JP2006044147A - Sheet-forward controlling method of dot-line printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cut the extra power consumption more than required for a sheet-forward motor in performing printing with usual sheets of small sheet-transferring load while reducing the heat generation of the sheet-forward motor. <P>SOLUTION: Both the sheet-forward motor driving current capable of corresponding to even the same special sheet as former and the same motor driving current corresponding to only the usual sheet are prepared.The two types of current can be made switched with the phase of an eccentric cam adjusting the gap between a platen and hammer bank, thereby the problem can be solved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a paper feed control method for a dot line printer.

  FIG. 2 shows an outline of the printing mechanism of the dot printer.

  The hammer mechanism unit 1 having a printing element reciprocates in the digit direction by a shuttle mechanism unit (not shown). The hammer mechanism unit 1 is disposed in a state where the ink ribbon 2 and the printing paper 3 are sandwiched therebetween and opposed to the platen 4 for supporting the printing force, and the hammer mechanism unit 1 reciprocates. Each time the printing element is driven in a timely manner, characters, figures, etc. are printed on the printing paper 3 in the form of a dot matrix. The printing paper 3 is fed in the row direction by a paper feed mechanism unit 9 using a paper feed motor 8 at an appropriate time in the process.

  Usually, since the dot printer also supports special paper such as copy paper, the drive current of the paper feed motor 8 is set according to the special paper having a large transport load.

  For this reason, when printing on normal paper with a small transport load, more power is consumed than necessary. However, in a conventional dot printer, the drive current of the paper feed motor 8 can be changed by load fluctuations due to optional attachment / detachment. (For example, refer to Patent Document 1).

JP 2003-276258 A

  As described above, dot printers that use a wide variety of paper consume paper that consumes more power than necessary during normal paper printing in order to handle special paper with a heavy paper load. The power consumption of the printer and the heat generation of the paper feed motor were increased more than necessary.

  An object of the present invention is to provide a control method that overcomes the above-described problems, reduces power consumption, and suppresses heat generation of a paper feed motor.

  In order to solve the above-described problems, in the present invention, a hammer mechanism portion equipped with a plurality of printing elements, a shuttle mechanism for reciprocating the hammer mechanism portion in the digit direction, and a thickness of printing paper to be used are set. And a mechanism for detecting a set knob position, at least a pair of tractors for conveying printing paper, a tractor drive shaft for holding and driving the tractor, and a paper feed motor for supplying power for rotating the tractor drive shaft The printer is characterized in that the drive current of the paper feed motor is variable according to the setting value of the knob for setting the thickness of the printing paper to be used. .

  By preparing and switching the drive current of the paper feed motor that supports special paper and the drive current of the paper feed motor that supports normal paper with a small paper transport load, it is more than necessary when printing normal paper conventionally. It is possible to reduce the consumed electric power and reduce the heat generation of the paper feed motor.

  The present invention will be described with reference to FIG.

  The platen 4 that supports the striking force of the printing element is disposed at a position facing the hammer mechanism 1, and the eccentric cam 5 can adjust the gap between the platen 4 and the hammer mechanism 1. Yes.

  The phase of the eccentric cam 5 can be set by a knob 6 via a shaft. Depending on the type of printing paper 3 to be used, the knob 6 is rotated clockwise or counterclockwise, and the platen 4 and the hammer mechanism. Printing is performed by adjusting the gap between the parts 1.

  When the printing paper 3 to be used is a special paper having a large paper conveyance load, the knob 6 is rotated in the clockwise direction to widen the gap between the platen 4 and the hammer mechanism 1 and perform printing.

  The knob 6 is provided with an optical sensor 7 for detecting the phase of the eccentric cam 5 and determining whether or not the paper is a special sheet. The phase of the eccentric cam 5 is the same as that of the platen 4. When it is detected that the gap between the hammer mechanism portions 1 is greater than a certain value, the paper is determined to be special paper.

  In the paper feed control of the present invention, a paper feed motor drive current used conventionally and a paper feed motor drive current corresponding to normal paper are prepared, and the optical sensor 7 determines that the paper is not special paper. Only in this case, by setting the paper feed motor driving current corresponding to the normal paper, it is possible to reduce the power consumed conventionally and to suppress the heat generation of the paper feed motor.

It is principal part sectional drawing which shows the Example of this invention. 1 is a perspective view showing an overall configuration of a general dot printer.

Explanation of symbols

1 is a hammer mechanism, 2 is an ink ribbon, 3 is printing paper, 4 is a platen, 5 is an eccentric cam,
Reference numeral 6 denotes a knob, 7 denotes an optical sensor, 8 denotes a paper feed motor, and 9 denotes a paper feed mechanism.

Claims (1)

Hammer mechanism part equipped with a plurality of printing elements, shuttle mechanism for reciprocating the hammer mechanism part in the digit direction, a knob for setting the thickness of printing paper to be used, and a mechanism for detecting the set knob position And a dot printer having at least a pair of tractors that convey printing paper, a tractor drive shaft that holds and drives the tractor, and a paper feed motor that provides power to rotate the tractor drive shaft.
A paper feed control method for a dot printer, wherein the drive current of the paper feed motor is made variable according to a setting value of a knob for setting the thickness of the printing paper to be used. .

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