JPH0818012B2 - Weight sorter - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weight sorting device for automatically sorting products to be sorted based on weight.

2. Description of the Related Art Japanese Unexamined Patent Publication No. 59-76583 discloses an endless body 1 which is rotatably driven in a vertical direction [direction of arrow B] with respect to an installation location A as shown in FIG. turn was placed in the bucket 2, the discharge station 4 ₁ is placed on the bucket 2 more buckets 2 with weighing station 3 disposed to the outside of the endless member 1 is attached to weighed sorting goods for the
When passing 4 _N , compare the weight value of each item to be sorted with the weight rank of the discharge station, and tilt the bucket 2 when the bucket 2 arrives at the discharge station of the corresponding weight rank. Te position of the discharge station in question for example in Figure 7 is configured to discharge the sorted object goods at the location of each weight categories and so the position of the discharge station 4 _2.

SUMMARY OF THE INVENTION In such a conventional configuration, the weighing station 3 is provided outside the system of the endless body 1, and the weighing station 3 is provided.
When the item to be sorted is transferred from the bucket 2 to the bucket 2
Since the items to be sorted may fall from the product, it is not suitable for a workplace that requires high-speed weight sorting.

The present invention provides a weight sorting device capable of high-speed weight sorting, yet forgetting the zero reset operation of a weighing device for weighing items to be sorted, and automatically correcting a zero point variation during operation. With the goal.

Means for Solving the Problems A weight sorting device according to claim 1 is a plurality of buckets mounted on a rotationally driven endless body at a predetermined interval to place articles to be sorted, and buckets arranged in a transport path of the endless body. A weighing device for measuring the weight of products to be sorted which are placed on the conveyor, and a total of the products to be sorted which are placed on the buckets passing through the set end weights arranged in the endless transport route. A discharge station that tilts the bucket and discharges the sorting target product by comparing the weight value with the weight value, and detects that a zero reset instruction has been input to the weighing device after the start of operation and conveys the endless body. It is characterized in that a zero-reset control unit is provided for switching the speed from a slow speed operation to a high speed operation.

According to a second aspect of the present invention, there is provided a weight sorting apparatus, wherein instead of the zero-reset control section of the first aspect, the zero-reset control section is used to detect a lapse of a specified time to change the conveying speed of the endless body from a high speed operation to a very low speed operation. The weighing device is instructed to perform a zero reset, the completion of the zero reset is detected, and the transport speed of the endless body is switched from a slow speed operation to a high speed operation.

Operation According to the structure of claim 1, when the sorting target product is placed in the bucket, it is weighed by the weighing device while being conveyed toward the discharge station by the endless body. The transport speed of the endless body is controlled by the zero-reset control unit, and the transport speed of the endless body is very slow until the zero reset is instructed to the weighing device. You can recognize from the speed that the zero reset is not completed. When the zero reset is completed, the transport speed of the endless body is automatically switched from the slow speed operation to the high speed operation by the zero reset control unit.

According to the configuration of claim 2, the transport speed of the endless body is switched from the slow speed operation to the high speed operation each time the zero reset control unit detects the passage of the specified time even during the high speed weight sorting. Heavy equipment is automatically given a zero reset. When the zero reset control unit detects that the zero reset is completed, the transport speed of the endless body is automatically switched from the slow speed operation to the high speed operation.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. It should be noted that components having the same functions as those in FIG.

In the weight sorting apparatus of the present invention, as shown in FIGS. 3 and 4, the endless body 1 is arranged so as to rotate horizontally with respect to the installation location A, and the forward path 5 and the return path 6 are in the same plane. is there.
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 forward fifth endless body 1 along the conveying direction C discharge station 4 _{10-4 40}
And the discharge stations 4 ₁₁ to 4 ₄₁ are arranged on the return path 6. A weighing device 7 is installed on the upper side of the discharge stations 4 ₁₀ to 4 _{40 on} the outward path 5.

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 movable side
The upper part of 12 is 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 extended to the inner side of the endless body 1 to the back surface of the guide rail 10. Engaged. A projection 16 is provided on the back surface of the discharge port 15 of the bucket 2. A notch 17 is formed on the protrusion 16 on the discharge port 15 side. The movable side 12 on the side of the endless body 1 is engaged with the first shaft 18 as an engaging piece with which the cutout portion 17 of the projection 16 is engaged, and the first shaft 18 at the upper portion thereof. A second shaft as an abutting piece that restricts the movement of the bucket 2 toward the inside of the endless body 1.
19 is provided, and here the second shaft 19 is a protrusion.
The notch 17 of the bucket 2 that is mounted in contact with 16 is restricted from moving in a direction away from the first shaft 18. A roller 14 is attached to the lower part of the movable side 12, and when passing through the weighing device 7, the roller 14 is mounted on the platform and lifted upward so that the bucket 2 and the sorting target article mounted on the bucket 2 are mounted. Is being weighed.

The discharge station 4 _{10-4 40,} 4 _{11-4 41} discharge trigger 8 _{10-8 40} provided on, 8 _{11-8 41} weighing device 7 of weighing values and the discharge station 4 _10-4 per ₄₁ It is operated as follows based on the weight rank set in.

The tare amount of each bucket 2 is written in the tare memory in advance. A first position detector that detects passage of each bucket 2 and a second position detector that detects that a specific one of the buckets 2 has passed a position immediately before the weighing device 7 are provided. and which resets the count contents of the counter when the second position detector detects the first-th bucket 2 ₁ as the particular bucket. The count content of this counter is incremented each time the bucket 2 passes, the tare amount is read from the tare memory based on the count value of this counter, and the tare amount of each bucket from which the weight value of the weighing device 7 is read out. The net weight value is calculated by correcting with. A motor 20 for rotating the endless body 1
A rotary encoder is directly or indirectly attached to the bucket. The bucket that has reached each of the discharge stations 4 ₁₀ to 4 ₄₀ , 4 ₁₁ to 4 ₄₁ in synchronization with the transport of the endless body 1 is identified, and the bucket is identified. The net weight value of the items to be sorted placed on the is compared with the weight rank that is the set weight for each discharge station 4 ₁₀ to 4 ₄₀ , 4 ₁₁ to 4 ₄₁ , and the sorting target that matches the weight rank is compared. Ejection trigger 8 ₁₀ ~ when the bucket loaded with goods arrives at its own ejection station
8 ₄₀ , 8 ₁₁ to 8 ₄₁ are driven, the bucket is tilted, and the products to be sorted are discharged at an appropriate discharge station. In FIGS. 3 and 4, the discharge triggers 8 ₂₀ and 8 ₃₁ are driven, and the buckets arriving at the discharge stations 4 ₂₀ and 4 ₃₁ at that time are tilted.

Zero of the motor 20 for driving the endless body 1 and the weighing device 7
The reset is managed by the zero reset controller 21 as shown in FIGS. 1 and 2 as follows.

When the user turns on the power switch 23 in order to supply electric power to the motor 20, the weighing device 7 and each part required for weight selection, this is the step [a] of the zero reset control part 21.
-1] is detected. 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], it is checked whether the zero reset switch 24 has been operated by the user after the power switch 23 was turned on in step [a-1], and until the zero reset switch 24 is operated. Step [a
-1]->[a-2]-> [a-3] is repeated, and the motor 20
The state of slow speed operation continues.

When the user operates the zero reset switch 24, a zero reset execution instruction 25 is output from the zero reset control unit 21 to the weighing device 7 in step [a-4], and the weighing device 7 that has detected this instruction is executed. When it detects that the net weight value is near the zero point and that state continues for a certain time or longer, the weight value at that time is stored as a zero point correction value and the zero point correction is performed. When the storage of the value is completed, the zero reset completion signal 26 is output from the weighing device 7 to the zero reset control unit 21. Since the endless body 1 at the time of reading the zero-point correction value is operating at a very slow speed, which is sufficiently slower than the high-speed operation used for normal weight selection, the endless body 1 is run at the high-speed operation. An accurate zero point correction value can be read as compared with the case where the zero point correction value is read in a state where the zero point correction value is read.

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 the weight selection can be started since the endless body 1 is switched from the slow speed operation to the high speed operation.

When the zero-reset control unit 21 switches the motor 20 to high-speed operation in step [a-6], the specified time N is set in the internal timer of the zero-reset control unit 21 in step [a-7] to set the timer time. Start incrementing. In step [a-8], it is checked whether or not the remaining time of the timer has become "0".

Thus, in step [a-6], the high-speed operation state is switched to and high-speed weight sorting is started. Therefore,
The zero / reset control unit 21 makes zero in step [a-3].
Since the structure is such that practical weight selection is not performed unless the operation of the reset switch 24 is detected, it is possible to surely prevent a weight selection error due to a weighing error by forgetting to perform zero reset on the weighing device 7.

In FIG. 1, the first and second position detectors are shown as a bucket detector 27, and are based on the weight value and tare amount of the weighing device 7 and the weight ranks of the sorting stations 4 ₁₀ to 4 _41. The part that controls the discharge triggers 8 ₁₀ to 8 ₄₁ is described as a sorting control unit 28.

When it is detected that the remaining timer time has reached "0" in step [a-8] during the high-speed weight sorting operation,
The zero / reset control unit 21 sets the motor in step [a-9].
20 is switched to the slow speed operation state, and the zero reset execution instruction 25 is output to the weighing device 7 in step [a-10].
On the side of the weighing device 7 that has detected this, when the state where the net weight value is near the zero point and the state continues for a certain time or longer is detected, 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 26 is output from the weighing device 7 to the zero reset control unit 21. When the zero reset controller 21 detects the zero reset completion signal 26 in step [a-11], the zero reset controller 21 instructs the motor 20 to operate at high speed in step [a-12], and Restart sorting, step [a-7]
To [a-9], [a
-10], [a-11], and [a-12] are repeated to automatically execute zero reset.

As described above, since the zero reset is automatically executed at each timer time even during the operation, it is possible to prevent the weight selection error due to the measurement error even when the operation is continuously performed for a long time. In addition, zero
Even at reset, the endless body 1 at the time of reading the zero point correction value is operating at a very slow speed, which is sufficiently slower than the high speed operation used for normal weight selection. An accurate zero point correction value can be read as compared with a case where the zero point correction value is read in the state of being set.

In the above embodiment, steps [a-1] to [a-6]
After executing the zero reset forgetting prevention routine D immediately after the start of operation, which is represented by the step, the steps [a-7] to [a-1]
Although the automatic zero reset routine E after the start of operation represented by 2] is executed, it is necessary to execute only one of the zero reset forget prevention routine D or the automatic zero reset routine E. You may comprise.

In each of the above-mentioned embodiments, the zero reset forgetting prevention routine D executes the zero reset switch 24 in step [a-3].
Has been configured to instruct the weighing device 7 to perform zero reset by detecting that it has been manually operated. However, in step [a-2]
It is also possible to skip the step [a-3] and automatically execute the step [a-4].

EFFECTS OF THE INVENTION As described above, according to the configuration of each claim, since the weighing device is provided in the transport path of the endless body that transports the bucket on which the item to be sorted is placed, the transfer of the item to be sorted as in the past is performed. Can be eliminated, and high-speed weight sorting can be realized.

Further, in the configuration of claim 1, a zero-reset control unit that detects that a zero-reset instruction has been input to the weighing device after the start of operation and switches the transport speed of the endless body from the slow speed operation to the high speed operation is provided. Since it is provided, it is possible to reliably prevent the situation where the user gives a zero reset instruction to start practical weight sorting, and forgets to put the zero reset on the weighing device to carry out weight sorting. Therefore, it is possible to prevent an error in weight selection due to a measurement error. Further, in the configurations of claims 1 and 2, since the endless body at the time of reading the zero correction value is operating at a very low speed, which is sufficiently slower than the high speed operation used for normal weight selection, Since an accurate zero point correction value can be read as compared with a case where the zero point correction value is read while the body is traveling at the high speed operation, an accurate weight selection can be realized by the accurate zero point correction.

In the configuration of claim 2, when a lapse of a specified time is detected, the transport speed of the endless body is switched from a high speed operation to a very low speed operation, a zero reset is instructed to the weighing device, and the completion of the zero reset is detected. A zero-reset control unit that switches the transport speed of the endless body from slow-speed operation to high-speed operation is provided.
Since the reset is performed, even if the machine is continuously operated for a long period of time, it is possible to prevent a mistake in weight selection due to a measurement error and expect accurate weight selection.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an electric circuit of an embodiment of a weight sorting apparatus of the present invention, FIG. 2 is a flow chart diagram of a zero reset control section of the apparatus, FIG. 3 is a plan view of the apparatus, and FIG. Is a front view of the apparatus, FIG. 5 is a cross-sectional view of the apparatus, FIG. 6 is an overall perspective view of the apparatus, and FIG. 7 is a configuration diagram of a conventional weight sorting apparatus. 1 ...... endless member, 2 ...... bucket, 4 _{10-4 40,} 4 _{11-4 41}
…… Discharge station, 7 …… Weighing device, 8 ₁₀ to 8 ₄₀ , 8 ₁₁
~ 8 ₄₁ ...... Ejection trigger, 20 ...... Motor, 21 ...... Zero
Reset controller, 24 ... Zero reset switch.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomokazu Masumoto 2-35, Jimmucho, Yao City, Osaka Prefecture Kubota Co., Ltd. Kuhoji Temple Factory (56) Reference JP-A-56-89885 (JP, A) Sho 59-56529 (JP, U)

Claims (2)

[Claims] Claims: 1. A plurality of buckets mounted on a rotation-driven endless body at predetermined intervals to place a product to be sorted, and a product to be sorted placed on each end of the transport path of the endless body and being transported. The weighting device that measures the weight of the bucket is tilted by comparing the set weights of the objects placed in the endless transport path with the weighing values of the objects to be sorted that are passed through the bucket. And a discharge station that discharges the products to be sorted, and a zero station that detects that a zero reset instruction has been input to the weighing device after the start of operation and switches the transport speed of the endless body from a slow speed operation to a high speed operation. And a reset control unit for reading the zero-point correction value used for zero reset of the weighing device at the fine speed operation which is slower than the normal speed operation at the high speed. 2. A plurality of buckets mounted at predetermined intervals on an endless body that is rotationally driven to carry a product to be sorted, and a product to be sorted that is placed on each end of the transport path of the endless body and is being transported. The weighting device for measuring the weight of the bucket is tilted by comparing the set weights of the objects placed on the endless transport path with the weight values of the objects to be sorted on which the buckets pass. The discharge station for discharging the products to be sorted, and the lapse of a specified time are detected, and the conveying speed of the endless body is switched from high-speed operation to very low-speed operation to instruct the weighing device to perform zero reset and zero reset is performed. A zero-reset control unit that detects the completion of the endless body and switches the conveying speed of the endless body from a low speed operation to a high speed operation, and sets the conveying speed of the endless body to a high speed operation during the weighting. In addition, a weight sorting device that reads the zero point correction value used for zero reset of the weighing device at the very low speed operation slower than the high speed operation.