JPH0414787B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in image forming apparatuses such as copying machines and printers, and in particular, a manual paper feed section and an automatic paper feed section are integrated and movable to the outside of the image forming apparatus main body. The invention relates to an image forming apparatus installed in a.

In conventional image forming apparatuses, when a recording paper jam occurs, the front side wall of the image forming apparatus main body (the side wall having a plane perpendicular to the photoreceptor axis)
He opened it and removed the jammed recording paper.

However, since the recording paper moves in a direction perpendicular to the axis of the photoreceptor, when a paper jam occurs, the recording paper wrinkles so that a ridge line is formed in the same direction as the axis of the photoreceptor. Therefore, as described above, even if you open the front side wall and try to remove the recording paper, the ridgeline portion may get stuck and it may not be possible to remove it properly.

The present invention has been made in view of these difficulties.
A structure including an automatic paper feed section, a manual paper feed section, a first paper feed guide, and a second paper feed guide is movable to the outside of the image forming apparatus main body in a direction perpendicular to the axis of the photoreceptor. The first sheet feeding guide and the second sheet feeding guide are swingably supported by the structure.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, an electronic copying machine in which the present invention is implemented will be described below with reference to the drawings.
FIG. 1 is a front sectional view showing a state in which an integrated manual paper feed section 1 and an automatic paper feed section 2 are installed in a copying machine main body 3 as an image forming apparatus main body.
The figure is a front sectional view showing a state in which they are pulled out in the direction of arrow A. 4 is a photoreceptor drum as a photoreceptor provided approximately in the center of the copying machine main body 3;
A photoconductive material such as selenium is coated on the circumferential surface. Reference numeral 5 denotes a document table provided on the top surface of the copying machine main body 1, and is made of a transparent glass plate. 6
is a soft document table cover provided on the document table 5 so as to be openable and closable. Reference numeral 7 denotes a short focus lens array fixed above the top of the photoreceptor drum 4, and an exposure lamp 8 for exposing the document table is fixed to the side thereof. Reference numeral 9 denotes a charging corotron provided to the left of the short focus lens array 7. 10 is a developing device for developing an electrostatic latent image with toner, and a magnet roller 11 is installed inside the developing device. 12 is a transfer corotron for transferring a toner image onto copy paper 13 as a recording paper; 14 is a separation corotron for peeling off the copy paper 13 onto which the toner image has been transferred from the photoreceptor drum 4. A cleaning device 15 removes toner remaining on the photoreceptor drum 4 that has not been completely transferred, and includes a blade 16 for stripping off the residual toner and a roller 18 for conveying the stripped toner to a storage container 17.
Reference numeral 19 denotes a static elimination lamp that eliminates residual charges on the photosensitive drum 4. 20 and 20 are feed rollers for manual paper feeding provided in the manual paper feeding section 1, and 21 and 22 are fixed guide plates for guiding the copy paper 13. 23 and 24 are fixed guide plates 21 and 2
The movable guide plate is provided on the downstream side of 2 and is rotatable clockwise around support shafts 23' and 24', respectively. 23″ and 24″ are respective guide plates 2
3.24 stopper. Register rollers 25 and 25 are located downstream of the movable guide plates 23 and 24, and are used to re-feed the copy paper 13 fed by the feed rollers 20 and 20 to the transfer section in a timely manner. Reference numeral 26' denotes a movable guide plate provided on the downstream side of the register rollers 25, 25, and is provided so as to be rotatable clockwise about the support shaft 26 as a fulcrum. Copy paper 13 is provided in the automatic paper feed section 2.
A paper feed cassette 27 loaded with paper is removably attached. 28 passes the copy paper 13 through a through hole 27' provided at the bottom of the paper feed cassette 27.
The upper arm presses against the feed roller 29 for automatic paper feeding, and is urged to rotate clockwise by a tension spring 30 provided at the bottom. Reference numerals 31 and 32 are fixed guide plates provided upstream and downstream of the register rollers 25 and 25, respectively. Reference numeral 33 denotes a vacuum conveyor provided downstream of the separating corotron 14, which conveys the copy paper 13 onto which the toner image has been transferred to the fixing rollers 34, 34. 35 is a vacuum unit that supports the vacuum conveyor 33. The manual paper feed section 1, automatic paper feed section 2, and vacuum unit 35 are integrally constructed and fixed on a slider 36 that is slidably mounted on the inner bottom of the copying machine main body 3. 37, 37
A discharge roller discharges the copy paper 13 on which the toner has been heated and fixed by the fixing rollers 34, 34 to the outside of the copying machine main body 3. Reference numeral 38 denotes a lock lever provided on the manual paper feed section 1, and its upright portion engages with an engagement hole 3' provided in the main body 3 of the copying machine. 3
Reference numeral 9 denotes an operating lever whose one end projects outside the copying machine main body 3, and the other end and the lock lever 38 are connected by a connecting lever 40. The lock lever 38 and the operating lever 39 are rotatably supported on support shafts 38' and 39' fixed to the main body 3 of the copying machine, respectively. Further, the operating lever 39 is biased clockwise by a tension spring 41.

Next, a method for dealing with a paper jam in the copy paper 13 will be explained. First, the operating lever 3
9 is pushed up in the direction of arrow B against the tension spring 41. Then, the actuation lever 39 rotates counterclockwise about the support shaft 39', and the lock lever 38, which is connected to this actuation lever 39 via the connecting lever 40, also rotates counterclockwise about the support shaft 38'. . Therefore, the upright portion of the lock lever 38 is disengaged from the engagement hole 3'. In this state, if you pull out the paper feed section to the right, the manual paper feed section 1, automatic paper feed section 2, and vacuum unit 35 will be removed.
moves to the right together with the slider 36, and is pulled out of the copying machine main body 3 as shown in FIG. If a paper jam occurs between the manual paper feed section 1 and the register rollers 25, 25, the jammed copy paper 13 can be removed from above by rotating the movable guide 23 in the direction of arrow C. I can do it. Similarly, if a paper jam occurs between the automatic paper feed section 2 and the register rollers 25, 25, the movable guide 23 and other movable guides 2
4, and register roller 2.
If a paper jam occurs between the transfer corotron 12 and the transfer corotron 12, the movable guide 26 may be rotated.

After removing the jammed copying paper 13 in this way, if the paper feed section is pushed into the copying machine main body 3, the upright part of the lock lever 38 and the engagement hole 3'
are engaged again by the tension of the tension spring 41.

Although the electronic copying machine in which the present invention is implemented has been described in detail above, the present invention can be applied to other devices as well.
It can be applied to various image forming apparatuses such as LED printers.

As described above, according to the present invention, an automatic paper feeding section;
A structure including a manual paper feed section, a first paper feed guide, and a second paper feed guide is provided so as to be movable to the outside of the image forming apparatus main body in a direction perpendicular to the axis of the photoreceptor. 1 paper feed guide and 2nd
Since the paper feed guide is swingably supported with respect to the structure, the downstream side of the manual paper feed section,
Alternatively, if a paper jam occurs downstream of the automatic paper feed section, by rotating the first paper feed guide, or if a paper jam occurs downstream of the register means, the second paper feed By rotating the paper guide, jammed recording paper can be easily removed.

In addition, the manual paper feed section and automatic paper feed section are integrated.
Since it is pulled out in a direction perpendicular to the axis of the photoreceptor, there is no risk of wrinkled ridges getting caught in the middle when removing the recording paper.

[Brief explanation of drawings]

Each of the drawings shows one embodiment of the present invention.
The figure is a front sectional view showing a state in which the automatic paper feeder is attached, and FIG. 2 is a front sectional view showing a state in which the automatic paper feeder is pulled out. DESCRIPTION OF SYMBOLS 1...Manual paper feed section, 2...Automatic paper feed section, 3...Copying machine main body, 4...Photoconductor drum, 7...Short focus lens array, 9...Charging corotron, 10...Developing device, 1
2... Corotron for transfer, 27... Paper feed cassette, 3
6...Slider.

Claims (1)

[Scope of Claims] 1. A photoreceptor, means for forming an electrostatic latent image on the photoreceptor, means for developing the electrostatic latent image with toner, and means for transferring the toner image onto recording paper; An automatic paper feed section, a manual paper feed section provided above this,
A register means for feeding the recording paper fed from the automatic paper feeding section or the manual paper feeding section once and then again, and a register means for feeding the recording paper again from the automatic paper feeding section or the manual paper feeding section; An image forming apparatus comprising: a first paper feed guide configured to sandwich the recording paper between the register means and the transfer means; and a second paper feed guide configured to sandwich the recording paper transferred from the register means to the transfer means from above and below. The structure including at least the automatic paper feed section, the manual paper feed section, the first paper feed guide, and the second paper feed guide is attached to the main body of the image forming apparatus in a direction perpendicular to the axis of the photoreceptor. An image forming apparatus, wherein the first paper feed guide and the second paper feed guide are swingably supported with respect to the structure.