JPS59192277A - Cleaning device of transfer type electrostatic copying machine - Google Patents

Abstract

PURPOSE:To prevent a toner, which is scattered in a cleaning device, from being scattered to the outside of the device to pollute peripheral devices of a photosensitive body, by holding a sweeping member in the upstream side in the moving direction of the photosensitive body at a pressure lower than that in the downstream side. CONSTITUTION:When the first and the second sweeping members 40 and 41 slide on a photosensitive body 16, the inside pressure of a casing 39 is made negative pressure with shield members 101 and 102 of a cleaning device 38 and the first sweeping member 40 by the action of a cooling fan 22. Consequently, the toner scattered in the casing 39 is sucked to the side of the cooling fan 22 from a long hole 44 formed in a rear plate 43 through a through hole 83 and is recovered by a filter 80. Even if the first and the second sweeping members 40 and 41 are displaced upward when the toner blocked with the first and the second sweeping members 40 and 41 is recovered in a developing device 25, the toner is prevented from being scattered to pollute peripheral devices of the photosensitive body.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device for transmission type static copying, and more specifically, the present invention relates to a cleaning device for transmission type static copying, and more specifically, a cleaning device for cleaning a photoreceptor by bringing it into sliding contact with a paulownia photoreceptor during exposure. A transfer-type static copying system that removes residual toner 2 after transfer (a transfer-type static copying system that removes residual toner 2 after transferring 1 ml) As a conventional prior art, a wiping member' is brought into sliding contact with the photoreceptor to block the remaining toner, and then the wiping member is moved away from the photoreceptor by 1 mm to remove the blocked toner. Cleaning device d that is collected according to the 1-ki plan of the currently operating device
There is.

In such a cleaning device, when the toner blocked by the wiping member is collected in the developing device, there is no need to store the blocked toner in the wiping unit (O), so the machine is (The 11th construction is an eye-opener. However, there is the following drawback. When the wiping member is moved seven times to block the toner, the toner scatters inside the cleaning device, making it difficult to wipe it. When member r1.6 was separated from the light body, the toner was scattered outside the cleaning device and contaminated the area around the cleaning device.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cleaning device for a static copying machine that prevents toner from scattering outside the cleaning device.

Hereinafter, implementation (1) of the present invention will be explained with reference to the drawings. FIG. 1 is a longitudinal sectional view of a static transfer type copying machine according to an embodiment of the present invention. The copy paper in the paper feed cassettes 3 and 4 attached to the mortar 2 of the transfer type electrostatic copy bale l is transported by paper feed rollers 5,
6 selectively feeds sheets one by one, and 3 sets of rollers r1 and t3. It is transported by a general transport device 7 having one.

A horizontal transparent plate 8J provided at the bottom of the fuselage 2:
A document 9 is placed, and this document 9 is closely attached to the north of the transparent plate 8 by a holding plate 10. Inside the fuselage 2, there is a partition plate 11
An optical 1A unit 12 is provided in a section E partitioned by. This optical device 2 includes an exposure lamp 13 and a reflecting mirror 1 that efficiently guides light from the exposure lamp 13 to the original 9.
4, and a reflecting mirror 17.18.1 for focusing the optical image of the original 9 on the photosensitive drum 11116L along the optical path 15.
9, a lens 20, a reflecting mirror 21, and r. A cooling fan 22 for cooling the optical device 12 is provided near the left end of the body 2 in FIG.

During exposure, the optical device 12 except for the lens 20 and the reflecting mirror 21 is moved from the left to the right inside the body 2 as shown by the imaginary line. At the end of exposure, lens 2
The optical device 12, excluding the mirror 21, moves in the opposite direction to the exposure movement direction and returns to the body resting position 1a shown by the solid line.

The photosensitive drum surface 1tc16 is exposed to the corona discharger 2.
It is charged by 3. An original image is formed on the charged photoreceptor 16 by an optical device [2] in an exposure area 24, thereby forming an electrostatic latent image. This electrostatic latent image is developed into a toner image by a developing device 25.

This toner image is transferred onto the copy paper 5 conveyed by the conveyance device 7 in the private copying area 26 by the plowing of the roller shifter 27. The copy paper on which the toner image has been transferred is
The movement of the static eliminator 2g28 ensures that it is peeled off from the photoreceptor 16. This peeled copy paper is wrapped around a roller 29,
The winding is driven by an endless conveyor belt 3.
1 and then conveyed to a heat fixing device 32. The heat setting) W device 32 includes a heat roller 34 containing heaters 8Bk+7-I,
A pressure roller 35 and r are provided in pressure contact with the heat roller 34. As the copy paper passes between the heat roller 34 and the pressure roller 35, the toner on the north side of the copy paper is thermally melted and the original image is fixed.

The copy paper that has been fixed is transferred to a pair of paper ejection rollers 36 and delivered to a tray 37. It is discharged at h.

After the transfer process, the photoreceptor 16 is cleaned by a cleaning device 38 according to the present invention. A partition plate 79 is provided between the left end of the cleaning device 38 and the cooling fan 22, and between this partition plate 79 and the above-mentioned partition plate 11, a Scattered toner? FIG. 2 is a cross-sectional view showing details of the cleaning device 38, in which a filter 80 for collection is provided. The cleaning device 38 according to the present invention is disposed between the aforementioned transfer area 26 and the charging corona dispensing device 23 along the moving direction of the photoreceptor 16 shown by the arrow 81 . The casing 39 of the cleaning device 38 includes
The first wiping member 41 is supported by the first wiping member 41, which is movably displaceable when the photosensitive member 40 is close to the light drum. A support part 82 is provided at one end of the swinging lever 42 extending in a horizontal direction substantially perpendicular to one axis of the
The oil VAi of the oscillating valve 42 passes through a long hole 44 formed in the rear plate 43 of the casing 39 extending downward E. On the other hand, , the second wiping member 41 is fixedly provided at one end of a swinging lever 45, which is arranged substantially parallel to the swinging lever 42, via a support portion 46.The second wiping member 41 is slightly thinner than the first wiping member 40.
Through holes 83 and 84 are formed in each of the support member 46 and the support portion (O 82). A magnetic adsorption means 99 is provided to prevent the K16 from being scratched.Furthermore, the casing 39 is provided with a magnetic adsorption means 99 to prevent toner from scattering from each gap between the casing 39 and the photosensitive film 16. Sealing lever members 101, 102, 108 (see FIG. 4) are provided.The other end of the swinging lever 45
2, it passes through the elongated hole 44i. Swing lever 42°45
is rotatably supported by rotating shafts 47 and 48 parallel to the axis of the photosensitive drum, and approximately at the center of the shafts 47 and 48. The other end of a spring 51, one end of which is connected to a protrusion 50 provided on the edge plate 49 of the casing 39, is connected to the end of the swing lever 42 outside the casing 39. Close to this spring 51, the swing lever 42 and the swing lever 4
A spring 52 is connected between 5 and 5. Long hole 44 of swing lever 42? The penetrating portion is formed to have a large diameter.

'@3 Figure is a view of the cleaning device 38 in Figure 2 seen from behind, Figure 4 is a perspective view of the main part of Figure 3, and '@5 Figure is a cross-sectional view of Figure 3. It is a sectional view seen from v-■. Behind the rear plate 43 of the casing 39, a first arm 53 and a second arm 54 are rotatably supported on a pin 55 provided on the rear plate 43 at a distance r from the rear plate 43. As shown in FIG. 4, most of the second arm 54 has a lower portion 53 that is large enough to be accommodated in the second arm 54; similarly, it is formed into a frame shape that is open downward. '4S l
The arm 53 is housed in the second arm 54 and is rotatably supported around a pin 55.

The second arm 54 extends over half the length of the casing 39 in the longitudinal direction of the casing 39 (in the left-right direction in FIG. 3), and the first arm 53 is attached to the pin 55.
, extending for 45 years. The end portion 56 of the @l arm 53 is screwed into the regulating portion (57th screw 58).

As shown in FIG. Amount?Regulates.Regulation part (No. 57 is a long hole 59r extending in the direction).
The position r of the attachment to the frame 53 can be adjusted. One end of a spring 6o is connected to the first arm 53, and the other end of the spring 6o is connected to the end of the screw member 61 that is defeated by the second arm 54. 27th-me 54. A roller 62 is rotatably supported at the end. The end of a swinging arm 4 which is rotatably displaceable around a pin 63 comes into contact with the roller 62 . A hollow arrow 5 is provided at the other end of the swing arm 64 and is driven by a cam 66.

The cam 66 and the single windmill 67 have a 141 claw 68 and a second claw 69 as shown in Figure @5. The wax cam 66, which is rotatably driven around the shaft 85 by power from a drive source (not shown), has a large diameter cam surface and a small diameter cam surface. 1st
The retaining member 70, which can be freely engaged and detached from the pawl 68 and the second pawl 69, can be moved angularly around the support 72 together with the connecting member 71, which is integral with the retaining member 70. In the middle, it is pin-coupled to a plunger 75 of a solenoid 74 by a pin 73 . The free end of the connecting portion +A'71 is tied to one end of the spring 76. The other end of this spring 76 is connected to a protrusion 78 on a fllll wall 77.

In this example, photosensitive hx6, cleaning device front 38
The unit 1 is inserted into the developing device 25' and can be pulled out perpendicular to the plane of the paper with respect to FIG. The structure is such that one movement from the machine body is transmitted through the engagement of the roller 62 and the swinging arm 64. Figures 2, 3, and 5 show no cleaning during non-exposure. situation? 1mr, when the solenoid 74 is demagnetized, the spring 76
The f base member 70 is engaged with the @l claw 68 due to the spring force, and the hollow arrow 5 is in contact with the small diameter cam surface of the cam 66 due to the force of the spring 51, which will be described later. With respect to 63, the portion of roller 62 fltll is turned toward L (iW).

On the other hand, as shown in FIG. 2, the swinging lever 42 is positioned downward around the pivot shaft 47 due to the spring force of the spring 51.
At this time, the large diameter portion of the swing lever 42
The regulating member 57 pushes down the swing lever 45i. At this position of the swing lever 42, there is a gap w between the first wiping member 40 and the photosensitive member K16.
1 is formed. In addition, at this position of the swing lever 45, there is a gap W2 between the second wiping member 41 and the photoreceptor 16.
is formed. First wiping member 40 and 1/δ principal 16
A gap W1 having a shape 1 between the first wiping section 1 and the first wiping section 1,
It is defined by the contact between the adjustment member 86 provided on the two casings 39 of 1' 40 and the northern part of the holding part (O 88) held by the support member 82 on the first wiping part cover 40. A gap W2 between the second wiping section 41 and the photoreceptor 16 is formed by a regulating plate 87 provided on the rear plate 43 of the casing 39 and a support member 4 supported on the second wiping section 41.
It is defined by the contact of the buttocks extending in the F direction at the rear plate 43 of 6. The end portion 56 of the first arm 53 is positioned downward due to the large diameter portion of the swing lever 42, and the roller 62 portion of the swing assist arm 64 is moved downward via the spring 60 and the second arm 54. on the F side (standing 18!,
are doing.

FIG. 6 is a sectional view corresponding to FIG. 2 at the time of exposure, that is, cleaning, and FIG. 97 is a view corresponding to FIG. 53. During cleaning, the solenoid 74 is energized and the plunger 75 is raised in the direction 'f' (h). As a result, the connecting portion 1 off 1 pin-coupled to the plunger 75 is angularly displaced around the shaft 72 against the spring force of the spring 76. and the connecting part side 71 and a group of engaging members 7 (1- is the first claw 68
depart from. As a result, the lower weight 67 rotates 180 degrees clockwise in FIG. 5 and engages with the second pawl 69. This 18
By rotating by 0 degrees, the hollow arrow 5 comes into contact with the large diameter cam surface of the cam 66, and the swinging arm 64 rotates downward around the pin 63 to the roller 62 of the second arm 54. This causes the second arm 54 to move angularly around the pin 55, and the spring 60 causes the QT
, the 1st arm 53 connected to the 2-y-m 54 moves northward. As the first arm 53 is displaced northward, the end portion 56 of the first arm 53 pushes the large diameter part of the swinging lever 42 north against the spring force of the spring 51, and the swinging lever 4.27 Rotation! The first wiping member 40 touches the surface of the photosensitive plate 16. When the swing lever 42 is pushed down, the swing lever 45 is also moved by the spring 52. As a result, the second wiping member 41 comes into sliding contact with the surface of the photoreceptor 16 .

Note that the swing lever 45 is moved by the force of the spring 52 to prevent the regulating portion (
'A' 57 and the end 56 of the first arm 53? It then moves northward with the swing lever 42, but after the 2nd wiping part 41 comes into contact with 1% light 1 (16), it moves away from the regulating part (57th). The toner remaining on the photoreceptor 16 after exposure and the gear that has flown out from the developing device together with the toner should not be removed and the shield H-shaped 10 should be removed.
The residual toner and carrier pass through the jolt on the shield part side.Then, the carrier is attracted by the magnetic plate II means 99 on the way, and the toner is removed. chisel spring 5
2.1] The second wiping member 41 that receives the yoke is blocked and leveled. Next, '@2 wiping part + g'
/ l l v The toner that has been smoothed and smoothed by the trowel is removed from the 1st wiping section (contrary to the fact that it is 40 years old) than the 2nd wiping section (41). One photosensitive tube 16 is surely wiped away and blocked.

In the cleaning device 38, the first wiping section 1'J
The i40 and the second wiping part 41 come into sliding contact with the photoluminescent body 16. The sliding contact pressure of the first wiping section 40 against the photoreceptor 16 is defined by the spring 60, and the sliding pressure k of the first wiping section 40 is determined by the spring 60.
The sliding pressure on the wiping member 16 is determined separately by the spring 52, and the first wiping member 40 and the second wiping member 40 are applied at different times. 4.7.
48 is provided at the rotation mark, and 1 from the drive source at the rear of the fuselage.
By interlocking the two wiping parts (O) with one input, it is possible to make contact with and separate from the photosensitive material 16.
The upper blade of the Mfl blade can be adjusted.

When the cleaning is completed, the solenoid 74 is demagnetized, the ready member 71 rotates around the support 72 against the spring force of the spring 76, and the i-joint part (the retaining part integrated with the OFF 1) is connected to the OFF 0.
The second claw 69 also rotates and separates from the second claw 69. This causes the claw 67 to rotate 180 degrees and engage the first claw 68 . Contrary to this rotation, the hollow arrow 5 comes into contact with the small diameter cam surface of the cam 66, and the swinging arm 64 is displaced northward and returns to the state shown in FIGS. 2, 3, and 5. spring 51
Due to the spring force, the swinging lever 42 moves downward around the rotating shaft 47, and at this time, the large diameter portion of the swinging angle <-42 pushes the end 56 of the first arm 53 downward. Kon
Accordingly, the regulating member 57 swings 1/bar 45? The first wiping member 40 is moved by the downward displacement of the first swinging lever 42.
A gap Wl is again formed between the 1st wiping light body 1 and the 1st light body 6, and when the swing lever 45 is pushed down, the 2nd wiping 1↑ls4th 41st and 1・δ light body 16 A gap ν~12 is formed between the swing lever 42 and
When the end portion 56 of the first arm 53 is pushed down by the large portion of the ? The state returns to the state in which the hollow arrow 5 is compressed by the cam 66.

When the first wiping section (40) and the second wiping member 4I are separated from the photoreceptor 6, the residual toner that is stopped is brought to the first wiping device 25 shown in FIG. 1 for development. It is collected by the magnetic blank of device 25.

Cleaning device according to the present invention: (In the jf, (g) 1 and the second wiping part 4 (1, 4, 1 are attached to the j.
When they are in contact with each other, one movement of the cooling fan 22 as shown in FIG. l: Negative B inside the casing 39
It becomes three.

Then, the toner remaining in the casing 39 passes through the shell d hole 83 and is formed in the rear plate 43 [through the hollowed hole 44].
The rill 1 and the second wiping member 40 are sucked by the cooling fan 22 and collected by the filter 80.
When collecting toner blocked by 41 into the phenomenon device 25, 12 and second wiping, 'AI + vice 40.
Even if it is displaced in the 4iirh direction, is there a + rope around the IiMJ of the photosensitive drum 16 such as a loading device? I'm going to contaminate it. In this example, a fan for cooling the optical device is used to cool the inside of the cleaning device's casing. Although negative pressure is provided, in another embodiment, a fan for a cleaning device may be connected inside the casing via a duct.

According to the present invention, the wiping part is scattered on the north side of the moving direction of the photoreceptor (the 1τ flow (because the pressure is maintained at a lower level than the opening 11), the wiping part is scattered inside the cleaning bag. The 1-ner is prevented from contaminating the surrounding area of the cleaning device by complementing it outside the cleaning device.

[Brief explanation of the drawing]

:1r, Figure 1 is a longitudinal (cross-sectional view, second
Is the diagram details of the cleaning device 38? 1iJr side view shown,
3 is a view of the cleaning device 38' in FIG.
Figure 5 shows the 1 new 1. ffi diagram, ::r< Figure 6 is a 1-fold view corresponding to FIG. 2 during cleaning, and FIG. 16... Photoreceptor, 38... Cleaning device, 39
...Casing, 40...First wiping section visit, 41...
・Second wiping unit, 42, 4.5... Swing lever, 53
...1st arm, 54...27th arm, 66...
Cam fee Il 1 person Patent attorney Kei Nishikyo Partial procedure supplement -;! 4 (-b type) October 1980 110 Special i71 Agency'1°) Tono 1, 111 Table 4, j L9Ji Showa 5f: '7°719 '7n,
Translated title of the invention No. 1 type electrostatic compound cleaning device No. J, the person making the amendment! Relationship with 10'1 Applicant Name (G] 5) 1;-1-11 Jōgye Kazushu 1.1, Dai J Rijin lj: +sui 1 Nishiki-cho, Nishi-ku, Osaka-shi=l'l]1
No. 3 No. 38 Hiruaki from Shinko + II ”,) 8 Il!]
J'l 27 B (Shipping date) 0, Sleeve 11: λ・] Elephant Drawing 7, Contents of Sleeve 531-

Claims (1)

[Scope of Claims] A wiping unit (O) disposed on the upstream side of the corona discharger for irradiation along the direction of movement of the photoconductor is brought into sliding contact with the photoconductor during exposure, and removes residual toner on one photoconductor. A cleaning device for an L-type copying machine in which residual toner is collected by a magnetic brush of a developing device by separating it from the wiping member r and a photoreceptor blade. At least when the wiping member slides onto the photoreceptor, the wiping member is maintained at a lower pressure (L) in the direction of movement of the photoreceptor than the downstream side, and -11 flow +11
11. A static iα type copying machine characterized in that: 1) the toner that has been blown away in the iJ recording and cleaning member is prevented from scattering to the downstream side when it is 1 inch from one photosensitive line of the iJ recording and cleaning member; Machine cleaning equipment.