JPH0448224A - Weight selector - Google Patents

Abstract

PURPOSE:To improve the reliability to a power failure, noise, etc., by providing a writing means which writes a weight rack in a radio answer tag, a reading means which reads the contents of the radio answer tag, and a comparing means which slants a bucket and discharges an object article to be selected. CONSTITUTION:Set weight ranges at respective positions of discharge stations 410 - 440, and 411 - 441 arranged on the conveyance path of an endless body 1 are compared with the momentary weighed value of a weighing means 7 to decide one of weight ranks and the eight rank is written in the radio answer tag T by the writing means 8; and the contents of a radio answer tag T on the side of the bucket 2 which are arranged at the positions of the discharge stations 410 - 440 and 411 - 441 and reached are read out by the reading means 20 and the coincidence between the weight rank where the reading means 20 belongs and the weight rank read out of the radio answer tag T by the reading means is detected to slant the bucket 2, thereby discharging the object article to be selected by a comparing means 22.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a weighing device that weighs and automatically weights items to be sorted.

Conventional technology, such as Japanese Patent Application Laid-Open 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, as shown in FIG. A plurality of buckets 2 are attached to the endless body 1, and items to be sorted that have been weighed at a weighing station 3 disposed outside the system of the endless body 1 are sequentially put into the buckets 2, and then placed on the buckets 2 and discharged 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 when bucket 2 arrives at the discharge station with the corresponding weight rank, bucket 2 is tilted. The apparatus is configured to discharge the products to be sorted at the position of the corresponding discharge stage, for example, at the position of the discharge station 42 in FIG. 4, for each weight rank.

The weight values obtained by weighing at the weighing station 3 are sequentially written to the shift register SR, and
is shifted in synchronization with the rotational speed of the endless body 1, and at each discharge station 41 to 4N, the weight value of the product to be sorted placed in the bucket 2 that has arrived at its stage cod position is transferred to a shift register. It reads it from the SR and compares it with the weight rank that it is in charge of.

Problems to be Solved by the Invention In such a conventional configuration, a shift register SR is required to handle the weight values of the items to be sorted.

When the shift register SR is used in this way, there is a problem in that reliability against electrical disturbances decreases.

Specifically, when an erroneous shift occurs due to the influence of noise, the comparison results at all the discharge stations 41 to 4N become unreliable, and the reliability of sorting is significantly impaired. Additionally, if a power outage occurs, operation cannot continue even if power is restored.

SUMMARY OF THE INVENTION An object of the present invention is to provide a weight sorting device that is more reliable against electrical disturbances than conventional ones.

Means for Solving the Problems The weight sorting device of the present invention comprises an endless body that is rotatably driven and has a plurality of buckets attached at predetermined intervals on which articles to be sorted are placed, and articles to be sorted placed in each bucket. a weighing means for measuring the weight of the bucket, a wireless response tag attached to the moving side of each bucket, and a set weight range and weighing means for each discharge stage zero position arranged on the transport path of the endless body. a writing means for comparing the weight values from time to time to determine which weight rank it belongs to and writing the U rank to which it belongs to the wireless response tag; A reading means for reading contents from the wireless response tag on the side of the arrived bucket, and detecting a match between the weight rank to which the reading means belongs and the weight rank read from the wireless response tag by the reading means, and tilting the bucket. The present invention is characterized by providing a comparison means for discharging the products to be sorted.

Effect: According to this configuration, the weight rank of each product to be sorted is determined based on the weight value of the weighing means and the set weight range for each discharge station, and the writing means writes the weight rank to the moving side for each bucket. It is written to an attached radio-responsive tag and transported along with each bucket toward an ejection station. At each discharge stage position, the reading means reads out the weight rank of each item to be sorted from the wireless response tag on the arriving bucket side. The comparison means compares the weight rank of each ejection station run with the weight rank read by the reading means,
When the items to be sorted in the weight rank for which the operator is responsible arrive, the bucket is tilted to discharge the items to be sorted.

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 to 3. Components having the same functions as those in FIG. 4 showing the conventional example will be described with the same reference numerals.

The weight sorting device of the present invention, as shown in FIGS. 1 and 2,
The endless body 1 is arranged to rotate horizontally with respect to the installation location A, and the outward path 5 and the backward path 6 are in the same plane. A plurality of buckets 2 on which items to be sorted are placed are attached to the endless body 1 at predetermined intervals. Here, the outward path 5 of the endless body 1
There are discharge station runs 410 to 44 along the conveyance direction C.
0 is arranged, and discharge stations 411 to 4 are arranged on the return route 6.
41 are arranged. Outward route 5 discharge station 4□
A weighing machine 7 is installed on the upper side of 0 to 440.

The weighing machine 7 measures the load of the passing bucket.

Here, a radio response tag T is attached to each bucket 2. A writing device 8 is attached near the weighing machine 7 to write a weight rank based on the weight value to the radio response tag T attached to the bucket 2 being weighed. The wireless response tag T and the writing device 8 are arranged horizontally as shown in FIG.

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

Here, a tare amount for each bucket 2 is set in the writing device 8, and the bucket 2 that has arrived at the position of the weighing machine 7 is identified, the tare amount of each is read out, and the tare weight is written to the weighing machine 7 using this tare amount. The net weight value of the item to be sorted is calculated by correcting the weight value. and discharge station 4□0~4401
Compare the set weight range predetermined for each of 411 to 441 with the net weight value of the item to be sorted, determine which discharge station weight rank the item to be sorted belongs to, and calculate the weight of the determination result. Write the rank into the data setting section 9. When the antenna 10 of the writing device 8 and the antenna 11 of the wireless response tag T are electromagnetically coupled by the electromagnetic wave 12, the writing device 8
A carrier signal 15 is supplied from the oscillation circuit 13 of the radio response tag T to the rectifier circuit I4 of the radio response tag T. The rectifier circuit 14 rectifies and smoothes the carrier signal 15 to supply the entire power of the internal circuit of the radio response tag T. Data storage section 1 of wireless response tag T
6 and the input/output circuit 17 are supplied with power. The writing device 8 applies FSK modulation to the carrier signal 15, the code of the rewriting command, and the contents read into the data setting unit 9, and applies the modulated data to the antenna IO. On the wireless response tag T side, when the input/output circuit 17 demodulates the signal and detects the code of the rewriting command, the contents of the data storage section 16 are updated to the weight rank transmitted together with the code.

The discharge stations 4so to 4401 and 411 to 441 are each provided with a reading device 20 for the radio response tag T. The reading device 20 operates in the same manner as the oscillation circuit 13 and antenna 12 of the writing device 8, and the carrier signal 14 is supplied from the reading device 20 to the rectifier circuit 14 of the wireless response tag T, so that the entire power of the internal circuit of the wireless response tag T is absorbed. I'm paying for it. Power is supplied to the data storage section 18 and input/output circuit 17 of the wireless response tag T, and a reference clock signal generated by frequency-dividing the carrier signal 14 by the reference clock generation circuit 1B is supplied to the input/output circuit I7. Then, the input/output circuit 17 reads out the respective weight ranks written in the data storage section 16, and uses the frequency f of the carrier signal 15 for "1" in the multi-digit code representing the weight rank. Frequency f different from
□ Apply a signal of (=fO/N,) to the antenna 11,
For code “0”, frequency r2 (=ro /Ng
) is applied to the antenna 11. Frequency f,,f
Reference numeral 2 denotes a frequency dividing circuit inside the input/output circuit 17, which is generated by dividing the frequency of the reference clock signal.

The data representing the weight rank read from the data storage unit 16 in this manner is transmitted by FSK modulation and induced to the antenna 12 of the reading device 20. The frequencies ft and f2 induced in the antenna 12 are the readout device f! 20 demodulation circuits 21
The signal is demodulated and input to the comparator C8 forming the comparing means 22.

Discharge station 410~44o, 4□1~441
Ejection trigger Q IO" Q401 Q I
I to Q41 are the weight ranks output from the respective reading devices 20 and the dates of each discharge stage 410 to 4401 4
It is operated as follows based on the weight rank determined by the set weight range from +t to 44.

The comparator C8 provided at each discharge station compares the weight rank Rn of the item to be sorted and the weight rank Rn of each discharge station 4□. ~4401 The weight ranks RIo'' R401Rs□~R41 for each 411~44□ were compared, and the bucket containing the items to be sorted that matched the weight ranks RIo~R401Rr 1~R41 arrived at its own discharge station. Sometimes the discharge trigger QIO~Q401
The Q II-Q 41 is driven to tilt the bucket and discharge the items to be sorted at a suitable discharge station.

In these figures 1 and 2, the discharge trigger Q 201 Q 3
I is driven, at which time the discharge station 420
The bucket arriving at +431 is tilting.

In this way, the weight rank of each item to be sorted is written on the wireless response tag T that moves with the bucket 2 and the data is transferred, so there is no need for a shift register SR as in the past, and it is effective against electrical noise. Reliability is improved compared to before. Further, even if a power outage occurs, the data in the wireless response tag T will not be lost, so the operation can be continued as is when the power is restored.

Further, when data is moved by a shift register SR as in the conventional case, an ejection stage U4. ~44o
, 4□, ~441 requires modification of the peripheral circuit of the shift register SR, which is difficult to realize. When data is transferred by writing a weight value to the machine, it is easy to set the discharge stations 410 to 44ot4sx to 441 at arbitrary positions each time, and place the reading device 20 at the position of each discharge stage. It can be realized and is easy to use.

In the above embodiment, the coupling between the wireless response tag T, the writing device 8, and the reading device 20 was realized through the intervening electromagnetic waves 12, but it is also possible to use light, which is a type of electromagnetic waves, especially infrared light. It can also be achieved.

In the above embodiment, the radio response tag T was described as being attached to the bucket 2, but it may also be attached to the endless body 1.

In the above embodiment, the writing device 8 is located near the weighing machine 7.
The tare amount of each bucket 2 was set on the writing device 8 side.
The tare weight of the own bucket 2 is written in the wireless response tag T attached to the wireless response tag T, and when writing to the wireless response tag T, the writing device 8 writes the tare weight from the wireless response tag T to which writing is to be performed. The same effect can be obtained by reading out the tare weight, correcting the weight value of the weighing machine 7 using the read tare weight, and determining which weight rank the net weight value obtained by this correction falls into.

Effects of the Invention As described above, according to the present invention, there is provided an endless body in which a plurality of buckets are attached at predetermined intervals while being rotationally driven and on which items to be sorted are placed, and the weight of the items to be sorted placed on each bucket. a wireless response tag attached to the moving side of each bucket; and a set weight range for each discharge station position disposed on the conveyance path of the endless object, and occasional measurement of the weighing means. writing means for comparing the weight values to determine which weight rank it belongs to and writing the belonging multilayer rank in the wireless response tag; A comparison between a reading means for reading contents from a response tag, and detecting a match between a weight rank to which the reading means belongs and a weight rank read from a wireless response tag by the reading means, and tilting the bucket to discharge the items to be sorted. Since the weight rank of each item to be sorted is written on the wireless response tag that moves with the bucket side and the data is transferred, there is no need for a shift register like in the past, making it more resistant to power outages and noise. The reliability is improved compared to the conventional method.

In addition, the discharge station can be set at any location on-site, making it easy to use.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the weighing device of the present invention, Fig. 2 is a front view of the same device, Fig. 3 is a configuration diagram of a wireless response tag, reading device, and writing device, and Fig. 4 is a conventional weighing device. 1 is a schematic configuration diagram of a weight sorting device. T... Wireless response tag, 1... Endless body, 2... Bucket), 4+o~440r 411~44. ... Discharge station, 7... Weighing machine, 8... Writing device [
writing means], 20...reading device [reading means], 22.
...A means of comparison.

Claims (1)

[Claims] 1. An endless body that is rotationally driven and has a plurality of buckets on which items to be sorted are placed at predetermined intervals, a weighing means for measuring the weight of the items to be sorted placed on each bucket, and a weighing means for each of the buckets. The wireless response tag attached to the moving side is compared with the set weight range for each position of the discharge station arranged on the conveyance path of the endless object and the occasional weight value of the weighing means to determine which weight rank it is. a writing means for determining whether the tag belongs to the radio response tag and writing the weight rank to the radio response tag; a reading means for reading the content from the radio response tag on the arriving bucket side, which is disposed at each of the discharge station positions; A weight sorting device comprising comparison means for detecting a match between the weight rank to which the reading means belongs and the weight rank read from the wireless response tag by the reading means and tilting the bucket to discharge the items to be sorted.