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In an apparatus in which a platen on which printing paper is set via an ink ribbon is disposed in
the vicinity of a carrier unit which moves in a predetermined direction by means of a driving
mechanism. A printing apparatus for a serial printer, wherein a plurality of print heads are
mounted on the carrier portion.
Serial printer printing device
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
printing device of a serial printer, and more particularly to a printing device of a serial printer
capable of printing simultaneously by two printing units. Conventionally, in this rice printing
apparatus, two wire ropes are symmetrical by K11ll) and one end is hung on the frame through
the drive gouri of the crossfeed motor and the guide pulley of the other company's carrier
section. . One print head is mounted on the top of this carrier, and when moving and moving to
the right, the 7 solenoids are energized while being selected in a timely manner, and the dot
matrix character is printed by K. The moving speed of the carrier determined the printing speed.
Also, in order to increase the carrier speed, it is necessary to increase the response speed of the
print wire itself in the print head, which is very difficult to be nearly doubled. In order to increase
the response speed of such a printed wire itself to, for example, one lint wire operation of each
solenoid incorporated in the print head, the number of ampere turns of the solenoid coil may be
increased, or the applied voltage (current) may be increased. Although various methods such as
shortening the printing stroke or the like can be considered, some improvement can be seen near
the limit of the response speed. That is, when the applied voltage (current) was increased, the
heat generated in the solenoid increased the chest temperature and adversely affected the
electronic circuit components. In addition, when the printing stock is shortened, when the
number of copies per page EndPage: 1 increases, there is a drawback that the ink stains on the
printing paper. SUMMARY OF THE INVENTION It is an object of the present invention to provide
a KL serial printer for improving reliability and print processing capacity by mounting two print
heads in a carrier portion in order to eliminate the above-mentioned conventional defects. And
there. According to the present invention, in an apparatus in which a platen on which printing
paper is set via an ink ribbon is disposed in the vicinity of a carrier unit which moves in a
predetermined direction by a drive mechanism, the print heads of several carrier units KIN are
mounted. It is an object of the present invention to provide a printing apparatus for a serial
printer characterized by the above. An embodiment of the present invention will be described
with reference to the drawings. FIG. 21 shows a schematic structural explanatory view, and in
FIG. 21, a guide 1-2 is rotatably attached to the carrier unit 1 and two print heads 8 are mounted
symmetrically in the front-rear direction. A wire loop 4 is hooked on the guide pulley 2, and one
end of the wire rope 4 is fixed to a wire hook 6 fixed to the site frame 6, and the other end is
transversely fed via the guide pulley 2. It fixes to the drive pulley 8 connected with the motor 9,
and the two wire ropes 4 are hung on the guide 1-2 in left-right symmetry.
In the vicinity of the print head 8, 1 Latin 10 in which the printing paper 11 is set via the ink
ribbon 12 is disposed. FIG. 2 shows a detailed side view of the print head 8. The print head 8 is
fixed to a ruby guide 86 in which one lint wire 8b incorporated in the print solenoid 8aK is
arranged in a single longitudinal direction with a wire guide 8c4C. . In the printing apparatus of
the serial printer with the above configuration, when a rotation command is given to the
crossfeed motor 9 from the control circuit unit (not shown), it rotates in the counterclockwise
direction (arrow in the figure), and the wire o-74 on the right side Is wound and dissipated by the
drive 1-8, so that the carrier portion 1 also moves to the right. At this time, the left side wire roll
14 is also unwound from the drive pulley 8 to the same length as the wire roll 14 on the right
side. This movement direction is the printing operation of the carrier unit 1. On the other hand,
when the transversely-fed motor 9 reverses in the clockwise direction, the carrier portion 1
moves in the left direction according to the principle described in the counterclockwise direction.
As described above, when the carrier unit 1 is moved in the left-right direction by the rotation
command from the control circuit unit, the print solenoid 8a of one head 8 is excited by the print
command pulse sent from the character generating unit (not shown). And, the printing wire ?
80 is set in the tip direction via the working j1 wire guide 8C ruby guide 8d and moves by the
printing stroke of the friend. The print wire 3b moved in this manner is set on the surface of the
platen 10 through the ink ribbon 12 and collides with the printing paper llK to hit one dot. When
this hit point is finished, the print wire 3b returns to its original position by the elastic force of a
return spring (not shown) provided inside the 1-lint solenoid 8a. When moving in the right
direction by the above-described operation, the carrier portion 1 mounted with such two 1-line
heads 8 conducts electricity while appropriately selecting each print solenoid 8a, and dot matrix
characters are printed on the printing paper 11 It can be printed. Although the dot matrix gelint
mechanism has been described in the above embodiment, the present invention can be easily
applied to a print type glint mechanism. Therefore, when the carrier unit 1 carrying the two
print-heads 8 in the direction of symmetry is moved to the right direction by the printing
apparatus of the serial printer according to the present invention. Since the printing sheets INK
of 2fag 14 can be simultaneously printed by driving the respective solenoids 3a by the printing
command pulse sent out from the generating unit, the printing speed is apparently doubled, and
the different EndPage: 2 sheets It is possible to miniaturize the width to a fishing machine as
compared to conventional devices of the type in which the are arranged in parallel.
In the present invention, as described above, when the printing speed is doubled and the size of
the horizontal width is reduced to about a ring when using 21111 printing paper, the applied
voltage of the solenoid and the stroke can be made loose. As a result, the heat generation of the
solenoid and the contamination of the ink can be prevented and the reliability can be improved.
If the same character code is sent to two print heads, printing can be performed up to twice as
many copies and one sheet, so that the print processing performance can be improved.
Brief Description of the Drawings FIG. 1 shows an embodiment of a printing apparatus for serial
1 linters according to the present invention, FIG. 1 is an explanatory view of a schematic
configuration, and FIG. 2 is a detailed explanatory view of essential parts. Reference Signs List 1
carrier portion 2 guide pulley 8 print head 8 a print solenoid 8 b single lint wire 8 C wire guide 8
d ruby guide 4 ииии Wire row 1.8 и и и Drive pulley, 9 и и и Motor, 1 G и и и 1 Latin, 11 и и и Printing
paper, 12 и и и и и и и и ? A large patent attorney Akira Uchihara EndPage: ?
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description, jps53113628
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