JPH0517129B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for controlling the amount of debris scraped by a continuous unloader having an extendable debris scraping section.

[Prior Art] The applicant of the present application filed an application on October 26, 1981 regarding a side-cutting type continuous unloader in which the material scraping section of a bucket conveyor can be expanded and contracted. No. 186736 (Japanese Unexamined Patent Publication No. 1987-
78012)]. In the unloader, the load is scraped off by moving the load scraping section horizontally at a predetermined speed.

[Problems to be Solved by the Invention] However, in the above-mentioned continuous unloader, when the scattered material scraping section is expanded and contracted, the passing scraping area of the bucket for the scattered materials changes, and the scattered material scraping area changes. Since the amount removed also changes, there is a problem that quantitative scraping becomes difficult.

The present invention has been made in view of the above circumstances, with the object of making it possible to perform quantitative scraping even when the scraping section is expanded and contracted.

[Means for Solving the Problems] The present invention provides a continuous unloader equipped with a substantially horizontal material scraping section that can expand and contract in a direction parallel to the traveling direction of the buckets at the lower end of a bucket conveyor having a plurality of buckets. If the length of the scattered material scraping section of the bucket conveyor becomes shorter than the standard length during quantitative scraping operation, the moving speed of the bucket is increased by the length of the shortening, and the said scattered material scraping If the length of the part becomes longer than the standard length, the moving speed of the bucket is slowed down by the length of the length.

[Function] When the length of the part for scraping off the pickled material becomes shorter than the standard length, the moving speed of the bucket is increased by the proportion of the shortened length, and the length of the part for scraping off the collected part is made shorter than the standard length. If the bucket is longer than the previous one, the moving speed of the bucket is slowed down by the proportion of the increased length, so that the area of the bucket that passes over the material to be scraped remains constant, making it possible to scrape off a fixed amount.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

A continuous unloader for use in the method of the invention is shown in FIG. In the figure, 1 is a running frame that runs on a rail 3 laid on a quay 2, 4 is a swing frame that is installed on the running frame 1 and can swing horizontally, and 5 is a swing frame that pivots freely on the swing frame 4. A supported boom, 6 a support frame provided at the tip of the boom 5, 7 a support frame 6
8 is a bucket conveyor disposed to pass through the swing mast 7, and 9 is a bucket conveyor 8 that transports the materials supplied from the bucket conveyor 8 onto the boom 5. A rotary feeder, 11, which supplies the conveyor 10 disposed in
1 is a conveyor for feeding the soybeans supplied from the conveyor 10 to the external conveyor 12; 13 is a belt scale for measuring the weight of the soybeans to be landed; 1;
4 is the boat hold.

The lower end of the bucket conveyor 8 is bent into an L-shape to form a scattered material scraping section 8a.
is designed to be able to expand and contract back and forth by a fluid pressure cylinder 8b to adjust the length L of the scraping part, and also to be able to tilt up and down by a fluid pressure cylinder 8c. The material scraping section 8a can be moved up and down by a pressure cylinder.

The fluid pressure cylinder 8b includes a fluid pressure cylinder 8b.
An encoder is connected to detect the protrusion length (stroke) of the piston rod, and a later-described length detector (indicated by reference numeral 23 in FIG. 1) of the scraping part 8a detects the protrusion length of the piston rod and the scraping part 8a.
By adding the length of the shortest state, the length L of the part to be scraped off can be determined.

Incidentally, the length L of the scattered material scraping section is defined as the length L from the rotation center of the tip sprocket 8d of the scattered material scraping section 8a of the bucket conveyor 8 to the lifting section of the bucket transport chain 8e of the bucket conveyor 8, as shown in FIG. It is the distance to the center.

A control block for performing quantitative scraping with such a continuous unloader is shown in FIG.

In the figure, numeral 21 is a quantitative control device, and the quantitative control device 21 is configured to control the amount of scattered materials actually scraped by the scattered materials scraping section 8a of the bucket conveyor 8 in FIG. 3 and the set amount of scattered materials. The amount of material scraped off is controlled to be a fixed amount based on the amount of scraping, and the average flow rate is calculated at regular intervals from the unloaded amount accumulated by the belt scale 13, and the average flow rate is compared with the set unloaded amount. According to the value, the signal of the amount of prickly matter actually scraped off is corrected, and the amount of prickly matter scraped and the amount of unloaded material can be controlled to be constant. Also 2
2 is based on the output signal from the quantitative control device 21 and the signal detected by the pickled material scraping length detector 23, and the movement of the pickled material scraping portion 8a when the pickled material scraping portion length L changes as shown in FIG. 24 is a speed command output from the calculator 22; 25 is a control device that controls the moving speed of the pickled material scraping unit 8a in FIG. 3 based on the speed command 24; 26 is a pickled material scraper; It is a quantity detector.

There are phototube methods, torque methods, scraping resistance methods, and other methods for detecting the amount of material scraped by a single bucket. For example, in the case of the phototube method, the amount of time the bucket is blocking light is measured using a phototube. control so that it remains constant. To explain this with reference to FIG. 2, let t _po be the time of light transmission between the buckets 27 and t _co be the time of light blocking by the buckets 27 and the scattering materials 28, then t _co /t _po +t _co = t _co /T _o = t _R (constant).

When scraping the materials, the external conveyor 12, conveyors 11 and 10, rotary feeder 9, and bucket conveyor 8 are driven, and as necessary, the revolving frame 4 rotates, the boom 5 rises and falls, etc.
The unloading of the sukimono 28 is carried out. At this time, the signal detected by the scraped material scraping amount detector 26 is transmitted to the quantitative control device 21, and the signal of the unloaded amount accumulated by the belt scale 13 in FIG.
Then, the quantitative control device 21 performs quantitative control as described above, and the detected amount of scattered materials, the detected and corrected amount of collected materials, and the set amount of scattered materials are transmitted. If there is a difference between them, a deviation signal corresponding to the difference is sent to the calculator 22.

When the length L of the pickled material scraping section is a predetermined length as a reference, the deviation signal is not modified in any way and is sent as a speed command 24 to the city control device 25 that controls the moving speed of the pickled material scraping section 8a. By controlling the feeding speed of the bucket 27 to a predetermined speed, the pickled material scraping section 8a shown in FIG. Further, the amount of garbage scraped by the garbage scraping section 8a is detected by the garbage scraping amount detector 26 and sent to the quantitative control device 21, where the above-mentioned control is performed.

On the other hand, when the length L of the part to be scraped off changes, the change is detected by the part length detector 23 and sent to the arithmetic unit 22. The object scraping length signal is subjected to a predetermined calculation in the calculator 22, and the speed command 24 is set so that the moving speed of the object scraping section 8a is increased or decreased in accordance with the change in the object scraping section length L. is sent to the control device 25, and the bucket 27 of the material scraping section 8a moves at a predetermined speed. For example, if the length L of the scraping part becomes shorter than the standard length, the moving speed of the bucket 27 will increase by the proportion of the shorter length, and the length L of the scraping part will become longer than the standard length. If the length is longer, the moving speed of the bucket 27 will be reduced by the lengthened ratio. Therefore, even if the length of the pickled material scraping section 8a changes, fluctuations in the amount of pickled material scraped can be prevented, and quantitative scraping can be performed.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] According to the method for controlling the amount of scattered material scraped by a continuous unloader of the present invention, even if the length of the scattered material scraping section changes, the moving speed of the scattered material scraping section can be adjusted by the amount of change. You can control Bucket's movement speed,
It is possible to achieve excellent effects in that the accuracy of scraping the pickled material is improved and accurate quantitative scraping can be performed.

[Brief explanation of the drawing]

FIG. 1 is a control block diagram of a method for controlling the amount of scraped objects scraped by a continuous unloader of the present invention, and FIG. 2 is a principle showing an example of how to detect the amount of scraped objects used in the control method of FIG. 1. 3 are side views of a continuous unloader to which the method of the present invention is applied. In the diagram, 5 is a boom, 8 is a bucket conveyor, 8
21 is a quantitative control device, 22 is a computing unit, 23 is a length detector for the material scraping section, 24 is a speed command, 25 is a control device for the moving speed of the material scraping section, and 26 is a 27 is a bucket, 28 is a dumpling amount detector, and L is the length of a dumpling portion to be scraped off.

Claims (1)

[Claims] 1. In a continuous unloader equipped with a substantially horizontal material scraping section that can expand and contract in a direction parallel to the bucket travel direction at the lower end of a bucket conveyor having a plurality of buckets, the bucket conveyor is When the length of the pickled material scraping section becomes shorter than the standard length, the moving speed of the bucket is increased by the proportion of the shortened length, and the length of the pickled material scraped section becomes longer than the standard length. A continuous unloader method for controlling the amount of material scraped by a continuous unloader, characterized by slowing down the moving speed of the bucket by an amount corresponding to the increased length.