JPH05301621A - Belt conveyer - Google Patents

Abstract

PURPOSE:To prevent the generation of detecting error due to the deformation of a carrier belt for the constant control of the conveyance amount of articles to be carried per unit hour by detecting the amount of the articles to be carried before the articles to be carried are moved onto a carrier belt from the inside of a hopper. CONSTITUTION:Articles 2 to be carried in a hopper 10 is made roughly uniform by a screw conveyer 11 and guided to a carrier belt 1. At this time, the amount of the articles to be carried which are subjected to a TV camera 13, an image processing means 14 and a computation means 15 is detected. Next, the detection amount is compared with a preset reference conveyance amount to compute the rotational speed of the screw conveyer 11 and send a signal corresponding to the rotational speed to a motor 12. As a result, the rotational speed of the screw conveyer 11 changes, and the amount of the articles to be carried which are guided to a carrier conveyer 1 is regulated so that it may reach the reference conveyance amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyer device for conveying, for example, excavated earth and sand, and more particularly to a belt conveyer device for controlling a constant amount of an object to be conveyed per unit time. ..

[0002]

2. Description of the Related Art A belt conveyor device according to the prior art of this type detects a load amount of a transported object on a transport belt as disclosed in Japanese Patent Laid-Open No. 61-287615 and detects the detected load amount. The moving speed of the conveyor belt is controlled based on the above. A belt conveyor device according to this conventional technique will be described with reference to the configuration diagram shown in FIG. As shown in FIG. 6, the conventional belt conveyor device is
A conveyor belt 1 for conveying an object 2 to be conveyed such as earth and sand, and conveyor belt driving means for driving the conveyor belt 1,
A motor 4, a detection device 5 for detecting the load amount of the transported object 2 on the transport belt 1, and a signal from the detection means 5 are input, and the detected load amount of the transported object 2 is preset. The control means 6 calculates the rotation speed of the motor 4 that does not exceed the maximum axial force of the motor 4 based on the maximum loading amount, and controls the rotation speed of the motor 4 according to the calculation result.

In the conventional example having such a configuration, the load amount of the conveyed objects 2 on the conveyor belt 1 detected by the detecting means 5 is input to the control means 6. The control means 6 calculates the difference between the preset maximum load amount and the detected load amount, and outputs a signal corresponding to this difference to the motor 4 as a drive signal. The rotation speed of the motor 4 changes according to this drive signal. Along with this, the operating speed of the conveyor belt 1 also changes.

Therefore, according to this conventional example, since the rotation speed of the motor 4 changes in accordance with the load amount of the conveyed objects 2 on the conveyor belt 1, the axial force of the motor 4 does not exceed the maximum axial force. In addition, when the loading amount is small, the conveying speed is high, so that the work efficiency is improved.

[0005]

However, the above-mentioned prior art has the following drawbacks. That is, (1). The speed of the conveyor belt 1 at the time when the conveyed object 2 is loaded on the conveyed belt 1 is the previously detected conveyed object 2
The speed is based on the loading capacity of. On the other hand, in order to correct the speed according to the detected load amount, it is necessary to detect the load amount by the detection means 5 and to calculate the drive signal to the motor 4, and these calculation processes are required. It takes time. Therefore, an excessive load may be applied to the motor 4 within this processing time.

(2). Since the conveyor belt 1 is deformed by the weight of the transported object 2 to be stacked, it is not possible to accurately detect the stacked amount by the detecting means 5. Therefore, an excessive load may be applied to the motor 4 in some cases. In order to prevent this, if the maximum load capacity is set low, the work efficiency will be reduced.

The present invention has been made in view of the above problems of the prior art. An object of the invention of claim 1 is to detect the amount of a conveyed object before mounting the conveyed object on a conveyor belt. However, it is another object of the present invention to provide a belt conveyor device that controls the amount of the conveyed objects so as to be a preset reference load amount.

An object of the present invention is to detect the amount of the transported object before mounting the transported object on the transport belt and mount the transported object on the transport belt according to the detected amount. It is to provide a belt conveyor device for controlling the conveying speed before.

[0009]

In order to achieve the above object, the invention according to claim 1 of the present invention comprises a conveyor belt,
Conveyor belt driving means for driving the conveyor belt, a hopper for receiving an object to be conveyed supplied from the outside, a screw conveyor provided in the hopper for guiding the conveyor belt, and a screw conveyor drive for driving the screw conveyor. In a belt conveyor device including means, a detection means for detecting the amount of the conveyed object in the hopper, and a signal from the detecting means is input, and the guide amount of the conveyed object to the conveyor belt is preset. The rotation speed of the screw conveyor, which is the reference conveyance amount, is calculated, and a calculation unit that outputs a signal according to the calculation result to the screw conveyor driving unit is provided.

The invention according to claim 2 is a conveyor belt, a conveyor belt driving means for driving the conveyor belt, a hopper for receiving an object to be conveyed supplied from the outside, and a hopper provided in the hopper. In a belt conveyor device equipped with a screw conveyor for guiding the conveyor belt and a screw conveyor driving means for driving the screw conveyor, a detecting means for detecting the amount of the conveyed object in the hopper, and a signal from the detecting means. Is input to calculate the transport speed of the transport belt that does not exceed the maximum axial force set in the transport belt driving means, and outputs a signal according to the calculation result to the transport belt driving means. It is characterized by having.

[0011]

Since the invention according to claim 1 is configured as described above, the transported object supplied from the outside is once stored in the hopper. This object to be conveyed is made almost uniform by the screw conveyor in the hopper and is guided to the conveyor belt. At that time, the amount of the transported object discharged from the hopper to the transport belt is detected. The detected amount of the conveyed object by the detecting means is output to the calculating means. The calculation means compares the detected amount with a preset reference carry amount, and calculates the rotation speed of the screw conveyor in which the amount of the guided object guided to the carrying belt becomes the reference carry amount. Then, a signal corresponding to the calculated rotation speed of the screw conveyor is output to the screw conveyor driving means. As a result, the rotation speed of the screw conveyor changes, and the amount of the conveyed object guided to the conveying belt is adjusted to be the reference conveying amount.

Therefore, according to the first aspect of the invention, since the amount of the conveyed object is detected before the conveyed object is transferred from the hopper to the conveying belt, a detection error occurs due to the deformation of the conveying belt. Never. Further, since the load amount of the transported objects loaded on the transport belt becomes the preset standard transport amount, an excessive axial force is not generated on the transport belt driving means.

According to the second aspect of the present invention, the detection means detects the amount of the conveyed object conveyed to the conveyor belt by the screw conveyor, and the detected amount is output to the calculation means. The calculation means calculates the transport speed of the transport belt which does not exceed the preset maximum axial force of the transport belt drive means based on the detected amount, and outputs a signal corresponding to this transport speed to the transport belt drive means. The conveyor belt driving means drives the conveyor belt at a speed according to the drive signal.

Therefore, according to the second aspect of the present invention, the conveying speed is corrected according to the amount of the conveyed object guided by the screw conveyor before the conveyed object is loaded on the conveyor belt. An excessive axial force does not occur on the conveyor belt driving means. Further, since it is not necessary to set the maximum load amount to a low value, work efficiency can be secured.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 are explanatory views of a first embodiment of a belt conveyor device according to claims 1 and 3 of the present invention, and FIG. 1 is a configuration of the first embodiment. FIG. 2 and FIG. 2 are the detection means provided in the first embodiment, and
FIG. 3 is a flow chart showing the procedure of processing by the calculation means.
FIG. 4 is an explanatory view of the conveyance amount detection by the detection means, and FIG. 4 is a diagram showing the relationship between the rotation speed of the screw conveyor and the amount of soil discharged onto the conveyance belt. In addition, this 1st Example is aimed at the belt conveyor which conveys earth and sand. Further, the same parts as those of the above-mentioned conventional technique are designated by the same reference numerals.

As shown in FIG. 1, the belt conveyor apparatus according to the first embodiment has a conveyor belt 1, a conveyor belt driving means for driving the conveyor belt 1, that is, a motor 4, and a member supplied from the outside. A hopper 10 for receiving a conveyed item, that is, the earth and sand 2 ', and this hopper 10
A screw conveyor 11 for guiding the conveyor 2 to the conveyor belt 1 while uniformizing the supplied sediment 2 ', a screw conveyor driving means for driving the screw conveyor 11, that is, a motor 12, and a sediment 2'from a hopper. The image pickup means, for example, the TV camera 13 and the image signal from the TV camera 13, which are provided in the vicinity of the outlet through which the water is discharged and detect the condition of the soil 2 ′ guided by the screw conveyor 11, are input to this image. An image processing means 14 for performing image processing to calculate the amount of earth and sand 2 ′ guided by the screw conveyor 11, and a rotation speed of the screw conveyor is calculated and output based on the amount of earth and sand 2 ′ calculated by this image processing means 14. And the calculation means 15 for

In the belt conveyor apparatus according to the first embodiment having the above-mentioned configuration, the arithmetic processing is executed according to the flowchart of FIG. 2 which is the processing procedure of the image processing means 14 and the arithmetic means 15.

First, as shown in step S1, the image processing means 14 inputs a video signal relating to the condition of the earth and sand 2'guided from the TV camera 13 through the signal line 16 to the screw conveyor 11.

Next, in step S2, the input video signal is subjected to image processing to calculate the amount of earth and sand 2'guided from the screw conveyor 11. TV camera 13
From this, an image as shown in FIG.
In general, when a video signal is stored in a memory as image data, one screen is made up of an aggregate called a pixel, and each pixel of the stored image data is binarized. The area calculation can be easily performed by. For example, it is possible to calculate the area A ″ of the detected earth and sand 2 ′ by counting the number of pixels corresponding to A ”in FIG. 3A and multiplying the number of pixels by the area per pixel.

The area A "corresponding to the amount of the earth and sand 2'is sent to the calculation means 15 via the signal line 17. The calculation means 15".
Then, as shown in step S3, the area A ″ input from the image processing means 14 is compared with a preset reference carry amount. For example, when the reference carry amount is captured as an image, FIG.
Assuming that the area is A as shown in (b), the procedure S2
The difference A ′ = A−A ″ from the area A ″ calculated in step can be easily obtained.

Next, in step S4, the rotation speed of the screw conveyor 11 for guiding the soil 2'to the conveyor belt 1 is calculated based on the comparison result. Screw conveyor 11
As shown in FIG. 4, the relationship between the rotation speed of No. 1 and the amount of soil discharged to the conveyor belt 1 is in a substantially proportional relationship. Therefore, the difference A ′ from the reference carry amount calculated in step S3 is multiplied by the proportional coefficient to obtain the reference screw conveyor 11
The screw conveyor 1 that guides the earth and sand corresponding to the reference conveyance amount to the conveyance belt 1 by adding to the rotation speed of
The rotation speed of 1 can be calculated.

Next, in step S5, a drive signal to the motor 12 for realizing the rotation speed of the screw conveyor 11 calculated in step S4 is output.

By the above arithmetic processing, the drive signal of the motor 12 output from the arithmetic means 15 is transmitted to the motor 12 via the signal line 18 and the motor 12 rotates at the corresponding rotation speed. Then, the earth and sand 2'in the hopper is loaded on the conveyor belt 1 according to this rotation speed.

Therefore, according to this first embodiment,
Since the amount of soil is calculated before the soil 2'is discharged onto the conveyor belt 1, a detection error due to the deformation of the conveyor belt 1 does not occur. Further, since the rotation speed of the screw conveyor 11 is controlled according to this, the conveyor belt 1
The soil amount corresponding to the reference transport amount is always guided to. As a result, the earth and sand 2 loaded on the conveyor belt 1 has a preset reference conveyance amount, so that an excessive axial force is not generated on the motor 4.

FIG. 5 is an explanatory diagram of a second embodiment according to claims 2, 4, and 6 of the present invention, and is a diagram showing the configuration of the second embodiment. The same parts as those in the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 5, this second embodiment is
Conveyor belt 1 and motor 4 for driving the conveyor belt 1.
A hopper 10 for receiving the earth and sand supplied from the outside, a screw conveyor 11 provided in the hopper 10 for evenly supplying the earth and sand, a motor 12 for driving the screw conveyor 11, and a screw conveyor 11 And a detection chamber 23 for temporarily storing the sediment guided by the measuring chamber 23 and measuring its weight.
Is mounted via the springs 21a and 21b, the weight detection means 20 for detecting the weight thereof and the weight detected by the weight detection means 20 are inputted, and the weight of the motor 4 is detected from the weight and the maximum axial force of the motor 4. The calculation means 24 calculates the rotation speed and outputs a drive signal corresponding to the rotation speed to the motor 4.

In the second embodiment constructed as described above,
The earth and sand supplied to the hopper 10 are screw conveyor 11
Is temporarily stored in the detection chamber 23. This storage room 2
Since No. 3 is placed on the weight detecting means 20 via the springs 21a and 21b, the total weight changes according to the amount of earth and sand. The calculation means 24 inputs this weight signal through the signal line 25, subtracts the weight of the detection chamber 23 itself, and detects the weight of the detection chamber 2
Calculate the weight of earth and sand in 3. By the way, the conveyor belt 1
The axial force N of the motor 4 for driving the motor 4 is, as described in the above-mentioned Japanese Patent Laid-Open No. 61-287615, an axial force N1 proportional to the conveying speed in an unloaded state and an axial force proportional to the load. The sum with the force N2, that is, N = N1 + N2. Therefore, when the weight of the earth and sand is detected, the axial force N2 corresponding to the weight of the earth and sand is calculated, and by subtracting N2 from the preset maximum axial force N of the motor 4, the axial force N1 proportional to the transport speed is obtained. Can be calculated. When the weight of the earth and sand in the detection chamber 23 is detected, the calculation means 24 executes the above calculation to calculate the rotation speed of the motor 4 corresponding to the axial force N1, and outputs a drive signal corresponding to this. Output to the motor 4. The motor 4 sends this drive signal to the signal line 2
Input via 6 and rotate at a speed corresponding to this. After being corrected to this speed, the sediment stored in the detection chamber 23 is
It is discharged onto the conveyor belt 1.

Therefore, according to this second embodiment,
In addition to the same effect as in the first embodiment, the transport speed is corrected according to the amount of earth and sand guided to the screw conveyor 11 before the earth and sand are loaded on the conveyor belt 1.
No excessive axial force is generated on the motor 4. Further, since it is not necessary to set the maximum load amount to a low value, work efficiency can be secured.

[0030]

According to the first aspect of the present invention, since the amount of the conveyed object is detected before the conveyed object is transferred from the hopper to the conveying belt, the detection error due to the deformation of the conveying belt is detected. Does not occur. Further, since the load amount of the transported objects loaded on the transport belt becomes the preset standard transport amount, an excessive axial force is not generated on the transport belt driving means.

Further, according to the second aspect of the invention, the conveying speed is corrected according to the amount of the conveyed object guided by the screw conveyor before the conveyed object is loaded on the conveyor belt. No excessive axial force is generated on the conveyor belt driving means. Further, since it is not necessary to set the maximum load amount to a low value, work efficiency can be secured.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of a belt conveyor device according to the present invention.

FIG. 2 is a flowchart showing a processing procedure in the first embodiment.

FIG. 3 is an explanatory diagram of an image obtained from the TV camera provided in the first embodiment.

FIG. 4 is a diagram showing the relationship between the rotation speed of the screw conveyor and the amount of soil discharged.

FIG. 5 is a configuration diagram of a second embodiment according to the present invention.

FIG. 6 is a configuration diagram of a belt conveyor device according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 conveyor belt 2 earth and sand (object to be conveyed) 4 motor (conveyance belt driving means) 10 hopper 11 screw conveyor 12 motor (screw conveyor driving means) 13 TV camera (imaging means) 14 image processing means 15 computing means 20 weight detection means 23 Detection room 24 Computing means

Claims (5)

[Claims] 1. A conveyor belt, conveyor belt driving means for driving the conveyor belt, a hopper for temporarily storing an object to be conveyed supplied from the outside, and a hopper provided in the hopper for guiding the conveyor belt. Screw conveyor,
In a belt conveyor device equipped with a screw conveyor driving means for driving the screw conveyor, a detecting means for detecting the amount of the conveyed object in the hopper, and a signal from the detecting means are inputted to the conveying belt. A guide means for calculating the rotation speed of the screw conveyor that serves as a reference carry amount that is set in advance, and a calculation means for outputting a signal according to the calculation result to the screw conveyor drive means. A characteristic belt conveyor device. 2. A conveyor belt, conveyor belt driving means for driving the conveyor belt, a hopper for temporarily storing an object to be conveyed supplied from the outside, and a guide provided to the conveyor belt provided in the hopper. Screw conveyor,
In a belt conveyor device equipped with a screw conveyor driving means for driving the screw conveyor, a detecting means for detecting the amount of the conveyed object in the hopper, and a signal from the detecting means are inputted to the conveying belt driving means. A belt conveyer, comprising: a transport speed of the transport belt that does not exceed the maximum axial force set in step 1, and a calculation unit that outputs a signal according to the calculation result to the transport belt drive unit. apparatus. 3. The detecting means comprises image pickup means and image processing means for calculating the amount of the transported object in the hopper based on the image information obtained by the image pickup means. The belt conveyor device according to item 1 or 2. 4. The detecting means comprises a weight detecting means for detecting a weight and a weight calculating means for calculating a weight of an object to be conveyed in the hopper based on a signal from the weight detecting means. The belt conveyor device according to claim 1 or 2. 5. The belt conveyor device according to claim 1, wherein the hopper includes a detection chamber for detecting the amount of the conveyed object conveyed by the screw conveyor. ..