JPH0798416B2 - Printer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a printer device suitable for optionally specifying a line feed pitch for printing.

(Prior Art) For example, in a serial printer, the paper fed between the tip of the print head and the platen by a single-cut inserter is conveyed to a print start position by a paper feeding mechanism built in the main body of the apparatus, and one line After the minute is printed, it is sent to the next print start line according to the line feed pitch specified by the host device. The line feed pitch is a line distance specified in advance during printing. Usually, a plurality of line feed pitches are prepared in advance, and by designating an arbitrary line feed pitch among them, the number of lines that can be printed on one sheet of paper is determined.

By the way, when the paper is fed according to the specified line feed pitch, friction occurs between the paper and the print head or the platen. This is because the paper set between the tip of the print head and the platen is unstable, and when the paper is fed, it is biased to either the print head or the platen. Then, in the printer device in which the paper feeding mechanism is built in the main body of the device and the paper is fed to the one-line printing sheet from the inside of the main body in the single-cut inserter direction,
Friction caused by such a deviation of the sheet becomes an obstacle to the sheet feeding, and there is a drawback that the sheet is bent between the portion where the friction occurs (the contact portion between the sheet and the print head or the platen) and the sheet feeding mechanism. When a single-cut inserter equipped with a paper feed mechanism is used, the paper is fed while being pulled up to the single-cut inserter side, so that there is no bending.

Such a deflection of the paper is more likely to occur as the line feed pitch is larger, that is, as the paper feed amount is larger. However, if the line feed speed (paper feed speed) at that time is lowered and the paper is conveyed, it may be restored by the paper restoring force. Can be reduced.

However, conventionally, regardless of the size of the line feed pitch,
It is configured to always feed the paper at a constant line feed speed, and
Since the line feed speed was set relatively high for the purpose of improving throughput, it is not possible to reduce the deflection of the paper when the line feed pitch is large. There was a drawback that caused a drop.

Further, when multi-part paper (paper consisting of many parts with carbon paper interposed) is used, there is a problem in that printing cannot be performed because of such a tendency.

(Problems to be Solved by the Invention) As described above, conventionally, when the line feed pitch is large, the paper feed is performed at a relatively high line feed speed as in the case where the line feed pitch is small. Therefore, the deflection of the paper cannot be reduced, For example, there is a drawback that the paper feed accuracy is deteriorated due to paper skew, line feed pitch deviation, and the like.

The present invention has been made in view of the above points, and in a printer device capable of optionally specifying a line feed pitch to perform printing, particularly when the line feed pitch is large, it is possible to prevent bending of the paper, and It is an object of the present invention to provide a printer device capable of always performing normal printing at a specified line feed pitch without deteriorating the paper feed accuracy such as the skew and line feed pitch deviation.

[Configuration of the Invention] (Means for Solving the Problems) That is, the printer device according to the present invention is a printer device that feeds a single-cut sheet in accordance with a line feed pitch designated by the host device after printing one line. In the above, at least the first line feed speed data and the second line feed speed data in which the line feed speed is set slower than the first line feed speed data are prepared, and the reference line feed in which the designated line feed pitch is preset is set. If the pitch is smaller than the above, the first
The paper feed means is driven based on the line feed speed data of 1), and when the designated line feed pitch is larger than the reference line feed pitch, the paper feed means is driven based on the second line feed speed data.

(Operation) According to the above configuration, the cut sheet is fed at the line feed speed according to the line feed pitch. In this case, if a line feed pitch larger than the standard line feed pitch is specified, the cut sheet will be sent later than when the line feed pitch is smaller than the standard line feed pitch. Therefore, if the line feed pitch is large,
As the line feed speed becomes slower, the bending of the paper at that time can be reduced by the restoring force of the paper.

(Embodiment) Hereinafter, a printer device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the circuit configuration. Before describing the circuit configuration, the configuration of the printing mechanism section will be described with reference to FIGS. 2 and 3.

FIG. 2 is a front view showing the construction of the printing mechanism section of the embodiment, and FIG. 3 is a side view thereof, which is fed between the tip of the print head 11 and the platen 12 by a single-cut inserter (not shown). The single-cut sheet (hereinafter, simply referred to as a sheet) 13 is conveyed in the direction of arrow A to the print start position by the single-sheet rollers 14a and 14b, which are sheet feeding mechanisms built in the apparatus body.

When the paper 13 is conveyed to the print start position, the print head 11
The carriage 15 carrying the carriage moves in the axial direction of the platen 12, and as the carriage 15 moves, the print pins built in the print head 11 project toward the platen 12 via an ink ribbon (not shown). By the protrusion of the print pin, the ink of the ink ribbon is applied on the paper 13 to form dot characters. When printing of one line is completed in this way, the paper 13 is sent in the direction of arrow B to the next print start line according to the line feed pitch designated by the host device. The line feed pitch is a line distance specified in advance during printing. Normally, multiple line feed pitches are prepared in advance, and by specifying an arbitrary line feed pitch among them,
The number of lines that can be printed on one sheet of paper is determined.

Next, the circuit configuration of FIG. 1 will be described. FIG. 1 is a block diagram showing a circuit configuration of the same embodiment, and a control unit 21 that controls the entire apparatus includes a memory 22. In this memory 22, the first line feed speed data, the second line feed speed data in which the line feed speed is set to be slower than the first line feed speed data, and the reference line feed pitch are stored in advance. The first and second line feed speed data are the number of step pulses to be given to the cut sheet feed motor drive circuit 25, which will be described later, when the sheet 13 is fed to the next print start line. The reference line feed pitch is a line feed pitch necessary for properly using the first and second line feed speed data and is set in advance.

A print head drive circuit 23, a carriage motor drive circuit 24, a single-cut feed motor drive circuit 25, and an interface circuit 26 are connected to the control unit 21. The print head drive circuit 23 drives the print head 11. The carriage motor drive circuit 24 drives the carriage motor 27. The carriage motor 27 is a motor for driving the carriage 15, and is a step motor. The cut sheet feeding motor drive circuit 25 drives the cut sheet feeding motor 28. The single-cut feed motor 28 is a motor for driving the single-cut rollers 14a and 14b, and is composed of a step motor. The interface circuit 26 sends and receives data to and from the host device 29. The host device 29 transfers print data including a line feed pitch command.

Next, the operation of the embodiment will be described with reference to the flowchart shown in FIG.

When the sheet 13 is fed between the tip of the print head 11 and the platen 12 by the cut sheet inserter (step S1), the control unit 21 drives the cut sheet rollers 14a and 14b to move the sheet 13 to the print start position. Send in the direction of arrow A (step S2). Then, when the control unit 21 drives the print head 11 and the carriage 15 to finish printing for one line (step S3), the paper 13
Is sent in the direction of arrow B to the next print start line according to the line feed pitch designated by the host device 29.

In this case, when the paper 13 is fed, it may be biased to either the print head 11 or the platen 12. Paper 13
Is biased, a frictional force is exerted, and as shown in FIG. 3, the friction generating portion (paper 13 and print head 11 or platen 12
The paper 13 bends between the contact portion) and the single-cut rollers 14a and 14b. Such a deflection of the sheet 13 is more likely to occur as the line feed pitch is larger, that is, the sheet feed amount is larger.

Therefore, the control unit 21 compares the line feed pitch designated by the host device 29 with the reference line feed pitch stored in advance in the memory 22 at the time of sheet feeding (step S4), and as a result, the above-mentioned designation is made. If the line feed pitch is smaller than the standard line feed pitch, the first line feed speed data is stored in the memory 22.
From the memory 22 (step S5), and if the specified line feed pitch is larger than the reference line feed pitch, the second line feed speed data is read from the memory 22 (step S6).
This is given to the single-cut feed motor drive circuit 25. The single-cut feed motor drive circuit 25 drives the single-cut rollers 14a and 14b based on the line feed speed data. As a result, the paper 13 is fed to the next print start line at the line feed speed according to the designated line feed pitch (step S7).

In this case, the line feed speed of the second line feed speed data is set to be slower than that of the first line feed speed data. Therefore, if a line feed pitch larger than the standard line feed pitch is specified, the paper 13 will be sent later than when the line feed pitch is smaller than the standard line feed pitch. This allows
When the line feed pitch is large, the line feed speed becomes slower,
The bending of the paper 13 at that time can be reduced by the restoring force of the paper 13.

In this way, the paper 13 is fed at the line feed speed according to the line feed pitch. Therefore, when the line feed pitch is large, it is possible to reduce the deflection of the paper 13, and when printing is performed by optionally specifying the line feed pitch, for example, the paper
Printing can be performed without incurring fixed sheet feeding accuracy such as 13 skew and line feed pitch deviation. It is also possible to print using multi-part paper (paper consisting of many parts with carbon paper interposed).

Furthermore, since the line feed speed can be increased when the line feed pitch is small, the throughput can be improved.

In the present embodiment, two types of line feed speed data are prepared and the line feed speed is switched in two steps. However, the present invention is not limited to this, and a plurality of line feed speed data may be prepared. By setting it, it is possible to switch the line feed speed in multiple stages according to the designated line feed pitch, and even in this case, the same effect as in the above embodiment can be obtained.

EFFECTS OF THE INVENTION As described above, according to the present invention, since the cut sheet is fed at the line feed speed according to the designated line feed pitch, the deflection of the paper that is likely to occur especially when the line feed pitch is large is prevented. Can be prevented. As a result, normal printing can always be performed at the specified line feed pitch without deteriorating the paper feed accuracy such as paper skew and line feed pitch deviation.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration according to an embodiment of the present invention, FIGS. 2 and 3 are diagrams showing a configuration of a printing mechanism portion of the same embodiment, and FIG. 2 is a front view thereof. , Third
FIG. 4 is a side view thereof, and FIG. 4 is a flow chart for explaining the operation of the same embodiment. 11 …… print head, 12 …… platen, 13 …… paper, 14a
And 14b …… Single-cut roller, 15 …… Carriage, 21 ……
Control unit, 22 ... Memory, 23 ... Print head drive circuit, 24
...... Carriage motor drive circuit, 25 ...... Cut sheet feed motor drive circuit, 26 ...... Interface circuit, 27 ...... Carriage motor, 28 ...... Cut sheet feed motor, 29 ...... Host device.

Claims (1)

[Claims] 1. A printer device for feeding single-cut sheets in accordance with a line feed pitch designated by a host device after completion of printing one line, and a paper feed means for feeding the single-cut sheets, at least a first sheet feeding means. The storage means storing the line feed speed data and the second line feed speed data in which the line feed speed is set to be slower than the first line feed speed data is compared with the specified line feed pitch and the preset reference line feed pitch. According to the comparison means and the comparison result of the comparison means, if the specified line feed pitch is smaller than the reference line feed pitch, the paper feed means is driven based on the first line feed speed data to specify the designated line feed pitch. And a drive control means for driving the paper feeding means based on the second line feed speed data when the line feed pitch is larger than the reference line feed pitch. A printer device characterized by being provided.