JPS6162087A - Paper peeling device of fuser roll - Google Patents

Abstract

PURPOSE:To peel off fixing paper surely from a fuser roll by blowing air from plural air buffer manifolds arranged on proper positions of the outside periphery of a soft fuser roll on the paper advancing direction side with a proper interval at respectively shifted timings. CONSTITUTION:An unfixed toner image is transferred to paper 18 by a transfer part, the paper 18 is carried and passed through a contact part between the fuser roll 6 and a pressure roll 6' in a fixing device 7 to fix the image, and then air is blown out from the initial air buffer manifold out of plural manifolds 10- to the paper 18 to be adhered and wound around the surface of the fuser roll 6. If the paper 18 is not peeled off from the surface of the roll 6, air is blown out again from the succeeding manifold 10 to blow air to the paper 18 with plural times. Consequently, troubles such as the winding of the paper 18 around the roll 6 and the delay of operation due to the removing work of the paper 18 are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a heat roller type fixing device used in an electrophotographic copying machine, etc., in which a soft fuser roll is used. The present invention relates to a peeling device that peels the paper that is attached and tends to be wound from the surface of the roll after fixing.

(Prior Art) In a heat roller type fixing device used in a conventional electrophotographic copying machine, etc., after fixing, a soft fuser roll adheres to the surface of the fuser roll of the fixing device using a soft fuser roll. An air buffer manifold ° is used for separating paper, and the air buffer manifold °
In some cases, the air is blown so that the paper is separated from the surface of the fuser roll by the pressure of the air.

(Problems to be Solved by the Invention) However, in a fixing paper peeling device using this air buffer manifold, one air buffer manifold disposed on one outer periphery of the paper in the direction in which the paper travels on the fuser roll removes the paper after the fixing process. Since the paper was designed to be peeled off from the surface of the fuser roll, if the paper failed to be peeled off during the air blowing, the paper would wrap around the roll, making removal work extremely difficult. was there.

(Means and Effects for Solving the Problems) The present invention has been made in order to eliminate the drawbacks of the paper peeling device using an air buffer manifold in the conventional heat roller type fixing device. A plurality of air buffer manifolds for paper separation after fixing are arranged at appropriate intervals on the outer periphery of the user roll in the direction in which the paper travels, and these air buffer manifolds are operated multiple times at different timings. By making it possible to blow air across a wide range of areas, the paper that adheres to the surface of the fuser roll after fixing and tries to wrap around -
If the paper cannot be peeled off with the pressure of the first air blow, the paper will be peeled off with the next air blow.
This is what I did.

(Example) The present invention will be described in detail below based on an example shown in the drawings.

FIG. 1 is a schematic layout diagram showing an embodiment of a paper peeling device for a user roll according to the present invention, and FIG. 2 is a partially enlarged side view of the same device.

In these figures, in a machine body 1 such as an electrophotographic copying machine, a fixing machine consisting of a paper feed section 2, a transfer section 4 of a photoreceptor 3, transports 5 and 7, a user roll 6, and a pressure roll 6'. Through the device 7, the output tray pair 8,
8' provides a paper transport path for transporting the paper onto a paper discharge tray 9 outside the machine. A plurality of air buffer manifolds 10 are disposed at predetermined intervals on the outer periphery of the fuser roll 6 of the fixing device 70 in the paper traveling direction in the paper transport path,
These air buffer manifolds 10... are connected to a near compressor (not shown), and the operation timing is controlled by the near compressor to match the rotational speed of the fuser roll 6. The subsequent air blowing by the air buffer manifolds 10, . . . is made to operate with a slight time delay with respect to the air blowing by the air buffer manifold 010.

The present invention is constructed as described above. Next, its operation will be explained.

Original 12 placed at a predetermined position on platen glass 11
The image is transferred to the exposure lamp 13, the movable mirror 14... and the lens 15. An electrostatic latent image is formed on the surface of the photoreceptor 30 via an optical system such as a fixed mirror 16, and the electrostatic latent image is developed by a developing device 17. Then, the developed toner particles are transferred onto the surface of the photoconductor 3 in the transfer section 4 onto the paper 18 fed from the paper feed section 2.
The paper 18 is transferred to the fixing device 7 by the transport 5, and passed through the contact portion between the fuser roll 6 and the pressure roll 6' of the fixing device 7, thereby applying a predetermined thermal energy and pressure. and fixes the image on the surface of the paper 18. During this fixing, the resin contained in the toner particles transferred to the surface of the paper 18 is melted by the thermal energy of the phaser roll 6, and the pressure of the pressure roll 6' causes the resin contained in the toner particles to be melted by the fuser roll. 6, the plurality of air buffer manifolds 10 adhere to the surface of the roll 6 and try to wrap around it.
1!・After that, air is first blown between the fuser roll 6 and the leading edge of the paper 1B by the first manifold 10, and the paper 18 is peeled off from the surface of the phaser roll 6 by the pressure and transferred to the next transfer means. However, when the paper 18 is not peeled off by the first air buffer manifold 10, K is transferred again by the next air buffer manifold 10 or the next manifold °10.
Alternatively, blow air to the fuser.
It is peeled off from the surface of the roll 60 and transferred to the next transfer means.

(Effects of the Invention) The present invention is a book constructed and used as described above, in which unfixed toner particles are transferred by the transfer unit 4 of the photoreceptor 3 and the paper being conveyed is transferred to the fuser of the fixing device 7. -Roll 6
After the image is fixed by passing through the contact area between the fuser roll 6 and the pressure roll 6', the paper 18 that is attached to the surface of the fuser roll 6 and is about to be wound is transferred to a plurality of air buffer manifolds 10... The first manifold 1
By blowing air at o, the paper 18 is
If the sheet 11C is not peeled off from the surface of the roll 6, air is blown again in the next manifold 10, so that the paper 11C can be blown with air multiple times.
This allows the paper 18 to be peeled off from the surface of the user roll 60 after the fixing process is completed, so it is almost impossible to fail to peel the paper 18 from the surface of the user roll 60. Paper 18
This eliminates the need for time-consuming work to remove the 7-user roll 6 from being wrapped around the surface of the roll 6, thereby contributing to improving the reliability of the fixing device.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of a paper peeling device for a fuzer roll according to the present invention, and FIG. 2 is a partially enlarged side view of the same device. In the figure, 1...Machine main body, 2...Paper feed section, 3...Photoconductor, 4...Transfer section, 5...Transport, 6...
・Fuser roll, 6'...pressure roll,
7...Fixing device, 8.8'...Ejection roll pair, 9.
・・Paper output tray, 10・Air buffer manifold, 11・Platen glass, 12・Document, 13・
... Exposure lamp, 14... Moving mirror, 15... Lens, 16... Fixed mirror, 17... Developing machine, 18
...Paper. -N

Claims (1)

[Claims] In a heat roller type fixing device such as an electrophotographic copying machine, a plurality of air buffer manifolds for separating the paper after fixing are arranged at appropriate intervals on the outer periphery of the soft fuser roll on the paper traveling direction side. , a fuser roll characterized in that the fixing paper adhering to the outer periphery of the fuser roll is peeled off from the fuser roll by blowing air through the plurality of air buffer manifolds at different timings. Paper peeling device.