JPH0611565B2 - Printer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a carriage that reciprocates along a platen,
The present invention relates to a printing device such as a printer or a typewriter that prints on a sheet on a platen with a printing mechanism on the carriage.

2. Description of the Related Art Conventionally, in a printing device such as a pen plotter for printing using a pen, ordinary characters and symbols cannot be printed so beautifully. However, diagrams and graphs can be drawn neatly, and multicolor printing is easy. On the other hand, in a printing apparatus that prints by a printing means other than a pen, such as impact dot thermal, etc., ordinary characters and symbols can be printed relatively beautifully. However, there were difficulties in drawing diagrams and graphs. In other words, in this type of printing device, dots and short lines are continuously printed and then connected to draw a diagram or graph, so the connecting parts are misaligned and unsightly, and there are many figures that are difficult to print. It was Furthermore, it was difficult to perform multicolor printing.

Therefore, some conventional printers include a pen printing mechanism and another printing mechanism, and perform printing by selectively using these printing mechanisms.

However, in such a printing apparatus, those printing mechanisms have to be provided at separate positions on the carriage,
It is difficult to match printing by both printing mechanisms, and there is a problem that printing misalignment occurs between both printing mechanisms.

Therefore, an object of the present invention is to eliminate the print misalignment that occurs between the two printing mechanisms in a printing apparatus that includes a pen printing mechanism and another printing mechanism in combination.

Structure Hereinafter, the present invention will be described in detail with reference to the embodiments of the present invention shown in the drawings.

FIG. 1 shows a printer according to the present invention. Code (1
Reference numeral 0) is a platen that is bridged over the left and right side plates (12) and (14). The platen (10) has a sheet to be fed to the printing device.
(16) is wound from below and is pressed by the paper pressing roller (18) and the like. The rotation of the platen feed pulse motor (22) is transmitted to the platen via the gear train (20).
Therefore, the platen (10) is
It is rotated in both directions by sending a forward / reverse pulse to 2), and the paper (16) can be sequentially sent in the direction of the arrow in the figure while printing by the printing mechanism described later.

A carriage (24) is located in front of the platen (10).
A belt (26) is fixed to the carriage. The belt is
Two pulleys (28) located on each side of the printer
It can be hung between (30). The rotation of the carriage feed pulse motor (34) is transmitted to the one pulley (30) via the gear train (32). Therefore, the carriage (24) is moved left and right by sending forward and reverse pulses to the carriage feed pulse motor (34), and the guide shaft that is arranged parallel to the platen (10).
Guided by (36), it will reciprocate along the platen.

An impact type printing mechanism (38) is provided at the center of such a carriage (24). The impact type printing mechanism is a printing mechanism which is already widely used in printing devices, and is as shown in FIG. That is, the type wheel (40) is attached to the carriage (24), and the type wheel is rotated by the selection motor (42) to select a desired type character from the outer peripheral type (44). The selected type is printed hammer (4
It is struck on the platen (10) via the ribbon (48) with 6),
Printed on paper (16) on platen. Reference numeral (50) in FIG.
Is a paper retainer, which will be described in detail later.

Platen (10), as can be seen in the schematic diagram of FIG.
To the left of the carriage (24) toward the
2) is provided. The pen printing mechanism is also a printing mechanism already used in the printing apparatus, as shown in FIGS. 3 and 4. That is, the support block (54) fixed to the carriage (24) has two rising pieces (56) and (58), through holes are formed in these rising pieces, and a pen (60) is inserted through these through holes. ) Is supported on the support block (54) toward the center of the platen (10). The rear end of the pen is covered with a cap (62). The cap is placed in front of the rising piece (56) farther from the platen (10),
It is attached to the support block (54) by a mounting screw (64). The compression spring (66) is stored in this cap (62),
The compression spring biases the pen (60) toward the platen (10). The biased pen is received by the lever (68).
The lever is rotatably supported by a support shaft (70) passing through the support block (54) around the support shaft (70), and a notch is formed at the tip. The small diameter part of the pen (60) enters the notch, and the shoulder of the pen is the lever (68).
Hit the top edge of. The lower end of the lever is connected to the operating rod (74) of the solenoid (72). The solenoid is mounted below the support block (54) using a flange (76). And
The solenoid (72) is energized, the operating rod (74) is pulled in the direction of the arrow in the figure, and the lever (68) is rotated clockwise about the support shaft (70). Then, the pen tip is pressed against the platen (10) by the compression spring (66), and the paper (16) on the platen is
You will be able to print on. Reference numeral (50) in FIGS. 3 and 4 is a paper retainer indicated by the same reference numeral in FIGS. 1 and 2.

As shown in FIGS. 1 to 4, the paper retainer (50) is curved upward toward the platen side, and both left and right ends (p) and (q) along the longitudinal direction of the platen (10) are opposite to the platen. Can be folded in any direction. Further, as shown in FIG. 5, two mounting ends (78) and (80) project downward from below the paper retainer, and these mounting ends are screwed or pressed by a spring or the like to press the paper retainer. (50) is attached to the carriage (24) and is replaceable. At this time, the paper retainer faces the platen (10) with a slight gap, as shown in FIGS. 1 to 4. Then, the paper (16) fed into the printer is guided to prevent the paper from catching the ribbon (48) and the like, and prevents the paper wound around the platen (10) from floating. As shown in FIG. 5, such a paper retainer (50) has a circular print window (82) or a print at a position corresponding to the impact type print mechanism (38) and the pen print mechanism (52) described above, respectively. Hole
(84) is opened. The printing position (a) of the impact type printing mechanism (38) is located exactly in the center of the printing window (82), and the printing position (b) of the pen printing mechanism (52) is located exactly in the center of the printing hole (84). is there. The print position (a) is near the center of the paper presser (50), and the print position (b) is a distance (l) to the left along the length direction of the platen (10), in the rotation direction of the platen (10). Below
(m) Located at a distance. The distance (l) at this time is an integral multiple of the feed amount per pulse of the carriage (24) by the carriage feed pulse motor (34), and the distance (m) is 1 of the platen (10) by the platen feed motor (22). It is an integral multiple of the feed amount per pulse. In addition, the paper presser (50)
To indicate the horizontal and vertical positions of (a) and (b), print marks (86), (88), and
(90) and (92) are attached.

Therefore, according to the illustrated embodiment, by moving the carriage (24) and rotating the platen (10), the impact type printing mechanism (38) causes the paper (16) on the platen (16) to move as shown in FIG. ) Can be sequentially printed with "ABC", and when printing with the pen printing mechanism (52), the carriage (24) is automatically moved to the right by the distance (l) by a signal from the control circuit, Reverse the platen (10) and
6) is returned by the distance (m), and the printing position (b) is moved to after the printed character "C". Then, after that, the carriage (24) is moved in the same manner, and the platen (10) is rotated, so that the pen printing mechanism (52) can print on the paper (16).

In the illustrated embodiment, the carriage (24) is provided with the pen type printing mechanism (52) and the impact type printing mechanism (38). But,
The other printing mechanism provided with the pen printing mechanism is not limited to the impact printing mechanism, and may be a known dot printing mechanism, thermal printing mechanism, ink jet printing mechanism, or the like.

Further, in the illustrated embodiment, one pen is used as the pen printing mechanism.
Those with (60) are shown. However, the pen is not limited to one pen, and may be provided with different colours, with a water-based one and an oil-based one, or with a plurality of pens so that they can be appropriately selected and used.

Further, in the illustrated embodiment, the pen printing mechanism (52) is attached to the platen.
It was provided on the left side of the carriage (24) toward (10). This is because if it is provided on the right side of the carriage, the carriage must move further to the left when printing on the left side of the paper (16), and the front width of the printing device must be increased. This is because if it is provided in the center of the, it will overlap with other printing mechanisms, and this will cause design difficulties.
However, it is not impossible to place the pen printing mechanism on the right side or the center of the carriage. It is possible to further develop and provide the pen printing mechanism on both sides of the carriage.

In the illustrated embodiment, the pen printing mechanism (52) and other printing mechanism (38)
The case where the printing positions (a) and (b) of (1) are displaced in the vertical direction by the distance (m) has been described. However, like the paper retainer (94) shown in FIG. 7, it is possible to make the printing window (96) for another printing mechanism and the printing hole (98) for the pen printing mechanism the same height. This facilitates switching from other printing to pen printing or vice versa.

Furthermore, in the embodiment, the printing window (8) of the other printing mechanism (38) is
2) is a circular hole. However, the paper retainer (100) shown in FIG.
As described above, the printing window (102) may be a notch such as a rectangle.

In FIG. 1, the alternate long and short dash line indicated by reference numeral (104) is a ribbon cassette that houses the ribbon (48) and is mounted on the carriage (24).

As shown in FIG. 9, cutouts (1
If 08) is provided and pen printing is performed through the notch, an accident such as the side edge catching the paper when the carriage is moved will occur. However, in the paper retainer of the illustrated embodiment, circular or rectangular print holes are formed in the paper retainer, and pen printing is performed through the print holes. Therefore, it is possible to form a bend or the like on both side edges of the paper retainer, and there is no possibility that the paper retainer will catch the paper or the inserted paper will be caught by the paper retainer as the carriage moves.

Effect Since the printing apparatus according to the present invention is provided with the pen printing mechanism and other printing mechanism on the carriage, characters / symbols can be beautifully printed, and graphs / figures etc. can be drawn neatly. Further, it is easy to print in various colors.

In the present invention, the positional deviation between the printing positions of the pen printing mechanism and the other printing mechanism is set to an integral multiple of the feed amount per pulse of the carriage and platen feed pulse motor in the length direction and the rotation direction of the platen, respectively. , It becomes easy to align the printing position by both printing mechanism,
The occurrence of print misalignment can be reduced.

Further, by attaching a print mark indicating the print position to the paper presser, it is possible to confirm the print position on the paper with the print mark and perform printing, and it is possible to further eliminate print misalignment.

[Brief description of drawings]

FIG. 1 is a plan view of a printer according to the present invention. FIG. 2 is a schematic diagram illustrating an impact type printing mechanism used in the printing apparatus. 3 and 4 show a pen printing mechanism used in the printer,
FIG. 3 is a side view thereof, and FIG. 4 is a plan view thereof. Fifth
The figure is a front view of a paper retainer used in the printing apparatus. FIG. 6 is an explanatory diagram for explaining switching from printing by the impact type printing mechanism to printing by the pen printing mechanism in the printing apparatus. FIG. 7 and FIG. 8 are front views of other paper retainers, respectively. FIG. 9 is a front view of the paper retainer for explaining the effect of the embodiment. (10) …… Platen (22) …… Platen feed pulse motor (24) …… Carriage (34) …… Carriage feed pulse motor (38) …… Impact type printing mechanism (50) ・ (94) ・ (100) ...... Paper presser (52) ...... Pen printing mechanism (82) ・ (96) ・ (102) …… Printing window (84) ・ (98) …… Printing hole (86) ・ (88) ・ (90) ・(92) …… Print mark (a) ・ (b) …… Print position (l) ・ (m) …… Displacement of print position (p) ・ (q) …… Both ends of paper presser

 ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-54-156725 (JP, A) JP-A-53-9621 (JP, A) JP-A-57-102359 (JP, A)

Claims (2)

[Claims] 1. A pen printing mechanism and another printing mechanism are provided together on a carriage, and the carriage is reciprocated along a platen by a carriage feed pulse motor, and
In a printing apparatus for printing paper on the platen while setting the paper on the platen and sequentially rotating the platen with a platen feed pulse motor to feed the paper, the pen printing mechanism in the length direction of the platen And the positional deviation of the printing position of the other printing mechanism is set to an integral multiple of the carriage feed pulse per pulse of the carriage by the carriage feed pulse motor, and the positional deviation in the rotation direction of the platen is determined by the platen feed pulse motor. The printing device, which is an integral multiple of the feed amount per pulse of the platen according to 1. 2. A paper presser having a print mark indicating the print position is attached to the carriage so as to face the platen along the platen with a slight gap. The printer according to item 1.