JPS6320740B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper ejection roller device used in a recording apparatus such as a copying machine.

2. Description of the Related Art Conventionally, a paper ejection roller device A as shown in FIG. 1 has been used in a paper ejection section of a copying machine or the like. That is, this paper ejection roller device A has paper ejection rollers F and G that take up the recording paper E from the heating roller C and the pressure roller D of the heat fixing device B, which are located adjacent to each other, and eject it to the outside of the machine. . Guide members H and I for guiding the recording paper E are installed between these paper ejection rollers F and G, which may or may not roll into contact with each other, and the heat fixing device B, and the toner image is fixed thereon. The recording paper E is guided in the direction of paper ejection rollers F and G.

By the way, the surfaces of the guide members H and I are similar to the recording paper E.
In order to reduce the frictional force between the recording paper When the condition is reached, “JIAM”
This may cause the paper to be folded or ejected.

The present invention proposes a paper ejection roller device that can reliably prevent the above-mentioned "jamming" and folded paper from being ejected. In a paper ejecting roller device that ejects the paper out of the machine by rotational movement, an endless belt is hung between a roller positioned below the conveyed recording paper and the lower paper ejecting roller, and the endless belt is used for recording. It is characterized by being driven at a speed faster than the paper movement speed.

Embodiments of the present invention will now be described in detail with reference to FIGS. 2 to 4.

FIG. 2 shows the relationship among the heat fixing device 1 of the copying machine, the paper ejection roller device 2 of the present invention, and the paper ejection tray 3. The toner image on the recording paper E is heated and fixed by the action of a heating roller 4 and a pressure roller 5 that is pressed against the heating roller 4, and a guide plate 6 attached to these rollers.
7 in the direction of the paper ejection roller device 2 .

A paper discharge roller device 2 having paper discharge rollers 8 and 9 that roll into contact with each other has a mounting frame 10.
The paper ejection rollers 8 and 9 are assembled to these shafts 11 and 12. Driven to hold. and,
According to the present invention, a shaft 13 installed on the mounting frame 10 is located at the lower part of the guide plate 7, rollers 14 are supported on the shaft 13 so as to be freely rotatable, and exhaust rollers corresponding to these rollers 14 are provided. An endless belt 15 under tension is stretched between the paper rollers 9. This belt 15 according to the invention can itself be composed of an elastic rubber belt or a thin metal ring.

Since the illustrated embodiment has the above structure,
Since the belt 15 moves at a faster speed than the moving speed of the recording paper E in the heat fixing device 1, even if the leading edge e of the curled and weak recording paper E is restrained by the guide plate 7 as shown in the second figure, It will not cause "jams" or paper folds. That is, as the recording paper E moves, the leading edge of the recording paper E rides on the belt 15 as shown in the third figure, and the belt 15, which moves at a speed faster than the moving speed of the recording paper E, moves the recording paper E.
The curl at the tip is corrected as shown in the fourth figure. Therefore, recording paper without curls or folds is supplied to the paper discharge roller, thereby preventing "jams" or paper folds from being discharged.

After all, according to the present invention, even curled and weak recording paper can be ejected without causing "jam" or paper folding.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a conventional paper ejection roller device;
The figure is a sectional view of the area around the paper ejection roller device according to the present invention.
3 and 4 are explanatory diagrams of the operation of the paper discharge roller device shown in the second figure. E... Recording paper, 2... Paper ejection roller device, 8, 9
... Paper discharge roller, 14 ... Roller, 15 ... Belt.

Claims (1)

[Claims] 1. In a paper ejection roller device that ejects recording paper that has been processed in the machine to the outside of the machine by the rotational movement of paper ejection rollers arranged above and below, a roller located below the recording paper being conveyed and the paper ejection roller on the lower side. A paper ejection roller device characterized in that an endless belt is hung between the rollers and the endless belt is driven at a speed faster than the moving speed of recording paper.