JPH0422754B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a coupling device for a split-bottom carrier ship, and more specifically, a cargo hold is formed by left and right hull parts whose upper parts are rotatably pivoted on a fixed hull part, respectively.
When dumping cargo, the bottom of the cargo hold is opened from the center line by rotating the left and right hull sections, and the bottom of the cargo hold is opened and closed in order to dump cargo such as sand, stone, ore, etc. This relates to a coupling device for the left and right hull sections.

BACKGROUND ART The above-mentioned bottom-split type dumping carrier has the advantage that it is convenient to dump cargo and the capacity of the cargo hold can be large relative to the size of the ship. However, in this type of carrier, conventionally, the opening/closing part between the left and right hull sections located at the bottom centerline of the cargo hold has been kept watertight only with rubber gaskets, and the left and right hull sections have been connected to a fixed hull section. Because the distance between the hinges is long, the left and right hull parts tend to bend and vibrate independently during sailing or when there is a shock.In such cases, the above-mentioned packing alone cannot maintain the watertightness of the opening/closing part of the cargo hold, causing the cargo hold to become watertight. Cargo may become wet due to flooding. Therefore, conventionally, the length of the cargo hold has been limited to around 30 meters and the loading capacity has been limited to 2 to 3,000 tons, which can be used for relatively small carriers, but there are problems that make it impossible to use for large carriers. Ta.

In order to solve the above-mentioned problem, the present applicant first proposed that the opening and closing ends of the left and right hull sections forming a cargo hold, which touch each other at the bottom center line, are removably connected to each other at intervals in the length direction. We are proposing a carrier ship equipped with a coupling device. (Japanese Patent Application No. 61-226900) Object of the Invention The present invention aims to improve the above-mentioned coupling device that connects the left and right hull sections to each other along the bottom centerline.
The purpose is to securely connect with greater force, facilitate locking and releasing operations, and simplify the structure.

Structure of the Invention In order to achieve the above-mentioned object, the present invention attaches the upper parts of the right and left hull parts, which form a rotating hull, to a fixed hull part through hinges, and rotates the left and right hull parts to mutually move them from the center line of the ship's bottom. In a split-bottom type carrier ship in which the bottom of the cargo hold is opened by separating the cargo hold, a coupling device is provided at the opening and closing ends of the left and right hull sections forming the bottom of the cargo hold, the coupling device being provided at the bottom center of the bottom of the left and right hull sections forming the bottom of the cargo hold. A metal object to be clamped is fixed to one of the opening and closing ends along the line, and the metal object to be clamped is formed with a locking part that protrudes in a T-shape from the opening end and is bent at right angles to both sides of the tip of the vertical axis, while the other A pair of clamp arms are rotatably supported and installed at the bottom opening/closing end, and first and second hydraulic cylinders are provided to individually rotate these clamp arms, and at right angles to the tip of each clamp arm. A bent locking portion is formed, and the locking portion is rotated to be clamped to the locked portion of the clamped metal object from both sides, and a hydraulic clamp is provided between the proximal end of the clamp arm. A clamp cylinder consisting of a third hydraulic cylinder that moves to be inserted into and removed from the pair of clamp arms is arranged, and a lock portion formed integrally with the clamp cylinder is pressed toward the proximal end of the clamp arm to close the tip of the clamp arm. The present invention provides a coupling device for a bottom-cracked carrier, characterized in that a side locking portion is locked in a clamp position.

Embodiments Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

The two-bottomed dumping carrier shown in Figure 1 is of the central hinge type, with 1 and 2 representing the left and right hull parts that form the rotating hull, and 3 and 4 representing the front and rear (bow and stern sides) that constitute the machine room, etc. 5 is a cargo hold formed by the left and right hull sections 1 and 2.

The above left hull part 1 includes an upper part 1a, a side part 1b, and a bottom part 1.
Similarly, the right hull section 2 consists of an upper part 2a, a side part 2b, and a bottom part 2c, and each upper part 1a, 2a
Hinge 8A, 8 is between the end of the support shaft 6A, 6B, 7A, 7B protruding from the upper surface of the fixed hull 3, 4.
B, 9A, and 9B are attached so that the left and right hull sections 1, 2 can rotate about the support shafts 6A, 6B, 7A, and 7B. In addition, the fixed hull portions 3, 4
Cylinder compartments 10, 11 are provided between the cargo hold 5 and the cylinder compartments 10, 11, and stepped portions 1a, 2d are formed at the bottoms 1c, 2c of the left and right hull sections constituting the cylinder compartments 10, 11, as shown in FIG. However, main hydraulic cylinders 12, 12 for opening and closing the cargo hold are installed between the stepped portions 1d, 2d. Therefore, by extending and operating the rods 12a of these hydraulic cylinders 12, the left and right hull sections 1 and 2 rotate as shown in the figure, and the bottom sections 1c and 2c move away from the bottom center line L to open the cargo hold 5. I have to.

A plurality of coupling devices 15 are installed at intervals in the longitudinal direction of the cargo hold 5 between the leading edges of the left and right hull bottoms 1c and 2c that come into contact and separate from each other about the bottom centerline L of the cargo hold 5. are doing. The coupling device 15
If the length S in the longitudinal direction of the cargo hold 5 is long, a large number of them may be provided, and if it is short, one may be provided. In this embodiment, the total length of the carrier is 101 meters, the length S of the cargo hold 14 is 56 meters, and four coupling devices 15 are provided at required intervals.

The coupling device 15 is configured so that the coupling device 15 can be locked and released by remote control simply by pressing an operation switch (not shown) attached to a machine room 16 provided in the fixed hull 4 on the stern side. .

The coupling device 15 has the structure shown in FIGS. 4 and 5, and has a metal object 17 fixed to the tip of the left hull bottom 1c. The metal fitting 17 to be clamped has a shape as shown in the figure, and has a T-shaped locking part 17a protruding from the opening/closing end along the center line of the ship's bottom, and a horizontal shaft 17a-2 at the tip of the vertical shaft 17a-1.
, and horizontal shafts 17 are provided on both sides of the upper end of the vertical shaft 17a-1.
Locked edge 1 bent at right angle between a-2
7b and 17b are provided. On the other hand, a locking portion 17 for the metal object 17 to be clamped is provided on the bottom portion 2c of the right hull portion.
Clamp arms 18 and 19 that lock onto a from both sides
is rotatably supported and attached by support shafts 20 and 21. These clamp arms 18, 19 are provided with brackets 18a, 19a protruding from the outer surface, and first and second hydraulic cylinders 2 for the arms are provided.
Piston rods 24 and 25 of 2 and 23 are rotatably mounted. When the actuating rods 24 and 25 are pushed forward, the clamp arms 18 and 19 have locking portions 18b and 19b formed by bending at right angles at their respective tips, and locking portions 18b and 19b of the clamp arms 19, which are bent at right angles, engage the locking portion 1 of the metal object to be clamped, as shown by solid lines in the figure.
When the piston rods 24, 25 are pulled back, the clamp arms 18, 19 are fixed to the locked surface 17b of the clamp arm 7a, as shown by chain lines in the figure.
rotates, and the locking portions 18b, 19b are released from the clamped hardware locking portion 17a.
In order to lock the clamping state between the clamp arms 18 and 19 and the metal object 17 to be clamped, a clamp cylinder 26 of a third hydraulic cylinder is disposed between the base ends of the clamp arms 18 and 19 so as to be freely insertable and removable. A piston rod 2 that fits into the internal cylinder chamber of the clamp cylinder 26 and protrudes from the base end side.
The tip of the clamp cylinder 7 is fixed to the right hull bottom 2c, and the clamp cylinder 26 is pushed and pulled by supplying and discharging hydraulic pressure to the cylinder chamber. At the tip of the clamp cylinder 26, there is a lock part 2 as shown in the figure.
When the clamp cylinder 26 is pushed forward, it is inserted between the proximal ends of the clamp arms 18 and 19, and the lock portion 26a is inserted into the locking surfaces 18c and 19c on the inner surfaces of the proximal ends of the clamp arms 18 and 19. The locking surfaces 26b and 26c lock, stopping the rotation of the clamp arms 18 and 19 and locking them, while the locking portion 2 is locked when the clamp cylinder 26 is pulled back.
6a is removed from the proximal end side of the clamp arms 18, 19 and retracted, making the clamp arms 18, 19 rotatable.

The clamp cylinder 26 and the arm opening/closing cylinders 22, 23 are operated in conjunction with each other by a hydraulic circuit shown in FIG. The hydraulic circuit will be described in detail below.

Cylinder chamber 30a divided by piston rods 24, 25 of arm opening/closing cylinders 22, 23;
31a and a cylinder chamber 32a defined by the piston rod 27 of the clamp cylinder 26 are connected to the pipe line 3.
4 and a passage 3 bored in the piston rod 27
3a, and a sequence valve 35 is interposed in the pipe line 34. On the other hand, the other cylinder chambers 30b and 31 of the arm opening/closing cylinders 22 and 23
b and the cylinder chamber 32 of the clamp cylinder 26
b through a conduit 36 and a passage 33b bored in the piston rod 27.

The pipe line 34 communicates with the B port of each solenoid valve 37 for two 4-port, 3-position switching installed in parallel, while the pipe line 36 communicates with each solenoid valve 37.
It communicates with the A port of. The P port of the solenoid valve 37 is connected to the pressure line 38, and the T port is connected to the pressure line 38.
The port communicates with tank line 39. The pressure line 38 includes a pressure switch 40, a stop valve 41, and an accumulator 4.
2 is installed to control the hydraulic pressure supplied to the cylinders 22, 23, and 25 to a predetermined pressure. The solenoid valve 37 is automatically switched in response to detection signals from limit switches 43A and 43B that detect the operating distance of the clamp cylinder 26.

In addition, rubber gaskets 50 and 51 are attached along the contacting and separating end surfaces of the left and right hull bottoms 1c and 2c connected by the coupling device 15, and these rubber gaskets maintain watertightness when the cargo hold 5 is closed. ing.

Next, the opening/closing operation of the main coupling device 15 having the above configuration will be explained.

In the coupled state shown by the solid line in FIGS. 4 and 5, the solenoid valve 37 of the hydraulic circuit is located at the neutral position shown, and ports A and T are in communication.
Cylinder chamber 3 of arm opening/closing cylinders 22, 23
0a and 31a are filled with hydraulic pressure, the cylinder chambers 30b and 31b are communicated with the tank line 39, and the piston rods 24 and 25 are stopped at the forward position. Therefore, the piston rods 24, 2
Clamp arms 18 and 19 connected to 5 clamp the metal object 17 to be clamped at the illustrated position. In addition, the cylinder chamber 3 of the clamp cylinder 26
2a is filled with hydraulic pressure and the cylinder chamber 3
2b communicates with a tank line 39, so that the clamp cylinder 26 is in the forward position, and its lock portion 26a locks the clamp arms 18, 19 against rotation.

When you want to open the cargo hold 5 and dump the loaded cargo, use the remote control switch installed in the machine room 16.
Turn on. With this operation, the solenoid valve 37
is switched to the right in the figure, and port P communicates with port A and port T communicates with port B. Therefore, hydraulic pressure is supplied from the pipe line 36 to the cylinder chamber 32b of the clamp cylinder 26, and is also returned to the pressure oil tank line 39 of the other cylinder chamber 32a.
The clamp cylinder 26 moves backward and comes off from between the clamp arms 18 and 19, and the clamp arm 1
8, 19 rotations are possible. At the same time, the cylinder chambers 30b, 3 of the arm opening/closing cylinders 22, 23
Hydraulic pressure is supplied to cylinder 1b, and the hydraulic pressure in the other cylinder chambers 30a, 31a is returned to the tank line 39, and the piston rods 24, 25 are moved backward. In response to the operation of the piston rods 24 and 25, the lock by the clamp cylinder 26 is released as described above, so the clamp arm 18 moves clockwise about the support shaft 20 as shown by the chain line in FIG. The clamp arm 19 rotates counterclockwise about the support shaft 21, and releases the clamp of the metal object 17 to be clamped by each of the locking portions 18b and 19b.

When the hydraulic cylinder 12 provided between the left and right hull sections 1 and 2 is driven to extend the actuating rod with the coupling device 15 uncoupled as described above, the left and right hull sections 1 and 2 rotate and the bottom By gradually opening the tips of 1c and 2c, the metal object 17 to be clamped comes out from between the clamp arms 18 and 19.

When closing the cargo hold 5 after dumping the cargo, the hydraulic cylinder 12 is operated in the opposite manner to the above, and the bottoms 1c and 2c of the left and right hull sections 1 and 2 are closed. When the bottom end is closed via the gasket, the metal object to be clamped 1
7 protrudes toward the left hull side and is located between clamp arms 18 and 19 at the position indicated by the chain line in FIG. In this state, close the coupling device by remote control.
When turned on, the solenoid valve 37 moves to the left in the figure, and ports P and B, and ports T and A communicate with each other. Therefore, cylinders 22,2
Hydraulic pressure is supplied to and discharged from the cylinder chambers 3 and 26 in the opposite manner to the above, and the piston rods 24 and 25 move forward, and the clamp cylinder 26 also moves forward. At that time, a sequence valve 35 is installed in the hydraulic supply pipe 34.
first, the arm opening/closing cylinders 22, 2
3 to operate the piston rods 24 and 25, hydraulic pressure is supplied to the clamp cylinder 26 to move the clamp cylinder 26 forward. Therefore, the clamp arms 18 and 19 rotate in the opposite direction to the above without being interfered with by the clamp cylinder 26, and clamp the metal object 17 to be clamped with their locking portions 18b and 19b, and then the clamp cylinder 2
6 moves forward, enters between the clamp arms 18 and 19, and locks. When the clamp cylinder 26 moves forward a predetermined distance and reaches the lock position, the limit switch 43B detects this and closes the solenoid valve 3.
7 to the neutral position and maintains the clamped state.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but the left and right hull sections 1 and 2 may be rotatably attached to the fixed hull sections 3 and 4, and the structure shown in FIGS. 7 and 8 may be adopted. Needless to say, it can also be applied to That is, in the embodiment shown in FIGS. 7 and 8, the left and right ends of the fixed hull parts 3', 4' and the upper end parts of the left and right hull parts 1', 2' are connected by hinges 60,
The upper plate parts of the fixed hull parts 3' and 4' and the bottom parts 1'c of each of the left and right hull parts serve as hydraulic cylinders that are rotatably connected at 61 and open and close the left and right hull parts 1' and 2'. , 2'c are provided with hydraulic cylinders 62, respectively. As shown in FIG. 8, these hydraulic cylinders 62 have their base ends rotatably pivoted to a fixed hull part, and the tips of cylinder rods 62a that protrude downward are attached to the bottoms 1'c and 1'c of the left and right hull parts, respectively.
By extending the cylinder rod 62a, the left and right hull sections 1' and 2' are moved in the direction of the chain line in the figure, and the cargo hold 5 is opened. The cargo hold 5 is closed by contracting the cylinder rod 62a.

As described above, the coupling device according to the present invention is suitable as a device for coupling the left and right hull sections in a type of ship in which the left and right hull sections are rotated to open the bottom of the cargo hold to the left and right from the bottom center line. It can be adopted in

Effects of the Invention As is clear from the above description, the present invention provides a device for removably connecting the ends of the bottom of the left and right hull parts constituting the opening/closing part of the cargo hold in a dumping carrier with a split bottom. A clamp cylinder consisting of a set of two clamp arms and a hydraulic cylinder is provided, each of which is operated by a separate hydraulic cylinder, and each clamp arm locks the metal object to be clamped from both sides with the pair of clamp arms. In order to be able to lock the clamp arm to the metal object to be clamped with a large force, and to prevent the rotation of the clamp arm and lock it in the clamped state, a lock part is integrally formed in a part of the clamp cylinder, and the lock part is Because the part is locked to the clamp arm,
The clamp arm is locked with a strong force. In this way, the left and right hull parts are joined at intervals in the longitudinal direction along the center line of the ship bottom by means of a joining device that can be clamped with a strong force, so that the watertightness of the opening/closing part can be ensured. Therefore, the length of the cargo hold can be made longer than before, and the loading capacity can also be significantly increased compared to before.

It also has various advantages, such as the ability to extremely easily lock and release the coupling device by operating a remote switch.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a carrier ship according to the present invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, FIG. 3 is a sectional view taken along the line -- in FIG. 1, and FIG. 4 is a coupling device. 5 is a side view of the coupling device, FIG. 6 is a drawing showing the coupling device and the hydraulic circuit, FIG. 7 is a plan view similar to FIG. 1 showing another embodiment of the present invention, and FIG. FIG. 8 is a sectional view taken along the - line in FIG. 7. DESCRIPTION OF SYMBOLS 1... Left hull, 2... Right hull section, 3, 4... Fixed hull, 5... Cargo hold, 6A, 6B, 7A, 7B... Support shaft, 12... Hydraulic cylinder for cargo hold opening/closing, 15... Coupling device, 17... Hardware to be clamped, 18, 19... Clamp arm, 22, 23... Arm opening/closing cylinder, 24, 25... Piston rod, 26... Clamp cylinder, 26a... Lock portion, 27... Piston rod, 37... Solenoid valve.

Claims (1)

[Scope of Claims] 1. The upper parts of the right and left hull sections, which form a rotating hull, are attached to a fixed hull section via hinges, and the left and right hull sections are rotated and moved away from each other from the center line of the ship's bottom to open the cargo hold. In a split-bottom transport ship with an open bottom, a coupling device provided at the opening and closing ends of the left and right hull sections forming the bottom of the cargo hold, the opening and closing ends along the bottom center line of the bottom of the left and right hull sections. A metal object to be clamped is fixed to one of the opening ends, which has a locking part that protrudes in a T-shape from the open end and is bent at right angles to both sides of the tip of the vertical axis, while a pair of clamped parts are fixed to the other bottom opening and closing end. A clamp arm is rotatably supported and installed, and first and second hydraulic cylinders are provided to individually rotate these clamp arms, and a locking part bent at a right angle is provided at the tip of each clamp arm. The locking portion is rotated to be clamped from both sides to the locked portion of the metal object to be clamped, and between the proximal end side of the clamp arm is moved by hydraulic pressure the pair of locking portions. A clamp cylinder consisting of a third hydraulic cylinder that can be inserted and removed between the clamp arms is arranged, and a lock portion formed integrally with the clamp cylinder is pressed toward the base end of the clamp arm to lock the locking portion on the distal end side of the clamp arm. A coupling device for a bottom-split type carrier, characterized by having a configuration that locks in a clamp position.