JPH0517491B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a combination weighing device, and particularly relates to various items necessary for weighing when a single combination weighing device processes objects to be weighed with multiple items and various target values. This invention relates to a combination weighing device in which conditions are pre-registered and the reserved values are called for each measurement, thereby eliminating the need to set the conditions each time.

BACKGROUND ART A weighing machine that weighs the weights of objects to be weighed that are input into a plurality of weighing machines, and then combines the weight values to give a combined total value that is equal to a target value or closest to it within a set tolerance range. Select a combination, discharge only the object to be weighed from the selected weighing machine, then put a new object to be weighed into the weighing machine from which the object to be weighed was discharged, and proceed to the next combination, and do the same from then on. A combination weighing device that repeats the above operations to continue high-precision automatic weighing is already known.

FIG. 6 is an explanatory diagram of such a combination weighing device. In the figure, to describe the operation of the weighing device, reference numeral 21 denotes a dispersion feeder that disperses objects to be weighed in the circumferential direction and supplies the objects to a plurality of radially arranged weighing sections. This dispersion feeder 21 has a vibration transfer type configuration, and performs spiral rotational vibration in a vibrating section 22 including an electromagnet to disperse and supply objects to be weighed to each weighing section.

The weighing section is composed of a radial feeder 23, a pool hopper 25, a weighing hopper 26, and a weight detector 27.
Groups are arranged.

Note that the weighing hopper 26 and the weight detector 27 constitute a weighing machine.

The radiation feeder 23 is vibrated by a vibrating section 24 including an electromagnet, feeds the object to be weighed in a straight line, and throws it into a pool hopper 25. Each pool hopper 25 is provided with a pool hopper gate 28, which is opened to supply the stored object to be weighed to the weighing hopper 26. A weight detector 27 is attached to each weighing hopper 26, and measures the weight of the supplied object to be weighed, and inputs the weighing data to the combination calculation control section (FIG. 1). The weighing machines selected as the optimal combination by the combination calculation control section open the weighing hopper gates 29 provided in each weighing hopper 26 in response to a discharge signal from the control section, and discharge the objects to be weighed therein into the collection chute 30. They are collected at the lower center of the chute and discharged to a packaging machine (not shown). Reference numeral 31 is a drive unit that opens and closes the gates of each hopper via a link mechanism.

Now, in order to operate such a combination weighing device and perform automatic weighing work, various measurement conditions are determined in preparation for operation, and the values are input to the control department of the weighing device using a data input means such as a numeric keypad, digital switch, dial switch, etc. It must be entered as a “setting value” via .

Normally, the following minimum measurement conditions, ie, set values, are required. First, the measurement target weight value to be measured in combination as a measurement specification [hereinafter referred to as target value]
And check the measurement accuracy of the actual combined measurement value,
In order to judge pass/fail, a tolerance range, that is, an upper and lower limit value for the target value (when the target value itself is the lower limit of the tolerance range, only the upper limit value) is required, and then the measurement target to realize this measurement specification. Adjustment values for the amount of material to be supplied to each weighing machine, that is, numerically encoded values of the vibration intensity and vibration time (hereinafter simply referred to as intensity and time), which are the vibration conditions of the dispersion feeder 21 and each radiation feeder 23, are required. be.

Adjustment of the strength of the dispersion feeder 21 and the radiation feeder 23 in order to control the supply amount of the object to be weighed is performed by increasing or decreasing the current value to the electromagnet installed in each feeder. 23 is adjusted using a timer.
Conventionally, in order to set the strength and time of the feeder to appropriate values, first, the strength and time of the feeder are set to tentative values using a dial switch, etc., and the objects to be weighed are experimentally fed and combined weighing is performed. Have them do it. Of course, at this time, the target value and the allowable range for the target value must be set using a digital switch. Then, the number of the weighing machines selected for the combination is displayed by a lamp on the display section, and the dial switch is adjusted so that the number approaches n/2 machines. This is because the combination of n/2 units has the highest frequency and therefore has a high possibility of obtaining a measured value close to the target value. The value adjusted in this way becomes the appropriate value, and the setting of the measurement conditions is completed, and the operation of the apparatus is started from then on. The weighing conditions of the object to be weighed are set experimentally and empirically using the trial and error method described above, and the operator operates the digital switch or dial switch each time the object to be weighed or the target value changes. Each time, the measurement conditions such as the object to be weighed, the target value, the allowable range for the target value, and the vibration conditions of the feeders 21 and 23, such as the intensity and time, had to be set before operation.

Problems to be Solved by the Invention As described above, conventional combination weighing devices that reset measurement conditions each time are used to perform weighing processes for many types of objects to be weighed or target values, or for the same object to be measured. However, if you want to change the weighing conditions depending on the season or lot, etc., resetting the weighing conditions is very troublesome and requires skill, and if there are many setting items for the weighing conditions, it is easy to make mistakes. The configuration possibilities also increase, and productivity also decreases.

Means for Solving the Problems The present invention solves the above-mentioned conventional problems, and includes a plurality of weighing machines, a vibrating feeding device that supplies objects to be weighed to these weighing machines, and In a combination weighing device that is configured to combine the weighing values of each weighing machine to find a combination that is equal to or close to the target value, and to discharge the object to be weighed from the weighing machine that corresponds to the found combination, As the measurement conditions necessary for the work, a storage means for storing a plurality of sets of target values, tolerance ranges for the target values, vibration intensity and vibration time of the above-mentioned supply device corresponding to the objects to be weighed, and a storage means for storing multiple sets of these measurement conditions. A designation means for designating a set corresponding to the required object to be weighed from a plurality of sets, a readout means for reading out the weighing conditions of the designated set from the storage means, and a combination of the weighing values of each weighing machine. A calculation means for selecting a combination equal to or close to the target value within the tolerance range read by the reading means, and a driving means for driving the supply device with the vibration intensity and vibration time also read by the reading means. It is characterized by

Effect By having the above-mentioned structure, the present invention sets a plurality of measurement conditions such as a target value, an allowable range for the target value, vibration intensity and vibration time of the object to be weighed in advance in correspondence with the object to be measured. A set of weighing conditions can be stored, and therefore, at the start of a weighing operation, it is only necessary to recall the set of weighing conditions corresponding to the currently required object to be weighed.

Embodiment In Fig. 1, 1 is a data input unit equipped on the operation box of such a combination weighing device and has the following keys, 2 is a reservation call key, 3 is a numeric keypad for setting numerical values, and 4 is a setting 5 is a setting value key, 6 is a reservation key, 7 is a feeder setting key consisting of a plurality of keys, 8 is a key discrimination control unit that discriminates which key is input among the above keys, 9 is i+1 memories M ₁ , A storage unit consisting of M ₂ ...M _i , M _i+1 , 10 is a write control unit, which uses a predetermined key of the data input unit 1 to write i+1 memories in the storage unit 9.
This is a control unit for storing set measurement conditions in a predetermined memory among M ₁ , M ₂ . . . M _i , M _i+1 . Reference numeral 11 denotes a read control unit, which uses a predetermined key of the data input unit 1 to call out a memory designated as a required memory from each memory M ₁ , M ₂ . . . M _i , M _i+1 in the storage unit 9. . 12 is a display section, 13
1 is a counting section, 14 is a feeder changing section, 15 is a combination calculation control section, 16 is a distributed feeder driving section, 1
7 is a radiation feeder drive section.

With the above configuration, measurement conditions such as the target value of the object to be weighed, the upper and lower limits indicating the allowable limits in actual measurement, and the strength and time of each feeder for controlling the supply amount of the object to be weighed are stored as reserved values in the memories M ₁ , M _{2 .} . . M _i in the storage unit 9 via the data input unit 1.
Each reserved value is stored in advance, and each reserved value is called up as needed, and a combination weighing operation is performed using the contents as a set value. For example, if weighing and packaging 200g, the target value is 200.0g, the upper limit is 206g, and the lower limit is 200g, then 200.0 to 206.0g is weighed and discharged as an allowable range. In addition, the intensity of the dispersion feeder and radiation feeder is divided into 10 ways.
Each of them corresponds to a key switch number from 0 to 9 on the numeric keypad 3, and by pressing one of the key switches from 0 to 9,
Set the strength above. This is so that the larger the number, the larger the amplitude of the feeder.
The vibration time of the dispersion feeder and radiation feeder is also divided into 10 ways, and each of them is divided into 0 on the numeric keypad 3.
The time is set in correspondence with the key switch numbers from 0 to 9, and by pressing any key switch from 0 to 9. This is so that the larger the number, the longer the vibration time. Here, even if the strength and time of the feeder are the same, the feed amount of the object to be weighed differs depending on the unit weight and shape of the object to be weighed. determined by The procedures for reservation operation, call operation, and feeder change operation are as follows [here, i=
10].

First, in the reservation operation, as shown in FIGS. 1 and 2, when the reservation key 6 of the data input section 1 installed on the operation box is pressed, the key discrimination control section 8 discriminates and starts the reservation operation. Instructing and display section 12
is displayed. Next, use the numeric keypad 3 to enter any number from 1 to 10 and press the setting key 4, the reservation number corresponding to the memory in the storage section 9 will be input, and the reservation number that was previously set will be entered. Old target value [For example, if 200g was set last time]
200.0] is displayed on the display unit 1 via the readout control unit 11.
2. If the old target value is not changed, when the setting key 4 is pressed again, the reserved number among the 10 memories M ₁ , M _{2 .} The target value is stored in the memory corresponding to the target value. If you want to change the old target value, enter the number using the numeric keypad 3 and press the setting key 4. The changed target value is stored in the memory corresponding to the reservation number among _M1 , _M2 ... _M10 . Next, the display section 12 displays the old upper limit that was previously set for this reservation number. If you do not want to change the old upper limit value, press the setting key 4 and the key discrimination control section 8 and writing control section 1 will be activated.
The upper limit value is stored in the memory corresponding to the reservation number in the storage unit 9 via 0. In addition, when changing the old upper limit value, enter the number using the numeric keypad 3 and press the setting key 4. The changed upper limit value is stored in the memory corresponding to the above. Next, the lower limit value is set using the same procedure as the upper limit value, but generally the target value is often set as the lower limit value. This is a business practice to avoid complaints from consumers about insufficient quantities, and this embodiment also uses this format, so there is no operation to set the lower limit value.
Next, the display unit 12 displays the old setting values of each feeder strength and time that were previously set. When the feeder strength and time are not changed, when the setting key 4 is pressed, the feeder strength and time are stored in the memory corresponding to the reservation number in the storage unit 9 via the key discrimination control unit 8 and the write control unit 10. . When changing the above feeder strength and time, use the numeric keypad 3 to change the feeder strength and time.
Enter the four-digit number in the order of radiation feeder strength, dispersion feeder time, and radiation feeder time and press the setting key 4. The changed feeder strength and time are stored in the corresponding memory, and the reservation operation is completed. With the above operating procedure, one set of reservations is completed, and by sequentially changing the reservation number and performing the same operation as above, the 10 in the storage unit 9 corresponding to the reservation number is
Ten reservations are made to store measurement conditions in the memories M ₁ , M _{2 .} . . M ₁₀ , respectively. Incidentally, if the above-mentioned reservation operation is interrupted in the middle, when the reservation key 6 is pressed again, the reservation contents up to the point where the setting key 4 was pressed are updated. For example, if you want to modify only the target value, enter the target value on the numeric keypad in the above reservation procedure.
, press the setting key 4, and then press the reservation key 6.
If you press , the reservation operation ends and only the target value in the reservation is updated.

After the reservation operation is completed, the last reserved memory content is recalled, the target value and upper limit value are output to the combination calculation control section 15, and the intensity and time of the dispersion feeder are determined by the dispersion feeder drive section. 1
6, and the intensity and time of the radiation feeder are output to the radiation feeder drive unit 17. Here, i memories in storage unit 9, in this case 10 memories.
M ₁ , M ₂ . . . M ₁₀ are memories for setting the weighing conditions of the object to be weighed and reserving them by reservation operation, but the i+1th, ie, the 11th memory M ₁₁ stores the weighing conditions in advance. When performing weighing work on objects to be weighed other than those reserved in _the memories _{M 1 , M 2 .}
The object to be weighed is the same as the object to be measured stored in one _of the M This is a memory for temporarily storing measurement conditions such as target value, upper limit value, intensity and time of the dispersion feeder and radiation feeder. Therefore, the operation procedure for setting the weighing conditions to the memory _M11 is almost the same as the reservation operation described above, as shown in FIGS. 1 and 3, but instead of pressing the reservation key 6 in the reservation operation, By pressing the set value key 5 and performing the same operations as the above-mentioned reservation operation, the predetermined measurement conditions are stored in the memory _M11 . In this case, after the settings are completed, the stored contents of the memory _M11 are recalled, the target value and the upper limit value are output to the combination arithmetic control section 15, and the intensity and time of the dispersion feeder are output to the dispersion feeder drive section 16, which emits radiation. The feeder intensity and time are output to the radiation feeder drive unit 17, and by pressing the operation key (not shown),
Start the operation of the combination weighing device.

Next, in the calling operation, the data input section 1 installed on the operation box as shown in FIGS.
Each time the reservation call key 2 is pressed, the count section 13
The reservation number is counted up sequentially. In the counting unit 3, when the reservation number reaches 10 and the reservation call key 2 is further pressed, the reservation number 11 is only set each time and is not a reservation value, so it is skipped and the first reservation number 1 is called. In this way, the reservation number is called cyclically. In response to a reservation number calling command from the counting section 13, the measurement conditions stored in the memory in the storage section 9 corresponding to the reservation number are read out by the readout control section 11 and displayed on the display section 12. Among the read measurement conditions, the target value and upper limit value are output to the combination calculation control section 15, the intensity and time of the dispersion feeder are output to the dispersion feeder drive section 16, and the intensity and time of the radiation feeder are output to the radiation feeder drive section 16. It is output to section 17. If a set of measurement conditions is reserved as described above, each condition can be set from now on simply by calling up the reserved value at the time of a combined measurement operation. Actually, the above calling operation is performed while the combination weighing device is stopped. Then, by turning on an operation key (not shown), the operation of the combination weighing device is started.

Finally, in the feeder change operation, changes are made to four items of the measurement conditions, including the intensity and time of the dispersion feeder and the intensity and time of the radial feeder. For example, when changing the dispersion feeder strength as shown in FIGS. 1 and 5, if you press the key for increasing the dispersion feeder strength among the feeder setting keys 7, A command is sent to the feeder changing unit 14,
Moreover, the intensity stored in the memory is displayed on the display unit 12. When the above-mentioned key to increase the intensity is held down, the intensity is counted up by one due to a timer operation, the intensity is displayed on the display section 12 and updated in the memory, and the updated intensity is output to the dispersion feeder drive section 16. be done. If the above-mentioned key is further pressed, the above-mentioned operation is repeated, and the intensity can be changed up to the maximum intensity of 9. In addition, when weakening the dispersion feeder strength, when the key for weakening the dispersion feeder strength is pressed among the feeder setting keys 7, a command is sent to the feeder change unit 14 via the key discrimination control unit 8, and the display unit 12 displays a message in the memory. The memorized intensity will be displayed. When the above-mentioned key for weakening the strength is held down, the strength is counted down by one by a timer operation, the strength is displayed on the display unit 12, and updated in the memory, and the updated strength is output to the dispersion feeder drive unit 16. . If the above-mentioned key is further pressed, the above-mentioned operation is repeated, and the intensity can be changed down to the lowest intensity of 0. Below, the time of the dispersion feeder and the intensity and time of the radial feeder are also similar to the above operations. Note that this kind of feeder change operation is necessary because of changes in the lot status of the objects to be weighed, the work environment, etc. while the weighing operation is being performed using the reserved value.
Overweight or light weight measurement errors may occur one after another.
This is because the supply amount must be finely adjusted to return to normal metering.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but a special key corresponding to the reservation number is installed on the operation box, and by pressing the key, the object to be weighed is selected from the memory corresponding to the reservation number in the storage section. It is also possible to carry out a calling operation such as reading out and setting the measurement conditions of . Alternatively, the reservation number may be entered using a numeric keypad, and the measurement conditions may be read out from the memory corresponding to the reservation number in the storage section and set.

Effects of the Invention As explained above, according to the present invention, even if it becomes necessary to newly set the measurement conditions each time the object to be measured or the target value changes, the measurement conditions can be reserved in the reservation operation. If this is done, settings can be easily changed simply by a calling operation, and the setting time can be shortened. Once the weighing conditions are stored in memory in this way, you can select and recall the necessary weighing conditions, so no skill is required. The possibility of this is extremely small, and operability, workability, and productivity are dramatically improved even when weighing a variety of objects to be weighed and a variety of target values.

[Brief explanation of the drawing]

FIG. 1 is an equivalent block circuit diagram of a combination weighing device according to an embodiment of the present invention, FIG. 2 is a flowchart showing the procedure of reservation operation, FIG. 3 is a flowchart showing the setting procedure using the set value keys, and FIG. 4 5 is a flowchart showing the procedure of the calling operation, and FIG. 5 is a flowchart showing the procedure of changing the strength of the dispersed feeder among the steps of the feeder changing operation. 6th
The figure is an explanatory diagram of a combination weighing device. 1... Specifying means (data input section), 9... Storage means (storage section), 11... Reading means (reading control section), 15... Calculating means (combination calculation control section),
16, 17...driving means (dispersion feeder driving section,
radiation feeder drive unit), 21, 23... feeding device (dispersion feeder, radiation feeder), 26, 27...
Weighing machine (weighing hopper, weight detector).

Claims (1)

[Scope of Claims] 1. In a combination weighing device that measures the weight of objects to be weighed using a plurality of weighing machines and performs a combination calculation to obtain a combination that is equal to or close to a target value, a target value necessary for combination measurement. A memory section stores in advance a plurality of measurement conditions corresponding to the object to be weighed as reserved values, and a necessary reserved value is retrieved from the storage section from the plurality of reserved values corresponding to the object to be weighed. a readout control means, and the storage unit includes a memory for storing a plurality of reserved values and a memory for storing measurement conditions that are changed each time, and at least one of the reserved values is changed by the input means. A combination weighing device characterized in that the reserved value is stored and updated with the changed value, and the combination weighing device is driven and controlled based on this.