JPH02219080A - Cleaning device - Google Patents

Abstract

PURPOSE:To attach a holder without contact with an attaching member even when the holder is formed in condition where it is warped toward the attaching member side by arcuately correcting the attaching member so as to protrude its almost central part and attaching the holder to the projecting part of the attaching member which is circularly corrected. CONSTITUTION:The cleaning device is provided with a bracket 62 as the attaching member in a main body and the bracket 62 is supported turnably via a supporting shaft 63. A weight 64 is attached at the rear end of the bracket 62 by a screw 72, and a cleaning blade 66 is attached at the front end via the holder 65. The bracket is arcuately corrected and the holder 65 is attached at the projecting part 62a of the bracket 62. Thereby, if the holder 65 is warped toward the bracket 62, it doesn't come into contact with the bracket 62. Therefore, the acceptable range of the warp of the holder 65 can be extended and yield improvement, and reduction in the member of stages and in costs are contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Industrial Application Field) The present invention relates to a cleaning device for removing developer and the like adhering to the surface of a photoreceptor of, for example, an electronic copying machine.

(Prior Art) As this type of cleaning device, there is one shown in FIG.

That is, 101 in the figure is a bracket, and this bracket 101 is rotatably supported via a support shaft 102. At the rear end of the bracket 101, fi! 1!10
3 is attached, and a cleaning blade 105 is attached to the front end via a holder 104.

The holder 104 is rotatably attached to the bracket 101 via a fixture 108, and prevents uneven contact when the cleaning blade 105 comes into contact with the photosensitive drum 106, and uniformly extends the axial direction of the photosensitive drum 106. It is designed so that it can come into contact with the

By the way, as shown in FIG. 9, the holder 104 has v
I11 degrees <Jli! In particular, when the holder 104 is molded in a warped state away from the bracket 101 as shown in FIG. 10, the holder 104 does not come into contact with the bracket 10 when the holder 104 rotates.

The cleaning blade 105 can be rotated and can be brought into good contact with the photosensitive drum 106, but since high precision is required, the defective rate is high and production efficiency is extremely low.

(Problems to be Solved by the Invention) As shown in FIG. 11, when the holder 104 is bent toward the bracket 10, the holder 104 comes into contact with the bracket 101 as a defect resulting from the drawbacks of the above-mentioned conventional technology. and cannot be rotated.

For this reason, high accuracy is required for the processing accuracy of the holder, or a washer or the like is added to make the bracket 101.
There is a problem in that it is necessary to create a gap between the holder 104 and the holder 104, which increases the cost.

The present invention has been made based on the above circumstances, and its purpose is to enable the holder to be mounted without coming into contact with the mounting member even if the holder is molded in a state that is warped toward the mounting member. The present invention aims to provide a cleaning device.

[Configuration of the Invention (Rounding Means to Solve the Problems) In order to solve the above problems, the present invention includes a mounting member, a holder rotatably mounted to the mounting member, and a rounding device held by the holder. In the cleaning device comprising a cleaning blade, the mounting member is corrected into an arc shape so that a substantially central portion thereof protrudes, and the holder is attached to the protrusion portion of the mounting member corrected into an arc shape. It is also characterized by a mounting member, a weight attached to one end of the mounting member, a holder rotatably attached to the other end of the mounting member, and a cleaning blade held by the holder. In the cleaning device, the weight is formed into an arc shape, and by attaching the weight to the attachment member, the attachment member is corrected into an arc shape such that a substantially central portion thereof protrudes; The above-mentioned holder is attached to the protrusion of the mounting member corrected into an arc shape, and further includes a mounting member, a nine-spindle attached to one end of the mounting member, and the other end of the mounting member. In a cleaning device comprising a holder rotatably attached to the side and a cleaning blade tractor held by the holder, the weight includes a plurality of laminated plate-shaped weight parts and a weight part that accommodates the weight parts. and a weight case portion formed in an arc shape with a U-shaped cross section, and by attaching and joining the weight case portion to the mounting member, the mounting member is formed into an arc shape with a substantially central portion thereof protruding. The present invention is characterized in that the holder is attached to the protruding portion of the attachment member that has been corrected into an arcuate shape.

(Function) By fixing the arc-shaped weight to the mounting member,
By correcting the mounting member into an arcuate shape and attaching the holder to the protruding portion thereof, the gap between the mounting member and the holder is increased. Therefore, even if the holder is warped toward the mounting member, it will not come into contact with the mounting member.

(Example) The present invention will be described below with reference to an example shown in FIGS. 1 to 7.

Fig. 2 shows the internal structure of the entire apparatus with the third document presser cover open.

Image forming process constituent means 2 such as static elimination and fixing are built in, and an original placing table (hereinafter referred to as a platen glass) 3 on which an original is set is provided on the upper surface.

A platen cover 4 is rotatably attached to the rear edge of the apparatus main body 1 to hold down the original set on the platen glass 3. Copy key to refresh 5. An operation panel 9 is provided with a clear/stop key 6 for stopping the copying operation and canceling the setting state, a numeric keypad 7 for setting the number of copies, and a display section 8 for displaying the operating state, etc. has been done.

Furthermore, a front cover 10 that can be opened and closed is provided on the front of the apparatus main body 1, and image forming process configuration means, ? Paper P such as plain paper supplied to
The paper feed cassette containing the paper is inserted. Further, on the left side of the apparatus main body 1, a tray 12 for collecting fixed sheets P and a power switch 13 are provided.

The image forming fq process configuration means 2 has the following configuration. That is, a drum-shaped photoreceptor 20 serving as an image carrier is arranged approximately at the center of the apparatus main body 1.
Around this photoreceptor 20.

Along the rotational direction, a charging device 21 supplies an ion flow to the photoreceptor 20 to charge it, exposes the document placed on the document mounting table 3, and guides the scattered light to the photoreceptor 20, where it is transferred. an exposure unit 22a of an exposure device jt22 for forming an electrostatic latent image; a developing device 23 for visualizing the electrostatic latent image;
A pre-transfer exposure device f24 for erasing the charge on the photoreceptor 20 outside the image, a transfer device f25 for supplying an ion flow to transfer the image on the photoreceptor 20 to the paper P, and an electric charge on the paper P. Peeling device 26 for erasing. As will be described later, a cleaning device @27. Static eliminators 28 and the like for exposing the surface of the photoreceptor 20 to erase charges are sequentially arranged.

Further, inside the main body 1 of the apparatus, paper P automatically fed from the paper feed cassette 11 or a manual paper feed tray 29 is stored.
The paper P manually fed through the image transfer section 30 between the photoreceptor 20 and the transfer device 25 is transferred to the main body 1 of the apparatus.
A paper conveyance path 3 leading to a tray 12 provided on the left side of the paper is formed.

A pair of registration rollers 32 for aligning the leading edge of the developed image on the photoreceptor 20 with the leading edge of the paper P is arranged on the upstream side of the image transfer section 30 of the paper transport path 31, and on the downstream side, A fixing device 33 and a pair of paper discharge rollers 34 are arranged for fusing and fixing the upper image. In addition, peeling equipment & 2
6 and the fixing device 33 is a conveyor belt unit 35.
is installed.

However, near the mounting section of the paper feed cassette 11.

A take-out row 236 that takes out sheets of paper P one by one, and a transport roller that receives the sheets P taken out through this take-out roller 36 and sends them into a first branch transport path that forms the upstream side of the paper transport path 31. Separation and conveyance means 37 consisting of a separation roller is provided. Furthermore, a manual feeding shear roller 38 is disposed at the confluence of the first branched conveyance path and the second branched conveyance path for manual feeding.

Further, in the exposure device 22, a platen provided on the upper surface of the main body 1 illuminates an original set on a lath 3 with an exposure rung 4 whose back is surrounded by a reflector 40, and the reflected light from the original is emitted. The light is guided to a lens 45 as an optical element through the first mirror 42, the second mirror 43, and the third mirror 44 in order, and then the light transmitted through the lens 45 is guided to the fourth mirror 46 and the fifth mirror 44. mirror 47. The sixth mirror 48 and the slit pass through the lath 49 sequentially to the photoreceptor 20.
It is designed to lead to.

The exposure lamp 4 surrounded by the reflector 40 and the first mirror 42 are mounted on a first carriage 50 whose platen is movable back and forth along the lower surface of the lath 3, and
The second mirror 43 and the third mirror 44
It is mounted on a second carriage 5 which moves in the same direction at half the speed of the carriage 50, and these carriages 50
By moving the platen from left to right in the state shown in FIG. 2 using the carriage shaft 52 etc. as a guide, the platen scans the document set on the lath 3 and touches the photoreceptor 20. The trap is set so that the image corresponding to the original DK is exposed to slit light. Note that the fourth mirror 46 and the fifth mirror 46
The mirror 47 is assembled into a mirror support member 53 and is in a unitized state.

Further, the exposure apparatus 20 configured in this manner is as follows.

It has a unit structure that is integrated into the frame 54, so that the exposure device t2O can be handled as a single unit.

Further, the apparatus main body 1 is divided into two parts, an upper unit and a lower unit IB, with the paper transport path 31 as the border. The upper unit 7A can be opened approximately 25 degrees using the shaft 55 as a pivot point. The support shaft 55
is composed of the shaft of the toshi fourper which constantly biases the upper unit (JA) in the direction of opening.

Further, in FIG. 2, reference numeral 56 is a cooling fan disposed at the top of the fixing device, and reference numeral 57 is a manual feed guide that guides the paper that is manually fed. 58 is a high-voltage transformer, and 59 is a scale that serves as a reference for setting an original.

Next, the cleaning device 27 will be described in detail with reference to FIGS. 1 and 4 to 6.

The cleaning device 27 includes a bracket 62 as a mounting member in the main body 6, and this bracket 62 is attached to the support shaft 6.
It is rotatably supported via 3. A screw 72 and a weight 64 are attached to the rear end of the bracket 62,
A cleaning blade 66 is attached to the front end side via a hole 65. As shown in FIG. 6, the holder 65 is attached to a screw 69 via a spacer 67 and a collar 68.
Therefore, it is rotatably attached to the bracket 62. The length of the leg portion 67m of the spacer 67 is approximately 0.3 fins longer than the plate thickness of the bracket 62, and this difference forms a gap S between the bracket 62 and the holder 65, which prevents the rotation of the holder 65. It makes it possible.

The weight 64 is composed of a plurality of laminated sheet metal plates 70 serving as weight portions, and a weight case 71 having a U-shaped cross section. The weight case 71 is formed into a curved shape as shown in FIG. 7, and the curved surface 71a of the weight case 71 is joined to the bracket 62 and fixed with the screw 72, so that the curved surface 7JA of the weight case 71 is curved. bracket 6
2 is curved into an arc so that its substantially central portion protrudes as shown in FIG. In this way, the protruding portion 62thK of the arc-shaped bracket 62 is attached to the holder 65 by the screw 69.

Due to the weight of the cleaning blade e6u weight 64, the bracket 62 rotates around the support shaft 63, thereby coming into pressure contact with the photosensitive drum 20 and scraping off the residual toner. When the cleaning blade 66 is pressed into contact with the screw 69, the cleaning blade 66 presses the screw 69.
The photosensitive drum 20 is rotated as shown in FIG.

Therefore, residual toner in the axial direction of the photoreceptor drum 20 can be uniformly scraped off, uneven scraping of the residual toner can be prevented, and damage to the photoreceptor drum 20 due to uneven pressure of the anti-slip cleaning blade 66 can be prevented. At the same time, it becomes possible to achieve reliable toner removal.

As described above, in order to correct the bracket 62 into an arcuate shape and attach the protrusion 62hK holder 65 of the bracket 62, the holder 65 is fixed to the bracket 6 as shown in FIG.
Even if the holder 65 is warped toward the second side, it does not come into contact with the bracket 62, and the allowable range of warpage of the holder 65 can be expanded, and yields can be improved, manufacturing steps can be reduced, and costs can be reduced.

In addition, the cleaning blade 66 and holder 65 are consumables and are installed not only when assembling the main body but also during maintenance of the aircraft in the market.
It can be installed without any adjustment without adding washers or the like.

Furthermore, even for aircraft that are already on the market, the bracket 62 can be corrected into an arcuate shape by simply removing the - number of metal plates 70 of the weight 64 and replacing them with the weight case 71.

[Effects of the Invention] As explained above, according to the present invention, since the mounting member is corrected into an arcuate shape and the holder is attached to the protrusion of the mounting member, even if the holder is warped toward the mounting member, the mounting can be performed easily. The allowable range of holder warpage can be expanded without contacting the member, and it is possible to improve yields, reduce process steps, and reduce costs. Furthermore, it is possible to install the cleaning device without any adjustment, without adding washers or the like, not only when assembling the cleaning device but also during maintenance in the market. Furthermore, even for aircraft already on the market, the mounting member can be corrected into an arcuate shape by simply removing one plate-shaped weight part of the weight and replacing it with a weight case, which is extremely convenient.

[Brief explanation of the drawing]

1 to 7 show one embodiment of the present invention, in which FIG. 1 is a vertical view showing a bracket and a holder, FIG. 2 is a schematic longitudinal sectional front view showing an electronic copying machine, and FIG. The figure is a schematic perspective view showing the appearance of the image forming apparatus with the document holding cover open, FIG. 4 is a plan view showing the cleaning device, FIG. 5 is a side sectional view thereof, and FIG. FIG. 7 is a perspective view showing the holder; FIG. 8 is a side sectional view showing a conventional example; FIGS. 9 to 11 are explanatory views showing how various holders are installed. It is. 62... Bracket, 64... Weight, 65... Holder, 66... Cleaning blade, 70... Weight part, 71... Weight case. Takehiko Suzue, Patent Attorney, Figure 1, Figure 3, Figure, Figure, Figure, Figure, Figure

Claims (3)

[Claims] (1) In a cleaning device comprising a mounting member, a holder rotatably mounted to the mounting member, and a cleaning blade held by the holder, the mounting member has a substantially central portion thereof protruding. A cleaning device characterized in that the mounting member is corrected into an arcuate shape, and the holder is attached to a protruding portion of the mounting member which has been corrected into an arcuate shape. (2) A mounting member, a weight attached to one end of the mounting member, a holder rotatably attached to the other end of the mounting member, and a cleaning blade held by the holder. In the cleaning device, the weight is formed into an arc shape, and by attaching the weight to the mounting member, the mounting member is corrected into the arc shape so that its substantially central portion protrudes, and the weight is corrected into the arc shape. A cleaning device characterized in that the holder is attached to a protrusion of a mounting member. (3) A mounting member, a weight attached to one end of the mounting member, a holder rotatably attached to the other end of the mounting member, and a cleaning blade held by the holder. In a cleaning device comprising:
The weight is composed of a plurality of stacked plate-shaped weight parts and a weight case part formed in an arc shape with a U-shaped cross section and housing the weight parts, and the weight case part is attached to the mounting member. A cleaning device characterized in that the mounting member is corrected into an arc shape so that a substantially central portion thereof protrudes by joining together, and the holder is attached to the protruding portion of the mounting member that has been corrected into an arc shape. .