JPS5852504B2 - Intermediate dot printing method in dot line printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention prints one dot line by reciprocating a shuttle bar in which a plurality of dot wires are arranged in the printing line direction, and each time the printing of one dot line is completed, The present invention relates to an intermediate dot printing method for increasing dot printing density in a dot line printer that feeds a medium to obtain one line of dot characters.

Conventional dot line printers can print faster than printers that print using type, but the quality is extremely poor because the density of printed dots (hereinafter simply referred to as dot density) is low.

Therefore, it could not be used in cases where high printing quality was required for the characters to be printed.

In order to eliminate the above drawbacks, the present invention prints one dot line by moving the shuttle bar r times in the right direction (hereinafter simply referred to as forward movement) and S times in the left direction (hereinafter simply referred to as backward movement). (where r = s or r = s ± 1), each time the shuttle bar reverses its direction of motion, the dot printing position is set to C/(r + s) (where C prints dots in a matrix of m rows and n columns). Shift the dot row spacing) by R/(r +
s) (where R is the dot row interval when printing dots in a matrix of m rows and n columns).
An intermediate dot is printed between each dot of a dot character composed of a matrix of rows and n columns, and will be explained in detail below with reference to the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

In FIG. 1, 1 is a head bracket, 2 is four wire drive mechanisms fixed to this head bracket 1, and 3 is a head bracket.
4 is one dot wire driven by this wire drive mechanism 2, and 4 is slidably supported by four guide holes 4a to move the e number of dot wires 3 in the print line direction. Shuttle bars 5, which are arranged at p-character intervals and reciprocate in the print line direction by a drive source (not shown), are pressure-sensitive paper that is fed in a direction perpendicular to the print line direction by a feed mechanism (not shown).

In the above configuration, the operation will be explained using explanatory diagrams shown in FIGS. 2 and 3.

First, when the shuttleper 4 is reciprocated by p characters in the printing line direction by a drive source (not shown), the dot wire 3 supported by the guide hole 4a is also reciprocated by p characters in the printing line direction.

At this time, each time the shuttleper 4 moves a predetermined distance C, the four wire drive mechanisms 2 are selectively driven to drive the corresponding dot wires 3, so that dots are printed on the pressure sensitive paper 5.

In this way, for example, to print the dot character "B" in 7 rows and 5 columns with normal quality, first move the shuttleper 4 forward and use an arbitrary dot wire 3 to print the dot character "B" in the R1 row as shown in FIG. Dots are printed in columns C1, C2 and C3 and C4, and then the pressure sensitive paper 5 is fed a predetermined distance R, after which the shuttleper 4 is moved backward to print dots in columns C6 and 01 of row R2.

Similarly, columns C1, C, of row R3 shown in FIG. 2, columns C4, C3, C2, C1 of row R4, columns C1, C6 of row R3,
C6, 01 column of R6 row, C1, C2, C3, C of R7 row
When dots are printed in 4 columns, a matrix of 7 rows and 5 columns is formed in which the dot column spacing is C1 and the dot row spacing is R.

At this time, the other dot wires 3 also print dots in desired columns of rows R1 to R7, so that 7 rows and 5 columns of dot characters can be printed at high speed, with px6 characters per character row.

For example, to print a high quality dot character “B”,
First, move the shuttleper 4 forward and use any dot wire 3 to connect C1°C2, C3, C in the R1 row shown in FIG.
Dot printing in 4 rows, then press C1 while the pressure sensitive paper 5 is stopped.
, C6 . The shuttleper 4 is moved back to columns C7, C8, and C9 to print dots in columns C8, C7, and 06 of row R0.

Next, on the pressure-sensitive paper 5, line R' which is half the one-dot line interval R mentioned above.
1゜R'2 s R'3 s R'4 , R'5 t
As R'6, only R/1, that is, R/2 is fed.

Next, the shuttleper 4 is moved forward again to print a dot in the 01 column of the R1/row, and then, while the pressure-sensitive paper 5 is stopped, the shuttleper 4 is moved backward to print a dot in the C0 column of the R1 row. do.

Similarly, when dots are selectively printed in appropriate columns of rows R2 to R7 and rows R2' to Hiki' as shown in FIG. High quality dot character “B” with intermediate dots printed between the dots
is printed.

At this time, other dot wires 3 are also connected to rows R1 to R7 and R1.
Since we are printing dots in the desired columns of rows ' to R6', we will print p x 1 on the 13 rows and 9 columns of dot characters obtained by printing intermediate dots between each dot of the 7 rows and 5 columns of dot characters. Characters can be printed.

Note that since the quality of printed characters can be changed without changing the reciprocating speed of the shuttleper 4, the quality of printing can be easily increased.

Further, if necessary, the dot density of only some characters can be increased to improve printing quality.

FIG. 4 is a block diagram showing the control circuit of the embodiment shown in FIG. 1, in which 6 is a changeover switch for switching the dot density between low density and high density, and 7 is a switch for switching the dot density between low density and high density. 8 is the memory for storing print data, and 8 is the shuttleper 4.
A timing sensor 9 sends out a printing timing signal every time the dot row interval C moves. When the selector switch 6 is switched to the low density side, the timing sensor 9 sends out a printing timing signal from the memory according to the printing timing signal sent from the timing sensor 8. The print data is read out and distributed to the print magnet driver 0, and every time the shuttleper 4 moves by p characters, the line feed motor driver 1 is driven for t hours, and when the changeover switch 6 is switched to the high density side, the timing sensor The print timing signal sent from 8 is delayed by i cycles, and the high-density print data is read out from the memory and distributed to the print magnet driver 0. Every time the shuttleper 4 moves back and forth by p characters, the line feed motor driver 1 is sent. 12 is a print magnet of the wire drive mechanism 2, and 13 is a line feed motor driven by the line feed motor driver 1 to feed the pressure sensitive paper 5 by a desired amount.

In the control circuit configured as described above, when the selector switch 6 is switched to low density, the print controller 9 reads the low density print data from the memory according to the print timing signal sent from the timing sensor 8, and distributes it to the print magnet driver 0. Every time the shuttleper 4 moves by p characters, the line feed motor driver 1 is driven for t hours.

Therefore, every time the shuttle bar 4 moves by a dot row interval C, the printing magnet 12 of the selected wire drive mechanism 2 acts to drive the dot wire 3, and every time the shuttle bar 4 moves forward or backward once. Then, the line feed motor 3 is driven for a time t to feed the pressure sensitive paper 5 by one dot line interval R.

When the selector switch 6 is switched to high density, the controller 9 delays the print timing signal sent from the timing sensor 8 by 7 cycles, reads high density print data from the memory 7, and combines it into the print magnet driver 0. , the line feed motor driver 1 is driven for 7 hours every time the shuttleper 4 moves back and forth by p letter valves.

Therefore, for example, when the shuttleper 4 moves forward, each time the shuttleper 4 moves by a dot row interval C, the printing magnet 12 of the selected wire drive mechanism 2 is immediately moved.
acts to drive the dot wire 3, and when the shuttleper 4 moves back, the selected wire drive mechanism 2 is delayed by i period every time the shuttleper 4 moves by the dot row interval C.
The printing magnet 12 works to drive the dot wire 3.

Further, each time the shuttleper 4 makes one reciprocating motion, the line feed motor 13 is operated for 100 hours to feed the pressure sensitive paper 5 by half of one dot line interval R, that is, by 7 dots.

In this way, the position where the shuttleper 4 moves forward to print dots and the position where it moves back to print dots can be easily changed.

Furthermore, FIGS. 5 to 8 are explanatory diagrams showing dot characters and print data according to the present invention, and in FIGS.
, '1' respectively "does not operate" the wire drive mechanism.
The normal quality dot character //B" shown in Figure 5 can be printed with the low density printing data shown in Figure 6, and the high quality dot character "/B" shown in Figure 7 can be printed with the low density printing data shown in Figure 7. B" indicates that printing can be performed using the high-density printing data shown in FIG.

As is clear from comparing Figures 6 and 8, the normal quality dot character "B" is also the high quality dot character "B".
The print data in columns C1 to C6 is the same. Therefore, if columns C1 to C6 are shared, the memory capacity can be reduced.

Incidentally, the present invention is not limited to the above-mentioned embodiment, but in general, the shuttleper 4 is moved back and forth r times by P letter valves, and performs an S recovery movement to finish printing one dot line.
The printing is shifted by C/(r + s) every time p characters are moved, and the medium is shifted by R/(r+s) every time one dot line is printed.
), intermediate dots can be printed between each dot of m60 rows of dot characters.

The number of intermediate dots that can be printed at this time is (r+s-1)
(m(n-1)+ (m-1) ((n-1) (r
+s-1)+n)) Therefore, printing quality can be extremely high by increasing the number of r forward movements and S backward movements of the shuttleper 4 required to finish printing one dot line. .

In this case, it goes without saying that the changeover switch 6 becomes unnecessary.

As described above in detail, according to the embodiment of the present invention, the shuttleper is made to move once by r times of forward movement and S times of return movement.
A line of dots is printed. At this time, the printing position is shifted by C/(r + s) each time the shuttle bar moves the letter p, and the medium is moved by R/(r + s) each time a line of dots is printed.
), intermediate dots are printed between each dot of m60 rows of dot characters, which has the effect of easily increasing print quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment according to the present invention, FIGS. 2 and 3 are explanatory diagrams explaining the operation of the embodiment shown in FIG. 1, and FIG. 4 is a schematic diagram showing the embodiment shown in FIG. A block diagram showing the control circuit, and FIGS. 5 to 8 are explanatory diagrams showing dot characters and print data according to the present invention. 1...Head bracket, 2...Wire drive mechanism, 3...Dot wire, 4...
... Shuttleper, 5 ... Pressure-sensitive paper, 6 ...
...Choice switch, 7...Memory, 8...
...Timing sensor, 9...Print controller, 10...Magnet driver, 11...
... Motor driver, 12 ... Printing magnet, 13 ... Line feed motor.

Claims (1)

[Claims] 1. A shuttle bar supporting e number of dot wires at intervals of p characters in the direction of the print line is reciprocated by p characters in the direction of the print line, and each time the shuttle bar moves a predetermined distance C, the e number of dot wires are selected. It prints a maximum of n X p X l (n is an integer) dots in one line, and then moves the print medium in a direction perpendicular to the printing line each time the printing of one dot line is completed. Feed m rows by a predetermined distance R, dot row distance C1, m row n with dot row distance R
A printing method for printing dots between the m rows and n columns of dots in a dot line printer that prints dot characters composed of a matrix of columns, px1 character per character line, wherein one dot line is printed on the shuttle bar. When printing by r forward movements and S backward movements (r=s or r=s±1), each time the shuttle bar reverses its movement direction, the dot printing position is changed to C/(r + s)
printing an intermediate dot between each dot of the m rows and n columns of dot characters by shifting the dots in the direction of the printing line and feeding the print medium by R/(r+s) every time one dot line is printed; An intermediate dot printing method in a dot line printer characterized by: