JP6053458B2 - Weight sorter - Google Patents

Description

  The present invention relates to a weight sorter that sorts a weighed object for each predetermined weight rank, and more particularly, to a process for accommodating an object to be weighed sorted for each weight rank.

  For example, in Patent Document 1, the weight of an object to be weighed is measured by a weight sorter, the weight rank of the object to be weighed is determined according to the size of the weight, and the weight is determined at a predetermined distribution position for each determined weight rank. Weighed items are distributed from the transport line to the discharge chute and stored in storage containers according to weight rank arranged at the outlet of the discharge chute.

  In this weight sorter, the weight values of the objects to be weighed are counted for each weight rank, and when it is determined that the total weight of the objects to be weighed stored in the storage container via the discharge chute has reached a predetermined value, The stopper drive solenoid provided at the outlet of the discharge chute operates and automatically closes the gate provided at the outlet of the discharge chute to complete the accommodation of one batch of objects to be weighed in the storage container. Yes.

Japanese Patent Publication No. 8-18013

  In the weight sorter as described above, in order to guide the objects to be weighed distributed from the transport line to the storage container using the sliding-type discharge chute, and to store the total amount in the storage container accurately, the following There is a problem like this.

  That is, if the gate of the outlet is closed before the sorted objects reach the outlet of the discharge chute, the container does not store the objects to be weighed in the specified total amount accurately, and If the gate is closed when the object has just reached the outlet of the discharge chute, the object to be weighed will be caught in the gate.

  Patent Document 1 does not disclose the closing timing of the gate of the discharge chute when the objects to be weighed distributed from the conveyance line to the discharge chute reach a predetermined total amount.

  In addition, the gate of the outlet of the discharge chute is closed when the sorted objects reach a predetermined total amount.For example, the worker may not notice the arrival of the total amount, There is a problem that the objects to be weighed that are left without being replaced and newly distributed overflow from the discharge chute due to the closed gate. If an object to be weighed overflows from the discharge chute, it cannot be stored in a storage container by a predetermined total amount.

  The present invention has been made in view of the above-described points, and has an object to accommodate an object to be weighed divided into weight ranks by a predetermined total amount. The object is to prevent the material from staying and overflowing.

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

(1) The weight sorter of the present invention is a weight sorter that measures the weight of an object to be measured, determines a weight rank, and transports and distributes the object to be distributed to a distribution position corresponding to the determined weight rank. There,
Closing means capable of closing a passage through which the objects to be weighed distributed to the distribution position pass;
Setting means for setting a target value of the total amount of the objects of weight rank to be distributed to the distribution position, and controlling closing and release by the closing means based on the target value set in the setting means Control means for
The control means cancels the closing by the closing means until the total amount of the objects to be weighed distributed to the distribution position reaches the target value, while the control means releases the objects to be weighed to the distribution position. When the total amount reaches the target value, the object to be weighed passes through a portion of the passage that is closed by the closing means, and is subsequently distributed to the distribution position at the shortest interval. An object closes the passage by the closing means before reaching the closed point ;
After the passage is closed by the closing means, and before the closure is released, an allowable residence amount setting means for setting an allowable residence amount of an object to be weighed that stays in the passage;
And a permissible staying amount notifying unit for notifying that the object to be weighed staying in the passage has reached the permissible staying amount set by the staying amount setting unit .

  The target value of the total amount of the object to be weighed set by the setting means may be the target value of the total amount of the weight of the object to be weighed, or the target value of the total amount of the number of objects to be weighed. Good.

  “The distribution position” of “subsequent objects to be distributed to the distribution position at the shortest interval” means the distribution position that is the same as the distribution position at which the total amount of the objects to be measured reaches the target value.

The weight sorter sequentially weighs the objects to be weighed, determines the weight rank, and distributes them to the corresponding distribution position. Therefore, the “subsequent objects to be distributed at the shortest intervals” are sequentially weighed. This means the subsequent objects to be weighed when the objects to be weighed are continuously distributed to the same distribution position.
The allowable staying amount setting means may be used as setting means for setting a target value.
The allowable staying amount arrival notifying means only needs to be able to notify that the allowable staying amount has been reached. For example, the allowable staying amount arrival notifying means may be notified by the lighting state of the indicator lamp, the display of the display unit, or the sound, and may be combined and notified. You may do it.

  According to the weight sorter of the present invention, the closing of the passage by the closing means is released until the total amount of the objects to be weighed in the weight rank distributed to the distribution position reaches the target value, and the object to be distributed is distributed to the distribution position. When the total amount of the objects reaches the target value, the object to be weighed, that is, the last object to be weighed, passes through the closed part of the passage and is subsequently distributed to the distribution position at the shortest interval. Before the object to be weighed reaches the closed position, the passage is closed by the closing means, so that, for example, by placing a container for accommodating the object to be weighed at the end of the passage, While the last object to be weighed whose target amount is the target value is accommodated, the subsequent objects to be weighed are not accommodated, and the object to be weighed can be accommodated by the target summed amount. And it can prevent that a to-be-measured object is pinched | interposed into the closing means in the closed location of a channel | path.

In addition, using the period in which the passage is closed, the storage container in which the objects to be weighed are stored by the target total amount can be replaced with the next new storage container.
According to the present invention, since it is informed that the object to be weighed that is retained in the passage when the passage is closed has reached the allowable retention amount, the operator immediately replaces the object to be weighed with the new object container. It is possible to perform an operation for releasing the closed state, and thus it is possible to prevent the staying weighing object from overflowing.

(2) In a preferred embodiment of the present invention, the passage through which the object to be weighed distributed to the distribution position passes is an inclined discharge chute, and the closing means is a gate that opens and closes the discharge port of the discharge chute. ,
The control means opens the gate until the total amount of the objects to be distributed to the distribution position reaches the target value, while the total amount of the objects to be distributed to the distribution position is When the object reaches the target value, the object to be weighed passes through the discharge port of the discharge chute and the subsequent object to be distributed to the distribution position at the shortest interval is transferred to the discharge chute. Before reaching the outlet, the gate is closed.

  According to this embodiment, the gate that opens and closes the discharge port of the discharge chute is opened until the total amount of the objects of the weight rank distributed to the distribution position reaches the target value, and the total amount reaches the target value. When the last object to be weighed passes through the outlet of the discharge chute and before the subsequent object to be weighed to the distribution position at the shortest interval reaches the outlet of the discharge chute, Since the gate is closed, for example, by placing an accommodation container for accommodating the objects to be weighed at the end of the discharge chute, the container accommodates the last object to be weighed whose target value is the total value. Subsequent objects to be weighed are not accommodated, and objects to be weighed can be accommodated by the target total amount. In addition, the object to be weighed can be prevented from being caught in the gate at the discharge port of the discharge chute.

  Further, using the period in which the discharge port of the discharge chute is closed, the storage container in which the objects to be weighed are stored by the target total amount can be replaced with the next new storage container.

  (3) In another embodiment of the present invention, a pre-target value setting means for setting a pre-target value which is a value smaller than the target value, and a total amount of the objects to be weighed distributed to the distribution position, Pre-target value arrival notifying means for notifying that the pre-target value has been reached.

  The pre-target value setting means may be used as setting means for setting the target value.

  The target pre-value arrival notification means only needs to be able to notify that the target pre-value has been reached. For example, the target pre-value arrival notification means may be notified by the lighting state of the indicator lamp, the display of the display unit, or sound, and the combination thereof is notified. You may do it.

  According to this embodiment, when the total amount of the objects to be distributed to the distribution position reaches the pre-target value that is smaller than the target value, it is notified, so that the operator can perform the operation to be distributed to the distribution position. It is possible to grasp in advance that the total amount of the target will soon reach the target value, and for example, it is possible to prepare to replace the storage container containing the sorted objects with a new storage container. It becomes.

( 4 ) In another embodiment of the present invention, an operation unit operated to release the closing of the passage by the closing means is provided in the vicinity of the passage.

  According to this embodiment, when the total amount of the objects to be distributed to the distribution position reaches the target value and the passage is closed, a storage container that stores the target objects to be weighed for a new target is added. By replacing the storage container and operating the operation unit on the spot to release the closing of the passage, it is possible to quickly start storing the objects to be weighed for the next total amount in the new storage container.

  According to the present invention, for example, by placing a storage container at the end of a passage through which a measurement object to be distributed to a distribution position passes, the storage container can store a target total amount of measurement objects. In addition, the object to be weighed can be prevented from being caught by the closing means at the closed portion of the passage.

  In addition, using the period in which the passage is closed, the storage container in which the objects to be weighed are stored by the target total amount can be replaced with the next new storage container.

FIG. 1 is a plan view showing a schematic configuration of a weight sorter according to an embodiment of the present invention. 2A and 2B are diagrams showing the configuration of the measuring instrument of FIG. 1, wherein FIG. 2A is an enlarged plan view of the vicinity of the measuring instrument, and FIG. 2B is a vertical side view thereof. FIG. 3 is a diagram showing a plurality of weight ranks and their boundary weight values. FIG. 4 is a side view showing a discharge chute, a storage container, and the like arranged at the distribution position. FIG. 5 is a front view of the display operation panel of FIG. FIG. 6 is a block diagram showing a control configuration of the weight sorter of FIG. 7A and 7B are diagrams showing the configuration of the pulse generator, where FIG. 7A is a plan view and FIG. 7B is a partially longitudinal side view. FIG. 8 is a diagram showing pulses, (a) is a reset pulse, and (b) is a timing pulse. FIG. 9 is a diagram showing the relationship between the system state and the position of the weighing pan. FIG. 10 is a flowchart for explaining the operation. FIG. 11A is a flowchart showing details of the process of step n7-1 in FIG. FIG. 11B is a flowchart showing processing subsequent to FIG. 11A. FIG. 12 is a diagram showing the weighing pan that reaches each sorting position in each system state. FIG. 13 is a flowchart showing details of the process in step n8 of FIG. FIG. 14 is a flowchart showing details of the process in step n9 of FIG. FIG. 15 is a flowchart of a process for opening the outlet gate of the discharge chute.

  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 weight sorter according to an embodiment of the present invention.

  The weight sorter 1 according to this embodiment is a rotary type weight sorter, and includes a turntable 2 that rotates around a rotation center O in the direction of arrow A at a predetermined rotation speed. A plurality of, in this example, 16 weighing pans S1 to S16 that rotate integrally with the turntable 2 are provided. On the turntable 2, a control box 8 that houses a centralized control unit, which will be described later, is provided. ing.

Each weighing pan S1~S16 is by the load sensor 5 ₁ to 5 ₁₆ consisting of a load cell (LC) for detecting a load of the weighing pan S1~S16 is supported at the bottom of the turntable 2, the pan S1~ S16 and each of the load sensors 5 _{1 to} 5 ₁₆ constitute ₁₆ measuring instruments 3 _{1 to} 3 ₁₆ , respectively.

FIG. 2 shows the configuration of each of the measuring instruments 3 _{1 to} 3 ₁₆ , where FIG. 2A is an enlarged plan view of the vicinity of the weighing pan, and FIG. 2B is a longitudinal side view thereof. Since the sixteen measuring devices 3 _{1 to} 3 ₁₆ have the same structure, the sixteen measuring devices 3 _{1 to} 3 ₁₆ are representatively shown as the measuring device 3 in FIG.

  As shown in FIG. 2B, the load sensor 5 of each measuring instrument 3 is connected and supported by a support bracket 10 connected and fixed to the turntable 2, and the outer free end of the load sensor 5. The weighing pan S is connected to and supported by the portion in a cantilever shape facing outward.

  Each measuring instrument 3 supports a pair of gates 6 facing each other on a base end side bracket 7 connected and supported on the free end side of the load sensor 5 via a support shaft 9 so as to be swingable downward. On the free end side, a stay 11 that rotatably supports the support shaft 9 is provided. A pair of gates 6 of each measuring instrument 3 is configured to be driven to be opened by an actuator such as an air cylinder (not shown) so that an object to be weighed supplied on the gate 6 can be discharged.

  As shown in FIG. 1, an object to be weighed 13 such as a marine product or an agricultural product, such as a fish, is dropped and supplied from the supply conveyor 4 onto the weighing dishes S1 to S16. In the supply conveyor 4, the placement areas on which the objects 13 are individually placed are partitioned at predetermined intervals by bars or the like, and the objects 13 are conveyed in the direction indicated by the arrow B. One of the rotating weighing pans S1 to S16 and one of the placement areas of the supply conveyor 4 operate in synchronization, and a single object 13 placed on each placement area is supplied. It is sequentially supplied to each weighing pan S1 to S16 that has been rotated to the supply position below the conveyance end of the conveyor 4.

  In the article supply range shown in FIG. 1, the weight of the object 13 supplied from the supply conveyor 4 to the weighing pans S <b> 1 to S <b> 16 is measured while rotating, and the measured weight value and the preset boundary weight value are measured. Based on the weight rank is determined.

  In this embodiment, as shown in FIG. 3, based on the measured weight value Wx of the object 13 and the boundary weight values Wc1 to Wc7, the weight rank of the object 13 is set as follows: It is determined as one of the weight ranks (1) to (8).

・ Wx <Wc1 Weight rank (1)
・ Wc1 ≦ Wx <Wc2 Weight rank (2)
・ Wc2 ≦ Wx <Wc3 Weight rank (3)
……………………………………………………………
・ Weight rank (7) when Wc6 ≦ Wx <Wc7
・ When Wc7 ≦ Wx Weight rank (8)
The to-be-measured item 13 for which the weight rank has been determined is the weighing pans S1 to S1 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 above-mentioned pair of gates 6 in S16 are driven to open and discharged.

  In this embodiment, as shown in FIG. 1, the outer peripheral positions 1, 2, 3,. Determine. Virtual extension lines d1 to d8 indicate boundaries between the respective outer peripheral positions 1 to 8.

  Since 16 weighing pans S1 to S16 are arranged along the rotation circumference, each of the outer peripheral positions 1, 2, 3,... 8 is a section that can correspond to one weighing pan.

  The outer peripheral position 1 is located one section ahead of the first distribution position (1), and the outer peripheral positions 2 to 8 are positions corresponding to the distribution positions (1) to (7), respectively.

  It should be noted that the weighing pan from when the object to be weighed 13 is supplied to the weighing pans S1 to S16 at the supply position until it is transported to the sorting positions (1) to (8) corresponding to the weight rank of the object to be weighed 13 and distributed. In the rotation path of S1 to S16, the upstream side in the rotation direction (side near the supply position) is referred to as the front, and the downstream side in the rotation direction (side away from the supply position) is referred to as the rear.

  In this embodiment, in the rotation path of the weighing pans S1 to S16, the weight of the weighing object 13 is acquired and the weight rank is obtained at the outer peripheral position 1 immediately before the distribution position (1) where the weighing object 13 is first provided. The determination is made and distribution is performed at distribution positions (1) to (8) corresponding to the determined weight rank.

  In each of the distribution positions (1) to (8), a predetermined number of the objects to be weighed 13 having the respective weight ranks 1 to 8 can be batch-counted.

  That is, as shown in FIG. 4, inclined distribution chutes 12 that receive the objects 13 to be weighed discharged from the weighing pan S are disposed at the respective distribution positions (1) to (8). The discharge chute 12 has an inclined bottom wall 12a and a pair of opposing side walls 12b, and constitutes a passage through which an object to be weighed 13 distributed at each of the distribution positions (1) to (8) passes. ing.

  A support shaft 47 is installed between both side walls 12b on the outlet side, which is the discharge port of the discharge chute 12, and an outlet gate 14 constituting a closing means for closing the outlet of the discharge chute 12 is provided on the support shaft 47. It is supported so that it can swing.

  The outlet gate 14 is biased to the open side by a biasing member such as a spring (not shown), and is driven to swing toward the closing side against an biasing force by an actuator such as an air cylinder (not shown). It is comprised so that an exit can be closed.

  Below the outlet of the discharge chute 12, a storage container 15 for storing the object 13 to be slid down from the discharge gate 12 with the outlet gate 14 being open is disposed. When a predetermined total amount, in this embodiment, a predetermined number of objects 13 to be measured is stored in the storage container 15, the operator replaces it with a new storage container 15 as described later.

  A display operation panel 16 is installed in the vicinity of the position where the container 15 is arranged. As shown in the front view of FIG. 5, the display operation panel 16 is provided with a gate opening switch 19 operated to open the first and second display lamps 17 and 18 and the closed outlet gate 14. ing.

  The first display lamp 17 is, for example, lit yellow to notify the operator that the object to be weighed 13 accommodated in the container 15 has approached a predetermined number that is a target value. By turning on the 1 indicator lamp 17, the operator can know in advance that the objects to be weighed 13 in the storage container 15 will soon reach a predetermined number, and prepare for replacement with the next storage container 15. Etc. can be performed.

  The second display lamp 18 notifies, for example, that the object to be weighed 13 accommodated in the container 15 has reached a predetermined number which is a target value value by lighting in red. By lighting the lamp 18, the operator can grasp that the object to be weighed 13 in the container 15 has reached a predetermined number, and the outlet gate 14 is closed and the discharge chute 12 is closed as will be described later. The container 15 can be exchanged using the period in which the outlet is closed.

The discharge chute 12, the exit gate 14, the container 15 and the display operation panel 16 are arranged at the respective distribution positions (1) to (8) corresponding to the respective weight ranks. (1) which may indicate to (8) refer to numerals 12 ₁ to 12 ₈ subscripts in correspondence with, 14 _{1-14 8,} 15 ₁ to 15 _8, 16 ₁ to 16 ₈ and the like.

  FIG. 6 is a block diagram showing a control configuration of the weight sorter 1 of FIG.

Weight sorting machine 1 includes a measurement unit 20 ₁ to 20 ₁₆ to analog load signals are input to the load sensor 5 ₁ to 5 ₁₆ for detecting a load of the weighing pan S1~S16 above.

Each of the measurement units 20 _{1 to} 20 ₁₆ amplifies an analog load signal output from the load sensors 5 _{1 to} 5 ₁₆ and also includes an amplifier 21 incorporating an analog filter for removing high frequency noise, an arithmetic circuit 22, And a serial controller 23.

  The arithmetic circuit 22 includes an A / D converter (not shown) that converts an analog load signal output from the amplifier 21 into a digital load signal, and filters the A / D converted load signal (not shown). CPU and memory are provided.

Load signals generated by the respective measurement units 20 ₁ to 20 _16, the central control unit 24 as control means from the serial controller 23 provided in each of the measuring units 20 ₁ to 20 ₁₆ via a serial line SL1 It is sent to the serial controller 25.

  The centralized control unit 24 includes an arithmetic control circuit 26 including a CPU and a memory (not shown). The arithmetic control circuit 26 is supplied with timing from first and second photosensors PH1 and PH2, which will be described later, constituting a pulse generator. A pulse Tp and a reset pulse Rp are given through the I / O circuit 27, and the rotational positions of the weighing pans S1 to S16 are recognized based on these pulses Tp and Rp.

Central control unit 24 in order to discharge the objects to be weighed 13 at each distribution position (1) to (8), an air cylinder for opening and closing the pair of gate ₆₁ through ₁₆ of each weighing pan S1~S16 In order to open and close the weighing pan gate drive circuits 28 _{1 to} 28 ₁₆ to be driven and the exit gates 14 _{1 to} 14 ₈ of the discharge chutes 12 _{1 to} 12 ₈ installed at the distribution positions (1) to (8), respectively. exit gate drive circuit 31 for driving the air cylinder ₁ and to 31 _8, the first display operation panel _{161-164 8,} first to drive the second indicator lamp 17 _{1-17 8,} 18 _{1-18 8} respectively , Second display lamp driving circuits 32 _{1 to} 32 ₈ , 33 _{1 to} 33 ₈ .

Centralized control unit 24, a predetermined timing to collect load signals of all the weighing pan S1~S16 from the measuring unit 20 ₁ to 20 _16, i.e., the weight value when located at the peripheral position 1 of Figure 1 described above To get.

The arithmetic control circuit 26 of the centralized control unit 24 acquires the weight value, determines the weight rank, discharges the object 13 at the distribution positions (1) to (8) corresponding to the weight rank, and performs the vibration. In order to divide the air cylinder, the air cylinder that opens the pair of gates 6 _{1 to} 6 ₁₆ of each weighing pan S _{1 to S 16} is driven via the I / O circuit 27 and the weighing pan gate driving circuits 28 _{1 to} 28 ₁₆ .

The arithmetic control circuit 26 based on the operation of the gate open switch 19 _{1-19 8} display the operation panel _{161-164 8} installed respectively in the vicinity of the passage of the distribution position (1) ~ (8), I / It controls the opening and closing of the exit gate 14 _{1-14 8} via the O circuit 27 and an outlet gate drive circuit 31 ₁ to 31 _8. Specifically, the closed exit gates 14 _{1 to} 14 ₈ are opened according to the operation of the gate opening switches 19 _{1 to} 19 ₈ .

  Further, the arithmetic control circuit 26 of the centralized control unit 24 controls the motor 30 via the I / O circuit 27 and the motor drive circuit 29, and thereby the rotational speed of the turntable 2 rotated by the motor 30 is determined. Control to the set rotation speed.

  The arithmetic control circuit 26 of the central control unit 24 transmits the acquired weight value, the determined weight rank, and the like to the display setting unit 35 outside the rotating body via the serial controller 34 of the central control unit 24, and the display setting unit. In 35, the data is received by the serial controller 36 via the serial line SL2.

  Communication between the central control unit 24 on the rotation side and the display setting unit 35 on the fixed side is performed by a rotary connector (not shown), and the power supplied to the display setting unit 35 side is for power supply (not shown). Power is supplied to the central control unit 24 through the slip ring. The central control unit 24 and the display setting unit 35 may be provided with a wireless transmission / reception circuit for wireless communication.

  The display setting unit 35 has a calculation control circuit 37 including a CPU and a memory (not shown), a boundary weight value for weight rank determination, a rotational speed, a predetermined number as a target value of the total amount, and a value smaller than the target value. An input unit 38 having a function as setting means for setting a pre-target number value, a display unit 39 for displaying data transmitted from the central control unit 24, and an I / O circuit 40 are provided. The input unit 28 includes various operation switches for setting.

  Next, control in the central control unit 24 will be described.

  First, creation of a system state for recognizing where each weighing pan S1 to S16 is located will be described.

  The central control unit 24 recognizes the positions of the weighing pans S1 to S16 on the rotation circumference by the pulses from the pulse generator shown in FIGS. 7A and 7B, and on the circumference of the weighing pans S1 to S16. The centralized control unit 24 creates a system state corresponding to the position.

  The turntable 2 and the weighing pans S1 to S16 shown in FIG. 1 are supported by a column 41 provided at the rotation center O, and the weighing pans S1 to S16 also rotate when the column 41 is driven to rotate by the motor 30 described above. .

  An optical sensor bar 42 is attached to the column 41, and the optical sensor bar 42 rotates around the rotation center O together with the column 41.

  A first photosensor PH1 composed of a light projecting / receiving element for generating a timing pulse Tp and a second photosensor PH2 composed of a light projecting / receiving element for generating a reset pulse Rp are attached to the tip of the optical sensor bar 42, and a fixing portion 43 is attached. Is attached with an annular ring 44. This annular ring 44 is provided with 16 timing pulse generation slits 45 at positions that divide the circumference into 16 equal parts, of which one timing pulse generation slit 45 overlaps the angle to generate timing pulse. A reset pulse generating slit 46 that is slightly wider than the slit 45 is provided.

  When the weighing pans S1 to S16 and the optical sensor bar 42 rotate, as shown in FIG. 8B in synchronization with the rotation of the weighing pans S1 to S16, 16 timing pulses Tp generated per one rotation of the optical sensor bar 42; As shown in FIG. 8A, one reset pulse Rp generated per rotation of the optical sensor bar 42 is generated and read by the central control unit 24.

  The pulse width pwr of the reset pulse Rp is wider than the pulse width pwt of the timing pulse Tp. The central control unit 24 includes a clock pulse generation circuit that generates a pulse signal whose period is sufficiently shorter than the timing pulse width pwt. The reset pulse Rp and the timing pulse Tp are read by the arithmetic control circuit 26 of the central control unit 24 by the interrupt processing program having the highest priority activated by the pulse signal from the clock pulse generation circuit.

  The circular ring 44 is installed on the fixing portion 43 of the main body so that the line a in the circular ring 44 of FIG. 7 substantially overlaps the position of the virtual extension line d1 shown in FIG. The optical sensor bar 42 is provided so as to overlap the position of the end g on the rotation advance side of the weighing pan S1 in FIG.

  Then, when the end portion g on the rotation advance side of the weighing pan S1 reaches the position of the virtual extension line d1, the reset pulse Rp and the timing pulse Tp1 in FIGS. 8A and 8B are generated. Thereafter, the end g on the rotation advance side of the weighing pan S1 reaches the virtual extension line d2, the weighing pan S1 completely overlaps the outer peripheral position 1, and a timing pulse Tp2 is generated by the next timing pulse generating slit 45. However, a state until the timing pulse Tp2 is generated is defined as a system state P1.

  In addition, after the timing pulse Tp2 is generated, the weighing pan S1 is completely overlapped with the outer peripheral position 2, and the timing pulse Tp3 is generated by the next timing pulse generating slit 45. The state until this timing pulse Tp3 is generated Is defined as a system state P2.

  Similarly, every time the timing pulses Tp3, Tp4,... Tp16... Are generated, the system state P3, P4,.

  As described above, the system state proceeds every time the timing pulse Tp is generated while the weighing pans S1 to S16 and the optical sensor bar 42 rotate around the circumference, advances to the system states P1 to P16, and again the system state P1. Return to and repeat.

  FIG. 9 shows which weighing pans S1 to S16 are at the outer peripheral positions 1 to 8 in FIG. 1 in each of the system states P1 to P16.

  The system state P1 is from when the weighing pan S1 starts to enter the outer peripheral position 1 until it completely enters and overlaps, that is, in FIG. 1, the end g on the rotation advance side of the weighing pan S1 exceeds the virtual extension line d1. This corresponds to the period up to the extension line d2. During this period, the weighing pan S16 is at the outer peripheral position 2, the weighing pan S15 is at the outer peripheral position 3, the weighing pan S14 is at the outer peripheral position 4, the weighing pan S13 is at the outer peripheral position 5, and the weighing pan S12 is at the outer peripheral position 6. The pan S11 enters the outer peripheral position 7 and the weighing pan S10 starts to enter the outer peripheral position 8, respectively.

  In the system state P2, the weighing pan S2 is at the outer circumferential position 1, the weighing pan S1 is at the outer circumferential position 2, the weighing pan S16 is at the outer circumferential position 3, the weighing pan S15 is at the outer circumferential position 4, and the weighing pan S14 is at the outer circumferential position 5. The weighing pan S13 enters the outer peripheral position 6, the weighing pan S12 enters the outer peripheral position 7, and the weighing pan S11 enters the outer peripheral position 8, respectively.

  Similarly, as the system state advances, the weighing pans that enter the respective outer peripheral positions 1 to 8 are shifted one by one.

  In the state shown in FIG. 1, since the weighing pans S16 to S9 are completely overlapped with the outer peripheral positions 1 to 8, respectively, the system state S16 is completed as shown in FIG. Shows just before the start.

  FIG. 10 is a flowchart for explaining the operation of the present invention, and is executed by the arithmetic control circuit 26 of the central control unit 24. The built-in clock pulse generation circuit interrupts the CPU of the arithmetic control circuit 26 with a clock pulse of 1 msec, for example, and performs processing with the highest priority. That is, it is executed with the highest priority every 1 msec. The slits 45 and 46 of the ring 44 are formed so that each of the pulses Tp and Rp described above has a pulse width sufficiently longer than 1 msec even when the rotation of the turntable 2 is fastest.

  First, it is determined whether or not the timing pulse Tp is at a high level (step n1). If it is not at a high level, the system state transition flag Fc is reset to “0” because it is not the system state transition timing, and step n8 is performed. (Step n11).

  In step n1, when the timing pulse Tp is at a high level, it is determined that the system state transition timing is “0” (step n2), and the flag Fc is “0”. When it is not “0”, since the flag Fc is already set to “1”, the process proceeds to step n8.

  When the system state transition flag Fc is “0” in step n2, the process proceeds to step n3, the system state transition flag Fc is set to “1”, and it is determined whether or not the reset pulse Rp is at high level ( Step n4) When it is at the high level, it is determined that it is the transition timing to the system state P1, and the counter Px indicating which system state is set to “1” indicating the system state P1. The process moves to n6 (step n5).

  In step n4, when the reset pulse Rp is not at the high level, “1” is added to the count value of the counter Px, assuming that it is the transition timing to the system states P2 to P16 other than the system state P1, and step n6 (Step n10).

  In step n6, it is determined which system state has started based on the count value of the counter Px, and the process proceeds to steps n7-1 to n7-16 corresponding to the determined system states P1 to P16.

  For example, if the system state P1 is started, the process proceeds to step n7-1.

  11A and 11B are flowcharts showing details of the process of step n7-1 corresponding to the system state P1. In the system state P1, the weighing pan S1 begins to enter and completely overlaps with the outer peripheral position 1 in FIG. 1, which is a position where the weight value of the object 13 is obtained.

  First, as shown in FIG. 11A, the weight value of the weighing pan S1 is read (step n101), the weight rank is determined (step n102), and the process proceeds to step n103. If the determined weight rank is weight rank k, in step n103, “1” is set in the memory of the weight rank k of the distribution register for the weighing pan S1, and “0” is set in the memories of other weight ranks. .

  The distribution register is provided for each weighing pan S1 to S16, and each distribution register has a memory for weight ranks 1 to 8.

  Next, in order to accumulate the weight and the number of all the objects to be weighed 13 weighed by the weight sorter 1, the weight value is added to the register for accumulated total weight value in each weighing pan S1 to S16, and each weighing is performed. “1” is added to the common cumulative number register in the plates S1 to S16 (step n104).

In this embodiment, the total amount of one batch stored in each of the storage containers 151 to 158 at each distribution position corresponding to each of the weight ranks ₁ to ₈ is a predetermined number as described above.

  Therefore, in step n105, since the weight rank determined in step n102 is weight rank k, “1” is added to the batch number register for weight rank k shared by each weighing pan S1 to S16. To do.

  Next, it is determined whether or not the predetermined number arrival sign memory for the weight rank k, which indicates that the weighing object 13 having the weight rank k has reached the predetermined number, is “1” (step n106). If the arrival sign memory is not “1”, it is determined that the predetermined number has not yet been reached, and the process proceeds to step n110. If the predetermined number arrival sign memory is “1”, it is determined that the predetermined number has already been reached, and the process proceeds to step n107. Move.

  In step n107, since the number of objects to be weighed 13 having the weight rank k has already reached a predetermined number, the number of objects to be weighed on the discharge chute 12k is determined after the exit gate 14k is closed as will be described later. “1” is added to the staying count register for the weight rank k to be counted, and the process proceeds to Step n108.

  In step n108, it is determined whether or not the value of the stay count register for the weight rank k is equal to or greater than the allowable stay number E that is a preset allowable maximum stay number. The allowable staying number E is the maximum number of objects 13 to be measured that can be stored in the discharge chute 12 with the outlet gate 14 closed. The allowable staying number E can be set by operating the input unit 38 of the display setting unit 35 of FIG.

  In step n108, when the value of the stay count register for the weight rank k is not equal to or larger than the allowable stay number E, the process proceeds to step n110. When the value of the staying count register for the weight rank k is equal to or larger than the allowable staying number E, the process proceeds to step n109, and the staying alarm output is turned on for the weight rank k, for example, the display operation panel 16k corresponding to the weight rank k is displayed. The second display lamp 18k is flashed and notified to the operator, and the process proceeds to Step n110. The stay alarm output may be notified by providing a buzzer or the like on the display operation panel 16 and outputting an alarm sound, for example.

  By outputting this stay alarm, the operator can keep the outlet gate 14k of the discharge chute 12k of the weight rank k closed, and the object 13 to be weighed having an allowable stay number E or more in the discharge chute 12k. Can be grasped. As a result, the operator prepares a new container 15, operates the gate opening switch 19 k of the display operation panel 16 k to open the exit gate 14 k, and removes the object to be weighed 13 with the new container 15. It can be received and accommodated, and the weighing object 13 can be prevented from overflowing from the discharge chute 12k.

  In step n110, in order to determine whether or not the total number of the objects to be weighed 13 having the weight rank k determined in step n102 described above has reached the predetermined number which is the target number, the batch for the weight rank k is used. The process proceeds to a process of examining the value of the number register. Here, assuming that the predetermined number of objects to be weighed per batch, which is the target value of the total number of objects to be weighed in the container 15, is D, first, the value of the batch number register for the weight rank k Is greater than or equal to 0.95 · D, which is a pre-target value smaller than the target value D (step n111).

  When the value of the batch number register for the weight rank k is not 0.95 · D or more, that is, when the value does not reach 0.95D which is the target previous value, prior notification before reaching the predetermined number D 11B, the process proceeds to step n115 in FIG. 11B, and when it is 0.95D or more, the first display lamp 18k, which is the predetermined display display lamp of the display operation panel 16k for the weight rank k, is turned on to perform the work. The person is notified, and the process proceeds to Step n113 (Step n112). By turning on the first display lamp 18k, the operator can know that 95% or more of the predetermined number D is stored in the storage container 15k for the object 13 having the weight rank k. It is possible to grasp in advance that the predetermined number D has been reached, and preparation for replacement of the storage container 15k can be made.

  The pre-target value 0.95D before reaching the predetermined number D, which is the target value, is not limited to 0.95, but can be arbitrarily set by operating the input unit 38 of the display setting unit 35 in FIG. it can. The predetermined number D may be set to a different numerical value for each weight rank.

  In step n113, it is determined whether or not the value of the batch number register for the weight rank k is equal to or greater than the predetermined number D. If it is not equal to or greater than the predetermined number D, it is determined that the predetermined number D has not been reached. The process proceeds to step n115, and if it is equal to or greater than the predetermined number D, it is determined that the predetermined number D has been reached, and the process proceeds to step n114.

  In step n114, the second display lamp 18k, which is a predetermined number arrival display lamp of the display operation panel 16k for the weight rank k, is turned on to notify the operator, and “1” is stored in the predetermined amount arrival sign memory for the weight rank k. "Is set. At the same time, “1” is set in the memory for the weight rank k of the common discharge timer register in each weighing pan S1 to S16, the batch number register for the weight rank k is reset to “0”, and FIG. The process moves to step n115.

  The operator grasps that the predetermined number D of the objects to be weighed 13 is stored in the storage container 15k of the weight rank k by turning on the second display lamp 18k, and replaces the storage container 15k. Before that, by setting “1” in the memory for the weight rank k of the discharge timer register, the outlet gate 14k of the discharge chute 12k of the weight rank k is closed as described later.

  The process of FIG. 11A corresponds to the system state P1, and the weight value of the weighing object 13 of the weighing pan S1 is acquired and the weight rank is determined. However, in the other system states P2 to P16, the weighing target is measured. As shown in FIG. 9, weighing pans S2 to S16 begin to enter and overlap each other at the outer peripheral position 1 in FIG. 1 where the weight value of the object 13 is obtained. In other system states P2 to P16, the weighing pans Instead of S1, the weight values of the objects to be weighed in the weighing pans S2 to S16 are acquired to determine the weight rank, and the processing is executed in the same manner as in FIG. 11A.

FIG. 11B is a continuation of FIG. 11A, and in the system state P1, the object 13 is shaken from the weighing pans S16 to S9 that begin to enter the respective sorting positions (1) to (8) of FIG. processing for driving the gate 6 _{16-6 9} of pan S16~S9 as can be divided, and each distribution position (1) to be weighed are discharged to (8) was 13 discharge gate 12 ₁ It shows a process for activation of the discharge timer for measuring the elapsed time to pass through the exit gate 14 _{1-14 8} 12 _8.

  FIG. 12 shows weighing pans S1 to S16 that begin to enter the sorting positions (1) to (8) of FIG. 1 and completely overlap in each system state P1 to P16.

As shown in FIG. 12, for example, in the system state P1, the weighing pans S16, S15, S14, S13, S12, S11. S10. S9 is each distribution position (1), (2), (3), (4). (5), (6). Since they begin to enter (7) and (8) respectively and completely overlap, these weighing pans S16, S15, S14, S13, S12, S11. S10. Determining the necessity of driving of the gate 6 _{16-6 9} S9.

In the system state P2, the weighing pans S1, S16, S15, S14, S13, S12, S11. S10 is each distribution position (1), (2), (3), (4). (5), (6). Since they begin to enter (7) and (8) respectively and completely overlap, these weighing dishes S1, S16, S15, S14, S13, S12, S11. It is determined whether or not it is necessary to drive the gates 6 _{1 to} 6 _{10 in} S10.

  Similarly, as the system state advances, one weighing pan to be determined is shifted.

Figure 11B, since the processing of the system state P1, determines the necessity of the distribution position (1) to (8) to enter starting to drive the gate 6 _{16-6 9} of pan S16~S9 completely overlap.

  First, as shown in FIG. 11B, the determination process of the memory of the distribution register is performed for the weighing pan S16 which starts to enter the distribution position (1) corresponding to the weight rank 1 and completely overlaps (step n115).

In this determination process, it is determined whether or not the memory for weight rank 1 of the distribution register for the weighing pan S16 is “1” (step n115-1). the weight ranks of the objects to be weighed 13 is a weight rank 1, is set to "1" drive flag Fr _16-1 for driving the air cylinder of the gate 6 ₁₆ for opening and closing the weighing pan S16 (step n115-2 ) To Step n116. When the memory for the weight rank 1 of the distribution register for the weighing pan S16 is not “1”, the weight rank of the object to be weighed 13 on the weighing pan S16 is not the weight rank 1, and the process proceeds to Step n116.

In step n116, the determination process of the memory of the distribution register is performed for the weighing pan S15 which starts to enter the distribution position (2) corresponding to the weight rank 2 and completely overlaps. This determination process is the same as in the case of the weighing pan S16. It is determined whether or not the memory for the weight rank 2 of the distribution register for the weighing pan S15 is “1”. the drive flag Fr _15-2 for driving the air cylinder for the gate 6 ₁₅ opening and closing of the dish S15 is set to "1", when it is not "1", and proceeds to step N117.

In step n117, the determination process of the memory of the distribution register is performed for the weighing pan S14 which starts to enter the distribution position (3) corresponding to the weight rank 3 and completely overlaps. In this determination process, the memory for the weight No. 3 of the distribution register for weighing pan S14 is judged whether or not "1", when it is "1", the air for the gate 6 ₁₄ opening and closing of the weighing pan S14 The drive flag Fr _14-3 for driving the cylinder is set to “1”. If it is not “1”, the process _proceeds to the next step.

In the same manner, in step n122, the determination process of the memory of the distribution register is performed for the weighing pan S9 which starts to enter the distribution position (8) corresponding to the weight rank 8 and completely overlaps. In this determination process, the memory for the weight No. 8 of the distribution register for weighing pan S9, it is determined whether the "1" when it is "1", the air for the gate 6 ₉ opening and closing of the weighing pan S9 The drive flag Fr _9-8 for driving the cylinder is set to “1”. If it is not “1”, the process proceeds to step n123.

  In step n123, the memory of the weight ranks 1 to 8 of the discharge timer register is determined. Specifically, if the flags corresponding to the weight rank-specific memories of the discharge timer register are Ff1 to Ff8, and the contents of the memories of the weight ranks 1 to 8 are “1”, the corresponding flags Ff1 to Ff8 are set to “ 1 ”and the process proceeds to Step n8 in FIG.

  The process of FIG. 11B corresponds to the system state P1, and the memory of the weighing pans S16 to S9 that have completely entered the distribution positions (1) to (8) is determined. In ~ P16, the weighing pan that starts to enter each of the sorting positions (1) to (8) and completely overlaps is the weighing pan shown in FIG. 12 as described above, and therefore the weighing pan corresponding to each system state P2 to P16. Determine the memory.

  In the processing up to step n8 in FIG. 10, that is, the processing from step n7-1 to n7-16, for example, the above clock pulse every 1 msec is used as an interrupt signal, and this interrupt signal is synchronized with the generation of the timing pulse Tp. This is executed at the timing when the system states P1 to P16 are started.

  Steps n8 and n9 in FIG. 10 are repeatedly executed every time the interrupt signal is generated every 1 msec.

In step n8 in FIG 10, the opening and closing operation of the gate ₆₁ through ₁₆ of each weighing pan S1 to S16. FIG. 13 is a flowchart showing details of the process in step n8.

As shown in FIG. 13, processing for driving the gates 6 ₁ to 616 is performed in the order of the weighing pans S _{1 to S 16} .

First, in step n201, it performs processing for opening and closing the gate ₆₁ of the weighing pan S1. Specifically, the drive flag Fr _1-1 for weight rank 1 for driving the air cylinder for the gate ₆₁ open and close the weighing pan S1 is judged whether or not "1" (step n201-1 ), when it is "1", drives the air cylinder for the gate ₆₁ open and close the weighing pan S1 initiates the opening of the gate ₆₁ (step N201-2), in order to measure the operating time of the air cylinder “1” is added to the counter Cr _1-1 (step n201-3).

Next, it is determined whether or not the count value of the counter Cr _1-1 has reached the operating time R (step n201-4). This operation time R is a time interval shorter than the time interval between system states, that is, the time from when a certain system state starts to when it ends.

In step n201-4, when the count value of the counter Cr _1-1 has not reached the operation time R, the process proceeds to step n201-6. The count value of the counter Cr _1-1 is, when it is operating time R is the opening and closing of the gate ₆₁ has been completed, i.e., the counter Cr as the objects to be weighed 13 weight No. 1 from the weighing pan S1 is discharged _1- resets the _first count value, metering drive flag Fr _1-1 dishes S1 is reset to "0", further, resets the memory for the weight No. 1 of the distribution register for pan S1 is "0" Then, the process proceeds to step n201-6 (step n201-5).

Next, in step 201-6, it is determined whether the drive flag Fr _1-2 for weight rank 2 for driving the air cylinder of the gate ₆₁ for opening and closing the weighing pan S1 is "1", The same processing as in the case of weight rank 1 is performed.

Hereinafter Similarly, treated similarly to determine the respective drive flag Fr _1-3 ~Fr _1-8 for weight categories 3-8 for driving the air cylinder of the gate ₆₁ for opening and closing the weighing pan S1.

For the weighing pans S2 to S16, the driving flags (Fr _2-1 to Fr _2-8 ) to (Fr _16-1 to Fr _{16- are} assigned to the weight ranks 1 to 8 in the same manner as the processing n201 for the weighing pan 1. ₈ ) is determined and the same processing is executed (steps n202 to 2016), and the process proceeds to step n9 in FIG.

In step n9 in FIG. 10, processing for closing the exit gates 14 _{1 to} 14 ₈ of the discharge chutes 12 _{1 to} 12 _{8 having} the weight ranks ₁ to ₈ is performed. FIG. 14 is a flowchart showing details of the process in step n9.

  As shown in FIG. 14, processing is performed in order for each of the weight ranks 1 to 8.

  First, processing for weight rank 1 is performed (step n301).

  Specifically, it is determined whether or not the flag Ff1 corresponding to the memory of the weight rank 1 of the discharge timer register is “1” (step n301-1). Since one object 13 is not discharged, the process proceeds to step n302. When the flag Ff1 is “1”, “1” is added to the count value of the counter Cf1 that measures the elapsed time from the time when the object 13 with the weight rank 1 is discharged from the weighing pans S1 to S16 (step n301). -2), it is determined whether the counter Cf1 has reached the set time S (step n301-3).

  Here, the set time S is that the objects 13 having the weight ranks 1 to 8 are discharged from the weighing pans S1 to S16 at the distribution positions (1) to (8), slide down the discharge chute 12, and completely pass through the outlet. The subsequent object to be weighed 13 that is not less than the time required to do this and is distributed to the same distribution position at the shortest interval is set within the time before reaching the outlet of the discharge chute 12.

  The subsequent objects 13 to be distributed to the same distribution position at the shortest interval are, for example, immediately after the object 13 to be weighed in the weighing pan S16 is weight rank 1 and discharged at the distribution position (1). Next, the weighing object 13 of the weighing pan S1 that reaches the distribution position (1) is also of the weight rank 1, and the weighing object 13 discharged from the weighing dish S1 when discharged to the same distribution position (1). Say. This set time S can be set by operating the input unit 38 of the display setting unit 35 of FIG.

Counter Cf1 is, when not in set time S moves to step n302, when the counter Cf1 becomes time setting S is the last of the objects to be weighed 13 as a predetermined number D has passed through the outlet of the discharge chute 12 ₁ as, closing the outlet by driving the air cylinder to close the exit gate 14 ₁ of the discharge chute 12 ₁ for weight rank 1 (step N301-4), resets the flag Ff1 to "0", the counter Cf1 is reset to “0”. At the same time, the memory of weight rank 1 in the discharge timer register is reset to “0” (step n301-5).

Next, the same processing is performed for weight rank 2 (step n302). That is, it is determined whether or not the flag Ff2 of the weight rank 2 is “1”. If the flag Ff2 is “1”, the process from the time when the weighing object 13 of the weight rank 2 is discharged from the weighing pans S1 to S16. “1” is added to the counter Cf2 for measuring time, and it is determined whether or not the counter Cf2 has reached the set time S. When the counter Cf2 becomes time setting S is closed the exit gate 14 ₂ of the discharge chute 12 ₂ for weight classes 2 resets the flag Ff2 to "0", and resets the counter Cf2 to "0". At the same time, the memory of weight rank 2 in the discharge timer register is reset to “0”.

  Similarly, for the weight ranks 3 to 8, processing is performed by determining the flags Ff3 to Ff8.

  In this way, when the objects to be weighed 13 whose total number of objects to be weighed 13 is the predetermined number D are discharged from the weighing pans S1 to S16 to the distribution positions (1) to (8) corresponding to the weight rank. After passing through the outlet of the discharge chute 12 and before the subsequent object 13 reaches the outlet, the outlet gate 14 is closed and the second display lamp 18 is lit as described above. The operator replaces the storage container 15 in which the target predetermined number D of objects to be weighed 13 is stored with the next storage container 15 and operates the gate opening switch 19 to open the closed exit gate 14.

FIG. 15 is a flowchart of the opening operation of the outlet gate 14 of the discharge chute 12. In FIG. 15, the description is applied to the opening operation of the outlet gate 14 ₁ of the discharge chute 12 ₁ of the weight rank 1, but the outlet gates 14 _{2 to} 14 ₈ of the discharge chute 12 _{2 to} 12 ₈ of the weight rank 2 to _8. The opening operation is also processed in the same manner.

First, it is determined whether the gate open switch 19 ₁ of the exit gate 14 ₁ of the discharge chute 12 ₁ for weight rank 1 is turned ON (step N401), when the gate open switch 19 ₁ is turned ON, the weight classes 1 The outlet gate 14 ₁ of the discharge chute 12 ₁ for the engine is opened (step n402), the retention count register for the weight rank 1 is reset to “0” (step n403), and the alarm output is output when the alarm output is ON. Is turned off (step n404), the predetermined amount arrival sign memory is reset to “0”, the first display lamp 17 which is a predetermined number previous arrival display lamp is turned off, and the second display lamp which is a predetermined number arrival display lamp 18 is turned off (step n405), and the process ends.

  In the above-described embodiment, the present invention is applied to a rotary type weight sorter. However, the present invention is not limited to the rotary type, and for example, the weight rank is determined by weighing an object to be weighed with a weighing conveyor, and the weight with a sorting arm at the subsequent stage. You may apply to the conveyance type weight sorter etc. which distribute a to-be-measured item to the distribution position corresponding to a rank.

1 Checkweigher 2 turntable 4 supply conveyor 5 _{1-5 16} load sensor 6 gate 12 discharge chute 14 exit gate 15 container 16 display the operation panel 17 first display lamp 18 second indicator lamp 19 gate open switch 24 central control unit S1-S16 Weighing pan

Claims (4)

A weight sorter that measures the weight of an object to be weighed to determine a weight rank, conveys and distributes the object to be weighed to a distribution position corresponding to the determined weight rank,
Closing means capable of closing a passage through which the objects to be weighed distributed to the distribution position pass;
Setting means for setting a target value of the total amount of the objects to be weighed in the weight rank distributed to the distribution position;
Control means for controlling closing and release by the closing means based on the target value set in the setting means,
The control means cancels the closing by the closing means until the total amount of the objects to be weighed distributed to the distribution position reaches the target value, while the control means releases the objects to be weighed to the distribution position. When the total amount reaches the target value, the object to be weighed passes through a portion of the passage that is closed by the closing means, and is subsequently distributed to the distribution position at the shortest interval. An object closes the passage by the closing means before reaching the closed point ;
After the passage is closed by the closing means, and before the closure is released, an allowable residence amount setting means for setting an allowable residence amount of an object to be weighed that stays in the passage;
A to-be-measured object that stays in the passage includes an allowable staying amount arrival notifying unit that notifies that the allowable staying amount set by the staying amount setting unit has been reached.
A weight sorter characterized by that. The passage through which the objects to be weighed distributed to the distribution position pass is an inclined discharge chute,
The closing means is a gate for opening and closing a discharge port of the discharge chute;
The control means opens the gate until the total amount of the objects to be distributed to the distribution position reaches the target value, while the total amount of the objects to be distributed to the distribution position is When the object reaches the target value, the object to be weighed passes through the discharge port of the discharge chute and the subsequent object to be distributed to the distribution position at the shortest interval is transferred to the discharge chute. Before reaching the outlet, closing the gate,
The weight sorter according to claim 1. A pre-target value setting means for setting a pre-target value that is smaller than the target value;
A pre-target value arrival informing means for informing that the total amount of the objects to be weighed distributed to the distribution position has reached the pre-target value;
The weight sorter according to claim 1 or 2. Provided in the vicinity of the passage with an operating portion operated to release the closing of the passage by the closing means,
The weight sorter according to any one of claims 1 to 3.

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