JP2000211577A - Unloader for hold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the operation of an unloader that is applicable to larger holds, and unload holds even when its portal breaks. SOLUTION: Two portals 26 are installed for straddling travel motion over holds 10. The portals 26 each have a vertically movable grab bucket 32, and a feeder conveyor that has a traveling hopper 40 and is movable between a first position just under the grab bucket 32 and a second position separated from the grab bucket 32. With the end of the feeder conveyor situated above a longitudinal feed conveyor 21 laid along the holds 10, the portal 26 and feeder conveyor are moved back and forth, and the grab bucket 32 is moved vertically, so that the longitudinal feed conveyor 21 feeds cargo in the holds 10. A waiting area can be ensured to accommodate a broken portal 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the loading of bulk powder, granules and small lumps of sand, gravel, ore, coal and the like from a ship hull (open cargo hold) to a ship or to another ship. The present invention relates to a ship equipped with an unloading device for a tank to be transferred.

[0002]

2. Description of the Related Art There is known an unloading device for a hull in which a turning boom type grab bucket is installed at a position close to the hull, and an operator operates the turning boom type grab bucket to land the cargo in the hull. ing. Further, there is known a ship unloading device configured to unload cargo in a ship hull formed of one large portal frame.

[0003]

The turning boom type grab bucket requires complicated operations such as a boom turning operation and a grab bucket operation, and requires skill in operation. The swing boom type grab bucket has a limited boom swivel range, which limits the workable area for landing.In the case of a large tank, multiple swing boom type grab buckets must be installed, which is expensive. . The swing boom type grab bucket causes the ship's center of gravity to move greatly due to the swinging of the heavy boom, and the ship's swinging is large, resulting in a deterioration of the working environment and a decrease in working efficiency. The unloading device for a hull made up of a single large portal frame has a high center of gravity and makes the hull unstable. In addition, the height is increased due to the large size, and visibility is deteriorated. Also, if the gate-type frame breaks down, unloading becomes impossible.

Accordingly, an object of the present invention is to provide a ship equipped with a ship tank unloading device capable of solving the above-mentioned problems.

[0005]

A longitudinal feed conveyor 21 provided on one side of the hull 10 in the front-rear direction of the hull 10 is provided.
And two portal frames 26 provided so as to be able to travel in the front-rear direction of the hull 10 across the left and right sides of the hull 10 and one portal frame at the front and rear outside the hull on the deck. And a grab bucket 32 attached to the upper part of the portal frame 26 so as to be movable up and down, and a first position at the lower part of the portal frame 26 at the same position as the grab bucket 32 in the front-rear direction. A traveling hopper 40, which is provided so as to be able to travel in the front-rear direction over a second position separated from the glove bucket 32, the hopper 40, a feeder conveyor 39 extending in the left-right direction of the hull 10, and a feeder conveyor 39. An unloading device for a hull provided on an upper portion and configured to travel together with the feeder conveyor 39 is provided.

Since the traveling of the portal frame 26, the lifting and lowering of the grab bucket 32, and the traveling of the feeder conveyor 39 only have to be performed, their operations are simplified and can be operated by non-experts and can be automated. Become. It is an unloading device for a hull composed of two portal frames instead of one large portal frame, which lowers the center of gravity and stabilizes the hull. Further, the height is lower than that of the large portal frame, and the visibility is improved. In the event that one of the portal frames fails, the failed portal frame is stored in the standby area, made to stand by, and the load can be unloaded by the other portal frame. Since the grab bucket 32 merely moves up and down, the position of the center of gravity of the ship is less changed, and the ship does not swing, so that a comfortable working environment can be maintained and work efficiency can be improved.

[0007]

1 and 2 are a front view and a plan view of a ship to which a discharge device according to the present invention is attached. A longitudinal feed conveyor 21 provided on one side of the hull 10 in the front-rear direction of the hull 10, and two units provided so as to be able to run in the front-rear direction of the hull 10 across the left and right sides of the hull 10. A portal frame 26 is provided. A vertically movable grab bucket 32 is mounted near the front and rear of the portal frame 26, and a standby area 3 for storing one portal frame is provided before and after outside the hull 10 so that it can be raised and lowered above the portal frame 26. The grab bucket 32 attached to the glove bucket 32 is provided at a lower portion of the portal frame 26 so as to be able to travel in the front-rear direction over a first position that is the same position as the grab bucket 32 and a second position that is separated from the grab bucket 32. The traveling hopper 40 and the hopper 40
Feeder conveyor 39 heading toward the side of hull 10
And an unloading device for a hull provided above the feeder conveyor 39 and traveling with the feeder conveyor 39. The waiting area 3 is provided with running rails 20 laid before and after on and off the hull 10. The load 11 makes the ship itself berth or berths with another ship and is transported outboard by a discharge device. The waiting area 3 is provided before and after the outside of the hull 10, and in the event that one portal frame fails, the failed portal frame is stored in the standby area, and the unloading operation is performed by another portal frame. Activate.

The unloading device will be described with reference to FIGS. The hull 10 is longer in the front-rear direction and shorter in the left-right direction.
A traveling rail 20 having a length up to a standby area capable of storing two portal frames is installed in parallel with each other, and the vertical feed conveyor 2 is provided outside the traveling rail 20 on the deck 12 on the berthing side.
1 is installed along the traveling rail 20. The traveling rail 20 is located at the lower part of the pair of left and right main frames 22,
A pair of left and right vertical frames 24, each having a substantially downward V-shape, are respectively connected to upper portions of the main frames 22 near the front and rear. An upper horizontal frame 25 is horizontally connected between upper portions of the vertical frames 24, 24 to form a portal frame 26 that can travel along the traveling rail 20.

On the upper horizontal frame 25, a pair of left and right lifting drums 28 driven by a lifting / lowering electric motor 27 with a reduction gear, and a pair of left and right opening / closing driven by an opening / closing electric motor 29 with a reduction gear. Lifting drums 30 are provided, and lifting ropes 31 wound around lifting drums 28 are grab buckets 32 through vertical holes 25 a of the upper horizontal frame 25.
The pair of buckets 34, 34 of the grab bucket 32 are opened and closed by an opening / closing rope wound around the opening / closing drum 30. The grab bucket 32 is capable of moving up and down the ropes 31 for lifting and lowering the grab bucket 32 from the position above the hull 10 into the hull 10 by unwinding and unreeling the ropes 31 for opening and closing. The pair of buckets 35 can be opened and closed.

A track 36 extending in the front-rear direction is provided on the left and right main frames 22. A frame 37 is provided along the track 36 so as to be able to run back and forth by a traveling device 38. Feeder conveyor 39 and a traveling hopper 40 located above the feeder conveyor 39 are attached to the hull 10 in the left-right direction, respectively.
9 is provided with a chute 41 located above the vertical feed belt conveyor 21. The traveling hopper 4
0 and the feeder conveyor 39 can travel in the front-rear direction over a first position directly below the grab bucket 32 indicated by a virtual line in FIG. 3 and a second position separated from the grab bucket 32 indicated by a solid line in FIG. The frame 37 is provided with a reflection plate 42 for photoelectric sensor, and the main frame 22 is provided with first and second receivers 43 and 44 for photoelectric sensor, and the traveling hopper 40 travels to a first position and a second position. This constitutes a photoelectric sensor for detecting that the user has performed the operation. The grab bucket 3
2 is provided with a sensor 45 for detecting the remaining amount of the cargo 11 in the hull 10. The remaining amount sensor 45 is a distance measuring sensor such as a light beam type or a sound wave type that measures the distance to the load 11 when the grab bucket 32 is at the uppermost position. The traveling devices 23 and 38 are equipped with traveling electric motors 46 and 47 having a built-in brake, and are always in a braking state when stopped, and each traveling device 23 and 38 is of an independent drive system.

A portal frame of the second type is shown in FIG. The grab bucket 32 is attached to a trolley 5 that traverses freely in a direction perpendicular to the traveling direction of the portal frame 26, and is operated in the operation room 4. The portal frame 26 is provided with an electric room 7 and a cable reel 6. As shown in FIG. 6, the electric motor 27 for raising and lowering and the electric motor 29 for opening and closing are provided with load sensors 48, 49, and the load sensors 48, 49 and the remaining amount sensor 4 are provided.
5 and the detection signals of the first and second photoelectric sensor transmitters / receivers 43 and 44 are input to the control device 50, and based on these signals, the electric motor 27 for raising and lowering, the electric motor 29 for opening and closing, and the electric motor 46 for traveling are provided. , 47 are controlled.

Next, the operation will be described. As shown in FIG. 7, when the traveling hopper 40 is at the second position, when the light from the second photoelectric sensor transmitter / receiver 44 is reflected and received by the photoelectric sensor reflecting plate 42, the traveling electric motor 47 is braked and stopped.
The remaining amount sensor 45 detects the remaining amount of the load 11 in the hull 10 and, when there is a load 11 immediately below the grab bucket 32, outputs a feed signal to the electric motor 27 for elevating and lowers the drum 28 for elevating. The pull-out rotation is performed, the lifting rope 31 is extended, and the grab bucket 32 is lowered.

As shown in FIG. 8, when the bucket 34 of the grab bucket 32 enters the load 11 in the hull 10, the tension acting on the lifting rope 31 is weakened, and the load acting on the lifting electric motor 27 is reduced. As a result, the detection value of the load sensor 48 decreases, so that the opening / closing electric motor 29 is closed and driven by the detection signal, the opening / closing drum 30 is extended, and the opening / closing rope 31 is extended to close the pair of buckets 34. To grab the cargo 11. When the pair of buckets 34 is closed, the tension of the opening / closing cable 31 is reduced, and the load acting on the opening / closing electric motor 29 is reduced.
Since the detected value of 9 decreases, a winding signal is output to the electric motor 27 for elevating and lowering with the detection signal, and the drum 28 for elevating and winding is rotated to wind the rope 31 for elevating and raise the grab bucket 32. .

As shown in FIG. 9, when the grab bucket 32 is at the uppermost position, the tension of the elevating rope 31 is increased and the load on the elevating electric motor 27 is increased, and the load sensor 48 detects this. Then, the lifting / lowering electric motor 27 is stopped, and at the same time, the traveling electric motor 47 is driven to travel the traveling hopper 40 toward the first position.

As shown in FIG. 10, when the traveling hopper 40 is in the first position, the light from the first photoelectric sensor transmitter / receiver 43 is reflected and received by the photoelectric sensor reflector 42 provided on the frame 37. As a result, the traveling electric motor 47 is stopped.

At the same time, as shown in FIG. 11, the opening / closing electric motor 29 is driven to open, and the opening / closing drum 30 is taken up and rotated to take up the opening / closing cable 31 to open the pair of buckets 34, 34. I do. Thereby, the load in the grab bucket 32 is thrown into the traveling hopper 40, and the load thrown into the traveling hopper 40 is conveyed by the feeder conveyor 39, falls from the chute 41 onto the vertical feed conveyor 21, and the vertical feed conveyor It is conveyed by 21. It is conveyed from the vertical feed conveyor 21 to the boom conveyor 2.

As shown in FIG. 12, a pair of buckets 3
When the opening and closing wires 4 and 34 are fully opened, the tension of the opening and closing rope 31 becomes large and the load on the opening and closing electric motor 29 becomes large. When this is detected by the load sensor 49, the opening and closing electric motor 29 is stopped and The electric motor 47 is driven to move the traveling hopper 40 toward the second position. At this time, the feeder conveyor 39 continues to convey the load in the traveling hopper 40.

When the traveling hopper 40 is in the second position, the second photoelectric sensor 44 operates to detect and stop the traveling electric motor 47 to perform braking, as described above. At the same time, the remaining amount sensor 45 detects whether or not there is a load 11 in the tank 10 immediately below the grab bucket 32,
When there is no load, the traveling electric motor 46 is driven to drive the gate-shaped frame 26 and the remaining amount sensor 45 detects the presence or absence of the load 11 in the hull 10, and travels with a detection signal indicating that there is a load 11. The electric motor 46 is stopped, and at the same time, the grab bucket 32 is lowered in the same manner as described above. The above operations are continuously performed.

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

[0020]

The traveling of the portal frame 26, the lifting and lowering of the grab bucket 32, and the traveling of the feeder conveyor 39 can be performed simply, so that they can be operated without a skilled person and can be automated. It becomes possible. Since the size of the grab bucket 32 and the traveling distance of the gate-shaped frame 26 can be set according to the size of the hull 10, it is possible to cope with the large hull 10 and the small hull 10. Even one grab bucket 3
The cost can be reduced simply by providing one portal frame 26 having the feed conveyor 2 and the feed conveyor 39. Since the grab bucket 32 only moves up and down, the position of the center of gravity of the ship does not fluctuate and the ship does not swing, so that a comfortable working environment can be maintained and the working efficiency can be improved. By making the vertical feed conveyor 21 longer, it is possible to carry the cargo far away. It is an unloading device for a hull composed of two portal frames instead of one large portal frame, which lowers the center of gravity and stabilizes the hull. In addition, the height is reduced due to the large size, and the visibility is improved. In the event that one of the portal frames fails, the failed portal frame 26 is stored in the standby area 3 and the other portal frame 26 allows the unloading of the cargo.

[Brief description of the drawings]

FIG. 1 is a front view of a ship to which a discharge device according to the present invention is attached.

FIG. 2 is a plan view of a ship equipped with the unloading device of the present invention.

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

FIG. 4 is a side view of the unloading device.

FIG. 5 is a front view of a second type portal frame.

FIG. 6 is a control circuit 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.

FIG. 12 is an operation explanatory diagram.

[Explanation of symbols]

 3 Standby area 5 Trolley 10 Tank 20 Running rail 21 Vertical feed conveyor 26 Gate type frame 32 Grab bucket 39 Feeder conveyor 40 Running hopper 50 Control device.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Eiichi Takatsuka, Inventor Eiichi Takakaka 2-3-6, Akasaka, Minato-ku, Tokyo Inside Komatsu Drainage System Co., Ltd. (72) Inventor Hitoshi Hoshino 2-3-6, Akasaka, Minato-ku, Tokyo (72) Inventor Toshihisa Naruse 2-3-6 Akasaka, Minato-ku, Tokyo Inside the Komatsu Manufacturing Co., Ltd. (72) Inventor Tatsuya Kudo 2-3-6 Akasaka, Minato-ku, Tokyo Komatsu Corporation F term in the factory (reference) 3F077 AA04 BA02 BA05 BA09 BB07 BB08 EA11 EA15 EA19 EA21 EA23 FA10

Claims (3)

[Claims] 1. A longitudinal feed conveyor 21 provided on one side of the hull 10 in the front-rear direction of the hull 10, and capable of running in the front-rear direction of the hull 10 across the left and right sides of the hull 10. Provided are two portal frames 26 provided, and a standby area 3 capable of storing one portal frame before and after outside of the hull on the deck,
A grab bucket 32 attached to the upper part of the portal frame 26 so as to be able to move up and down, and a lower part of the portal frame 26,
The first position at the same position in the front-rear direction with the grab bucket 32
A traveling hopper 40 provided to be able to travel in the front-rear direction over a second position separated from the position and the grab bucket 32;
The hopper 40 is provided with a feeder conveyor 39 extending in the left-right direction of the hull 10 and provided above the feeder conveyor 39 so as to travel together with the feeder conveyor 39. 2. The unloading device for a hull according to claim 1, wherein said grab bucket 32 is attached to a trolley 5 traversing movably in a direction perpendicular to a traveling direction of the portal frame 26. 3. The unloading device for a hull according to claim 1, wherein the failed portal frame 26 can stand by in the waiting area 3.