JPH03249523A - Weighing device - Google Patents

Abstract

PURPOSE:To prevent weighing operation from being interrupted by providing a battery and a weight display unit to a scale part provided independently of a weighing device main body, and switching the power source to the battery by a power source switching means in the case of a power failure and displaying a weighed value on the display unit. CONSTITUTION:The weighing device main body 1 receives commercial electric power from a power source plug 4 and supplies it to the scale part 5 through a cord 7. When the scale part 5 weighs postal matter, its weight data is sent to the main body 1 through a signal line 7 to calculate the postal charge, which is displayed on an operator display unit 3 and a customer display unit 8. If the commercial power supply enters a failure state, the changeover switch of the scale part 5 is operated to switch the working power source to the battery and then the weighing operation is carried on, so that weight data are displayed on a liquid crystal display plate 6. Consequently, even if the power supply is interrupted, the weighing operation is carried out in scale part units and the result is displayed, thereby preventing the weighing operation from being interrupted.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a weighing device equipped with an electronic scale.

[Prior Art] Conventionally, a weighing device, a so-called postage scale, which measures the weight of mail items such as sealed letters and parcels to calculate postage charges, has a weighing unit equipped with an electronic weight sensor such as a load cell,
There is known an electronic postage scale that is provided separately from a weighing device that takes in the weight data of the mail items weighed by the weighing section, calculates the corresponding postage, and displays it on a display. . In this device, the weighing section and the weighing device body are connected by a power line and a data signal line.
The weighing section was designed to operate using power supplied from the weighing device itself. This has the advantage that the weighing section can be installed at the optimum position suitable for the application. On the other hand, the measuring device main body does not have a built-in battery or the like as a power source for operation, but is supplied with commercial power from an external source. Therefore, if the power supply to the scale section is cut off due to a commercial power outage or a failure of the weighing device itself, the postage scale will not be able to function as a scale at all, which will interfere with mail reception operations. was.

[Problem to be solved by the invention] As mentioned above, in the conventional weighing device of this type,
In the event of a power outage, it cannot function as a scale at all, but when used as a postage scale, there is a problem in that it interferes with mail reception operations.

Therefore, the present invention has a built-in battery for operation in the weighing section and a weight display, so that even if the power supply from the weighing device main body is cut off, the weighing section itself can perform weighing operations, and even if the power is cut off, the weighing device The purpose of the present invention is to provide a weighing device that eliminates the risk of hindrance to weighing operations even if a failure of the main body occurs.

[Means for Solving the Problems] The present invention includes a weighing section that electrically measures the weight of an object to be weighed;
A weighing device main body that takes in and processes the weight data of the object to be weighed weighed by this weighing section is provided separately, and the weighing device and the weighing device main body are connected via a power line and a data signal line. In the weighing device, the weighing section is
In addition to having a battery and a weight indicator, a power supply switching means is provided for switching the operating power supply from the power supply supplied from the weighing device body through the power line to the battery, and when the operating power supply is switched to the battery by the power supply switching means. The weighing value of the object to be weighed is displayed on the weight display.

[Function] With the present invention having such a configuration, when the power supply from the weighing device main body through the power line is interrupted, the power source for operation is switched to the battery by the power source switching means, and then the weighing device The weight data of the object to be weighed is displayed on the weight display as a measured value. Therefore, when the present invention is applied to a postage scale, even if the power supply to the weighing section is cut off due to a power outage of the commercial power supply, the weighing section can operate by itself, so that at least the weighing of mail can be carried out.

[Embodiment] Hereinafter, an embodiment in which the present invention is applied to the postage scale system shown in FIG. 1 will be described with reference to the drawings.

In Fig. 1, 1 is the main body of the weighing device, and a keyboard 2 on the front of the housing is used to input data related to mail items, etc.
An operator display 3 is attached to the upper part of the casing for displaying the weight value of mail, postage, etc. This measuring device main body 1 has a power plug 4
It can be operated by connecting it to a commercial power outlet and receiving power.

Reference numeral 5 denotes a fourth section equipped with a load cell as an electronic weight sensor, and a liquid crystal display panel 6 for weight display is provided on the front surface. The weighing section 5 and the weighing device main body 1 are as follows:
They are connected by a cord 7 consisting of a power supply line and a data signal line.

Further, a customer display 8 and a certificate stamp issuing machine 9 having the same configuration as the operator display are detachably connected to the weighing device main body 1, respectively.

FIG. 2 is a block diagram of the weighing section 5. As shown in FIG.

As shown in the figure, the program R
OM, a memory section 13 consisting of data RAM, etc., an A/D (analog/digital) converter 16 that converts the analog output from the load cell 15 amplified by the amplifier 14 into a digital count value, and drives the liquid crystal display board 6. A data signal line 1 is connected between a display controller 17 that controls and displays display data, and the measuring device main body 1.
A communication interface 19 that controls data transmission via 8 is connected to each.

Further, the +12 volt DC power supplied from the measuring device main body via the power line 20 is taken in and transformed to a predetermined voltage, and the CPU 1, the load cell 15. Amplifier 14
．． A power supply circuit 21 that supplies the RAM and the like of the memory section 13 is built-in. The power supply circuit 21 is further connected to an operating battery 22 and a changeover switch 23 for switching the operating power from the power supplied via the power line 20 to the battery 22. In addition, when this changeover switch 23 is in the OFF state, the power supplied via the power supply line 20 is selected as the operating power source, and when it is in the ON state, the battery 22 is selected as the operating power source.
is selected.

Therefore, the CPU II is +5 from the power supply circuit 21.
When power is supplied to the volt, the load cell 15 is configured to execute the process shown in FIG. 3 based on the program stored in the ROM of the memory unit 3. When it is detected that an object has been weighed,
Take in count value data output from the A/D converter 16, convert this count value data into weight data,
Furthermore, rounding processing is performed at a predetermined level. Thereafter, the state of the switching switch 23 connected to the power supply circuit 21 is checked, and if the switch 23 is in the OFF state, the rounded weight data is sent to the weighing device main body 1 via the one communication interface. Send.

On the other hand, if the switch 23 is in the ON state, the rounded weight data is converted into weight value display data,
The weight is displayed on the liquid crystal display board 6 via the display controller 17.

In this embodiment configured in this way, power is normally supplied by connecting the power plug 4 of the measuring device main body 1 to a commercial power outlet, and the measuring device main body 1
At the same time, the power is also supplied to the weighing section 5 through the power supply line 20, and the weighing section 5 also becomes operable.

In this state, when the weighing unit 5 weighs the mail,
The weight data is given to the weighing device main body 1 through the data signal line 18, and the main body 1 calculates the postage according to the weight value. The weight value and postage are then displayed on the operator display 3 and the customer display 8.

Further, when a certificate stamp issuance is instructed by a key operation on the keyboard 2, a certificate stamp for postage is issued from the certificate stamp issuer 9. In this way, the mail reception service is performed.

By the way, if the weighing device main body 1 becomes inoperable due to, for example, a power outage of the commercial power supply, the changeover switch 23 provided on the weighing section 5 may be turned on. By doing so, the operating power source of the weighing section 5 is switched to the battery 22, and the weighing section 5 is maintained in an operable state. Then, when the mail is weighed by the weighing section 5 in this state, the weight data is displayed on the liquid crystal display board 6.

Therefore, even if the weighing device main body 1 becomes inoperable due to a power outage or failure of the commercial power supply, by turning on the changeover switch 23, the scale section 5 will be operated by the built-in battery 22, and the mail will be weighed. It can be carried out. The weighing results are displayed on the liquid crystal display board 6 provided on the front surface of the weighing section 5, so that the weight of the mail can be known from the displayed content, and the postage can be calculated manually.

Therefore, there is no risk of any hindrance to mail reception operations.

Further, since the weighing section is normally operated by power supplied from the weighing device main body 1, the battery 22 can be saved. Furthermore, since the weighing section 5 is not provided with a power plug, there is no restriction on the installation position, and the weighing section 5 can be installed at a desired position suitable for the application, as in the conventional case.

Note that the present invention is not limited to a postage weighing system, and includes a weighing section that electrically measures the weight of an object to be weighed, and data on the weight of the object weighed by this weighing section. The present invention can be applied to all types of weighing devices in which the main body of the weighing device for processing is provided separately. In addition, even if the job is to process and output the weight data measured by the weighing unit using the weighing device itself, and data processing becomes impossible due to a power outage or failure of the weighing device, etc.
This is effective at least in a commercial weighing device that can be supplemented by just a weighing operation.

Further, in the above embodiment, the operating power source was manually switched using the changeover switch 23, but a power outage detection circuit is connected to the power supply circuit 21, and the operating power source is automatically switched to the battery 22 in response to a power outage detected in the measuring device main body 1. It may be possible to switch.

It goes without saying that various other modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] As detailed above, according to the present invention, there is provided a weighing section that electrically measures the weight of the object to be weighed, and a weighing section that takes in the weight data of the object weighed by the weighing section. In a weighing device in which a weighing device main body that calculates and displays charges on a display is provided separately, and the weighing device and the weighing device main body are connected via a power supply line and a data signal line, the weighing device operates on the weighing device. In addition to a built-in battery, the weighing device is also equipped with a weight display, making it possible for the weighing unit to perform weighing operations even if the power supply from the weighing device is cut off, so even if a power outage or malfunction of the weighing device occurs, It is possible to provide a weighing device that eliminates the risk of hindrance to weighing operations.

[Brief explanation of drawings]

The drawings are diagrams showing an embodiment of the present invention, in which Fig. 1 is a schematic diagram of a postage scale system, Fig. 2 is a block configuration diagram of a weighing section, and Fig. 3 is an operation of the weighing section related to the present invention. FIG. DESCRIPTION OF SYMBOLS 1...Measuring device main body, 5...Weighing part, 6...Liquid crystal display board, 15...Load cell, 18...Data signal line, 0...Power line, power supply circuit, 2... Battery, 3... Selector switch.

Claims (1)

[Scope of Claims] A scale unit that electrically measures the weight of an object to be weighed, and a weighing device body that takes in the weight data of the object weighed by the scale unit, calculates a charge, and displays it on a display. In the weighing device, the weighing device is provided separately, and the weighing device and the weighing device main body are connected via a power line and a data signal line. a power supply switching means for switching the power supply from the power supply supplied from the weighing device body through the power line to the battery; and a power supply switching means for switching the power supply for operation to the battery by the power supply switching means; A weighing device comprising a weight display control means for displaying the weight on a display.