JPH0143951B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in image forming apparatuses such as copying machines and printers.

Conventional image forming apparatuses are equipped with a paper feeding device that sequentially feeds the inserted transfer paper from the transfer paper insertion point to the photoreceptor, but it is said that work such as jam removal of this paper feeding device is troublesome. There were flaws.

In addition, in order to solve the above problems,
Japanese Patent No. 12335 proposes an image forming apparatus in which the conveyance path from the paper feed section to the photoreceptor is made into one unit and can be pulled out to the outside of the main body. This proved to be effective for jamming, etc.

However, not only does it require a new handle for the drawer to be installed on the unit, but in an image forming apparatus that has a manual paper feed section, it is difficult to mount the handle, and the transfer paper guide for manual paper feed is difficult to install. It got in the way and made it troublesome to pull out the unit.

In view of these points, the present invention enables the structure including the paper feeding device to be pulled out from inside the copying machine for inspection, and also reduces the number of parts by using the drawer handle of the structure as a transfer paper guide. An electronic copying machine in which the present invention is implemented will be described below with reference to FIGS. 1 and 2.

In FIG. 1, 1 is an exterior, 2 is a photosensitive drum that has a photosensitive layer made of a material such as selenium on its surface and is placed approximately in the center of the exterior 1, and 3 is a photosensitive drum 2 whose surface is electrically charged. A charging corotron that uniformly charges
Reference numeral 4 denotes an optical means for exposing an original image to the photoreceptor drum 2 to form an electrostatic latent image of the original image;
is equipped with a light source 5 and a short focus lens array 6 made of a focusing photoconductor in which a large number of rod-shaped lenses are closely arranged. 7 is a developing means for developing the electrostatic latent image formed on the photoreceptor drum 2 into a visible image using toner 8, and the developing means 7 includes a toner box 9, an agitator 10 for agitating the toner and frictionally charging it, and a sleeve. It consists of a magnetic brush 11 that holds the toner 8 on the outer periphery by magnetic force and supplies the toner 8 to the photosensitive drum 2 while rotating, and a blade 12 that makes the toner layer on the magnetic brush 11 uniform.

Reference numeral 13 denotes a paper feeding means, which includes a cassette paper feeding device 14, a manual paper feeding device 15, and the like. The cassette feeding device 14 includes a cassette 17 in which a large number of sheets of transfer paper 16 of the same type are stacked, a support member 18 that elastically supports the cassette 17 with rollers, etc., and a cassette feeder that transfers the top layer of transfer paper 16 under pressure. paper roller 19
and a guide cover 20. The manual paper feed device 15 includes a transfer paper insertion location 21 formed by forming a through hole in the exterior 1, and a pair of manual paper feed rollers 23 that sandwich and transport the transfer paper 22 inserted from the insertion location 21.
It consists of a lower guide cover 24 on which the transfer paper 22 is placed and slid thereon, and an upper guide cover 25 which is opened by rotating counterclockwise in the figure about a pivot 25a. This manual paper feeder 1
5 is used when replacing the cassette 17 is troublesome, such as when a small number of transfer papers 22 of a different type from the transfer paper 16 of the cassette 17 are used. 26a and 26b are a pair of paper feed rollers common to the cassette paper feeder 14 and the manual paper feeder 15;
Reference numeral 7 denotes a guide cover that is opened by rotating counterclockwise in the figure about the pivot portion 27a.

Reference numeral 28 denotes a structure including the paper feeding means 13, which is made up of a common mounting base 29 with a number of parts to be described later attached, and is pulled out and moved along a guide rail 30 from the mounting position to the outside of the copying machine together with these parts. configured to be possible. Reference numeral 31 denotes a transfer means attached to the mounting base 29 for transferring the original image visualized by the toner 8 to the transfer paper 16, 22, which is composed of a corona discharge type corotron and has an electric charge of opposite polarity to the toner 8. is generated, and the toner 8 is electrically attracted and transferred onto the transfer paper 16, 22. 32
is integrated with the transfer means 31 and the mounting base 2.
9 is a separating means for separating the transfer sheets 16 and 22 that are in close contact with the photoreceptor drum 2, and is formed of a corotron. Reference numeral 33 is a conveying means attached to the mounting base 29 and conveying the transfer sheets 16 and 22, which includes a driving roller 34, a driven roller 35, a mesh belt 36, a tension roller 37, and the transfer sheet 1.
It consists of a vacuum unit 38 etc. that sucks the particles 6 and 22 onto the belt surface.

Reference numeral 39 denotes a fixing device, which consists of a heating roller 41 with a built-in electric heater 40 and a pressure roller 42, which inserts the transfer paper 16, 22 between both rollers 41, 42, and fixes the toner image on the transfer paper 16, 22. Heat melt and fix. 43 is a storage container for silicone oil; 44 is a coating member made of a material such as a bristle and transfers the silicone oil to the surface of the heating roller 41 to apply it; 45 is in contact with the heating roller 41 to determine the amount of silicone oil to be applied. adjustment member for adjusting 4
6 is a separating member that is rotatably supported and removes oil from the surface of the heating roller 41; 47 is a pressure roller 4;
This is a separation member that removes oil from the two surfaces. The silicone oil functions to prevent the toner 8 from adhering to the surface of the heating roller 41.

Returning again to the outer periphery of the photoreceptor drum 2, numeral 48 is a static eliminating corotron for eliminating residual charge on the photoreceptor drum 2 after transfer, and 49 is a charge removing corotron for removing toner remaining on the photoreceptor drum 2 after transfer. The cleaning means 49 includes a blade 5 that comes into contact with the surface of the photoreceptor drum 2 and peels off residual toner.
0 and the peeled toner 8 are stored in the rear storage box 51.
It consists of a magnetic brush 52 and the like. Reference numeral 53 denotes a document table disposed at the upper end of the copying machine exterior 1, which is made of a material that transmits the light from the optical means 4, is supported by rollers 54 and 55, and is conveyed by a drive source 56 via a transmission means (not shown). By reciprocating in the direction of the arrow, it performs an auxiliary function to expose the original.

57 is an electrical box, 58 is a cooling fan,
The air after cooling the driving source 56, the optical means 4, etc. is discharged to the outside of the exterior 1 by the fan 58.

Therefore, in the structure 28, the transfer paper insertion location 2
1 is provided with a manual insertion handle 59 that is manually inserted into the transfer paper 22 and guided to the paper feeder 15 and also serves as a drawer handle of the structure 28. The manual insertion handle 59 is rotatably supported on the exterior 1 by a binge 60 at one end,
A recess 61 for hooking the operator's hand is formed on the back side of the other end. When the manual insertion handle 59 is not in use, it is folded as shown in FIG. 1, and when in use, it is rotated counterclockwise and opened as shown in FIG. 2, so that it is approximately parallel to the paper feed path. is supported by a support mechanism 62. The support mechanism 62 includes a first arm 62 a pivoted to the manual handle 59 and a second arm 62 pivoted to the exterior 1 with a hinge 62 b.
c are drivably connected by a pivot portion 62d.
The pivot portion 62d has an elongated hole formed in one arm in its longitudinal direction, a support pin that engages with the elongated hole in the other arm, and this support pin slides in the longitudinal direction of the elongated hole. The support mechanism 62 is formed so that it can be folded without any trouble.

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.

The present invention is configured as described above, and the structure including the paper feeding device is configured to be able to be pulled out from the mounting position toward the outside of the image forming apparatus, and the structure is provided with a handle for pulling out. The jamming process on the structure can be efficiently performed in a wide space outside the image forming apparatus, and the structure can be pulled out with good operability by hooking the operating hand on the handle.

In addition, a manual insertion handle is provided at the transfer paper insertion point of the manual paper feeder, which guides the transfer paper to the manual paper feeder and also serves as a drawer handle of the structure. The structure can be easily pulled out by hooking the structure, and the transfer paper is guided by the manual insertion handle and inserted into the paper feeder at an appropriate angle. It is possible to provide a device whose insertion operation is simple and which causes less jamming.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view showing an operation mode of a part of the same embodiment that is different from the operation mode shown in FIG. 1. 2... Photoreceptor, 15... Manual paper feeder, 21... Transfer paper insertion location, 22... Transfer paper, 28... Structure, 5
9...Hand-inserted handle.

Claims (1)

[Claims] 1. A manual paper feeding device is provided that sequentially feeds the inserted transfer paper from the transfer paper insertion point, and this manual paper feeding device feeds the transfer paper to the photoreceptor, and the toner image on the photoreceptor is transferred to the transfer paper. In an image forming apparatus that transfers and fixes a transfer sheet, the structure including the manual paper feeding device is configured to be able to be pulled out and moved from its mounting position toward the outside of the image forming apparatus, and at the transfer paper insertion location, a manual handle that guides the transfer paper to the manual paper feeder and also serves as a drawer handle on the structure;
An image forming apparatus characterized in that: