JPH0251508B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a paper peeling device for a fixing roller used in an electrostatographic printer or the like.

BACKGROUND ART Conventionally, there is a means for fixing a sheet of paper onto which a toner image has been transferred from a photoreceptor by sandwiching it between a pair of upper and lower fixing rollers. A peeling plate is elastically brought into contact with the fixing roller in order to separate the paper from the fixing roller and discharge it in one direction.

Problems to be Solved by the Invention However, there is a problem in that if the leading edge of the peeling plate is even slightly lifted from the outer periphery of the fixing roller, the paper will wrap around the fixing roller.

The present invention has been made in view of these points, and an object of the present invention is to provide a paper peeling device for a fixing roller that can reliably separate paper from a fixing roller.

Means for Solving the Problems The present invention provides a rotating brush 2 that rotates at a circumferential speed equal to or higher than the circumferential speed of the fixing rollers 17 and 18.
5 and 27 are provided in contact with the outer circumferences of fixing rollers 17 and 18, respectively. Furthermore, a stopper 31 that projects into the rotating surface of the lower rotating brush 27 and a notch 32 that allows the rotating brush 27 to escape are formed at the rear edge of the paper receiver 30. Furthermore, at least the lower rotating brush 27 is formed by flocking the belt 28 extending downward, and a paper receiver 30 is provided below the rotating brush 27.

Function: Therefore, the rotating brushes 25 and 27 separate the paper 33 from the fixing rollers 17 and 18 and discharge it.
The ejected sheets 33 are stacked on the sheet tray 30. The paper 33 in the paper tray 30 is moved by the rotating brush 27
However, by forming the stopper 31 and the notch 32 on the rear edge of the paper receiver 30, a gap can be formed between the rear edge of the paper receiver 30 and the outer periphery of the rotating brush 27. Therefore, the paper 33 in the paper tray 30 is prevented from being pulled out by the rotating brush 27. Furthermore, the belt 2 extends downwardly at least the lower rotating brush 27.
8 is formed by flocking, and by providing a paper receiver 30 at the bottom of this rotating brush 27, the paper 33
This will increase the amount of stock.

Embodiment An embodiment of the present invention will be described based on the drawings.
Reference numeral 1 denotes a housing formed by rotatably connecting a base 2 and a cover 3 via a support shaft 4. As shown in FIG. A clamp 5 for fixing the base 2 and cover 3 is provided on the opposite side of the support shaft 4. A drum frame 7 for rotatably holding the photoreceptor 6 and a light source section 8 are attached to the cover 3. This drum frame 7 includes an electrostatic charger 9, a toner box 10, and a lamp 11.
and a cleaning roller 12 are held.
The base 2 includes paper feed rollers 13, 14, a conveyor 15, a transfer charger 16, and a fixing roller 17, 1.
8, a manual feed section 19, a cassette case 20, and a paper feed roller 21.

Therefore, the rotating shafts 22, 2 are provided on both sides of the base 2.
3 and 24 are supported, a rotating brush 25 that contacts the fixing roller 17 is fixed to the rotating shaft 22, and a rotating brush 27 is wound around a pulley 26 fixed to the rotating shafts 23 and 24. Lower rotating brush 27
The annular belt 28 extending downward is flocked with hair. Although not shown, the fixing roller 18 is driven by a motor to rotate counterclockwise, and gears that mesh with each other are fixed to one ends of the fixing rollers 17 and 18. Further, the rotating shaft 22 is connected to a motor for driving the fixing roller 18 via a gear so that the rotating brush 25 rotates at a circumferential speed equal to or higher than the circumferential speed of the fixing rollers 17 and 18. 23 has rotating brushes 25, 27
Gears 29 that mesh with each other are fixed so that the two rotate at the same circumferential speed.

Further, the base 2 is provided with a paper tray 30,
A stopper 31 and a stopper 31 projecting into the rotating surface of the rotating brush 27 are provided at the rear edge of the paper receiver 30.
A notch 32 is formed to allow the air to escape.

In such a configuration, in order to perform printing, the outer periphery of the photoreceptor 6 is first charged by the charging charger 9 in the process of rotating the photoreceptor 6 once in the clockwise direction, and the laser beam 8a is emitted from the light source section 8 onto the photoreceptor 6.
is irradiated to form an electrostatic latent image, and further, toner is supplied from the toner box 10 to develop the paper 3.
3 from the cassette case 20 by the paper feed roller 21, and then the photoconductor 6 by the paper feed roller 14.
The toner image on the outer periphery of the photoreceptor 6 is transferred to the paper 33 by the transfer charger 16, and the paper 33 is further discharged while being pressurized by the fixing rollers 17 and 18 conveyed by the conveyor 15.
At this time, the paper 33 is peeled off from the fixing rollers 17 and 18 by the rotating brushes 25 and 27 and discharged to the paper receiver 30. On the other hand, the light from the lamp 11 is projected onto the photoreceptor 6 to erase the electrostatic latent image, and the remaining toner adhering to the photoreceptor 6 is removed by the cleaning roller 12.

Printing is performed as described above, but since the trailing edge of the paper receiver 30 that supports the fixed paper 33 protrudes into the rotating surface of the rotating brush 27, a gap may be created between the trailing edge and the rotating brush 27. Moreover, since the trailing edge of the paper 33 is supported by the stopper 31, the paper 33 is not pulled out from the paper tray 30 by the rotating brush 27.
Furthermore, since the rotary brush 27 is long downward, it does not separate from the paper 33 even if the paper tray 30 is positioned below, so that the stock amount of the paper tray 30 can be increased.

Effects of the Invention Since the present invention is configured as described above, the rotating brush can reliably separate the paper from the fixing roller and eject the paper, and the trailing edge of the paper tray protrudes into the rotating surface of the rotating brush. By forming a stopper that allows the rotating brush to escape and a notch that allows the rotating brush to escape, the paper will not be pulled out of the paper tray even if it is rubbed by the rotating brush. By forming a paper tray and providing a paper tray below the rotating brush, it is possible to increase the stock amount of paper stacked on the paper tray.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention.
The figure is an enlarged vertical sectional side view of the main part, FIG. 2 is a plan view of the main part enlarged, and FIG. 3 is a vertical sectional side view showing the overall structure. 6... Photoreceptor, 17, 18... Fixing roller, 25,
27... Rotating brush, 28... Belt, 30... Paper receiver, 31... Stopper, 32... Notch, 33... Paper.

Claims (1)

[Scope of Claims] 1. A fixing roller is provided which clamps and fixes the paper to which the toner image formed on the outer periphery of the photoreceptor has been transferred,
The fixing roller is characterized in that rotating brushes that rotate at a circumferential speed equal to or higher than the circumferential speed of the fixing roller and that pinch and discharge the paper after fixing are provided in contact with the fixing roller. paper peeling device. 2. A fixing roller is provided to sandwich and fix the paper to which the toner image formed on the outer periphery of the photoreceptor has been transferred;
Rotating brushes that rotate at a circumferential speed equal to or higher than the circumferential speed of the fixing roller and pinch and eject the paper after fixing are provided in contact with the fixing roller, and the lower rotating brush 1. A paper peeling device for a fixing roller, characterized in that a stopper projecting into a rotating surface is formed at a rear edge, and a paper receiver is provided at the rear edge with a notch through which the rotating brush escapes. 3. A fixing roller is provided to sandwich and fix the paper to which the toner image formed on the outer periphery of the photoreceptor has been transferred;
Each of rotating brushes that rotate at a circumferential speed equal to or higher than the circumferential speed of the fixing roller and that pinch and discharge the paper after fixing are provided in contact with the fixing roller, and at least the lower rotating brush is disposed in contact with the fixing roller. A paper peeling device for a fixing roller, characterized in that the surface of an elliptical belt extending downward is formed by flocking, and a paper receiver is provided with a trailing edge positioned below the lower rotating brush.