JPH0448225A - Weight selector - Google Patents

Abstract

PURPOSE:To improve the reliability more than before even against a power failure, noise, etc., by providing a writing means which writes the weighed value of a weighing means 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:The weighed value of the weighting means 7 is written by the writing means 8 in the radio answer tag T fitted to each bucket 2 on its movement side and conveyance is performed toward discharge stations 410 - 440 and 411 - 441 integrally with respective buckets 2; and reading means 20 read the contents of arriving radio answer tags T on the side of the buckets 2 at the positions of the discharge stations 410 - 440 and 411 - 441 and a compar ing means 22 compares the weight set value of a weight rank with the contents read out of the radio answer tag T to decide whether or not the bucket 2 needs to be slanted, so that object articles to be selected are discharged from buckets at the discharge stations 410 - 440 and 411 - 441 in corresponding weight ranks.

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 a body 1, and items to be sorted that have been weighed at a weighing station 3 placed outside the endless weight system are sequentially put into the buckets 2, and are placed on the buckets 2 and sent to discharge stations 41 to 41. 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 of the corresponding weight rank, bucket 2 is tilted. It is configured to discharge the products to be sorted at the position of the corresponding discharge stage tongue, for example, the position of discharge station 4□ 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 each discharge station 4. ~4N, the weight value of the item to be sorted placed in the bucket 2 that has arrived at its stage 2 position is read out from the shift register SR and compared with the weight rank for which it is in charge.

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, if an erroneous shift occurs due to the influence of noise, the comparison results at all discharge stages Pn 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 radio response tag attached to the moving side of each bucket, a writing means for writing the weight value of the weighing means on the radio response tag, and transporting the endless object. A reading means for reading out the contents from the wireless response tag on the arriving bucket side, which is arranged at each discharge station position arranged on the route; The present invention is characterized in that it is provided with a comparison means for tilting and discharging the items to be sorted.

According to this configuration, the weight value of the weighing means is written by the writing means to the wireless response tag attached to the moving side for each bucket, and the bucket is transported together with each bucket toward the discharge station. . At each discharge station position, the reading means reads the contents from the wireless response tag on the arriving bucket side. The comparison means compares the weight setting value of the weight rank with the content read from the wireless response tag to determine whether or not to tilt the bucket.
The products to be sorted are discharged from the bucket at the discharge station of the corresponding weight rank.

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
Along the conveying direction C there is a discharge station 'lio~4.
40 is arranged, and on the return route 6 there are discharge stations 4□1~
44□ are arranged. Outward route 5 discharge stage Pn4
A weighing machine 7 is installed on the upper side of io to 4ao.

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 for writing a weight value to the wireless response tag T attached to the bucket 2 being weighed. The wireless response tag T and the writing device 8 are constructed as shown in FIG.

The weight value of the weighing machine 7 is read into the data setting section 9 of the writing device 8. First, the antenna lO of the writing device 8 and the antenna 11 of the wireless response tag T are electromagnetically coupled by the electromagnetic wave 12,
A carrier signal 15 is supplied from the oscillation circuit 13 of the writing device 8 to the rectifier circuit 14 of the wireless response tag T. Rectifier circuit 14
In this case, the carrier signal 15 is rectified and smoothed to supply the entire power of the internal circuit of the radio response tag T. Data storage section of wireless response tag T! 6 and the input/output circuit 17 are supplied with power. The writing device 8 writes the carrier signal 15 together with the code of the rewriting command and the contents read into the data setting unit 9 in FSK format.
The signal is modulated and applied to the antenna 10. On the wireless response tag T side, when the input/output circuit 17 demodulates the signal and detects the rewrite command code, the contents of the data storage section 16 are updated to the weight value transmitted together with the code.

It should be noted that the data storage section 16 of this embodiment has a first E to which the weight value is written from the writing device 8 as described above.
An EP-ROM and a second EEP-ROM are provided in which the tare weight of the bucket 2 to which its own radio response tag T is attached is written in advance. Immediately after the start of operation, the operation is performed without placing any products to be sorted in any of the buckets 2, and the weight value of each bucket 2 at that time on the weighing machine 7 is written to each bucket by the writing device 8. 2, and is configured so that writing to the second EEP-ROM is not performed during subsequent operation. In the following explanation, the contents of the first EEP-ROM will be expressed as the total weight G1 and the second EEP-ROM.
17) The weight value of the EEP-ROM will be explained as a tare weight value Gt.

The discharge stations 4□0-4401 411-441 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 16 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 19 is supplied to the input/output circuit 17. and the input/output circuit 17 connects the first . The weight values written in each of the second EEP-ROMs are read out, and for "1" in the multi-digit code representing the weight value, the frequency f of the carrier signal 15 is
A signal with a frequency f, (=fQ/N,) different from 0 is applied to the antenna 11, and for code "0", a signal with a frequency f2
(=fO/N2) is applied to the antenna 11. The frequencies f, , f2 are generated by dividing the reference clock signal by a frequency dividing circuit inside the input/output circuit I7.

The data representing the two weight values read out from the data storage section 16 in this manner is transmitted by FSK modulation and induced into the antenna 12 of the reading device 20. The frequencies f, , f2 induced in the antenna I2 are determined by the demodulation circuit 21 of the reading device 20.
At the same time, the demodulation circuit 21 outputs a net weight value G0 obtained by correcting the gross weight value G read from the radio response tag T with the tare weight value Gt read from the same radio response tag T.

Net weight value G output from each reading device 20.

is input to the comparator C8 that constitutes the comparison means 22.

Ejection stage 410-44o, 4□, ~44. Ejection trigger Q 1O-Q401 Q tI=
Q41 is the net weighing value output from each reading device 20 and each discharge stage gin 41o~44°, 4□I~
It is operated as follows based on the weight rank set for each 44I.

A comparator C8 provided at each discharge station calculates the net weight value G of the items to be sorted. and each discharge station 4□. ~440+4+t~44, weight rank W, which is the set weight for every ~440+4+t~44, is compared, and a discharge trigger Q is triggered when a bucket carrying a product to be sorted that matches the weight rank arrives at its own discharge station. 10”Q
401 Drive Q11 to Q41 to tilt the bucket and discharge the items to be sorted at an appropriate discharge station.

In these figures 1 and 2, the discharge trigger Q 20+ Q, l
l+ is driven, at which time the discharge station 42
The bucket arriving at 0+431 is tilting.

In this way, data is transferred by writing the weight value to the radio response tag T that moves with the bucket 2, so there is no need for a conventional shift register SR, and it is more reliable against electrical noise than before. will improve. 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.

In addition, when data is moved using a shift register SR as in the conventional case, a discharge station 4 is used. ~44o
, 4□□ to 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 , discharge stations 410 to 44o, 4□1 to 44□ are set at arbitrary positions each time, and the reading device 20 is placed at the position of each discharge stage e. It can be easily realized by simply doing the following, and it 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.

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 weighing means for measuring the weight, a wireless response tag attached to the moving side for each bucket, a writing means for writing the weight value of the weighing means to the radio response tag, and a writing means for writing the weight value of the weighing means to the radio response tag; A reading means for reading the contents from the wireless response tag on the arrived bucket side, which is arranged at each discharging station position, and a weight setting value and the contents read from the wireless response tag by the reading means are compared, and the bucket is tilted. Since the weight value is written on the wireless response tag that moves with the bucket side and the data is transferred, there is no need for a conventional shift register, and there is no need for power outages or noise. The reliability is improved compared to the conventional method.

In addition, it can be discharged to any location each time on site; (Taylor 1
It is easy to use and allows you to set the settings.

[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...Radio response tag, 1...Endless body, 2...)
Kukerato, 4+o~4401 4+t~4 a r-discharge station, 7... Weighing machine, 8... Writing device [
writing means], 20...reading device [reading means], 22.
...Comparison means, GO...net weight value.

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. A wireless response tag attached to the moving side, a writing means for writing the weighed value of the weighing means to the radio response tag, and a discharge station disposed on the transport path of the endless body when the endless body arrives. reading means for reading out contents from the wireless response tag on the bucket side; and comparison means for comparing the weight setting value with the contents read from the wireless response tag by the reading means and tilting the bucket to eject the items to be sorted. A weight sorting device equipped with