JP2002154663A - Unloading device for hold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unloading device for a hold preventing a fluctuation of an unloading quantity per unit time and efficiently utilizing a conveyance facility. SOLUTION: This unloading device is provided with a girder 26 provided travelably in the longitudinal direction of the hold 10 astride to both the right and left sides of the hold 10, a hopper 40 having a feeder conveyor travelable in the longitudinal direction in the girder 26 and traveled in the width direction of the hold 10, and a grab bucket 32 provided on the girder 26 and vertically moved between the inside of the hold 10 and an upper limit position. A vertical feed conveyor 21 travelable in the longitudinal direction is provided on one of decks 12 on the right and left broadsides of the hold 10, and the traveling speed of the feeder conveyor 39 is controlled to absorb the fluctuation of the carry-out quantity based on the change of the relative speed of the vertical feed conveyor against the longitudinal travel of the girder 26 and the hopper 40.

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, etc. from a ship hull (open cargo hold) to a landing or other ship. And a transfer device for a ship tank.

[0002]

2. Description of the Related Art Conventionally, a swing boom type grab bucket is installed at a position close to a conventional hull, and an operator operates the swing boom type grab bucket to discharge a load in the hull to a ship unloading device. Instead, see, for example,
No. 875, Japanese Patent Publication No. 2000-211577, and the like have also been developed a ship unloading device.

[0003] In this unloading device for a hull, a garter having a gate-shaped frame structure is installed so as to be able to run in the front-rear direction across the left and right sides of the hull. A glove bucket is vertically suspended above the gutter so as to be able to move up and down, and a hopper is installed inside the gutter so as to be able to travel in the front-rear direction. A feeder conveyer is provided below the hopper in a direction crossing the hull, and a first position below the grab bucket and a second position separated from the grab bucket together with the hopper.
It is made possible to travel between the positions. The end of the feeder conveyor faces a conveyor belt conveyor extending on a deck on one side of the hull.

According to this unloading device, the garter is caused to travel in the front-rear direction to confirm the presence of luggage in the hull, determine the next unloading position, and stop. Here, the user grabs the baggage by lowering the glove bucket while keeping the glove bucket open, so that the glove bucket rushes into the luggage in the hull. When the grab bucket grabs the load, it rises to the upper limit position. Next, the hopper travels toward a first position, which is a position directly below the grab bucket. When the hopper reaches the first position, the grab bucket is opened, and the luggage grasped by the bucket is thrown into the hopper.

When a load is loaded into the hopper, the hopper moves from the first position directly below the grab bucket to the second position. The load put in the hopper is conveyed by the feeder conveyor, falls on the vertical feed conveyor, and is transferred to the target transfer position via the vertical feed conveyor or another conveyor not shown in the drawing. These operations are performed automatically according to a preset sequence or by an operation of an operator.

[0006]

By the way, a conventional unloading device of this type discharges and loads a load carried into a hopper from a hull by means of a feeder conveyor or a vertical feed conveyor driven at a constant speed. I have. While the vertical feed conveyor runs in one direction, the feeder conveyor is affected by the movement of the garter in the front-rear direction and the movement of the hopper between the first position and the second position. It will fluctuate greatly.

In other words, the various conveyors for transport in the conventional unloading device for a hull run at a predetermined constant operating speed, and the unloading amount from the hopper is not particularly controlled. The amount of unloading per hour frequently and greatly fluctuates due to the movement of each transport equipment. As a result, the unloading efficiency is reduced.

In addition, when the capacity of the transfer equipment is insufficient, problems such as spillage and operation stoppage occur, and in order to prevent this, it is necessary to adjust the transfer capacity to the maximum output amount among the variable output amounts. Would be a wasteful use.

The present invention has been developed to solve such a conventional problem, and more specifically, a hull in which the fluctuation of the unloading amount per unit time is eliminated and the efficient use of the transport equipment is realized. The purpose of the present invention is to provide an unloading device.

[0010]

This object is effectively achieved by the present invention according to claims 1 to 3. The invention according to claim 1 is a longitudinal feed conveyor provided on one side of the hull in the front-rear direction of the hull, and provided so as to be able to run in the front-rear direction of the hull over both left and right sides of the hull. A gutter, a grab bucket attached to the upper part of the girder and capable of moving up and down between the hull and the upper part of the girder, and a hopper having a feeder conveyor inside the gutter and extending in the left-right direction of the hull. Is characterized in that the speed of the feeder conveyor is controlled in accordance with the forward and backward movements of the garter to maintain a constant unloading amount per hour.

The factor that causes the largest variation in the unloading amount is the movement of the gutter in the front-rear direction. That is, when the moving direction of the garter and the traveling direction of the vertical feed conveyor are the same, the relative speed between the garter and the vertical feed conveyor decreases, and the transport amount of the load transferred by the vertical feed conveyor increases. On the other hand, when the moving direction of the garter and the traveling direction of the vertical feed conveyor are opposite, the relative speed between the garter and the vertical feed conveyor increases, and the transport amount of the load transferred by the vertical feed conveyor decreases.

Therefore, in the present invention, the running speed of the feeder conveyor is controlled in accordance with the change in the relative speed between the garter and the vertical feed conveyor, and the carry-out amount from the feeder conveyor to the vertical feed conveyor is changed, so that the unit time It is intended to maintain a constant unloading amount.

Now, suppose that the traveling speed of the vertical feed conveyor is V
(Constant), running speed of the feeder conveyor is v (change),
When the moving speed of the gutter is S (constant), the running speed of the feeder conveyor is v when the moving direction of the gutter is the same as the running direction of the vertical conveyor, and the running speed is v 'when the moving direction of the vertical conveyor is opposite to satisfy the following equation. Acceleration and deceleration.

V / (V−S) = v ′ / (V + S) = α (constant) Here, α is a predetermined constant that is carried out by the vertical feed conveyor per unit time when the movement of the garter is stopped. Determined by the amount of unloading.

According to a second aspect of the present invention, the hopper is movable in the garter, the speed of the feeder conveyor is controlled in consideration of the movement of the hopper in addition to the movement of the garter, and the unloading amount per time is kept constant. It is characterized by maintaining.

As described above, the hopper usually moves from the first position to the second position or from the second position to the first position in the garter even during the movement of the garter. Therefore, the relative speed between the feeder conveyor attached to the hopper and the vertical feed conveyor also fluctuates in a complex manner.

Therefore, in the present invention, when the movement of the garter in the front-rear direction and the movement of the hopper in the front-rear direction are performed simultaneously, not only the traveling speed of the feeder conveyor is controlled in accordance with the movement of the garter, but also the movement of the hopper. Control is performed in consideration of the movement, so that the unloading amount per time is always kept constant.

As a method of accelerating or decelerating the traveling speed of the feeder conveyor, for example, (1) a traveling speed of the feeder conveyor corresponding to the movement of the garter and the hopper is set in advance, and a software for controlling the entire operation is provided. Alternatively, the traveling speed of the feeder conveyor is selected and commanded in accordance with the operation command of the sequencer. Or (2) A speed detector is attached to the gutter and the hopper, and the moving speed and moving direction of each are detected by the speed detector and fed back to change the running speed of the feeder conveyor.

A third aspect of the present invention is the invention according to the first or second aspect, further comprising an opening / closing gate at the discharge port of the hopper to make the discharge amount variable, so that the load in the hopper or on the feeder conveyor is provided. The opening / closing amount of the opening / closing gate of the hopper is changed in accordance with the amount of the hopper, and the amount of load carried out from the hopper to the feeder conveyor is controlled.

A weighing machine such as a conveyor scale using a load cell is attached to the feeder conveyor, the actual weight of the load conveyed by the conveyor is measured, and the opening / closing amount of the hopper opening / closing gate is changed according to the signal. At the same time, the traveling speed of the feeder conveyor is increased or decreased. Also, a weighing scale or a photoelectric detector is attached to the moving hopper, and the weight or capacity of the load in the hopper is detected, and the opening / closing amount of the opening / closing gate of the hopper and the traveling speed of the feeder conveyor are similarly changed. . Note that a weigh scale or a capacity meter may be installed on both the feeder conveyor and the hopper, and the opening / closing amount of the opening / closing gate of the hopper and the traveling speed of the feeder conveyor may be changed according to the detected amount.

[0021]

1 and 2 are a front view and a plan view, respectively, of a ship equipped with a ship tank unloading device according to the present invention.

Garter 26 consisting of a gate-shaped frame structure
However, it is installed so that it can run in the front-back direction of the hull 10 across the left and right sides of the hull 10. In the upper part of the gutter 26, the tank 10
A trolley 5 that can travel in the left-right direction is provided, and a grab bucket 32 is attached to the trolley 5 so as to be able to move up and down. Also, the grab bucket 32 may be provided directly above the gutter 26 in some cases. On the front and rear deck outside the hull 10,
Standby area 3 that can store one gutter 26 in each
Is provided.

Inside the gutter 26, a first position, which is immediately below the grab bucket 32, and a grab bucket 3 are provided.
The hopper 40 is installed so as to be able to travel in the front-rear direction of the hull 10 between a second position separated from the hopper 40 and the hopper 40.
Is provided with a feeder conveyor 39 that travels in the transverse direction of the hull 10 in the width direction.

The length of the hopper 40 may be approximately equal to the hull width or approximately equal to the length of the grab bucket 32. In the latter case, the grab bucket 32 is placed on the hopper 40.
The trolley 5 moves in the direction of the hull width so that the trolley can move and load a load.

The waiting area 3 is provided on the front and rear decks outside the hull 10 and is usually provided with a single unloading device. If the unloading device fails, the unloading device is moved to the waiting area 3. To facilitate the unloading operation by other means. In some cases, the standby area 3 is not provided.

Further, a plurality of unloading devices can be mounted. In this case, unloading devices other than the unloading device in operation are made to stand by in the standby area 3, and even if the unloading device in operation is broken, Can be replaced with the unloading device in standby, so that the unloading operation is not hindered. The luggage 11 is transported offboard using the unloading device, with the ship itself berthing or berthing with another ship.

The hull 10 is long in the front-back direction and short in the left-right direction. A traveling rail 20 extending in the front-rear direction is installed on the deck 12 on both the left and right sides of the hull 10. Further, a vertical feed conveyor 21 is installed outside the running rail 20 provided on the deck 12 in parallel with the running rail 20. At the front and rear ends of the lower part of the gutter 26, traveling devices 23 that are guided by the traveling rail 20 and travel are attached, respectively.
Has a structure that can be moved in the front-rear direction while straddling the hull 10 by the traveling device 23.

FIG. 3 specifically shows the structure of the unloading device. At the front and rear ends of the upper part of the gutter 26, rails 60 for trucks are installed in the left and right direction of the hull 10, and the truck 5 to which the traveling device 61 is attached runs along the rails 60. The rail 60 is installed over the entire width of the gutter 26, and the carriage 5 is guided by the rail 60 to travel, so that the unloading operation can be covered over the entire width of the hull 10. At this time, by overhanging the lateral ends of the grab bucket 32, the cargo at the left and right ends of the tub 10 can be easily unloaded. In some cases, a frame may be provided above the gutter 26 without providing the carriage 5, and the grab bucket 32 may be provided directly up and down.

An electric motor 27 for elevating and lowering equipped with a reduction gear is mounted on the carriage 5 provided so as to be able to run above the gutter 26.
Left and right bucket lifting drums 28 driven by the
And a pair of left and right bucket opening / closing drums 30 driven by an opening / closing electric motor 29 with a speed reducer, respectively. A lifting rope 31 wound around the bucket lifting drum 28 is connected to an upper horizontal frame. The pair of buckets 34 of the grab bucket 32 are opened / closed by opening / closing ropes 35 connected to the hanging horizontal member 33 of the grab bucket 32 through 25 vertical holes and wound around the bucket opening / closing drum 30.

The grab bucket 32 is used to move the rope 31 up and down.
The grab bucket 3 is wound up and fed out.
The pair of buckets 32a and 32b are opened and closed by raising and lowering the upper and lower positions of the tank 2 above the hull 10 and the inside of the hull 10, and winding and unwinding the open / close rope 35.

A track 36 extending in the front-rear direction is provided inside the gutter 26. Hopper support frame 37
Are arranged so as to be able to travel in the front-rear direction while being guided by the track 36 via a traveling device 38. The support frame 3
7 supports a feeder conveyor 39 extending in the left-right direction and a hopper 40 located above the feeder conveyor 39. The end of the feeder conveyor 39 has a discharge end above the vertical feed belt conveyor 21. A positioned chute 41 is provided.

The hopper 40 and the feeder conveyor 39
Can travel in the front-rear direction between 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. It has a traveling position detection system. The hopper traveling position detection system includes a support frame 3
7, a photoelectric sensor reflecting plate 42 is attached to the garter 26, and first and second photoelectric sensor receivers 43, 44 are attached to the garter 26, and a photoelectric sensor for detecting that the hopper 40 has traveled to the first position or the second position. A traveling position detecting device such as a sensor receiver is provided.

The grab bucket 32 has a hull 1
A sensor 45 for detecting the position of the package 11 within 0 is provided. As the position sensor 45, a distance measuring sensor such as a light beam type or an ultrasonic type which measures the distance between the grab bucket 32 and the package 11 immediately below is used. The traveling device 2
Each of the traveling devices 23 and 38 is provided with an independent drive system when the vehicle is stopped.

FIG. 4A shows an example of a pattern of operation timing of each equipment at the time of a normal unloading operation by the unloading device having the above configuration, and FIG. 4B shows the pattern of FIG. 4A. FIG. 3C shows an example of a conventional variation pattern of the unloading amount generated with the passage of time corresponding to the above. FIG. 4C shows a speed control pattern of the feeder conveyor for canceling the variation of the conventional unloading amount and maintaining a constant unloading amount. An example is shown. With respect to these patterns, the operation of each device will be specifically described according to the work procedure with reference to FIGS.

Now, as shown in FIG. 4A, the bucket lifting drum 28 and the bucket opening / closing drum 30
Takes up the luggage 11 with the pair of buckets 32a, 32b closed and lifts the grab bucket 32. When the grab bucket 32 reaches the upper limit position, a rotation sensor (not shown) detects the electric motor for lifting and lowering. 27 and opening and closing electric motor 2
9 is stopped by braking.

At the same time, the hopper traveling electric motor is driven to move the hopper 40 toward the first position directly below the grab bucket 32 as shown in FIG.
As shown in the figure, when the hopper 40 reaches the first position,
The light of the first photoelectric sensor transmitter / receiver 43 is supported by the support frame 37.
Is reflected and received by the photoelectric sensor reflecting plate 46, thereby stopping the hopper traveling electric motor.

On the other hand, at the same time as the grab bucket 32 reaches the upper limit position, the traveling electric motor is driven to drive the gutter 26 to the next gripping position as shown in FIG.

When the hopper 40 reaches the first position and the hopper traveling electric motor stops, the opening / closing electric motor 29 is driven to open, and the opening / closing drum 30 is extended to rotate and the opening / closing cable 35 is extended. 4A, the pair of buckets 32a and 32b are opened. Thereby, the load in the grab bucket 32 is thrown into the hopper 40, the load thrown into the hopper 40 is conveyed by the feeder conveyor 39, and falls from the chute 41 onto the vertical feed conveyor 21 traveling in one direction, It is conveyed by the vertical feed conveyor 21. Further, the load is transferred from the vertical feed conveyor 21 to the boom conveyor 2.

When the pair of buckets 32a and 32b are completely opened or the rotation speed of the opening / closing electric motor 29 or the opening / closing drum 30 immediately before the opening is detected by a rotation sensor (not shown), the opening / closing electric motor 29 is stopped. At the same time, a hopper traveling electric motor (not shown) is driven to drive the motor shown in FIG.
The hopper 40 is moved toward the second position as shown in FIG. At this time, the feeder conveyor 39 is
Continue transporting the load inside.

When the light emitting / receiving device 44 for the second photoelectric sensor detects and operates and the traveling position detecting device detects that the hopper 40 has reached the second position, the braking of the electric motor for hopper traveling is stopped, and A feeding signal is output to the electric motor 27 for elevating and lowering, the drum 28 for elevating and lowering is fed and rotated, and the rope 31 for elevating is drawn out to lower the grab bucket 32 as shown in FIG.

The buckets 32a, 32 of the grab bucket 32
When 2b comes close to the load in the hull 10, the rotation of the electric motor 27 is reduced, and the grab bucket 32 gently lands on the load. When the grab bucket 32 reaches the load, the bucket opening / closing electric motor 29 is driven to rotate the opening / closing drum 30 so that the opening / closing cable 35 is wound up. As shown in FIG. Bucket 34
Close and grab the load.

When the pair of buckets 32a and 32b are completely closed, a take-up signal is output to the opening / closing electric motor 29 and the lifting / lowering electric motor 27 according to the signal of a rotation sensor (not shown), and the bucket lifting / lowering drum 28 and the opening / closing drum 28 are output. The take-up / rotation rope 30 and the opening / closing rope 35 are taken up and rotated, and the grab bucket 32 is raised to the upper limit position.

At the same time as the grab bucket 32 reaches the upper limit position, the traveling device 6 follows a predetermined sequence.
1 is driven to move the carriage 5 laterally, or a driving electric motor (not shown) is driven to drive the gutter 26. The above operations are continuously performed.

Now, assuming that a sufficient load has been loaded into the hopper 40 and the feeder conveyor 39 is driven at a constant speed, the amount of the load carried out via the feeder conveyor 39 is constant. On the other hand, the vertical feed conveyor 21 runs in one direction at a constant speed. If the hopper 40 does not travel and the garter 26 does not move, the amount of load carried out to the vertical conveyor 21 is constant.

However, the hopper 40 is the vertical feed conveyor 2
The traveling in the direction coinciding with the traveling direction 1 and the traveling in the opposite direction are always repeated. That is, as described above, the hopper 4
0 reciprocates between the first position and the second position inside the gutter 26. The garter 26 also runs on the hull 10 simultaneously or in one direction in the direction corresponding to the running direction of the vertical feed conveyor 21, or runs in the opposite direction. Therefore, when the hopper 40 and the garter 26 travel in the same direction as the traveling direction of the vertical feed conveyor 21, the hopper 40 and the garter 26
, The relative speed of the vertical conveyor 21 becomes a difference between the respective traveling speeds, and the speed of the vertical conveyor 21 becomes relatively slow, and the carry-out amount of the load increases.

On the contrary, when the hopper 40 and the garter 26 run simultaneously or one of them runs in the direction opposite to the running direction of the vertical feed conveyor 21, the relative speed of the vertical feed conveyor 21 to the hopper 40 and the garter 26 Sum
The speed of the vertical feed conveyor 21 has been relatively increased, and the amount of unloading of the load per unit time has been reduced. In this manner, the amount of load carried out by the vertical feed conveyor 21 when the garter 26 and the hopper 40 travel is greatly changed, and particularly, the change in the amount carried out per unit time by the irregularly running garter 26 is caused by unloading. Significantly affects efficiency. Until the movement of the gutter 26 is completed and the lifting operation of the next grab bucket 32 is completed, there is basically no change in the carry-out amount of the load.

FIG. 4B shows a change in the carry-out amount when the garter 26 runs in the same direction as the running direction of the vertical feed belt conveyor 21. As you can see from the figure,
When the braking before the grab bucket 32 reaches the upper limit position is started, the hopper 40 starts moving to the first position, which is the opposite direction to the traveling direction of the vertical feed conveyor 21, and when the lifting of the grab bucket 32 stops. At the same time, the garter 26 starts moving in the same direction as the traveling direction of the vertical feed conveyor 21. Therefore, at this time, the hopper 4 of the vertical feed conveyor 21
The relative transport speed with respect to 0 and the gutter 26 is a speed obtained by adding the actual travel speed of the gutter to the difference between the actual travel speed of the vertical feed conveyor 21 and the actual travel speed of the hopper 40. Therefore, the carry-out amount at this time is smaller than the reference carry-out amount by the vertical feed conveyor 21 when the hopper 40 and the garter 26 are stopped, as indicated by A in FIG.

According to the illustrated example, the traveling speed of the hopper 40 is set higher than the traveling speed of the garter 26, and even if the hopper 40 reaches the first position, the traveling of the garter continues. Since the traveling directions of the hopper 40 and the garter 26 are opposite, after the hopper 40 stops at the first position, the relative transport speed of the vertical feed conveyor 21 to the garter 26 (hopper 40) becomes lower than the actual traveling speed, FIG. 4 (b)
As shown in B, the discharge amount of the load is larger than the reference discharge amount.

At the same time when the loading of the load from the grab bucket 32 into the hopper 40 while the garter 26 is running,
The hopper 40 starts traveling from the first position to the second position, which is the same direction as the traveling direction of the vertical feed conveyor 21. Immediately after the hopper 40 starts running, the gutter 26 stops. Therefore, also in this case, there is a time when the hopper 40 and the garter 26 run at the same time (see C in FIG. 3). However, the traveling directions of the hopper 40 and the garter 26 are both the same as the traveling direction of the vertical feed conveyor 21. Accordingly, in this case, the relative unloading speed of the vertical feed conveyor 21 to the hopper 40 and the garter 26 temporarily decreases, and the unloading amount of the load sharply increases as shown in FIG.

Even if the gutter 26 stops, the hopper 40 continues to travel in the gutter toward the second position by itself. During this time, the relative unloading speed of the vertical feed conveyor 21 with respect to the hopper 40 is changed from the actual traveling speed of the vertical feed conveyor 21 to the hopper 4.
Since the value becomes a value obtained by subtracting the actual traveling speed of 0, the actual traveling speed becomes slower, and as shown in D of the figure, the carry-out amount increases by the influence of the traveling speed by the hopper from the reference carry-out amount.
When the hopper 40 reaches the second position, thereafter, the reference discharge amount is maintained unless the grab bucket 32 grabs the load and starts moving the hopper 40 to the first position unless there is another factor. You.

FIG. 5 shows an example of a pattern of operation timing of each facility, an example of a variation pattern of the unloading amount, and a feeder for maintaining a constant unloading amount at the time of unloading work by the unloading device having the same configuration as described above. 4 shows an example of a conveyor speed control pattern. Here, the difference from the embodiment shown in FIG. 4 is that the traveling direction of the garter 26 is opposite to the traveling direction of the vertical feed conveyor 21, and the start / stop timing of each facility is the same as in the above embodiment.
As a result, the change in the unloading amount of the load is indicated by A ′ to FIG.
D '.

As shown in FIG. 5B, the change in the carry-out amount of the load is caused by the fact that the garter 26 travels in the direction opposite to the traveling direction of the vertical feed conveyor 21 contrary to the above embodiment. During traveling, the sum of the traveling speeds of the vertical feed conveyor 21 and the garter 26 is the relative speed of the vertical feed conveyor 21, and the relative speed is higher than in the above embodiment. As a result, the amount of load discharged from the feeder conveyor 39 to the vertical feed conveyor 21 in the areas A ′ and B ′ is significantly reduced, and the unloading amount is also reduced.

FIGS. 4 (c) and 5 (c) show an example of a speed control pattern of the feeder conveyor 39 for absorbing the above-mentioned fluctuation in the carry-out amount of the load. That is, areas A to D in which the carry-out amount of the load fluctuates, and A ′ to D ′
The traveling speed of the feeder conveyor 39 is varied in order to control the discharge amount from the feeder conveyor 39 in a pattern symmetrical with respect to the reference carry-out amount with respect to the variation curve of the carry-out amount of the load in the area.

The traveling speed of the feeder conveyor 39 can be controlled according to the sequence stored in the controller 50 in advance as a sequence curve.
A speed detecting device is arranged on each of the vertical feed conveyor 21, the garter 26 and the hopper 40, and the feeder conveyor 3 is provided.
A servo motor may be employed as the drive motor 9 to control the running speed of the feeder conveyor 39 in accordance with the running speed of each facility.

FIG. 6 is a flowchart showing a case where the running speed of the feeder conveyor 39 is controlled to follow the running speed of another facility in accordance with a change in the running speed. According to this figure, while confirming the traveling state and traveling direction of the garter 26, while confirming the traveling state and traveling direction of the hopper 40,
The running speed of the feeder conveyor 39 is sequentially increased and decreased.

In the unloading operation by these unloading devices, the hopper 40 usually feeds the feeder conveyor 39.
Although the amount of the load charged into the hopper is kept constant, the discharge amount from the hopper 40 may fluctuate depending on, for example, the load in the hopper, and if the traveling speed of the feeder conveyor 39 is controlled, the hopper In some cases, the amount of load inside the container may fluctuate greatly, and the amount of discharge to the feeder conveyor 39 may not be maintained constant.

Therefore, in the present invention, as shown in FIG. 3, an opening / closing gate 42 capable of changing the discharge amount of a load is provided in the hopper 40, and a weighing scale and a capacity meter (not shown) are provided in the vertical feed conveyor 21 and the hopper 40. While measuring the amount of load on the vertical feed conveyor 21 and in the hopper 40,
By controlling the opening / closing amount of the opening / closing gate 42 of the hopper 40,
In some cases, the unloading amount of the load is kept constant.

FIG. 7 shows that, in addition to controlling the running speed of the feeder conveyor 39 according to changes in the running speed of other equipment, the opening / closing gate 42 of the hopper 40 is simultaneously controlled.
2 shows a flowchart in the case of controlling the opening / closing amount of. According to this figure, the discharge amount of the hopper 40 is controlled while confirming the traveling state and traveling direction of the garter 26 and the hopper 40 as in FIG.

The above description merely shows typical embodiments of the present invention, and the present invention can be variously modified within the technical scope described in the claims. The illustrated speed patterns are also typical examples, and those patterns can be variously changed.

[Brief description of the drawings]

FIG. 1 is a side view of a ship to which a ship unloading device of the present invention is attached.

FIG. 2 is a plan view of a ship to which the ship unloading device of the present invention is attached.

FIG. 3 is an enlarged side view of a marine vessel discharging apparatus showing a typical embodiment of the present invention.

FIG. 4 shows an example of a start / stop timing in each equipment of a pallet unloading device as a typical embodiment of the present invention, a change in a load discharge amount due to a change in speed thereof, and a constant discharge amount. FIG. 4 is an explanatory diagram showing a control curve for performing the control.

FIG. 5 is a diagram showing another example of the start / stop timing of each equipment of the marine vessel unloading device, a change in the unloading amount of the load due to a change in the speed thereof, and a control curve for keeping the unloading amount constant. FIG.

FIG. 6 is a flowchart illustrating an example of a procedure of feeder speed control illustrated in FIGS. 4 and 5;

FIG. 7 is a flowchart illustrating an example of a procedure of controlling a gate opening amount illustrated in FIGS. 4 and 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ship 3 Standby area 5 Dolly 10 Hull 12 Deck 20 Travel rail 21 Vertical feed conveyor 23 Traveling device 25 Upper horizontal frame 26 Garter 27 Electric motor for raising / lowering 28 Drum for raising / lowering bucket 29 Electric motor for opening / closing 30 Drum for opening / closing 31 Lifting / lowering Cables 32 Grab buckets 32a, 32b buckets 33 Hanging horizontal members 35 Cables for opening and closing 36 Tracks 37 Support frames 38 Traveling devices 39 Feeder conveyors 40 Hoppers 41 Chutes 42 Opening and closing gates 43, 44 For first and second photoelectric sensors Transmitter / receiver 45 Position sensor 46 Reflector for photoelectric sensor 50 Control device 60 Rail 61 Traveling device

Continued on the front page (72) Inventor Toshiyuki Sawano 2-3F Akasaka, Minato-ku, Tokyo F-term in Komatsu Manufacturing Co., Ltd. 3F077 AA04 BA02 BA05 BA09 BB09 EA02 EA11 EA15 EA19 EA21

Claims (3)

[Claims] A longitudinal feed conveyor (21) extending on the left and right sides of the hull (10) and extending in the front-rear direction of the hull (10), and the left and right sides of the hull (10) (2) installed so as to be able to travel in the front-rear direction of the hull (10)
6), a grab bucket (32) attached to the upper part of the girder (26) and capable of moving up and down between the hull (10) and the upper part of the girder (26); A hopper (40) provided with a feeder conveyer (39) extending in the left-right direction of the hull (10), wherein the garter (26) has a feeder in response to a forward / backward movement. An unloading device for a hull, wherein the speed of the conveyor (39) is controlled to maintain a constant unloading amount per hour. 2. The feeder conveyor (39), wherein the hopper (40) is movable in the garter (26), and moves according to the movement of the garter (26) and the movement of the hopper (40).
2. The unloading device according to claim 1, wherein the speed is controlled to keep the unloading amount per time constant. 3. An opening / closing gate for varying the discharge amount is provided at an outlet of the hopper (40), and the opening / closing gate of the hopper (40) is opened / closed according to the amount of load in the hopper or on a feeder conveyor. The unloading device according to claim 1, wherein the unloading device controls an amount of the unloaded material from the feeder conveyor (39) of the hopper (40).