JPS60218038A - Weighing and bagging device for grain - Google Patents

Abstract

PURPOSE:To correct an error in weighing due to variation in the amount of grains which flow through the grain downfall distance of a weighing device and improve the accuracy of the weighing of a bag body of polished rice by correcting an operation signal from a weight measuring part which opens and closes an on-off valve with the measurement signal of the volume weight of sample grains. CONSTITUTION:Polished rice which falls down from a supply port part 4 enters a supply tank 5 and part of it falls down in a branch flow passage 30 to enter the weighing container 25 of a capacity weight measuring machine 24; and a volume weight measuring part 29 measures the volume weight of a specific volume of polished rise, and its measurement signal is inputted to a control circuit 33. Grains put in the supply tank 5, on the other hand, flow down in a weighing tank 12 through the on-off valve 11 with a control signal from the control circuit to measure the weight by a weight measuring part 16, whose measurement signal is inputted to the control circuit 33. Then, the measurement signal from the weight measuring part 16 provided to the weighing tank 12 is corrected with the measurement signal from the volume weight measuring part 29 to store grains in the measuring tank 12 to accurate specific weight.

Description

[Detailed description of the invention] The present invention relates to improvements in grain weighing and bagging equipment.

Supplying the grains discharged from an on-off valve provided in a supply tank to a measuring tank provided at a lower part, and operating the on-off valve to open and close it in response to a measurement signal from a weight measuring section provided in the measuring tank,
In a weighing and bagging device that bags grains of arbitrary predetermined weight weighed in a weighing tank, an on-off valve provided in an upper supply tank is operated to open and close in response to a measurement signal from a weight measuring section provided in the weighing tank. In addition, depending on the length of the grain flow distance between the discharge valve installed in the upper supply tank and the lower weighing tank, a valve based on experimental values is installed in the setting device installed in the weight measuring section. The control weight setting value (for example, when bagging 30 to 9 grains, the setting value corresponding to 29.8 kl) is set to ensure weighing accuracy, but the rice milling equipment The volumetric weight of regular polished rice that has been milled and ultra-shiny polished rice that has been polished to remove bran by humidifying the rice grains using a humidifying rice milling device is 5 to 10% due to differences in the smoothness of the surface of the rice grains, the moisture content of the rice grains, etc. As a result, the amount of grain flowing through the granule flow path of the weighing device increases or decreases, which often causes measurement errors.

The present invention addresses the above points and provides a W/all! By communicating the valve opening/closing actuating device to the volumetric weight measuring device via a control circuit, the actuation signal from the weight measuring unit that closes the opening/closing valve is corrected by the measurement signal of the volumetric weight of the sample grain. The change in grain amount within the grain flow distance described above is matched with the change in discharge amount due to correction of the opening/closing signal of the discharge valve based on the measured volumetric weight of the sample. The purpose of the present invention is to develop and provide a high-performance grain weighing and bagging device that eliminates the drawbacks and reliably mass-produces bags of highly precisely weighed polished rice.

The present invention will be explained with reference to embodiment figures. The figure shows a grain weighing and bagging device which is integrally formed by providing a grain weighing device 1 in the upper part and a grain bagging device 2 in the lower part.

The grain weighing device 1 includes a funnel-shaped supply tank 5 provided at a lower position of a supply port 4 provided in an earthen wall of a box-shaped machine frame 3, and is suspended and fixed from an upper horizontal rod 6 to supply grains. At the outlet of the tank 5, an on-off valve 11 consisting of a large injection valve 9 and a small injection valve 10 each equipped with an opening/closing device such as a solenoid is provided.
A funnel-shaped meter tank 12 is provided at a lower position of the supply tank 5, and a load cell 15 is interposed between a bracket 13 provided on the tank 12 and a lower crossbar 14 to measure grains in the tank. A weight measurement section 16 and an automatic discharge valve 17 are provided at the discharge port of the weighing tank 12.

The grain bagging device 2 includes an opening suction device 18 located below the discharge port of the measuring tank 12 that sucks and opens the opening of the package for bagging grains, and an opening suction device 18 that seals the opening of the package. A sealing device 19 is provided, and a bag base 20 on which the packages are placed is provided below the sealing device 19, and a heavy body delivery device 21 for the packages is provided on the side thereof, so that the packages are continuously fed by a delivery roll 22. 23 is a bag body outlet for taking out the bagged body on the base 20.

Next, the volumetric weight measuring machine 24 has a small weighing capacity 125 equipped with the same ** as the weighing tank 12 placed on the lower side of the earthen wall of the machine frame 3, and is suspended by a hanging rod 26. Applicable! I2
A plurality of load cells 28 are interposed between the mounting brackets 27, 27 provided on both sides of the container 11 and the hanging rod 26.
25 is a volume for measuring the volumetric weight of the sample grains supplied. A measurement section 29 is formed, 30 is a sample branch flow path provided in the supply port 4, and 31 is a switching valve provided in the branch flow path 30. , 32
is the measuring capacity! 125 automatic discharge valve. Each opening/closing actuating device 7.8 connected to the large input valve 9 and the small input valve 10 of the opening/closing valve 11 is connected to the volumetric weight measuring device 24 via a control circuit 33, and the control circuit 33 includes ( (See Figure 2)
The measurement signal from the weight measuring section 16 provided in the weighing tank 12 is branched and inputted to the comparator 34 on the large injection valve 9 side and the comparator 135 on the small injection valve 10 side, respectively, and each measurement signal is sent to the variable setting device 36. 37, and the corresponding signals actuate the solenoids provided in the opening/closing actuators 7.8 to close the large and small closing valves 9.
. In addition, the selection of the weight setting value is based on volumetric weight measurement l.
Alternatively, the measurement may be performed using a measurement signal from a volumetric weight measurement section 29 provided in the II 24. Then, the variable setting device 36
29 when bagging grains with multiple weight settings (for example, 30kl) to compensate for the closing of the large input valve 9.
．． Oko, 29.2kQ, 29.4kL 29.6
The variable setting device 37 has a plurality of weight setting values (for example, when bagging 30 kQ of grain, 29 ．．
6kQ, 29.7kQ, 29.8kQ, 29.9
(voltage, etc. corresponding to 9) are set respectively. Therefore, the signals measured by the volumetric weight measuring unit 29 of the volumetric weight measuring unit 124 are used to select each variable setting 1 through a selection means such as a variable resistor.
36. At the same time, each of the weight setting values set in 37 is selected, and the measurement signal from the weight measurement unit 16 provided in the weighing tank 12 is corrected using the selected setting signal, and the large injection valve 9 is activated by the corrected operation signal. Since the large input valve 9 and the small input valve 10 are respectively closed, the grains in the supply tank 5 are discharged in large quantities by opening the large input valve 9, and the measured weight is adjusted to the set weight value of the variable setting device 36 (for example, 29, When the weight reaches 0ko), the large injection valve 9 closes and the small injection valve 10 opens, discharging a small amount until the weight reaches the set weight value (for example, 29.7 kg) of the variable setting device 37. After closing, the weighing tank 12 stores grains having an accurate predetermined weight without any measurement error.

With the above configuration, when bagging polished rice, the polished rice discharged from the rice milling machine is connected by appropriate means so as to flow into the supply port 4, and the 6 valves are opened and closed as appropriate. When the device is started, the grains (polished rice) flowing down from the supply port 4 flow down into the supply tank 5 and accumulate therein, and some of the sample grains flow down the branch flow path 30 to measure the volumetric weight of 1 m24. When a predetermined period of time has elapsed, the switching valve 31 of the branch flow path 30 is activated to open the flow path.

During this time, the grains in the weighing container 25 form an angle of repose at the top of the container 25 and accumulate, and the surplus grains cover the upper surface of the grain layer by 8
A predetermined volume of grains that have flowed down into the lower supply tank 5 and formed an angle of repose have their volumetric weight measured by a load cell 28 provided in a volumetric weight measuring section 29, and the measurement signal is sent to a control circuit 33. is input.

On the other hand, the grains accumulated in the supply tank 5 are activated by the control signal from the control circuit 33 and the opening/closing actuator 7 is operated to open the large input valve 9, so that the grains flow down to the lower measuring tank 12 and are accumulated. Load cell 1 installed in measurement l516
5, the grain weight is measured, and the measurement signal is input to the control circuit 33. The measurement signal from the weight measurement unit 16 input to the control circuit 33 is branched and sent to the comparator 3 on the large input valve 9 side.
4 and the comparator 35 on the small injection valve 10 side, respectively. In addition, the measurement signal of the volumetric weight measuring section 29 is generated by selecting each weight setting value set in each variable setting device 36, 37 as described above, and using the selected setting signal, the weight measuring section provided in the weighing tank 12 Since the measurement signal from 16 is corrected and the corrected operation signal closes the large injection valve 9 and the small injection valve 10 in a related manner, the measuring signal 11
! The above-mentioned change in grain amount within the grain flow distance, which is the factor of I, matches the discharge amount based on the volumetric weight measured by the sample. Grain of a certain exact predetermined weight is stored in the weighing tank 12. When the automatic discharge valve 17 is opened, the grains weighed to a predetermined weight in the weighing tank 12 flow down and accumulate in the packaging placed on the lower base, and the opening of the packaging is sealed to collect the grains to a predetermined weight. It is formed into a bag and taken out of the machine to be sent to the next process.

In addition, in order to correct the opening/closing operation signal of the opening/closing valve according to the volumetric weight, other than the configuration shown in the example, it is possible to adjust the contact time of the opening/closing valve, or by moving the weight position of the measuring rod. A suitable selection of general adjustment means is used. Also,
Regarding the correction of the on-off valves, there are cases in which the large injection valve 9 and small injection valve 10 are each corrected, and cases in which only the small injection valve 10 is corrected.

In this way, the grain weighing device of the present invention corrects the operation signal from the weight measurement unit provided in the weighing tank that closes the on-off valve based on the measurement signal of the voluminous weight of the sample grain. The change in the amount of grain within the grain flow distance, which is the cause of weighing errors, and the change in the discharge amount due to the correction of the opening/closing signal of the discharge valve based on the volumetric weight of the sample are the same, so the conventional device described above is In addition to being able to eliminate the drawbacks, the simple structure makes it possible to automate the adjustment of the discharge amount of each stacked grain whose volumetric weight changes, and it has the effect of reliably mass producing bags of grains weighed with high precision. It is something.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. FIG. 1 is a side sectional view of this device, and FIG. 2 is a circuit diagram of the main part of its control circuit. 1... Grain weighing device 2... Grain weighing device 3...
Box-shaped machine frame 4... Supply port section 5... Supply tank 6... Upper horizontal rod 7... Opening/closing actuator 8... Opening/closing actuating device 9... Large input valve 10
...Small input valve 11...Opening/closing valve 12...Measuring tank 13...Bracket 14...Lower horizontal rod 15...
・Load cell 16... Weight measuring section 17... Automatic discharge valve 18... Opening suction device 19... Sealing device I
20... Bag base 21... Heavy body delivery device 22.
...Feeding roll 23...Bag body outlet 24...Volume weight measuring device 25...Measuring container 26...Hanging rod 27...Mounting fittings 28...Load cell 29...
Volumetric weight measuring section 30...branch flow path 31...switching valve
32... Automatic discharge valve 33... Control circuit 34...
Comparator 35... Comparator 36... Variable setting device 37.
...Variable setting device patent applicant Satake Seisakusho Co., Ltd. Figure 1

Claims (1)

[Claims] (1) Supplying the grains discharged from the on-off valve of the supply tank to a measuring tank provided at the bottom, and operating the on-off valve to open and close it in response to a measurement signal from a weight measuring section provided in the measuring tank;
In a weighing and bagging device for bagging grains of an arbitrary predetermined weight weighed in a measuring tank, an opening/closing device for an on-off valve of the supply tank is connected to a volumetric weight measuring machine via a control circuit, and A grain weighing and bagging device that corrects and issues an operation signal from the weight measurement unit that closes the on-off valve based on a volumetric weight measurement signal. (2) The grain weighing and bagging apparatus according to claim (1), wherein the on-off valve is constituted by a large input valve and a small input valve.