JPH03130793A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent toner which is not fixed from being disposed of by providing an auxiliary developing roller, performing switching to an image formation state wherein collected toner is used, and performing development on a photosensitive body. CONSTITUTION:An image is formed on a photosensitive body drum 1 with toner which is attracted through developing rollers in developing devices 2 and 3 and then toner remaining on the surface of the photosensitive body drum 1 is removed by a cleaning blade 6. This residual toner is collected in a cleaning box 7 and when it is collected exceeding a specific amount, that is indicated by an annunciating means. Then a switching control part operates the auxiliary developing roller 8, a development switching means, and a cleaning blade operation switching means to performs the switching to the image formation state wherein the collected toner is used. At this time, the developing rollers are at non-development positions, the blade 6 turns off, and the roller 8 attracts the collected toner to the photosensitive body 1. Consequently, toner which is not fixed is not disposed of.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field This invention relates to an image forming apparatus such as a copying machine, and more specifically, to a toner collecting apparatus having a structure that can convert toner collected in a cleaning section into a container and dispose of it. It is related to.

(B) Conventional technology A conventional collection device of this type has a structure in which a heater is installed to heat a toner belt, and the toner is disposed of by being made into a container on the belt.
Refer to Publication No. 7], a scattering device that accumulates and scatters the toner collected by the cleaning section, and a control means that scatters the toner onto the paper sent out at a predetermined time by the scattering device, thereby causing the toner to be scattered on the paper. It has been proposed to fix the toner using a fixing device so that the toner can be disposed of.

(c) Problems to be solved by the invention However, in order to discard toner, the former method (yo,
Example: i', because it is necessary to incorporate the heating belt, drive roll, heater, waste toner collection box, etc. into the eye.)
There is a risk that the entire summer photography machine will become larger.

On the other hand, even in the latter case, since a spraying device is provided directly below the cleaning section, a control means for spraying, etc. is provided, there is a risk that the size will be increased and the rocky side will become elegant as in the above case.

However, if toner is placed thickly on the belt or paper, there is a risk that the toner will be disposed of before it is completely fixed.

The object of the present invention is to provide a copying machine that can easily dispose of toner by converting toner into a container using a simple r=m mechanism.

(d) Means for Solving the Problems This invention provides a method for cleaning the surface of the photoreceptor with a cleaning blade after complete image formation with toner that is adsorbed onto the photoreceptor via a developing roller in a developing device. It has a cleaning device for removing residual toner, a notification means for notifying that more than a predetermined amount of collected toner has been collected in the cleaning device, and switching between an active state, one upright position, and a non-actual state, one upright position. A developing switching means for switching a developing roller to a non-developing position; a cleaning blade operation switching means for switching a cleaning blade to an OFF operation; and a cleaning blade operation switching means for switching a developing roller to a non-developing position; When the linear developing roller and the notifying means notify that a predetermined amount or more of toner has been collected, the auxiliary developing roller, the developing switching means, and the cleaning blade operation switching means are actuated to change the state of image formation using the collected toner. The image forming apparatus includes a switching control section that switches to the image forming apparatus.

That is, the present invention provides a cleaning device with a linear developing roller having the same function as the developing roller of the developing device, and develops the toner collected by the cleaning device on the photoreceptor, thereby removing the toner from the toner to be collected for disposal. The image forming state can be switched to an image forming state according to the method described above, and the collected toner can be disposed of.

The developing switching means and the cleaning blade switching means in the present invention include, for example, a solenoid having a configuration in which a solenoid is turned on or off, and a developing device or a blade is moved away from the surface of the photoconductor, respectively. Can be mentioned.

As a specific example, the blade switching means is, as shown in FIG. , the holder 24 is inserted into the bottle 25 and is rotatably mounted on the bottle shaft 26 with a gap, and the holder 24 also has a guide groove for sliding the blade fixing 1Ht27 and attaching it in a removable manner. 28 are provided. A temporary spring 29 is attached to the guide groove 28 so that the blade 2
3 is biased through the blade fixing part 27 in a direction opposite to the direction in which it is pressed against the photoreceptor drum (photoreceptor) L, thereby turning on the cleaning solenoid.
If the holder 24 is inserted into the bottle 25 and rotatably mounted on the bottle shaft 26 (see FIG. 4(a)), when the blade 23 comes into pressure contact with the photoreceptor drum 1. In addition, when the solenoid is OFF (Fig. 4 (
b)), the blade 23 can be reliably kept out of contact with the photoreceptor drum l.

It is possible to separate the developing device from the photoreceptor drum by using the developing switching means, a solenoid for the developing device by Kumano similar to the above, a temporary spring, and the like.

In this invention, the notifying means may include a well-known toner amount detection sensor, and the operator is notified (displayed) via the switching control section.

The linear developing roller in this invention has the same structure as the developing roller of the developing device, and is composed of a rotatable sleeve roller and a magnet roller fixedly housed within the sleeve roller.

In the present invention, the switching control section repeatedly performs image formation using the collected toner until the collected toner decreases by a certain amount.

(e) Examples The present invention will be described in detail below based on examples shown in the drawings. Note that this invention is not limited to this.

In FIG. 1.2, the copying machine forms an image with toner adsorbed onto a photoreceptor drum (photoreceptor) i via a developing roller 4.5 in a developing device 2.3, and then uses a cleaning blade to form an image. 6 includes a cleaning box (cleaning device) 7 for removing residual toner on the surface of the photoreceptor drum, a notification means for notifying that a predetermined amount or more of toner has been collected in the cleaning box, and a developing device. Developing roller 4 that can be switched between position and non-developing position
．． 5 to the non-developing position; and a cleaning blade operation switching means to charge the photosensitive drum 1 and switch the cleaning blade 6 to the OFF operation while the developing device 2.3 is separated; The collected toner is transferred to the photoreceptor drum [
When the auxiliary developing roller 8 for adsorbing the toner onto the toner and the notifying means notify that a predetermined amount or more of toner has been collected, the auxiliary developing roller, the developer switching means, and the cleaning blade operation switching means are actuated, and the toner is collected. The image forming apparatus mainly includes a switching control section for switching to an image forming state using toner.

Figure 3: Using the developing device 3, the developing roller 5 (A
A normal cleaning state is shown in which residual toner remaining after transfer is collected by the cleaning blade 6 among the toner adsorbed on the photoreceptor tram l (rotated in three directions) by the rotation in three directions.

At this time, the auxiliary developing roller 8 is stopped.

Next, the control method by the switching control section will be described with reference to the flowchart shown in FIG.

As mentioned above, when performing development in the developing section 2.3, select the normal copying state using toner in the developing device 3 in step 100, feed normal transfer paper (step 1
ot) The drum is charged by the charging unit 9 (step 102), Ef light (step 103) is applied, and the drum is developed by the developing device 3 (step 104).
After completing a series of copying steps, such as further transfer in the transfer unit 10 (step 105), the remaining toner on the photoreceptor drum is collected by a cleaning blade (step 1).
06), the fixing section 11 fixes the transfer paper (step 107)
), and finally the copy paper is discharged (step 10B).

Next, a copying process using recovered toner will be explained using FIG. 1.2.

It is determined whether a certain amount or more of residual toner has accumulated in the cleaning box 7 during the third self-cleaning (step 100), and it is determined that residual toner has accumulated.
A command to feed the transfer paper for toner disposal is issued (step 201), and after the transfer paper for toner disposal is fed (step 202), the developing device 2.3 is moved from the photoreceptor drum 1 to the M (step 203). ), then the charging unit 9 charges the drum 1 (step 204), and the cleaning blade 6 is separated from the drum surface (step 205).

After exposure, the linear developing roller 8 is rotated in the C direction to adsorb the recovered toner in the cleaning box 7 onto the drum and perform development (step 20).
6). After that, the transfer unit IO performs transfer (step 207), and the fixing unit 11 performs fixing (step 208), and then the copy paper is discharged (step 20).
9).

Next, the amount of collected toner used in this I process is detected (step 210), and if it is necessary to collect it immediately and copy it into i-nitoner, the process returns to step 201 again, and the same process is repeated. After repeating the process until a predetermined amount of toner is collected and reduced to f toner, copying using the collected toner is completed (step 211).

(F) Effects of the Invention As described above, according to the present invention, the cleaning device is provided with an auxiliary developing roller having the same function as the developing roller of the developing device, and the toner collected by the cleaning device is developed on the photoreceptor. Accordingly, it is possible to switch to an image forming state using the collected toner for disposal, and there is an effect that the collected toner can be disposed of at low cost without using a large device. Furthermore, there is no possibility that the toner will not be completely fixed and will be discarded.

[Brief explanation of the drawing]

Figures 1.3 and 3 are respectively A''', a configuration explanatory diagram showing different operations according to embodiments of the present invention, Figure 2 is a flowchart in the above embodiment, and Figures 4 (a) and (b). Haso 41
FIG. 7 is a configuration explanatory diagram illustrating different operations of main parts in each of the above embodiments. ...Photoreceptor drum (photoreceptor), ...Development device, ...Development roller, ...Cleaning blade, ...Cleaning box (cleaning device), ...
・Linear development roller. [2.3 5 6 ・・ 7 ・ 8・・ (a) Figure 4

Claims (1)

[Claims] 1. After forming an image on the photoreceptor using the toner adsorbed by the developing roller in the developing device, it has a cleaning device that removes residual toner on the surface of the photoreceptor using a cleaning blade. a notifying means for notifying that a predetermined amount or more of toner has been collected; a developing switching means for switching a developing roller that can be switched between a developing position and a non-developing position to a non-developing position; and a cleaning blade that is switched to an OFF operation. A cleaning plate operation switching means, provided in the cleaning device,
An auxiliary developing roller for adsorbing the collected toner onto the photoconductor, and the notifying means notifying that a predetermined amount or more of toner has been collected, the auxiliary developing roller, the developing switching means, and the cleaning blade operation switching means. an image forming apparatus comprising: a switching control section that activates the switching control section to switch to an image forming state using collected toner;