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Belt transfer device and imaging equipment using the belt transfer device

An imaging device and a belt conveying technology, which are applied to the equipment of the electric recording process using the charge pattern, the electric recording process using the charge pattern, transportation and packaging, etc., can solve the problems of snakes, damage, high cost, etc.

Inactive Publication Date: 2006-06-28
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] As mentioned above, there are still technical problems to be solved in the conventional belt deflection prevention technology: the stress generated by the deflection force in the belt contact portion where the belt contacts the adjustment member such as the flange or the rib, at the end of the auxiliary roller, and in the gap Make the belt undulate, meander, crack, break
[0020] In the case of using auxiliary rollers, the structure is more complicated, and the high cost is also a drawback

Method used

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  • Belt transfer device and imaging equipment using the belt transfer device
  • Belt transfer device and imaging equipment using the belt transfer device
  • Belt transfer device and imaging equipment using the belt transfer device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Figure 4 is a schematic diagram showing Embodiment 1 incorporating the image forming apparatus of the present invention.

[0079] In this figure, the image forming apparatus includes a photosensitive drum 10 and an intermediate transfer belt 20 that contacts the photosensitive drum 10 at a fixed area in a state where the intermediate transfer belt 20 extends along the shape of the photosensitive drum 10, and moves from The photosensitive drum 10 receives a toner image.

[0080] In this embodiment, the photosensitive drum 10 includes a photosensitive layer whose electrical resistance decreases under light. Set around the photosensitive drum 10: a charging unit 11 for charging the photosensitive drum 10; an exposure unit 12 for writing electrostatic latent images of various colors (in this embodiment: black, yellow, magenta, and cyan). to the charged photosensitive drum 10; the rotary developing unit 13 is used to develop the color latent image on the photosensitive dr...

Embodiment 2

[0123] 6( a ) and FIG. 6( b ) show key parts (belt unit assembled with the intermediate transfer belt 20 ) of the belt conveying device of Embodiment 2. As shown in FIG.

[0124] In this figure, like Embodiment 1, the belt conveying device includes a guide member 50 close to the tension roller 22, but the structure of this guide member 50 is different from that of Embodiment 1.

[0125] The guide member 50 of this embodiment as shown in FIGS. 6( a ) and 6 ( b ) includes a guide shoe 51 provided at a portion opposite to the center portion of the bending region "m" of the tension roller 22 . The guide block 51 includes an arcuate guide surface 52 in contact with the belt end edge portion 20a.

[0126] Note that the intermediate transfer belt 20 passes the tension roller 22 in this embodiment. At the entrance and exit of the bending area "m" of the belt 1 on the tension roller 22, the tension pressure caused by the belt end edge portion 20a is large, and the belt end edge portio...

Embodiment 3

[0129] Figure 7 A key part of the belt conveying device (belt unit assembled with the intermediate transfer belt 20 ) of Embodiment 3 is shown.

[0130] In this figure, like Embodiments 1 and 2, the belt conveying device includes a guide member 50 close to the tension roller 22, but the structure of this guide member 50 is different from that of Embodiments 1 and 2.

[0131] The guide member 50 of this embodiment rotates the guide roller 57 on the support bracket 56 . The belt end edge portion 20a protruding from one end of the tension roller 22 slides in contact with the rotating outer periphery of the guide roller 57 to adjust the bending.

[0132] In this embodiment, the sliding resistance value between the guide member 50 and the belt end edge portion 20a is extremely small. The frictional resistance associated with the guide member 50 does not prevent the intermediate transfer belt 20 from running.

[0133]As described above, according to the present invention, the gu...

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PUM

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Abstract

A belt transporting device for circulatingly transporting an endless belt, which is in use with an image forming apparatus, such as copying machine or a printer. The belt transporting device includes a plurality of tension rolls, an endless belt laid on the tension rolls, the endless belt having a belt-end edge part protruding from an end of one of the tension roll and a guide member provided in the vicinity of the endless belt. The guide member comes in contact with the belt-end edge part so as to bend the belt-end edge part in a tapering-off direction. The guide member regulates the shape of the belt-end edge part so that a rotary peripheral length of the belt-end edge part becomes smaller than that of an area where a rear side of the endless belt is in contact with the tension roll.

Description

technical field [0001] The present invention relates to a belt conveyor for endlessly conveying an endless belt for use with an image forming apparatus such as a copier or a printer. More particularly, the present invention relates to a belt conveyor capable of effectively preventing belt deflection and an image forming apparatus employing such a belt conveyor. Background technique [0002] Recently, for example, in electrophotography-based imaging devices, there have been increasing demands for size reduction, improvement in image quality, and cost reduction. In order to meet these requirements, it is very effective to employ a belt unit in an intermediate transfer body, a paper conveyance body, a fixing unit, and the like. [0003] For example, in an intermediate transfer type image forming apparatus based on an electrophotography system that has been proposed, toner images of various colors are successively formed on a photoreceptor, and these color toner images are firs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/16G03G21/00G03G15/00B65H5/02
CPCG03G15/1615G03G2215/00151
Inventor 佐藤雅弘北村笃行仓本新一铃木渡渡边幸市西出秀一山本光雄
Owner FUJIFILM BUSINESS INNOVATION CORP
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