JPH0483565A - Weight sorting device - Google Patents

Abstract

PURPOSE:To reduce the wasteful operation of an endless body and to extend the life of the endless body by providing a control part detecting that a detected space rate becomes a value near to 1 to change over the running speed of the endless body to standby speed. CONSTITUTION:Discharge stations 41-47 are provided along the feed route of buckets 2 in the order of wts. Objects to be sorted are placed on the buckets 2 to be fed and the wt. ranks of the discharge stations are compared with the wts. of the objects to be sorted placed on the passing buckets 2 and the objects to be sorted are discharged from the buckets at the discharge stations concerned. Further, a space rate judging part 14 detecting whether the objects to be sorted are placed on the buckets in a specific section is provided. A control part 17 detects that a detected space rate becomes a value near to 1 to change over the running speed of an endless body to standby speed. As a result, the wasteful operation of the endless body is reduced to make it possible to achieve the extension of the life of the endless body and the reduction of working noise.

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. 3, a conventional technique disclosed in Japanese Unexamined Patent Publication No. 59-713583 is provided with an endless body 1 that is rotatably driven in the vertical direction [in the direction of arrow B] with respect to an 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 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 station, such as the position of the discharge station 42 in FIG. 3, for each weight rank.

Problems to be Solved by the Invention In such a conventional configuration, the traveling speed of the endless body 1 is constant, and the operator moves the sorting object to the weighing station 3 at a speed commensurate with the traveling speed of the endless body 1. They are working to send goods.

However, this type of operation in which only the endless body 1 moves at high speed despite the slow feeding of the items to be sorted by the operator has problems such as the fact that the operation noise of the endless body 1 is loud.

SUMMARY OF THE INVENTION An object of the present invention is to provide a weight sorting device that can extend the life of the endless body and reduce operating noise during standby by reducing wasteful operation of the endless body.

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 weight of the items to be sorted placed in the passing buckets is compared with the weight of the items to be sorted, and the items to be sorted are discharged from the buckets at the corresponding discharge station, and the items to be sorted are placed in each of the buckets in a specific section. a control unit that includes a vacancy rate determination unit that detects whether or not the endless body is placed, and that detects that the detected vacancy rate has become a value close to “1” and switches the running speed of the endless body to a standby speed; It is characterized by having the following.

According to this configuration, the vacancy rate determination section detects the vacancy rate of the bucket in a specific section, and when the vacancy rate approaches "1", the control section switches the running speed of the endless body to a slow standby speed.

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 and 2. Components having the same functions as those in FIG. 3 showing the conventional example will be described with the same reference numerals.

1 and 2 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 outward 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, on the outgoing path 5 of the endless body 1, a discharge station 4. 44 are arranged, and the return path 6 is an ejection stage. 45 to 47 are arranged. 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 containing a 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 carried out without placing any products to be sorted 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 as follows. It is written to the first memory of the radio response tag T attached to its own bucket 2 via the read/write device 8 . During subsequent operation, the total weight value G obtained from the weighing machine 7 at that time is corrected using the tare weight value Gt read from the first memory of the wireless response tag T attached to the own bucket 2. Net weight value G of the product to be sorted. Calculate,
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 items to be sorted placed thereon from the second memory of the wireless response tag T attached to the arriving bucket 2. and each discharge station 41
~47 comparators C1 to C7.

As shown in FIG. 1, each of the comparators Cl-07 is assigned a weight rank as a reference value from the weight rank management section 11 of the control section IO. Here, immediately after the start of operation, weight ranks 71 to Z7 are given as shown in Table 1 below.

[Margin below]

[Table 1] Here, 71 to Z7 are given in the order of weight from smallest to largest: Z, Z2, Z3, Z4, Z5, Z6, Z7. The discharge triggers Q1 to Q7 provided in the discharge stations 4□ to 47 are connected to the respective comparators C□ to C7.
is operated based on the output of

Specifically, the comparator C8 receives the net weight value G read out by the reading device 9. and the weight rank Z set from the control unit IO, and if Go≦ZIH, the discharge trigger Q1 is activated, and the bucket 2 located at the discharge station 41 is tilted and placed on it. The items to be sorted are discharged into the container +3°. The driving of the ejection trigger Q is immediately released after the tilting of the kerato 2 to prepare for the subsequent kerato 2. The same applies to the driving of the ejection triggers Q2 to Q7. Here, ZIH is the weight rank Z1. is the upper limit of

Similarly, the comparator C2 receives the net weight value G read out by the reading device 9. and the weight rank Z2 set from the control unit IO.
When Z 2L < G o :ia Z 21, the discharge trigger Q2 is activated, the bucket 2 located at the discharge station 4□ is tilted, and the items to be sorted are discharged into the container 13□. Ru. Z2L is the lower limit of weight rank Z2 (=Z1
H), Z2) l is the upper limit of weight rank Z2.

The same applies to the comparators C3 to C7 of weight ranks 73 to z7.

In FIGS. 1 and 2, the discharge trigger Q2. Q7 is driven, and the nokkerato 2 that has arrived at the discharge stations 42 and 47 is tilted b).

The contents written to the second memory of each wireless response tag T via the read/write device 8 are sent to the vacancy rate determination unit I4 each time.
The data is sent to the register 15 and stored therein.

This register 15 stores the net weight value G of a plurality of 'N'' items to be sorted, and when a specified number of data is accumulated, the contents are updated on a first-in, first-out basis.Vacancy rate determination section 14 The determination unit 16 determines whether each net weight value G in the register 15 exceeds a specified weight value near "zero" of the weighed value, and determines whether the number of buckets 2 below the specified weight value is " In the case of "n", the actual vacancy rate Es is calculated from the calculation of n/N, and if the actual vacancy rate Es exceeds the set vacancy rate ER near "1", the control unit 17 The drive motor 18 of the endless body 1 is controlled to set the standby speed slower than the normal operating speed.During the weight sorting operation, the actual empty rate Es falls below the set empty rate ER near "1". In this case, the vacancy rate determination unit 14 instructs the control unit 17 to increase the rotation speed of the drive motor 18.

In this way, when the vacancy rate Es is large, the running speed of the endless body 1 is automatically switched to a slow state, so the operating noise of the endless body 1 can be reduced, and wasteful high-speed operation is eliminated, making the endless Wear of the mechanical parts of the shaped body 1 is reduced, and the life of the endless shaped body 1 can be extended.

Effects of the Invention As described above, according to the present invention, there is provided a vacancy rate determination unit that detects whether or not items to be sorted are placed in each of the buckets in a specific section, and when the detected vacancy rate is "1". Since a control unit is provided that detects that the speed is close to that of the endless body and switches the running speed of the endless body to a standby speed, the running speed of the endless body can be automatically switched to a slow state when the empty rate is large. Therefore, the operating noise of the endless body can be reduced, unnecessary high-speed operation is eliminated, wear of the mechanical parts of the endless body is reduced, and the life of the endless body can be extended.

[Brief explanation of the drawing]

FIG. 1 is a plan view and electrical circuit diagram of the main parts of an embodiment of the weight sorting device of the present invention, and FIG. 2 is a front view of the same weight sorting device.
FIG. 3 is a front view of a conventional weight sorting device. 1... Endless body, 2... Bucket, 41-47...
- Discharge station, 7... Weighing machine, Deceased... Reading/writing device, 13, to 137... Container, 14... Empty rate determination section, 15... Register, 16... Determination section, 18.
...A drive motor for an endless body.

Claims (1)

[Claims] 1. Discharge stations are provided in the order of weight rank along the transport route of the bucket, and the products to be sorted are placed on the buckets and transported, and the products to be sorted placed in the weight ranks of the discharge stations and the passing buckets are an vacancy rate determination unit configured to compare the weights of the items and discharge the items to be sorted from the buckets at the corresponding discharge station, and to detect whether or not the items to be sorted are placed in each of the buckets in the specific section; A weight sorting device comprising: a controller configured to detect when the detected empty rate becomes a value close to "1" and switch the running speed of the endless body to a standby speed.