JPH0481622A - Sorting apparatus of weight - Google Patents

Abstract

PURPOSE:To determine automatically whether a weighed value is inside the range of an allowable error or outside it, by providing a vessel storing an article to be sorted, for each discharge station, and by providing a weigher measuring the net weight of each vessel. CONSTITUTION:A construction is made so that a weight rank Z of a discharge station and the weight of an article to be sorted which is loaded in a passing bucket 2 are compared with each other and that the article is discharged from the bucket 2 at the pertinent discharge station 4. A vessel 13 storing the article to be sorted is provided for each discharge station 4, a weigher 7 measuring the net weight of each vessel 13 is provided, and a control element 15 which detects the occurrence of any state shown by the formulas wherein a net weight value outputted by the weigher 7 when the number of pieces of the article to be sorted which is discharged to a specified discharge station reaches a preset number N of pieces is denoted by GN, the upper limit value of a weight rank which the specified discharge station takes charge of by ZH, the lower limit value thereof by ZL and an allowable error weight by DELTAn, and informs a faulty result of sorting, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a weight sorting device for sorting according to weight values.

As shown in FIG. 4, the conventional technique disclosed in Japanese Unexamined Patent Publication No. 59-7G583 is provided with an endless body 1 that is rotatably driven in the vertical direction [in the direction of arrow B] with respect to the installation location A. A plurality of buckets 2 are attached to a weighing station 3 arranged outside the system of the endless body 1, and the weighed products to be sorted are sequentially put into the buckets 2, and then placed on the buckets 2 and transferred to a discharge station 4. ~ When passing through 4N, the weight value of each item to be sorted is compared with the weight rank of its discharge station, and bucket 2 is placed at the discharge station of the corresponding weight rank.
When the product arrives, the bucket 2 is tilted to discharge the products to be sorted at the corresponding discharge station position, for example, at the discharge station 4° in FIG. 4, for each weight rank. .

Problems to be Solved by the Invention In such a conventional configuration, although the products to be sorted are sorted by weight rank, there is no means to confirm whether or not the sorting has been achieved in the set weight rank without any sorting mistakes. Not provided.

An object of the present invention is to provide a weight sorting device that can confirm whether the sorting results are correct.

Means for Solving the Problems The weight sorting device of the present invention includes discharging stations arranged in the order of weight rank along the conveyance route of the bucket, and articles to be sorted are placed on the buckets and conveyed, and the weight rank of the discharging station is determined according to the weight rank. The container is configured to compare the weight of the products to be sorted placed in the passing bucket and discharge the products to be sorted from the bucket at the corresponding discharge station, and to store the products to be sorted at each discharge station. A weighing machine is provided to measure the net weight of each container, and when the number of products to be sorted delivered to a specific discharge station reaches a preset number "Npa", the net weight value outputted by the weighing machine is If "GNN" is the upper limit of the weight rank in charge of that particular discharge station as "°12H" and the lower limit is "ZL% tolerance weight Δn", then "ZL - N - Δn">GN "ZH"N+Δn" The present invention is characterized in that it includes a control section that detects the occurrence of any of the states <GN and notifies a defective screening result.

According to this configuration, the items to be sorted discharged to a specific discharge station are received in a container, and the net weight of the items to be sorted put into this container is measured by a weighing machine. The control unit determines whether the sorting result is within the allowable error weight based on the number of items to be sorted delivered to a specific discharge station or the weight value of the weighing machine when the preset number "I N 1'" is reached. judge whether

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3. Components having the same functions as those shown in FIGS. 4 and 5 showing the conventional example will be described with the same reference numerals.

FIGS. 2 and 3 show the weight sorting device of the present invention, in which the endless body 1 is arranged to rotate horizontally with respect to the installation location A, and the forward path 5 and return path 6 are in the same plane. Endless body 1
A plurality of buckets 2 on which items to be sorted are placed are attached at predetermined intervals.

Here, discharge stations 41 to 44 are arranged along the conveyance direction C on the outward path 5 of the endless body 1, and discharge stations 45 to 47 are arranged on the return path 6. A weighing machine 7 is installed on the upper side of the discharge stations 41 to 44 on the outgoing route 5. The weighing machine 7 measures the load of the passing bucket.

Each bucket 2 has a first . A radio response tag T with a built-in second memory is attached. A read/write device 8 is attached near the weighing machine 7 for reading and writing to the radio response tag T attached to the bucket 2 being weighed.

The weight value of the weighing machine 7 is input to the reading/writing device 8 .

Immediately after the start of operation, the operation is performed without any products to be sorted placed in any of the buckets 2, and the weight value (tare weight value Gt) of each bucket 2 at that time on the weighing machine 7 is read and written. It is written via the device 8 into the first memory of the radio responsive tag T attached to its own bucket 2. During subsequent operation, the tare weight value G1 read from the first memory of the wireless response tag T attached to the own bucket 2 is used to determine the total weight value G obtained from the weighing machine 7 at that time.
is corrected to determine the net weight value G of the items to be sorted. Calculate the net weight value G. is written to the second memory of the radio responsive tag T attached to its own bucket 2 via the read/write device 8.

The discharge stations 41 to 47 are each provided with a wireless response tag T reading device 9. Each reading device 9 reads the net weight value G of the item to be sorted placed in the second memory of the wireless response tag T attached to the arriving bucket 2. and each discharge station 41
-47 comparators 01-C7.

Comparators C3 to C7 are given weight ranks Z and Z7, respectively, as reference values. Here, the weights are given in the order of Z1, Z2, Z3, Z4, Z5, Z6, and Z7 from the smallest weight to the largest weight.

Ejection trigger Q provided at ejection stations 41 to 4□
, ~Q7 are operated based on the outputs of the respective comparators 01~C7.

Specifically, the comparator C receives the net weight value G read out by the reading device 9. is compared with the weight rank Z1 set by the control unit 10, and if Go≦ZIH, the discharge trigger Q1 is activated and the discharge station 4. The bucket 2 located at is tilted, and the items to be sorted placed thereon are discharged into the container 131. The driving of the discharge trigger Q1 is immediately released after the bucket 2 is tilted to prepare for the subsequent bucket 2. Ejection trigger Q2
The same applies to the driving of Q7. In addition, here ZI
H is the upper limit of weight rank Z1.

Similarly, the comparator C2 receives the net weight value G read out by the reading device 9. and the weight rank Z2 set by the control unit 10.
Comparing with Z 2L < Go ≦ 72. .

In this case, the discharge trigger Q2 is driven, the bucket 2 located at the discharge station 4° is tilted, and the items to be sorted are discharged into the container 13□. Z2L is weight rank Z2
Lower limit value ("Z IB), Z2H is weight rank Z2
is the upper limit of

The same applies to comparators 03 to C7 of weight ranks Z3 to Z7.

These figures 2 and 3 show the discharge trigger Q2. Q7 is driven, and the bucket 2 that has arrived at its discharge station 4°, 47 is tilted.

Here, the case of checking the sorting results of the discharge station 44 will be explained as an example. In this case, the container 134 is supported by the weighing machine 14 as shown in FIGS. 1 and 3, and during operation, the load of the container 134 itself is erased as a tare amount. During operation, the weight value G of the weighing machine 14
N, the number of times the discharge trigger Q4 is driven, etc. are processed by the control unit 15 as follows.

The control unit 15 controls a discharge trigger Q4 that is driven when discharging the sorted items from the discharge station 44 into the container 134.
The number of drives is counted by the number management unit 16, and when the counted value reaches the preset value N, the routine of the determination unit 17 is executed. The determination unit 17 determines the weight value G of the weighing machine 14 as follows based on the weight rank z4 assigned to the discharge station 44, which is a specific discharge station, and the allowable error weight range Δn. . The weight value GN mentioned here is the weight value after the Nth item to be sorted falls into the container I34.

The upper limit of weight rank Z4 is "ZH", the lower limit is "+ZL"
, when the allowable error weight Δn is “ZL”N−Δn”
>Gs "ZH-N+Δn"<GN. In this case, it is determined that the weighed value GN is outside the allowable error range, and the buzzer 18 is sounded to notify that the sorting result is defective.

Note that the preset value N satisfies N≦NH, where NH is the maximum number of items to be accommodated, which is determined by the capacity of the container 134 and the size of the items to be sorted.

When the buzzer 18 sounds and it is determined that the sorting result is defective, the running speed of the endless body 1 is reduced and the weight of the articles to be sorted in the container 134 is re-sorted. It turns out.

In the above embodiment, the control unit 15 judged the quality of the sorting results only for the discharge station 44, but the other discharge stations 4+, 42, 43 + 45 r
Regarding 4s t 47, the quality of the screening results can be determined in the same way.

Effects of the Invention As described above, according to the present invention, discharge stations are provided in the order of weight rank along the conveyance route of the bucket, and the articles to be sorted are placed on the bucket and conveyed, and the weight rank of the discharge station and the passage are determined. The weight of the items to be sorted placed in the buckets to be sorted is compared, and the items to be sorted are discharged from the bucket at the corresponding discharge station, and a container is provided at each discharge station to store the items to be sorted. , a weighing machine is provided to measure the net weight of each container, and when the number of products to be sorted delivered to a specific discharge station reaches a preset number "N", the net weight value output by the weighing machine is "'GN, if ZH the upper limit of the weight rank in charge of that particular discharge station',
When the lower limit is "zLn" and the allowable error weight Δn, detect the occurrence of any of the following conditions: "ZL-N-Δn">G s "zH-N+Δn"<GN and notify a defective sorting result. Since a control unit is provided, it is possible to automatically determine whether the weight value GN is within or outside the allowable error range.
It is possible to avoid a situation in which a group of products to be sorted that is considered to have a large measurement error in sorting is sent to a subsequent processing line.

[Brief explanation of the drawing]

Fig. 1 is an electrical circuit configuration diagram of a main part of an embodiment of the weight sorting device of the present invention, Figs. 2 and 3 are a plan view and a front view of the same weight sorting device, and Fig. 4 is a conventional weight sorting device. FIG. 3 is a front view of the device. 1... Endless body, 2... Bucket, 41-47...
- Discharge station, 7... Weighing machine, 13. ~137
... Container, 14... Weighing machine, 15... Control unit, 1
6... Number management unit, 17... Judgment unit, 18... Buzzer C1-C7... Comparator, QI-Q7... Ejection trigger, Z1-Z7... Weight rank.

Claims (1)

[Claims] 1. Discharge stations are provided in the order of weight rank along the conveyance route of the bucket, and the articles to be sorted are placed on the buckets and conveyed, and placed on the weight ranks of the discharge stations and the passing buckets. The weight of the items to be sorted is compared and the items to be sorted are discharged from the bucket at the corresponding discharge station, and a container for storing the items to be sorted is provided at each discharge station, and each of the containers is A weighing machine is installed to measure the net weight, and the number of items to be sorted delivered to a specific discharge station is a preset number.
The net weight value output by the weighing machine when reaching “N” is “G”.
_N”, the upper limit of the weight rank in charge of that particular discharge station is “Z_H”, the lower limit is “Z_L”, and the allowable error weight Δn, then “Z_L・N−Δn”>G_N “Z_H・N+Δn” A weight sorting device is provided with a control unit that detects the occurrence of any of the conditions “<G_N” and notifies a defective sorting result.