JPS58131085A - Medium-feeding system - Google Patents

Abstract

PURPOSE:To provide the titled system wherein a calculating means is provided in a controlling part which controls a medium-feeding part, calculations are conducted in accordance with the size of a character to be printed and a predetermined line space, and the medium is fed in accordance with the results of the calculations. CONSTITUTION:A character height calculator 26, a memory 27 and a calculator 28 are provided as calculating means in the controlling part 14' indicated by a dotted line. The character height calculator 26 calculates the character height from data (a) on the chacter to be printed, and outputs the character height when a line-shifting command (b) is inputted. The memory 27 stores the character height, and outputs old data as a character height H1 for the preceding line when new data of a character height H2 for the new line are inputted. The calculator 28 calculates a line-shifting feed quantity F from the character height H2 for the new line, the character height H1 for the preceding line and the predetermined line space I stored in itself, then calculates the number (f) of pulses corresponding to the feed quantity F, and outputs the number (f). A pulse generator 24 outputs pulses corresponding to the feed quantity F, whereby a step motor 5 is rotated, and the medium is fed by the desired feed quantity F.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to the medium transport of a wire dot printer% Ql norreal printer, and is an improvement of a medium transport method that can change the line feed amount according to the print size. −〇Related.

Φ) Technical background In recent years, various printers, including combiator printers and word processors, have been developed and put into practical use.

The printing paper for these printers is often continuous paper such as single slips and continuous slips that have feed holes on both sides of the paper, or continuous paper such as roll paper that does not have feed holes. Both have formats printed on them and blank ones.

The present invention is generally applied when using blank printing paper. When printing on these printing papers, the size of the characters may vary depending on the printing purpose, but it is desirable to be able to print with line spacing appropriate to the size of the characters.

(C) Prior Art and Problems The conventional method will now be described using a wire tod printer as an example with reference to FIGS. 1 and 2. No. 19 is a plan view of the wire tod printer, and FIG. 2 is a side view of the media feeding mechanism shown in FIG. 1. Transfer section, 3, 6.2
3 is a pulley, 4.18 is a grain roller, 5.19 is a step motor, 7.17.24 is a bell, 8 is a guide roller, 9 is a side frame, 10 is 1 latin, 11 is a printing paper, 11' is &3 Paper section, l1m is roll paper, 12
is a roll core, 13 is a carrier, 14 is a control unit, 15 is a feed screw, 16 is a feed screw, 20 is an ink ribbon cassette, 20m is an ink ribbon, 21 is a print head,
22 is a winding section, 22a is a winding shaft, 22b is a reel,
23 is a clock pulse generator, 24 is a pulse generator, 2
5 does not require a step motor driver!$-.

As shown in No. 11, the wire tod printer has a side frame 9, on which a 7' latin 10 is rotatably supported.

A printing paper 11 is wrapped around the platen 10.
The printing paper 11 is fed in the direction of the middle arrow A by two and four feeding rollers as shown in Fig. wJ2. - A carrier 13 is slidably fitted to a guide shaft 15 provided parallel to the platen 10 on the front surface of the cover platen 10, and the carrier 13 is also provided parallel to the platen 10. It is threadedly engaged with the feed screw 16. The feed screw 16 is connected to a step motor 19 via a belt 17 or the like, and therefore, the feed screw 16 moves the carrier 13 in the direction indicated by the arrow 0 in the figure by the forward and reverse rotation of the step motor 19. It can be moved in the D direction. An ink ribbon cassette 20 is mounted on the carrier 13, and a part of the non-electrified ink ribbon 20JI is attached to the cassette 20 at the platen 10@
It is built-in and exposed. Sumita, career 13
A print head 21 is installed surrounded by an ink ribbon cassette 20, and the print head 21 is provided with a plurality of print magnets for forming prints using dots. Normally there are 7 to 24 printing magnets.
There are several.

In addition, the media feeding mechanism is connected to the print head 21 as shown in FIG.
is located on the left side of the figure.1. A platen 1O is arranged opposite to this, and behind it, on the right side in the figure, a paper feed section 11' storing a roll paper 118 of printing paper 11 is provided. The paper feed section 11' is supported by a support shaft 1 with which a roll core 12 of a roll paper 111 contacts with a light frictional force. Also, platen 1
A paper transport section 2' is arranged from the bottom to the rear of the paper.

The paper transport s 2 / is composed of a feed roller 2, a pulley 3 coaxial with the feed roller 2, a step motor 5, a pulley 6 attached to the motor shaft, and a belt 7 connecting the pulleys 3 and 6. A winding section 22 is disposed to remove the force of the bent paper feed section 11', and the winding section 22 is connected to a winding shaft 22g.
The winding reel 22b and the pulley 23 are attached to the winding reel 22b and the pulley 23. Pulley 3 and pulley 23 are connected by a belt 24. Print paper 11 stored in paper feed s11'
moves in the direction of the arrow in the figure, is pressed against the surface of the platen 10 by the pressure roller 18, and is wound around the platen IO.

The printing paper 11 further advances to the paper transport section 2', is pressed by the pressure roller 4, is pushed by the feed roller 2, is guided by the guide roller 8, and is wound onto the winding reel 22b of the winding pile m22. It has become.

Further, in the control section 14 indicated by a dashed line, a clock pulse generator 23 generates a clock pulse with a period of one leg. When the line feed command signal is input, the pulse generator 24 synchronizes with the clock pulse and generates pulses for one car change (e.g., 8 pulses), and these pulses drive the step motor 5 via the step motor driver 25. It has become.

With this configuration, when the print head 21 operates, the print wire of the print magnet collides with the print paper 11 on the platen 10 shown in Figure 1 via the ink ribbon 20m, and printing is performed, and the print head 21 prints on the printing paper 11 while moving in the direction of the arrow along with the carrier 13.

- When the printing for the character is completed, the paper transport section 2' shown in FIG. 2 is driven to transport the printing paper 11 in the direction of arrow A by the required amount of tension for line feed. Various feeding amounts such as 1/3 inch, 175 inch, and 1/6 inch are used to feed the printing paper 11, but each size is fixed. These feedings are performed by sending corresponding pulses to the step motor 5 to rotate the paper and drive the paper transport section 2'.

However, recently it has become common to print by changing the size of the characters depending on the purpose. If large characters are printed in such a case, the upper and lower characters may overlap, which may impair print quality.

- If the printing interval is widened to prevent this, the margin between the lines will be too wide when printing small T characters, which is not only unfavorable in terms of appearance but also uneconomical. As described above, the conventional method has the disadvantage that it is difficult to maintain a balance between character size and line spacing.

-) Purpose of the Invention The purpose of the present invention is to solve the above-mentioned drawbacks.The purpose of the present invention is to provide a medium feeding method that can change the line feed feed amount depending on the size of printed characters.<6) Structure of the Invention The present invention includes a platen member, a printing unit including a print head facing the platen member with a gap therebetween, a medium transport unit that transfers a medium set in the gap between the printing unit and the platen member, and In the printer device, the control section for controlling the medium transport section is provided with a calculation means, and the control section for controlling the medium transport section is provided with a drive section for moving a section parallel to the medium, and prints on the medium using the print head. This is a medium feeding method in which the calculating means performs a calculation based on the desired size of the print and a predetermined line spacing of the print, and the medium transfer section performs the transfer based on the calculation result. By doing this, the desired feed amount can be obtained.

(f) Embodiment of the Invention An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. FIG. 3 is a plotter diagram showing an embodiment according to the present invention, and FIG. 4 is an explanatory diagram of the calculation in FIG. 3. In the figure,
14' is a control unit, 26 is a character height calculator, 27 is a memory, 28 is a calculator, F is a line feed feed fi, Hs is a previous line character height, H is a new line character height, ■ is a character line The interval f indicates the number of line feed pulses, and the same parts as the second WJ are indicated by the same symbols.

The control unit 14' shown by the dashed line in FIG. ! 1F2B
is provided. The character height calculator 26 calculates the character height from the printed character data, and outputs the character height when a line feed command is input. The memory 27 stores character height data and sets the new line character height H.

When new data is input, the old data is changed to the previous line character height Hl.
Output as . In addition, the operator 28 calculates the line feed feed amount F from the new line character height H3, the previous line character height Hl shown in FIG. 4, and the predetermined character line interval I stored in the operator 28,
The corresponding number of pulses f is calculated and output.

With such a configuration and function, when changing the character size and performing line feed to have the desired character line spacing I, the new line character height H3 calculated based on the printed character data is used. and the previous line character height output from memory 27 is 8 Hr.
When input to the calculator 28, the calculation is performed according to the following equation.

Cross line spacing I Here, it is assumed that the character line spacing I is set to a specific value by the printer. Therefore, when the number of pulses f corresponding to the calculated line feed feed amount F is output, pulse generation 1
Based on the 1111m4 beam pulse, a line feed pulse is generated and outputted, and the step motor 5 is rotated via the step motor twister 25. The feed roller 2 then transports the printing paper 11 by a line feed distance F. In this way, desired line feed can be performed.

(2) Effects of the invention As explained above, according to this shield, the line feed amount can be determined and sent by calculation according to the size of the printed character, so it is possible to calculate the line feed amount according to the size of the printed character and send it. This has the effect of preventing line spacing and ensuring print quality. This has the effect of preventing excessive margins on printing paper due to line spacing in the case of small-sized characters, and making it more effective to use.

[Brief explanation of the drawing]

FIG. 1 is a plan view illustrating a wire tod printer, FIG. 2 is an ll1rfJ diagram showing the medium feeding mechanism of FIG. 1, FIG.
The figure is #! FIG. 3 is an explanatory diagram of the calculation in FIG. 3; In FIG. 1, 2 is a feed roller, 3.6 is a pulley, 5 is a step motor, 7 is a belt, 11 is a printing path, 14.
14' is a control unit, 23 is a clock pulse generator, 24 is a pulse generator, 25 is a step motor driver (, 26
is the character height calculator, 27 is the memory, 2B is the calculation opening, F is the line feed feed amount, HI is the previous line character height, H8 is the new line character height, ■ is the character line spacing, and f is the number of line feed pulses. show. Figure 11'f; Figure I; Figure 14

Claims (1)

[Claims] A printing section that passes through the print head facing the platen member with a gap therebetween, a medium transfer section that transfers the medium set in the gap between the core printing section and the U-distribution platen member, and Fi! In a two-printer device, which is composed of an IIA section for moving the I printing section to the front 6-pin medium heat and bamboo, and performs printing on the medium K MiJ printing section with a rad, the Ir1
J distribution media transfer department f61! A calculation means is provided in the control section to calculate f by the performance means according to the desired thickness of the print by the print head and the desired line spacing of the print.
The 16W transfer method is characterized in that the calculation result is used to stop the transfer by the medium transfer s.