JPH0715401B2 - Combination weighing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination weighing device,
In particular, when processing objects to be weighed with multiple items and various target values with one combination weighing device, various conditions necessary for weighing are pre-registered and called up at the start of weighing work. The present invention relates to a combination weighing device that does not require setting of conditions.

[0002]

2. Description of the Related Art Weighing weight values of objects to be weighed into a plurality of weighing machines, and combining the weight values to give a combined total value equal to a target value or closest to the target value within a set allowable range. In addition to selecting the machine combination, discharge only the objects to be weighed of the selected weighing machine, and add a new object to the weighing machine from which the objects have been discharged to prepare for the next combination. A combination weighing device is known in which high-precision automatic weighing is continuously performed by repeating similar operations.

FIG. 6 is an explanatory view of such a combination weighing device. In the figure, reference numeral 21 is a dispersion feeder for circumferentially dispersing an object to be weighed and supplying the object to be weighed to a plurality of radially arranged weighing sections. The dispersion feeder 21 has a vibration transfer type structure, and spirally oscillates by a vibrating section 22 including an electromagnet to disperse and supply the objects to be weighed to the respective weighing sections.

On the other hand, the weighing section is equipped with a radiation feeder 2.
3, pool hopper 25, weighing hopper 26, weight detector 2
7, and n sets are radially arranged around the dispersion feeder 21. The weighing hopper 26 and the weight detector 27 form a weighing machine.

The radiation feeder 23 is vibrated by a vibrating section 24 including an electromagnet to linearly feed an object to be weighed and put it into a pool hopper 25. Also, each pool hopper 2
5 is provided with a pool hopper gate 28, and the objects to be weighed stored when the gate 28 is opened are supplied to the weighing hopper 26. Furthermore, each weighing hopper 2
A weight detector 27 is attached to each of the units 6, and the weight detector 27 measures the weight of the object to be weighed and sends the measured weight data to the combination calculation control unit (see FIG. 1).

Then, the combination calculation control section performs a combination calculation based on the weight data from each weighing machine or the weight detector 27, and gives a combination total value equal to the target value or closest to the target value within the set allowable range. A combination of weighing machines is selected, a discharge signal is output to the weighing machine selected for this combination, the weighing hopper gate 29 provided in the weighing hopper 26 is opened, and the objects to be weighed stored in the weighing chute 30 are collected. To discharge. Then, the objects to be weighed discharged from the respective weighing machines are collected by the collecting chute 30 and supplied to the packaging machine (not shown).

In FIG. 6, reference numeral 31 is a drive unit for opening and closing the gates 28 and 29 of the hoppers 25 and 26 via a link mechanism.

By the way, in order to operate such a combination weighing device to perform automatic weighing work, various weighing conditions are set as a preparation for operation, and the numerical values are given to a control unit of the weighing device by a ten-key pad, a digital switch, and a dial. It must be set via a data input means such as a switch.
In that case, it is usually necessary to set at least the following as these measurement conditions.

First, a weighing target weight value to be combined and weighed as a weighing specification (hereinafter referred to as a target value) and an allowable range for checking the weighing accuracy of the combined weighing value obtained by the arithmetic operation to judge whether the result is acceptable or not, That is, an upper limit value and a lower limit value for the target value (only the upper limit value when the target value itself is the lower limit value of the allowable range) are required, and each weighing machine for the object to be weighed for realizing this weighing specification. Adjustment value of the supply amount to the distribution feeder 21, that is, the dispersion feeder 21 and each radiation feeder 23 ... 2
The numerical values of the vibration intensity and the vibration time as the drive control amount for 3 and 3 are required.

Then, the vibration intensity of the dispersion feeder 21 and each of the radiation feeders 23 ... 23 for controlling the supply amount of the object to be weighed is adjusted by changing the value of the current supplied to the electromagnets mounted in each of the feeders 21, 23. Increase and decrease,
In addition, the dispersion feeder 21 and each radiation feeder 23 ...
Normally, the adjustment of the vibration time is performed by a timer, but conventionally, the following work was required to set the intensity and the time to appropriate values.

That is, first, the vibration intensity and vibration time of the feeders 21, 23 ... 23 are set to tentatively determined values by a dial switch or the like, and the weighing target value and an allowable range for the target value are set by a digital switch or the like. After that, the objects to be weighed are experimentally supplied to perform the combined weighing. Then, since the number of the weighing machine selected for the combination is displayed on the display unit by a lamp, the vibration intensity and the vibration time of each feeder 21, 23, ... 23 are adjusted by the dial switch or the like so that the number approaches n / 2. Adjust. This is because the combination of n / 2 units has the highest frequency, and thus there is a high possibility of obtaining a metric value close to the target value. Then, the value adjusted in this way becomes an appropriate value, which is set as the drive control amount for the feeders 21, 23, ... 23, and thereafter, the original combination weighing operation is started under these weighing conditions. is there.

[0012]

As described above, conventionally, the various conditions necessary for the weighing work have been set manually or by an experimental and empirical method based on a trial-and-error method. In such a setting method, the operator operates the digital switch or the dial switch each time the object to be weighed or the target value changes, and the target value and the allowable range for the target value, the feeders 21, 23, ... Therefore, it is necessary to carry out the setting work of various measurement conditions such as the drive control amount for 23. Therefore, especially if you want to perform weighing work with many kinds of objects and different target values, or if you want to change the weighing conditions even for the same object depending on the season, lot, etc. The work of setting becomes very troublesome, and the possibility of erroneous setting increases, which reduces productivity.

Therefore, the present invention eliminates the need to reset the weighing conditions every time the object to be weighed or the target value changes, thereby improving the productivity of weighing work using this type of combination weighing device. At the same time, it is an object to ensure the versatility of the combination weighing device.

[0014]

In order to solve the above problems, the present invention is characterized by having the following configuration.

That is, according to the present invention, a plurality of weighing machines and a supply means for supplying the objects to be weighed to these weighing machines are provided, and the measured values of the respective weighing machines are combined to be equal to or close to the target value. In a combination weighing device configured to obtain a combination and discharge an object to be weighed from a weighing machine according to the obtained combination, a target value, a permissible range for the target value, and the above-mentioned supply are provided as various measurement conditions necessary for weighing work. Storage means for storing a plurality of sets of drive control amounts for the means in association with the object to be weighed, and designating means for designating a set corresponding to the object to be weighed required from a plurality of sets of these measurement conditions. Read-out means for reading out the set of weighing conditions from the storage means, and a set of weighing conditions temporarily during weighing work under conditions that do not correspond to the plurality of sets of weighing conditions stored in the storage means. Configuration Using the setting means and the target value and the allowable range read by the reading means or set by the setting means, the measured values of the respective weighing machines are combined to be equal to or close to the target value within the allowable range. It is characterized in that it further comprises arithmetic means for selecting a combination and drive means for driving the supply means based on the drive control amount read by the read means or set by the setting means.

[0016]

According to the above-mentioned structure, the target values preliminarily assumed corresponding to various kinds of objects to be weighed, the allowable range for the target values, the measurement control conditions such as the drive control amount for the objects to be weighed, and the like are set. A plurality of sets can be stored in the storage means, and the weighing conditions of any set can be read out as necessary, so that the weighing corresponding to the object to be processed this time at the start of weighing work. By reading out the various conditions, it becomes possible to immediately start the work without setting these measurement conditions again.

In particular, according to the present invention, the setting means for temporarily setting one set of measurement conditions that do not correspond to the plurality of sets of measurement conditions stored in the storage means is provided. When handling an object to be weighed other than a previously assumed object to be weighed, or even if the object is a previously assumed object to be weighed with different target values, etc. It is possible to set a set of various weighing conditions used only for the work, and perform the combination calculation or drive control of the object-to-be-measured supply means under the conditions.

[0018]

EXAMPLES Examples of the present invention will be described below.

In FIG. 1, reference numeral 1 denotes a data input section having the following keys mounted on an operation box of a combination weighing device. The data input section 1 includes a reservation call key 2, a ten key 3 and a setting key. 4, a set value key 5, a reservation key 6, a plurality of feeder setting keys 7, etc. are provided.

Reference numeral 8 is a key discrimination control portion for discriminating an input key among various keys 2 to 7 in the data input portion 1, and 9 is i + 1 memories M ₁ , M _2, ... M.
_A storage unit 10 made up of _{i 1} and M _{i + 1} is a write control unit. The write control unit 10 stores i + 1 in the storage unit 9 for various weighing conditions set by using a predetermined key of the data input unit 1.
This is for storing in a predetermined memory among the memories M ₁ , M ₂ ... M _i , M _{i + 1} . Reference numeral 11 is a read control unit, and the read control unit 11 is the storage unit 9
Among the memories M ₁ , M ₂ ... M _i , M _{i + 1} in the memory, the stored contents of the memory designated by using a predetermined key of the data input unit 1 are called.

Further, 12 is a display unit, 13 is a counting unit, 14 is a feeder changing unit, 15 is a combination calculation control unit,
Reference numeral 16 is a dispersion feeder driving unit, and 17 is a radiation feeder driving unit.

With the above configuration, the target value according to each object to be weighed, the upper limit value and the lower limit value indicating the limit of the allowable error with respect to the target value, and each for controlling the supply amount of the object to be weighed. Each of the memories M ₁ , M ₂ ... M _i in the storage unit 9 is set as a reserved value via the data input unit 1 as a set of various measurement conditions such as vibration intensity and vibration time of the feeders 21, 23.
The reserved value stored in any one of the memories is recalled as required, and the combined weighing operation is performed by using the reserved value as a set value of various weighing conditions.

In this case, for example, when weighing 200 g, the target value is set to 200.0 g and the upper limit is set to 206.
g, and the lower limit value is 200 g, 200.0 to 206.
Combination weighing will be performed with 0 g as an allowable range.

Further, the vibration intensity of the dispersion feeder 21 and the radiation feeders 23 ... 23 is divided into 10 ways, each of which is associated with the number of the key switch from 0 to 9 of the ten-key pad 3. Numeric keypad 0 to 9
By pressing any of the key switches up to, the vibration intensity will be set. It should be noted that this vibration strength becomes stronger as the number of the key switch is larger.

Similarly, the vibration time of the dispersion feeder 21 and each of the radiation feeders 23 ... 23 is divided into 10 ways, each of which is associated with the number of the key switch from 0 to 9 of the ten-key 3. , 0 on numeric keypad 3
By pressing any of the key switches up to 9, the vibration time will be set. In this case, this vibration time becomes longer as the number on the key switch increases.

Here, depending on the unit weight and shape of the object to be weighed,
Even though the vibration intensity and the vibration time of the feeders 21, 23 ... 23 are the same, the supply amount of the objects to be weighed is different. It is determined for each object to be weighed or for each target value.

Next, the procedure of the reservation operation of the various weighing conditions, the calling operation, and the operation of changing the vibration intensity and the vibration time of the feeders 21, 23 ... 23 will be described. (Here, i = 10 in the following description).

First, the reservation operation for the various metering conditions is performed as shown in FIGS. That is, when the reservation key 6 of the data input section 1 mounted on the operation box is pressed, the operation is discriminated by the key discrimination control section 8 to instruct the start of the reservation operation, and the display section 12 is started. Is displayed. Next, by using the ten-key pad 3 to enter any number from 1 to 10 and pressing the setting key 4, the memory M in the storage unit 9
Reservation number corresponding to any one of ₁ , M ₂ ... M ₁₀ is entered and the old target value that was previously set in the memory corresponding to that number (for example, 200.0 if 200g was previously set) Is displayed on the display unit 12 via the read control unit 11.

Then, when the old target value is not changed, the setting key 4 may be pressed again, and as a result, 1 in the storage unit 9 is passed through the key discrimination control unit 8 and the writing control unit 10.
The target value is stored in the memory corresponding to the reservation number among the zero memories M ₁ , M ₂ ... M ₁₀ . Further, when changing the old target value, it is sufficient to input the numeral using the ten-key pad 3 and then press the setting key 4, whereby the key discrimination control unit 8 and the writing control unit 1 are operated.
10 memories M ₁ , M ₂ ... M in the storage unit 9 via 0
_The new target value input with the ten key 3 is stored in the memory corresponding to the reservation number out of ₁₀ .

Next, the display unit 12 displays the old upper limit value previously set by the reservation number. When the old upper limit value is not changed, the setting key 4 may be pressed, whereby the upper limit value is stored in the memory corresponding to the reservation number in the storage unit 9 via the key determination control unit 8 and the writing control unit 10. Remembered. Further, when changing the old upper limit value, it is sufficient to input the number using the ten-key pad 3 and then press the setting key 4, whereby the key discrimination control unit 8 and the writing control unit 10 are operated. The new upper limit value input by the ten keys 3 is stored in the memory corresponding to the reservation number in the storage unit 9.

Further, the lower limit value is set in the same procedure as the above upper limit value, but in general, the lower limit value is often the same value as the target value. This is due to a business practice for avoiding a consumer's complaint of lack of weight, and since this embodiment also adopts this style, the lower limit setting operation is not performed.

Next, the display unit 12 displays the previously set values of the vibration intensity and the vibration time of the feeders 21, 23, ... When the old vibration intensity and the vibration time are not changed, by pressing the setting key 4, the vibration intensity is stored in the memory corresponding to the reservation number in the storage unit 9 via the key determination control unit 8 and the writing control unit 10. And the vibration time are stored. When changing the old vibration intensity and the vibration time, the vibration intensity of the dispersion feeder 21, the vibration intensity of the radiation feeders 23 ... 23, the vibration time of the dispersion feeder 21, the vibration of the radiation feeders 23 ... 23 are changed using the ten-key pad 3. Enter the 4-digit number in the order of time and press the setting key 4. As a result, the changed feeder 21 in the memory corresponding to the reservation number in the storage unit 9 through the key determination control unit 8 and the writing control unit 10 is used.
The vibration intensity and the vibration time of 23 ... 23 are stored.

By the above operation procedure, the reservation work of a set of weighing conditions corresponding to a certain object is completed, and in the same manner, the above operations are repeated while sequentially changing the reservation numbers, thereby making each reservation. A set of measurement conditions is reserved in each of the ten memories M ₁ , M ₂ ... M ₁₀ in the storage unit 9 corresponding to the number.

When the reservation operation is interrupted midway, the reservation key 6 is pressed again to update the reservation contents up to the position where the setting key 4 is pressed. For example, when only the target value is to be corrected, the target value is input with the ten key 3 in the reservation procedure, the setting key 4 is pressed, and then the reservation key 6 is pressed. Only the target value will be updated.

After the reservation operation is completed, the stored contents of the last reserved memory are recalled, the target value and the upper limit value are output to the combination calculation control unit 15, and the vibration intensity and vibration of the distributed feeder 21 are calculated. The time is output to the dispersion feeder driving unit 16, and the vibration intensity and the vibration time of the radiation feeders 23 ... 23 are output to the radiation feeder driving unit 17.

Here, i in the storage unit 9, in this case, 1
The zero memories M ₁ , M _2, ... M ₁₀ are memories for reserving the weighing conditions corresponding to each object to be weighed by the above-mentioned reservation operation. Reference numeral ₁₁ is not a memory for reserving various weighing conditions in advance, but the tenth memories M ₁ , M ₂ ... M ₁₀
When performing weighing operations on objects other than the objects reserved for the above, or these memories M ₁ , M ₂ ...
The object to be weighed is the same as the object to be weighed stored in any of M ₁₀ , but when the weighing operation is performed by changing the target value, it is necessary only for the weighing work. Target value, upper limit value, dispersion feeder 21 and radiation feeder 23 ...
23 is a memory for temporarily storing a set of various measurement conditions of vibration intensity and vibration time.

The operation procedure for setting the various weighing conditions in the memory M ₁₁ is almost the same as the reservation operation described above, as shown in FIGS. 1 and 3, but in this operation, the reservation key in the reservation operation is used. Instead of pressing 6, the set value key 5 is pressed, and thereafter, by performing the same operation as the reservation operation, a set of various weighing conditions is stored in the memory M ₁₁ . Then, in this case, after the setting is completed, the stored contents of the memory M ₁₁ are called, the target value and the upper limit value are output to the combination calculation control unit 15, and the vibration intensity and vibration time of the distributed feeder 21 are sent to the distributed feeder drive unit 16. Output, also
The vibration intensity and vibration time of the radiant feeders 23 ... 23 are output to the radiant feeder driving unit 17, and an operation key (not shown)
If is pressed, the combined weighing operation is started under these conditions.

Next, the calling operation will be described.

As shown in FIGS. 1 and 4, when the reservation call key 2 of the data input unit 1 mounted on the operation box is pressed, the reservation number is sequentially incremented by the counting unit 13 each time. This counting unit 13
When the reservation call key 2 is pressed even after the reservation number reaches 10, the reservation number 11 for temporary setting
Skip and count up again from the first reservation number 1. In other words, this reservation number is cyclically called.

Then, in response to the reservation number calling command from the counting unit 13, the weighing conditions stored in the memory corresponding to the reservation number among the memories M ₁ , M ₂ ... M ₁₀ in the storage unit 9 are read out. Control unit 1
It is read by 1 and displayed on the display unit 12. Further, among the read out weighing conditions, the target value and the upper limit value are output to the combination calculation control unit 15, and the distributed feeder 21
23 is output to the distributed feeder driving unit 16, and the vibration intensity and vibration time of the radiation feeders 23 ... 23 are output to the radiation feeder driving unit 17.

In this way, a set of weighing conditions corresponding to the object to be processed this time is called, and the combination weighing operation is performed under the conditions, and each time the weighing operation is started, There is no need to set various conditions. The operation of calling the reserved various weighing conditions is performed while the combination weighing device is stopped, and then the operation key (not shown) is turned on to start the combination weighing operation under the conditions.

Further, the operation of changing the vibration intensity and the vibration time as the drive control amount of the feeders 21, 23 ... 23 will be described.

Even if the kind of the object to be weighed and the target value and the allowable range (upper limit value) are the same, this operation is performed based on, for example, the property of the object to be weighed due to the lot, season, working environment, etc. of the object to be weighed. Due to a change or a change in the supply condition of the object to be weighed to the combination weighing device, the distributed supply state of the object to be weighed to each weighing machine by the dispersion feeder 21 and each radiation feeder 23 ... This is for dealing with the case where the supply amount to the machine is excessive or insufficient, and the vibration intensity and the vibration time of the dispersion feeder 21 in the weighing conditions and the radiation feeders 2 are used.
The vibration intensity of 3 ... 23 and the four items of the vibration time are changed.

As shown in FIGS. 1 and 5, first, when changing the vibration intensity of the distributed feeder 21, when increasing the vibration intensity, the vibration intensity of the distributed feeder of the feeder setting keys 7 in the data input section 1 is increased. When the key is pressed, a command is sent to the feeder changing unit 14 via the key discrimination control unit 8 and the display unit 12 displays the distributed feeder vibration intensity stored in the memory of the reservation number. Then, if the above key for increasing the strength is kept pressed, the strength is counted up by one by the timer operation, the value is displayed on the display unit 12, the stored value in the memory is updated, and The updated vibration intensity is output to the dispersion feeder drive unit 16. When the key is further pressed, the above operation is repeated, and the desired strength is set within the range of the maximum strength of 9.

When the vibration intensity of the distributed feeder 21 is weakened, when the key of the feeder setting key 7 that weakens the vibration intensity of the distributed feeder is pressed, a command is sent to the feeder changing unit 14 via the key discrimination control unit 8. And the display unit 1
In 2, the dispersion feeder vibration intensity stored in the memory is displayed. Then, if the key for weakening the strength is kept pressed, the strength is counted down by one by the timer operation, and the value is displayed on the display unit 12, and
The stored value in the memory is updated, and the updated vibration intensity is output to the distributed feeder drive unit 16. When the key is further pressed, the above operation is repeated, and the desired strength is set within the range of the minimum strength 0.

The stored values of the vibration time of the dispersion feeder 21, the vibration intensity and the vibration time of the radiation feeders 23 ... 23 are updated in the same manner as the above operation.

The present invention is not limited to the contents described in the above embodiment, and, for example, by installing a plurality of exclusive keys corresponding to the reservation numbers on the operation box and pressing the keys. , It is also possible to read out and set the weighing conditions from the memory corresponding to the reservation number of that key. Alternatively, enter the reservation number by entering it with the numeric keypad and enter the weighing conditions from the memory corresponding to that reservation number. May be read and set.

[0048]

As described above, according to the present invention,
In the combination weighing device, it is possible to reserve a plurality of sets of measurement conditions such as a target value, a permissible range for the target value, or a drive control amount for the object supply means, in advance, corresponding to the object to be measured. When the object to be weighed or the target value is changed and these conditions are changed, the conditions can be easily changed by simply performing the calling operation, and the time required for the change is significantly shortened. In addition, even if the measurement conditions are changed frequently or the number of setting items of the measurement conditions is increased, skill is not required for the setting work and the possibility of erroneous setting is reduced. The productivity of the weighing work using the combination weighing device of various kinds will be improved.

In particular, according to the present invention, the setting means for temporarily setting one set of measurement conditions that do not correspond to the plurality of sets of measurement conditions stored in the storage means is provided. As described above, it is possible to improve productivity by using the reservation or calling function of various weighing conditions, and at the same time, it is possible to perform weighing work on unreserved weighing objects or conditions. The versatility of will be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a combination weighing device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a procedure of a reservation operation.

FIG. 3 is a flowchart showing a setting procedure using a set value key.

FIG. 4 is a flowchart showing a procedure of a calling operation.

FIG. 5 is a flowchart showing a procedure for changing the vibration intensity of the distributed feeder in the procedure for changing the feeder driving condition.

FIG. 6 is an explanatory diagram of a schematic configuration of a combination weighing device.

[Explanation of symbols]

1 Designating Means (Data Input Section) 5 Setting Means (Set Value Key) 9 Storage Means (Storage Section) 11 Reading Means (Reading Control Section) 15 Computing Means (Combination Computation Controlling Sections) 16 and 17 Driving Means (Dispersion Feeder Driving Section) , Radiation feeder drive unit) 21,23 supply means (dispersion feeder, radiation feeder) 26, 27 weighing machine (weighing hopper, weight detector)

Claims (1)

[Claims] 1. A plurality of weighing machines and a supply means for supplying an object to be weighed to these weighing machines are provided, and the measured values of the respective weighing machines are combined to obtain a combination equal to or close to a target value, In a combination weighing device configured to discharge an object to be weighed from a weighing machine according to the obtained combination, a target value, a permissible range for the target value, and drive control for the supply means are provided as various measurement conditions necessary for weighing work. Storage means for storing a plurality of sets corresponding to the objects to be weighed, designating means for designating a set corresponding to a required object to be weighed from a plurality of sets of these weighing conditions, and weighing of the designated set A reading means for reading out various conditions from the storage means, and a setting means for temporarily setting a set of various measurement conditions during a weighing operation under a condition that does not correspond to a plurality of sets of weighing conditions stored in the storage means. When, Calculation for combining the measured values of the respective weighing machines by using the target value read by the reading means or set by the setting means and the allowable range and selecting a combination equal to or close to the target value within the allowable range. A combination weighing device comprising: a driving means for driving the supply means based on the drive control amount read by the reading means or set by the setting means.