JPH0419565Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a blade cleaning device that uses a blade to scrape off toner remaining on a photoreceptor of an image forming apparatus.

(Conventional Apparatus) FIGS. 2 to 5 show an example of a conventional blade cleaning apparatus for an image forming apparatus. When a positive polarity voltage is applied to the residual toner on the photoreceptor drum 1 by the pre-cleaning static eliminator 3, the toner 2 easily repels each other since the photoreceptor drum 1 is a positive electrode. Next, the toner 2 is scraped off by the first stage fur brush 4,
Furthermore, the remaining toner is completely scraped off by the blade 5, and the scraped toner is sent to the toner outlet 6.
It is designed to be transported outside the unit. As shown in FIG. 3, the base of a blade cleaner 9 made of polyester film is fixed to the tip of a blade cleaner support member 8 fixed to the casing 7 at the bottom of the blade 5, as shown in FIG. When the blade cleaner 9 is turned, the tip of the blade cleaner 9 is slightly retracted from the working edge of the blade 5, and when the blade 5 is displaced outward about the pressure fulcrum 10, the tip of the blade cleaner 9 rotates as shown in FIG. It rotates around a dynamic fulcrum 11 and protrudes from the working edge of the blade 5, and at this time scrapes off foreign matter such as toner and paper dust accumulated on the edge of the blade 5.

However, as shown in Fig. 5, the tip of the blade cleaner 9 cannot completely follow the deflection of the blade 5 when the blade is pressurized, and if used for a long time, the blade cleaner 9 may creep due to heat etc. However, there is a problem in that a gap 12 is created between the tips of the blade 5 and the blade cleaner 9, and the toner scraped by the blade enters and becomes a load on the blade, resulting in poor cleaning.

In addition, when a thin metal plate is used instead of a resin such as a polyester film as a blade cleaner, problems such as damage to the blade may occur, and the ability to follow the blade's movement becomes poor. There is.

Furthermore, when the blade is released from pressure contact with the photoreceptor, the tip of the thin metal plate will protrude from the tip of the blade, so if maintenance or inspection is performed in this state, maintenance, etc. It is dangerous as it may cause injury to the fingertips of the person performing it.

(Purpose) The present invention was developed in view of the above-mentioned problem, and uses an auxiliary member made of a metal plate-like elastic body to constantly press the tip of the blade cleaner against the tip of the blade to prevent gaps from forming. , the purpose is to prevent the occurrence of cleaning defects.

(Structure) In order to achieve the above object, the present invention includes a blade that scrapes off the residual toner on the photoreceptor, one end of which is fixed, and the other free end that contacts the tip of the blade to remove foreign matter adhering to the tip of the blade. a metal plate-like elastic body having one end fixed to the free end tip of the blade cleaner from the side opposite to the contact surface with the blade of the blade cleaner; This is characterized in that the tip of the other end of the auxiliary member made of a body is pressed against the other end.

Hereinafter, a detailed explanation will be given based on an example. 13
is an auxiliary member made of a metal plate-like elastic body such as a bronze plate or a stainless steel plate, and its tip is pressed against the tip of the blade cleaner 9 on the side opposite to the working surface without adhesive.

Further, as is clear from FIG. 1, both the blade cleaner 9 and the auxiliary member 13 have one end fixed and the other end free.

Therefore, even if the blade 5 bends, there is no gap between the tip of the blade cleaner 9 and the blade 5, and creep can also be prevented.

(Effects) The present invention consists of a blade that scrapes off residual toner from the photoreceptor, and a plate-shaped elastic body that has one end fixed and the other free end in contact with the blade tip to remove foreign matter adhering to the blade tip. an auxiliary member made of a metal plate-like elastic body having one end fixed to the free end tip of the blade cleaner from the side opposite to the contact surface with the blade of the blade cleaner; Since the tip of the other end is press-contacted, even if the blade bends, the auxiliary member always presses the tip of the blade cleaner against the tip of the blade on the opposite side from the working surface of the blade, so there is no gap, so a blade cleaner made of polyester film is used. Even if the toner is used, the toner will not get clogged, and cleaning failures can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a front view of the main part of an embodiment of the present invention, Fig. 2 is a front view of a conventional device, Fig. 3 is an enlarged front view of the blade part when the blade in Fig. 2 is pressed, and Fig. 4 is the same as Fig. 2. Enlarged front view of the blade part when the blades are separated, No. 5
The figure is a front view of the blade in FIG. 4 when it is bent. 1... Photosensitive drum, 5... Blade, 9...
Blade cleaner, 13... Auxiliary member.

Claims (1)

[Scope of utility model registration request] A blade cleaner comprising a blade for scraping off residual toner from the photoconductor, and a plate-like elastic body having one end fixed and the other free end in contact with the blade tip to remove foreign matter adhering to the blade tip; Pressing the other end of an auxiliary member made of a metal plate-like elastic body with one end fixed to the free end of the blade cleaner from the side opposite to the contact surface with the blade of the blade cleaner. Blade cleaning device for image forming equipment.