JPH0324364Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a paper guiding device in a printer.

[Technical background of the invention and its problems]

For example, most serial printers are equipped with a paper feed selection device that can supply various types of paper depending on the paper type, examples of which include an automatic paper feeder, a front inserter, and a continuous paper feed mechanism. These require not only replacing the paper feed selection device depending on the paper type, but also replacing the paper guide installed in the printer for guiding the paper.

Figures 1a and 1b are cross-sectional views showing differences in paper paths and paper guides in different paper feed selection devices, in which 1 is a platen, 2 is a print head, and 3A and 3B are paper sheets that guide the paper. guide, 4
A and 4B indicate paper, and 5 indicates a friction roller. Figure 1a shows a case where paper is fed from the front of platen 1 (left side in the drawing) using an automatic paper feeder or the like, and when paper 4A is wound around platen 1 and printing is performed, it is placed at the top of platen 1. It is more excreted. Therefore, the paper guide 3A is bent toward the platen 1 so as to guide the paper 4 along the outer periphery of the platen 1.

On the other hand, FIG. 1b shows a case where paper is fed from above the platen 1 using a front inserter, and
The upper part of the print head 2 of the paper guide 3B is bent toward the print head 2 so that the paper 4B can be easily fed from above the platen 1.

Figure 2a is a perspective view showing a paper guide for an automatic paper feeder, and Figure 2b is a perspective view showing a paper guide for a front inserter. You can find out that it is the opposite.

As described above, when printing using a serial printer, there is an inconvenience that two or more types of printer paper guides are required depending on the paper and paper feed selection device.

[Purpose of invention]

This invention was developed based on the above circumstances, and eliminates the need to prepare two types of printer paper guides depending on the paper and paper feed selection device, and eliminates the need for parts around the print head when replacing paper guides. It is an object of the present invention to provide a paper guide device for a printer that can eliminate the labor required for attachment and detachment.

[Summary of the idea]

The present invention provides a printer comprising a print head, a platen provided with an appropriate gap between the print head and the print head, and a paper guide installed between the print head and the platen to guide the paper. The paper guide is composed of a base body and a guide piece that is attached separately to the upper part of the base body. The feature is that the selection is made according to the following.

[Example of idea]

Hereinafter, the present invention will be explained based on an embodiment shown in FIGS. 3a and 3b and FIG. 4. In Fig. 3, a is a perspective view showing details of the paper guide when using an automatic paper feeder, b is a perspective view showing details of the paper guide when using a front inserter, and Fig. 4 is a paper sheet shown in Fig. 3a or Fig. 3b. FIG. 3 is a front view of the guide attached to the printer.

In FIGS. 3a and 3b, the paper guide 10A or 10B has a base 13 having a plurality of insertion holes 12 and 12' in the upright portion 11, and a base 13 having a plurality of insertion holes 12 and 12' from above the base 13, respectively. It consists of guide pieces 15 and 15' having pins 14 and 14' for insertion and fixation. The upper ends of the guide pieces 15, 15' are formed with curved surfaces 15a, 15'a in one direction,
The guide pieces 15, 15' can be inserted into the insertion holes 12, 12' of the base body 13 by turning them respectively by half a turn. Therefore, in the case of FIG.
In the case of FIG. b, the curved surfaces 15a and 15'a formed at the upper ends of the guide pieces 15 and 15' are positioned and fixed on the front side of the page.

In FIG. 4, 1 is a platen, 2 is a printing head provided with an appropriate gap from the printing surface of the platen 1, and a space between the platen 1 and the printing head 2 is for guiding paper 4A or 4B. The paper guide 10A or 10B is arranged therein. In the figure, when the paper guide 10A is attached, 4A is inserted from the bottom of the platen 1 using an automatic paper feeder or manual feeder, and is guided by friction rollers 5, 5 and wound.
After printing, the paper is ejected above the platen 1. When the paper guide 10B is installed, the paper 4B is fed from above the platen 1 using a front inserter, and after printing, it is ejected from above the platen 1 again. This is the paper to be ejected. The friction rollers 5, 5 are pressed against the platen 1 and are used to convey the sheet 4A inserted between the platen 1 and the platen 1.

Next, the operation of the present invention based on the above configuration will be explained. In FIG. 4, when using an automatic paper feeder, the paper guide 10A is provided with guide pieces 15, 15'.
The curved surfaces 15a and 15'a formed at the upper end are positioned on the platen 1 side shown by the solid line, and the base 13 is
Insert and fix the insertion holes 12, 12'. Therefore, by inserting the paper 4A from below the platen 1 in the direction shown by the arrow, the paper 4A is guided by the friction rollers 5, 5 and the paper guide 10A, and is wound around the platen 1.
can be discharged upwards.

Next, when using a front inserter,
The paper guide 10B has guide pieces 15, 15' attached to the base 1.
3, rotate it 180 degrees horizontally, insert it into the insertion holes 12, 12' of the base 13, and fix it. That is, the curved surfaces 15a, 13'a formed at the upper ends of the guide pieces 15, 15' are positioned on the side of the print head 2 shown by the dotted line. Therefore, by inserting the paper 4B from the top of the platen 1, the paper 4B can be guided and set between the paper guide 10B and the platen 1, and after printing, it can be discharged upward again.

Although the paper guide shown in the above embodiment has been described as an insertion type in which the guide piece is removably attached to the base body, the guide piece is not limited to this. The hinge mechanism rotates the guide piece to guide the paper along the arc of the platen when the front inserter is not used, and to guide the paper along the arc of the platen when the front inserter is used. A configuration may be adopted in which a guide piece is set to guide the guide between the platen and the base, and the same effect as described above can be obtained.

[Effect of idea]

As explained above, according to the present invention, in printers, conventionally it was necessary to prepare two or more types of paper guides to guide the paper feed path depending on the paper and paper feed selection device, but it is now possible to make do with one type. This has excellent effects such as eliminating the need to remove and attach parts around the print head when replacing the paper guide.

[Brief explanation of the drawing]

Figures 1a and 1b show a conventional paper guide device, and a is a side view when an automatic paper feeder or the like is used.
b is a side view when using a front inserter;
Figure 2a is a perspective view of the paper guide showing the main parts of Figure 1a, Figure 2b is a perspective view of the paper guide showing the main parts of Figure 1b, and Figures 3a and b are of the present invention. One embodiment is shown in which a is an exploded perspective view of a paper guide used in an automatic paper feeder, etc., b is an exploded perspective view of a paper guide used in a front inserter, and FIG. 4 is an exploded perspective view of a paper guide used in a printer. It is a side view showing a guide device. 1...Platen, 2...Print head, 4A, 4
B...Paper, 10A, 10B...Paper guide, 1
1... Standing part, 12, 12'... Insertion hole, 13
... Base, 14, 14'... Pin, 15, 15'...
...Guide piece, 15a, 15'a...Wave curved surface.

Claims (1)

[Scope of utility model registration request] A printer comprising a print head, a platen provided at an appropriate distance from the print head, and a paper guide installed between the print head and the platen to guide the paper. The guide is composed of a base body and a guide piece attached separately to the upper part of the base body, and an end of the guide piece guides the paper along the arc of the platen when the front inserter is not used;
A paper guiding device for a printer, wherein the front inserter is configured to guide the paper between the platen and the paper guide when the front inserter is used.