JPS5993375A - Serial printer - Google Patents

Abstract

PURPOSE:To provide the titled printer capable of printing characters with an underline at the same speed as that in normal printing and capable of speedily tabulating, wherein a printing mechanism part is provided with a writing means capable of drawing rules on a printing paper. CONSTITUTION:An AND circuit 36 feeds one pulse signal of an underline signal (a) and a pulse signal to a shift register 37, which stores the inputted signal in response to a clock signal fed from a controlling unit 32, and sequentially shifts in an outputting direction. In spacing, when a signal is fed out from an output part of the register 37, a solenoid 28 is driven to press a pen 24 against a paper, and a carriage is spaced by a one-character amount while pressing the pen 24 against the paper, whereby an underline is drawn.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to printers, particularly serial printers of the sequential printing type.

Conventional configurations and their problems In recent years, printers have been required to perform high-speed, high-quality printing.
Printers using type wheels and wire tod printers that perform pixel printing have been developed.

The conventional serial printer (-) will be explained below with reference to the drawings. Figure 1 is a perspective view showing the main parts of a serial printer using a type wheel.
A carriage 6 is movably supported on two guide rods 3 and 4 fixed in parallel with the platen 2 holding the platen. A motor 6 and a printing hammer 7 are mounted on the carriage 5. , 1 is constant. A type wheel 8 is fixed to the rotating shaft of the motor 6, and has a number of spokes 8a extending radially from the center and a type portion at the tip thereof. select.

The printing hammer 7 is used to strike the selected characters onto the printing paper 1, and apply them to the ink ribbon 9 71. Printing is performed by transferring the ink onto printing paper 1.

The carriage 5 moves in the direction shown by arrow A in the figure each time one character is printed, and moves to the printing start position when one line is printed. At the same time, the platen 2 rotates to feed the printing paper 1 by one line. .

However, in such a configuration, when printing a character with an underline, it is necessary to print the character "-°" again without moving the carriage after printing the character, and the printing speed decreases.

When tabulating a table, it is necessary to print vertically and horizontally ruled lines in ``-'' and ``do'' typefaces, which takes a long time. cannot be made very long, so when the line pitch is large, the vertical lines may become broken and cut.

In addition to printing using the type wheel mentioned above, but 2
For example, in the case of a wire tod printer, the number of printing wires is limited, so when printing underlined characters, the character height is lower than normal characters, or when using a dedicated wire for underlining, the resolution decreases. There are other problems.

Purpose of the Invention The purpose of the present invention is to provide a serial printer that can print underlined characters at the same speed as normal printing, can also tabulate tables in a short time, and can also create graphs, etc. Our goal is to provide the following.

Composition of the Invention The 7-real printer of the present invention is equipped with a writing means that can draw lines on printing paper in the printing mechanism section, and is configured so that underlines and ruled lines can be drawn in a short time on 6 pages. It is.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to two drawings.

FIG. 2 is a side view showing the main parts of a typewriter according to an embodiment of the present invention. In the same figure, mark, hand paper 10
The platen 11 holding the platen is rotatably held by left and right side plates 12.13, and is rotationally driven by a platen motor 14 when necessary. A carriage 17 is movably held by two guide rods 16 and 16-F fixed in parallel with the flatten 11, and the carriage blade 8 is connected to gears 40, 41, and a pulley shaft 42. The carriage 17 is moved left and right via the pulley 43 and belt 19. Furthermore, the belt 19 is hung around pulleys 43 and 44.

The carriage 17 includes a type wheel 2o having a plurality of radially extending spokes 20a, each having a type portion at its tip, and a wheel for rotating the type wheel 20 to select the type to be printed. A motor 21, a printing hammer 22 that hits the printing paper 1° with the printing part at a specific position of the printing wheel 2o by energization, and an ink ribbon 23, as a writing means for drawing lines and underlines for graph ink. Equipped with 24 pens, etc.

FIG. 3 is a diagram showing the positional relationship between the printed characters and the pen 24 when the carriage 17 is viewed from the platen 11 side. In the drawing, the type "H" 25 is in front of the printing hammer 22 and the ink ribbon 23 is in a standby position.

The ink ribbon 23 is normally at the standby position shown in the figure, but during printing, it moves upward to a position overlapping the printed characters.

The horizontal distance X between the center of the printing hammer 22 and the center of the pen 24 is 25.4jli (1 inch), and the vertical distance Y is 2.3.
M, and an adjustment mechanism (not shown) allows X,
The value of Y can be finely adjusted. The horizontal distance X is an integral multiple of the printing pitch, and in this typewriter, the printing pitch is /10. /12゜Y7-:・ Since three types of 1/15 inch can be used, 1 inch is determined from the common multiple of the three. 3. Vertical pressure 111Y provides an appropriate gap between the printed characters and the underline when drawing. It is set as follows, and when the print pitch changes and the character size changes, the fine adjustment mechanism is used to adjust it.

FIG. 4 is a partially cutaway side view showing the mechanism for driving the pen 24. In the figure, the pin 24 is screwed onto the slider 26 and can be easily replaced. The slider 26 is supported within the holder 27 so as to be able to move freely in the longitudinal direction of the axis of the pen 24. 28 is a solenoid, which attracts the armature 29 when a drive signal is input. A leaf spring 3o is fixed to the armature 29, and the leaf spring 30 pushes the protrusion of the slider 26. Then, the pen 24 moves toward the platen, and the pen tip 24a is pressed against the printing paper.

The pen tip 24a is pressed with appropriate pressure by the action of the leaf spring 30. When the supply of the drive signal to the solenoid 28 is cut off, the pen 24 moves to the left in FIG. 4 due to the action of the coiled spring 31]7, and the pen tip 24a separates from the printing paper.

FIG. 5 is a block diagram showing the main parts of the control circuit in this embodiment.

The gear carriage control unit 32 sends a signal for controlling the carriage motor 18 to the motor driver 33 based on a carriage control command signal sent from a main control unit (not shown). Solenoid 2 that drives the pen 24
8 is a solenoid control unit 34 including signal delay means;
The solenoid driver 36 receives a signal from the solenoid driver 36.

When underlining is to be drawn at the same time as printing, an underline signal is input to the AND circuit 36 from the main control unit. Further, a signal of one pulse is inputted to the AND circuit 36 from the gear ridge control unit 32 every time the carriage 17 is moved one space. The product signal produced by the AND circuit 36 is sent to the shift register 37. The shift register 37 sequentially stores the signals from the AND circuit 36 using the pulse signal sent from the carriage control unit 32 corresponding to the nine space space feed as a clock pulse. The number of bits in the shift register 37 is changed according to the printing pitch.

At a printing pitch of 710 inches, it functions as a 10-bit shift register, and the signal input to the shift register 37 is output when a clock pulse is input 10 times. Similarly, when the printing pitch is 12 inches, the focus is 12.

At a printing pitch of 145 inches, it operates as a 16-bit shift register. The output of the shift register 37 is input to an OR circuit 38, which sends a sum signal of the graphic signal from the main control unit and the signal from the shift register 37 to the solenoid driver 36.

Solenoid driver 36 controls solenoid 28 that drives pen 24.

When printing underlined characters, an underline signal is input to the solenoid control unit 34. Carriage control unit 32 every time one character is printed.
A 1o page space signal is sent from the main control unit, and a signal to move the carriage 17 by one pitch is sent to the motor driver 33.

At the same time, the AND circuit 36 is also connected to the solenoid control unit 34.
Sends one pulse signal to. The AND circuit 36 creates a product signal from the underline signal and the pulse signal, and sends one pulse signal to the shift register 37. shift register 37
stores input signals in response to clock pulses from the carriage control unit 32, and sequentially shifts them in the output direction in accordance with the clock pulses. Go ahead and print.
Carriage 17 moves to the right, and the 10th mark after typing the underlined character (at the time of 1Ao'' pitch)
After typing the character, a signal is output from the output of the shift register 37 during spacing, and the solenoid 28 is driven to press the pen 24 against the printing paper 10. When the carriage 17 is pressed against the pen 24, an underline is drawn to create a spacing for one character. When underlining is stopped, the main control unit sends an underline signal for one character more to the underline control unit 1.
1 Send to 34. This is because the printing position and pen position are separated by an integral multiple of the printing pitch, so the underline is shifted by half a pitch to the left of the character, so the underline is lengthened by half a pitch evenly on both sides. This is to do so.

When the operator inputs a carriage return after completing one line of input, if no information is stored in the register of the shift register 37, the gear carriage control unit 3
2 sends a signal to the motor driver 33 to return the carriage 17 as is. When information is stored in the registers of the shift register 37, if the information is not stored in all of the registers, the carriage control unit 32 sends a signal to spacing by 1, which eliminates the information in the registers. . If information is stored in all registers, the main control unit sends a graphic signal to the solenoid control unit 34, and the carriage control unit 32 sends a graphic signal to the carriage 17.
A signal is sent to move the carriage 1 inch to the right.
After 7 has moved one inch to the right, carriage 17 returns. In this case, at the same time as the return, the shift register 37
is cleared.

When tabulating or the like, the main control unit sends a graphic signal to the solenoid control unit 34 and simultaneously controls the platen 11 and carriage 17.

As described above, according to this embodiment, since underlining can be drawn at the same time as spacing during printing, underlined characters can be printed at the same speed as normal printing, and ruled lines can be shortened in tabulations, etc. It becomes possible to draw in time.

Note that the pen 24 shown in this embodiment is an ink pen.

Felt pen, ballpoint pen, mechanical pencil, etc.

Either may be used. Furthermore, although the horizontal distance between the pen position and the printing device is set to an integral multiple of the printing pinch, it may be set to a distance that is an integral multiple plus a half pinch, which is particularly suitable when there is no switching of the printing pitch.

Further, in this embodiment, an underline is drawn at the same time as the spacing during printing, but the underline may also be drawn when the carry 13 is returned. Further, although the illustrated embodiment shows a typewriter, the present invention is not limited to typewriters, and may also be used, for example, in wire tod printers, where the printing mechanism and the printing paper are relative to each other. Any serial printer that prints while exercising can be used.

Effects of the Invention As is clear from the above explanation, the present invention has a writing mechanism that can draw lines in the printing mechanism, so even when printing underlined characters, the speed is the same as normal printing. It can be printed with , and vertical and horizontal ruled lines can be drawn, so tabulation can be done in a short time. It is also possible to write not only single tables but also graphs and large letters.

Furthermore, by setting the print position and pen position to a distance that is an integral multiple of the print pinch or half a pitch, it is possible to draw an underline with a simple control circuit. be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of an example of a conventional serial printer, and FIG. 2 is a typewriter that is an embodiment of the present invention.
3 is a front view of the main part showing the positional relationship between the type and the pen in the embodiment of the present invention, and FIG. 4 is a partial cutaway of the mechanism for driving the pen in the embodiment of the present invention. The side view and FIG. 6 are main part block diagrams of the control circuit in the embodiment of the present invention. 1o... Printing paper, 11... Platen, 17... Carriage, 20... Type wheel, 22... Printing hammer, 24...・・・
...Pen, 28...Nlenoid, 29...
... Armature, 34 ... Solenoid control unit, 36 ... Solenoid driver, 3
6...AND circuit, 37...Shift solenoid, 3B...OR circuit.

Claims (1)

[Scope of Claims] (1) A printing mechanism unit that prints characters, symbols, etc. A serial printer characterized by being equipped with a writing means that can draw lines on the printing paper (2) The distance between the center of the printing position and the writing position where the line is drawn by the writing means is equal to the printing pitch in the printing direction. When P, n-Pi or (
n--z)・P (where n is a positive integer),
The serial printer according to claim 1, further comprising an offset amount suitable for drawing an underline by the writing means in a direction perpendicular to the printing direction. (3) The writing means includes a writing instrument and a drive mechanism that presses the writing instrument against the printing paper, and the drive mechanism is connected to a signal delay means that temporarily stores and delays a signal for controlling the writing instrument. The serial pre-balancer according to claim (2). Inter. (Decoy) When the distance in the printing direction between the printing position and the writing position is n-P or <n--z)・P, the signal delay means is composed of a shift register having n registers. A serial printer according to claim (3).