JPS5889536A - Automatic paper feeder - Google Patents

Abstract

PURPOSE:To perform a manual paper feed with simple operation, by automatically moving a separator plate holder to a position in which a separator plate is detached by a required distance at the manual paper feed. CONSTITUTION:An engaging part 5c of a separator plate holder 5 is engaged to a lower step face 13b in a cam part 13a of a slide plate 13, and a separator plate 4 is placed in a forcibly contacted condition to a separator roller 3 to separably feed a document sheet by sheet by the roller 3 and the plate 4. Then at a manual paper feed, a control switch 18 is pressed to move the slide plate 13 against a tensile coil spring 14 in the direction of an arrow head L, and the holder 5 is placed in an engaged condition to a higher step face 13c and swingably displaced around a supporting shaft 6 as the center in the direction of an arrow head D against a compression coil spring 12. In this way, the separator plate 4 can be separated from the roller 3 by a required distance for the manual paper feed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic paper feeding device for automatically feeding documents in facsimiles, copying machines, and the like.

Conventionally, automatic paper feeding devices include, for example, a separation roller that is rotationally driven in the document feeding direction and a separation plate that presses into contact with the circumferential surface of the separation roller, and is used to separate the plurality of inserted documents. There is a device in which a separation plate applies a brake to documents other than the documents that come into contact with the roller, so that only the documents that come into contact with the separation roller are separated and fed one by one.

In such an automatic paper feeder, when manually feeding non-standard originals, such as smaller originals, thicker or thinner originals than the standard originals, either alone or using a carrier sheet, a separation plate is used. If the paper is in pressure contact with the separation roller, it may not be possible to feed the paper, or even if the paper can be fed, the original or the separation plate may be deformed.

Therefore, in the past, the paper had to be manually fed by opening it upward by hand, just like when cleaning the separator plate or removing all the jammed paper. There is a problem in that touching the separation roller or separation roller with a hand may deform it or change its coefficient of friction, and as a result, a paper feeding error may occur.

This invention has been made in view of the above points, and an object of the present invention is to enable manual paper feeding with one simple operation in a self-control paper feeding device without adversely affecting the paper feeding capacity. shall be.

Therefore, in the automatic paper feeder according to the present invention, the separation plate is held by a displaceable separation plate holder, and when the separation plate is manually fed, the separation plate is moved to a position where the separation plate is separated from the separation roller by the required amount for manual paper feeding. A separation plate holder moving means for automatically moving the holder is provided.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 are a schematic configuration diagram showing an embodiment of the present invention, and a schematic diagram of main parts of FIG. 1 viewed from the direction of arrow A. FIG.

In these figures, below the document table 1, in order from the document insertion slot side (not shown), a feed roller 2 and a separation roller 6, each having a partially flat portion, are installed in an opening 1a formed in the document table 1, respectively. and 1b so as to protrude intermittently or constantly during rotation.

The feed roller 2 and separation roller 3 are rotationally driven in the direction of arrow P, which is the document feeding direction, by a single drive motor (not shown).

Above the separation roller 3, a separation plate holder 5 to which the separation plate 4 is fixed is fixed at its rear end to the tip of a support plate 7 which is pivotally connected to a device fixing part (not shown) by a support shaft 6. It is arranged so that it can be oscillated.

This separation plate holder 5 has a fixing plate 10 fixed to a fixing pin 8.9, and an adjusting pin 11 inserted into an opening 10a of the fixing plate 10 and fitted into an upper plate part 5a and a lower plate part 5b in the radial direction. Compression coil spring 1 interposed between the protruding pin 11a
2 imparts a rotational behavior in the direction toward the separation roller 6, thereby bringing the separation plate 4 into pressure contact with the separation roller 3.

In addition, the engaging portion 5c, which is a part of this separation plate holder 5,
As shown in FIG. 2, a cam portion l forming a two-stage cam surface of a slide plate 16 slidably attached to fixing pins 8 and 9.
3 aK is engaged.

Note that the level difference between the low step surface 13b and the high step surface 13c of the cam portion 13a of the slide plate 13 is formed to an amount that allows the separation plate 4 to be separated from the separation roller 6 by the necessary distance for manual paper feeding. ing.

This slide plate 13 has a tension coil spring 14 attached between its one end and a fixed part, and is given the habit of moving in the direction of arrow R, and the other end is rotated by a support shaft 16 via a connector 15. It is connected to one end of a rotary link 17 that is freely supported.

The other end of the rotary link 17 is connected to an operating rod 19a of a solenoid 19 that is activated when the operating switch 18 is pressed.

These coil springs 12. Slide plate 161 rotating link 17. Operation switch 18. The solenoid 19 and the like constitute a separating plate holder moving means.

Next, the operation of the embodiment configured as described above will be explained.

First, during automatic paper feeding, the slide plate 16 is in the state shown in FIG. 2, and the engaging portion 5C of the separation plate holder 5 is engaged with the low step surface 13b of the cam portion 13a.

As a result, the separation plate 4 comes into pressure contact with the separation roller 3, and the separation roller 3 and the separation plate 4-4 separate the documents fed by the feed roller 2 one by one and send them out.

Next, when manually feeding paper, press the operation switch 18.
By pressing , the solenoid 19 is activated, and its operating rod 19a moves in the direction of arrow C to move the rotary link 17 to the second position.
In the figure, the slide plate 13 is rotated to the left and moves in the direction of the arrow against the tensile force of the tension coil spring 14.

As a result, the separation plate holder 5 is brought into a state in which its engaging portion 5c is engaged with the high step surface 13c of the cam portion 13a of the slide plate 13, that is, moved to the position shown by the phantom line in FIG. , pivots around the support shaft 6 in the direction of the arrow (against the restoring force of the compression coil spring 12).

As the separation plate holder 5 moves, the separation plate 4 moves away from the separation roller 5 by the amount necessary for manual paper feeding and moves to the position shown by the phantom line in FIG.

As a result, a gap necessary for manual paper feeding is formed between the separating roller 3 and the separating plate 4, so that non-standard originals can be manually fed.

At this time, the separation plate 4 is only separated from the separation roller 3 by the amount necessary for manual paper feeding, so if your hand touches the separation roller 6 or the separation plate 4 during manual paper feeding, it may deform or reduce the coefficient of friction. There will be nothing to change.

When returning to automatic paper feeding, the operation switch 18 is turned off and the solenoid 19 is deactivated, so that the slide plate 16 is activated by the tension coil spring 14.
It moves in the direction of arrow R by the tensile force of , returns to the state shown in FIG. 2, and automatically returns to the above-mentioned automatic paper feeding state.

In this way, by operating the operation switch 18f, it is possible to automatically switch between automatic paper feeding and manual paper feeding.

It goes without saying that the configurations of the separation plate holder and the separation plate holder moving means are not limited to those of the above embodiments.

As described above, according to the present invention, manual paper feeding can be performed in an automatic paper feeding apparatus with a simple operation without adversely affecting the paper feeding capacity.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, and FIG.
The figure is a schematic view of the main parts of FIG. 1 viewed from the direction of arrow A. 1... Original table 2... Feed roller 3.
... Separation roller 4 ... Separation plate 5 ... Separation plate holder 7 ... Support plate 11 ... Adjustment pin 12.
・Compression coil spring 13...Slide plate 17...Rotary link 18...Operation switch 19...Solenoid applicant Rico Co., Ltd. -

Claims (1)

[Claims] 1. In an automatic paper feeder equipped with a separation roller that is rotationally driven in the document feeding direction and a separation plate that presses into contact with the circumferential surface of the separation roller, a displaceable separation plate holder that holds the separation plate; An automatic paper feeder comprising a separation plate holder moving means for moving the separation plate holder to a position where the separation plate is separated from the separation roller by a required amount for manual paper feeding during manual paper feeding.