JPH04126576A - Weight sorting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a weight sorting device that automatically sorts articles to be sorted based on their weight.

As shown in FIG. 7, a conventional technique disclosed in Japanese Unexamined Patent Publication No. 59-78583 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 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. 7, for each weight rank. .

Problems to be Solved by the Invention In such a conventional configuration, the weighing station 3 is provided outside the system of the endless body 1, and when the products to be sorted are transferred from the weighing station 3 to the bucket 2, the sorting from the bucket 2 is carried out. This configuration was unsuitable for workplaces where high-speed weight sorting is required, as items could fall.

To provide a weight sorting device which can carry out weight sorting at high speed, and can automatically correct zero point fluctuations during operation, such as forgetting the zero reset operation of a weighing device for weighing items to be sorted. With the goal.

Means for Solving the Problems A weight sorting device according to claim 1 includes a plurality of buckets that are attached at predetermined intervals to an endless body that is rotatably driven and on which items to be sorted are placed, and a plurality of buckets that are arranged on a transport path of the endless body and each bucket A weighing device is placed on the conveyance path of the endless body to measure the weight of the items to be sorted while being transported, and a weighing device is placed on the conveyance path of the endless body to measure the respective set weight and the items to be sorted placed in the bucket passing through. a discharge station that compares the weight value and tilts the bucket to discharge the items to be sorted; and a discharge station that detects that a zero reset instruction has been input to the weighing device after the start of operation and transports the endless object. The weight sorting device according to claim 2 is characterized in that it is provided with a zero reset control section for switching the speed from slow speed operation to high speed operation, in place of the zero reset control section according to claim 1, this zero reset control section is provided. detecting the elapse of a predetermined time, switching the transport speed of the endless object from high-speed operation to low-speed operation, instructing the weighing device to zero reset, detecting the completion of zero reset, and switching the conveyance speed of the endless object from high-speed operation to slow operation; The present invention is characterized in that the conveyance speed of the apparatus is configured to be switched from slow operation to high speed operation.

According to the configuration of the first aspect of the invention, when the items to be sorted are placed in the bucket, they are weighed by the weighing device while being transported by the endless body toward the discharge station.

The conveyance speed of the endless body is managed by the zero reset control unit, and until the weighing device is instructed to zero reset, the conveyance speed of the endless body is in slow operation, and the user is not allowed to convey the endless body. It can be recognized from the speed that the zero reset has not been completed. When the zero reset is completed, the conveyance speed of the endless body is automatically switched from low speed operation to high speed operation by the zero reset control section.

According to the structure of claim 2, even during execution of high-speed weight sorting, each time the zero-reset control section detects the elapse of a specified time, the conveying speed of the endless object is switched from slow speed operation to high speed operation and the measurement is performed. Heavy equipment is automatically given a zero reset. When the zero reset control unit detects that the zero reset is completed, the conveyance speed of the endless body is automatically switched from slow operation to high speed operation.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 6. Components having the same functions as those in FIG. 7 showing the conventional example will be described with the same reference numerals.

In the weight sorting device of the present invention, as shown in FIGS. 3 and 4, the endless body 1 is arranged to rotate horizontally with respect to the installation location A, so that the outward path 5 and the backward path 6 are in the same plane. be. 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 outgoing path 5 of the endless body 1 includes discharge stations 410 to 4 along the conveying direction C.
40 are arranged, and on the return route 6 there are discharge stations 411 to 411.
44. is located. Outbound trip 5 discharge station 4
, 0 to 44o, a weighing device 7 is installed on the upper side.

The bucket 2 is attached to the endless body 1 as shown in FIG. In FIG. 5, the upper part of the fixed side 11 and the upper part of the movable side 12 are connected by a link 13a, the lower part of the fixed side 11 and the lower part of the movable side 12 are connected by a link 13b, and the rear end of the link 13a is connected to the endless body 1. The guide rail IO is extended inwardly and engaged with the back surface of the guide rail IO. A protrusion 16 is provided on the back surface of the discharge port 15 of the bucket 2. Protrusion 16
A notch 17 is formed on the discharge port 15 side. The movable side 12, which is the side of the endless body 1, has a first engagement piece on its upper part that is engaged with the notch 17 of the projection IG.
A shaft 18 is provided, and a second shaft 19 is provided as an abutment piece that restricts the bucket 2 engaged with the first shaft 18 from moving toward the inside of the endless body 1. In this case, the second shaft 19 comes into contact with the protrusion 16 to prevent the notch 17 of the attached bucket 2 from moving in the direction away from the first shirt 18. A roller 14 is attached to the lower part of the movable side 12, and when passing through the weighing device 7, it rides on the platform and lifts it upward to separate the bucket 2 and the items to be sorted placed thereon. Weighing the total weight of

Ejection station 4+o~4401 411~44- Ejection triggers 81o~84o, 8□, ~841
is the weight value of the weighing device 7 and each discharge station 410~
It is operated as follows based on the weight rank set for each 441.

The tare amount of each bucket 2 is written in the tare memory in advance. A first position detector for detecting the passage of each bucket 2 and a second position detector for detecting that a specific one of the buckets 2 has passed a position immediately before the weighing device 7 are provided. The counting contents of the counter are reset when the second position detector detects the first bucket 2□ as the specific bucket. The count content of this counter is incremented every time the bucket 2 passes, and based on the count value of this counter, the tare amount is read from the tare memory, and the weight value of the weighing device 7 is read for each bucket and soto. The net weight value is calculated by correcting the tare weight. A rotary encoder is attached directly or indirectly to the motor 20 that rotationally drives the endless body 1, and in synchronization with the conveyance of the endless body 1, it is moved to each discharge station 'lto~440, 4□, ~44□. The arrived bucket is identified, and the net weight value of the items to be sorted placed in that bucket and each discharge station 4 are recorded.
□0~44o, η1. The weight rank, which is the set weight for each ~441, is compared, and when a bucket carrying a sorted item that matches the weight rank arrives at its own discharge station, a discharge trigger is triggered 810 to 840° 8I, ~8
4. is driven to tilt the bucket and discharge the items to be sorted at a suitable discharge station.

In FIGS. 3 and 4, the ejection trigger 8□o+831 is driven, and at that time the ejection station 4□0°43
, the bucket that is arriving is tilted.

The motor 20 that drives the endless body 1 and the zero of the weighing device 7
The reset is managed by the zero reset control section 21 as shown in FIGS. 1 and 2 as follows.

When the user turns on the power switch 23 to supply power to the motor 20, weighing device 7, and other parts necessary for weight sorting, this is detected in step (a-1) of the zero reset control unit 21. . As a result, the zero reset control unit 21 instructs the motor 20 to operate at a slow speed in step [a-2). In step [a-3], step [a
-1], after the power switch 23 is turned on, it is checked whether the zero reset switch 24 is operated by the user, and until the zero reset switch 24 is operated, steps [a-1] → ] → (Repeat a-33, and the motor 20 continues to operate at a slow speed.

When the user operates the zero reset switch 24, the zero reset control unit 21 outputs a zero reset execution instruction 25 to the weighing device 7 in step (a-4), and the weighing device 7 side that detects this outputs the zero reset execution instruction 25. In this case, when the net weight value is near the zero point and this state continues for a certain period of time, the weight value at that time is stored as the zero point correction value, and the zero point correction value is stored. When the memorization of
A recess/nod completion signal 26 is output.

When the zero reset control unit 21 detects the zero reset completion signal 26 in step (a-5), the zero reset control unit 21 instructs the motor 20 to operate at high speed in step [a-6]. The user can confirm that weight sorting can be started since the endless body 1 has switched from low-speed operation to high-speed operation.

When the zero reset control unit 21 switches the motor 20 to high-speed operation in step (a-6), the zero reset control unit 21 switches the motor 20 to high-speed operation in step [a-7].
Then, a predetermined time N is entered into the internal timer of the zero reset control section 21, and incrementing of the timer time is started. In step [a-8), it is checked whether the remaining time of the timer time has reached "O".

In this manner, in step [a-11i], the state is switched to a high-speed operation state and high-speed weight sorting is started. Therefore, if the zero reset control section 21 does not detect the operation of the zero reset switch 24 in step [a-3], practical weight sorting will not be carried out. It is possible to reliably prevent weight sorting errors caused by forgetting to weigh and weighing errors.

In addition, in FIG. 1, the above-mentioned 1. The second position detector is expressed as a bucket detection unit 27, and the weight value and tare amount of the weighing device 7 and the respective sorting stations Lo to 44. The part that controls the discharge triggers 81o to 84□ based on the weight rank of is referred to as the sorting control part 28.

During the high-speed weight sorting operation, when it is detected in step (a-8) that the remaining time of the timer time has become "O",
The zero reset control unit 21 switches the motor 20 to a slow operation state in step [a-9], and then switches the motor 20 to a slow operation state in step [a-9].
At step 101, a zero reset execution instruction 25 is output to the weighing device 7. On the side of the weighing device 7 that has detected this, when it detects that the net weight value is near the zero point and that state continues for a certain period of time or more, the weight value at that time is set to the zero point. It is updated as a correction value, and the zero reset completion signal 2 is sent from the weighing device 7 to the zero reset control unit 21.
6 is output. When the zero reset control unit 21 detects the zero reset completion signal 26 in step (a-11), the zero reset control unit 21 performs step (a-12).
Instructs the motor 20 to operate at high speed, restarts high-speed weight sorting, returns to step (a-7), and repeats steps [a-93, [a-103, (a-11),
Repeat [a-12] to automatically perform zero reset.

In this way, zero reset is automatically executed at each timer interval even during operation, so it is possible to prevent weight selection mistakes due to weighing errors even if the device is operated continuously for a long period of time.

In the above embodiment, steps (a-1) to [a-11i
] After executing the zero reset forgetting prevention routine D immediately after the start of operation, steps [a-7) to [a
-12] After the start of operation, the automatic zero reset routine E is executed five times, but this only executes either the zero reset forget prevention routine D or the automatic zero reset routine E. It may be configured to do so.

In each of the above embodiments, the zero reset forgetting prevention routine D includes the zero reset switch 24 at step [a-33].
was configured to detect that the weighing device 7 was manually operated and instruct the weighing device 7 to reset to zero, but in step [a-2]
It is also possible to skip step [a-3] and automatically execute step [a-4].

Effects of the Invention As described above, according to the structure described in each claim, since a weighing device is provided in the conveyance path of the endless body that conveys the bucket on which the items to be sorted are placed, it is not necessary to transfer the items to be sorted as in the conventional case. can be eliminated, and high-speed weight sorting can be achieved.

Furthermore, the configuration of claim 1 further includes a zero reset control section that detects that a zero reset instruction is input to the weighing device after the start of operation and switches the conveyance speed of the endless body from slow operation to high speed operation. Because of this, there were zero users.
Practical weight sorting is started by giving a reset instruction, and it is possible to reliably prevent a situation where a user forgets to apply a zero reset to the weighing device and performs weight sorting, and it is possible to prevent weight sorting due to weighing errors. It is possible to prevent mistakes from occurring.

In the configuration of claim 2, the conveying speed of the endless body is switched from high-speed operation to low-speed operation by detecting the passage of a specified time, instructing the weighing device to perform zero reset, and detecting the completion of zero reset. Since a zero reset control unit is provided to switch the conveyance speed of the endless object from slow operation to high speed operation, zero reset is automatically executed at each timer time even during operation, so that continuous operation for a long period of time is possible. Even in cases where weight selection is incorrect, accurate weight selection can be expected by preventing weight selection mistakes due to measurement errors.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an electric circuit of an embodiment of the weight sorting device of the present invention, FIG. 2 is a flowchart of the zero reset control section of the device, FIG. 3 is a plan view of the device, and FIG. 4 5 is a cross-sectional view of the same device, FIG. 6 is an overall perspective view of the same device, and FIG. 7 is a configuration diagram of a conventional weight sorting device. 1... Endless body, 2... Bucket, 410-44.
, 41, ~441...discharge station, 7...
Weighing device, 810 to 84o, 8.1 to 841... Ejection trigger, 20... Motor, 21... Zero reset control section, 24... Zero reset switch.

Claims (1)

[Scope of Claims] 1. A plurality of buckets are attached at predetermined intervals to an endless body that is driven to rotate, and on which items to be sorted are placed; A weighing device that measures the weight of the items to be sorted is placed on the conveyance path of the endless body, and compares the set weight of each with the weighed value of the item to be sorted placed on the passing bucket. A discharge station that tilts a bucket to discharge the items to be sorted; and a discharge station that detects that a zero reset instruction is input to the weighing device after the start of operation, and changes the conveyance speed of the endless object from slow operation to high speed operation. A weight sorting device equipped with a zero-reset control section for switching. 2. A plurality of buckets are attached at predetermined intervals to an endless body that is driven to rotate and carry items to be sorted, and a system is placed on the transport path of the endless body to measure the weight of the items to be sorted that are placed in each bucket and are being transported. A weighing device is placed on the conveyance path of the endless object to measure the weight, and the set weight of each object is compared with the weighed value of the items to be sorted placed on the passing bucket, and the bucket is tilted for sorting. A discharge station for discharging the target product, detects the elapse of a specified time, switches the conveyance speed of the endless object from high speed operation to slow operation, instructs the weighing device to zero reset, and completes the zero reset. A weight sorting device comprising: a zero reset control section that detects and switches the conveyance speed of the endless body from slow operation to high speed operation.