JPH0743198A - Electronic rate balance - Google Patents

Abstract

PURPOSE:To easily perform the replacement or specification change of a part not participating in a test such as weighing method. CONSTITUTION:An electronic rate balance has a base 22 formed to partition a weighing housing part 22b for housing a load cell 12, an A/D converter 20, and a weighing I/O board 21; a printer housing part 22a for housing a main printer formed of a printer mechanism part 6b and a cartridge part 6c; and a general housing part 22c for housing a PC block 23 and other parts, respectively, a main cover 11 and dip switch cover 14 for blocking and sealing the weighing housing part 22b, a light cover 19 for blocking the printer housing part 22a together with the main cover 11, and a left cover 18 and bottom cover 28 for blocking the general housing part 22c, and only the main cover 11 and the dip switch cover 14 are sealed after test.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic toll scale incorporating a personal computer, for example.

[0002]

2. Description of the Related Art In an electronic charge balance, a weight measuring element such as a load cell for measuring the weight of a product and a processing circuit for the measurement signal thereof, calculation of a weight value from measured data, and price from the calculated weight value. Regarding the parts related to weight and price, such as calculation processing of calculation, display processing of weight, unit price, price, etc., public standards are stipulated by laws such as the Measurement Law, and electronic price scales are manufactured and sold. At the time of remodeling and repair, the test such as the Measurement Law is applied.

In the conventional electronic toll scale, all parts were housed in one case, and the removal of this case was sealed.

That is, the members that serve as the center of measurement, such as the load cell and the circuit for adjusting the detection signal of the load cell, have been the subject of official standards such as the Measurement Law. Such a case that accommodates the member that is the center of measurement has been sealed for removal so that the member that is the center of measurement described above cannot be replaced or adjusted after verification.

For this reason, the above-mentioned member serving as the center of weighing is housed in one case together with the members such as the power supply circuit not directly involved in the weighing, and this case is sealed so as not to be removable.

[0006]

In recent years, there has been a demand for improvement of services, and accordingly, improvement of operability and support of a wide range of applications are also required for electronic fee scales. In order to meet this demand, an electronic fee scale that is integrated with a weighing unit that performs processing related to verification of the measurement method and a personal computer that performs processing not related to verification can be considered.

[0007] Further, due to recent technological advances, personal computers have also advanced, and higher-speed models have been developed. In addition, new materials have been developed, and various parts with high performance have been developed.

In order to cope with such technological progress, it is necessary to replace various parts including a personal computer. However, in the conventional electronic toll scale, the parts involved in the verification and the parts not involved in the verification are mixed and stored in one case, and the case is sealed so as not to be removed. Even in the case of the replacement, there was a problem that the case had to be unsealed, the parts replaced, and then the test had to be performed again.

Further, in this electronic charge balance, since the personal computer is integrally formed, it is necessary to maintain and change the specifications of the personal computer and its application program in response to the user's request. However, if the personal computer is stored together with the parts involved in the certification in a case, and the case is sealed so that it cannot be removed,
There is a problem that the hardware of the personal computer cannot be directly operated, and the maintenance and specification change of the personal computer and its application program cannot be easily performed.

Therefore, the present invention provides an electronic fee scale which allows easy replacement and specification change of parts which are not involved in official standard verification, with parts and the like involved in official standards such as the Measurement Law sealed. The purpose is to

[0011]

SUMMARY OF THE INVENTION The present invention is intended to measure the weight of a product in an electronic charge balance that measures the weight of the product, calculates the price of the product, and displays the weight and price. A weight weighing element, a non-volatile memory storing a program for processing relating to weight and price, and a central processing unit for weighing that performs processing relating to weight and price based on the program stored in the non-volatile memory. , An application memory storing a processing program not related to weight and price, a general-purpose central processing unit for performing processing based on the program stored in the application memory, a weight weighing element, a non-volatile memory, and a central processing unit for weighing A general-purpose unit for accommodating a general-purpose unit including an application memory and a general-purpose central processing unit. A storage unit, a partition member that partitions the scale unit storage unit and the general-purpose unit storage unit, an exterior member that closes the general-purpose unit storage unit, and a sealing exterior member that closes the scale unit storage unit and seals its removal. Is provided.

[0012]

In the present invention having such a structure, the sealing exterior member that closes the storage portion of the balance portion is sealed so that it cannot be removed after the measurement method or the like is verified.

However, since the exterior member for closing the general-purpose part storage part does not need to be sealed, it can be removed freely.
The specifications of the application memory and general-purpose central processing unit can be freely changed and replaced. Moreover, it is not necessary to undergo re-verification such as the Measurement Law after changing and replacing the specifications of the application memory and the general-purpose central processing unit.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an electronic charge balance 1 to which the present invention is applied.
1 is a perspective view of the apparatus main body 2 and an operation / display section 4 fixed to the apparatus main body 2 above the apparatus main body 2 by connecting pipes 3a and 3b.

A balance plate 5 is provided on the upper part of the device body 2, and a circuit for processing a load cell and its output signal and an application process are provided on the lower part of the balance plate 5 inside the device body 2 as described later. A personal computer or the like for performing the above is provided.

As will be described later, a main printer for printing labels or receipts is housed inside the right side of the main body 2 of the apparatus, and 6a is a label for printing or issuing a label issued by the main printer. / This is the receipt issue port.

The upper surface of the operation / display unit 4 is inclined at a predetermined angle so that the operator can easily see it, and an LCD (liquid crystal) for the operator (Vendor side) is provided.
Display) A display (640 × 480 DOTS) 7 and a keyboard 8 are provided, and a sub-printer 9 can be optionally installed.

Although not shown, a fluorescent display (256 × 64 FULL DOTS) 10 for a customer (Customerside) is provided on the back surface of the operation / display unit 4. FIG. 2 shows an exploded view of the apparatus body 2.

Reference numeral 11 is a main cover whose bottom and side faces are open. An opening 11a for allowing the load cell 12 to project is provided on the upper surface of the main cover 11,
The load cell 12 protruding through the opening 11a and the weighing pan 5 are connected to each other without being supported by the pan support 13, and the weighing pan 5 is supported by the load cell 12 through the pan support 13. Has been done.

On the upper surface of the main cover 11, four protrusions 11b, 11c, 11d, 11 forming an X-shaped groove are formed.
e is formed, and the tray support 13 enters the X-shaped groove,
This tray support 13 is prevented from being caught. A window portion 11f for operating a dip switch described later is formed on the upper surface of the protrusion table 11c, and a plurality of air holes 11g are formed on the upper surface of the protrusion table 11e. The window portion 11f has a dip switch cover 14
The DIP switch cover 14 is sealed after the verification so that it cannot be removed.

The main cover 11 and the dip switch cover 14 constitute a sealing exterior member.

An opening is formed in a part of the lower end of the front surface of the main cover 11, and a floppy disk cover 14 is detachably attached to the opening.
The rating plate 16 is also attached to the front surface of the main cover 11.

A fixing hole into which the connecting pipes 3a and 3b are inserted is formed on the back surface of the main cover 11, and the fixing hole is provided by a rear cover 17 detachably provided on the back surface of the main cover 11. The connection pipes 3a and 3b inserted in the are fixed.

A left cover 18 as an exterior member is detachably provided in an opening on the left side of the main cover 11, and a right cover 19 as an exterior member is detachably provided in an opening on the right side thereof. ing.

The load cell 12 is an A / D converter 2
0 is electrically connected to the A / D converter 20,
It is electrically connected to the measurement I / O (input / output) board 21. The weighing I / O board 21 is provided with a circuit of a control unit for performing processing relating to weight, unit price and price, and is operated only when changing program data of processing relating to weight, unit price and price. The switch 21a is provided on the I / O board 21.

The base 22 as a partition member has a structure in which unevenness is formed on the upper surface and the lower surface of the base 22 to partition it into three parts. That is, the upper surface of the right side portion has a concave shape, and the printer housing portion 22a for housing the printer mechanism portion 6b and the cartridge portion 6c constituting the main printer is formed on the upper surface side. Further, the rear side portion thereof has a convex shape with respect to the printer storage portion 22a, and has a middle shape which is concave with respect to the convex front surface side portion, which will be described later.
A / D converter 20 and a weighing section storage section 22b as a weighing section storage section for storing the weighing I / O board 21 are formed. Further, the upper surface of the front surface side portion is convex, that is, the concave shape with respect to the lower surface side. A general-purpose storage section 22c for storing the disk device 25, the power supply unit 26, and the power supply cord section 27 is formed. The convex shape of the general-purpose storage section 22c extends to the back side between the printer storage section 22a and the weighing section storage section 22b so as to partition the printer storage section 22a and the weighing section storage section 22b. It can be.

The upper surface of the base 22 is closed by the main cover 11, and the main cover 11 is sealed after the verification so that it cannot be removed. Therefore, the weighing unit storage unit 22b is completely attached to the main cover 1.
It is blocked by 1, and the seal makes it impossible to easily replace the internal parts and change the specifications. On the other hand, in the printer housing section 22a, parts such as label paper and specifications can be easily changed by the light cover 19. The bottom surface of the base 22 has a bottom cover 2 as an exterior member provided with a fan 28a.
The general-purpose storage section 22c is closed by 8, and the bottom cover 28 and the left cover 18 can replace the internal parts and change the specifications.

The printer mechanism section 6b is composed of a print head and a sheet conveying mechanism, and the cartridge section 6 is provided.
In c, the wound paper is stored, and this paper is
The paper transport mechanism of the printer mechanism section 6b transports the print head to the print head.

FIG. 3 shows an exploded view of only the parts to be sealed.

The main cover 11 and the DIP switch cover 14 have screws 31a and 31b and screws 31 on the base 22 and the main cover 11, respectively.
It is fixed by c and is sealed by the screws 31a and 31c.

In the method of sealing with the screws 31a and 31c, as shown in FIG. 4, a through hole is formed laterally in the head of the screw 31, while the sealing member 32 is formed on the main cover 11. The wire 33 is passed through the through hole and the sealing member 32, the wire 33 is further passed through a disc-shaped lead disc 34, and the wire 33 is pulled through the lead disc 34 to pull the wire 33. The wire 33 is stretched between the screw 31 and the sealing member 32 so as not to loosen, and in this state, the lead disk 34 is crushed.
It is fixed so that it will not come loose and sealed. That is,
In order to remove the screw 31 in this state, the wire 33
Have to disconnect.

As other sealing methods, there are a method of sealing with a seal and a method of using a screw which cannot be taken out without using a special tool, and the present invention is limited in the method of sealing. Not a thing.

The fixing portion 12b of the load cell 12 is placed in the weighing portion accommodating portion 22b of the base 22 so that the connecting portion 12a of the load cell 12 fixed to the pan support 13 is located substantially in the center of the base. It is fixed to the provided load cell fixing portion 22d. The A / D converter 20
Is fixed beside the load cell 12, and the weighing I /
The O-board 21 is fixed by four resin studs 29a, 29b, 29c, 29d provided on a convex portion formed one step higher in the rear portion of the weighing unit storage portion 22b.

The air holes 11g formed on the upper surface of the protruding table 11e of the main cover 11 are slit-shaped through holes as shown in FIG. 5 (a). For example, as shown in FIG. 5 (b). It may be a round hole-shaped through hole, or as shown in FIG.
Even a net-shaped quadrangular through hole as shown in (c) is further formed in a blind shape as shown in FIG. 6 (a) and FIG. 6 (b) showing the AA cross section of FIG. 6 (a). The ones that have been given are also good. However, the size of each hole is such that it does not pose a safety problem, for example, it does not allow a finger to enter.

FIG. 7 shows a block diagram of a circuit configuration of a main part around the load cell 12, the A / D converter 20 and the weighing I / O board 21 of the electronic fee scale 1.

In this embodiment, the weighing I / O board 21 and the PC block 23 are connected by the RS-232C line, but the weighing I / O board 21
The PC block 23 and the PC block 23 may be connected to each other by another communication line, or, for example, a D / P / RAM (dual p)
ort random access memory).

As a central processing unit for weighing of the electronic fee scale 1, a scale side CPU (central proc) constituting a control unit main body
essing unit) 41, via a balance-side system bus 42, balance-side ROM (read only memory) 43, flash memory 44 as a non-volatile memory, balance-side RAM (rand)
om access memory) 45, scale side interface 46,
I / O for inputting signal from DIP switch 21a
(Input / output) port 47, a first serial interface 49 for controlling data transmission with the key display controller 48 for controlling the keyboard 8 and the fluorescent display 10, through the load cell 12 and the A / D converter 20 It is configured to be connected to a printer interface 52 that controls data transmission with the connected second serial interface 50, the thermal printer 51 including the main printer and the sub printer 9.

The balance-side ROM 43 includes the balance-side CPU
Program data such as an initial program loader performed by 41 is stored, and in the flash memory 44,
Stored are program data for processing relating to weight, unit price, price, etc. performed by the balance side CPU 41 and program data for test mode processing. RAM 45 on the balance side
Stores a PLU file in which product information is stored for each product, and forms various memory areas used when the balance-side CPU 41 performs processing.

The A / D converter 20 digitally converts the analog signal output from the load cell 12 and outputs the digital data obtained by the digital conversion to the second serial interface 50. .

The dip switch 21a is used for the flash memory 44 when, for example, the measuring law is revised.
When rewriting the program data stored in, the DIP switch cover 14 is unsealed and removed,
The flash memory 44 is made writable (rewritable) by turning it on.

FIG. 8 shows a block diagram of a circuit configuration of a main part around the PC block 23 of the electronic charge balance 1.

As a general-purpose central processing unit of the electronic charge balance 1, a PC side CPU 61 constituting a control unit main body, a PC side ROM 63, a PC side RAM 64 as an application memory, and a clock circuit 65 via a PC side system bus 62. , A buzzer 66, a LAN board 67 for controlling data transmission by connecting to a LAN (local area network) line,
The metering I / O board 21 via the RS-232C line
A communication interface 68 connected to the hard disk device 24, a hard disk interface 69 for controlling data transmission to and from the hard disk device 24, and a floppy disk device 2
5, a floppy disk interface 72 for controlling data transmission with the LCD controller 7, an LCD controller 71 for controlling the LCD display 7, and a keyboard interface 7 for controlling data transmission with the PC-side keyboard 72.
It is configured by connecting with 3. The PC-side ROM 63 has a BIOS (basic inpu) executed by the PC-side CPU 61.
The initial program loader for transferring the program data relating to (t output system) and the application program read from the hard disk device 24 or the floppy disk device 25 to the PC side RAM 64 as a system memory is stored.

Further, the PC side RAM 64 is processed by the initial program loader so that the PC side C
The program data of the processing that is not related to the weight, unit price, price, etc. performed by the PU 61 is stored, and the PC side C
Areas of various memories used when the PU 61 performs processing are formed.

The clock circuit 65 supplies time data to the CPU 61 on the PC side via the system bus 62 on the PC side.
The control signal from the CPU 61 on the C side issues an error warning or the like.

In this embodiment having such a configuration, the load cell 12, the A / D converter 20, and the weighing I / O board 21 are used as a main printer or the like which is composed of a PC block 23, a printer mechanism section 6b and a cartridge section 6c. It is separated from other parts by the base 22.

That is, the printer storage unit 22a, the weighing unit storage unit 22b, and the general-purpose storage unit 22c are respectively the base 2
It is formed so as to be divided into two parts, and the printer housing portion 22a includes a printer mechanism portion 6b and a cartridge portion 6c.
The main printer configured from is stored, and the load cell 12 and the A / D converter 20 are provided in the weighing unit storage unit 22b.
And a measurement I / O board 21 are stored, and a general-purpose storage unit 22
In c, a PC block 23, a hard disk device 24,
Other parts such as the floppy disk device 25 and the power supply unit 26 are stored.

A weighing section housing section 22 in which the load cell 12, the A / D converter 20, and the weighing I / O board 21 are housed.
Since b is closed by the main cover 11 and the DIP switch 14 and sealed after the verification, it is not possible to freely replace parts and change specifications.

However, in the printer storage section 22a and the general-purpose storage section 22c, since the right cover 19 and the left cover 18 are detachably provided without requiring sealing even after the verification, the cartridge can be easily replaced. Of course, it is easy to replace the PC block 23 and other parts or change the specifications.

On the upper surface of the main cover 11, the tray receiver 1
4 protruding bases 11b, 11c, 1 forming an X-shaped groove 3
Since it is loosely fitted in 1d and 11e, the tray tray 13 can be directly attached by hand.
You can't grab.

Further, since the air holes 11g are formed in the projecting base 11e, the heat accumulated inside the measuring unit accommodating portion 22b can be discharged to the outside to suppress the temperature rise inside the measuring unit accommodating portion 22b. it can. Further, since the upper surface of the protruding table 11e in which the air holes 11g are formed is covered and the edge (end portion) of the weighing pan 5 is positioned lower than the height of the upper surface,
External moisture falls down from the edge of the weighing pan 5 and the air holes 11
There is no possibility that moisture will enter the inside of the weighing unit storage unit 22b from g.

As described above, according to the present embodiment, the load cell 12, the A / D converter 20, and the weighing I / O board 21.
And a general-purpose storage section 22c for storing a main block, a printer storage section 22a for storing a main printer, a PC block 23, and other general-purpose storage sections 22c. The base 22, the main cover 11 and the DIP switch cover 14 for closing and sealing the weighing storage portion 22b, and the printer storage portion 22a are covered with the main cover 11.
The light cover 19 that closes together with the general-purpose storage unit 22c
The left cover 18 and the bottom cover 28 for closing the main cover 11 and the dip switch cover 1 are provided.
By sealing only 4 after verification, it is possible to reliably seal only the parts that are involved in the verification of the Measurement Act, etc., and the PC block 23 and other parts that are not involved in the verification of official standards such as the Measurement Act. Easy replacement and specification change.

Further, since the projecting stand 11e formed on the upper surface of the main cover 11 is provided with the air hole 11g, and the edge of the weighing pan 5 covering the main cover 11 is located at a position lower than the air hole 11g. It is possible to prevent the rise of the internal temperature by discharging the internal heat to the outside without the risk of the external moisture entering the inside of the device. Therefore, the load cell 12 can be used reliably and stably.

Further, the pan receiver 1 is provided on the upper surface of the main cover 11.
4 protruding bases 11b to 1 forming an X-shaped groove for housing 3
Since 1e is formed, it is possible to prevent the tray support 13 from being directly grasped by the hand and pulled. Therefore, it is possible to reliably prevent the load cell 12 from being broken by pulling the pan support 13.

In this embodiment, as shown in FIG. 1, an apparatus main body 2 provided with a weighing pan 5, a load cell, a circuit and the like,
An electronic charge balance 1 comprising an operator LCD display 7 and a keyboard 8 and an operation / display unit 4 provided with a customer fluorescent display 10, which is fixed upward by connection pipes 3a and 3b fixed to the apparatus main body 2. However, the present invention is not limited to the arrangement position of the display, the keyboard, etc. described above. For example, like the electronic charge balance 81 shown in FIG. 9, an operator LCD display, a keyboard, a weighing pan, and a load cell are provided. The present invention can also be applied to a device main body 82 provided with circuits and the like, and a display section 84 provided with a customer fluorescent display fixed to the main body 82 by a connecting pipe 83.

[0056]

As described above in detail, according to the present invention,
With parts, etc. involved in official standards such as the Measurement Law sealed,
It is possible to provide an electronic charge balance that allows easy replacement of parts and specification changes that are not involved in official standard certification.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded view of the same embodiment.

FIG. 3 is an assembly exploded view of only the sealed component of the embodiment.

FIG. 4 is a view showing an example of sealing with screws of the same embodiment.

FIG. 5 is a view showing examples of various shapes of air holes of the same embodiment.

FIG. 6 is a view showing a blind-shaped example of the air holes of the embodiment.

FIG. 7 is a block diagram showing a circuit configuration of main parts around a load cell, an A / D converter, and a weighing I / O board according to the embodiment.

FIG. 8 is a block diagram showing a circuit configuration of main parts around a PC block of the embodiment.

FIG. 9 is a perspective view showing another embodiment.

[Explanation of symbols]

11 ... Main cover, 12 ... Load cell, 14 ... DIP switch cover, 20 ... A / D converter, 21 ... Metering I / O block, 22 ... Base, 22a ... Printer storage section, 22b ... Measuring section storage section, 22c ... General purpose Department storage,
23 ... PC block, 28 ... bottom cover, 31a, 3
1b, 31c ... Screw, 32 ... Sealing member, 33 ... Wire, 34 ... Lead disc.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Shimomura 6-78 Minamimachi, Mishima City, Shizuoka Prefecture Tokyo Electric Co., Ltd. (72) Inventor Kazunori Nagasawa 6-78 Minamimachi, Mishima City, Shizuoka Prefecture Tokyo Electric Co., Ltd. Mishima factory

Claims (1)

[Claims] 1. A weight measuring element for measuring the weight of a product in an electronic charge balance for weighing the product, calculating the price of the product, and displaying the weight and the price. And a non-volatile memory that stores a program for processing related to price, a central processing unit for weighing that performs processing related to weight and price based on the program stored in the non-volatile memory, and related to weight and price An application memory that stores a program for processing that is not performed, a general-purpose central processing unit that performs processing based on the program stored in the application memory, and a balance that includes the weight weighing element, the non-volatile memory, and the central processing unit for weighing. A general-purpose unit for accommodating a general-purpose unit including the application memory and the general-purpose central processing unit. Section storage section, a partition member for partitioning the scale section storage section and the general-purpose section storage section, an exterior member for closing the general-purpose section storage section, and a sealing member for closing and removing the scale section storage section. An electronic charge balance, which is provided with a sealing exterior member.