JPS63206618A - Weight selecting and correcting system - Google Patents

Abstract

PURPOSE:To save labor and improve a selecting accuracy by measuring the weight of an object to be selected, judging the kind of the object by comparing the weight with a reference weight, classifying the objects being selected into proper, correctable and uncorrectable groups and correcting the weights of the correctable group. CONSTITUTION:An object D to be selected slides to move on transfer rollers 2 under its own weight and the weight of the object D is measured by a load cell 5. A control circuit unit takes-in a measured value, judges the kind of the object from a reference weight value for every kind, judges whether the object D is within the allowance of the reference weight value (a proper object), exceeds the reference weight value (a correctable object) or smaller than it (uncorrectable object) and discharges 8 the uncorrectable object by operating a discharger. The correctable object is moved to a prescribed position and holes are perforated by operating a weight corrector F. Then, the object is moved above a load cell 13 to be weighed and whether the object is within the allowance (the proper object) or not a (defective) is judged. Thus, the first proper object and the proper objects and the defectives after weight correction are moved to a distributing and stacking apparatus B and distributed in three directions by the rotation of a distributing plate.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a weight selection correction system for tablets made of powdered resin.

[Background Art J Conventionally, weight selection and weight correction of this type of object have been performed manually. However, since the correction is done manually, there is a problem in that the correction variation is large.

[Objective of the Invention] The present invention has been made in consideration of the above points, and its purpose is to automatically correct the weight of the objects to be sorted to save labor and improve weight accuracy. To provide a sorting correction system.

[Disclosure of the Invention 1] The present invention determines the type of the material to be sorted based on a reference weight set in advance for each product type, and selects the material to be sorted within the permissible weight range of the reference weight. A pre-weighing process in which items to be sorted that exceed the weight range are determined to be correctable items, and items to be sorted that are lighter than the allowable weight range are determined to be uncorrectable items, and items to be sorted that are determined to be uncorrectable items in the pre-weighing process. A discharge process in which objects are discharged, a weight correction process in which the weight M is corrected by excluding a part of the objects to be sorted that were determined to be objects that can be corrected in the pre-weighing process, and the objects to be sorted whose weight has been corrected in the weight correction process. A post-weighing process determines whether the weight of the item is within the allowable weight range of the reference weight and determines whether the item is acceptable or defective, and the items determined to have an appropriate weight in the pre-weighing process are sorted by type. The present invention is characterized in that it includes at least a step of sorting objects to be sorted that are determined to be defective in the post-weighing step.

The system of the present invention will be explained below using examples.

The device of this embodiment system is composed of a weight sorting correction device A, a stacking device B for sorting, and a weight sorting correction device B.
The periphery is covered with a surrounding plate 1, and a conveyance NC with conveyor rows 22 arranged inside thereof is provided inclined downward, and the opening at the upper end of the conveyance path C serves as an entrance for carrying in the materials to be sorted. .

The conveyance path C is provided with a stopper 4 near the entrance, which is driven up and down by an air cylinder 3 to control the downward movement of the tablet-shaped objects to be sorted.
A load cell 5 is disposed at the lower part of the conveyance path C at the front position of the r) a-docel 5, and the load cell 5 measures the weight of the object to be sorted riding on the conveyance path C at the upper part of the a-dossel 5. . A stopper 7 is provided on the transport path C in front of the measuring position where the load cell 5 measures the weight of the object to be sorted, and is driven up and down by an air cylinder 6 to control the forward movement of the object to be sorted. .

Further, in the conveyance path C in front of the position of the stopper 7, a bottom portion having a plurality of conveyance rollers 2 is rotated and opened, and the object to be sorted moving on the conveyance path C is provided below the bottom. A correction unusable object ejector E is provided to drop and collect the unusable object inside the unusable object collection $8.

Furthermore, the conveyance path C ahead of this uncorrectable material discharger E
There is a weight compensator F that corrects the weight by making a hole in the material to be sorted by protruding the tip of a drill blade from below the bottom of the conveyance path C, and a material to be sorted that is drilled by the weight corrector F. A presser G is provided, which is held down by a presser plate 10 which is driven vertically by an air cylinder 9, and an id 12 which is driven vertically by an air cylinder 11 to determine the position of the material to be sorted to be perforated by a weight compensator F. There is.

Furthermore, the conveyance roller 2 of the conveyance path C in front of this side 12
A second load cell 13 is provided at the bottom of the load cell 13, and the load cell 13 measures the weight of the weight-corrected material to be sorted that moves onto the transport row 22 above the load cell 13. . A stopper 15 is provided on the conveyance path C at this weight measurement position, which is driven up and down by an air cylinder 14 and controls the forward movement of the object to be sorted.

On the other hand, the stacking device B is connected to the lower end of the conveyance path C of the weight sorting and correction device A, and the sorted #JD that has been moved from the weight sorting and correction device A is moved by the plate 16. The path is divided into three types, divided into two types of materials to be sorted, one of proper weight and one of defective material, and the material to be sorted of appropriate weight is dropped into chutes 17a and 17b provided for each type. They are stacked one after another on the plates 18a and 18b, and when a predetermined amount is stacked, they are stacked and the objects to be sorted are conveyed forward by the conveyor 19. Each receiver is a plate 18a, 18
b can be moved up and down by self-locking cylinders 20a and 201t, and during stacking, it is lowered in stages according to the fall of the objects to be sorted. In the figure, 21g and 21b are stoppers that determine whether the material to be sorted is discharged to shoe 17a or 17b, and each stopper 21a, 21b is driven back and forth by air cylinders 22a, 22b.

Next, the operation will be explained with reference to the circuit configuration shown in FIG. 2 and the flowchart shown in FIG.

First, when the object to be sorted put into the carry-in path C from the carry-in entrance is detected by the detection sensor s1 such as a charging switch, the stopper 4 is moved to the conveyance path C by the air cylinder 3 under the control of the control circuit section H. The stopper 4 is made to protrude further, and the forward movement of the object to be sorted is restricted by this stopper 4. and load cell 5
If the detection sensor s2, such as a photoelectric switch, detects that there is no material to be sorted in the weight measurement area, the wrist collar 4 is lowered by air cylinder 3 under the control of the control circuit section H. At the same time, the stopper 7 is made to protrude from the conveyance path C by the air cylinder 6. Therefore, the material to be sorted slides on the conveying roller 2 due to its own weight and moves to the weight measurement site.

When the detection sensor S2 detects that the object to be sorted has moved to the weight measurement site, the control circuit section H takes in the measured value of the load cell 5 and determines the weight of the object to be sorted.

Here, the control circuit section H determines to which type the current material to be sorted belongs to from the reference weight value for each type of material to be sorted, and also determines whether the material to be sorted is within the allowable range of the reference weight value. It is determined whether the amount exceeds, or is less than, and determines whether the material to be sorted is a proper material, a correctable material, or a non-correctable material.

When this determination is completed, the pre-weight measurement process is completed, and the stopper 7 is lowered to move the object to be sorted. Here, if the object to be sorted is determined to be an uncorrectable object based on the above determination, the control circuit section H operates the uncorrectable object ejector E to discharge the object. Move the uncorrectable material ejector E further without activating it. Here, if the object to be sorted is a correctable object, the control circuit section H drives the presser plate 10 and the guide plate 12 by the corresponding air cylinders 9-11 based on the detection by the detection sensor S for detecting the correction position. The object to be sorted is fixed at a predetermined position, and then the weight compensator F is operated to drill a hole in the object to be sorted.

By this perforation, a part of the material to be sorted is removed, and the weight of the material to be sorted is reduced accordingly. When this drilling is completed, the holding plate 10 and the id 12 are released from fixing the material to be sorted, and the weight correction process is completed.

In addition, if the material to be sorted is determined to be suitable in the pre-weighing process,
This weight correction process is omitted.

Next, when the control circuit H detects with a detection sensor S such as a charging switch that the object to be sorted that has passed through the weight correction process has moved above the load cell 13, the stopper 15 is conveyed by the air cylinder 14. The object to be sorted is projected onto the path C and stopped on the transport path C above the load cell 13, and the load cell 13 measures the weight.

Then, the control circuit section H compares the reference weight value of the product and the measured Wf value and determines whether the measured value is acceptable. If it is within the range, it is determined to be appropriate, and if it is not within the allowable range, it is determined to be defective. The process from this weight measurement to the determination of pass/fail is the post-weighing process. The subsequent weighing process is omitted if the material to be sorted is determined to be suitable in the pre-weighing process.

When the post-weighing process is completed, or when the selected χHID determined to be a suitable item in the pre-weighing process begins to move, the control circuit section H moves the stopper 15 downward using the air cylinder 14 to shake the object to be sorted. portion is moved to stacking device B.

Here, the control circuit section H rotates the plate 16 about the shaft 16a by means of an air cylinder 23 to sort out the objects to be sorted based on the type of the objects to be sorted and the determination of pass/fail. In the tJ1 diagram (,), the I side and the ni side are the lines for stacking appropriate materials to be sorted, and two types of materials to be sorted χσ
By sorting out the materials, you can stack them on top of each other. The hole J in the center is a hole for collecting objects to be sorted that are determined to be defective in the post-separation process.

Then, when the detection sensor s5 or s6 detects that the material to be sorted, which is the appropriate material divided into lines by the plate 16, has arrived at the predetermined discharge position, the control circuit section H
17a or 17b is opened for a certain period of time and the receiver is the plate 18a.
Alternatively, the material to be sorted is discharged and loaded onto 18b. Here, the upper limit position of the tray 18a or 18bf)'I6 is detected by an upper limit detection sensor S or s8, and the lower limit position is detected by a lower limit detection sensor S.

Or it is detected by 810, and the distribution is further carried out by stacking device B.
The detection sensor S or 8 determines whether the discharge state is full or not.
If the container is not full, the receiver raises the tray 18a or 18b to the upper limit position and prepares for discharge, and as described above, the tray 17a or 17b is filled with the material to be sorted. When loaded, the receiver lowers the tray 18a or 18b and stops the lowering when the output of the upper limit detection sensor S7 or s8 disappears. In this way, a predetermined number of selected objects are stacked to form a lower limit detection sensor s9 or S.

0 is turned on and the one-hi limit detection sensor S or s8 is turned off, the lowering of the receiver MfL18tr or 18[1 is stopped and the motor M is driven to sort the objects to be sorted by the conveyor 19 and stack the stacking device B. Move it to the unloading end.

At the same time, if the tray is not fully loaded, the tray 18a or 18b will be loaded with a self-zeroing system.
20a or 20b to the highest level, then prepare for stacking the objects to be sorted, and restart the operations of each of the above steps.

[Effect of the invention 1] Since the present invention is configured as described above, it is possible to automatically determine the quality of the objects to be sorted and to correct the weight.Furthermore, since this is not done manually, there is less variation in weight correction, and weight accuracy is improved. This has the effect of improving performance and also saving labor.

[Brief explanation of the drawing]

FIGS. 1(a), (b), and (c) are a top view, a side view, and a front view of an apparatus according to an embodiment of the present invention. @ Figure 2 is a circuit summary diagram of the same as above, and Figure 3 is a 70- chart for explaining the operation of the same. A... Weight sorting correction device, B... Stacking device for sorting, D... Objects to be sorted, E... Uncorrectable material discharger, F
...It is a weight corrector. Agent Patent Attorney Ishi 1) Technique 7 Procedure Amendment (Voluntary) May 2, 1986

Claims (1)

[Claims] (1) Determine the type of the material to be sorted based on the standard weight set in advance for each product type, and classify the material that falls within the permissible weight range of the standard weight into proper material, and the material that exceeds the permissible weight range as appropriate material. a pre-weighing step in which objects to be sorted that are lighter than the allowable weight range are determined to be objects that cannot be corrected; a discharge step to discharge objects to be sorted that are determined to be objects that cannot be corrected in the pre-weighing process; A weight correction process in which the weight of the objects to be sorted is corrected by excluding a part of the objects to be sorted that have been determined to be objects that can be corrected in the weighing process, and the weight of the objects to be sorted whose weight has been corrected in the weight correction process is within the allowable weight range of the reference weight. There is a post-weighing process that determines whether the weight is within the weight range and determines whether the items are suitable or defective, and the items that have been determined to have an appropriate weight in the pre-weighing process are sorted by type, and in the post-weighing process, they are classified as defective items. A weight sorting correction system comprising at least a process of sorting the judged objects to be sorted.