JPH0395582A - Heat fixing device - Google Patents

Abstract

PURPOSE:To improve the operability and safety and to reduce the price by the simplification of the structure by providing a slide mechanism and allowing the slide mechanism to slide along a paper conveying mechanism by at least its length. CONSTITUTION:The slide mechanism 13 consisting of slide rails is fitted between both sides of the heat fixing device 12 and a printing main body part 14. Then the fixing device 12 is supported slidably along a form conveying mechanism 3 by at least the length of the fixing device 12. Then a form 4 jamming between the fixing device 12 and conveying mechanism 3 can be removed in safety by sliding the fixing device 12 along the conveying mechanism 3 without opening the fixing device 12. Consequently, the need for other safe mechanisms is eliminated, the structure is simplified, and the price is reduced. Further, the operability and safety are improved.

Description

[Detailed Description of the Invention] [Summary] Regarding the structure of a heat fixing device in an electrophotographic device, etc., for the purpose of improving operability and safety and reducing costs by simplifying the structure, this paper conveyance mechanism has been developed. In a heat fixing device that heats and fixes a toner image on paper transported by a heat source using a heat source, the heat fixing device is supported by a slide mechanism so that the heat fixing device can be slid at least by the length of the heat fixing device along the paper transport mechanism. It is okay to do so.

[Industrial Field of Application] The present invention relates to the structure of a heat fixing device in an electrophotographic device or the like.

[Conventional technology]

A heat fixing device to which the present invention is applied is applied, for example, to a heat fixing section in an electrophotographic apparatus that fixes a toner image on a sheet of paper using flash light.

As shown in the side view of FIG. 3, the heat fixing section consists of a heat fixing device 1 and a paper conveyance mechanism 3, and the heat fixing device 1 uses a heat source such as a plurality of xenon lamps (hereinafter referred to as xenon lamps).
2 in parallel, and includes a paper conveyor 13 facing the heat source 2 with a gap therebetween.

The paper transport mechanism 3 has a plurality of heat-resistant suction rollers 5, which are rotated by adsorbing the paper 4 with a vacuum pump (not shown) or the like and transporting the paper in a predetermined direction, so as to be perpendicular to the transport direction of the paper 4. They are installed in parallel.

Therefore, it is attracted to the belt conveyor mechanism 6's helt 6a,
The paper 4 conveyed to the fixing device 1 by the rotation of the roller 1-6a is attracted by the suction roller 5 of the fixing device 1, and is sequentially conveyed to the left in the figure by the rotation of the suction roller 5.

At the same time, a plurality of xenon lamps 2 are driven intermittently to perform heat fixing by shining flash light onto the 1/2 toner image on the paper.

The sheet 4 that has been fixed in this manner is discharged from the fixing device 1 and is conveyed to a stacker (not shown) or the like by a feed roller at a subsequent stage.

[Problem to be solved by the invention]

The heat fixing device can be opened and closed about a fulcrum 8 provided on one side, as shown in the side view of FIG. 4, for the purpose of removing jammed sheets of paper being conveyed.

When this thermal fixing device 1 is opened, it is necessary to prevent the operator from accessing the high voltage part in order to protect the operator from high voltage, and as a safety mechanism, when it is closed, it is connected to the xenon lamp 2. It is equipped with connectors 9a and 9b that can be energized and that, when opened, release the connection for safety and automatically cut off the high-voltage current.

Further, the flash illumination surface of the heat fixing device 1 is a glass plate IH fixed to the metal frame 10.

Immediately after continuous printing, the metal frame 10 and glass plate 11 absorb the radiant heat of flash light and reach a high temperature of over 300'C.For operator safety, they must be cooled down using a cooling fan, etc. The present invention has the problem that a safety mechanism is required to prevent the heat fixing device 1 from being opened until the temperature drops to a point where it is not dangerous for the heat fixing device 1 itself, which makes the structure complicated and expensive. The purpose is to improve operability and safety, and to reduce costs by simplifying the structure.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, as shown in the principle diagram of FIG. At least the heat fixing device 1
It is supported so that it can slide by a length of 2.

[Effect]

When paper is jammed and the paper needs to be removed, it can be removed by sliding the paper along the paper transport mechanism without opening the heat fixing device.

〔Example] FIG. 2 shows an embodiment of the wooden invention.

Identical parts are designated by the same reference numerals throughout the figures.

In the present invention, as shown in the perspective view of FIG. 2, a slide mechanism 13, such as a slide rail, is installed between both sides of the heat fixing device 12 and the printing main body 14, and the heat fixing device 12 is attached to the paper. The heat fixing device 12 is slidably supported along the transport mechanism 3 by at least the length of the heat fixing device 12 .

Therefore, it is possible to safely remove the jamb 4 stuck between the heat fixing device 12 and the paper transport mechanism 3 by sliding it along the paper transport mechanism 3 without opening the heat fixing device 12. Become.

Therefore, the safety mechanism of the prior art becomes unnecessary and the structure is simplified.

〔Effect of the invention〕

The wood invention has many economical and industrial effects, such as safely removing paper jams in the heat fixing section and simplifying the structure.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of a heat fixing device according to the present invention, FIG. 2 is a perspective view of a heat fixing device according to the present invention, FIG. 3 is a side view of a heat fixing device to which the present invention is applied, and FIG. 4 is a conventional diagram. 5 6 is a side view explaining the problems of the heat fixing device. In the figure, 1 and 12 are heat fixing devices, 2 is a heat source (xenon la 3 is a paper conveyance mechanism, 5 is a suction roller, 6a is a belt, 8 is a fulcrum, 10 is a metal frame, 13 is a slide mechanism, 4 is paper, 6 is a conveyance mechanism, 7 is a feed roller, 9a, 9b connectors, 11 is a glass sheet, and 14 is a printing main body. 7

Claims (1)

[Claims] In a heat fixing device that heats and fixes a toner image on a sheet of paper transported by a paper transport mechanism (3) using a heat source (2), the heat fixing device ( 12) is slidably supported along the paper transport mechanism (3) by at least the length of the heat fixing device (12).