JPH075116B2 - Ship tank unloading device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for loading loose bulk powders such as sand, gravel, ore, etc., from a ship's open cargo hold (hereinafter referred to as a tank) to landing or to another ship. The present invention relates to an unloading device for a tank to be transferred.

[0002]

2. Description of the Related Art A vessel unloading device is known in which a swing boom type grab bucket is installed near a vessel and an operator operates the swing boom type grab bucket to land the cargo in the vessel. ing.

[0003]

A swing boom type grab bucket requires complicated operations such as a boom swing operation and a grab bucket operation, and requires skill to operate. Since the swing boom type grab bucket has a limited boom swing range, the work range that can be landed is limited, and it is expensive to install multiple swing boom type grab buckets in the case of a large tank. . In the swing boom type grab bucket, since the boom, which is a heavy object, swings, the center of gravity of the ship shifts greatly, and the ship swings greatly, resulting in a deterioration of the work environment and a decrease in work efficiency.

Therefore, an object of the present invention is to provide a vessel unloading device which can solve the above-mentioned problems.

[0005]

[Means for Solving the Problems] Ships on the left and right sides of a tank 10
A conveyor belt conveyor provided in the front-back direction of the tank 10.
21 and the front and rear of the tank 10 across the left and right sides of the tank 10.
And the gate-shaped frame 26 provided so that it can run in the direction
Attached to the upper part of the boom 26 so that it can be moved up and down
The grab bucket 32 having substantially the same length as the width and the gate type flap
At the bottom of the lame 26, in the front-back direction with the grab bucket 32
The same position as the first position and the grab bucket 32 front and back
It is possible to run in the front-back direction over a second position that is separated in the direction
A feeder conveyor provided in the left and right direction of the tank 10.
39, provided on the upper part of the feeder conveyor 39
Hopper 4 traveling with the feeder conveyor 39
A vessel unloading device configured from 0 .

[0006]

[ Operation ] Feeder conveyor 39 as second position
Grab bucket 32 is lowered to load the cargo in tank 10.
The glove bucket 32 in that state
A. After rising above 35 and hopper 40, the fee
Set the conveyor 39 and hopper 40 as the first position.
Load the cargo in the bucket 32 into the hopper 40 and
It falls on the feeder conveyor 35 and the feeder conveyor 3
9 Drops the load onto the conveyor belt conveyor 21 and carries it out.
Repeatedly, the gate-shaped frame 26
Unloading the cargo in the tank 10 by traveling in the front-back direction
It

[0007]

[Example] Fig. 1 shows a sand sampling ship, in which a hull 1 is provided with a sand pipe 3 made of steel pipe through a bendable hose 2.
A sand pump 4 as a pump is provided at the tip of the steel pipe sand pipe 3 to provide a pumping equipment 5, and a wire 6 connected to the steel pipe sand pipe 3 is fed from a not-shown davit on the hull 1. As a result, the sand pump 4 is landed on the seabed, and the sand on the seabed is slurried and sucked up. The sucked sand is discharged from the hose 2 to the sorting machine 7 of the hull 1 to separate a large lump by the wire net 8, and the remaining sand-containing water is discharged through the chute 9 into the tank 10 by the chute 9.
Sand 11 of the sand-containing water discharged into the ship tank 10 settles in the ship tank 10, and the water overflows from the ship tank 10 and is drained to the outside of the ship tank through the drain port. In this way, the sand on the seabed is sampled in the vessel 10, and the collected sand 11 in the vessel 10 is brought to the shore of the sand sampling vessel itself, or is docked with another vessel to be overloaded by the unloading device. Transfer.

The unloading device will be described with reference to FIGS. 2 and 3. The tank 10 is long in the front-rear direction and short in the left-right direction, and the tracks 20 of the required lengths are installed in parallel on the decks 12 and 13 on the left and right sides of the tank 10, respectively. A conveyor belt conveyor 21 is installed outside the track 20 along the track 20. Traveling devices 23, 23 that travel along the track 20 are respectively attached to lower front and rear portions of the pair of left and right main frames 22, 22. Vertical frames 24, 24 are connected to each other, and an upper horizontal frame 25 is horizontally connected across the upper portions of the left and right vertical frames 24, 24 so as to run along the track 20. Are configured.

On the upper horizontal frame 25, a pair of left and right lifting drums 28 driven by a lifting electric motor 27 with a speed reducer, and a pair of left and right opening and closing driven by an opening and closing electric motor 29 with a speed reducer. Drums 30 are provided respectively, and the lifting rope 31 wound around the lifting drum 28 is attached to the glove bucket 32 from the vertical hole 25a of the upper horizontal frame 25.
The pair of buckets 35, 35 of the glove bucket 32 are opened and closed by the opening and closing cord 34 that is connected to the hanging cross member 33 and is wound around the opening and closing drum 30. The grab bucket 32 is slightly shorter than the lateral dimension of the vessel 10, and the lifting rope 31 is wound up and unwound so that the glove bucket 32 can be raised and lowered into the vessel 10 from a position above the vessel 10 and can be opened and closed. The pair of buckets 35 can be opened and closed by winding up and pulling out the cord 31.

A track 36 extending in the front-rear direction is provided on the left and right main frames 22, and a frame 37 is provided along the track 36 so that a traveling device 38 can travel back and forth. A feeder conveyor 39 facing in the direction and a hopper 40 located above the feeder conveyor 39 are attached to the vessel tank 10 in the left-right direction, and the feeder conveyor 39 has an end portion of the conveyor belt conveyor 21. A chute 41 located above is provided. Beneath the hopper 40 and feeder conveyor 39 grab bucket 32 shown in phantom in FIG. 2, i.e. the grab bucket 32 and the front-rear direction same
The first position, which has become one position, and the grab bar shown by the solid line in FIG.
Back and forth over a second position that is distant in the front and back direction from the ket 32
Enabling travel in a direction, the photoelectric sensor reflector 42 for the frame 37 is provided, the first and the main frame 22
The second photoelectric sensor transmitters / receivers 43, 44 are provided to constitute a photoelectric sensor for detecting that the hopper 40 has traveled to the first position and the second position. The glove bucket 32
A sensor 45 for detecting the remaining amount of the sand 11 in the ship tank 10 is provided in the. The remaining amount detecting sensor 45 is a distance measuring sensor such as a light beam type or a sound wave type that measures the distance to the sand 11 when the grab bucket 32 is at the uppermost position. The traveling devices 23 and 38 are provided with traveling electric motors 46 and 47 with built-in brakes, which are always in a braking state when stopped.
Each traveling device 23, 38 is of an independent drive system.

As shown in FIG. 4, an electric motor 27 for lifting and lowering
Load sensors 48 and 49 are provided on the opening and closing electric motor 29, and the detection signals of the load sensors 48 and 49, the remaining amount detection sensor 45, and the first and second photoelectric sensor transmitters / receivers 43 and 44 are controlled. An electric motor 27 for raising and lowering, an electric motor 29 for opening and closing, which is input to the device 50 and based on those signals,
The traveling electric motors 46 and 47 are controlled in operation.

Next, the operation will be described. As shown in FIG. 5, when the hopper 40 is in the second position, the photoelectric sensor reflection plate 42 reflects and receives the light from the second photoelectric sensor transmitter / receiver 44, and the traveling electric motor 47 is braked and stopped. The amount sensor 45 detects the remaining amount of the sand 11 in the tank 10, and when the sand 11 is directly below the grab bucket 32, outputs a feed signal to the electric motor 27 for raising and lowering to raise the drum 28 for raising and lowering. The rope 31 is rotated, and the rope 31 for raising and lowering is paid out, and the grab bucket 32 is lowered.

As shown in FIG. 6, when the bucket 34 of the grab bucket 32 plunges into the sand 11 in the vessel 10, the tension acting on the lifting rope 31 becomes weak and the lifting electric motor 2
The load acting on 7 is reduced, which results in a load sensor 48
Since the detection value of is decreased, the open / close motor 2
9 is driven to close and the opening / closing drum 30 is fed out and rotated to feed out the opening / closing cord 31 to close the pair of buckets 34 and grab the sand 11. When the pair of buckets 34 is closed, the tension of the opening / closing cord 31 is decreased and the load acting on the opening / closing electric motor 29 is decreased. As a result, the detection value of the load sensor 49 is decreased. Motor 27
A winding signal is output to the winding drum 28, and the drum 28 for raising and lowering is rotated to wind the rope 31 for raising and lowering the grab bucket 3.
Increase by 2.

As shown in FIG. 7, when the grab bucket 32 is at the uppermost position, the tension of the lifting rope 31 becomes large and the load of the lifting electric motor 27 becomes large, which is detected by the load sensor 48. Then, the lifting electric motor 27 is stopped by braking, and at the same time, the electric driving motor 47 is driven to drive the hopper 40 toward the first position.

As shown in FIG. 8, when the hopper 40 is at the first position, the light from the first transmitter / receiver 43 for the photoelectric sensor is reflected by the photoelectric sensor reflection plate 42 provided on the frame 37, whereby the light is received. The traveling electric motor 47 is stopped.

At the same time, as shown in FIG. 9, the electric motor 29 for opening and closing is driven to open, and the drum 30 for opening and closing is wound and rotated to wind the rope 31 for opening and closing to open the pair of buckets 34, 34. To do. This allows the grab bucket 3
The sand in 2 is thrown into the hopper 41, and the sand thrown into the hopper 41 is conveyed by the feeder conveyor 39, drops from the chute 41 onto the conveyor belt conveyor 21, and is conveyed by the conveyor belt conveyor 21. .

As shown in FIG. 10, a pair of buckets 3
When 4, 34 are fully opened, the tension of the rope 31 for opening and closing becomes large and the load of the electric motor 29 for opening and closing becomes large, and when this is detected by the load sensor 49, the electric motor 29 for opening and closing is stopped and at the same time for traveling. The electric motor 47 is driven to drive the hopper 40 toward the second position. At this time, the feeder conveyor 39 continues to convey the sand in the hopper 40.

As shown in FIG. 11, the hopper 40 has a second
When it comes to the position, the light emitting and receiving device 4 for the second photoelectric sensor 4 as described above.
4 detects and stops the electric motor 47 for traveling, and brakes. At the same time, the remaining amount sensor 45 detects whether or not there is sand 11 in the tank 10 just below the grab bucket 32, and when there is no sand, the electric motor 46 for traveling is driven to drive the gate-shaped frame 26. While the remaining amount detecting sensor 45 detects the presence or absence of sand 11 in the tank 10, the traveling electric motor 46 is stopped by the detection signal that the sand 11 is present, and at the same time, the glove bucket 32 is operated in the same manner as described above. Down. The above operations are continuously performed.

In the above automatic operation, a safety mechanism is provided for immediately stopping the automatic operation when an abnormality occurs in the detection signal, and the manual operation can be performed when the safety mechanism operates or during maintenance / inspection work. . In addition, when switching to automatic operation after manual operation, fully automatic operation cannot be performed unless the safety of the operating state is confirmed. A fall prevention mechanism for preventing the gate-shaped frame 26 from falling sideways is provided. Further, each unit may be driven by a hydraulic motor instead of the electric motor.

[0020]

EFFECTS OF THE INVENTION Traveling of the gate type frame 26, elevation of the grab bucket 32, feeder conveyor 39, hopper 40
Since it is sufficient to run the vehicle, those operations can be simplified and can be operated even by an unskilled person, and can be automated. Grab bucket 3 according to the size of the tank 10
Since the size of 2 and the travel distance of the gate-shaped frame 26 can be set, it can be applied to a large tank 10 or a small tank 10, and even in the case of a large tank 10, one grab bucket 32 and a feeder conveyor 39 can be used. , Hopper 40
The cost can be reduced by providing only one gate-shaped frame 26 provided with. The grab bucket 32 is on the left of the tank 10.
Since the length is almost equal to the right width, the grab bucket 32
Left and right width in the tank 10 by moving up and down without moving left and right
You can grab loads in one direction at a time and unload them.
There is little change in the center of gravity in the right direction and the ship sways to the left and right.
It is possible to maintain a comfortable working environment because there is no
The efficiency can be improved. By increasing the length of the conveyor belt conveyor 21, it is possible to load far away.

[Brief description of drawings]

FIG. 1 is a perspective view of a sand sampling ship.

FIG. 2 is a front view of the unloading device.

FIG. 3 is a side view of the unloading device.

FIG. 4 is a control circuit diagram.

FIG. 5 is an operation explanatory diagram.

FIG. 6 is an operation explanatory diagram.

FIG. 7 is an operation explanatory diagram.

FIG. 8 is an operation explanatory diagram.

FIG. 9 is an operation explanatory diagram.

FIG. 10 is an operation explanatory diagram.

FIG. 11 is an operation explanatory diagram.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Ship tank, 21 ... Conveyor belt conveyor, 26 ... Gate type frame, 32 ... Grab bucket, 39 ... Feeder conveyor, 40 ... Hopper.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 54-136093 (JP, A) JP 55-115588 (JP, A) JP 63-12591 (JP, A)

Claims (1)

[Claims] 1. A front side and a rear side of the boat tank 10 on the left and right sides of the boat tank 10.
A conveyor belt conveyor 21 provided facing the direction and the tank 1
It is possible to run in the front-back direction of the tank 10 by straddling both left and right sides of 0.
The gate-shaped frame 26 provided and the upper part of the gate-shaped frame 26
It is mounted so that it can be lifted up and down and is almost the same length as the left and right width of the vessel
Sauna grab bucket 32 and below the portal frame 26
The same position as the grab bucket 32 in the front-back direction.
The first position and the grab bucket 32 are separated from each other in the front-rear direction.
The tank 1 is provided so as to be capable of traveling in the front-rear direction across the second position.
0 and the feeder conveyor 39 facing left and right,
It is installed on the top of the feeder conveyor 39
An unloading device for a vessel, which comprises a hopper 40 that travels together with an NBEA 39 .