JPH0263885A - Printing line alignment means of serial printer - Google Patents

Abstract

PURPOSE:To easily perform the alignment of a printing line by switch operation by providing a position control means equipped with a position reading means for allowing a reflecting type photosensor to detect the passage of the rule of printing paper and a platen driving device for feeding printing paper by a position judge control circuit calculating a proper printing position. CONSTITUTION:A position reading means 1 is equipped with a reflecting type photosensor 2 and a sensor reading circuit 3, and the reflecting type photosensor 2 is mounted to the front surface of the carriage 12 of a serial printer in opposed relation to a platen 10 while the sensor reading circuit 3 allows the photosensor 2 to detects the passage of the rule of the printing paper 15 fed on the platen 10. A position control means 4 is equipped with a platen driving device 5 and a position judge control circuit 6 while the position judge control circuit 6 inputs the detection signal of the rule of the printing paper due to the reflecting type photosensor 2 to calculate a proper printing position. The platen driving device 5 is subjected to driving control on the basis of the signal from the position judge control circuit 6 and drives the platen 10 to feed the printing paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a serial printer, and particularly to a print line alignment means for a serial printer.

[Prior Art] Conventionally, printing line alignment means for this type of serial printer manually rotates a platen to align the printing line using a position mark on a card holder of the serial printer as a guide.

[Problems to be Solved by the Invention] The above-mentioned conventional serial printer manually aligns the print line position, so there is a drawback that the printed characters may deviate from the ruled lines or overlap. The problem is that it requires a considerable amount of effort and experience.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned problems, and includes a reflective photosensor attached to the front surface of a carriage of a serial printer, and ruled lines on printing paper that is fed onto the platen to the reflective photosensor. a position reading means equipped with a sensor reading circuit for detecting passage of the platen; a position judgment control circuit for calculating an appropriate printing device according to the interval between the ruled lines from the detected position of the ruled lines by the reflective photosensor; and a position judgment control circuit for rotating the platen. It consists of a position control means equipped with a platen driving device that drives and sends the printing paper to the appropriate printing position calculated by the position judgment control circuit, and it is possible to easily align the printing line position by operating a switch. be.

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a schematic diagram of a serial printer.

In FIG. 2, 10 is a platen, 11 is a print head, 12 is a carriage, 13 is a shaft, 14 is a card holder with print line alignment marks, and 15 is a lined printing paper.

The print line alignment means of the serial printer of the present invention consists of a position reading means 1 and a position control means 4.

The position reading means 1 includes a reflective photosensor 2 and a sensor reading circuit 3, and the reflective photosensor 2 is mounted on the front surface of the carriage 12 of the serial printer, facing the platen 10. And it emits light to the platen 10 at all times. The sensor reading circuit 3 is
The photo sensor 2 is made to detect the passage of the ruled line 15a of the printing paper 15 being sent over the platen 10. That is, when the print paper 15 is fed over the platen 10 and the ruled lines 15a of the print paper 15 cross the light emitted from the reflective photosensor 2, this will be detected as an electrical signal.

The position control means 4 includes a platen drive device 5 and a position judgment control circuit 6, and the platen drive device 5 includes a drive circuit 5a and an LF motor 5b, and drives the platen 10 in rotation.

The position judgment control circuit 6 inputs the detection signal of the ruled lines of the printing paper on the reflective photosensor 2 from the sensor reading circuit 3, and calculates an appropriate printing position according to the interval between the ruled lines, etc. from the input detection position. . Data on the appropriate print position according to the interval between ruled lines, etc. is manually input into the position determination control circuit 6 in advance, and the print position is calculated based on the difference from the detected position.

The platen driving device 5 is connected to the position determination control circuit 6. The platen drive device 5 is driven and controlled by a signal output from the position judgment control circuit 6, and the platen 1
0 to send the printing paper to the appropriate printing position.

Next, the operation of the print line positioning means of the serial printer of the present invention will be explained with reference to FIG.

First, the lined printing paper 15 is sucked between the platen 10 and the card holder 14, and then the upper and lower ruled lines 15a of the line to be printed sandwich the mark on the card holder 14, as shown in FIG. 3(a). . Next, when the switch is pressed, the platen drive device 5 is activated to rotate the platen 10 to perform a changeover operation. When the reflective photosensor 2 detects the lower ruled line 15a as shown in FIG. 3(b), this signal is sent to the position determination control circuit 6, which immediately stops driving the platen 10. Thereafter, the platen 10 is driven again to send the printing paper to the printing position set by the position judgment control circuit 6 (FIG. 3(C)).

[Effects of the Invention] As explained above, the present invention detects the ruled lines of printing paper using a reflective photosensor and a sensor reading circuit, and based on the detected position, determines the appropriate position set by the position judgment control circuit and the platen drive device. By feeding the printing paper to a suitable printing position, it is possible to easily and accurately align the printing line appropriately according to the ruled line spacing, etc., by simply operating a switch.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a schematic diagram of a serial printer of the present invention, and FIG. 3(a), (
b) and (c) are operation explanatory diagrams of the present invention. 1: Position reading means 2: Reflective photo sensor 3: Sensor reading circuit

Claims (1)

[Scope of Claims] Position reading means comprising a reflective photosensor attached to the front surface of a carriage of a serial printer, and a sensor reading circuit that causes the reflective photosensor to detect passage of a ruled line on printing paper sent on a platen. , a position judgment control circuit that calculates an appropriate printing device according to the interval between the ruled lines, etc. from the detected position of the ruled line by the reflective photo sensor; and a position judgment control circuit that rotates the platen to the appropriate printing position calculated by the position judgment control circuit. A print line positioning means for a serial printer, comprising a position control means having a platen drive device for feeding printing paper.