JPH0650201Y2 - Paper feeder for printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sheet feeding device for feeding a sheet to a feed port formed at the bottom of a printer in a backfeedable manner.

[Conventional technology]

Conventionally, various types of paper supply devices of this type have been put into practice. For example, there is one shown in FIG.

FIG. 6 is a block diagram showing a conventional device detachably attached to a printer.

The apparatus 1 takes in the paper from the lower side and supplies it to a supply port formed at the bottom of the printer 2, and has a taking-in section 4 for taking in the paper and the paper taken in the taking-in section 4. And a curved guide portion 5 for guiding the sheet to the supply port of the printer.

A pair of cursors 6 for guiding a cut sheet as a sheet according to its width are attached to the loading section 4 so as to be slidable from side to side.

This device 1 also has a function as a back feed.

That is, as shown in FIG. 7, when the printed sheet 7 is ejected from the supply port of the printer 2, the sheet 7 gradually changes its direction along the guide section 5 to reach the take-in section 4 and is taken. In the insertion portion 4, the cursor 6 is used to eject the paper horizontally and in a centered state.

[Problems to be solved by the invention]

However, in the apparatus having the above structure, as shown in FIG. 8, when the printed sheet 7 is back-fed from the guide section 5 to the intake section 4, the sheet 7 is placed between the cursor 6 and the intake section 4. There was a problem that paper jam occurred when it entered.

Further, as shown in FIG. 9, when the sheet 7 is skewed, there is a problem in that the sheet jam is generated by hitting the cursor 6.

Therefore, the present invention was made in view of the above-mentioned problems, and the purpose thereof is to prevent the occurrence of a paper jam even when the paper is back-fed, and to smoothly back-feed the paper to improve the performance. It is to provide a paper supply device for a printer.

[Means for solving problems]

In order to achieve this object, the present invention provides a take-in unit for taking in a paper, a guide unit for guiding the paper taken in the take-in unit to a supply port formed at the bottom of the printer, and the take-in unit. A sheet feeding device for a printer, which is slidably provided in the printer, has a pair of cursors for positioning according to the sheet width, and also has a function of back-feeding the printed sheet discharged from the supply port of the printer, On the capturing part side of the guide part, while having a top higher than the horizontal part of the cursor, and forming a convex part having a tapered surface inclined to the guide part and the capturing part side before and after this top part, It is characterized in that a concave portion having a constant length is formed on the inner surface of the rising portion starting from the end surface on the guide portion side.

[Action]

According to the present invention having such a configuration, when a printed sheet is discharged from the supply port of the printer, the sheet is guided by the tapered surface of the convex portion provided in the guide portion and does not enter under the cursor. , Smoothly back fed.

Also, even if the ejected paper has some skew,
The paper is back-fed without being caught by the cursor by the concave portion provided at the rising portion of the cursor.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the entire structure of a sheet feeding device according to an embodiment of the present invention, FIG. 2 is a sectional view showing details of a guide portion of FIG. 1, and FIG. 3 is a detailed view of a cursor of FIG. It is a perspective view shown.

In FIGS. 1 to 3, reference numeral 5 is a guide portion for gradually changing the direction of the sheet 7 taken in the taking-in section 4 and guiding it to a supply port formed at the bottom of the printer.

A convex portion 22 is formed on the take-in portion 4 side of the guide portion 5, and the convex portion 22 has a top portion higher than the horizontal portion of the cursor 6, and the guide portion 5 side and the take-in portion before and after the top portion. It has a structure in which inclined surfaces 11a and 11b are provided on the side of the section 4, respectively, and prevents the sheet 7 from entering under the cursor 6 when the sheet 7 is back fed. .

The cursor 6 is composed of the horizontal portion and the rising portion,
The back feed sheet 7 has a structure in which a rectangular concave portion 12 having a constant length starting from the end surface on the guide portion 5 side is formed in the rising portion, and tapered surfaces 12a and 12b are formed in the edge portion of the concave portion 12. Can be prevented from being caught on the cursor 6.

Reference numeral 8 is a leg receiving portion of the printer.

Next, the operation of the apparatus having the above configuration will be described with reference to FIGS.

When the back feed of the paper 7 is performed, first, the paper supply device 1 having the above-described configuration is attached to the bottom of the printer.

Next, when the printed sheet 7 is discharged from the supply port of the printer, the printed sheet 7 is guided by the tapered surface 11a of the convex portion 11 as shown in FIGS.
It is fed back to the intake part 4 without getting under.

Further, even when the printed paper 7 is skewed to some extent, the paper 7 is recessed and its tapered surfaces 12a and 12b.
To correct the skew, and the cursor 6 to eject in the centered state.

Further, as shown in FIG. 5, even if the tip of the printed paper 7 has a bend 7a within the range of B dimension, the paper 7 is smoothly fed back without entering under the cursor 6.

[Effect of device]

As described above, according to the present invention, the horizontal position of the cursor for positioning the paper according to the width of the paper is provided on the take-in side of the guide part for guiding the paper taken in the take-in part to the supply port formed at the bottom of the printer. A convex portion having a tapered portion which is inclined toward the guide portion side and the intake portion side is formed in front of and behind the top portion, and a constant starting from the guide portion side end surface on the inner surface of the rising portion of the cursor. Since the concave portion having the length is formed, the paper discharged from the supply port of the printer can be smoothly back-fed by the tapered surface of the convex portion and can be guided by the concave portion with some skew.

Therefore, according to this, when back feeding the paper,
The paper does not get under the cursor and the paper does not get caught by the cursor, so that it is possible to prevent the occurrence of a paper jam and improve the performance.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a sheet feeding device according to an embodiment of the present invention, FIG. 2 is a detailed sectional view showing an essential part of the device, and FIG. 3 is a detailed perspective view showing an essential part of the device. 4 is an explanatory view showing the operation of the apparatus, FIG. 5 is an explanatory view showing the operation of the apparatus, FIG. 6 is a configuration diagram showing a conventional apparatus, and FIG. 7 is a main part of the conventional apparatus. Detailed sectional view, FIG. 8 is an explanatory view showing a conventional problem, and FIG. 9 is an explanatory view showing another conventional problem. 1 ... Paper feeding device, 2 ... Printer, 4 ... Intake unit,
5 ... Guide part, 6 ... Cursor, 7 ... Paper, 11 ...
Convex part, 12 …… Concave part

Claims (1)

[Scope of utility model registration request] 1. A take-in section for taking in a sheet, a guide section for guiding the sheet taken in the take-in section to a supply port formed at the bottom of the printer, and a slidable section provided in the take-in section. A sheet feeding device of a printer having a pair of cursors for positioning according to the sheet width and having a function of back-feeding a printed sheet discharged from a supply port of the printer, wherein the guide part of the guide part is provided. On the side, a convex portion having a top portion higher than the horizontal portion of the cursor and having tapered surfaces inclined toward the guide portion and the intake portion side is formed in front of and behind the top portion, and the guide is provided on the inner surface of the rising portion of the cursor. A sheet feeding device for a printer, characterized in that a concave portion having a constant length is formed starting from the end face on the side of the portion.