JPH04239681A - Printer - Google Patents

Abstract

PURPOSE:To prevent printing where printing paper does not exist by providing a sensor which detects the right end of printing paper to detect the width of the printing paper. CONSTITUTION:Printing paper 3 is positioned by making its left side abut against a fixing guide 2 to be inserted into a paper inserting stand. At that time a carriage 7 of a printing part 4 is guided by fixing shafts 5, 6 to be moved in the arrow B direction. A sensor 11 is moved in the arrow B direction by this movement and detects whether paper exists or not on the paper inserting stand 1. When the paper exists and the sensor 11 passes a right end of the printing paper from left to right, its output signal varies. Therefore, the sensor 11 detects the right end of the printing paper i.e., the width of the printing paper 3. An output signal of the sensor 11 is inputted to a control part. The control part judges whether the printing data is a quantity exceeding the width of the printing paper 3 or not from this input signal, and the printing data exceeding the width of the printing paper 3 is made to be printed in a next line.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention involves inserting printing paper while keeping the left side of the printing paper in contact with a fixed guide, and performing a printing operation while reciprocating in a direction perpendicular to the direction in which the printing paper travels. Regarding printing devices.

0002

2. Description of the Related Art A conventional printing device inserts printing paper while keeping its left side in contact with a fixed guide, and prints while reciprocating in a direction perpendicular to the direction in which the printing paper travels. A fixed guide that guides the insertion of the printing paper by abutting the left side of the printing paper, and a printing section that performs a printing operation while reciprocating in a direction perpendicular to the direction of travel of the printing paper. However, it is usually not equipped with a sensor specifically for detecting the right edge of printing paper.

0003

[Problems to be Solved by the Invention] When the conventional printing device described above is given an amount of print data that exceeds the width of the inserted printing paper, it performs a printing operation where no printing paper exists. This method has the disadvantage that not only the printed data of a portion is not left on the printing paper, but also the printing hammer that performs printing and the platen that holds the printing paper during the printing operation are damaged.

0004

[Means for Solving the Problems] The printing device of the present invention includes a fixed guide that guides the insertion of the printing paper by abutting the left side of the printing paper, and a direction perpendicular to the traveling direction of the printing paper. The printing device includes a printing unit that performs a printing operation while performing a reciprocating motion, and is provided with a sensor that is mounted on the printing unit and detects the right end of the printing paper.

[0005]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention.

In FIG. 1, a paper insertion table 1 includes a fixed guide 2 fixed at the left end to guide the insertion of printing paper 3, and a platen 10 fixed at the front end and serving as a cradle during printing. The printing paper 3 has a fixed guide 2.
By bringing the left side of the sheet into contact with the sheet, positioning is performed when inserting the sheet into the sheet insertion table 1. The printing section 4 prints the printing paper 3
direction (arrow B) perpendicular to the direction of travel (arrow A direction)
a carriage 7 that reciprocates from side to side using two fixed shafts 5 and 6 arranged in the direction) as guides;
The printing hammer 9 is mounted on the printer and performs a printing operation on the platen 10 via the ink ribbon 8. The carriage 7 is also equipped with a sensor (for example, a reflective photo sensor) 11 for detecting the presence or absence of the printing paper 3 at a position facing the printing surface of the printing paper 3, and as the carriage 7 moves, the paper is inserted. It is detected whether printing paper 3 is present on table 1 or not.

Next, the operation of the printing apparatus constructed as described above will be explained.

The printing paper 3 is positioned by bringing its left side into contact with the fixed guide 2, and then inserted into the paper insertion table 1.
Insert into. At this time, the carriage 7 of the printing section 4 moves in the direction of arrow B guided by the fixed shafts 5 and 6. Due to this movement of the carriage 7, the sensor 11 moves in the direction of arrow B, and detects whether or not the printing paper 3 is present on the paper insertion table 1. A printing paper 3 is present in the paper insertion table 1, and when the sensor 11 passes the right edge of the printing paper 3 from left to right, its output signal changes. Can be detected.

The output signal of the sensor 11 is input to a control unit (not shown), and the control unit determines from this input signal whether or not the amount of print data exceeds the width of the print paper 3. Print data exceeding the width is printed on the next line. In some cases, the host device is notified of this without printing that amount.

[0011]

Effects of the Invention As explained above, the printing device of the present invention has a sensor for detecting the right edge of the printing paper in the printing section and detects the width of the printing paper inserted into the paper insertion table. This has the effect of preventing printing operations from occurring where there is no printing paper when an amount of print data that exceeds the width of the paper is given. This has the effect of preventing data from remaining on the printing paper and also preventing damage to the printing hammer and platen.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention.

[Explanation of symbols]

1 Paper insertion stand 2 Fixed guide 3 Printing paper 4 Printing section 5 Fixed axis 6 Fixed axis 7 Carriage 8 Ink ribbon 9 Printing hammer 10 Platen 11 Sensor

Claims (1)

[Claims] 1. A fixed guide that guides the insertion of the printing paper by abutting the left side of the printing paper, and a printing machine that performs a printing operation while reciprocating in a direction perpendicular to the direction of travel of the printing paper. What is claimed is: 1. A printing device comprising: a sensor for detecting the right edge of the printing paper, the sensor being mounted on the printing section;