JPS5889377A - Dot printer - Google Patents

Abstract

PURPOSE:To permit a multi-colored fine printing by a method in which printing heads to perform different colors of dot printing are plurally provided and the overlap of dots to be printed by each head is avoided. CONSTITUTION:Plural wire dot heads 34a, 34b and 34c and plural ink ribbons 33a, 33b and 33c of different colors are mounted on a carriage 26, each of which can be independently controlled. A plunger 39 whose working shaft is fixed to the wire dot head 34a is fixed to the upside of the carriage 26 and the wire dot head 34a is shifted by a given amount toward the direction of A by means of a spring when supplying electricity. In the same way, the wire head 34c is also shifted by a given amount toward the direction of B when applying electricity to the plunger 40. Thus, the overlap of dots struck by each head can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dot printer that prints characters in a dot matrix, and more specifically, the present invention relates to a dot printer that prints characters in a dot matrix, and more specifically, a carriage is equipped with a plurality of print heads that print dots of different colors to each other, thereby making printed characters and figures multicolored and detailed. This invention relates to a dot printer configured to enable dense printing.

Ka9 dot printer that generally performs matrix printing
There are dot printers, inkjet printers, thermal transfer printers, etc., each of which has a print head mounted on a carriage and prints in a dot matrix while moving the carriage 1,000 steps toward a platen.

FIGS. 1 and 2 explain the structure of a conventional wire tod printer. In the figures, the printer, which is designated as a whole by reference numeral 1, has left and right side plates 2.5, and a company guide shaft 4 between them. and 5 are horizontally suspended, and a carriage 6 is slidably attached astride both. The timing belt 7 is placed between the two guides 411!14°5 and parallel to them. One end of the timing belt 7 (platen fixed to the outside of the side plate 3 on the right side)
8 is rotatably supported on a shaft, and the other end is hung on a boo '711K integrated with the output shaft of a motor 10 fixed to the outside of the left side plate 2. Carriage 6#
i) Both ends K111 of this timing belt move left and right as the timing belt runs.

On the other hand, a wire tod head 14 and a ribbon feed motor 16 are added to the first carriage 6 so that it can move parallel to the platen 15 together with the ink ribbon 12 which is detachably attached.

Further, a platen 15 is rotatably arranged parallel to the guides 84 and 5 and facing the wire tod head 14 mounted on the carriage 6, and a gear 16 is fixed to the outer end of the rotary shelf of the platen 15. This gear 16 meshes with a gear 18 that is integrated with the output shaft of a motor 17 fixed inside one side plate 6.

Therefore, when the motor 17 rotates once, the platen 15 is rotated through the gears 18 and 16, and the printing paper that has not been melted is sent out at a predetermined pitch.

However, when such a structure is adopted, printing is performed using one wire head and an ink ribbon, so it is impossible to print characters in multiple colors, and it is difficult to make the dot pitch finer.

Our goal is to provide a dot printer that can do the job.

In order to achieve the above object, the present invention is equipped with a plurality of print heads that print dots of different colors on a carriage, and furthermore, if desired, a manual method is provided to shift the print heads so that the dots printed by each head do not overlap. Established.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, the invention will be explained in more detail with reference to the embodiments shown in the drawings.

[lfl The following describes one embodiment of the present invention, and a pair of horizontal and parallel guide shafts 24 . The carriage 25 is suspended horizontally, and both the carriages 8I2 are attached to the carriage 26 so as to be movable. A timing belt 27 is disposed between and parallel to the two guide shafts 24°25. One end of the timing belt 27 is attached to the side plate 26 of the right hook.
A pulley 29 is rotatably supported on a placket 28 fixed to the outer surface of the motor, and a pulley 31 integrated with the output shaft of a motor 30, which is added 1fiI to the outside of the side plate 22 of the left rotor, is mounted on the other end. The sand carriage 26 #i is fixed to a part of this timing belt 27 and moves left and right as the timing belt runs.

Furthermore, the carriage 26 is equipped with a plurality of wire tod heads 54m, 54b, 54C and a plurality of ink ribbons of different colors 62, S2b, 52C. Each of them can be controlled independently.

A platen 55 is rotatably suspended between the left and right side plates 22, 25 parallel to the guide shafts 24 and 25 and facing the wire head heads 64, 34b, and 34c of the carriage 26. A force 1 is fixed to a gear 9 at the outer end of the rotating shaft 35, and this gear 56 is attached to the side plate 2.
It meshes with a gear 58 fixed to the output shaft of a motor 57 fixed inside the motor 37 or l! ! When it rotates once, the platen 65 rotates via gears 58 and 56 to feed printing paper (not shown).

Also, in Fig. 5, Ii6 is an enlargement 1 of the wire tod head 34 of the company 341-1, and 34m-2 shows the printing wire. The wire tod heads 34b and 34C are also completely similar to the head 3431.

Place the wire on the carriage 26)' 34
The plunger 69 with the operating shaft fixed to a is fixed to 9.
1, when energized, the wire tod head 54m held at the position indicated by w44- is shifted by a predetermined amount in the incoming direction by a spring (not shown). Also fixed on the carriage 26 is a plunger 40 whose operating shaft is fixed to a wire tod head 31, and when this plunger 40 is energized, the wire tod head is held at the position shown in FIG. 4 by a spring (not shown). 34Ct-B direction by a predetermined amount. Note that the wire tod head 34b remains fixed to the carriage 26.

FIG. 7 shows each printing wire 54 at 5 o'clock for normal multicolor printing.
In this state, the plunger 39.40 is energized.
The moving direction of the carriage cK is such that the wires of each head are lined up and P1*Psa is an integer multiple of the pitch of the printed dots.

Now, a movement command is input from a control device (not shown) to the motor 60 attached to the side plate 22, and when the motor 50 rotates, the pulley! Turn +1 and turn the belt 27
1 Meiminda belt 2 because it meshes with boots 51
A carriage 26 fixed to a part of the carriage 7 is moved by a predetermined pitch in either the left or right direction.

At this time, a printing command is sent from a control device (not shown) to the wire dot head 34 in synchronization with the movement command to the printer SO.
Hatake, 54b, 54CK input bζ This is the 8th K
As shown in the figure, "mu" and "-" can be printed in different colors.

Next, make a detailed print at 5 o'clock, plunger 59° 40
As shown in Fig. 9, wires 64m-2,5
Arrange 4b-2-54C-2. In this state, the wires of each head are shifted in a direction substantially perpendicular to the moving direction C of the carriage, and the points struck by each head are 5 so that they do not overlap. When printing is performed in this state, more dots can be printed between each nit in the vertical direction than in normal printing, so detailed characters and figures can be printed. FIG. 10 shows an example of printing printed in this manner.

It should be noted that the present invention is not limited to the above-mentioned embodiment, but can also be applied to a 47-unit jet printer and a thermal transfer printer.

As is clear from the above description, according to the present invention, it is possible to provide a dot printer that is capable of multicolor printing and that can easily print detailed characters.

[Brief explanation of the drawing]

Figures 1 and 2 are plane N and normal threshold views for explaining the conventional structure, Figure 3 and the following diagrams illustrate an embodiment of the present invention, and Figures 3 and 4 are plan views of the printer. Figures 5 and 6 are enlarged @ side views and front views of the company's wire tod head, Figures 7-1 and 8 are explanations showing the arrangement of printing wires during normal (multicolor) printing and printed characters. Figures 9 and 10 are explanatory diagrams showing the arrangement of printing wires and printed characters during detailed printing. 21. Life... wire tod printer 22. 25...
...Side plate 24.25..Guide shaft 26-...
, Carriage 27..., Tie-up belt 28... Placket 29, 31... Fu-950
...Motor 52" e 52 b @ 32 C*ehmΦm Incline 33a, 55b, 53C...0 Washin feed motor 541134b @34C...Wire tod head 54m -2e 54b -2 *34c
-2se/se printing wire 56.58/ee*7 gear 370 gates/motor output Canon Co., Ltd. Funishika 4 Overview f diagram ○ 0 @. ○ 0 ・0 0 ・-0 00 ○ ○○ ○ ○ ○ ○ ○○○○○ ○ ○ ○ 0 0・eO・00

Claims (1)

[Claims] This dot printer is provided with a plurality of print heads for printing dots of different colors on a carriage, and is provided with means for shifting the print heads as desired so that the dots printed by each print head do not overlap.