JPH07159228A - Automatic weighing system - Google Patents

Abstract

PURPOSE:To realize optimal weighing of diversified commodities easily by providing means for storing the control condition set values of a plurality of items having different target weight. CONSTITUTION:Items including the target weight of an object to be weighed are inputted by an input means (ten keys) 50. An operating means (CPU) 54 reads out control condition set values of a plurality of weights close to the target weight from a memory means 52 depending on the target weight of the object to be weighed inputted by an operating means (CPU) 54. The control condition set values of the target weight are then operated based on a plurality of stored control condition set values. A control means 56 controls the driver group 60 at each part based on the control condition set value operated by the CPU 54 and latched by a latch circuit 58. The control conditions are set according to the item and target weight and a reservation register number is affixed. When the reservation register number is inputted by the ten keys 10, automatic weighing is carried out according to stored control conditions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic weighing device for weighing an object to be weighed under predetermined control conditions suitable for its type.

[0002]

2. Description of the Related Art In recent years, weighing devices using electronic circuits have become the mainstream in weight detection devices. One example is a computer controlled combination weighing device.
In this combination weighing device, the objects to be weighed sent from the supply conveyor are collected in the dispersion feeder and dispersedly supplied to the radiation feeder by the vibration of the dispersion feeder. Next, the objects to be weighed are also sent to the pool hopper by the vibration of the radiation feeder, temporarily pooled in accordance with the weighing operation, and then loaded by the weighing hopper. The drive weighing unit measures the weight of the weighing object put into the weighing hopper. The object whose weight has been measured is discharged from the discharge chute.

Generally, in the case of automatically weighing an object to be weighed, it is necessary to set a predetermined control condition suitable for each item (article name, target weight, etc.) of each part of the weighing device. For example, in the product name “Potato chips”, the target weight W _{1 for} the small capacity type a and the target weight W for the medium capacity type b
_2, when there is the type of the target weight W ₃ of the large capacity type, it is necessary to change the setting of various control conditions of the metering device each part for each target weight.

The control conditions in this case include, for example, the control amount when the feed conveyor is charged into the dispersion feeder, the amplitude intensity and time of the dispersion feeder and the radiation feeder, the operation delay time of the pool hopper and the weighing hopper, and the weighing hopper. There are differences in the time of discharge. In this way, the set value of each control condition suitable for the target weight is determined and optimally weighed.

Conventionally, an automatic weighing device has been used in which each control condition suitable for the product name and the target weight is preset.

[0006]

However, the conventional device has the following problems. In order to weigh multiple products with different capacity, it is necessary to set conditions for each new target weight. However, as described above, since there are many condition values to be set, the setting work becomes complicated. As a result, it becomes difficult to properly set the control conditions, and there is a problem that the device capacity cannot be fully exhibited.

Further, due to recent diversification of products, there is a demand for the appearance of an automatic weighing device that can more easily set conditions when it is necessary to increase the types of products.

An object of the present invention is to solve the above-mentioned problems and to provide an automatic weighing apparatus capable of easily realizing optimum weighing of the object to be weighed according to the diversification of products.

[0009]

In order to achieve the above object, an automatic weighing apparatus according to claim 1 of the present invention is a weighing machine for weighing an object to be weighed under a predetermined control condition adapted to an item including a target weight thereof. The device is an input means for inputting an item of the object to be weighed, a storage means for storing control condition setting values for a plurality of items having different target weights, and a target weight among the items input from the input means. Based on this, the stored control condition set values for a plurality of target weights close to the target weight are read out from the storage means, and the control conditions for the target weight are read out based on the read out plurality of stored control condition set values. The control unit controls the control system of the weighing device based on the control condition set value of the target weight calculated by the calculation unit.

[0010]

According to the automatic weighing apparatus of the first aspect, the calculating means is adapted to the item including the inputted target weight of the object to be weighed.
The stored control condition set values for the plurality of target weights close to the target weight are read from the storage means, and the control condition set values for the target weight are calculated based on the plurality of stored control condition set values. Therefore, only by inputting the item including the target weight of the object to be weighed, it is possible to automatically set the control condition setting value that matches the item of the object to be weighed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic side view of an automatic weighing apparatus according to an embodiment of the present invention. This device is equipped with a supply shoe 2,
A dispersion feeder 4, a radiation feeder 6, a pool hopper 8, a weighing hopper 10, a driving and weighing unit 12, a discharge chute 14, a main body frame 16, and an operation panel 18 are provided. A CPU incorporated in the operation panel 18 controls the entire device.

The object to be weighed sent from a supply conveyor (not shown) is dispersed and radiated by the vibration of the dispersion feeder 4 and the radiation feeder 6 via the supply chute 2, and is sent to the pool hopper 8 to be temporarily pooled. , Weighing hopper 10
Be thrown into. The drive weighing unit 12 measures the weight of the object to be weighed that has been put into the weighing hopper 10. The object whose weight has been measured is discharged from the discharge chute 14.

FIG. 2 is a block diagram showing the basic configuration of the signal processing system of the automatic weighing apparatus according to the embodiment of the present invention. The operation panel 18 includes an input unit (numeric keypad) 50, a storage unit (memory) 52, a calculation unit (CPU) 54, and a control unit (CPU) 56. The input means (numeric keypad) 50 inputs an item including the target weight of the object to be weighed. The calculation means (CPU) 54 reads the stored control condition set values for a plurality of target weights close to the target weight from the storage means (memory) 54 according to the input target weight of the object to be weighed, The control condition set value for the target weight is calculated based on the plurality of stored control condition set values. The control means (CPU) 56 is an arithmetic means (CPU)
Based on the control condition set value calculated by 54 and latched by the latch circuit 58, the driving machine group 60 of each unit is controlled by causing the dispersion feeder 4, the radiation feeder 6 to vibrate, or opening and closing each hopper.

In this embodiment, the product name "potato chips"
In the target weight W ₁ of a small capacity type a, target weight W ₂ of medium capacity type b, data of a control condition setting value type of the target weight W ₃ of the large capacity type c is already in the storage means (memory) 52 It is remembered (reservation registration). An example of this reservation registration is shown in FIG. As shown in this figure, in this device, each control condition is set according to the product name and the target weight, and the reservation registration number is given to each product name and the target weight. Therefore, normally, when the reservation registration number is input by the input means (numeric keypad) 50, automatic weighing is performed according to the control condition stored by the reservation registration number.

The control conditions include, for example, the target weight W ₁ (reservation registration number 1) of the small capacity type a and the target weight W ₁
Corresponding to the upper limit value α ₁ , feeder adjustment for setting the amplitude strength B ₁ and time BT ₁ of the dispersion feeder 4 and the radiation feeder 6, and feeder time magnification β ₁ for setting the magnification time of the dispersion feeder 4 and the radiation feeder 6 , The hopper timing HT ₁ for setting the operation delay time of each hopper so that the goods smoothly move between the pool hopper 8 and the weighing hopper 10, the nature of the goods, the target weight, the specifications of the packaging machine, etc. In consideration of the above factors, the time lag discharge time DT ₁ for setting the time difference discharged from the weighing hopper 10, the control amount when the weighing machine controls the supply conveyor and puts the article into the dispersion feeder 4 is set. Dispersion feeder supply weight FW ₁ and the like. Similarly, each control condition is registered for the target weight W ₂ (reservation registration number 2) of the medium capacity type b and the target weight W ₃ (reservation registration number 3) of the large capacity type c.

When the item name and target weight of the object to be weighed, that is, the item matches the item registered for reservation, the control condition is set by the contents of the reservation registration as in the conventional case. Next, the operation of setting the control condition when the item of the item to be weighed is not registered for reservation will be described based on the flowchart shown in FIG.

First, the product name and the target weight are input by the numeric keypad 50 (step S1). For example, assume that the target weight W _O (W ₁ <W _O <W ₂ ) is input with the product name “Potato chips”. Then, the arithmetic unit (CPU) 54, the storage unit (memory) 52 near the target weight W _O under the name "potato chips" stored, and the light small capacity type a than W _O of the target weight W ₁ The control condition set value data is read (step 2). Then, the target weight W _{2 of the} medium capacity type b close to the target weight W _O and heavier than W _O
The control condition setting value data is read (step S3).

Next, the calculation means (CPU) 54 calculates the control condition set value of W _O based on the control condition set values of the target weights W ₁ and W ₂ (step S4). For example, assuming that the amplitude intensity of the dispersion feeder 4 and the radiation feeder 6 of the target weight W _O is B _O , the amplitude intensity B _O is calculated by the proportional calculation of the following equation, as shown in FIG. B _O = ((B ₂ −B ₁ ) / (W ₂ −W ₁ )) · (W _O −
W ₁₎ the upper limit is more controlled conditions alpha _O, amplitude time BT _O,
Feeder time magnification beta _O, performs hopper timing HT _O, staggered discharge time DT _O, the dispersion feeder feed weight FW _O Similarly calculating means also including (CPU) 54 proportional operation, latches each control condition to the latch circuit 58 (Step S5). The control conditions of the set target weight W _O are set at predetermined timing, for example, when the weighing work is completed, the control conditions latched by the latch circuit 58 are stored in the storage unit (memory) by the writing unit (CPU) 62. ) 52. The control means 56 controls the driving machine group 60 of each part based on this control condition set value.

Based on the setting of the above control conditions, this device operates as follows. In FIG. 2, the articles sent from the supply conveyor (not shown) are collected in the center of the dispersion feeder 4 via the supply chute 2 according to the set dispersion feeder supply weight FW _O. Then, the amplitude intensity B _O of dispersion feeder 4, is dispersed supplied to the radiation feeder 6 by vibration in the condition of the amplitude time BT _O. Then, goods, the same vibration in the feeder time magnification beta _O of the radiation feeder 6, after being temporarily pooled in accordance with the measurement operation is sent to the pool hopper 8, it is introduced into the weighing hopper 10. The operation delay time of each hopper at this time is set by the hopper timing HT ₀ . The drive metering unit 12 measures the weight of the product put into the weighing hopper 10. Goods weight is measured is discharged from the discharge chute 14 on the basis of the difference discharge time DT _O.

As described above, the present apparatus can automatically calculate and set the control condition setting value suitable for the item to be weighed by simply inputting the item including the target weight of the item to be weighed. .

Next, FIG. 6 is a schematic side view of an automatic noodle weighing device according to another embodiment of the present invention. This device is, for example, an upper-stage supply hopper 2 exclusively for "spaghetti"
4, upper swing gate 28, upper tip swing gate 32, upper vibrating trough 46, upper weighing hopper 36, drive weighing unit 4
0, an upper-stage weighing unit 20, a lower-stage supply hopper 26, a lower-stage swing gate 30, a lower-stage tip swing gate 34,
The lower stage weighing unit 22 including the lower stage vibration trough 48, the lower stage weighing hopper 38, and the drive weighing unit 42, and the operation panel 4
4 and. This device is controlled by a CPU incorporated in the operation panel 44, and in order to measure noodle-like products with high performance and high accuracy, rough measurement is performed in the upper stage and correction measurement is performed in the lower stage.

First, in the upper weighing section 20, the product is sent from the upper feeding hopper 24 by the vibration of the upper vibrating trough 46, and is thrown into the upper weighing hopper 36 through the swing gate 28 and the tip swing gate 32, and weighs first. To be done. On the other hand, even in the lower weighing section 22, the products are
By the vibration of the lower-stage vibration trough 48, it is sent from the lower-stage supply hopper 26 through the lower-stage gate 30 and the tip swing gate 34, and in the lower-stage weighing hopper 38, the upper-stage weighing unit 2
At 0, the item is weighed and merged, and the weighing operation is performed until the final target value is reached.

The operation panel 44 has various means similar to those shown in FIG. 1, and since the product name is fixed as "spaghetti", only the target weight is input from the input means (numeric keypad) 50. Then, each control condition set value is similarly calculated based on the new target weight. Therefore, the gates of the supply hoppers 24 and 26 are adjusted, and the upper supply hopper 24 is
And the control conditions such as the drive timing of the lower supply hopper 26 are optimally set, and the new target weight "spaghetti" is automatically measured.

In this embodiment, the target weights before and after the new target weight among the reserved target weights are used for calculation, but the new target weight is the target weight of the small capacity type a. Even if it is smaller than W ₁ or larger than the target weight W ₃ of the large capacity type c, the target weights W ₁ , W ₂ close to the new target weight, or
Similar calculations can be performed using the target weights W ₂ and W ₃ .

Further, in this embodiment, the number of reservations registered is 2
Although the calculation is performed using one target weight, the calculation may be performed using three or more target weights.

As described above, according to the present invention, in accordance with the item including the inputted target weight of the object to be weighed, the calculating means has the plurality of stored control conditions of the target weight close to the target weight. The set value is read from the storage means, and the control condition set value for the target weight is calculated based on the plurality of stored control condition set values. Therefore, only by inputting the item including the target weight of the object to be weighed, it is possible to automatically set the control condition setting value that matches the item of the object to be weighed. Accordingly, it is possible to provide an automatic weighing device that easily realizes optimum weighing of the objects to be weighed according to the diversification of products.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic side view of an automatic weighing device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a basic configuration of a signal processing system of the above automatic weighing device.

FIG. 3 is a diagram showing a state of reservation registration.

FIG. 4 is a view showing a flowchart showing the operation of the above automatic weighing device.

FIG. 5 is a diagram showing a state of proportional calculation.

FIG. 6 is a diagram showing a schematic side view of an automatic weighing device according to another embodiment of the present invention.

[Explanation of symbols]

50 ... Input means (numeric keypad), 52 ... Storage means (memory), 54 ... Arithmetic means (CPU), 56 ... Control means,
58 ... Latch circuit, 60 ... Driver group, 62 ... Writing means (CPU).

Claims (1)

[Claims] 1. A weighing device for weighing an object to be weighed under a predetermined control condition adapted to an item including the target weight, the input means for inputting the item of the object to be weighed, and a plurality of items having different target weights. Based on the target weight of the items input from the input means, the stored control condition set values for a plurality of target weights close to the target weight are read out from the storage means. Calculating means for calculating the control condition setting value of the target weight based on these read-out stored control condition setting values, based on the control condition setting value of the target weight calculated by the calculating means, An automatic weighing device comprising a control means for controlling a control system of the weighing device.