JP3463522B2 - Excavation control method for continuous unloader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously loading cargo in a hold.
And once stored in the hopper,
A continuous ann which is cut out and carried out to the ground side
The present invention relates to a loader excavation control method. [0002] 2. Description of the Related Art A cargo ship loaded on a quay docks in a cargo hold.
For the continuous unloading of waste such as iron ore and coal
For example, Japanese Unexamined Patent Publication No. Hei 8-290833 discloses a cargo handling facility.
Bucket elevator type continuous type as described in
Unloaders are known. [0003] This continuous unloader moves along a quay.
The swivel frame supports the swivel frame on the movable travel frame.
Boots that are held laterally from the revolving frame.
A bucket elevator is supported at the tip of the system. This
Bucket elevators have air inside the elevator shaft.
A chain that moves to and around the dress is provided.
The chain is provided with a bucket. And Choi
As the blades circulate, the lower part of the bucket elevator
In the provided excavation part extending horizontally such as L-shape
And the bucket scrapes off the debris in the hold,
It is carried to the top of the bucket elevator, from where the belt
Once stored in the hopper via the conveyor, the hopper
-A predetermined amount of powder is cut out from the
It is supposed to be. And the bucket elevator in the hold
By moving around the beta,
We try to scrape efficiently. [0004] The amount of excavation paid out to the ground side is controlled.
The control is the bucket orbiting speed or the traversing speed of the excavation part.
Excavation section side control to control the degree and cutting out from the hopper
It is performed individually by the cutout side control that controls the
Swelling. Here, in the excavation unit side control,
Must be balanced with the amount cut out from the hopper
Out of the hopper or the hopper
It is necessary to avoid bar flow.
You. Therefore, for example, the driving torque of a bucket elevator
Of the actual excavation at the excavation site by detecting
And the actual digging amount and the hopper level,
Depending on the combination with the quantity, the specified control logic was
Therefore, the traversing speed of the excavation section or the orbit of the bucket
The speed is controlled to increase or decrease. The control logic includes, for example, a continuous
Limitation of allowable load of loader body and position control system of excavation part
Restriction by upper limit of moving speed or hopper over
From the viewpoint of preventing flow, etc., the drive
Luke increases bucket circling speed at light torque
Element is weakened, and the bucket revolving speed at over torque
The load on the bucket elevator due to deceleration
It has become. [0006] Generally, the excavation part is held in a hold.
Combine reciprocating or circling movements within the load to medium
When unloading from the load to the bottom load,
Due to the influence, the excavation amount by the bucket may
Fluctuate. Also, the driving torque of the bucket elevator
When the light torque is low, the
Weakening the element,
I will strengthen the load control of the bucket elevator by deceleration
Excavation amount by the excavation unit
Is smaller than the amount cut out to ground equipment.
You. In addition, the control of the cutting amount to the ground side
Depending on the level, the belt feeder and
Control logic to control the operation / stop of the conveyor
Therefore, as shown in FIG.
In this state, the unloading stop is repeated and the stop time
The ratio is the actual value for the target cutout amount, that is, the cargo handling effect.
Rate. It is a factor that causes such a stoppage of unloading.
The actual value of the amount of excavation on the excavation side
If the excavation amount is less than the target excavation amount,
The target cutout amount on the feeder side is
If it is the rated ability value of the body, it is unavoidable. However, for example, due to restrictions on ground facilities, etc.
Because it is not possible to set the rated capacity
Even in the case, the excavation side according to the control logic
Of the excavation amount on the excavation side
It will be lower than the actual delivery amount. Therefore, actually
Can do more drilling,
The actual excavation amount on the excavation part side will be less than the cutting amount
As a result, there is a problem that the cargo handling efficiency is poor. Therefore, the present invention focuses on the above conventional problems.
That are operated at a rated capacity or less.
Possible to improve cargo handling efficiency in continuous unloader
To provide an efficient continuous unloader excavation control method.
The purpose is. [0010] [MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
In the excavation control method of the continuous unloader according to the present invention,
A chain with multiple buckets attached
The bucket elevator moves around the elevator
Excavation section provided below
To excavate the cargo in the hold, and
After being stored in the hopper,
Continuation that cuts out a fixed amount of load and pays it out to the ground side
In the excavation control method for an unloader,
Cutting efficiency detecting means for detecting cutting efficiency;
Target excavation amount by the cutting section
So that the cutout efficiency is equal to or larger than the cutout amount.
The target excavation amount is corrected according to the detection value.
It is characterized by: According to the present invention, the bucket elevator
Moved and orbits along this bucket elevator
Multiple buckets attached to a rotating chain
In the excavation section provided at the bottom of the ket elevator,
The cargo in the hold is scraped. Then, once this load is
After being stored in the par,
-The load is cut out by a predetermined amount from the
Will be paid out. At this time, for example, a predetermined time from the hopper
Unloading the load by detecting the
Extraction efficiency is detected by the extraction efficiency detection means.
The target excavation amount, which is the target value of the excavation amount
So that it is equal to or greater than the target cutout amount
Depending on the detection value of the cutting efficiency detection means, the target excavation amount
Corrected, that is, cut out by the cutout efficiency detecting means
Each time efficiency is detected, the target excavation amount is
Be updated. Therefore, the overflow of the hopper can be reduced.
The actual excavation amount is smaller than the actual cut-out amount for the purpose of prevention, etc.
Even when control is performed to reduce the size, the current
The target excavation amount is set according to the current cutting efficiency.
The hopper level
Of the hopper is reduced, and the occurrence of unloading of the hopper is suppressed.
The feed is stopped by the belt feeder.
And the cargo handling efficiency is improved. [0014] DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
I will tell. FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.
And the continuous unloader 7 is installed on the quay 1
The traveling rails 4a and 4b are driven by a hydraulic motor (not shown).
Traveling wheel having rolling wheels 9a and 9b
A frame 10 is provided. On the traveling frame 10, there are scattered objects inside.
Conveyor 11a for vertically transporting and descending
Centering on a line where the swirl tower 11 passes through the center of rotation and is orthogonal to the quay
It is supported to be able to turn left and right within a range of 125 °
And a hopper 12 is fixed below the turning tower 11.
The hopper 12 has a cutout on the lower end side.
Receives the dust in the hopper 12 and
Belt feeder that discharges fixed amount toward 5
) 13 are provided. And this belt fee
Upward direction of belt conveyor 5 received at drop position of da13
An in-machine conveyor 14 that conveys the dust to the
Scrap falling from the in-machine conveyor 14 of the
On the receiving belt conveyor 5 via the transfer frame
Will be transferred. At the upper end of the swirl tower 11, there is a scattered material inside.
The swiveling boom 15 provided with the feeding belt conveyor 15a
The pivoting boom 15 is rotatably supported in a vertical plane.
A balance weight 16 is provided on the opposite side of the swirl tower 11.
Have been. Inclined support links at both ends of the swing boom 15
17 and 18 are rotatably supported, and these links 17 and
At the free end of 18, a link 19 parallel to the turning boom 15 is turned.
Rollable link to form a parallel link, the free end of which
Bucket extending vertically to the side inclined support link 17
The elevator 20 is fixed. The bucket elevator 20 has a supporting ring.
And a cylindrical fixed frame 21 fixed to the
Elevator supported rotatably on fixed frame 21
And a cylindrical column member 22 constituting a shaft. A pair of front and rear chains are attached to the upper end of the column member 22.
Drive sprocket 23 is provided and
At the end, an L-shaped excavation portion 24 is provided, and inside the column member 22.
A pair of front and rear chains 25 pass through the sprocket 23
And extend around the excavation part 24.
A number of buckets 26 are arranged at predetermined intervals between pairs of chains 25.
It is kept and attached. The column member 22 is fixed to the fixed frame 2.
1 by a rotary drive mechanism such as a hydraulic motor
And the sprocket 23 is similarly driven by a hydraulic motor.
1 to rotate counterclockwise in FIG.
Is done. Further, the fixed frame 21 has a sprocket
The bucket turned upside down by the sprocket 23
A chute 27 is formed to receive the particles falling from the
The spatter guided by the chute 27 is
The swiveling boom 15 is provided by the rotating feeder 28 disposed therein.
To the conveyor 15a. The excavation part 24 is turned to the lower end of the column member 22.
Similar to the movably supported support frame 31 and its lower end
A horizontal support frame 32 rotatably supported on the
Guide the chain 25 to the left and right ends of the support frame 32
The sprockets 33 and 34 are attached, and the support frame
31 and 32 are rotated by a rotary drive mechanism such as a hydraulic motor.
Moving the horizontal support frame 32 to a horizontal state.
Can be moved in the front-rear direction while maintaining the position. Therefore, as shown in FIG.
Elevator 20 is inserted into hold A and horizontal support frame
The bucket 26 on the lower end side of the
And scrape it vertically through the column member 22.
To the bucket 26 at the upper sprocket 23 position.
Is turned over, and the splinters inside
7. The control inside the turning boom 15 via the rotary feeder 28
Transported to the conveyor 15a, and then to the conveyor in the swirl tower 11.
11a, it is lowered vertically and temporarily stored in the hopper 12.
Will be delivered. From the hopper 12, a belt feeder is provided.
13 on the ground equipment side such as the receiving belt conveyor 5
Quantitative discharge according to the receiving capacity is performed, and
And transferred to the receiving belt conveyor 5 via the
You. The belt feeder 13 is controlled, for example, by a control (not shown).
The drive is controlled by the device, and a predetermined amount of
It is controlled to cut out the load and the hopper 12
Driven according to the level of the level, the level is below the low level
When it becomes, the drive is stopped and the level is higher than the high level
When it returns to the state, the drive is restarted. Then, while performing these operations, the bucket
For example, moving the elevator 20 around the hold A
By doing so, the debris in the hold A can be sequentially carried out
It has become. The excavating section of the continuous unloader 7
As shown in FIG.
Drive mechanism 10b for self-propelling the arm 10 and the swivel tower 11
Of the rotary drive mechanism 11b and the rotary boom 15
Hydraulic cylinder 15b for controlling elevation angle, bucket elevator
Drive mechanism for rotating the column member 22 of the motor 20
Rotation drive for rotating the sprocket 22a and the sprocket 23
The driving of each of the mechanisms 23a is controlled by the control device 40.
It is controlled by control. The control device 40 includes the traveling frame 10
For example, the travel position is detected based on the travel distance from the reference position.
Outgoing travel position sensor 51, rotation drive mechanism of swivel tower 11
Turning angle sensor that detects the turning angle from the rotation speed of 11b
52, for example, attached to the swivel boom 15 and raised
Angle of inclination sensor 53 for detecting the angle, rotation of column member 22
A rotation angle sensor 54 for detecting a rotation angle of the drive mechanism 22a,
It is composed of a load cell for detecting the weight of the hopper 12, etc.
Load sensor 55, rotation drive mechanism 2 of sprocket 23
Example of detecting the driving torque attached to the rotating shaft of 3a
For example, each detection value of the magnetostrictive torque sensor 56 and the belt
Cut out from hopper 12 detected by feeder 13
At least an extension amount is input. And the control device 4
At 0, the position of the excavation unit 24 is determined based on these detected values.
The target is calculated and, for example, the rotation of the sprocket 23 shown in FIG.
The control logic of the rotation speed and the movement speed of the excavation unit 24 was adopted.
Accordingly, the rotation drive mechanism 10b of the traveling frame 10 is turned.
The rotary drive mechanism 11b of the tower 11 and the hydraulic system of the swing boom 15
A rotation drive mechanism 22a of the column member 22;
By appropriately driving the rotation drive mechanism 23a of the sprocket 23,
The excavation part 24 in the direction of scraping by the bucket 26
When moving at a predetermined speed in the direction in which
In both cases, the sprocket 23 is driven to rotate at a predetermined speed,
Excavation control is performed. In the control logic, as shown in FIG.
Of the sprocket 23 of the bucket elevator 20
Hopper 1 determined from torque and dust in hopper 12
2 according to the level of the bucket elevator 20
Controls the rotation speed of the ket 23 and the movement speed of the excavation unit 24
are doing. Specifically, the driving torque is 150% or less of the normal
Emergency stop of excavation when above, drive torque is 1
When it is 40% or more and less than 150%, stop excavation is performed. Ma
When the driving torque is 120% or more and less than 140%, or
Is that the driving torque is 100% or more and less than 120% and
If the level of the hopper 12 is higher than full,
Excavate. In addition, the driving torque is 100% or more and 120%
And the level of the hopper 12 is less than full
Or the drive torque is 80% or more and less than 100%
Steady when the hopper 12 is above the high level
Excavate. Moreover, the driving torque is 80% or more and 100% or less.
If full and the hopper 12 is below the high level,
Or, if the driving torque is less than 80%, speed-up excavation
I do. In addition, if the hopper 12 is
At some point, stop the rotation of sprocket 23
You. The level of the hopper 12 is shown in FIG.
As shown, a predetermined amount is cut by a belt feeder 13 described later.
Hopper low level, belt for stop timing of feeding
From the state where the cutting of the feeder 13 by a predetermined amount is stopped
High level for timing to return to logging start, excavation
Full level for deceleration control of section 24, emergency for upstream emergency stop
The level increases in the order of the full level, and
It is set to increase the number of things, and the very full level is hopper
12 represents the maximum value of the scatter that can be stored in
Satisfaction level and inflow amount h set by the following equation (1)
hd. [0029]     hhd = [(Q_{K *}−Q^*) × t₁/ 3600] × α (1) Note that Q in the equation_{K *}Is the target excavation amount, Q^*Is the target cutout
Quantity, t₁Is scattered from the rotary feeder 28 into the swirl tower 11.
Conveyance time before conveyance to conveyor 11a, α is safe
Coefficient (for example, 1.2 to 1.3). That is, until the deceleration control of the excavating section 24 is applied.
Between the belt conveyor 1 already via the bucket 26
5. Conveyance loaded on conveyor 11a etc. in swirl tower 11
Overflow occurs in the hopper 12 due to the dust inside.
The target excavation amount Q_{K *}And target cutout
Work Q^*And the transfer time t₁To the value integrated in
Multiplied by the rate α is set as the full level of the hopper 12
are doing. In the stop excavation, for example, the sprocket 2
3 is suppressed to about 75% of the specified value,
Stop moving. And the driving torque is 100% or less.
It returns to normal excavation when it falls below. Also, the low speed
In excavation, for example, the rotation speed of
85% and the moving speed of the excavation part 24
Suppress to about 0%. And the driving torque is 120% or less.
When the upper torque is less than 140%, the driving torque is 100% or less.
When it becomes, it returns to steady excavation and the driving torque is 100%
Is less than 120% and the hopper 12 is below the full level
When it was above, the driving torque was less than 100%
Steady when the hopper 12 is below the full level
Return to excavation. In the speed-up excavation, for example,
The rotation speed of the rocket 23 is as specified,
Only the moving speed of No. 4 is increased to the prescribed 120%. Soshi
When the driving torque is 100% or more,
Return. Therefore, in the control logic,
When the elevator drive torque is light, the bucket
Weaken the speed-up factor of the orbiting speed
Bucket elevating speed by reducing the bucket rotation speed
Control so that the load on the
You. In the control device 40, as shown in FIG.
Thus, the hopper 12 detected by the belt feeder 13
The cutout amount ΔQ is input to the excavation amount correction unit 41, and cutout is performed.
Cut-out amount actual value by integrating the amount ΔQ for a predetermined time
Q_REALIn other words, the cargo handling efficiency is calculated, and the calculated cutout is calculated.
Actual quantity Q_REALAnd target cutout amount Q^*Based on the ratio
Set the positive coefficient β. Then, the correction coefficient β and the target cutoff
Projection amount Q^*Is multiplied by the calculator 42 to obtain the target excavation amount.
Correction value Q_{K *}′ To the target torque converter 43.
You. In the target torque converter 43, the target excavation
Amount correction value Q_{K *}Based on the specific gravity of the
Positive value Q_{K *}′ To the target torque T^*And drive control
Output to the unit 45. The drive controller 45 includes a torque sensor 5
6 from the torque detection value T_BEAnd, for example, average this
Drive torque T_AVAnd target torque
Torque T from the torque converter 43^*And the load sensor 55
3 according to the level of the hopper 12 detected in FIG.
According to the control logic shown in FIG.
The rotation speed and the moving speed of the excavation unit 24 are controlled. Next, the operation of the above embodiment will be described with reference to the excavation amount.
Accompanied by the flowchart of FIG.
Will be explained. First, each rotation drive mechanism or hydraulic cylinder
And the like to drive the excavation section 2 of the bucket elevator 20.
4 into the upper end opening of hold A where the material is to be carried out
The excavator 24 is inserted at a predetermined position in the hold A,
You. Then, the transportation of the belt conveyor 5 and the like on the ground side is performed.
Target cutout amount Q according to the transport capacity of the transmission system^*And unloading
Set the information required for processing, such as the specific gravity of the scattered material. Soshi
And the target cutout amount Q^*That is, the target excavation amount Q_{K *}Based on
The excavation part 24 is fed sideways, and
Sea frame 10, turning tower 11, turning boom 1
5, drive the column member 22 and the sprocket 23 appropriately.
You. Thereby, the bucket 26 in the excavation part 24
The scraped scraps are mounted on the bucket 26,
Transported by the elevator 20 and lifted up by the bucket.
26 reaches the position of the sprocket 23 and turns upside down
When the state is reached, the dust stored in the bucket 26
Swivel boom 1 via chute 27 and rotary feeder 28
5 is transferred to the conveyor 15a in the
It is lowered vertically by the bearer 11a and
When stored. And, by the belt feeder 13,
A predetermined amount is cut out from the hopper 12, and this is
Transfer to the receiving belt conveyor 5 via the conveyor 14
Is done. During operation, for example, the level of the hopper 12 is
When the level falls below the preset low level shown in FIG.
In this case, the belt feeder 13
The cutting of the waste is stopped, and during this time, the bucket 26
Excavation continues, which causes the hopper 12
When the bell returns above the high level shown in FIG.
The cutout by the tofeeder 13 is restarted. The cutting by the belt feeder 13
The feeding amount ΔQ is sequentially integrated (step S1), and is fixed.
When the time has elapsed (step S2), the predetermined time has elapsed.
From the integrated value of
Actual delivery amount Q_REAL[Ton / H] is required (cut
Output efficiency detecting means). This cutout amount actual value Q_REALLotus
In other words, it indicates the cargo handling efficiency, and the actual value Q of this cutout amount_REAL
And the target cutout amount Q ^*Excavation ratio Q^*/ Q
_REALIs calculated (step S3). Next, the obtained excavation amount ratio Q^*/ Q_REALTo
For example, smoothing is performed by moving average, etc.
Next, the excavation amount ratio is subjected to a limiter process (step S4).
This is the target excavation amount Q_{K *}Excavation amount due to compensation of
Short-term fluctuations do not affect the hopper 12 overflow
That's why. The averaging-processed digging
The cutting ratio is the target excavation amount Q_{K *}Calculation as the correction coefficient β
(Step S5). by this,
In the arithmetic unit 42, the correction coefficient β and a predetermined target cutoff
Projection amount Q^*That is, the target excavation amount Q_{K *}Is multiplied by
Target excavation amount correction value Q_{K *}′ Is calculated and the target
Positive value Q_{K *}'Is the target torque T as the target excavation amount^*Converted to
This target excavation amount correction value Q_{K *}Target torque T according to
^*And the actual drive torque T _BEAnd each rotation to match
The drive mechanism or the hydraulic cylinder is controlled by the drive control unit 45
Driven according to the control logic of FIG.
And the circling speed of the bucket 26 is controlled. At this time, the actual cutout amount Q_REALAnd goals
Cutting amount Q^*Ratio Q^*/ Q_REALCorrection factor β according to
Therefore, the target excavation amount Q_{K *}Is to be corrected
From the actual cutting amount Q_REALIs the target cutout amount Q^*And so on
If so, the correction coefficient β = 1, and the target excavation amount correction value
Q_{K *}′ Is Q_{K *}'= Q_{K *}That is, the target cutout amount Q^*
And the excavation amount and the cutout amount are equal.
Is controlled as follows. On the other hand, the cutout amount actual value Q_REALIs the goal
Cutting amount Q^*Smaller, that is, the load
As the working efficiency decreases, the correction coefficient β increases,
Target excavation amount Q_{K *}Is corrected to a larger value, which
Is controlled so that the excavation amount is greater than the
You. Therefore, as shown in FIG.
When the driving torque of the elevator is
Weakened the speed-up factor of the rotation speed, when over torque
Of the bucket elevator by reducing the bucket circling speed
Control logic that controls to increase load suppression
If the control is performed according to
The value tends to be smaller than the actual value of the cutout amount
However, the smaller the actual value of the cutout amount is, that is,
Target excavation volume increases as cargo handling efficiency decreases due to
Value, the level of the hopper 12
This will suppress the reduction of the distance. Therefore, shown in FIG.
As such, the hopper 12 may be at a low level during operation.
As the hopper 12 is out of stock, the belt
The number of times the feeder 13 stops cutting is reduced.
Will be. Therefore, for example, due to a problem on the ground equipment side, etc.
Therefore, the amount of excavation falls below the rated capacity of the continuous unloader body.
Even when the drive is performed with the cutout amount suppressed,
Target excavation amount according to the actual value of
By setting the target cutout amount higher than
The hopper 12 can be prevented from being at a low level.
And increase or decrease the excavation volume according to the current cargo handling efficiency.
Can effectively set the amount of excavation
You. Further, a correction unit is set in accordance with the actual value of the cutout amount.
The number β is set, and the correction coefficient β is
Ratio Q^*/ Q_REALIs set by smoothing
Hopper 12 is turned off due to short-term fluctuations in
Overflow can be avoided. Also,
The full level, which is the timing of the deceleration control of the excavation unit 24,
The particles being conveyed between the excavator 24 and the hopper 12
Considering the setting, the excavation amount and cutting amount
Of the hopper 12 due to imbalance with the
Rows can be avoided. Further, the target excavation is performed in accordance with the actual value of the cutout amount.
Cutting amount Q_{K *}In the hold A
The raw material filling rate of the bucket 26 in the bottoming state of
The target excavation amount Q_{K *}Correct
The movement speed of the excavation part 24 and the bucket 26
Of raw material filling rate by controlling circulation speed
The amount of excavation decrease due to
In this case, it is also possible to improve the cargo handling efficiency. In the above embodiment, the cutout
The actual value of the cutting amount is calculated based on the cutout amount of the belt feeder 13.
Was described in the case of
Not limited to this, a new log is
A load sensor, such as a load cell, is installed and detection is performed based on the detected value.
It may be issued. In the above embodiment, the excavation amount
The actual value is used to rotate the rotation drive mechanism 23a of the sprocket 23.
The torque is directly detected by the torque sensor 56 mounted on the shaft.
Was described, but it is not limited to this.
No, for example, the drive current or drive oil of the rotary drive mechanism 23a
Detect pressure and indirectly detect drive torque
For example, the conveyor 15a of the swiveling boom 15
A load sensor is provided on the
It may be. In the above embodiment, the unit time
Target excavation amount Q according to the actual value of cutout amount per interval_{K *}
Has been described as being sequentially corrected.
For example, a series of cutout amounts from the start of digging to the end of digging
When the actual value is detected and excavation is performed under the same operating conditions
Target cutout based on the actual value of this cutout amount
Quantity Q^*And set the target cutout amount Q^*Digging based on
The amount of cutting may be controlled.
It is possible to expect improvement of working efficiency. Further, in the above embodiment, the control
When the device 40 is constituted by a plurality of control circuits,
Although the explanation has been made, the present invention is not limited to this.
Calculations are performed by a processor such as an
You may make it. [0050] As described above, according to the present invention,
According to the excavation control method of the type unloader, the target excavation amount
Extraction efficiency detection means so as to exceed the mark extraction amount
Target excavation amount according to the load extraction efficiency detected by
Hopper level, so that the hopper level
To prevent the hopper from running out of stock.
Accordingly, the cargo handling efficiency can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram showing an example of a continuous unloader to which a continuous unloader excavation control method according to the present invention is applied. FIG. 2 is a block diagram illustrating an example of a control device for a continuous unloader. FIG. 3 is an explanatory diagram illustrating an example of control logic for a moving speed of an excavating unit and a circling speed of a bucket of a bucket elevator in a control device. FIG. 4 is an explanatory diagram illustrating a level position of a hopper. FIG. 5 is a flowchart illustrating an example of a processing procedure of an excavation amount correction unit. FIG. 6 is an explanatory diagram for explaining a conventional problem. [Description of Signs] 1 Wharf 7 Continuous unloader 12 Hopper 13 Belt feeder 20 Bucket elevator 24 Excavation unit 40 Control device 41 Excavation amount correction unit 56 Torque sensor 55 Load sensor

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroaki Ishikawa 1-chome, Kawasaki-dori, Mizushima, Kurashiki-shi, Okayama Pref. (56) References JP-A 6-127699 (JP, A) JP-A-2-249812 (JP, A) JP-A-8-127432 (JP, A) JP-A-8-290833 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65G 67/60

Claims (1)

(57) [Claim 1] A chain to which a plurality of buckets are attached moves around in a bucket elevator, and a digging portion provided below the bucket elevator while moving the position of the bucket elevator. In the excavation control method of the continuous unloader, the load in the hold is excavated, and the excavated load is temporarily stored in the hopper, and then a predetermined amount of the load is cut out from the hopper by the fixed amount cutout unit and discharged to the ground side. A cutting efficiency detecting means for detecting the cutting efficiency of the load is provided, so that a target digging amount by the digging part is equal to or larger than a target cutting amount of the fixed quantity cutting part, according to a detection value of the cutting efficiency detecting means, An excavation control method for a continuous unloader, wherein the target excavation amount is corrected.