JPH03120125A - Original paper feeder - Google Patents

Abstract

PURPOSE:To simplify the construction of a device and to improve operability by providing original receivers for receiving and mounting the end sides of an ejected original on the upper end portions of side regulating members on the upper face of an original tray. CONSTITUTION:When an operator moves a side regulating member 201a forward, a rack 211b at a left side is moved backward in response to the rotation of a pinion and a side regulating member 201b is according moved backward so that a width between both the side regulating members 201a and 201b is set to a large value. The upper faces of the side regulating members 201a and 201b serve as original receivers 202 and 202 for receiving and mounting the end portions of the ejected original thereon. Therefore, such a trouble as the ejected original entering other originals in an original tray 20 or the paper feed resistance of the original is not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document feeding device installed in a facsimile machine or the like.

■ Next Summer Techniques Figure 7 is a diagram showing a conventional example of a facsimile machine equipped with this type of document feeding device. The document feeding device is installed on the right side of the reading unit C provided at the top of the main body of the facsimile machine.

That is, a document tray 20 on which a large number of documents (not shown) are set is installed on the upper right side wall of the main body of the facsimile machine. The originals placed on the original tray 20 are fed out to the left side in the figure by a clockwise rotating paper feed roller 21, and then separated one by one by a separating section 40 disposed opposite to the paper feed roller 21, and the reading sensor 50 transported to the location.

The original whose image has been read by the reading sensor 50 is moved upward by the transport roller 54 and the ejection roller 55.
It is conveyed in a turn shape and is discharged onto a discharge tray 56 installed at the upper end of the reading unit (C).

However, the conventional example described above has the following drawbacks.

(2) The provision of the ejection tray 56 complicates and enlarges the structure around the reading unit 0, which becomes a bottleneck in making the device configuration more compact and reducing costs.

■In order to eject the original in a U-turn as described above,
The ejection tray 56 will be located above the document tray 20. Therefore, when setting the original on the original tray 20, the leading edge of the original is hidden by the output tray 56.
The operability (document centering operation) deteriorates significantly, and troubles such as jamming are likely to occur.

The present invention has been made in view of the current situation, and it is an object of the present invention to provide a document feeding device that has a simple structure and can significantly improve the operability during the document setting operation.

The present invention provides a document feeder that discharges a document set on a document tray in a U-turn shape upward after reading the document. The present invention is characterized in that a document holder is provided at the upper end of the side regulating member provided on the side regulating member to receive the leading edge side of the document after being ejected.

According to the above configuration, the document tray also serves as an ejection tray.

An embodiment of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a front sectional view showing the overall structure of a facsimile machine incorporating a document feeding device according to the present invention.

[Schematic configuration of facsimile machine]

First, the schematic structure of a facsimile machine will be explained with reference to FIG. This facsimile machine is roughly divided into four units: a paper feed unit (A), a recording unit (B), a reading unit (C), and an optional paper feed tray (D). Paper feed unit A is provided at the bottom of the main body of the facsimile machine, recording unit B and reading unit C are provided in this order above it, and optional paper feed tray D is installed on the right side wall of the main body corresponding to the right side of recording unit B. be done.

Paper feeding unit A feeds recording paper (not shown) on which received information is recorded to recording unit B during facsimile reception. Also, in the copy mode when this facsimile machine is used as a copying machine, the recording unit B is
feed the recording paper.

Such paper feeding unit) A is equipped at the bottom of the main body, and includes a paper feeding cassette 1 that stores a large number of recording papers, and a paper feeding unit that takes out the recording papers from the paper feeding cassette 1 one by one and feeds them to the recording unit B. It includes a roller 2 and a facsimile control board 3 installed above the paper feed cassette 1. Additionally, a handset 4 and an operation display section (
(not shown) is provided. The facsimile control board 3 is equipped with most of the equipment for the control system of this facsimile machine.

On the other hand, the recording unit 10B includes an imaging unit 10 that performs an electrophotographic image forming process, and a print head 11 that converts received information into laser light and exposes the photoreceptor drum 12 that constitutes the imaging unit IO. be done. The recording paper is supplied to the photosensitive drum 12 via a conveyance roller 6 and a timing roller 7. The conveyance roller 6 receives the recording paper fed from the paper feed roller 2 and supplies it to the timing roller 7 . Then, the timing roller 7 supplies recording paper to the photosensitive drum 12 in synchronization with the clockwise rotation of the photosensitive drum 12.

The recording paper supplied to the photoreceptor drum 12 and onto which the toner image has been transferred in a predetermined image forming process is separated from the photoreceptor drum 12 and conveyed to the position of the fixing roller 8 provided on the left side of the imaging unit 10. When the fixing process here is completed, the paper is discharged onto a discharge tray 13 provided above the print head 11 by a discharge roller 9.

In addition, a paper feed roller 5 is provided at a portion of the imaging unit 10 where the optional paper feed tray D is attached. The paper feed roller 5 takes out the recording sheets set in the optional paper feed tray D one by one, and supplies the taken out recording sheets to the photosensitive drum 12 via the conveyance roller 6 and the timing roller 7.

The optional paper feed tray D is provided to expand the paper feed capacity of this facsimile machine and to store recording paper of a different size from the paper feed cassette 1. It is also provided to enable manual paper feeding in copy mode.

The reading unit C consists of a close-contact type reading sensor 50 that reads the original image of the original DC (see FIG. 5) set on the original tray 20, and sends the read image data to a telephone (not shown) as an analog image signal. Send to line.

[Specific configuration of reading unit C 3 Next, the specific configuration of reading unit C will be described with reference to FIG. 2. At the lower right side of the reading unit C, there are many documents D.
A document tray 20 on which C is set is equipped. The set original DC is fed out to the left side by a paper feed roller 21 which is rotationally driven in the clockwise direction shown by arrow a, and then is separated one by one by a separating section 40 provided below the paper feed roller 21, It is conveyed to the position of the platen roller 51 provided on the downstream side corresponding to the upper left side.

Then, when the leading edge of the document DC is bitten by the platen roller 51, the document DC is thereafter transported by the platen roller 51. Note that a conveyance roller 53 is provided between the platen roller 51 and the paper feed roller 21 to convey a portion of the document DC located between them to the downstream side.

A contact type reading sensor 50 is provided above the platen roller 51 to read the original image of the original DC as an analog image signal. The image signal read by the reading sensor 50 is input to a binarization processing circuit (not shown) installed on the binarization board 52, converted into bright and dark binary image data, and then sent to the telephone line. be done.

Note that the reading timing of the reading sensor 50 is provided between the conveyance roller 53 and the platen roller 51,
It is controlled according to a detection signal from a leading edge detection switch Sl that detects the leading edge of the document DC.

The read original DC is then conveyed upward in a U-turn shape via the conveyance roller 54 and the discharge roller 55, and is discharged onto an upwardly sloped discharge surface 56 provided above the reading unit C. Document receivers 202 and 202, which will be described later, receive the leading end of the discharged document DC' (see FIG. 5). Note that a discharge detection switch S2 is provided between the conveyance roller 54 and the discharge roller 55.

[Detailed configuration of document tray]

Next, the detailed structure of the document tray 20 will be explained with reference to FIGS. 3 to 5. However, FIG. 3 is a plan view of the original unit C, FIG. 4 is a perspective view showing the side regulating members 201a and 201b provided on the upper surface side of the original tray 20 and their slide mechanism 210, and FIG. It is an arrow view.

As shown in the figure, a pair of front and rear side regulating members 201a and 201b are provided on the upper surface side of the document tray 20.

The side regulating members 201a and 201b have a U-shaped cross section. The side regulating members 201a and 201b are slidable in the front and rear directions, and are adjusted to a length corresponding to the width of the document DC set on the document tray 20 to prevent skew.

The sliding movement of the side regulating members 201a and 201b is performed by a sliding mechanism 210 consisting of a rack and pinion mechanism. That is, as shown in FIG. 4, a rack 2 corresponding to the right side in the figure is provided on the lower surface of the front side regulating member 201a.
11a are connected, and on the other hand, the side regulating member 201b
A rack 211b corresponding to the left side in the figure is connected to the lower surface side of the rack. The racks 211a and 211b are long in the front-rear direction, and a suitable gap is formed between them, and a pinion 212 that meshes with both the racks 211a and 211b is provided in this gap so as to be rotatable around a vertical axis.

Thus, when the operator moves, for example, the front side regulating member 201a forward, the pinion 212 rotates in the direction already indicated by the arrow, and accordingly, the left rack 211
b is moved rearward, side regulating member 201b is moved rearward, and the widths of both side regulating members 201a, 201b are set to be large.

The upper surfaces of the side regulating members 201a and 201b are
It is a document receiver 202.202 that receives the leading edge of C'. In this way, when the document DC is discharged above the reading unit C in a U-turn shape, the document receivers 202 and 202
receives the leading end of the discharged original DC', and the discharge surface 56 receives the rear end of the discharged original DC'. Therefore, as shown in FIG.
There is no problem of the original DC being mixed into the original DC, and no paper feeding resistance of the original DC occurs.

Figure 6 is a diagram showing a modification of the present invention, in which a receiving guide wall 203 is provided on the side of the original document receiver 202, 202 and slopes upwardly toward the outside. .203 is provided, thereby smoothly positioning the ejected document DC' to be received on the document receivers 202, 202 in the front-rear direction, thereby improving the receiving performance of the document receivers 202, 202.

Further, when such receiving guide walls 203, 203 are provided, the operator can grasp this portion, so that the operability of the side regulating members 201a, 201b can be improved.

In each of the above embodiments, the present invention is applied to a facsimile machine, but the present invention can be similarly applied to a document feeder of other image forming apparatuses such as printers.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention described above, the document tray also serves as an ejection tray, so that the apparatus configuration can be significantly simplified compared to the conventional example described above. Therefore, significant cost reduction is possible.

Furthermore, since the ejection tray is not required, visibility from above of the document tray can be improved.

Therefore, since the originals set on the original tray can be reliably visually recognized, there is an advantage that the operability during the original centing operation can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a front cross-sectional view showing the overall configuration of a facsimile machine equipped with a document feeding device according to the present invention, FIG. 2 is a front cross-sectional view showing an enlarged reading unit, and FIG. 3 is a plan view of the document unit. , FIG. 4 is a perspective view showing the side regulating member provided on the upper surface side of the document tray and its sliding mechanism, FIG. 5 is a view in the X direction, and FIG. FIG. FIG. 7 is a front sectional view showing a conventional example. 20... Document tray, 56... Ejection surface, 201a,
201b...Side regulation member, 202.202...
Document holder, 210...Slide mechanism, 211a, 21
1b...Rank, 212...Binion, DC source original, DC'...Discharged original.

Claims (1)

[Claims] (1) After reading the original set in the original tray,
In a document feeder that discharges documents upward in a U-turn shape, the leading edge of the discharged document is received at the upper end of a side regulating member provided on the top side of the document tray so as to be slidable in the width direction. A document feeding device characterized by being provided with a document tray.