KR19990031609U - Automatic Paper Feeding Device of Office Automation Machine - Google Patents

Abstract

The present invention provides a pickup roller (2) for transporting the paper (P) stored in the paper cassette (1), the idle roller (3) on both sides of the pickup roller (2) made of a slightly smaller width than the pickup roller (2) Separation finger (6) for separating and transporting the paper (P) in a sheet while contacting the pick-up roller (2) at a predetermined pressure by the elasticity of the finger spring (4) and the finger lever spring (5) In addition to extending the guide portion (6a) of the separation finger (6) to form a paper separation prevention piece (6b) so that the paper (P) does not leave the guide portion to affect any ambient temperature and humidity conditions It relates to an automatic paper feeder of an office automation machine that prevents curling of paper that is fed without being fed.

Description

Automatic Paper Feeding Device of Office Automation Machine

The present invention relates to office automation equipment such as printers, copiers, faxes, etc., which uses plain paper. More specifically, the automatic paper feeding apparatus of the office automation equipment which prevents curling of papers to be fed in a single sheet accurately. It is about.

In general, office automation equipment such as printers and facsimiles are provided with an automatic sheet feeder (Auto Sheet Feeder) for loading paper and automatically feeding the sheets one by one.

An example of such an automatic paper feeding device is a pickup roller 2 for conveying the paper P stored in the paper cassette 1 while being rotated in one direction by a drive source of a driving motor (not shown), as shown in FIG. Picking up by the elasticity of the idler roller (3) and the finger spring (4) and the finger lever spring (5), which are positioned at both sides of the pickup roller (2) at a predetermined distance and have a width slightly smaller than that of the pickup roller (2). It consists of a separating finger 6 which separates and selects and feeds the paper P into sheets while contacting the roller 2 at a predetermined pressure.

The paper cassette 1 is provided with a paper feeding plate 7 on which paper P is loaded, and a knock-up spring 8 for elastically supporting the paper feeding plate 7 upward in the lower portion of the paper plate 7. ) Is installed.

According to the conventional automatic paper feeder configured as described above, the pick-up roller 2 has the separation finger 6 interposed between the pick-up rollers 2 by the elasticity of the knock-up spring 8 that supports the paper feeding plate 7 upward. The pick-up roller 2 is rotated while maintaining the contact state with the separating finger 6 by conveying the sheet of paper P one by one at a predetermined pressure.

At this time, the idle roller 3 serves to hold both sides of the paper (P) to be conveyed while rotating integrally with the pickup roller (2).

This pickup operation of the paper is repeatedly performed by the rotation of the pickup roller 2.

In the automatic paper feeder according to the prior art as described above, a portion of the paper is fed over the upper side of the guide portion 6a of the separating finger 6 as shown in FIG. There is a problem that a failure that does not support.

In particular, when there is too much or too little moisture, curling occurs frequently, resulting in a misfeeding of two or more sheets of paper at once.

The object of the present invention devised in view of such a problem is to prevent the defect that the paper is not fed properly because the paper is to lift the separation finger.

1 is a cross-sectional view showing the configuration of an automatic sheet feeder according to the prior art.

Figure 2 is a front view of the separating finger according to the prior art.

3 is a cross-sectional view showing the configuration of an automatic sheet feeding apparatus according to the present invention.

Figure 4 is a front view of the separation finger according to the present invention.

(Explanation of symbols for the main parts of the drawing)

One ; Paper cassette 2; Pick up roller

3; Idle roller 4; Finger spring

5; Finger lever spring 6; Detach finger

6a; Separation finger guide 6b; Paper separation prevention

7; Knock up plate 8; Knock-up spring

The automatic paper feeding device of the office automation device of the present invention for achieving the above object is a pickup roller for transporting paper, an idle roller positioned at a predetermined distance on both sides of the pickup roller, and having a width smaller than that of the pickup roller, In the automatic paper feeder of the office automation machine comprising a separating finger for separating and conveying the sheet into sheets while contacting the pickup roller at a predetermined pressure by the elasticity of the finger spring and the finger lever spring,

It characterized in that the sheet is provided with a paper separation prevention piece that the guide portion of the separation finger is extended so that the paper is not separated from the guide portion.

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

Accompanying drawings Figure 3 is a cross-sectional view showing the configuration of the automatic sheet feeder according to the present invention, Figure 4 is a front view of the separation finger according to the present invention.

As shown in the drawing, an embodiment of the present invention includes a pickup roller 2 for transferring the paper P stored in the paper cassette 1, and a pickup roller 2 positioned at a predetermined distance on both sides of the pickup roller 2, The paper P is cut into pieces while contacting the pick-up roller 2 at a predetermined pressure by the elasticity of the idle roller 3 and the finger spring 4 and the finger lever spring 5, each of which is slightly smaller than the width 2). The configuration of the separation finger 6 to separate and select and transfer is the same as in the prior art.

Here, the guide portion 6a of the separating finger 6 is extended to form the paper release preventing piece 6b so that the paper P does not leave the guide portion.

The sheet is prevented from being separated from the guide portion 6a of the separating finger 6 at the time of feeding the sheet P by the sheet release preventing piece 6b.

As described above, the automatic paper feeder of the office automation device according to the present invention extends a paper release prevention piece that prevents the paper from falling off at the guide of the separating finger that separates the paper into sheets at the time of feeding the paper. And it is effective to prevent the curl phenomenon of the paper to be fed without being affected by the humidity conditions.

Claims (1)

Pick-up rollers for transporting paper, idle rollers positioned at a predetermined distance on both sides of the pick-up rollers and having a width slightly smaller than the pick-up rollers, and contact with the pick-up rollers at a predetermined pressure by the elasticity of the finger springs and finger lever springs. In the automatic paper feeder of an office automation machine comprising a separating finger for separating and conveying a sheet of paper, And a paper release prevention piece having a guide part of the separating finger extended to prevent the paper from being separated from the guide part.