JP2014044153A - Rotary weight sorting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform maintenance inspection work for a plurality of meters of a rotary weight sorting machine.SOLUTION: A rotary weight sorting machine is provided with a plurality of meters around a turn table 2; measures weight of an article 13 supplied to article holding parts S1-S16 of the meters while rotating the turn table 2, to determine a weight rank; and discharges the article 13 at sorting positions 1-8 corresponding to the determined weight rank and sorts it. When maintenance inspection of the meters is performed, the rotary weight sorting machine operates a setting display part in an operation box 3 to designate a meter to be inspected, and thereby the designated meter automatically moves while rotating and stops at an operation position in which operation for maintenance inspection is performed.

Description

  The present invention relates to a rotary weight sorter.

  Conventionally, as a weight sorter, a plurality of weighing instruments are provided around the rotating body, and the weight rank is determined by measuring the weight of the articles supplied to the weighing instrument while rotating the rotating body. Corresponding to the determined weight rank There is a rotary weight sorter that discharges and sorts articles at sorting positions (see, for example, Patent Documents 1 to 5).

JP 63-191925 A JP-A-5-31464 JP-A-5-142023 JP-A-6-39352 JP-A-6-198252

  In such a rotary weight sorter, each of the plurality of weighing devices holds an article to be supplied and discharges the article at a distribution position corresponding to the weight rank, and detects the load of the article holding part. A load cell such as a load cell, and each article holding portion is attached to the periphery of the rotating body via the load sensor.

  In such a rotary weight sorter, it is necessary to perform maintenance and inspection of a plurality of measuring instruments around the rotating body, for example, to adjust a span of a load sensor and replace parts of an article holding unit.

  This maintenance and inspection work needs to be performed for each measuring instrument provided in plural along the circumference around the rotating body, so the operator needs to go to the measuring object to be inspected. . For example, in load sensor span adjustment work, the operator goes from the operation position for performing various setting operations on the weight sorter to the place of the measuring instrument to be inspected, and the weight is placed on the weighing instrument holding part. It was necessary to work while going back and forth between the measuring instrument to be inspected and the operation position, such as returning to the operation position and operating again, which was complicated and inefficient. .

  The present invention has been made in view of the above points, and a main object of the present invention is to enable efficient maintenance and inspection work in a rotary weight sorter.

  In order to achieve the above object, the present invention is configured as follows.

 (1) The rotary weight sorter of the present invention is provided with a plurality of measuring instruments around the rotating body, measures the weight of articles supplied to the measuring instrument while rotating the rotating body, determines the weight rank, A rotary weight sorter that discharges and sorts articles at a sorting position corresponding to the determined weight rank, and rotates the designated weighing device to a preset target rotation position.

  The preset target rotational position may be a fixed position or may be changed and set. The target rotational position is preferably a position at which the rotary weight sorter is operated in order to perform maintenance and inspection of the weighing instrument.

  According to the rotary weight sorter of the present invention, when performing maintenance and inspection of a plurality of measuring instruments, the operation position for performing the maintenance inspection is set as the target rotation position and the measuring instrument to be inspected is designated. By doing so, the measuring instrument to be inspected automatically rotates and moves to the operating position, so there is no need for the operator to go back and forth between the measuring instrument to be inspected and the operating position. Inspection work can be performed efficiently.

 (2) In a preferred embodiment of the rotary weight sorter according to the present invention, input means for designating the measuring instrument, driving means for rotationally driving the rotating body provided with the plurality of measuring instruments, Based on the detection means for detecting the rotational position of a plurality of weighing instruments, the detection output of the detection means and the designation of the weighing instrument by the input means, the driving means is controlled, and the designated weighing instrument is And a control means for rotationally moving the target rotational position.

  In the input means, it is preferable to designate a measuring instrument and input a target rotational position.

  According to this embodiment, when performing maintenance and inspection of a plurality of measuring instruments, the operation position for performing the maintenance and inspection is set as the target rotation position, and the measuring instrument to be inspected is designated and input from the input means. Thus, the control means controls the drive means based on the detection output of the detection means, and automatically rotates the measuring instrument to be inspected to the operation position.

 (3) In another embodiment of the rotary weight sorter according to the present invention, the control means may be configured such that the designated measuring instrument is close to the target rotational position and the rotational position of the designated measuring instrument is The speed of the rotational movement is switched between a low speed and a high speed depending on whether the distance to the target rotational position is less than the set distance.

  According to this embodiment, when the designated measuring instrument is rotated to the target rotation position, the time required to reach the target rotation position is shortened by rotating at a high speed up to the set distance, while the target rotation is shorter than the set distance. When approaching the position, it can be rotated at a low speed and stopped at the target rotational position, and the designated measuring instrument can be efficiently moved to the target rotational position.

 (4) In another embodiment of the rotary weight sorter according to the present invention, the detection means attaches one of a disk and a photoelectric sensor formed with a plurality of slits to the rotating body, and arranges the other at a fixed position. The output of the photoelectric sensor that detects the slit of the disk is digitized by an encoder.

  According to this embodiment, the slit formed in the disk is detected by the photoelectric sensor according to the rotation of the rotating body and digitized by the encoder, so that the digital corresponding to the rotational position of the measuring instrument provided in the rotating body The value can be acquired.

 (5) In still another embodiment of the rotary weight sorter of the present invention, a sensor for detecting an object is provided around the plurality of weighing devices, and the control means is configured to detect an object based on the output of the sensor. Is detected, the rotational movement of the designated measuring instrument to the target rotational position is prohibited.

  It is preferable to notify that the sensor has detected an object, together with the prohibition of the rotational movement of the designated measuring instrument.

  According to this embodiment, when an operator performing maintenance inspection tries to move the measuring instrument to be inspected to the designated operation position, or while the designated measuring instrument is moved to the target rotation position, the maintenance inspection is performed. When another worker in the blind spot of the worker performing the operation is inadvertently close to the weighing instrument, it is detected by a sensor that detects an object around the weighing instrument, thereby prohibiting the rotation of the weighing instrument, or The rotating measuring instrument will be stopped immediately.

  According to the rotary weight sorter of the present invention, when performing maintenance and inspection of a plurality of measuring instruments, the measuring instrument to be inspected can be automatically rotated to the operation position for performing maintenance and inspection. Therefore, unlike the conventional case, it is not necessary for the operator to go back and forth between the measuring instrument to be inspected and the operation position, and the maintenance inspection work can be performed efficiently.

It is a top view showing a schematic structure of a rotary weight sorter concerning an embodiment of the present invention. It is a block diagram of the rotary weight sorter of FIG. It is a top view of a rotation position detector. It is a schematic plan view for demonstrating the operation | movement for a maintenance inspection. It is a flowchart which shows the operation | movement for a maintenance check. It is a figure which shows the operation screen of a maintenance inspection. 6 is a flowchart corresponding to FIG. 5 of another embodiment of the present invention. It is a top view which shows schematic structure of the rotary weight sorter which concerns on further another embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a plan view showing a schematic configuration of a rotary weight sorter according to an embodiment of the present invention.

  The rotary weight sorter 1 of this embodiment includes a turntable 2 that rotates around a rotation center O in a direction indicated by an arrow A at a predetermined rotation speed, and around the turntable 2, integrally with the turntable 2. A plurality of rotating, in this example, 16 article holding units S1 to S16 are provided, and a control box 21 that houses a first control unit, which will be described later, is provided on the rotary table 2. In addition, an operation box 3 is provided at a fixed position on the outer periphery of the turntable 2 and stores various setting operations for the rotary weight sorter 1 and a setting display unit, which will be described later, for performing display.

Each article holding portion S1 to S16 is supported by the lower portion of the turntable 2 by the load sensor 5 ₁ to 5 ₁₆ consisting of a load cell (LC) for detecting the load of each article holding portion S1 to S16, the holding each article Sixteen measuring instruments are configured by the parts S1 to S16 and the load sensors 5 _{1 to} 5 ₁₆ .

  An article 13 such as a seafood or an agricultural product such as a fish is dropped and supplied from the supply conveyor 4 onto the article holders S1 to S16. In the supply conveyor 4, the placement areas on which the articles 13 are individually placed are partitioned at predetermined intervals by a crosspiece or the like, and the articles 13 are conveyed in the direction indicated by the arrow B. One of the rotating article holding portions S1 to S16 and one of the placement areas of the supply conveyor 4 operate in synchronization, and one article 13 placed in each placement area is supplied to the supply conveyor. 4 is sequentially supplied to each of the article holders S1 to S16 that have been rotated to the supply position below the conveyance end.

  In the article supply range shown in FIG. 1, the weight of the article 13 supplied from the supply conveyor 4 to the article holding units S1 to S16 is measured while rotating, and the measured weight value and the preset boundary weight value are set. Based on this, the weight rank is determined.

  In this embodiment, it is determined as one of eight weight ranks (1) to (8). The article 13 for which the weight rank is determined is the article holding units S1 to S16 at the distribution positions (1) to (8) corresponding to the determined weight rank in the discharge range along the circumferential direction shown in FIG. The gate is opened and discharged and sorted.

  FIG. 2 is a block diagram of the rotary weight sorter 1 of FIG.

The rotary table 2 is rotationally driven by a motor 7 as a driving means, and outputs of _four photoelectric sensors 12 _{1 to} 12 ₄ for detecting a rotational position, which will be described later, are given to a rotary unit 11 that rotates together with the rotary table 2. Encoder 10, an output of the encoder 10 and load signals from the load sensors 5 _{1 to} 5 ₁₆ are given, and electromagnetic valves 14 _{1 to} 14 ₁₆ for opening and closing the gates of the article holding portions S1 to S16, etc. The 1st control part 9 which controls is provided.

The first control section 9, based on the output of the encoder 10, as well as determine the rotational position of each article holding portion S1 to S16, based on the load signals from the load sensors 5 ₁ to 5 _16, the article holding portion S1 The weight value of the article 13 supplied to S16 is calculated, compared with a preset boundary weight value, the weight rank of the article 13 is determined, and the corresponding solenoid valve is driven at the distribution position corresponding to the weight rank. Then, the gate of the article holding unit is opened and the article 13 is discharged.

  The first control unit 9 on the rotation side is connected to the second control unit 6 on the fixed side via a rotary connector or the like so as to be communicable. The second control unit 6 has a setting display unit 15 as input means for displaying data from the second control unit 6 while setting the boundary weight value for weight rank determination, the rotation speed of the turntable 2, and the like. Connected. In this embodiment, the setting display unit 15 is configured with a touch panel. The second control unit 6 controls driving of the motor 7 via the motor controller 8.

FIG. 3 shows a plan view of a main part of a rotational position detector as a detecting means for detecting the rotational positions of the article holding portions S1 to S16. The rotational position detector 16 includes the above-described four photoelectric sensors including a disk 18 in which a plurality of arc-shaped slits 17 along the circumferential direction are formed, and a light projecting and light receiving element installed at a fixed position across the disk 18. 12 _{1 to} 12 ₄ .

  The disk 18 is attached to the rotating shaft of the turntable 2 and rotates integrally with the turntable 2. Therefore, the disk 18 rotates integrally with the article holding portions S1 to S16 of each measuring instrument.

Each of the photoelectric sensors 12 _{1 to} 12 ₄ has a pair of upper and lower mounting bars 19 fixedly installed so as to face each other across the disk 18 above and below the disk 18 (only the upper bar 19 is shown in the figure). The light projecting element and the light receiving element are attached so as to face each other. These four photoelectric sensors 12 _{1 to} 12 ₄ are arranged along the radial direction (radial direction) of the disk 18. Each arc-shaped slit 17 of the rotating disk 18 is formed at a position corresponding to one of the _four photoelectric sensors 12 _{1 to} 12 ₄ . Therefore, when the slits 17 face all four photoelectric sensors 12 _{1 to} 12 ₄ , the slits 17 are arranged in four rows along the radial direction.

The slits 17 of the disk 18 are provided at the positions of the _four photoelectric sensors 12 _{1 to} 12 ₄ for each section obtained by dividing the rotation circumference into 16 equal parts, that is, corresponding to the 16 article holding units S1 to S16, respectively. In addition, 16 combinations with respect to the presence or absence of the slit 17 are formed.

Slit 17 disc 18 rotates and, when passing through the position of the photoelectric sensor 12 ₁ to 12 _4, light projected from the light projecting element of the photoelectric sensor 12 ₁ to 12 _4, the light receiving element without being blocked by the disc 18 in one to be received, a portion slits 17 are not formed in the disc 18, when passing through the position of the photoelectric sensor 12 ₁ to 12 _4, light projected from the light projecting element of the photoelectric sensor 12 ₁ to 12 _4, It is blocked by the disk 18 and cannot be received by the light receiving element.

As described above, the slits 17 of the disk 18 have 16 combinations for the presence or absence of the slits 17 at the positions of the _four photoelectric sensors 12 _{1 to} 12 ₄ for each section obtained by dividing the rotation circumference into 16 equal parts. because it is formed, is 16 units of each article holding portion S1 to S16, four of each which passes each position of the photoelectric sensor 12 ₁ to 12 _4, the four combinations of output of the photoelectric sensor 12 ₁ to 12 ₄ The rotation positions of the article holding units S1 to S16 can be detected.

As another embodiment, the disk 18 is fixed, and the inner peripheral ends of a pair of upper and lower bars 19 to which the photoelectric sensors 12 _{1 to} 12 ₄ are attached are attached to the rotating shaft of the turntable 2 and photoelectrically operated. sensors 12 ₁ to 12 ₄ may be rotated.

The outputs of the _four photoelectric sensors 12 _{1 to} 12 ₄ are read as 4-bit digital data by the encoder 10 of FIG. 2, and in this example, the output of the photoelectric sensor 12 ₁ on the outer peripheral side is the least significant bit.

  In this embodiment, in order to efficiently perform maintenance / inspection work for 16 measuring instruments, the measuring instrument to be inspected is automatically rotated to a preset operation position during maintenance / inspection work. I have to.

  Next, the structure for this maintenance inspection work is demonstrated based on FIG.

  In this embodiment, as shown in FIG. 4, the rotation circumference of the 16 article holding units S1 to S16 is virtually divided into 16 equal parts, and the boundary positions are defined as the first to sixteenth boundary positions 1 to 16. The first boundary position 1 is the origin position. Of the 16 article holders S1 to S16, the first article holder S1 is used as a reference article holder.

  FIG. 4 shows a state where the tip in the rotation direction of the first article holding part S1 which is the reference article holding part is at the first boundary position 1 which is the origin position. In FIG. 4, the position of the supply conveyor 4 in FIG. 1 is indicated by a broken line, and the operation position 20 for operating the setting display unit 15 in the operation box 3 is illustrated.

  In this embodiment, when the tip in the rotational direction of the first article holding part S1 reaches the first boundary position 1, when it reaches the second boundary position 2, when it reaches the third boundary position 3, When the 4th boundary position 4 is reached,..., So that when the 15th boundary position 15 is reached and when the 16th boundary position 16 is reached, a corresponding 4-bit digital value is obtained. The rotational position detector 16 is installed.

  That is, when the leading end of the first article holding unit S1 in the rotational direction reaches the first boundary position 1 as shown in FIG. 4, the value of the 4-bit digital data becomes “0”, and the second When the boundary position 2 is reached, the value of the 4-bit digital data is “1”, and when the boundary position 3 is reached, the value of the 4-bit digital data is “2” and the fourth boundary position is reached. When 4 is reached, the value of the 4-bit digital data is “3”, and similarly, when the 16th boundary position 16 is reached, the value of the 4-bit digital data is “15”. In this example, 1 is added to the value of the 4-bit digital data, the number of the boundary positions 1 to 16 at which the leading end of the first article holding unit S1 in the rotation direction has reached, and the value of the 4-bit digital data “ “1” to “16” match.

This way four 4-bit digital data based on the output of the photoelectric sensor 12 ₁ to 12 _4, the rotational position of the first article holding portion S1 as a reference can be recognized, also, the first article holding The rotational positions of the other article holding parts S2 to S16 are also defined in relation to the part S1.

  The 14th boundary position 14 corresponding to the operation position 20 where the operation box 3 of FIG. 1 in which the setting display unit 15 is housed is arranged is initially set as the operation position when the maintenance and inspection work of the measuring instrument is performed. Has been. Note that the initial setting value can be changed by the setting display unit 15, and another position may be set as the operation position.

  In the state where the fourteenth boundary position 14 is initially set as the operation position 20, when the maintenance / inspection work is performed by automatically rotating the measuring instrument to be inspected to the operation position 20, the setting display unit 15 is displayed. Operate and specify the meter to be inspected. As a result, the above-described first and second control units 9 and 6 as the control means are configured so that the designated measuring instrument is based on the rotational position of the measuring instrument corresponding to the first article holding unit S1 serving as a reference. The turntable 2 is rotated and automatically stopped until the operation position 20 that is the target rotation position is reached.

  FIG. 5 is a flowchart showing the operation of the maintenance inspection work.

  In step S1, the setting display unit 15 is operated to display the maintenance inspection operation screen shown in FIG. In this operation screen, 16 buttons 31 for designating the scales 1 to 16 corresponding to the weighing units S1 to S16 and the scale to be inspected are moved to the operation position 20 that is the maintenance inspection position. A button 32 is displayed. In addition, a button 33 for moving the scale by +1 (one scale), a button 34 for designating the weight of the weight to be used, and the like are displayed. In step S1, in order to move the measuring instrument to be inspected to the operation position, the scales 1 to 16 to be inspected are selected by the button 31, and the button 32 for moving the selected scale to the operating position is operated.

  In step S2 of FIG. 5, the current rotational position of the scale is acquired. In this embodiment, the current position of the scale 1 corresponding to the reference first article holding unit S1 is acquired as described above based on 4-bit digital data.

  Next, in step S3, a target position is calculated. Here, in order to rotate the designated balance to the operation position 20, the target position refers to the tip of the balance 1 corresponding to the first article holding part S1 serving as a reference, as shown in FIG. This indicates which position of the 16 boundary positions 1 to 16 should be reached.

  This target position is calculated by the following equation.

Target position = (a + b + M−1) mod M
a: Operation position b: Number of scale to be inspected M: Total number of scales For example, if the scale 1 shown in FIG. 4 is moved to the 14th boundary position 14 which is the operation position 20, that is, the scale as the scale to be inspected. If 1 is selected, the target position is
Target position = (14 + 1 + 16-1) mod 16 = 14, and 1 is added to the above-mentioned 4-bit digital data value until the tip of the scale 1 in the rotational direction reaches the 14th boundary position 14 in FIG. What is necessary is just to move to the position where the obtained value becomes the boundary position number “14”.

Further, for example, if the scale 8 corresponding to the article holding unit S8 is selected as the scale to be inspected,
Target position = (14 + 8 + 16−1) mod 16 = 5, and 1 is added to the value of the 4-bit digital data described above until the tip of the balance 1 reaches the fifth boundary position 5 in FIG. What is necessary is just to move to the position where the obtained value becomes the boundary position number “5”.

  In FIG. 4, when the reference article holding part S1 reaches the fifth boundary position 5, the eighth article holding part S8 corresponding to the designated scale 8 reaches the operation position 20 in FIG. .

  Thus, based on the value of 4-bit digital data indicating which boundary position 1 to 16 is the tip of the article holding unit S1 serving as a reference, the designated scale reaches the operation position. The rotary table 2 is rotated.

  In step S4, the drive of the motor 7 is started and the turntable 2 is rotated.

  In step S5, the current position of the scale 1 serving as a reference is acquired in the same manner as in step S2.

  Next, in step S6, whether or not the current position of the acquired balance 1 has reached the target position calculated in step S3, that is, whether or not the designated scale has reached the operation position 20 that is the target rotational position. If it has reached, the process proceeds to step S7, and if not, the process proceeds to step S8.

  In step S7, the rotation of the motor 7 is stopped and the process is terminated.

  In step S8, for example, 500 msec is waited, and the process returns to step S5. That is, it is determined whether or not the scale to be inspected has reached the operation position 20 at intervals of 500 msec. Thus, the process is repeated until the scale to be inspected reaches the operation position 20 in step S6.

  When the scale to be inspected, i.e., the measuring instrument to be inspected, reaches the operation position 20, maintenance work for the measuring instrument to be inspected is performed. In the maintenance inspection, for example, a weight having a predetermined weight is placed on the article holding units S1 to S16 of the measuring instrument to be inspected, and the setting display unit 5 is operated for adjustment.

  As described above, at the time of maintenance and inspection of the measuring instrument, by operating the setting table unit 15 at the operation position 20, the measuring instrument to be inspected is automatically rotated to the operation position 20 and stopped. As in the prior art, it is not necessary for the operator to go back and forth between the measuring instrument to be inspected and the operation position, and the maintenance inspection work can be performed efficiently.

(Embodiment 2)
FIG. 7 is a flowchart corresponding to FIG. 5 of another embodiment of the present invention, and shows the processing after step S5 in FIG.

  In step S5 and step S6 of FIG. 7, the current position of the scale 1 is acquired and it is determined whether or not the target position has been reached, as in the first embodiment.

  In step S6, when the reference scale 1 has not reached the target position, that is, when the designated scale has not reached the operation position 20, the process proceeds to step S9. In step S9, it is determined whether or not the distance from the current position of the scale 1 to the target position is smaller than a threshold value that is a set distance.

  When the distance from the current position of the scale 1 to the target position is not smaller than the threshold value, the motor 7 is rotated at a high speed and the process proceeds to step S12 (step S11). When the distance is smaller than the threshold value, the motor is rotated at a low speed and the process proceeds to step S12. Proceed (step S10). In step S12, the process returns to step S5 after waiting for 500 msec.

  What is necessary is just to set each rotational speed of high speed rotation and low speed rotation arbitrarily. For example, a specific numerical value is input from the setting display unit 15.

  Thus, during the period when the current position of the measuring instrument to be inspected is more than the set distance from the operation position, it is possible to shorten the time until the measuring instrument to be inspected reaches the operating position by rotating the turntable 2 at a high speed, When the measuring instrument to be inspected approaches the operating position, the turntable 2 can be rotated at a low speed to accurately stop the measuring instrument to be inspected at the operating position.

  Other configurations are the same as those in the first embodiment.

(Embodiment 3)
FIG. 8 is a plan view showing a schematic configuration of still another embodiment of the present invention, and parts corresponding to those in FIG.

  In this embodiment, two sets of area sensors 41 that detect an approach of another worker to an area around the rotary weight sorter 1 that is a blind spot of a worker who performs work at the operation position 20. 42; 43, 44 are installed.

  Each set of area sensors 41, 42; 43, 44 has a required height so that an operator can be detected. Light is emitted from one sensor 41, 43, and the other sensor 42, 44. The light that has passed through the detection region is received, and the detection outputs of the other sensors 42 and 44 are given to the second control unit 6 in FIG.

  In this embodiment, when another worker enters one of the detection areas of the area sensors 41, 42; 43, 44, the second control unit 6 is based on the detection output of the area sensors 41, 42; 43, 44. Prohibits the rotation of the turntable 2, or immediately stops the rotation of the turntable 2 when the turntable 2 is rotating. At the same time, the setting display unit 15 displays a display to that effect, for example, a pop-up screen such as “A person has been detected.

  According to this embodiment, when the operator at the operating position tries to rotate the measuring instrument, when another operator enters the area around the measuring instrument that becomes the blind spot of the operator, the rotation of the measuring instrument is prohibited. In the case of rotation, the rotation can be stopped immediately, and the safety of maintenance and inspection work can be improved.

  The present invention is useful as a rotary weight sorter that sorts articles such as agricultural and fishery products by weight.

1 Rotating weight sorter 2 Rotating table (Rotating body)
3 operation box 4 supply conveyor 5 _{1-5 16} load sensor 6 and the second control unit 7 motor 8 motor controller 9 first control unit 10 encoder 15 setting display section 16 the rotational position detector 17 slit 18 disc S1~S16 article holding portion

Claims (5)

A plurality of measuring instruments are installed around the rotating body, and the weight of the articles supplied to the measuring instrument is measured while rotating the rotating body to determine the weight rank, and the articles are discharged at the sorting position corresponding to the determined weight rank. A rotary weight sorter that sorts
Rotating the designated measuring instrument to a preset target rotation position;
A rotary weight sorter characterized by that. Input means for designating the weighing instrument;
Driving means for rotationally driving the rotating body provided with the plurality of measuring instruments;
Detecting means for detecting a rotational position of the plurality of weighing devices;
Control means for controlling the drive means based on the detection output of the detection means and the designation of the measuring instrument by the input means to rotate the designated measuring instrument to the target rotational position;
A rotary weight sorter according to claim 1. The control means is configured to determine whether the designated measuring instrument is close to the target rotation position and the distance between the rotation position of the designated measuring instrument and the target rotation position is less than a set distance. , Switching the speed of the rotational movement between low speed and high speed,
The rotary weight sorter according to claim 2. The detecting means attaches one of a disk having a plurality of slits and a photoelectric sensor to the rotating body, and arranges the other at a fixed position, and digitally outputs an output of the photoelectric sensor for detecting the slit of the disk. Digitize,
The rotary weight sorter according to claim 2 or 3. A sensor for detecting an object is provided around the plurality of measuring instruments, and the control means rotates the designated measuring instrument to the target rotation position when detecting an object based on the output of the sensor. Ban movement,
The rotary weight sorter according to any one of claims 2 to 4.

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