JPS6323097B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a paper feeding mechanism that stabilizes the paper set and simplifies the structure of a horizontal serial printer.

Prior Art and Problems FIG. 1 is a diagram for explaining a paper feeding mechanism of a conventional horizontal serial printer. In the figure, 1 is a paper table, 2 is paper, 3, 3'
4 and 5 are feed rollers for feeding paper, 6 is a sheet stopper, 7 is a sensor, and 8 is a printing section consisting of a printing head 9 and a platen 10, respectively. In this paper feeding mechanism, when setting paper, the feed roller 5 is opened as shown by the solid line, the paper 2 is inserted with the sheet stopper 6 closed as shown by the solid line, and the medium is set by the sensor 7 when it hits the sheet stopper 6. After seeing this, open seat stopper 6 as shown by the dotted line,
The feed roller 5 is closed as shown by the dotted line to complete the sheet setting. Such conventional paper feeding mechanisms have drawbacks such as a complicated structure and the paper being sometimes set diagonally.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a paper feeding mechanism for a horizontal serial printer that is simple in structure and provides stable paper setting.

Structure of the Invention According to the present invention, the object is to provide a paper feeding mechanism in a horizontal serial printer equipped with a horizontally provided Heper table and a printing section, in which two feed rollers for feeding the paper are spaced apart from each other on the same axis. A media set sensor is installed between the two rollers to confirm that the media is set, and a stop sensor is provided to detect the top edge of the media, which serves as a reference for the printing position of the media. The horizontal type serial sensor is disposed in front of and close to the line where the feed roller and the medium come into contact when viewed from a distance, and the stop sensor is placed behind the line where the feed roller and the medium come into contact when viewed from the direction in which the medium travels. This is accomplished by providing a paper advance mechanism for the printer.

Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a diagram for explaining a paper feeding mechanism of a horizontal serial printer according to the present invention, in which a shows a perspective view and b shows a side view. In the same figure, 10
is a paper guide, 11 is a medium, 12, 12' is a feed roller, 13 is a feed roller shaft, 14, 1
4' is a pinch roller, 15 is a medium set sensor,
16 indicates a stop sensor.

In this embodiment, as shown in FIG. 2, two feed rollers 12 and 12' are connected to the same feed roller shaft
3 with a space between them, and the feed roller 1
A medium set sensor 15 for detecting the setting of the medium and a stop sensor 16 for detecting the upper end of the medium which is a reference for the print position of the medium are provided between the medium 11 and the medium set sensor 15 in the traveling direction of the medium 11 (arrow P
), the feed rollers 12, 12'
and before the line 17 where the medium 11 touches and the line 17
, the stop sensor 16 is located close to the media 11
Viewed from the direction of travel, the feed rollers 12,1
2' is located behind the line 17 where the medium 11 is in contact with the medium 11.

In this embodiment configured in this way, the feed rollers 12, 12' and the pinch roller 1 are stopped.
When the medium 11 is inserted between 4 and 14', the medium set sensor 15 detects the medium 11. At this time, the medium set sensor 15 detects the feed roller 1.
Since the medium 11 is disposed close to the line 17 where the pinch rollers 2 and 12' touch the pinch rollers 14 and 14, the medium 11 cannot be detected when the medium 11 is inserted obliquely. Therefore, the medium set sensor 15
When this is detected, it means that the medium 11 has been set correctly. Then, the medium 11 smoothly moves to the feed rollers 12, 12' and the pinch roller 14, without opening or closing the feed rollers.
It bites into 14'. Further, since the stop sensor 16 detects the medium 11 after the medium 11 is caught between the feed rollers 12, 12' and the pinch rollers 14, 14', the detection position accuracy of the upper end of the medium is high.

Effects of the Invention As described above in detail, the paper feeding mechanism of the horizontal serial printer of the present invention does not require a feed roller open/close mechanism or a sheet stopper, has a simple mechanism, and prevents diagonal insertion of the medium. , the effect of stabilizing the media set is significant.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining a paper feeding mechanism of a conventional horizontal type serial printer, and FIG. 2 is a diagram for explaining a paper feeding mechanism of a horizontal type serial printer according to the present invention. In the drawing, 10 is a guide plate, 11 is paper,
12, 12' are feed rollers, 13 is a shaft, 14,
14' is a pinch roller, 15 is a medium set sensor,
16 indicates a stop sensor.

Claims (1)

[Claims] 1. A paper feeding mechanism in a horizontal serial printer equipped with a horizontally arranged paper table and a printing section, in which two feed rollers for feeding the paper are mounted on the same axis with a space between them, and a A medium set sensor is provided to confirm the setting of the medium, and a stop sensor is provided to detect the top edge of the medium, which serves as a reference for the printing position of the medium. placed close to the line;
A paper feeding mechanism for a horizontal serial printer, characterized in that a stop sensor is arranged behind a line where a feed roller and a medium come into contact when viewed from the direction in which the medium travels.