image forming apparatus

Abstract

The image forming apparatus of the present invention has: an image carrier; a transfer brush that comes into contact with the surface of the image carrier after the toner image is transferred onto the transfer paper, and collects residues adhering to the surface; The contact part of the image carrier and the rotary brush is in contact with the rotary brush on the downstream side in the direction of rotation of the rotary brush to remove the residue collected on the rotary brush; the cleaning scraper is more than the contact between the rotary brush and the recovery roller. The position on the downstream side in the direction of rotation of the recovery roller is in contact with the recovery roller, scraping off the residue recovered on the recovery roller; a sealing member, which has an outer side than both ends in the axial direction of the recovery roller The extension part, which is in contact with the recovery roller between the contact part of the transfer brush and the recovery roller and the cleaning blade, prevents the toner from moving back; the side sealing part, which is located in the width direction of the transfer paper passing area with the largest width The outer side of the position corresponding to the two side edges of the roller is separated by a predetermined interval, and the extension part is supported to the side of the recovery roller.

Description

technical field [0001] The present invention relates to an image forming apparatus having a cleaning device for removing residual toner from an image carrier. Background technique [0002] In electrophotographic image forming apparatuses such as copiers, printers, facsimile machines, and all-in-one machines, after the toner image is transferred onto transfer paper, the toner remaining on the image carrier is removed by a cleaning device. In addition, in an image forming apparatus capable of forming a full-color image, a resin-made intermediate transfer belt or an intermediate transfer belt having an elastic layer is used as an image carrier. [0003] When an intermediate transfer belt made of resin is used as an image carrier, the following cleaning device is widely used due to its simple structure and low price: In this cleaning device, the edge portion of a cleaning blade made of urethane rubber or the like The surface of the ribbon is brought into pressure contact to scr...

AI Technical Summary

Problems solved by technology

[0006] In addition, although it is possible to form a high-resistance layer by oxidizing the surface of the recovery roller, etc., the electrostatic adsorption force between the recovery roller and toner and paper powder is higher than the abutting force between the recovery roller and the sealing member, thereby Toner is prevented from being intercepted by the seal member and the side seal member. However, if the adsorption force between the recovery roller and the toner is strengthened, it will be difficult to scrape off the toner on the recovery roller by the cleaning blade. question

In addition, if the pressure applied by the cleaning blade to the recovery roller is increased in order to increase the force for scraping off the toner, there will be problems such as wear of the cleaning blade and an increase in torque applied to the recovery roller.

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