JPS6133713B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device that performs color-coded printing.

In conventional printing apparatuses, in order to facilitate visual identification of printed information printed on recording paper, one has been put into practical use that prints in different colors depending on the type of output information. For example, as shown in Figure 1a, there is a printing device in which the color coding target of print data is set specifically for positive numbers and negative numbers, or as shown in Figure 1b, the color coding target is set specifically for set numbers and result numbers. It's like a printing device. That is, in the printing apparatuses a and b, print data is printed in two colors according to one predetermined color-coding mode, thereby making it easy to distinguish between print record information.

However, in the color-coded printed record information as described above, if positive and negative numbers are printed in color as shown in Figure 1a, the positive and negative numbers are clear, which is convenient for monetary calculations, etc. It is difficult to distinguish between the calculation process and the calculation result, and it takes time to extract only the results from a large amount of printed record information. Furthermore, if the number of placements and the number of results are printed in different colors as shown in FIG. In other words, in all printing devices, the color coding type is fixed to one of the two, such as positive numbers and negative numbers, or set numbers and result numbers, so it is easy to visually identify the printed record information for specific applications. However, it is not effective for other uses and has the drawback of lacking versatility.

This invention has been developed in view of the above-mentioned circumstances of the present invention. For example, the color coding of positive numbers and negative numbers is such that the correspondence between the type of print data and the print color can be arbitrarily selected, such as color coding of set numbers and result numbers. The present invention provides a printing device with the following features.

An embodiment of the present invention will be described in detail below with reference to the drawings. 1 in FIG. 2 is an arithmetic register that normally stores arithmetic data, and data from an arithmetic circuit (not shown) is stored in this arithmetic register 1 when an AND circuit 2 is output when a 1-word time data input command is output from a control section (not shown). and an OR circuit 3, and the input data is cyclically stored through an AND circuit 5 and an OR circuit 3 to which a signal obtained by inverting the data input command by an inverter 4 is supplied. The data stored in the arithmetic register 1 is transferred to the print buffer register 8 via an AND circuit 6 and an OR circuit 7 when a print command is issued from the control section, and is converted into a signal obtained by inverting the print command signal by an inverter 9. The signal is stored cyclically through the AND circuit 10 and the OR circuit 7 to which the signal is applied. _In this case, the print buffer register 8 consists of 13 digits as shown in _FIG .
indicates the timing at which each digit is output. T ₁
The digit output at the timing of (hereinafter abbreviated as T ₁ digit) stores a sign code indicating the positive or negative of the data stored in this print buffer register 8, and here "15" is a negative number code. . T ₂ digits store the symbol code that specifies the line of the 13th column of the type wheel, which will be described later.
A numerical value, a data code representing a decimal point, and a minus sign are stored in digits T ₃ to T ₁₃ , respectively. The data stored in the print buffer register 8 is sent to one input terminal of a serial-parallel conversion circuit 11 and a coincidence detection circuit 12. Reference numeral 13 denotes a printing section, which includes a printing mechanism section of a multi-type wheel printer, a driving device, an ink ribbon switching device, and a synchronization signal generating device, and receives a motor drive signal from a control section.
This printing unit 13, which is rotationally driven by the MD, outputs a synchronizing pulse Tp indicating the row of the type wheel, and a synchronous pulse Tp indicating the row of the type wheel.
Reset pulse synchronized with rotation or stop position
Re is output, and the synchronization pulse Tp is supplied to the counter 14. This counter 14 consists of 4 bits and counts up the synchronization pulse Tp and sends the count value to the coincidence detection circuit 12.
It is reset by the reset pulse Re from the printing section 13. The coincidence detection circuit 12 compares the output information from the print buffer register 8 with the count value of the counter 14, and sends the resulting coincidence signal to the print register 15. This print register 15 has a capacity of 12 digits (T ₂ to _{T 13} ), each digit being 1 bit, and the output of each digit is supplied to the drive device of the type wheel corresponding to each of the printing units 13. There is. The character arrangement development diagram of each type wheel is as shown in FIG. 4, and the correspondence between each column and the print register 15 is as follows: 1st column → T ₁₃ , 2nd column → T ₁₂ , 3rd column → T ₁₁ , 4th column → T ₁₀ , 5th column → T ₉ , 6th column → T ₈ , 7th column → T ₇ , 8th column → T ₆ , 9th column → T ₅ , 10th column → T ₄ , 11th column → T ₃ , 12th column (empty column), 13th column → T ₂ . Then, each column rotates in conjunction with each other, and for each column number, the type wheel of the column corresponding to the digit where "1" is set in the print register 15 is locked. on the other hand,
The serial-to-parallel conversion circuit 11 to which the output information of the print buffer register 8 is supplied converts the serial 4-bit output information from the print buffer register 8 into parallel 4-bit information, and its content is "15". If so, a “1” signal is sent to the first input terminal of the AND circuit 16, and if it is “4”, the AND circuit 1 is sent.
A "1" signal is sent to the first input terminal of 7. A signal S from the print mode selection switch 18 is applied to the second input terminal of the AND circuit 16, and a timing signal _T2 from the control section is applied to the third input terminal. is controlled to open the gate in synchronization with the timing signal _T2 . Further, a signal obtained by inverting the S signal by an inverter 19 is applied to the second input terminal of the AND circuit 17, and a timing signal _T3 is applied to the third input terminal. Here, print mode selection switch 18
When set to the "1" side, the color-coded print mode for positive numbers and negative numbers is selected, and when set to the "0" side, the color-coded print mode for the set numbers and result numbers is selected. Said AND circuit 1
The outputs of 6 and 17 are applied to the set terminal of flip-flop 21 via OR circuit 20. The reset pulse Re from the printing section 13 is applied to the reset terminal of the flip-flop 21, and the Q
The side set output is supplied as an ink ribbon switching signal to the printing section 13 via an AND circuit 22, one input end of which is supplied with a print timing signal PT.

Next, the operation of the circuit configured as described above will be explained. During normal calculation, all printing circuits are stopped, and printing operation is started by a printing command from the control section. The contents of the arithmetic register 1 are circulated through an AND circuit 5 and an OR circuit 3. When a print command is applied, the AND circuit 5 closes and the AND circuit 6 opens, thereby changing the contents of the arithmetic register 1. Transferred to print buffer register 8,
Thereafter, it circulates through an AND circuit 10 and an OR circuit 7.

Here, referring to Figure 5 a and b, let's take the calculation 123.45 + 67.8 = 191.25 246. × -45. = -11070. As an example, we will first perform a printing operation in which positive numbers are colored black and negative numbers are colored red. I will explain about it. Figure 5a shows print buffer register 8, counter 14, and print register 1 when "123.45+" is printed.
5 is a state diagram showing the contents of the type wheel. The print mode selection switch 18 is set to the "1" side. When a printing command is issued, a motor drive signal MD is applied to the printing unit 13, the type wheel starts rotating, and a synchronization pulse Tp is generated, but before the first synchronization pulse Tp ₁ is generated, the contents of the counter 14 are is "0", and this "0" and the content of each digit of the print buffer register 8 match the detection circuit 12.
The comparison is performed sequentially starting from _{the 1st} digit of T, and the detection outputs are sequentially sent to the print register 15. However, since the _T1 digit is a sign digit, even if they match, the detection output will not be generated at the timing of _T1 . In this example, the content of the T ₂ digit of the print buffer register 8 is "0" and is equal to the content of the counter 14, so the fifth
As shown in Figure a, "1" is stored in the _T2 digit of the print register ₁₅ at the timing T2. The contents of each digit of this print register 15 are sent in parallel to each drive unit of the type wheel, and the contents of the _13th column of the 0th line in FIG. +” lock symbol. Subsequently, when the first synchronizing pulse _Tp1 is generated, the counter 14 counts 1, and the same operation as described above is performed to lock the 8th column of the 1st line of the type wheel. Similarly, the synchronization pulses Tp ₂ ~
Each time Tp ₁₂ occurs, the counter 14 counts up, and at Tp ₁₂ , the type wheel is set as shown in FIG. 5a. Incidentally, the contents of the print buffer register 8 are sent to the coincidence detection circuit 12 as described above, and also to the serial-parallel conversion circuit 11. In this serial-parallel conversion circuit 11, as mentioned earlier, when the input signal is "15", the AND circuit 1
In this case, the S signal is "1" and the gate of the AND circuit 16 is opened at timing _T2 . Now, at the timing of _T2 , the contents of the _T1 digit of the print buffer register 8 are converted into parallel, but since the _T1 digit is "0", the serial-parallel conversion circuit 11 outputs "1". ``No signal is output and flip-flop 21 is not set.
Therefore, the AND circuit 22 remains closed and no ink ribbon switching signal is output. That is, when the signal S from the print mode selection switch 18 is "1" and the _T1 digit of the print buffer register 8 is "15", the ink ribbon switching signal is supplied to the printing section 13 to change the color of the ink ribbon. exchange black for red,
If _{the first} digit of T is not "15", the ink ribbon will print black. When the reset pulse Re is applied to the counter 14 after printing is completed, the counter 14 is reset and the type wheel is also returned to its initial state, completing one cycle of printing. Subsequently, when the next set number "67.8+" and its calculation result "191.25" are sent to the print buffer register 8, the state of the print buffer register 8 and the type wheel is changed to the state shown in FIG. 5b by the same operation. As shown in , both
T Since _{the first} digit is "0", it is printed in black.

Next, printing of negative numbers will be explained with reference to .about. in FIG. 5b. “246.×” as shown in Figure 5b
When is set, it is the same as above, but next, as shown in the same figure, when "-45" is entered, since this is a negative number, the _T1 digit of the print buffer register 8 becomes "15". Therefore, a "1" signal is applied from the serial-parallel conversion circuit 11 to the AND circuit 16 at the timing _T2 , and the flip-flop 21 is set via the AND circuit 16 and the OR circuit 21. When the printing timing signal PT is applied to the AND circuit 22, it is supplied to the printing unit 13 via the AND circuit 22 as an ink ribbon switching signal. When the printing unit 13 receives the ink ribbon switching signal, the ink ribbon is switched from black to red, and "-45.=" is printed in red. The same applies to the calculation result in FIG. 5b, and is printed as shown in FIG. 1a, for example.

Next, the printing operation of color-coding the entered number into black and the result number into red will be explained using the same example as the previous example using FIGS. 5a and 5b. In this case, the print mode selection switch 18 is switched to the "0" side (ground side). As a result, when the print data is a set number, the black ink ribbon is selected, and when the print data is a result number, an ink ribbon switching signal is output and the ink ribbon is set to be switched to the red ink ribbon. Also, since the S signal becomes "0", the AND circuit 16 is closed and the AND circuit 17 is opened. Therefore, when the serial-parallel conversion circuit 11 outputs a "1" signal at the timing _T3 , that is, the print buffer register ₈ outputs the T2 signal.
When the content of the digit is "4", the AND circuit 17 opens and generates an ink ribbon switching signal. First, when "123.45+" is entered as shown in FIG. 5A, the _T2 digit of the print buffer register 8 is "0", so as explained above, no ink ribbon switching signal is generated. The same holds true when "67.8+" is entered as shown in FIG. 5b. next T
When the key is operated, the calculation result is entered into the print buffer register 8 as shown in the figure, and the _T2 digit becomes "4", so the AND circuit 17 opens and its output signal goes through the OR circuit 20 to set the flip-flop 21. However, the Q side set output is applied to one input terminal of the AND circuit 22. When the printing timing signal PT comes here, an ink ribbon switching signal is output from the AND circuit 22 to the printing section 13,
The ink ribbon is switched to black and the above "191.25T" is printed in black. Furthermore, the same applies to the figures 1 to 3, and for example, printing is performed as shown in FIG. 1b.

Although this embodiment has been described using a multi-type wheel type printing mechanism as an example, other printing mechanisms may be used as long as they are capable of color-coded printing. In addition, the color-coding type of print data is set as positive number - black, negative number is red, numeric value - black, and result number - red, but it is possible to use only these color combinations, for example, use four different colors. It is possible. Various types of color coding other than those mentioned above can be considered, such as odd numbers and even numbers, grand total and normal output, etc. Three or more types of printing in two colors may be provided so that they can be switched. Correspondence between the type of print data for color-coded printing and the print color (for example, positive number -
The printing means, control means, etc. can be selected in accordance with an external operation (black, negative number - red correspondence, or position number - black, result number - red) according to an external operation. Configurable.

As described above, according to the present invention, the color-coding type can be selected depending on the purpose of use, and one printing device can be used for various purposes to obtain printed record information that can be easily separated, resulting in improved calculation efficiency, administrative efficiency, etc. In addition, it is not necessary to provide a plurality of printing devices for each purpose of use, and the economic burden can be reduced.

[Brief explanation of the drawing]

Figures 1a and b are diagrams showing an output example of color-coded printing, Figure 2 is a block diagram showing the circuit configuration of an embodiment of the present invention, and Figure 3 is a diagram of the print buffer register used in this embodiment. The configuration diagram, Figure 4 is a developed diagram of the character arrangement of the type wheel also used in this example,
FIG. 5 is a state diagram showing changes in the contents of the counter, print register, and type wheel with respect to the contents of the print buffer register, in order to explain the operation of this embodiment. 8... Print buffer register, 11... Serial-parallel conversion circuit, 12... Coincidence detection circuit, 13
...Printing section, 14...Counter, 18...Print mode changeover switch, 21...Flip-flop.

Claims (1)

[Scope of Claims] 1. A storage means for storing print data and a type code representing the type of the print data; and a printing means capable of selectively printing the print data in the storage means in at least two print colors. , a determining means for determining the type code of the storage means when printing the print data of the storage means; and a plurality of predetermined correspondences for associating the plurality of types of the print data with the plurality of print colors. a selection means for selecting a color-coded printing mode in response to an external operation; and a determination result obtained by the discrimination means when printing the print data in the storage means is predetermined as the color-coded print mode selected by the selection means. and a control means for outputting a print color switching signal to the printing means when the color-coding type conforms to the specified color-coding type, and the control means is provided with a control means for outputting a print color switching signal to the printing means when the color-coding type conforms to the color-coding type. A printing device characterized by being able to be selected according to an operation.