JP2023061122A - belt conveyor - Google Patents

Abstract

To provide a belt conveyor capable of preventing falling during movement and transfer and according to an operation condition.SOLUTION: A belt conveyor 1 includes: a belt conveyor body 10 for transporting an object to be transported; and a movable base part 20 for holding the belt conveyor body 10. It also includes: inclination sensors 24, 24 for detecting inclination of the base part 20; displacement sensors 32, 33 for detecting displacement of the belt conveyor body 10; and control means 23 for calculating the gravity center position of the belt conveyor body 10 based on a measurement signal transmitted from the displacement sensors 32, 33.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor capable of preventing overturning during movement/transportation and depending on operating conditions.

Crushed stones after crushing concrete waste materials, asphalt waste materials, and the like by a crushing device such as an impact crusher are carried out by a conveying device such as a belt conveyor.

For example, Patent Literature 1 discloses a self-propelled conveying apparatus that includes a folding conveying section and a traveling body that supports the conveying section. This self-propelled conveying device conveys an object to be conveyed, which is fed from one end of the belt conveyor through a hopper, and discharges it from the other end of the belt conveyor, thereby stacking the object on the ground. form deposits;

JP 2016-216218 A

However, in the conventional self-propelled conveying device as disclosed in Patent Document 1, the inclination of the traveling body itself from the horizontal state may occur due to the weight of the conveyed object and the conveying situation such as uneven distribution of the conveyed object on the conveyor belt. , the position of the center of gravity of the conveying section (belt conveyor body) may be greatly displaced in the front-rear, left-right, and upward directions.
Further, the position of the center of gravity may be displaced when the belt conveyor main body is shifted from a non-use state to a use state, or when a transfer device is moved or transported.

An inclination of the running body or a large deviation of the center of gravity of the belt conveyor body may overturn the belt conveyor body or the transport device itself, which may lead to a serious accident. is not taken. Furthermore, in a state of use in which an object to be conveyed is being conveyed, the object to be conveyed will be scattered around when the conveying device falls over, which may cause a wider range of accidents.

SUMMARY OF THE INVENTION An object of the present invention is to provide a belt conveyor capable of preventing overturning during movement/transportation and depending on operating conditions.

A belt conveyor according to the present invention includes a belt conveyor main body that conveys an object to be conveyed, and a movable base that holds the belt conveyor main body. It comprises a displacement sensor for detecting the displacement of the main body, and control means for calculating the position of the center of gravity of the belt conveyor main body based on the measurement signal transmitted from the displacement sensor.

As described above, the present invention includes the tilt sensor, the displacement sensor, and the control means for calculating the center-of-gravity position of the belt conveyor body. It is possible to determine the danger of overturning of the conveyor, and it is possible to prevent overturning of the belt conveyor in advance.

In the belt conveyor according to the present invention, if necessary, the displacement sensor is a distance sensor attached to an extendable support arm pivotally supported by the base and supporting the belt conveyor body.

As described above, in the present invention, since the distance sensor is attached to the extendable support arm that supports the belt conveyor body, the distance between the fixed arm and the extendable arm is measured, and depending on the amount of change in this distance, Since the state of the support arm can be monitored at all times, it is possible to more easily prevent the belt conveyor from overturning.

The belt conveyor according to the present invention optionally includes a weight sensor for measuring the weight of the conveyed object on the belt conveyor body, and the control means controls the weight of the conveyed object based on the measurement signal transmitted from the weight sensor. The conveying situation is estimated, and the position of the center of gravity of the belt conveyor body is calculated by combining the estimated conveying situation.

As described above, in the present invention, the control of estimating the conveying condition of the object to be conveyed based on the measurement signals transmitted from the weight sensor and the speed sensor, and calculating the center-of-gravity position of the belt conveyor main body by combining the estimated conveying condition. Since the means is provided, the weight of the object to be conveyed on the predetermined area is referenced to predict the conveying situation of the entire belt conveyor body, and the position of the center of gravity of the belt conveyor body is calculated. It has the effect of being able to prevent the conveyor from overturning in advance.

A belt conveyor according to the present invention comprises, if necessary, a speed sensor for measuring the conveying speed of an object to be conveyed, and a carry-in amount sensor for measuring the weight of the object to be conveyed supplied to the belt conveyor body, and a control means predicts the conveying condition of the object to be conveyed based on the measurement signals transmitted from the speed sensor and the carry-in amount sensor, and calculates the center-of-gravity position of the belt conveyor body based on the predicted conveying condition.

As described above, in the present invention, the conveying condition of the object to be conveyed is predicted based on the measurement signals transmitted from the speed sensor and the carry-in amount sensor, and the center-of-gravity position of the belt conveyor body is calculated based on the predicted conveying condition. Since the control means is provided, the danger of overturning of the belt conveyor can be detected in advance, and the operator can be notified of the danger of overturning with sufficient time.

In the belt conveyor according to the present invention, the base portion is self-propelled if necessary.

As described above, in the present invention, by adopting the self-propelled base portion, the belt conveyor can be moved without dismantling the belt conveyor or requiring a transport vehicle for the belt conveyor. It has the effect of being able to improve efficiency.

It is a perspective view in the operating state of the belt conveyor according to the first embodiment of the present invention. 1 is a perspective view of a belt conveyor in a folded state according to a first embodiment of the present invention; FIG. 4 is a perspective view of a main part of a head-side support arm in the belt conveyor according to the first embodiment of the present invention; 4 is a perspective view of a main part of a tail-side support arm in the belt conveyor according to the first embodiment of the present invention; FIG. 3 is a perspective view of a main part of a head-side link mechanism in the belt conveyor according to the first embodiment of the present invention; 1 is a device block diagram of a belt conveyor according to a first embodiment of the present invention; FIG. FIG. 4 is a flow chart showing an overturn prevention processing operation in the operating state of the belt conveyor according to the first embodiment of the present invention; FIG. FIG. 8 is a perspective view of a main part of an intermediate module in a belt conveyor according to a second embodiment of the invention; It is a device block diagram of a belt conveyor according to a second embodiment of the present invention. It is a flowchart which shows the fall prevention processing operation in the belt conveyor which concerns on the 2nd Embodiment of this invention. FIG. 11 is a perspective view of a main part of a tail module in a belt conveyor according to a third embodiment of the invention; It is a device block diagram of a belt conveyor according to a third embodiment of the present invention. It is a flowchart which shows the fall prevention processing operation in the belt conveyor which concerns on the 3rd Embodiment of this invention.

Embodiments of the present invention will be described below. Also, the same reference numerals are given to the same elements throughout the present embodiment.

[First Embodiment]
A belt conveyor according to a first embodiment will be described below with reference to FIGS. 1 to 5. FIG.

A belt conveyor according to this embodiment includes a belt conveyor body that conveys an object to be conveyed, and a base portion that holds the belt conveyor body, and the base portion includes a tilt sensor that measures the tilt of the base portion. In addition, the belt conveyor body is provided with a displacement sensor for measuring the displacement of the belt conveyor body.

A detailed description will be given below with specific examples.

The belt conveyor 1 includes a belt conveyor body 10 that conveys objects to be conveyed, and a running body 20 as a base portion that holds the belt conveyor body 10 .

By adopting the self-propelled running body 20 in this manner, the belt conveyor 1 can be moved without dismantling the belt conveyor 1 or requiring a transport vehicle for the belt conveyor 1, resulting in work efficiency. can be improved.

The belt conveyor main body 10 includes a long frame 11, a drive roller 12 provided on the head side of the frame 11 (on the carrying-out side of the object to be conveyed), and a driven roller 12 on the tail side (on the carrying-in side of the object to be conveyed) of the frame 11. A roller 13, a plurality of guide rollers 14 provided between the drive roller 12 and the driven roller 13, a drive motor 15 that rotationally drives the drive roller 12, and a bridge between the drive roller 12 and the driven roller 13. , and an endless conveyor belt 16.

In this embodiment, the objects to be conveyed include various objects that can be conveyed by the belt conveyor 1, such as wood chips, crushed pieces such as concrete waste and asphalt waste, minerals such as coal and iron ore, earth and sand for reclamation, ready-mixed concrete, and the like. include.

The frame 11 is divided into a head module 11A forming one end of the frame 11, an intermediate module 11B connected to the head module 11A, and a tail module 11C connected to the intermediate module 11B and forming the other end of the frame 11. configured.
The frame 11 is pivotally supported at the head-side and tail-side lower portions of the intermediate module 11B via a head-side support arm 30 and a tail-side support arm 31 provided on the front and rear sides of the traveling body 20 .

The running body 20 includes a vehicle 21 that holds the belt conveyor body 10 and crawler running belts 22 that are attached to both sides of the lower portion of the vehicle 21 and run on the ground.
The vehicle 21 is provided with a control panel 23, tilt sensors 24, 24, a hydraulic pressure source (not shown), a communication section, and the like.
The control panel (control unit) 23 includes a CPU, a ROM for storing and storing control programs, a storage means such as a RAM as an operation area for the control programs, an interface unit for interfacing with peripheral circuits, and the like. be done. The control panel 23 controls the driving of the crawler running band 22, the belt conveyor main body 10, and the like.
The tilt sensors 24, 24 measure the front-rear and left-right tilts of the traveling body 20, respectively.
The hydraulic source drives (extends and contracts) a hydraulic cylinder, which will be described later.
The communication unit receives a signal transmitted from the remote control device via a radio line, and transmits management information supplied from the control panel to the management terminal via the radio line.

As shown in FIG. 1, the frame 11 has an extended state (operating state) in which the head module 11A, the intermediate module 11B, and the tail module 11C extend linearly, and as shown in FIG. 11C is configured to take two modes, one being a folded state in which the intermediate module 11B is folded upward.

The head-side support arm 30 and the tail-side support arm 31 are extendable and retractable according to the extended state and folded state of the frame 11 .

The head-side support arm 30 includes a fixed arm 30A pivotally supported at the front lower portion of the traveling body 20, and is slidably housed in the fixed arm 30A and pivotally supported at the head-side lower portion of the intermediate module 11B of the frame 11. and a telescopic arm 30B. The telescopic arm 30B is provided with an ultrasonic distance sensor 32 as a displacement sensor.
The distance sensor 32 measures the distance d1 between the fixed arm 30A and the frame member arranged to face the distance sensor 32 .

The tail-side support arm 31 includes a fixed arm 31A pivotally supported on the tail-side lower portion of the intermediate module 11B of the frame 11, and is slidably accommodated in the fixed arm 31A and pivotally supported on the rear lower portion of the traveling body 20. and a telescopic arm 31B. The fixed arm 31A is provided with an ultrasonic distance sensor 33 as a displacement sensor.
The distance sensor 33 measures the distance d2 between the telescopic arm 31B and the frame member arranged to face the distance sensor 33 .

As described above, since the distance sensors 32 and 33 are attached to the extendable support arms 30 and 31 that support the belt conveyor body 10, the distance between the fixed arms 30A and 31A and the extendable arms 30B and 31B can be measured. Then, the state of the support arms 30 and 31 can be constantly monitored in accordance with the amount of change in the distance, and the overturning of the belt conveyor 1 can be prevented in advance more easily.

Next, a method of shifting the belt conveyor body 10 from the folded state to the extended state and a method of shifting from the stretched state to the folded state will be described.

First, in order to extend the belt conveyor body 10 from the folded state, the hydraulic cylinders 40 and 41 attached to both side surfaces of the head-side support arm 30 and the tail-side support arm 31 are extended to extend the head-side support arm 30 . And the tail-side support arm 31 is extended and erected, and the intermediate module 11B with the head module 11A and the tail module 11C stacked above is lifted above the traveling body 20 . In the example shown in FIG. 1, the extension states of the hydraulic cylinders 40 and 41 are controlled so that the head side of the intermediate module 11B is higher than the tail side, and the intermediate module 11B is inclined downward from the head side to the tail side. I'm trying to be.
It should be noted that the belt conveyor body 10 can freely change its vertical position and inclination angle even after the transition (while the belt conveyor 1 is in operation).

Next, by contracting the hydraulic cylinders 42 attached to both side surfaces on the head side of the intermediate module 11B, the head module 11A and the intermediate module 11B are connected via the link mechanism 44 provided at the connecting portion of the head module 11A and the intermediate module 11B. The head module 11A is rotated from the connecting portion with the intermediate module 11B as a starting point, and placed on the head-side extension line of the intermediate module 11B after standing upright with respect to the intermediate module 11B.
At the same time, by contracting the hydraulic cylinders 43 attached to both side surfaces of the intermediate module 11B on the tail side, the intermediate module 11B and the tail module 11C are connected to each other via the link mechanism 45 provided at the connecting portion. The tail module 11C is rotated starting from the connecting portion between the tail module 11B and the tail module 11C, and after standing upright with respect to the intermediate module 11B, is arranged on the extension line of the tail side of the intermediate module 11B, whereby the head module 11A, intermediate module 11B, and tail module 11C are linearly extended, that is, in an operating state.

Conversely, in order to change the belt conveyor body 10 from the extended state to the folded state, the hydraulic cylinders 42 and 43 are extended to connect the head module 11A, the tail module 11C and the intermediate module 11B via the link mechanisms 44 and 45. The head module 11A and the tail module 11C are rotated starting from the connecting portion, and after standing upright with respect to the intermediate module 11B, the head module 11A and the tail module 11C are stacked above the intermediate module 11B.

Next, the hydraulic cylinders 40 and 41 are contracted to tilt the head-side support arm 30 and the tail-side support arm 31 to the running surface side while contracting, and the intermediate module 11B is directed toward the upper surface of the running body 20 so as to be substantially horizontal. It is lowered to bring the belt conveyor body 10 into a folded state.

By folding the belt conveyor main body 10 in this way, the belt conveyor 1 can be made compact, and the belt conveyor 1 can be moved and transported by a trailer or the like.

Next, the overturn prevention processing operation of the belt conveyor 1 according to the present embodiment will be described with reference to FIGS. 6 and 7. FIG. FIG. 6 is a device block diagram of the belt conveyor according to this embodiment, and FIG. 7 is a flow chart showing an overturn prevention processing operation in the operating state of the belt conveyor according to this embodiment.
Anti-tipping operations are performed not only in the folded state, the active state, but also during transitions between these states.

First, the tilt sensors 24, 24 detect the tilt of the traveling body 20 and transmit the measurement result (signal) to the controller 23 (step S100).

The controller 23 calculates the degree of inclination of the traveling body 20 based on the measurement signals sent from the inclination sensors 24 (step S110).

Further, the distance sensor 32 attached to the head-side support arm 30 detects the distance between the fixed arm 30A and the telescopic arm 30B of the head-side support arm 30, and transmits the measurement result (signal) to the control unit 23 ( step S120).

Similarly, the distance sensor 33 attached to the tail-side support arm 31 detects the distance between the fixed arm 31A and telescopic arm 31B of the tail-side support arm 31 and transmits the measurement result (signal) to the control unit 23. (Step S120).

The control unit 23 determines the amount of change in the distance between the fixed arm 30A and the telescopic arm 30B and the amount of change in the distance between the fixed arm 31A and the telescopic arm 31B from the measurement signals sent from the distance sensors 32 and 33, that is, the head side The expansion ratios of the support arm 30 and the tail side support arm 31 are calculated (step S130), and the center of gravity position of the belt conveyor main body 10 is determined from the expansion ratio and the length and weight of each member constituting the belt conveyor main body 10 input in advance. is calculated (step S140).

For example, during the transition from the folded state to the operating state, the bed module 11A and the tail module 11C are in an upright state, so the center of gravity of the belt conveyor body 10 is raised. In the operating state, the center of gravity position is lower than that during transition from the folded state to the operating state, but the center of gravity position is located forward of the traveling body 20 (the tail module 11C is longer than the head module 11A). , the center of gravity exists behind the running body 20). In the folded state, the position of the center of gravity is lower than that during transition from the folded state to the operating state, and the position of the center of gravity is almost at the position of the traveling body 20, which is the most stable state.

The control unit 23 determines the overturn risk of the belt conveyor 1 from the degree of inclination of the traveling body 20 and the calculated center-of-gravity position of the belt conveyor body 10 (step S150).
Specifically, when the degree of inclination of the running body 20 exceeds a preset threshold and the center-of-gravity position of the belt conveyor body 10 is outside a predetermined area (the center-of-gravity position is from the running body 20 If there is a large deviation), it is determined that there is a high risk of overturning of the belt conveyor 1 (step S150: YES). Send a high risk message to the management terminal.

When the belt conveyor 1 is in operation, the drive motor 15 is stopped to stop the conveying of the conveyed object by the conveyor belt 16 (step S160), and the overturn prevention processing operation is completed.

Note that the control unit 23 stops the traveling body 20 when the belt conveyor 1 is moving, and stops the transition operation when the belt conveyor body 10 is transitioning to another state.

The control unit 23 determines that the risk of overturning is low or non-existent when the degree of inclination of the traveling body 20 does not exceed a preset threshold value and the position of the center of gravity of the belt conveyor body 10 is within a predetermined area. (step S150: NO), and then repeat steps S100 to S150 to monitor the belt conveyor 1.

In step S150, the control unit 23 controls the overturning of the belt conveyor 1 when the inclination of the traveling body 20 exceeds a preset threshold value or when the center of gravity of the belt conveyor body 10 is outside a predetermined area. It may be determined that the danger is high, and the drive motor 15 may be stopped.
In addition, in step S160, the control unit 23 may only notify the operator and surrounding workers so that the operator stops the drive motor 15, or the operator and surrounding workers may be notified. The drive motor 15 may be stopped without notifying the staff.

Since the inclination sensors 24, 24, the displacement sensors (distance sensors) 32, 33, and the control unit 23 for calculating the center-of-gravity position of the belt conveyor body are provided, the inclination of the base (running body) 20 can be detected. The risk of overturning of the belt conveyor can be determined according to the degree and the position of the center of gravity of the belt conveyor body 10, and overturning of the belt conveyor can be prevented in advance.

[Second embodiment]
A belt conveyor according to the second embodiment will be described with reference to FIG. FIG. 8 is a perspective view of a main part of an intermediate module in the belt conveyor according to this embodiment.
In this embodiment, explanations that overlap with those of the first embodiment will be omitted.

The belt conveyor 1 according to this embodiment is provided with a weight sensor 34 that measures the weight of the object to be conveyed on a predetermined area of the intermediate module 11B at the intermediate module 11B.

Next, the overturn prevention processing operation of the belt conveyor 1 according to this embodiment will be described with reference to FIGS. 9 and 10. FIG. FIG. 9 is a device block diagram of the belt conveyor according to this embodiment, and FIG. 10 is a flow chart showing an overturn prevention processing operation in the belt conveyor according to this embodiment.

First, as in the first embodiment, the tilt sensors 24, 24 detect the tilt of the traveling body 20 and transmit the measurement result (signal) to the controller 23 (step S200).
The controller 23 calculates the degree of inclination of the traveling body 20 based on the measurement signals sent from the inclination sensors 24 (step S210).

Next, the distance sensor 32 attached to the head-side support arm 30 detects the distance between the fixed arm 30A and the telescopic arm 30B of the head-side support arm 30, and transmits the measurement result (signal) to the control unit 23. Similarly, the distance sensor 33 attached to the tail-side support arm 31 detects the distance between the fixed arm 31A and the telescopic arm 31B of the tail-side support arm 31, and transmits the measurement result (signal) to the control unit 23. (step S220).

The control unit 23 determines the amount of change in the distance between the fixed arm 30A and the telescopic arm 30B and the amount of change in the distance between the fixed arm 31A and the telescopic arm 31B from the measurement signals sent from the distance sensors 32 and 33, that is, the head side The expansion ratios of the support arm 30 and the tail-side support arm 31 are calculated (step S230).

On the other hand, the weight sensor 34 detects the weight of the transported object on a predetermined area, and transmits the measurement result (signal) to the controller 23 (step S240).

Based on the measurement signal transmitted from the weight sensor 34, the control unit 23 estimates the conveying status of the article to be conveyed on the conveyor belt 16 (step S250).
Specifically, control unit 23 calculates the weight of the transported object on the predetermined area from the measurement signal transmitted from weight sensor 34 . Next, assuming that an object to be conveyed having a weight equivalent to that of the object to be conveyed in a predetermined area is conveyed over the entire belt conveyor main body 10, the conveying direction length in the predetermined area and the length of the belt conveyor main body 10 The weight of the object to be conveyed on the entire belt conveyor main body 10 is calculated from the ratio of .

The control unit 23 controls the estimated weight of the object to be conveyed on the belt conveyor body 10 calculated as described above, the expansion ratios of the head-side support arm 30 and the tail-side support arm 31, and the previously input belt conveyor body 10 is calculated from the length and weight of each member constituting the belt conveyor main body 10 (step S260).

The control unit 23 determines the risk of overturning of the belt conveyor body 10 from the degree of inclination of the traveling body 20 and the calculated center-of-gravity position of the belt conveyor body 10 (step S270).
Specifically, when the degree of inclination of the running body 20 exceeds a preset threshold and the center-of-gravity position of the belt conveyor body 10 is outside a predetermined area (the center-of-gravity position is from the running body 20 If there is a large deviation), it is determined that there is a high risk of overturning (step S270: YES), and this is notified to the operator and surrounding workers by a warning sound, etc., and the risk of overturning is high. to the management terminal.

When the belt conveyor 1 is in operation, the driving motor 15 is stopped to stop the conveying of the conveyed object by the conveyor belt 16 (step S280), and the tipping prevention processing operation is finished.

Note that the control unit 23 stops the traveling body 20 when the belt conveyor 1 is moving, and stops the transition operation when the belt conveyor body 10 is transitioning to another state.

The control unit 23 determines that the risk of overturning is low or non-existent when the degree of inclination of the traveling body 20 does not exceed a preset threshold value and the position of the center of gravity of the belt conveyor body 10 is within a predetermined area. Then (step S270: NO), steps S200 to S270 are repeatedly executed, and the belt conveyor 1 is continuously monitored.

In this way, the control unit 23 is provided for estimating the transport condition of the object to be transported based on the measurement signal transmitted from the weight sensor 34 and calculating the center-of-gravity position of the belt conveyor body 10 based on the estimated transport condition. Therefore, by referring to the weight of the object to be conveyed on a predetermined area, the conveying situation of the entire belt conveyor body 10 is predicted, and the position of the center of gravity of the belt conveyor body 10 is calculated. can be prevented in advance.

Note that the weight sensor 34 need not be provided only in the intermediate module 11B. For example, the weight sensor 34 may be provided in each module constituting the belt conveyor main body 10. In this case, the control unit 23 estimates the transport status of the transported object for each module and calculates the center-of-gravity position of the belt conveyor main body 10 .
Thereby, the control part 23 can calculate the center-of-gravity position of the belt conveyor main body 10 more accurately.

Further, in step S270, the control unit 23 controls the overturning of the belt conveyor 1 when the inclination of the traveling body 20 exceeds a preset threshold value or when the center of gravity of the belt conveyor body 10 is outside a predetermined area. It may be determined that the danger is high, and the drive motor 15 may be stopped.
Furthermore, in step S280, the control unit 23 may only notify the operator and surrounding workers and stop the driving motor 15 by the operator, etc., or may stop the operator and surrounding workers. The drive motor 15 may be stopped without notifying the staff.

[Third Embodiment]
A belt conveyor according to the third embodiment will be described with reference to FIG. 11 . FIG. 11 is a perspective view of the main part of the tail module in the belt conveyor according to this embodiment.
In this embodiment, explanations that overlap with those of the first embodiment will be omitted.

The belt conveyor 1 according to the present embodiment includes a speed sensor 35 provided in the tail module 11C for measuring the conveying speed of the conveyor belt 16 that conveys the conveyed object, and a conveying amount of the conveyed object to be supplied. It is also possible to construct a system that includes the carry-in amount sensor 36 .

12 and 13, the overturn warning processing operation of the belt conveyor 1 according to the present embodiment will be described below. FIG. 12 is a device block diagram of the belt conveyor according to this embodiment, and FIG. 13 is a flow chart showing an overturn prevention processing operation in the belt conveyor according to this embodiment.

First, the speed sensor 35 detects the conveying speed of the conveyor belt 16 that conveys the object to be conveyed, and transmits the measurement result (signal) to the control unit 23 (step S300).

Also, the carry-in amount sensor 36 detects the weight of the object to be conveyed that is supplied onto the conveyor belt 16 of the belt conveyor body 10, and transmits the measurement result (signal) to the control unit 23 (step S310).

Based on the measurement signals sent from the speed sensor 35 and the carry-in amount sensor 36, the control unit 23 predicts the conveying state of the article to be conveyed on the conveyor belt 16 when the belt conveyor 1 is continuously operated (step S320). ).
Specifically, the control unit 23 assumes that the weight of the object to be conveyed successively carried onto the conveyor belt 16 is the same as the weight of the object to be conveyed detected by the carry-in amount sensor 36, and 16 to predict the transport status of the transported object. The weight of the objects to be conveyed successively carried onto the conveyor belt 16 is updated as needed based on the measurement signal transmitted from the carry-in amount sensor 36 .
For example, when the carry-in amount sensor 36 detects A (kg) as the weight of the object to be conveyed, it is predicted that the object to be conveyed will be conveyed on the entire conveyor belt 16 under the condition of "AAAAAA". After an arbitrary time elapses, when B (kg) is detected as the new weight of the transported object by the carry-in amount sensor 36, "AAAAB"→"AAABB"→"AABBB"→"ABBBB"→"BBBBB" It is predicted that the object to be transported will be transported in a transport situation of . Further, after an arbitrary period of time has elapsed, for example, when the carry-in amount sensor 36 detects C (kg) as the weight of the transported object at the stage of "AABBB", "ABBBC"→"BBBCC"→"BBCCC" →“BCCCC”→“CCCCC” predicts that the object will be transported.

The control unit 23 calculates the center-of-gravity position of the belt conveyor main body 10 based on the predicted transport status of the object to be transported (step S330).
Specifically, the control unit 23 predicts and calculates the center-of-gravity position of the belt conveyor main body 10 from the predicted conveying situation and the length and weight of each member constituting the belt conveyor main body 10 input in advance.

The control unit 23 determines the risk of overturning of the belt conveyor 1 from the transport status of the transported object predicted in the future (step S340).

For example, in the middle of the supply to the belt conveyor main body 10, if the supply amount of the material to be conveyed is uneven or clogged, the amount of the material to be conveyed on the head module 11A is large and the amount of the material to be conveyed on the tail module 11C is small. expected to become In this case, the center of gravity of the belt conveyor body 10 becomes higher, and there is a higher possibility that the belt conveyor body 10 will deviate farther forward than the traveling body 20 .
The control unit 23 constantly monitors the carry-in amount of the transported object by the carry-in amount sensor 36, and if it is determined that the center of gravity position will eventually be outside the predetermined area if the operating state is continued as it is (step S340: YES), , this is notified to the operator and surrounding workers by means of a warning sound, etc., and is transmitted to the management terminal (step S350). On the other hand, if it is determined that the center-of-gravity position is within the predetermined area even if the operating state is continued (step S340: NO), steps S300 to S340 are repeatedly executed to monitor the belt conveyor 1. continue.

When the operator receives a warning from the control unit 23 at the management terminal, the operator can manually stop the drive motor 15 according to the situation after visually confirming the conveying situation of the belt conveyor 1 .
Further, if the operator does not stop the drive motor 15 after the notification, the control unit 23 may stop the drive motor 15 after a predetermined time has elapsed according to the conveying speed of the conveyor belt 16 . At this time, the supply of the object to be conveyed onto the conveyor belt 16 may also be stopped.

Here, the overturn prevention processing operation in the first and second embodiments may be performed in parallel with the overturn warning processing operation in the present embodiment.

In this way, the control for predicting the conveying condition of the object to be conveyed based on the measurement signals transmitted from the speed sensor 35 and the carry-in amount sensor 36 and calculating the center-of-gravity position of the belt conveyor main body 10 based on the predicted conveying condition. Since the unit 23 is provided, the danger of overturning of the belt conveyor 1 can be detected in advance, and the danger of overturning can be notified to the operator with sufficient time.

In addition, in each of the above embodiments, the belt conveyor main body 10 has been described as being of a foldable type, but it may be of a telescopic type. In the telescopic type, the bed module 11A and the tail module 11C are staggered and stored above and below the intermediate module 11B.

In addition, although the case where the displacement sensor is a distance sensor has been described, it is not limited to this. can be used.

In addition, although the self-propelled traveling body 20 is used as the base, it may be a towed one that does not have a drive source.

Furthermore, each of the above embodiments can be implemented in combination as appropriate.

1 Belt Conveyor 10 Belt Conveyor Body 11 Frame 11A Head Module 11B Intermediate Module 11C Tail Module 12 Drive Roller 13 Driven Roller 14 Guide Roller 15 Drive Motor 16 Conveyor Belt 20 Running Body 21 Vehicle 22 Crawler Running Band 23 Control Panel (Control Unit)
24 tilt sensor 30 head side support arm 30A fixed arm 30B telescopic arm 31 tail side support arm 31A fixed arm 31B telescopic arms 32, 33 distance sensor 34 weight sensor 35 speed sensor 36 carry-in amount sensors 40-43 hydraulic cylinders 44, 45 link mechanism

Claims (5)

A belt conveyor comprising a belt conveyor body for conveying an object to be conveyed and a movable base for holding the belt conveyor body,
a tilt sensor that detects the tilt of the base;
a displacement sensor that detects displacement of the belt conveyor body;
and control means for calculating a center-of-gravity position of the belt conveyor body based on a measurement signal transmitted from the displacement sensor. In the belt conveyor according to claim 1,
A belt conveyor according to claim 1, wherein said displacement sensor is a distance sensor attached to an extendable support arm pivotally supported by said base and supporting said belt conveyor body. In the belt conveyor according to claim 1 or 2,
A weight sensor for detecting the weight of the conveyed object on the belt conveyor body,
The control means is characterized by estimating the conveying condition of the object to be conveyed based on the measurement signal transmitted from the weight sensor, and calculating the center-of-gravity position of the belt conveyor body by combining the estimated conveying condition. belt conveyor. In the belt conveyor according to any one of claims 1 to 3,
a speed sensor that detects the transport speed of the object to be transported;
A carry-in amount sensor that detects the weight of the object to be conveyed that is supplied to the belt conveyor body,
The control means predicts the conveying condition of the object to be conveyed based on measurement signals transmitted from the speed sensor and the carried-in amount sensor, and adjusts the center-of-gravity position of the belt conveyor body based on the predicted conveying condition. A belt conveyor characterized by calculating. In the belt conveyor according to any one of claims 1 to 4,
A belt conveyor, wherein the base portion is self-propelled.

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