern 1c by an electromagnet. To be done. When the pump 15a operates, oil flows from the hydraulic tank 17a into the upper chamber 18a of the hydraulic cylinder 11, which is the lifting device 5, via the pipe 16a. As a result, the cylinder 12 lowers the piston 14 and the piston rod 13. As a result, the braking member 4 is lowered into the sea in the direction perpendicular to the sea surface. At the same time, the oil in the lower chamber 19 inside the cylinder 12 returns to the hydraulic tank 17b through the pipe 16b from the oil delivery inlet hole 19a in the lower portion. At this time, a check valve 23b is provided in the pipe 16 to prevent hydraulic backflow.

As a result, the braking member 4 that has descended into the sea becomes a resistance against the propulsive force of the ship, the propulsive force of the ship is significantly reduced, the ship is quickly decelerated, and the braking distance is short. You can stop.

At this time, the arcuate notch 4a in the lower part of the braking member 4 is for preventing the reverse rotation thrust of the screw 2 from being impaired.

Further, when the deceleration and stop of the vessel are completed, or when the forward movement and the reverse movement of the vessel are started, the braking member 4 that has been lowered into the sea must be pulled up. This operation is performed by turning on a switch in the driver's cab, so that the pump 15b operates and oil flows from the hydraulic tank 17b into the lower chamber 19 inside the cylinder 12 as the lifting device 5 through the pipe 16b. The piston 14 is lifted by the hydraulic pressure in the lower chamber 19. As a result, the piston rod 13 is lifted, and the braking member 4 can be lifted from the sea. At this time, the hydraulic pressure in the upper chamber 18 inside the cylinder 12 returns to the hydraulic tank 17a from the oil delivery inlet hole 18a via the pipe 16a and the check valve 23a.

In the braking member 4 pulled up from the sea, the locking receiving portion 8 provided on the upper portion of the braking support member 6 is engaged with the locking portion 9 provided on the upper portion of the stern portion 1c by an electromagnet. Be stopped. As a result, the braking member 4 is pulled up from under the sea and is locked on the stern 1c so as to be able to move up and down.

The marine vehicle braking structure of the present invention configured as described above has a structure in which, in addition to the conventional reverse rotation of the screw 2, the braking member 4 is lowered into the sea in a direction perpendicular to the sea surface. The braking member 4 becomes a resistance against the propulsive force of. By significantly reducing the propulsive force of the ship by this resistance, the ship can be decelerated quickly and stopped at a short braking distance.

[0023]

[Effect of the device]

 The braking member for a marine vessel of the present invention configured as described above is mounted on the stern of the hull so that it can be moved up and down, and the braking member is lowered vertically to the sea surface and into the sea. Therefore, when the ship is decelerated and stopped, the braking member that has descended into the sea resists the propulsive force of the ship, the ship can be decelerated quickly, and the ship can be stopped at a short braking distance.

[Brief description of drawings]

FIG. 1 is a side view of a ship equipped with a ship braking structure of the present invention.

FIG. 2 is a view seen from the direction A in FIG.

FIG. 3 is an enlarged view showing a portion B of FIG.

FIG. 4 is an enlarged view showing a portion C of FIG. (A) A diagram showing a state before the electromagnet is released by turning on the switch. (B) It is a figure which shows the state which turned on a switch and the electromagnet was cancelled | released.

FIG. 5 is a plan view of a reinforcing member.

6 is a view seen from the direction D in FIG.

FIG. 7 is an operational view showing the operation of the marine vehicle braking structure of the present invention.

[Explanation of symbols]

 1 Hull 1c Stern 4 Braking member

Claims (1)

[Scope of utility model registration request] 1. A braking member is attached to a stern part of a hull so as to be able to move up and down, and the braking member is perpendicular to the sea surface, and
A marine braking structure characterized by being lowered into the sea.