JPH01292393A - Cleaning device - Google Patents

Abstract

PURPOSE:To simplify mechanism by rotating a rotary paddle and delivering a toner raked down from an image bearing body with cleaning blade to the next stage and intermittently attaching the toner to said image bearing body with a swaying magnet. CONSTITUTION:When a cleaning operation is started, the toner remaining on the surface of the photosensitive drum 10 is raked down with the cleaning blade 22, the toner raked down is delivered to the toner receptacle in the next stage, and in the course of this ordinary operation, the toner T raked down with the blade 22 is again attached to the drum 10 by the swaying magnet 42 fixed to the top of a support 41 swayed in synchronism to the rotation of the paddle 26, reciprocating between the nearest position to the drum 10 and that farthest from it in a constant period, attaching the toner T in the farthest position, and transferring it to the drum 10 in the nearest position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Prior Art] The present invention relates to a cleaning device used in an electrophotographic device, etc., and more specifically, a cleaning blade that removes developer remaining on an image bearing member after transfer; The present invention relates to a cleaning device having a paddle that sends out the removed developer to a subsequent stage through rotational operation.

[Prior Art] Conventionally, as this type of cleaning device, there is one disclosed in, for example, Japanese Patent Application Laid-Open No. 60-8887.

This system is equipped with a means for supplying developer to the image carrier, such as a magnetic brush roller, on the upstream side of the cleaning blade, and by constantly supplying developer to the cleaning blade, there is a gap between the cleaning blade and the image carrier. This stabilizes the B-rubbing condition.

Furthermore, supplying the developer to the cleaning blade in this manner effectively contributes to the removal of rosin, talc, and other discharge products adhered by various corotron discharges contained in the paper transfer material.

These effects keep the surface of the image carrier in a stable state at all times, and images can be formed with less image disturbance, dirt, and the like.

[Problems to be Solved by the Invention] The conventional cleaning device as described above has a particularly complicated structure.

This is because in order to supply developer to the image carrier, it is necessary to provide a magnetic brush roller similar to that provided in a developing machine, etc., especially in the cleaning device, and a separate drive mechanism is also required. It is.

This poses a problem, especially in the recently proposed cleaning device of the type in which the developer is replaced when it is full, in which case the cleaning device is made into a cassette, since such mechanisms and the like are useless.

Therefore, an object of the present invention is to simplify the mechanism.

[Means for Solving the Problems] The present invention includes a cleaning blade (22) for removing developer (T) remaining on the image bearing member (10) after transfer, and a cleaning blade (22) for removing the developer (T) remaining on the image bearing member (10) after transfer. The cleaning device is based on a cleaning device having a paddle (26) that is sent out to a later stage by rotational operation, and the technical means for solving the above problem in the cleaning device is, first of all, to remove the image carrier (10). Cleaning blade (2) when viewed from the direction of movement
2) is provided with developer adhering means (41, 42) (81, 82) for intermittently adhering developer (T) to the image carrier (10) in synchronization with the rotation of the paddle (26). It is something that Second, a developer retention section (86093) is formed in which the developer m is retained so as to be in contact with the carrier (10) between the inlet of the cleaning device and the cleaning blade (22). It is.

[Function] After the transfer, the developer (T) remaining on the image carrier (10) is scraped off by the blade (22) in the cleaning device.
The developer (T) is delivered to a subsequent stage, such as a developer (T) storage section, by rotation of the paddle (26).

In such a process, in the first method, the developer adhering means (41, 42081, 82) intermittently applies the developer (T) to the image carrier (10) in synchronization with the rotation of the paddle (26).
) to adhere to the surface.

In addition, in the second one, the cleaning blade (2
The developer (T) scraped off by the image carrier (1)
The developer is retained in the developer retaining portions (86) and (93) so as to be in sliding contact with the developer retaining portions (86) and (93).

The yA toner (T) that has adhered or slid onto the image carrier (10) is developed on the image carrier (10), and is supplied as it is to the cleaning blade (22).

[Example] Embodiments of the present invention will be described below based on the drawings.

FIG. 21 shows an example of a device to which the cleaning device according to the present invention is applied, which is a photocopying machine using the Shigeko method.

In order to perform an electrophotographic image forming process around the photosensitive drum 10, which is an image bearing member, a current f&Ia 11, a transfer device 12, and a peeling 11m are installed at the subsequent stage of the exposure position P where light from the scanning system is guided. ] A rotron 13 and a #release claw 14 are disposed, and a cleaning device 20, which is the subject of the present invention, and a static eliminator 15 are disposed downstream of them. Then, the toner image on the photosensitive drum 10 is transferred to the transfer device 1 with respect to the recording sheet supplied via the paper supply path 16.
After being transferred by the action of step 2 and subjected to a peeling action by a peeling corotron 13, the transferred recording sheet is sent to a conveyance path 18 at a subsequent stage.

The basic structure of the cleaning device is, for example, as shown in FIG. 22. This is a cassette type that can be replaced when the developer is full.

In the figure, a housing 21 of the cleaning device 20 is divided into a front part and a rear part, and a toner storage box 27 is configured in the rear part. On the other hand, 1. A cleaning blade 2 is fixed to a bracket 23 on the top of the cleaning blade 2, and its tip slides into contact with the photosensitive drum 10.
2 is disposed, and a cleaning blade 22.2 is disposed in the hollow portion. Therefore, the paddle 2 sends the toner scraped off from the photosensitive drum 10 to the toner storage box 27 at the rear.
There are 6 locations. Further, a toner seal 28 made of a flexible member such as Mylar is fixed at one end to the upper inner wall of the housing 21 and is provided to be pressed against the paddle 26, and is provided to press against the paddle 26. The structure is such that the toner seal 28 separates the toner seal 28 from the hollow portion in which the toner seal 28 is provided. Note that at the lower front end of the housing 21, the portion facing the photosensitive drum 10 is
A sealing member 24 made of Mylar or the like fixed to the bracket 25
is provided to prevent toner from scattering to the outside of the machine.

The paddle 26 has a structure as shown in FIG. 23, for example.

In the figure, a partition body 32 having a cross-shaped cross section is arranged inside a rectangular paddle frame body 31 along its longitudinal direction.
Partition plates 33 are provided at predetermined intervals, and a shaft 34 serving as a center of rotation is provided at both ends of the paddle frame 31 in the longitudinal direction. Note that the drive source (path shown in the figure) for the paddle 26 is shared with the drive source (motor) for the photosensitive drum 10, for example, and
It rotates at a predetermined speed in the same direction as zero.

The present invention is applied to the cleaning device having the basic structure as described above as follows.

- Corresponding to Claim 1 - What is shown in FIGS. 1, 2, 7 to 10, and 12 to 14 are structural examples corresponding to claim 1.

In FIG. 1, the sheet-shaped magnet 42 is made of Mylar,
It is attached to one end of a support plate 41 made of a flexible material such as rotten metal plate, and the other end of this support plate 41 is fixed to a bracket 23 to which a cleaning blade 22 is attached.

This magnet 42 is attached to the support plate 41 and is in contact with the paddle 26, and when the paddle 26 rotates, the magnet 42 tends to move along the outer circumference of the paddle 26, so the rotation radius of each part of the outer circumference is Due to the difference, the support body 41 swings around the fixed end.

As described above, the support 41 which swings as the paddle 26 rotates and the magnet 42 attached to its tip constitute a developer adhering means which is a component of the present invention.

In the above-mentioned leaning device, when the cleaning operation starts, the toner remaining on the surface of the photosensitive drum 10 after transfer is scraped off by the cleaning blade 22, and the scraped toner is transferred to the subsequent toner by the rotating paddle 26. It is sent out to the storage box 27. In the course of such normal operation, the support plate 41 swings in synchronization with the rotation of the paddle 26, and the magnet 42 attached to its tip moves between the closest position and the farthest position with respect to the photosensitive drum 10. performs reciprocating motion at a constant cycle. and,
The toner T scraped off by the cleaning blade 22 is attracted to the magnet 42, and the magnet 42
As shown in the figure, when the toner T reaches the closest position to the photosensitive drum 10, the attracted toner T is transferred to the photosensitive drum 10.
Attach to 0. Here, looking at the surface potential of the photosensitive drum 10, as shown in FIG. (Determined by the material etc. of the photosensitive drum) is distributed so that it is extremely low, whereas the surface potential at the time of entering the cleaning device 20 after being subjected to the discharge action of the transfer device 12, peeling corotron 13, etc. is the same. As shown in Figure (b), the potential of the bright potential portion etc. is raised.

When the photosensitive drum 10 passes through the cleaning device 20 with such potential distribution, the toner that intermittently adheres to the surface of the photosensitive drum 10 is developed due to the reciprocating movement of the magnet 42 that has attracted the toner T as described above. It is provided to the cleaning blade 22 as it is. This intermittent supply of toner T to the cleaning blade 22 stabilizes the frictional state between the cleaning blade 22 and the photosensitive drum 10, and removes rosin, talc, discharge products, etc. attached to the surface of the photosensitive drum 10. Removed along with normal residual toner. Therefore, it is possible to make copies with less image disturbance, dirt, etc.

Furthermore, since the toner in the cleaning device 1220 is intermittently supplied, the load on the cleaning blade 22, which is originally intended to remove residual toner after transfer on the photosensitive drum 10, becomes smaller. It is also advantageous in terms of durability compared to those that are continuously supplied.

Here, the amount of toner reproduced at the cleaning device 20 position should be minimized in terms of the load on the cleaning blade 22, but it is possible to reduce the amount by intermittently supplying the toner T as described above. The amount of development can be adjusted in various ways as follows.

First, the relationship between the amount of development and the electrostatic contrast, that is, the development characteristics, is as shown in FIG. 4, for example.

Therefore, the support plate 41 that supports the magnet 42 described above
By forming the metal plate from a metal plate and controlling the potential of this metal plate (support plate 41), it becomes possible to adjust the development m according to the characteristics shown in FIG. Here, for example, when the supporting plate 41 is set to the ground level, the charged state of the toner adsorbed to the tip thereof also becomes the ground level, and the photosensitive drum 10
The difference between the surface potential and the surface potential (electrostatic contrast) becomes relatively large, and the amount of development also increases.

If the potential of the support plate 41 is set to the opposite polarity to the surface potential of the photosensitive drum 10, the development speed will be further increased.

Next, the toner development level can be adjusted depending on the position of the magnet 42 closest to the photosensitive drum 10 as shown in FIG.

- It is better to bring the magnet 42 with the toner T adsorbed into the film closer to the photosensitive drum 10, but if it is brought too close, it will be strongly influenced by the rotation of the photosensitive drum 10 and the amount of development will decrease. Distance d from the photosensitive drum 10 (second
For example, the relationship between the closest position and the toner ring am as shown in FIG. 5 is as shown in FIG. By changing the distance, the closest position can be adjusted, and thereby the amount of development can be adjusted according to the characteristics shown in FIG. The maximum development m shown in FIG. 5 is obtained, for example, when the nearest position dO is about 1 inch.

Furthermore, the toner ring 1ffi can be adjusted by the shape of the magnetic field formed by the magnet 42 fixed to the tip of the support plate 41. For example, as shown in FIG. 6(a), small magnet pieces 42m, 42(2), 42(3), 42(4),
... are arranged so that the faces facing the photosensitive drum 10 are alternately S and N, as shown in FIG. When the magnet 42 is arranged so that the surface facing the photosensitive drum 10 is S or N alternately, as shown in FIG. The amount of toner present increases in the order of a), (b), and (c).

The image is developed intermittently by adjusting the electrostatic contrast, the position of the magnet 42 closest to the photosensitive drum 10, the shape of the magnetic field formed by the magnet 42, or any combination thereof, as described above. Adjust the amount of development to an appropriate value.

Here, proper development 5 is the minimum necessary amount to the extent that it is effective in improving the frictional state between the cleaning blade 22 and the photosensitive drum 10 and removing foreign matter (rosin, talc, discharge products) attached to the photosensitive drum. It is a stone. These depend on the rotational speed of the photosensitive drum 1o, the material of the cleaning blade 22, the properties of the toner, the contact time of the adhered toe with the photosensitive drum 10 (rotational speed of the paddle), the hardness of the blade, the biting R of the blade into the drum, etc. Decide.

For example, the structure of the magnet 42 is as shown in FIG. 6(C), the surface magnetic field is 100 to 3000 AUSS, and the closest position of the magnet 42 is 1.0. In the case of binding, a development amount of ω0.5/ng/ci was obtained, for example. Note that when a toner containing magnetic powder was used, the amount of development was particularly appropriate.

Other structural examples will be shown below.

In the example shown in FIG. 7, the magnet is directly attached to the rotating paddle 26.

In the figure, sheet-like magnets 43 and 44 are attached to the outer surface of the paddle frame 31 in the longitudinal direction, and another magnet 45 is provided near the top of the paddle 26. Each of the above magnets 43, 44, 45 is the 6th
With a single-sided single pole as shown in Figure (C), the paddle 26 side and the paddle 26 upper side face with the same polarity, and the magnetic force is set so that the magnetic force (43, 44) on the paddle 26 side is larger. has been done.

In such a structure, the toner T accumulated in the cavity formed by the paddle frame 31 and the partition body 32 is rolled up by the rotation of the paddle 26, and the toner T is attracted to the magnet 45 above the paddle 26.

The toner seal 28 pressed against the paddle 26
The toner T that was first attracted to the magnet 44 (43) on the paddle 26 side is scraped off, and then the paddle 26
The toner T attracted to the magnet 45 located at the top is transferred to the magnet 44 on the paddle 26 side due to the difference in magnetic force. The toner T attracted to the magnet 44 (43) is developed on the surface of the photosensitive drum 10 at a position facing the surface of the photosensitive drum 10.

By repeating such operations, toner T is intermittently supplied to the cleaning blade 22.

The example shown in FIG. 8 also includes the paddle 2 rotating the magnet.
It is attached directly to 6.

In the figure, sheet-like magnets 48a, 49a, and 50a are provided at four corners of the paddle frame 31.

51a is attached to the magnets 48b, 49b, and 50b, which are paired with the respective magnets.

51b is rotatably supported at one end thereof. Each magnet 48a, 48b, 49a.

Each of the magnets 49b, . . . has a single-sided single pole as shown in FIG. 6(C), and the surfaces of the multiple pairs of magnets that sandwich the underside of the toner are set to have the same polarity.

In such a structure, when the pair of magnets comes to the lower part when the paddle 26 is rotated (48a, 48b)
The toner that has been scraped off by the cleaning blade 22 is attracted to each surface of the pair of magnets, and when the toner moves to the rear in this state (49a, 49b), the movable magnet (49b) touches the toner seal 28. The toner T on the outer surface of the movable magnet is scraped off by being pressed by the movable magnet, and the toner T is sandwiched between the pair of magnets. Furthermore, even if the paddle 26 rotates and the paired magnets reach the upper position (50a, 50b
), when the toner T is held in the sandwiched state and comes to the front part facing the photosensitive drum 10 (51a, 51b)
, the movable side magnet (51b) rotates due to its own weight, and the pair of magnets becomes open. In this state, the toner T that has been sandwiched between the magnets is developed on the surface of the photosensitive drum 10.

By repeating the above operation, the toner T from the multiple pairs of magnet portions is sequentially developed on the photosensitive drum 10.
As a result, toner T is intermittently spilled onto the cleaning blade 2.
2.

The examples shown in FIGS. 9 and 10 are of a type in which a magnet housed in a space of the paddle 26 moves as the paddle 26 rotates.

The specific structure of the paddle 26 employed in this example is as shown in FIG. 11, for example.

In FIG. 11, paddle plates 55, 56, and 57 are integrally formed on one side of the partition plate 61, and another paddle plate is formed symmetrically with the paddle plate on the other side of the partition plate 61. 58, 59.60 are formed. Between the paddle plates 55 and 56 on the partition plate 61, between the paddle plates 56 and 57, and between the paddle plates 58 and 57 on the other side, and between the paddle plates 57 and 58.
A boss 62 is formed between the two. As described above, one end of each paddle plate 55, 56, 57 is integrated with the partition plate 61, and the other end of each paddle plate 55, 56, 57 is fixed with a screw to the paddle end plate 63, and is also integrated with the partition plate 61. Another paddle end plate 64 is screwed to the other end of each of the other paddle plates 58, 59 and 60, forming a paddle 26 which is an elongated body. A shaft 66 serving as a center of rotation is formed on the outer surface of each of the paddle end plates 63 and 64, while a boss 64 that pairs with each of the bosses 62 is formed on the side of the surface fixed to each paddle plate. There is.

A plate-shaped magnet is incorporated into the paddle 26 having such a structure. Specifically, between the paddle plates 55 and 56, there is a long hole 70a at the end thereof.

The plate-shaped magnet 70 provided with 70b is connected to the elongated hole 7.
A boss 65 formed on the paddle end plate 63 is inserted into the slot 0a, and a boss 62 formed on the partition plate 61 is inserted into the elongated hole 70b, respectively. Similarly, the magnet 71 is between the paddle plates 56 and 57, and the magnet 72 is between the paddle plates 56 and 57.
8 and 59, the magnet 73 connects the paddle plates 59 and 60.
are inserted between each magnet 70.71
72.73 can move forward and backward along the surfaces of the paddle plates sandwiched between them.

In a cleaning device equipped with a paddle 26 having such a structure, as shown in FIG. Internal magnet 70.71. ... are lowered to a position where the boss 62 contacts the ends of the elongated holes 70b, 71b, ..., and the corresponding magnets 70, 71. The toner accumulated in the lower part is absorbed by the tip of the... As shown in FIG. 10, each paddle plate 55, 56, 57 .・
... is in the horizontal direction, the toner seal 28 causes each magnet 70, 71 . ... is pressed, and the magnet moves toward the photosensitive drum 10 to a position where the boss 62 comes into contact with the ends of the elongated holes 70b, 71b, .... At this time, each magnet 70.71. Toner sticker 28 of...
The side pushed by each paddle plate 55°56.57.
...The toner T adsorbed to the tip of the toner T is not scraped off by the toner seal 28 because it sinks inside. The other end of each of the magnets 70, 71, . . . is close to the photosensitive drum 10, and the toner T attracted to the end is developed on the surface of the photosensitive drum 10.

In this way, as the paddle 26 rotates, the internal magnets 70, 71, 73, and 74 repeatedly move forward and backward along the surfaces of the paddle plates sandwiching them, and at this time, the photosensitive drum 10
Since the toner T attracted to the tip of the magnet near the photosensitive drum 10 is developed while being attached to the surface of the photosensitive drum 10, the cleaning blade 22 is intermittently supplied with toner.

In the example shown in FIG. 12, the repulsive force of a spring is used to bring a magnet, which attracts toner, close to the photosensitive drum surface. In this example, the structure of the paddle would be similar to that shown in FIG.

In the figure, sheet-shaped magnets 75 and 77 are arranged to cover the opening of the paddle frame 31, and a spring 76 attached to one end of the magnet 75 connects the corresponding paddle frame 31 and partition 32. The paddle frame 31 and the partition body 32 are housed in a space formed by the paddle frame 31 and the partition body 32, and the spring 78 attached to the end of the other magnet 77 opposite to the magnet 75 has a diagonal relationship with the housing position of the spring 76. It is housed in a space created by

In such a structure, when the paddle 26 rotates, the magnet 75 pushed out by the spring 76 (78)
When the magnet comes to the toner seal 28 position with toner attached to (77), the toner seal 28 pushes the magnet toward the paddle 26 side. At this time, the excess toner is scraped off by the toner seal 28, and when it is removed from the toner seal position, the magnet is again pushed out by the repulsive force of the spring, and in this state it passes a position close to the photosensitive drum 10. At times, the adhered toner is developed on the surface of the photosensitive drum 10. Note that, for example, guides that stand outward are provided at the ends of the magnets 75 and 77 in the paddle axial direction (not shown), and the toner seal 28 comes into contact with the guides when passing through the toner seal position. This prevents the toner attached to the magnet from being completely scraped off. As the magnets 75 and 77 repeat the above operations, the toner T adheres to the surface of the photosensitive drum 10 for development, so the cleaning blade 22 is intermittently supplied with the toner T.

In the example shown in FIGS. 13 and 14, toner is intermittently attached to the photosensitive drum without using the magnet as described above.

In the example shown in FIG. 13, brushes 79 and 80 made of polypropylene, nylon, acrylic, etc. are embedded in the space formed by the paddle frame 31 and the partition body 32 that are in a diagonal relationship at the openings on both sides of the paddle 26. ing. Each brush 79.80
The length of the bristles is set such that the tip thereof slides into contact with the photosensitive drum surface 10.

Furthermore, in the example shown in FIG. 14, porous material 81.degree. 82 such as foamed urethane is used in place of the brushes 79.degree. 80.

In each of the above, when the paddle 26 rotates, the brush 79
．． 80 or the porous material 81, 82 scrapes up the toner T accumulated in the lower part to generate a powder cloud phenomenon, and the toner T floating in the space adheres to the surface of the photosensitive drum 10, and the tip of the brush etc. The toner adhering to the brush or the like when it comes into contact with the surface 10 is developed on the photosensitive drum 10.

In this way, as the paddle 26 rotates, the toner attached to the tip of the brush or the like is developed on the surface of the photosensitive drum 10, and the toner is intermittently supplied to the cleaning blade 22.

The above is an embodiment corresponding to claim 1. According to these embodiments, since the toner in the cleaning device can be supplied to the photosensitive drum 10 using the rotation of the paddle 26 itself, there is no need to provide a particular driving source for toner supply. Furthermore, since toner can be intermittently supplied to the cleaning blade 22, it is possible to minimize the load on the cleaning blade 22 while maintaining the effects of stabilizing the frictional state and removing foreign matter.

- Corresponding to Claim 2 - FIGS. 15 to 20 are structural examples corresponding to Claim 2.

In the example shown in FIG. 15, a sheet-shaped magnet 86 is attached to the opposite surface of the bracket 23 with a spacer 85 interposed therebetween. The tip of the magnet 86 is set to face upstream of the cleaning blade 22 when viewed from the rotational direction of the photosensitive drum 10.

In the example shown in FIG. 16, a sheet-shaped magnet 87 is attached via a spacer 88 to the opposite side of the bracket 25 from which the seal member 24 is attached.

The tip of the magnet 87 is also set to face the upstream side of the cleaning blade 22.

The example shown in FIG. 17 has a structure in which a sealing member 24 is attached to the inside of the apparatus of the bracket 25, and a sheet-like magnet 89 is attached to the outside so that its tip faces the photosensitive drum 10.

In each of the above, each sheet magnet is 86°87.89
The leading end of the toner T acts as a retention area for the toner T. That is, the 15th
16, a part of the residual toner T scraped off from the surface of the photosensitive drum 10 by the cleaning blade 22 is attracted to the tip of the magnet 86, 87, and the attracted toner is transferred to the surface of the photosensitive drum 10. It will be in sliding contact with.

In the example shown in FIG. 17, toner floating near the entrance of the cleaning device is attracted and captured by the tip of the magnet 89.
The toner comes into sliding contact with the surface of the photosensitive drum 10.

In this manner, development is performed with the toner in sliding contact with the surface of the photosensitive drum 10, and the developed toner is particularly supplied to the cleaning blade 22.

In each of the above (Fig. 15, Fig. 16, Fig. 17),
The relationship between the distance d between the tip of the magnet and the photosensitive drum 10 and the amount of development is similar to the characteristics shown in FIG. 5, and the distance l is appropriate in relation to the amount of development! It is decided to be 1do.

In the example shown in FIG. 18, the cleaning blade 2 is inside the photosensitive drum 10 when viewed from the rotational direction of the photosensitive drum 10.
A magnet 90 is provided near the upstream side of 2.

In this example, while the toner remaining on the photosensitive drum 10 after transfer is scraped off by the cleaning blade 22, the scraped off toner T is collected by the magnetic action of the magnet 90, and the toner T remaining on the photosensitive drum 10 near the magnet 90 is collected. 10
It is in sliding contact with the surface. As a result, toner development is performed, and the developed toner is supplied to the cleaning blade 22.

In the example shown in FIG. 19, the sealing member 24 of the bracket 25
The mounting is performed by attaching a plate material 91 made of metal or resin to the opposite surface, and forming a recess 92 by the plate material 91, the bracket 25, and the sealing member 24.

In the example shown in FIG. 20, a plate 93 is provided on the upstream side of the cleaning blade 22 when viewed from the rotational direction of the photosensitive drum 10 as a toner receiver having a cross-sectional shape made of metal or resin.

On each side, the toner T scraped off by the cleaning blade 22 is collected in a plate 93 or a toner receiver formed by a plate 91, a bracket 25, and a seal member 24, and is brought into sliding contact with the photosensitive drum 10. Become. The toner that comes into sliding contact is then developed and supplied to the cleaning blade 22. Incidentally, the excess toner overflowing from the plate 93 falls into the recess 92 or the toner receiver, and is delivered to the toner collection box 27 at the subsequent stage by the rotation of the paddle 26.

The above is an embodiment corresponding to claim 2. In these embodiments, toner can be supplied to the cleaning blade for stabilizing the frictional state and removing foreign matter using a simple structure in which a toner retention portion is formed using a magnet, a plate material, or the like.

Note that in each of the embodiments corresponding to claims 1 and 2 described above, two-component toner is used, but the present invention is not limited thereto, and of course, a -component magnetic toner may be used. This can be realized using a developer in a wide sense such as non-magnetic luna or carrier.

Further, although the cleaning device has been described on the assumption that the entire device is replaced when the toner is full, the present invention is not limited to this type, and can also be applied to ordinary devices. It is possible.

[Effects of the Invention] As described above, in the invention described in claim 1, the developer scraped off from the image bearing member by the cleaning blade is intermittently generated by using the rotation of the paddle to send it to the subsequent stage. Since the toner is made to adhere to the image bearing member again at the same time, there is no need to provide a separate driving source for the mechanism related to toner adhesion. Since the developer is attached to the image carrier by the mechanism, the mechanism is simple and the structure of the cleaning device itself does not need to be particularly complicated. Therefore, it can be particularly effectively adopted, for example, in a so-called cassette type cleaning device, which is a type in which the entire device is replaced when the developer is full.

[Brief explanation of the drawing]

1 and 2 are diagrams showing an embodiment of the invention described in claim 1, FIG. 3 is a diagram showing the state of the surface potential of the photosensitive drum, and FIG. 4 is a diagram showing an example of the development characteristics. , FIG. 5 is a characteristic diagram showing the relationship between the closest position of the magnet to the photosensitive drum and the amount of development, FIG. 6 is a diagram showing an example of the structure of the magnet, and FIG.
14 are diagrams showing other embodiments of the invention described in claim 1, FIGS. 15 to 20 are diagrams showing an embodiment of the invention described in claim 2, and FIG. FIG. 22 is a diagram showing an example of the basic configuration of a device to which the cleaning device according to the present invention is applied, FIG. 22 is a diagram showing an example of the structure of the cleaning device as a premise, and FIG. 23 is a diagram showing an example of the structure of the paddle. [Description of symbols] 10... Photosensitive drum 20... Cleaning device 21... Housing 22... Cleaning blade 24... Seal member 26... Paddle 27... Toner storage box 41... Support plate 42... Magnet 70.71.72.73... Magnet 79.80.
... Brush 81.82 ... Porous material 86.87, 89.90 ... Magnet 91 ... Plate material 92 ... Toner receiver is plate ■ ... Toner patent applicant Fuji Zetsurox Co., Ltd. Agent Man
Patent attorney Tomohiro Nakamura (3 others) T: Toner Figure 2 Figure 3 (a) (b) Figure 4 Electrostatic contrast Figure 6 Figure 7 Figure 8 Figure 10 Figure 12 Figure 15 Figure 86 : Magnet Fig. 17 Fig. 89: Magnet Fig. 18 Fig. 90: Magnet Fig. 19 Fig. 20 Fig. 21

Claims (2)

[Claims] (1) Developer (T) remaining on the image carrier (10) after transfer
) and a paddle (26) that sends out the removed developer (T) to a subsequent stage by rotating operation, when viewed from the moving direction of the image carrier (10). A developer adhering means (41, 42) (81, 82) is provided on the upstream side of the cleaning blade (22) for intermittently adhering the developer to the surface of the image carrier in synchronization with the rotation of the paddle. A cleaning device with special features. (2) Developer (T) remaining on the image carrier (10) after transfer
), and a paddle (26) that sends out the removed developer (T) to a subsequent stage by rotational operation. ) A developer retention section (86) that retains the developer (T) in sliding contact with the image carrier (10).
A cleaning device characterized by forming (93).