JPH10297743A - Conveyor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grasp a conveyance situation of an object to be conveyed accurately by setting a delivery position of the object to be conveyed based on a detection signal of a distance sensor which is arranged in an upper part of a conveyor belt for conveyance and detects a distance from the objects. SOLUTION: A center of gravity detection means (control part) Y detects the center of gravity of an object to be conveyed H based on a detection signal when it receives the detection signal from a threshold filter X. To explain concretely, a shift amount of a conveyance position of the object to be conveyed H from a central tip of a conveyor belt 2 for carrying is calculated by calculating the center of gravity of the object to be conveyed H based on the results of the detection of three points of distance sensors SC, SL, SR. A controller Z operates an actuator 5 based on the results of calculation when it receives the results of calculation from the center of gravity detection means Y to set a position a correction plate 4. Positions of both fringe parts Ha, Hb of the object to be conveyed H are also corrected by dropping the object to be conveyed H. In this way, a delivery means 3 sets a position of the object to be conveyed H dropped from a supply conveyor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor apparatus, and more particularly to a technique suitable for preventing a conveyor belt from being shifted or uneven.

[0002]

2. Description of the Related Art In a conveyor apparatus, when ore, coal, earth and sand, etc. are transported over a long distance of several hundred meters to 1,000 meters, the conveyor belt shifts, that is, a so-called conveyor belt meandering phenomenon occurs. As a technique for preventing the meandering of the belt, for example, Japanese Utility Model Laid-Open No. 6-3382.
Japanese Patent Application Laid-Open No. 9-1990 discloses a "belt conveyor belt shift detecting device".

In the above-mentioned technology, when the belt is shifted on the conveyor, the pattern signal generating means is operated by rotation of the roller to transmit a waveform pattern signal to a remote position, and the position where the conveyor belt is shifted is determined. I try to be specific.

In other words, the detection device is simplified, the location of the occurrence of the offset phenomenon is ensured, and the location of the occurrence of the offset phenomenon is specified at a remote location, so that the occurrence of the offset phenomenon is detected. Inspection and restoration work at the time are performed promptly.

[0005]

However, when the transport distance is long, even if the location of the belt shift phenomenon is specified, confirmation, inspection, operation, etc. of the site position and situation are performed manually. You have to rely on them, and you have to consider the labor and time of the workers who go to and from the site. In addition, since the location where the belt deviation phenomenon occurs is specified, a method of repairing the belt deviation using an automatic adjustment core or the like can be considered. It becomes necessary to provide a plurality of components and the like, which tends to increase costs. On the other hand, even if a conveyed object is placed at the center of the conveyor belt, when the conveyed object is dispensed and taken over to another conveyor belt, if the position of the conveyed object is shifted, it will be conveyed without being corrected, and the conveyed accuracy of the conveyed object will be reduced. You will lose.

[0006] The present invention has been made in view of such problems, and has the following objects. Ensure that the status of transported goods is understood. Correctly and promptly correct the position of the conveyed goods. To reduce the occurrence of meandering phenomenon of the supply conveyor. Reduce the maintenance effort and cost of conveyor equipment. Improve the transport accuracy of the transported object.

[0007]

A conveyor device having a function of detecting a deviation of a conveyed object and correcting a conveyed position, the distance being arranged above a conveyer conveyor belt and detecting a distance from the conveyed object. A technique is employed in which a sensor and a payout unit that is disposed above the conveyor belt and that sets the payout position of the conveyed article based on a detection signal of the distance sensor are employed. In this case, the dispensing means is provided with a correction plate that is brought into contact with the conveyed object and an actuator that operates the correction plate to continuously correct the position of the conveyed object. A plurality of distance sensors are arranged at a position downstream in the width direction at a downstream position of the front end of the conveyor, and the distance sensors are ultrasonic distance sensors. A threshold filter is connected to the distance sensor to determine whether or not the height of the conveyed object exceeds a threshold value based on the detection signal. A technique is adopted in which a controller for setting the position of the payout means based on the detection result is connected to the center of gravity detection means. In the threshold filter, a threshold for the height of a conveyed object at which belt meandering is considered to occur is set for each measurement position. If the detection signal is smaller than this threshold, the center of gravity is determined. The detection means is not operated. On the other hand, when the detection signal is transmitted from the threshold filter to the center-of-gravity detecting means, the position of the center of gravity of the conveyed object is detected by the center-of-gravity detecting means, and the deviation of the conveyed object is determined based on the detection result of the center of gravity. The degree is calculated and transmitted to the controller. Upon receiving the detection result from the center-of-gravity detection means, the controller operates the actuator based on the detection result, sets the payout position, and guides the position at which the conveyed object is dropped. For this reason,
The conveyed object is dropped from the supply conveyor in a state where the position is corrected by the dispensing means, and is placed at the center without causing the conveyance conveyor to be shifted (the center of gravity of the conveyance conveyor belt is centered on the belt). Transported in a state where they overlap each other).

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a conveyor device according to the present invention will be described below with reference to FIGS.

In the figure, reference numeral 1 denotes a conveyor device, 2 denotes a conveyor belt, 3 denotes a payout means, 4 denotes a correction plate, 5 denotes an actuator, 11 denotes a supply conveyor, H denotes a conveyed object,
SC, SL, and SR are distance sensors, X is a threshold filter, Y is a center of gravity detection means (control unit), and Z is a controller.

The conveyor device 1 includes a conveyor belt 2, a delivery unit 3, a correction plate 4, an actuator 5, a threshold filter X, a center of gravity detection unit (control unit) Y, a controller Z, Is provided.

The conveyor belt 2 is an endless belt, and conveys the articles H dropped from the payout means 3 as shown by white arrows in FIG. .

The payout means 3 is arranged at the upper end of the conveyor belt 2 and sets the position of the conveyed object H dropped from the supply conveyor 11.

As shown in FIGS. 1 to 4, the correction plates 4 are arranged as a part of a lower portion of the payout means 3 so as to form a pair. The correction plates 4 are moved by an actuator 5 in the width direction of the conveyor belt 2. Is moved to
This is to correct the position of dropping.

As the distance sensors (SC, SL, SR), an ultrasonic level meter or the like for measuring a distance by using the reflection of ultrasonic waves is employed. As shown in FIG. It is arranged on the side and is attached to the support column 21 downward, and the center of the transported material H of the transporting conveyor belt 2,
The left and right heights are detected.

In the threshold value filter X, it is determined whether or not the height of the conveyed object H is such that the belt meanders when the conveyed phenomenon occurs. For each distance sensor (S
When the detection signal at (C, SL, SR) is smaller than the threshold value, the center of gravity detecting means (control unit) Y is not operated. In other words, when the transport amount is small,
Even in the case where the transported object H is skewed, the transported object H is transported without performing position correction.

Upon receiving the detection signal from the threshold filter X, the center-of-gravity detecting means (control section) Y detects the center of gravity of the conveyed object H based on the detection signal. In particular,
By calculating the center of gravity of the conveyed object H based on the detection results of the three points of the distance sensors (SC, SL, SR), the deviation amount of the conveyed position of the conveyed object H from the center line of the conveyer conveyor belt 2 is calculated. Is done.

When the controller Z receives the calculation result from the center-of-gravity detecting means (control section) Y, the controller Z operates the actuator 5 based on the calculation result, and
Set the position of. That is, as shown in FIGS. 2 and 4, the drop position of the transported object H is corrected based on the adjustment of the correction plate 4 so that the amount of deviation from the center line of the transporting conveyor belt 2 becomes 0, and It is mounted on the conveyor belt 2 with its center of gravity centered, and is conveyed downstream as indicated by the white arrow in FIG. By dropping the conveyed object H in this manner, the positions of both edges Ha and Hb of the conveyed object H are also corrected.

A supplementary description of the technique for preventing the transported object H from shifting will be described. The method of supplying the load to the transporting conveyor belt 2 is as follows. Is supplied based on free fall and guidance by the payout means 3 (chute), the transport speed of the supply conveyor 11, the amount of load,
In FIG. 4, arrows indicated by broken lines,.
As shown by, the falling trajectory of the transported object H may vary. Then, the correction plate 4 is made to intersect with the conveyed object H dropped by the payout means 3 so that the position of the conveyed object H (the center of gravity of the cross section) is located at the center of the conveyor belt 2 for conveyance. Based on the position information of (SL, SR), the drop position by the payout means 3 and the correction plate 4 is corrected.

The payout means 3 does not necessarily require a chute, but can be variously changed. For example, the position of the chute may be directly adjusted.

[0020]

According to the conveyor device of the present invention, the following effects can be obtained. (1) By detecting the height of the conveyed object with the distance sensor, it is possible to reliably grasp the conveyed state of the conveyed object. (2) By detecting the height from above using an ultrasonic distance sensor, it is possible to reduce misunderstanding of the transport situation even if the transported object is easily scattered such as powdered coal. (3) By disposing the dispensing means and the correction plate near the upstream end of the conveyor belt, it is possible to reliably correct the position of the conveyed product and to improve the responsiveness at that time. (4) Since the transported object is supplied onto the transporting conveyor belt with the center of gravity corrected, the meandering of the belt after the takeover can be reduced, and the transporting accuracy of the transported object can be improved. (5) The occurrence of belt meandering can be suppressed, and maintenance labor and costs can be reduced. (6) By supplying the sheet to the conveyor belt while correcting the position with the correction plate, the conveyance accuracy of the conveyed object can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view with a block diagram illustrating an embodiment of a conveyor device according to the present invention.

FIG. 2 is a front sectional view showing a payout unit of FIG. 1;

FIG. 3 is a side sectional view showing an arrangement state of a payout unit and a distance sensor of FIG. 1;

FIG. 4 is a front sectional view showing a situation in which the position of a falling object is corrected by the payout unit and the correction plate of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor apparatus 2 Conveyor belt 3 Paying-out means 4 Correction plate 5 Actuator 11 Supply conveyor 21 Column H Conveyed object Ha, Hb Edge SC, SL, SR Distance sensor X Threshold filter Y Center of gravity detection means (control unit) Z controller

Claims (6)

[Claims] A conveyor device (1) for detecting a deviation of a conveyed object (H) and correcting a conveyed position, wherein the conveyor device is disposed above a conveyer conveyor belt (2) and detects a distance from the conveyed object. Distance sensors (SC, SL, SR) to be provided and payout means (3) disposed above the conveyor belt for setting the payout position of the conveyed article based on a detection signal of the distance sensor. Conveyor equipment. 2. A plurality of distance sensors (SC, SL, SR) are arranged below the front end of the conveyor device (1) and spaced apart in the width direction. Conveyor device. 3. The conveyor device according to claim 1, wherein the distance sensors (SC, SL, SR) are ultrasonic distance sensors. 4. A threshold filter (X) is connected to the distance sensors (SC, SL, SR) to determine whether the height of the conveyed object (H) exceeds a threshold value based on the detection signal, A center of gravity detecting means (Y) for detecting the center of gravity of the conveyed object is connected to the threshold value filter, and a controller (Z) for setting the position of the payout means (3) based on the detection result is connected to the center of gravity detecting means. 4. The conveyor device according to claim 1, wherein the conveyor device is operated. 5. The conveyor according to claim 1, wherein the conveyed object (H) is dropped from the supply conveyor (11) in a state where the position is corrected by the dispensing means (3). Conveyor device. 6. A dispensing means (3) is provided with a correction plate (4) for making contact with a conveyed object (H) and an actuator (5) for operating the correction plate to correct the position of the conveyed object. The conveyor device according to claim 1, 2, 3, 4, or 5, characterized in that: