JPH07318403A - Flow quantity display device for grains measuring and sorting device - Google Patents

Abstract

PURPOSE:To enable the measurement of the only flow quantity in the steady flow-out condition without providing a sensor or the like by stopping the measurement of the flow quantity when the increasing weight per a unit time exceeds a prescribed value or when the measurement value achieves the predetermined value just before the set weight value. CONSTITUTION:A sorting net cylinder 4 and a spiral body 5 are driven by a motor 3 so as to enable the measurement of flow quantity. Unpolished rice flows out of a supplying hopper 6, and the broken grains are eliminated during flowing down a spiral way 5. The aligned unpolished rice 9 is fed to a grains tank 9, and filled in a package bag 33 from an outlet 13. At this stage, the measurement display of weight and the measurement of flow quantity are started. In this case, flow quantity is measured on the basis of the weight change DELTAW per a constant time DELTAt, but the display is not performed at the first cycle after starting the measurement. At the only time when the value of DELTAtXDELTAW is less than 3.0, display is performed as the display of the flow quantity measured at this time. Furthermore, when the weight measurement value achieves the predetermined value just before the set value, the measurement of flow quantity is stopped. As a result, the display of the measurement in the only ordinary flow-out condition can be performed without providing a sensor or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain weighing and sorting machine that sorts and packs grains such as rice and wheat according to their grain thickness, and more particularly to a flow rate display device in the grain weighing and sorting machine.

[0002]

2. Description of the Related Art Conventionally, in a grain weighing and sorting machine, which is the final step of a hulling / preparation work, the throughput of the grain supplied from the hulling machine of the previous step (hereinafter, synonymous with flow rate or efficiency). What measures and displays is known. For example, (a) a grain sensor for detecting whether or not grains are clogged (= accumulated) in the tank, and a limit switch for detecting opening / closing of a shutter at the lower end of the tank are provided, and the grain sensor is "A state where the grain is not clogged"
Is detected and the limit switch detects the "shutter open state", the "state in which grains supplied from the huller are flowing smoothly" is calculated, and the weight increase amount at this time is calculated. Japanese Patent Application Laid-Open No. 1-47324 discloses that the work efficiency is calculated and displayed. Also,
(B) Whether the discharge state (large flow rate) immediately after opening the shutter is determined based on whether the flow rate is larger than a certain value (for example, 3000 kg / h), and the opening / closing of the shutter is detected by a limit switch, etc. However, there is a special feature that calculates the flow rate per unit time when the shutter is fully opened and it is not immediately after the shutter is opened (the state where grains are not stored in the tank) and outputs this data to the display device. It is shown in Kaihei 2-26684.

Thus, in order to measure the throughput in the grain weighing and sorting machine, that is, the efficiency in the huller,
It is necessary that the grains (brown rice) discharged from the huller flow smoothly in the grain weighing and sorting machine. Therefore, after each weighing, the shutter closes and the grains are temporarily put into the grain weighing and sorting machine. The state where the grains are accumulating, the state where the shutter is opened after the tare is exchanged, and the grains temporarily accumulated in the grain weighing and sorting machine are flowing out at a large flow rate, and further,
The large flow shutter closes before the measured set value, and when the grain is flowing out from the small dose shutter at a small flow rate, that is, when the grain flow is not steady, the flow rate is excluded as an abnormal value. Is being done.

[0004]

By the way, in the prior arts (a) and (b), the grain detection sensor sends a signal from the shutter limit switch or relay to determine whether or not the flow rate is steady. Although it is performed by detecting, not only the manufacturing cost increases, but there is also a possibility that it may cause misjudgment due to a malfunction of these detection sensors at the time of use.

In view of the above problems, the present invention determines the steady outflow state without specially providing sensors, measures and calculates only the flow rate in the steady outflow state, and the flow rate in a grain weighing and sorting machine can be displayed. It is a technical object to provide a display device.

[0006]

In order to solve the above-mentioned problems, the present invention relates to a grain selection section, a grain tank provided above the grain selection section, a shutter provided at a discharge port of the grain tank, and the shutter. In a grain weighing and sorting machine comprising a driving means, a weighing instrument arranged below the shutter, a display section for displaying the weight detected by the weighing instrument, and a weighing setting switch, The flow rate is measured and calculated from the increased weight of No. 1 and output to the display unit, and the flow rate is measured when the increased weight exceeds a certain value or the measured value reaches a predetermined weight value before the set measured value. Provide an arithmetic circuit that does not execute arithmetic
The technical means is provided.

Further, the arithmetic circuit displays the previous measured / calculated value when the increased flow rate exceeds the constant value and until the measured value reaches the predetermined weight and becomes 0 or the predetermined weight. It may be formed so as to output to a unit.

[0008]

As shown in FIG. 4, there are eight types of weight changes detected by the measuring instrument. This will be described with reference to the weight change simulation graph of FIG. That is, is a state in which there is no weight change and the supply from the hulling machine in the previous step is stopped, and a indicates a state in which the rate of weight change is rapidly increased, and the tare including the bag stand metal fitting. When placed on a weighing instrument,
Indicates that the weight change rate is almost constant, a indicates that the weight change rate is relatively small, and indicates the initial operation state of the huller.
b is the case where the huller is in a steady operation state,
c is a state in which the rate of change in weight is smaller than that of a, the case where the shutter for large injection is closed and discharge is performed by the shutter for small injection, and d is the slight change in weight in a and b, This is the case when there is a change in the amount discharged from the chaffing machine or a change in the sorting rate of the sorting section of the grain weighing and sorting machine. In the case of completion or when the supply from the huller has stopped, shows the state where the weight increase rate suddenly becomes negative and becomes 0, and when the weighed tare is dropped from the weighing machine, b Is a state in which the rate of change in weight is further increased than in a, and the grains accumulated in the grain tank while the tare is replaced are discharged at a large flow into the tare all at once by fully opening the shutter, In Figure 4, the weight suddenly stood A rising manner increasing state, this is the case, for example, when the bag filled with grain was placed on the weighing instrument.

Then, the increased weight per unit time (for example, 2 seconds) for judging each of these forms, that is,
The weight increase rate S is the unit time Δt × the weight increase Δw during that period.
The weight increase rate S measured and calculated at constant time intervals (for example, 2 seconds) is a constant value ( For example, in the case of 3) or more, the previous flow rate display is retained.

Further, when the predetermined weight value before the set weight value input by the weight setting switch, for example, 2 kg before is reached, the subsequent measurement / calculation and display are not executed, and the flow rate display is fixed. Leave it alone. The predetermined weight value may be the same as a time point (for example, 1.5 kg before the set weighing value) or a time point (larger value) earlier than the time point at which the large injection shutter is closed and only a small injection is performed. The flow rate display is fixed as it is until the tare is lowered from the weighing machine and the weight becomes 0 or a predetermined weight, for example, 2 kg, and the next measurement / calculation is restarted.

As a result, the flow rate is measured / calculated and displayed only in the a, b, and d states, that is, when the flow is steady, and the flow rate is not measured / calculated and displayed in other states.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes the whole grain weighing and sorting machine, in which a vertically long box-shaped case 2 is provided with a sorting net cylinder 4 rotatably driven by a motor 3, and the sorting net cylinder 4 and The spiral body 5 rotating in the same direction and at a relatively high speed is provided, and the supply hopper 6 is provided above the spiral body 5 so that the grains flow down between the spiral body 5 and the sorting net cylinder 4. . A pair of openings 7 are provided on both upper side walls of the supply hopper 6, and one of the openings 7 faces a brown rice discharge gutter (hi) of a huller (not shown). Further, above the opening 7, a grain tank 9 is formed by being partitioned by the inclined bottom wall 8. A part of the grain tank 9 is a cover body 10 made of transparent or translucent resin and is formed so that the grain in the tank 9 can be observed. Also,
On the front side of the grain tank 9, an operation panel 12 having a display unit 11 is mounted, and a shutter 14 for opening and closing a discharge port 13 at the lower end, which is made up of a large amount and a small amount, is provided.
A lever 15 for opening the shutter 14, a locking piece 16 for locking the shutter 14 in the open state, and the locking piece 1.
6 is provided with a shutter drive means including a solenoid 17 for releasing the engagement between the shutter 6 and the shutter 14.

On the other hand, an annular sizing gutter 18 is provided near the lower end of the spiral body 5, and the sizing gutter 1 is provided.
8 is provided with a sizing and squeezing blade 19 for scraping out the sizing, and an annular waste grain receiving trough 20 for receiving the waste particles leaking from the sorting net cylinder 4, and the waste particles in the waste grain receiving trough 20. A scrap grain scraping blade 21 is provided, and the scrap grain receiving gutter 20 is connected to a waste grain discharging gutter 22 through an upright dust particle screw (not shown), and the size regulating gutter 18
Is connected to the grain tank 9 via a bucket elevator 23.

The weighing device 24 for detecting the weight is the outlet 1
It is arranged under the control unit 3 and is connected to the operation panel 12 by a cable or optical communication means (not shown). That is,
Load cell 25 built in the weighing machine 24 (see FIG. 2)
Is connected to an arithmetic circuit 27 composed of a one-chip microcomputer via an A / D converter 26, and a measurement setting switch 28 and a motor ON / OF switch are provided on the input side of the arithmetic circuit 27.
The F switch 29 is connected, and the output side thereof has a display unit 11 including a weight display unit 30 and a flow rate display unit 31.
Are connected. The arithmetic circuit 27 is also electrically connected to the solenoid 17.

Next, the specific operation of the above embodiment will be described with reference to the flow chart of FIG.
When the power is turned on, initialization for checking the display unit 11 and the like is performed, and the flow rate display unit 31 displays “0”. The desired weight, for example 30.5, is set by the weighing setting switch 28.
When a weight obtained by adding 1.83 kg of the tare weight to kg is set and subsequently the motor ON / OFF switch 29 is turned ON, the sorting net cylinder 4, the spiral body 5 and the bucket elevator 23 are set.
Is driven, whereby the flow rate can be measured and calculated (when the motor 3 is not driven, that is, when the grain is not flowing, the flow rate is not displayed even if the weight increases). .

The packaging bag 33 supported by the bag stand fitting 32 is placed on the weighing device 24, the shutter 14 is opened by the lever 15, and the open state is held by the locking piece 16. The brown rice discharged from the brown rice discharge gutter 34 of the huller (not shown) flows in from the supply hopper 6 and is sequentially pushed down by the spiral body 5 while being pressed against the sorting net cylinder 4 by the centrifugal force. Brown rice having a grain thickness smaller than that of the slits leaks from the slits, falls into the waste grain receiving gutter 20, and is taken out of the machine from the waste grain discharging gutter 22. On the other hand, the sized brown rice is fried from the sized gutter 18 through the bucket elevator 23, and discharged from the outlet (not shown) of the bucket elevator 23 onto the inclined bottom wall 8 of the grain tank 9, The slanted bottom wall 8 slides and is filled from the outlet 13 into the packaging bag 33.

Thus, when brown rice begins to be put into the packaging bag 33, the weight signal from the load cell 25 is taken into the arithmetic circuit 27 via the A / D converter 26, and the weight display unit 3
The measured value is displayed as 0 at every moment, and the flow rate measurement is started. That is, it is determined whether or not there is a weight change at regular intervals (Δt), for example, every 2 seconds, and if there is a weight change (Δw), the flow rate is measured / calculated and displayed. It is formed so that the eyes (2 seconds) are not displayed. As a result, the tare (bag stand metal fitting 32 + packaging bag 33)
It is possible to prevent the weight change from being displayed when the device is placed on the device (a in the figure) or when the device is immediately placed after the tare is installed. For this purpose, the flow rate may not be displayed until a certain weight such as 3 kg or 5 kg after the start of weighing.

The flow rate (kg / h) is measured and calculated from the increased weight (Δw) during a fixed time (Δt = 2 seconds). At this time, the value of Δt × Δw S (kg · sec) Is calculated, and is displayed as the current measured flow rate only when the condition of “S <3.0” is satisfied. Therefore, at the time of a, the S value becomes very large (S = 4), and therefore the tare scale 24 is also used under the condition of “S <3.0”.
The change in weight when placed on will be canceled.

Next, since S = 1.0 in the case of a in the figure, for example, the flow rate is displayed as "900 kg / h" or / and "15 bales", and in the case of b, S = 2. Becomes 0,
The flow rate is displayed as "1,800 kg / h" or "30 bales". In this way, the flow rate is measured and calculated every 2 seconds and displayed, but when the weight measurement value reaches a predetermined weight before the set measurement value 32.33 kg, for example, 30.33 kg before 2.0 kg, the flow rate is reached. The previous flow rate is displayed as it is on the flow rate display unit 31 without executing the measurement and calculation of. As a result, even if the large closing shutter 14 closes 1.5 kg before the set weighing value and enters the small closing state (c), the flow rate at this time is canceled and the previous flow rate is displayed as it is.

When the small-loading shutter is closed and the weighing is completed (), the packaging bag 33 filled with brown rice is unloaded from the weighing machine 24 (), and the weight display becomes 0 ().
When the weight becomes 0, the tare is placed on the weighing device 24 again (the weight change is canceled), and the shutter 14 is fully opened. As a result, the flow rate can be measured and calculated, but at this time, the brown rice temporarily accumulated in the grain tank 9 flows out at a large flow rate (b, S = 6.6).
Due to the condition of "3", the flow rate at this time is not measured / calculated and displayed, and the previous display value remains.

When the brown rice accumulated in the grain tank 9 is discharged and only the brown rice supplied from the huller starts to be discharged (a), the increased weight meets the condition of "S <3",
Starts flow rate measurement and calculation, and displays the flow rate each time. Then, it measures and calculates every 2 seconds up to 2.0 kg before the set measured value and displays it on the flow rate display unit 31.

[0022]

As described above, according to the present invention, the flow rate is measured and calculated when the increased weight is a certain value or more or when the measured value reaches a predetermined weight value before the set measured value. Since I did not do so, even if no sensors are provided,
It is possible to measure and calculate and display the flow rate by determining when the grain supplied from the hulling machine in the previous process is flowing without any stagnation, that is, when the grain flow is in a steady state, The production cost is not increased, and the abnormal flow rate is not displayed due to the malfunction of the detection sensors.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a grain weighing and sorting machine according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an arithmetic circuit of the above.

FIG. 3 is a flowchart showing a control operation of the above.

FIG. 4 is a graph showing various forms of weight change.

FIG. 5 is a simulation graph of weight change detected by a weighing machine.

[Explanation of symbols]

 1 Grain weighing and sorting machine 2 Case 3 Motor 4 Sorting net cylinder 5 Spiral body 6 Supply hopper 7 Opening 8 Sloping bottom wall 9 Grain tank 10 Cover body 11 Display unit 12 Operation panel 13 Discharge port 14 Shutter 15 Lever 16 Locking piece 17 Solenoid 18 Grain size gutter 19 Grain squeezing blade 20 Waste grain gutter 21 Waste grain Scraping blade 22 Waste grain discharge gutter 23 Bucket elevator 24 Meter 25 Load cell 26 A / D converter 27 Arithmetic circuit 28 Metering setting switch 29 Motor ON / OFF switch 30 Weight display section 31 Flow rate display section 32 Bag stand metal fitting 33 Packaging bag

Claims (2)

[Claims] 1. A grain selection unit, a grain tank provided above the grain selection unit, a shutter provided at a discharge port of the grain tank and the shutter driving means, and a weighing device provided below the shutter. In a grain weighing and sorting machine having a display unit for displaying the weight detected by the weighing machine and a weighing setting switch, the weight increase per unit time is below a certain value, and the weighing value. Is less than or equal to a predetermined weight value before the set weight value, a grain weighing and sorting machine provided with an arithmetic circuit for measuring and calculating the flow rate from the increased weight and outputting the flow rate to the display unit. Flow display device in. 2. The arithmetic circuit is set to 0 when the increased flow rate exceeds the constant value and after the measured value reaches the predetermined weight.
Alternatively, the flow rate display device in the grain weighing and sorting machine according to claim 1, wherein the previous measured / calculated value is output to the display unit until the predetermined weight is reached.