JP2002350223A - Metering device with false metering preventing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metering device with good work efficiency by minimizing the man-made mistake without depending upon a worker's memory and judgment in humanly assisted metering work. SOLUTION: In this metering device, a material to be metered is placed and its weight is measured. The device is provided with a means for selecting whether tare subtraction is carried out or not, and a means for setting and storing a preload value for judging whether it is tare weight or not. The device includes an automatic tare subtraction means for taking the load as tare amount and storing it in a tare weight storage means when the load first placed on the metering device exceeds the preload value, and a tare subtraction releasing means for erasing the stored value stored in the tare weight storage means when the weight equal to or lower than the above preload value is placed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for filling a container or a bag or the like with an object to be weighed by using a digitally-displayed weighing device. The function relates to a tare function of setting a zero as a zero.

[0002]

2. Description of the Related Art As means for measuring the weight of an object to be weighed,
Recently, digital measuring instruments have been widely used. For example, there is a digital platform scale. When an object to be weighed is placed on a platform, the weight of the object is digitally displayed. A more detailed description of the use of this method is as follows.When measuring a certain amount of an object to be weighed using a predetermined container with this platform scale, the general weighing procedure is that the indicated value immediately before use is zero. Begin by checking. Next, only the above-mentioned container is placed on the platform of the balance, a tare operation is performed, and the indicated value is made zero with the container placed.
When the object to be weighed is supplied to the container on the mounting table and the display value of the scale indicates the target value, the supply is stopped and one weighing operation is completed. Then, the container containing the predetermined amount of the object to be weighed is lowered from the scale, the contents of the container are moved to a predetermined place, and the emptied container is placed on the platform of the scale again to prepare for the next measurement. In this case, since one container is used repeatedly, taring can be performed only once. Another way to measure is to first weigh and memorize the empty container, take the container off the scale, take it to another place, put the object to be weighed in the container and put it together with the container. When the balance is again put on the balance, the total weight of the object and the container is displayed. Therefore, there is a method in which when a tare weight key is pressed, the previously measured tare amount is subtracted from the total weight and only the net weight value is displayed.

[0003]

In the case of performing a weighing operation as described above with a conventional digital weighing machine, there is no weighing procedure, so if the operator is familiar with the operation method of the scale, the problem will be a problem. Absent. However, there are cases where a plurality of different containers are filled with a predetermined amount. In such a case, the tare is often not constant, so it is necessary to perform the tare operation every time. It is possible to check whether the tare is being done with a lamp that is being tared, but if you are repeatedly performing the work, you may overlook the confirmation of the lamp that is being tared or forget the tare operation When the container is put on the scale, the object to be weighed may be put in immediately. Some commercially available scales have a tare value display so that the tare value can always be checked.However, the simpler the task, the more the same operation is repeated, so you may forget to see the tare value display. The previous tare value is mistaken for the current tare value. If the procedure goes wrong in this way, all weighing values will be erroneous weighing values. For this reason, sometimes a weight checker is provided at the latter stage of the weighing machine to reconfirm the weight, but this adds extra work, and not only does not reduce product loss but also increases work efficiency. A new problem of lowering has arisen.

[0004]

SUMMARY OF THE INVENTION As described above, the present invention provides a weighing machine with high working efficiency which minimizes weighing errors due to human error in weighing work involving humans. According to the invention, in a weighing device for placing and weighing an object to be weighed, erroneous weighing prevention means is provided, and a tare selection means for selecting whether or not to execute tare is predetermined. A weight value setting unit that sets a weight value as a preload amount value is provided, and a predetermined weight value is set as the preload amount value in the weight value setting unit.
When the taring is executed by the tare selecting means, when the load initially loaded on the measuring instrument is not tared, the display is blinking and the load is set by the load value setting means. Means for stopping the blinking display when the preload amount value is exceeded and storing the load displayed at that time as the tare amount in the tare weight value storage means, and at the same time zeroing the blinking display where the blinking display is stopped. When the load including the tare amount and the object to be weighed added to the tare amount is removed from the weighing device, the stored value stored in the tare weight value storage means is erased and the tare is released. And a blinking display when the load initially loaded on the weighing device is equal to or less than the preload amount value set by the weight value setting means. And a zero point return for erasing the stored value in the storage means stored in the tare weight value storage means as the tare amount and simultaneously displaying the weight display in which the blinking display is stopped to zero. I have.

[0005]

In the weighing device with an erroneous weighing prevention function according to the present invention, the approximate weight of a container (bag) serving as a tare is checked before starting weighing. If there are a plurality of containers, the range from the lightest to the heaviest is checked beforehand, and the weight value setting means sets a lighter weight value than the lightest one of the preceding containers (for example, half of the lightest one). Weight value) is set and stored by the weight value setting means as a preload amount value, that is, a predetermined weight value. At this stage, the scale is temporarily displayed as zero. Next, whether to use the erroneous weighing prevention function is selected. This is a selection of whether or not to automatically perform taring, which is mainly determined by a measuring instrument manager at the workplace. For now, consider a mode in which taring is performed.

Therefore, a case where white rice is measured in a plurality of containers each having a different tare will now be described as an example.
Now, the amount to be measured is 30 kg, there are multiple containers, and the tare amount (weight of empty container) of those containers is 1 kg to 2 kg.
It is assumed that various preparations have been made. As mentioned above,
If the tare amount is from 1 kg to 2 kg, the preload amount value is half of the lightest tare amount, so 0.5 kg is set as the preload amount value by the weight value setting means. Then, an empty container is placed on the platform of the measuring instrument. Then, the instruction of the measuring instrument blinks the weight of the empty container. Since this container naturally exceeds the predetermined weight value, the display becomes a zero point display, and the weight of the empty container is tared and stored in the tare weight value storage means. In this state, white rice can be put into the empty container. Therefore, the operator continues to insert the contents while watching the display until the display reaches the target weight value. When the operator reaches the target weight value, the operator stops the input and completes the weighing. On the other hand, when a container or bag having a lighter tare amount than the previously set preload amount value is placed on the measuring device, the tare amount is not detected and the tare function is not activated. If there is something stored as the tare, it is cleared, and the display shows the weight value of the container or bag that has just been loaded. When the container or bag is removed from the scale, the tare is canceled and the display becomes zero.

In the present invention, the weights of the containers and bags to be used are checked in advance, the weights are set to be lighter than the weights of the containers and bags, and when the container is tared, the weight is first put on. If the applied load exceeds the above set load, the blinking display at that time is cleared and stored as the tare amount in the tare weight storage means. It is not necessary to constantly check the presence or absence of taring, and it is possible to concentrate on a predetermined weighing operation, and work efficiency is good. Also, after the prescribed weighing work is completed,
When the operator lowers the container or the like from the scale, the load on the platform becomes equal to or less than the preload amount value, and it is determined that the load of the container or the like has been removed from the scale, and the tare mode is removed.
Even if the tare amount changes every time, the previous tare amount is not used as it is, so that an erroneous weighing due to a human error as in the related art can be prevented.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a weighing device with an erroneous weighing prevention function according to the present invention. Reference numeral 1 denotes a weighing unit incorporating a sensor for detecting a load, and 2 denotes a mounting table on which an object to be weighed such as a container is placed. Reference numeral 3 denotes an indicating unit. When an object to be weighed is placed on the mounting table 2, the load is converted into a weight signal proportional to the load by a load detection sensor (not shown) incorporated in the weighing unit 1 and sent to the indicating unit 3. Can be Reference numeral 4 denotes a group of operation switches including keys for setting a preload amount value and for giving a tare subtraction command. Reference numeral 5 denotes a display unit for displaying each weight value. 6 is an example of a container, 7 is an object to be weighed.

FIG. 2 is a block diagram showing the configuration of the present invention. The weight signal from the weighing unit 1 is input to the A / D converter 8, converted into a digital signal, and transmitted to the arithmetic and control unit 9. Then, a normal weight display is displayed on the display unit 5, and the arithmetic control unit 9 digitally calculates the weight signal from the A / D converter 8 and the signal from the storage unit 11, so that the load on the balance is calculated. In addition to making a determination as to whether or not is a tare, a check is also made as to whether a zero-point check or an operation to use the erroneous weighing prevention function is performed, or a check of the progress of the tare subtraction program. An operation switch 10 is provided outside the operation unit. Reference numeral 11 denotes a storage unit for sequentially storing a preload value, a tare weight, and the like set and input by the operation switch 4. Reference numeral 12 denotes a signal output unit for outputting a display warning or the like for notifying an abnormality, and the display unit 5 also displays them. Also, a list of various operations can be displayed on the display unit 5 and necessary procedures and items can be selected from the list and stored in the storage unit 11. Reference numeral 13 denotes a printer for printing weight values and the like, and 14 denotes a power supply unit.

FIG. 3 shows an operation sequence in a general weighing method. At the start, the scale is powered on first. For a while, the figure of 8 flashes, for example, four digits, so as to warm up the electric circuit. After that, the display becomes zero and the balance can be used as a normal scale. Now check if the display is zero. Now put the tare. Then, tare is performed by key operation. Then, the object to be weighed is supplied, and when the predetermined amount is reached, the transfer is stopped. This completes one weighing operation, but the object to be weighed (both containers) is lowered from the scale, and the operation of canceling the tare by key operation is performed in preparation for the next weighing operation. When taring is performed and the net weight is weighed as in this example, the operator performs the taring operation and the release operation in and. This is where the operation is forgotten as described above.

FIG. 4 shows an embodiment of the present invention, and corresponds to FIG. 3 which is a flow chart for performing an automatic tare operation for preventing an operation from being forgotten. First, in F1, it is determined whether or not the erroneous weighing prevention function is to be used, and if not, the processing section is terminated. If it is to be used, the process proceeds to F5, and it is determined whether or not the container is being tared. This is first instructed to tare by the operation switch, and when the previous tare can be repeatedly used, YES is set during tare and F1 is set.
The process proceeds to step 5, where the blinking display is turned off, a normal display (zero display) is set, and the processing section is terminated. However, when the tare is not being performed, that is, when a new tare needs to be performed or when the first tare operation is performed, the step of this flowchart proceeds to F10, and the weight value currently loaded is blinked. ing. Thereafter, the process proceeds to F20, where it is determined whether or not the preload amount value is exceeded (a value set in advance). If the tare placed on the platform exceeds the preload value, confirm the stability of the balance's instruction. If the balance is not stable, terminate this processing unit. Is transferred to the tare memory and the processing is terminated. Therefore, as a result, when the tare is put on the balance, the scale is displayed as zero when the tare is put on.
Displays only the net weight.

FIG. 5 is a flowchart showing the automatic cancellation of the tare cancellation in the embodiment of the present invention, which corresponds to the operation sequence shown in FIG. First, in F50, it is determined whether or not the erroneous weighing prevention function is to be used. If not, the processing section is terminated. If it is to be used, the process proceeds to F55 to determine whether or not the container is being tared. If the container is not being tared, this processing section is terminated. If the preload amount value is exceeded, the result is NO, and this processing section is terminated. If the preload amount value is not more than YES, it is determined that the article has been unloaded from the scale. Release the pull. By executing such a routine, tare cancellation or tare cancellation is automatically performed, and weighing cannot be performed with the same tare. Therefore, erroneous calculation due to different tare can be prevented.

[Brief description of the drawings]

FIG. 1 is an external view of a weighing device with an erroneous weighing prevention function according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of a measuring device according to the present invention.

FIG. 3 shows an operation sequence of a general measuring instrument.

FIG. 4 is a flowchart illustrating automatic taring according to the present invention.

FIG. 5 is a flowchart illustrating automatic tare cancellation according to the present invention.

[Description of numbering]

 DESCRIPTION OF SYMBOLS 1 Weighing diagram 2 Platform 3 Indication part 4 Operation switch 5 Display part 6 Container 7 Weighing object 8 A / D conversion part 9 Operation control part 10 Operation part 11 Storage part (memory) 12 Signal output part 13 Printer 14 Power supply part

Claims (1)

[Claims] An weighing instrument for placing an object to be weighed and measuring the weight thereof is provided with an erroneous weighing preventing means, and a tare selecting means for selecting whether or not to tare, and a predetermined tare selecting means. Weight value setting means for setting a predetermined weight value as a preload amount value, and a predetermined weight value is set as the preload amount value in the weight value setting means, and tare is executed by the tare selection means. When the load is initially applied to the weighing device, the display is blinking when the load is not tared, and when the load exceeds the preload amount value set by the weight value setting means, The flashing display is stopped, and the load displayed at that time is stored as a tare amount in the tare weight value storage means, and at the same time, the weight display having stopped the flashing display is zero-displayed. When the load including the object to be weighed added to the tare amount and the tare amount is removed, a tare canceling unit that erases the stored value stored in the tare weight value storage unit and cancels the tare cancellation is provided. Further, when the load initially loaded on the weighing device is equal to or less than the preload amount value set by the weight value setting means, the blinking display is stopped and stored as the tare amount in the tare weight value storage means. A weighing instrument with an erroneous weighing prevention function, comprising: a zero-point resetting means for erasing the stored value and displaying the weight display whose blinking display has been stopped to zero at the same time.