JPH09315588A - Continuous unloader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid damage of a facility of a unloader with the abnormal conveyance such as conveyance of foreign matters such as scraps mixed in piled loads. SOLUTION: A foreign matter detecting sensor 56 composed of an acoustic sensor for detecting the level of collision sound of piled loads is arranged on the lowering side of a topmost bucket in a bucket elevator and in the position with which the piled loads conveyed by a bucket 26 collides after being discharged with inversion of the bucket 26. When the measured sound level of collision sound is larger than the reference level preset according to the piled loads to be conveyed, that foreign matters such as scraps are mixed is judged and informed to a controller, and the controller stops the operation of respective rotational driving mechanisms and stops conveyance of the piled loads.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to iron ore in a hold,
The present invention relates to a continuous unloader for continuously discharging scattered cargo such as coal to the outside.

[0002]

2. Description of the Related Art In a bucket elevator type continuous unloader, a swing frame is swingably supported on a traveling frame movable along a quay, and a tip end portion of a boom projecting laterally from the swing frame. Bucket elevators are supported. The bucket elevator has its axis always in the vertical direction, and a chain with a plurality of buckets circulates inside the elevator shaft, and a bucket scraper formed at the bottom of the bucket elevator Scattered cargo such as coal or ore in the hold is scraped inside and is carried as it is to the top of the bucket elevator along the inside of the column member constituting the elevator shaft. Then, the bucket is reversed along with the chain that rotates along the sprocket at the uppermost part of the bucket elevator, and the load in the bucket is accompanied by the discharging chute provided at the uppermost part of the bucket elevator and the uppermost part of the bucket elevator. It is discharged to the rotary feeder arranged on the outer periphery of the.

The load discharged to the rotary feeder is
After transferring to the belt conveyor arranged on the boom, it is carried to the chute part of the revolving frame, transfers from the chute part to the vertical conveyor and once accumulated in the hopper, and then transfers to the in-machine conveyor to the ground side receiving conveyor. It is supposed to be carried out.

Further, since foreign materials such as scraps or long objects may be mixed in the cargo in the hold in the cargo hold, a magnetic separator is installed in the in-machine conveyor or the like, and scraps or long lengths are selected by the magnetic separator. Items are collected so as to avoid damages such as cutting of the belt of the receiving side conveyor due to these foreign matters.

[0005]

However, in the above conveyor on the boom or the vertical conveyor, in order to prevent the unloading of the slurry-like freight cargo or the pulverization of the sinter, the belt is moved in the traveling direction. Although a conveyor with a crosspiece is used in which a horizontal crosspiece is provided in a direction perpendicular to the belt and a corrugated corrugation is provided on both sides of the belt,
When foreign substances such as scraps transfer to the conveyor on the boom or the vertical conveyor, the foreign substances such as scraps are heavier than the ordinary scattered cargo, so the horizontal and corrugated lines are easily damaged, and the foreign substances are collected by the magnetic separator. However, there is a problem in that it is not possible to avoid damage to the equipment of the continuous unloader due to foreign matter.

Therefore, the present invention has been made in view of the above-mentioned unsolved problems of the prior art, and the unloader of the unloader is accompanied by abnormal transportation such as carrying foreign materials such as scrap mixed in cargo such as scattered cargo. It is an object of the present invention to provide a continuous unloader in which equipment is not damaged.

[0007]

To achieve the above object, in a continuous unloader according to the present invention, a chain to which a plurality of buckets are attached moves circularly along the inside of a bucket elevator, so that the bucket elevator is leveled. In a continuous unloader that scrapes the cargo in the cargo into each bucket with the scraping unit provided at the bottom while traversing in the direction, and transports the cargo to a predetermined place. Along with this, the apparatus is characterized by including abnormal conveyance detection means for detecting abnormal conveyance that damages the equipment of the continuous unloader in the bucket elevator.

In the present invention, when transporting scattered cargo, abnormal transport that damages the equipment of the continuous unloader due to transport is detected in the bucket elevator. If it is transported, equipment such as belt conveyors may be damaged in the transport process after the bucket elevator, but foreign matter such as scrap is detected as abnormal transport by the abnormal transport detection means when it is inside the bucket elevator. For example, by performing processing such as stopping the circulation of the chain, foreign matter is not transported after the bucket elevator, so the facility is not damaged.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 is a schematic configuration diagram showing an example of a continuous unloader according to the first embodiment of the present invention.

In the figure, A is coal, sinter ore loaded in the hold of a ship S such as an iron ore carrier, which is laterally attached to the quay 1.
Continuous excavation of scattered cargo (load) such as ore, and quantitative discharge of this to the ground side belt conveyor 5 that transports the scattered cargo to the raw material yard in parallel with the quay 1 on the ground side where the quay 1 is formed. Type unloader, two rails 4a, 4b laid between the quay 1 and the ground side belt conveyor 5
Thus, the vehicle has a traveling frame 10 arranged so as to be movable along the quay 1. The traveling frame 10 is self-propelled with the rolling wheels 9a and 9b rolling on the rails 4a and 4b driven by a hydraulic motor (not shown).

On the traveling frame 10, a vertical conveyor 11a for vertically conveying and lowering scattered cargo inside.
A swirling tower 11 having a built-in rotator is rotatably supported, and a hopper 12 is fixedly arranged below the swirling tower 11, and a cut-out port 12a on the lower end side of the hopper 12 has a scattered cargo in the hopper 12. The ground side belt conveyor 5
A belt feeder 13 for dispensing a fixed amount toward is provided.

The belt feeder 13 detects, for example, the total weight of the scattered cargo on the belt feeder 13, and the moving speed of the belt feeder 13 is increased by a drive motor or the like not shown so that the total weight becomes a predetermined weight. Alternatively, the deceleration is adjusted so that the scattered cargo having a predetermined weight is discharged toward the ground belt conveyor 5. An in-machine conveyor 14 that conveys the scattered cargo to the position above the ground-side belt conveyor 5 is disposed at the falling position of the belt feeder 13, and the scattered cargo that drops from the in-machine conveyor 14 passes through a cushion frame (not shown). And is transferred onto the belt conveyor 5 on the ground side.

At the upper end of the swivel tower 11, a swivel boom 15 having a belt conveyor 15a for conveying scattered cargo therein is rotatably supported in a vertical plane. Balance weight 16 on the opposite side
Are arranged. Inclined support links 17 and 18 are rotatably supported at both ends of the swing boom 15, and links 19 parallel to the swing boom 15 are rotatably connected to free ends of the links 17 and 18 to form parallel links. A bucket elevator 20 extending vertically is fixed to the inclined support link 17 on the free end side.

The vertical conveyor 11a and the belt conveyor 15b are conveyors with crosspieces in which horizontal crosspieces are provided perpendicular to the belt in a direction orthogonal to the traveling direction of the belt and wavy corrugations are provided on both sides of the belt. It is composed of.

The elevation angle of the swing boom 15 is adjusted by a hydraulic cylinder 15b interposed between the swing boom 15 and the swing tower 11. The bucket elevator 2
Reference numeral 0 denotes a cylindrical fixed frame 21 fixed to the support link 17, and a cylindrical column member 2 constituting an elevator shaft rotatably supported by the fixed frame 21.
And 2.

A pair of front and rear chain driving sprockets 23 are provided at the upper end of the bucket elevator 20, and an L-shaped excavating portion (scraping portion) 24 is provided at the lower end.
And a pair of front and rear chains 25 are stretched around the sprocket 23 and the excavation section 24 while passing through the column member 22. A large number of buckets 26 maintain a predetermined interval between the pair of chains 25. Have been installed.

The column member 22 is fixed to the fixed frame 2.
The sprocket 23 is driven to rotate by a rotary drive mechanism such as a hydraulic motor attached to the No. 1 and the sprocket 23 is also rotationally driven counterclockwise in FIG. 2 by a rotary drive mechanism such as a hydraulic motor.

Further, as shown in FIG. 2, the fixed frame 21 has a sprocket 23 below the sprocket 23.
A discharge chute 27 is formed to receive the scattered cargo discharged from the bucket 26 that has been turned over. Then, the scattered cargo guided by the discharge chute 27 is transferred to the conveyor 15a in the swing boom 15 by the rotary feeder 28 arranged at the lower end side thereof. Further, a damper 27a for opening and closing the upper opening of the discharging chute 27 is provided, and the opening and closing of the upper opening of the discharging chute 27 is controlled by an actuator (not shown) to clean the continuous unloader. It is designed to improve work efficiency during work.

Returning to FIG. 1, the excavation section 24 has a support frame 3 rotatably supported at the lower end of the column member 22.
1 and a horizontal support frame 32 that is also rotatably supported at the lower end thereof, and sprockets 33 and 34 that guide the chain 25 to the left and right end portions of the support frame 32, and the support frames 31 and 32 are connected to a hydraulic motor. The horizontal support frame 32 can be moved in the front-rear direction while being kept in a horizontal state by rotating the horizontal support frame 32 by a rotary drive mechanism such as.

Therefore, as shown in FIG. 1, the bucket elevator 20 is inserted into the hold 37, the bucket 26 at the lower end of the horizontal support frame 32 is brought into contact with the scattered cargo 35 and scraped off, and the column member is removed. When the bucket 26 is conveyed vertically upward through the inside 22 and the bucket 26 is inverted at the position of the upper sprocket 23, the cargo accumulated therein is conveyed through the discharge chute 27 and the rotary feeder 28 to the conveyor in the swing boom 15. 15a, then is vertically lowered by the vertical conveyor 11a in the swirling tower 11 and is primarily stored in the hopper 12.

From the hopper 12, the belt feeder 13 discharges a fixed amount according to the carrying capacity of the ground belt conveyor 5, and the paper is transferred to the ground belt conveyor 5 via the in-machine conveyor 14.

At the top of the bucket elevator 20, as shown in FIGS. 2 and 3, in the traveling direction of the bucket 26, near the position where the bucket 26 is reversed in response to the rotation of the chain 25 by the sprocket 23. On the other hand, side plates 41 are provided on both sides of the bucket 26.
The side plate 41 is composed of, for example, a plate member fixed to the uppermost portion of the bucket elevator 20 by a mounting member 41a or the like, and the bucket 26 is turned over so that the scattered cargo being transported inside the bucket 26 is transferred to the bucket 26.
It is designed to be prevented from falling from both sides and is provided in proximity to the bucket 26.

Further, on the lower side of the bucket 26 of the fixed frame 21, a foreign matter detection sensor (abnormal conveyance detection means) is provided near the position where the scattered cargo conveyed in the bucket 26 is discharged by reversing the bucket 26. ) 56 is attached. The foreign matter detection sensor 56 is configured to include, for example, a flat plate-shaped collision surface and an acoustic sensor such as a microphone. The collision sound when an object collides with the collision surface is measured by the acoustic sensor. When the level is larger than the reference level set according to the scattered cargo to be conveyed, it is considered that foreign matter other than the scattered cargo such as scraps or long objects is mixed, and this is notified to the control device 40.

The continuous unloader A is shown in FIG.
As shown in FIG. 4, a rotary drive mechanism 10b for self-propelling the traveling frame 10, a rotary drive mechanism 11b for driving the swing tower 11 to rotate, a hydraulic cylinder 15b for controlling the depression / elevation angle of the swing boom 15, and a column member 22 of the bucket elevator 20.
A rotation drive mechanism 22a for rotating the sprocket and a rotation drive mechanism 23a for rotatively driving the sprocket 23
It operates by controlling the drive.

The control device 40 includes a traveling frame 10
For example, a traveling position sensor 51 that detects a traveling position based on a traveling distance from a reference position, a swivel angle sensor 52 that detects a swivel angle from the rotational speed of the rotation drive mechanism 11b of the swivel tower 11, and a load cell that detects the weight of the hopper 12. A load sensor 53 configured, for example, an inclination angle sensor 54 attached to the swing boom 15 for detecting the depression / elevation angle thereof, a rotation angle sensor 55 for detecting the rotation angle of the rotation drive mechanism 22a of the column member 22, and the foreign matter detection sensor 56. At least each detected value of, is input. Then, the control device 40 calculates the position coordinates of the excavation section 24 based on these detected values, and the rotary drive mechanism 10b of the traveling frame 10, the rotary drive mechanism 11b of the revolving tower 11, the hydraulic cylinder 15b of the revolving boom 15, A rotary drive mechanism 22a for the column member 22,
The rotation drive mechanism 23a of the sprocket 23 is appropriately driven to move the excavation portion 24 in a direction orthogonal to the scraping direction of the bucket 26, that is, in the lateral direction at a predetermined speed, and at the same time, the sprocket 23 is rotationally driven at a predetermined speed to determine a fixed amount. Excavation control is performed.

Further, based on the load detection value of the load sensor 53 of the hopper 12, when this load detection value indicates that the hopper is full, the lateral feed of the excavation section 24 and the excavation by the excavation section 24 are stopped. Together with the foreign matter detection sensor 5
Even when the detection signal from 6 indicates that foreign matter is mixed, the lateral feed of the excavation unit 24 and the excavation by the excavation unit 24 are stopped.

Next, the operation of the first embodiment will be described. First, the rotary drive mechanism, the hydraulic cylinder, or the like is drive-controlled to move the excavation unit 24 of the bucket elevator 20.
The scattered cargo is inserted into the upper opening of the hold 37 to be carried out, and the excavation portion 24 is arranged at a predetermined position in the hold 37.

Then, based on the set cargo handling amount according to the transportation capacity of the transportation system such as the receiving belt conveyor 5 on the ground side and the material of the scattered cargo, the quantitative excavation amount corresponding to the scattered cargo and the ground side transportation capacity. The reference traverse speed of the excavation unit 24 and the reference rotation speed of the sprocket 23 are set, and the excavation unit 2 is based on the reference traverse speed and the reference rotation speed.
While traversing 4 sideways, rotate the sprocket 23,
The traveling frame 10, the swing boom 15, the column member 22, and the sprocket 23 are appropriately controlled so that the amount of excavation is constant. As a result, the scattered cargo scraped off by the bucket 26 in the excavation unit 24 is mounted on the bucket 26, conveyed by the bucket elevator 20 and lifted up, and the bucket 26 reaches the sprocket 23 position and is turned upside down. The scattered cargo stored in the bucket 26 is rotated by the rotary feeder 28 via the discharge chute 27.
The sheet is discharged to the upper side and is conveyed to the upper part of the hopper 12 via the belt conveyor 15a, and is transferred to the vertical conveyor 11a which is conveyed vertically downward and temporarily stored in the hopper 12, and then the belt is cut out from the cutout 12a of the hopper 12. A predetermined amount of scattered cargo is cut out by the feeder 13, and this is delivered to the receiving belt conveyor 5 via the in-machine conveyor 14.

At this time, when foreign matters such as scraps or long objects are not mixed in the scattered cargo in the bucket 26, as shown in FIG. When the scattered cargo in the bucket 26 is discharged from the bucket 26 and collides with the foreign matter detection sensor 56 due to the reversal, the scattered cargo that falls is, for example, an ore or the like having a uniform particle size, and therefore the foreign matter detection sensor 56 detects it. Since the measured sound level is lower than the reference level preset according to the conveyed object, the foreign matter detection sensor 56 notifies the control device 40 that there is no foreign matter.

Therefore, the control device 40 controls the sprocket 2
Continue to carry out the scattered cargo without stopping the driving of each part beginning with 3. From this state, the scattered cargo 35
When the foreign matter mixed in the bucket is scraped off by the excavator 24 and conveyed by the bucket 26, the bucket elevator 20
26 along with the inversion of the bucket 26 at the top of the
When the scattered cargo including foreign matter inside is discharged and the scattered cargo including foreign matter collides with the foreign matter detection sensor 56, the foreign matter is heavier than the scattered cargo. growing. Therefore, in the foreign matter detection sensor 56,
Since the measured sound level of the collision sound is higher than the reference level, the control device 40 is notified that the foreign matter has collided.

In response to this, the control device 40 stops the drive of each rotary drive mechanism and hydraulic cylinder. Therefore, since the foreign matter is stopped being conveyed at this point, the foreign matter is stopped before being conveyed to the belt conveyor 15a of the swing boom 15. Therefore, it is possible to prevent the corrugated rails or the horizontal rails of the belt conveyor 15a or the vertical conveyor 11a configured by the conveyor with the rail from being damaged by scraps or long objects.

Next, a second embodiment of the present invention will be described. The second embodiment is the same as the first embodiment except that an abnormal conveyance detection sensor (abnormal conveyance detection means) 57 is provided in place of the foreign matter detection sensor 56, and therefore the same parts are provided. The detailed description of is omitted.

As shown in FIG. 6, the abnormal conveyance detection sensor 57 is installed on the ascending side of the bucket 26 of the column member 22 below the rotary feeder 28. For example, as shown in FIG. 7, the bucket 26 is formed in a substantially rectangular parallelepiped shape with an open upper surface, and is formed so as to excavate scattered cargo at the upper end of the front surface facing the surface fixed to the chain 25. There is.

The abnormal conveyance detection sensor 57 is
As shown in FIG. 7, for example, it is composed of three sets of infrared sensors including a light emitting element such as an infrared LED and a light receiving element such as a photodiode. Then, the infrared sensor 57
a and 57b are respectively arranged at positions where the protrusions on both side surfaces of the bucket 26 can be detected, and the infrared sensor 57c is provided.
Is arranged at a position where the protrusion on the front side of the bucket 26 can be detected.

Then, each of these infrared sensors 57a-5
7c indicates the side plate 41 or other equipment in the bucket elevator 20 due to deformation of the bucket 26 or a projecting conveyed object such as a long object of the bucket 26,
In the transportation process after the bucket elevator 20, for example, the belt conveyor 15a in the swing boom 15,
The maximum range of the entire bucket including the vertical conveyor 11a and the in-machine conveyor 14 and the like, which can be regarded as not being damaged by the long object conveyed by the bucket 26 (hereinafter, maximum specified range) Is placed at a position defined by the infrared light of each infrared sensor 57a to 57c.

The infrared sensors 57a to 57c have the same structure, and are composed of a light emitting portion F ₁ having a light emitting element and a light receiving portion F ₂ having a light receiving element. And
When the abnormal conveyance detection sensor 57 is activated, the light emission unit F is activated.
₁ operates to make the light emitting element emit light, and in the light receiving portion F ₂ , the infrared light emitted from the light emitting element is received by the light receiving element, and while the infrared light is being received, the infrared light from the light emitting element is received. The control device 40 is notified that the light is being received. Then, when the infrared light is no longer received from the light emitting section F ₁ , the control device 40 is notified as abnormal conveyance.

The continuous unloader A is shown in FIG.
As shown in FIG. 5, the same as in the first embodiment except that the detection signal from the abnormal conveyance detection sensor 57 is input instead of the foreign matter detection sensor 56, and the first embodiment is the same. Similarly, each rotation drive mechanism and the hydraulic cylinder are driven based on the detection signals from the various sensors, and when the abnormal conveyance is notified by the detection signal from the abnormal conveyance detection sensor 57, the lateral feed of the excavation unit 24 and The excavation by the excavation unit 24 is stopped.

The operation of the second embodiment will be described next. Similar to the first embodiment, the reference transverse feed speed of the excavation unit 24 and the reference rotation speed of the sprocket 23 are set, and the excavation unit 24 is transversely fed based on the reference transverse feed speed and the reference rotation speed. , The sprocket 23 is rotated, and each part is appropriately controlled so as to achieve a constant amount of excavation.

At this time, in the abnormal conveyance detection sensor 57,
An abnormality is being detected for the passing bucket 26,
If no foreign matter such as scraps or long objects is mixed in the bucket 26, the scattered cargo is contained within the maximum specified range of the bucket 26, and therefore the abnormal transportation detection sensor 57 does not detect it as abnormal transportation. Absent.

On the other hand, when a foreign matter is mixed in the bucket 26, when the foreign matter is conveyed by the bucket 26 and passes in front of the abnormal conveyance detection sensor 57, a long object or the like has a maximum specified range. Since the extraordinary transport detection sensor 57 blocks the infrared light due to a foreign substance or the like, the abnormal transport detection sensor 57 detects the abnormal transport and detects it.
To notify. In response to this, the control device 40 stops the drive of each rotation drive unit. Therefore, the foreign matter is formed by the conveyor with the crosspiece of the swing boom 15 on the belt conveyor 15.
belt conveyor 15a because it is not conveyed to a
The corrugated bars or the horizontal bars are not damaged by foreign matter.

Further, among the scattered cargoes conveyed by the continuous unloader A, there are those that have low adhesiveness and are less likely to form lumps, and those that have high adhesiveness and tend to form lumps due to moisture and material characteristics. . There is no problem in the case of the one that is less likely to be a lump, but in the case of a scattered cargo that is likely to be a lump such as fine coke or fine ore, when these are lumps, a bucket is used at the time of scraping by the excavation unit 24. 26 is deformed,
Or, when carrying lump ore, the bucket 2
6 may be deformed. Further, the bucket 26 may be deformed by hitting the bucket elevator 20 into the hold when it is transported into the hold or when moving to a predetermined position in the hold.

In this case, when the scattered cargo to be conveyed has a low adhesiveness and does not easily form a lump, the excavation unit 2
Since the scraping at 4 is performed relatively easily, the bucket 26 is not deformed, and the abnormal conveyance detection sensor 57 does not detect the abnormal conveyance.

However, when the scattered cargo to be conveyed is highly sticky and easily aggregates, the bucket 26 is deformed to scrape the aggregated scattered cargo 35 at the excavation section 24. . And this deformed bucket 2
6 moves around the bucket 25, goes up in the bucket elevator 20 as the chain 25 moves around, and passes through the point where the abnormal conveyance detection sensor 57 is arranged.
When the shape of the bucket 26 exceeds the maximum specified range defined by the abnormal conveyance detection sensor 57, such as when the bucket 26 is deformed by protruding more than the shape of 6, the light receiving unit F ₂ of any infrared sensor emits infrared light. Since the light cannot be received, the control device 40 is notified that the conveyance is abnormal. In response to this, the control device 40 stops the drive of each rotary drive mechanism and the hydraulic cylinder.

Therefore, when foreign matter such as scrap is not mixed in the scattered cargo, the conveyor with a crosspiece or the like is not damaged, but when the deformed bucket 26 is moved in the bucket elevator 20 in a circular manner, As shown in FIG. 2 or FIG. 3, a side plate 41 is provided at the uppermost portion of the bucket elevator 20, and the side plate 41 is provided to prevent spillage of the load from the bucket 26. The distance between the plate 41 and the rotating bucket 26 is short. Therefore, when the deformed bucket 26 as described above is moved around, and when it is deformed into a shape projecting more than the actual bucket 26, the projecting portion due to the deformation causes the side plate 41 or other bucket elevator 20 The equipment may collide with each other and damage the equipment. However, the abnormal conveyance detection sensor 57 causes the bucket 26 to protrude from the actual bucket 26 before the bucket 26 passes through the side plate 41. Since the abnormal deformation detection sensor 57 detects that the deformation has occurred, the equipment inside the bucket elevator 20 is not damaged.

Therefore, in the first and second embodiments described above, foreign matter such as scraps or long objects can be detected in the bucket elevator 20, so that the bucket elevator 20 with the crosspieces subsequent thereto can be detected. It is possible to avoid damaging the equipment such as the conveyor, improve the reliability of the continuous unloader, and improve the processing efficiency.

Further, when the continuous unloader is damaged, it is necessary to repair the damage, which requires repair time. However, by avoiding the damage, the transportation can be completed in the shortest time. It is possible to reduce the demurrage charge required for the ship and to reduce costs.

Further, in the second embodiment,
The foreign matter such as scrap is detected, and the bucket 26
Since the deformation of the bucket 26 is also detected, it is possible to prevent the deformation of the bucket 26 from damaging the equipment such as the side plate 41 in the bucket elevator 20.
The processing efficiency of the continuous unloader can be improved.

In each of the above embodiments, the case where the control device 40 is composed of a plurality of control circuits has been described, but the present invention is not limited to this, and arithmetic processing is performed by a processor such as a microcomputer. May be.

Further, in each of the above-described embodiments, when the foreign matter detection sensor 56 detects a foreign matter or when the abnormal conveyance detection sensor 57 detects an abnormal conveyance, the control device 4 is operated.
In No. 0, the case where each rotary drive mechanism is stopped has been described, but the present invention is not limited to this, and for example, the sprocket 2
3 rotation only, or sprocket 23
It is also possible to reverse the rotation, and it can be arbitrarily set according to the coping method of each continuous unloader at the time of detecting a foreign substance or at the time of detecting abnormal conveyance.

Further, in the first embodiment described above,
Although the case where the foreign matter detection sensor 56 is configured by the acoustic sensor has been described, the present invention is not limited to this. For example, when a vibration pickup is provided instead of a microphone to detect vibration, and the vibration is larger than a preset reference vibration, It is also possible to detect foreign matter as a foreign matter based on vibrations.

Further, in the second embodiment,
Although the case where the abnormal conveyance detection sensor 57 is configured by an infrared sensor has been described, the invention is not limited to this, and other optical sensors can be applied, and the tension of the wire can be increased by contacting the wire with an object. By applying a wire sensor that activates the switch, or
A monitoring camera or the like may be provided to monitor the shape of the bucket, and the point is that any sensor that can detect that the bucket is out of a predetermined reference range can be applied.

[0052]

As described above, according to the continuous unloader according to the present invention, foreign matters such as scraps and long objects mixed in the cargo of the cargo hold can be detected when these foreign matters are in the bucket elevator. Since it is detected by the above, in the transfer process after the bucket elevator, due to foreign matter,
The equipment of the continuous unloader can be prevented from being damaged, and the reliability of the continuous unloader can be improved and the transfer efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an example of a continuous unloader according to the present invention.

2 is a detailed view of the upper portion of the bucket elevator of the continuous unloader of FIG.

FIG. 3 is an explanatory view showing an installed state of a side plate.

FIG. 4 is a block diagram showing a control system of the continuous unloader according to the first embodiment.

FIG. 5 is an explanatory diagram for explaining the operation in the first embodiment.

FIG. 6 is a schematic configuration diagram showing an example of a continuous unloader according to a second embodiment.

FIG. 7 is an explanatory diagram illustrating details of an abnormal conveyance detection sensor according to the second embodiment.

FIG. 8 is a block diagram showing a control system of a continuous unloader according to a second embodiment.

[Explanation of symbols]

 A Continuous unloader S Ship 5 Ground side conveyor 11 Swing tower 11a Vertical conveyor 12 Hopper 15 Swing boom 15a Belt conveyor 20 Bucket elevator 23 Sprocket 24 Excavator 25 Chain 26 Bucket 40 Control device 41 Side plate 56 Foreign matter detection sensor 57 Abnormal conveyance detection Sensor

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masamichi Ogami, 1 Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture (without street number) Inside the Mizushima Works, Kawasaki Steel Co., Ltd. (72) Kazuo Hosomi, Mizushima Kawasaki Dori, Kurashiki City, Okayama Prefecture Chome (No house number) Kawasaki Steel Co., Ltd. Mizushima Steel Works

Claims (1)

[Claims] 1. A chain to which a plurality of buckets are attached moves circularly along the inside of a bucket elevator, and while horizontally traversing this bucket elevator, a scraping section provided at the bottom of each chain moves each bucket into each bucket. In a continuous unloader that scrapes the cargo in the hold and transports it to a predetermined location, an abnormality that damages the equipment of the continuous unloader accompanying the transportation of the cargo is detected in the bucket elevator. A continuous unloader, characterized in that it is provided with a conveyance detecting means.