KR940002184Y1 - Automatic paper supply device for fax - Google Patents

Abstract

No content.

Description

Original Automatic Document Feeder

1 is a configuration diagram of a conventional paper feeder.

2 is an exploded perspective view of a paper feeder of the present invention.

3 is a configuration in which the paper feeding device of the present invention is bound.

* Explanation of symbols for main parts of the drawings

1: Main frame 2: Feed roller

3: Front frame 4: Feeding spring

4, 4 ': leaf spring 5: feeding rubber

6: plate 7: screw

8: Original

The present invention is directed to the automatic document feeder of the copying transmitter, and in particular, it is improved to separate and feed the originals one by one using friction rubber.

In the paper feeding apparatus for feeding originals from the copying transmitter, a paper feeding apparatus as shown in Fig. 1 was conventionally used.

The plate spring 15 and the feed rubber 16, the ends of which are gently bent upward on one side of the lower side of the pressing plate 14 installed on the front frame 13 of the upper feed roller 12, which are slightly protruded from the main frame 11, The plate 17 is fixed with the screw 18 so that the pressing plate 14 is separately contacted with the other side of the front frame 13 so that the free end of the feed rubber 16 is in surface contact with the feed roller 12 within a predetermined angle range. The bottom of the installed end of the leaf spring 19 is bent upwards to the bottom of the pressing plate 14 is installed to apply pressure to the other upper portion.

The contact of the document is made by such a contact, which will be described in more detail. When a plurality of originals placed on the main frame 11 reach the position of the separation unit, a not shown detector detects this and feeds the feed roller 12 accordingly. ) Is driven, and only the original located at the bottom of the original is sent out.

At this time, the front end portion of the original paper has a frictional force that is increased by the length of the original paper contacting contact with the paper feed roller 12 after passing through the initial contact position to the leaf spring 15 fixed to the pressing plate 14, so that the paper is fed out.

In addition, the upper surface of the document paper that has passed through the separation unit does not contact the paper feed roller 12 is in contact with the paper feeder 16, so that the feeding roller 12 has a larger friction force than the paper feeder 16, and a plurality of sheets Only one sheet is fed at a time, without a single sheet or single sheet, and the front end surface of the next original is slightly pressured by the curved portion of the end of the leaf spring 15 to prevent duplication.

However, this paper feeder is installed at the bottom of the presser plate to prevent the overlapping of paper, and the paper feeder assembled by screwing using paper feed rubber and plate is complicated in structure and presser plate to give friction to paper feeder and feed roller. Since the pressing position is different according to the assembly error of the two assemblies by installing a separate leaf spring on the upper part, the distribution of pressing force for automatic feeding appears differently, so there is a problem that the originals are not fed one by one. .

The present invention was devised to solve the above problems, by simplifying the structure by integrating a spring for pressing the paper feed lever in close contact with the paper feed roller and a spring to prevent duplicate transfer of the document to the document feeder. The purpose of the present invention is to improve the reliability of the device by obtaining the required spring force so that the originals can be fed one by one sequentially.

An embodiment for achieving the above object will be described in detail with reference to the accompanying drawings.

Referring to the configuration of the present invention with reference to Figures 2 and 3 installed in the main frame (1) slightly crushed; The center upper portion of the feed spring (4) installed in the front frame (3) of the upper feed roller (2) is assembled to the bottom by forming a leaf spring (4 ') so that one side is inclined downward and the end is bent upwards In order to press the feeding rubber 5 and the lower side integrated with the feeding spring 4, the leaf springs 4 "formed on both sides are inclined upward, so that both bottom surfaces of which the ends are bent upward can press on the document 8 Forming the feed spring (4) and the feeding rubber (5) and the plate (6) assembled at the lower end fixed to the front frame (3) so that the screw (7) is also fixed to the feed roller (2) (5) is installed in close contact with pressure.

Effects of the present invention configured as described above are as follows.

When the original is set on the mainframe 1 mounted on the replica transmitter, the original 8 reaches the position of the separation unit and is detected by a detection device (not shown), and the feed roller 2 is driven accordingly. Only the originals (8) located at will be sent out. At this time, the front end of the originals (8) will first come into contact with both ends of the leaf spring (4 ") at the bottom of the feed spring (4) installed on the front frame (3), and then come to the separating part. Therefore, the frictional force with the surface of the paper feed roller 2 is increased.

In the above state, the surface of the paper feed roller 2 is conveyed by the friction force, and the original 8 is supported by pressing the original 8 by the leaf spring 4 'at the top of the paper spring 4. Since the length of the document 8 that is conveyed by the frictional force of the paper feeder 5 and the paper feed roller 2 and is in contact with the paper feed roller 2 is increased, the frictional force is increased, so that only the original 8 at the bottom is fed out. At this time, since the feeding rubber 5 is pressed by the upper leaf spring 4 ', the friction force in the reverse direction is generated, and the original is more stably sent out.

When the lowermost original is sent, the remaining originals 8 are controlled by the feed springs 4 " on both sides of the leaf springs 4 ". In this state, when the first originals are sent out, the feed rollers 2 By idling, the manuscript, which has been removed by the two leaf springs 4 ", is fed for the next delivery.

According to the present invention as described above, by simplifying the structure by integrating the feed spring without using the presser plate and the separate leaf spring, the cost is reduced and the original spring is sent out by obtaining the exact spring force required for feeding the document, thereby avoiding duplicate transfer. This can be done and the reliability of the device can be improved.

Claims (1)

In the automatic document feeder of the copying transmitter, one end is inclined downward and the upper end of the feed spring 4 installed in the front frame 3 above the feed roller 2 protruding slightly from the main frame 1. The leaf spring 4 'is formed to be bent upward so that the feed rubber 5 assembled at the lower end can be pressed, and the lower side integrated with the feed spring 4 is formed on both sides of the leaf spring 4'. ) Is bent upwards, and both bottom surfaces of which the ends are bent upward are formed to press the document 8, thereby fixing the feed rubber 5 and the plate 6 assembled to the feed spring 4 and the lower end, and the screw 7 is also fixed. It is fixed to the front frame (3) so that the paper feed roller (2) on top of the paper feed roller (5), the automatic copying device of the copying machine, characterized in that installed in close contact.