JPS58182649A - Copying machine - Google Patents

Abstract

PURPOSE:To make maintenance easy, by holding an exposure lamp to the housing of a corona charger, forming the corona charger and an exposure lamp to one body, and making the same freely attachable and detachable to and from the body of a copying machine. CONSTITUTION:If the operator holds the knob part 84 of a plate 81 with the fingertips and pulls the same toward him, a corona charger 71 and an exposure lamp 10 can be pulled integrally from the body of a copying machine, and if the operator deviates a sliding plate 86 slightly in the inside direction opposite from an arrow C against the force of compression springs 87A, 87B, a control grid 78 can be removed easily from a housing 72. If the plate 81 is engaged with the plate 43 and is pushed in while the housing 72 is held mounted with the lamp 10 with a base plate 75, the charger 71 and the lamp 10 can be mounted integrally to the body of the copying machine. A control grid 73 is also mountable to the housing 72.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine having a corona charger and an exposure lamp arranged close to each other in the vicinity of a photoreceptor.

As an example of a conventionally proposed MV machine, an exposure lamp and a corona charger are placed close to each other near the photoconductor, and after the photoconductor is neutralized by lighting the exposure lamp, it is uniformly charged by the corona charger. However, there are some devices in which the original image is then irradiated to form an electrostatic latent image corresponding to the original image on the photoreceptor. Figure 1 shows the configuration of one example of the InF 3 machine. By repeatedly performing toner development and transfer on an electrostatic latent image once formed on a photosensitive drum, the same copy is sequentially printed on multiple sheets of recording paper. It is designed to be able to form images. In FIG. 1, when the sheet-like continuous shooting l is placed on the inclined document table 2 and inserted into the document feeder 8 from the direction of the arrow M, the document feed roller pair 4 and the document feed roller pair 4 constituting the document feeder 8 are inserted. w, II The sheet is conveyed while being held by a pair of sheet discharge rollers 6, and is discharged onto the original tray 6. The document 1 is conveyed between the paper feed roller pair 4 and the paper discharge roller pair 6 and is illuminated by an illumination lamp 7, and the document image is projected onto a rotating photosensitive drum 9 by a SELFOC lens array 8. The photosensitive drum 50 rotates in the direction of arrow B, and after the residual charge is removed by lighting the exposure lamp 10, it is uniformly charged by a corona charger 11 called a rotron having a control grid, and then the above-mentioned optical image is charged. By receiving irradiation, an electrostatic latent image corresponding to the original image is formed. The electrostatic latent image on the photosensitive drum 9 is transferred to a dry two-component developing device 12.
After the toner is developed by the photosensitive drum 9, the toner image is transferred to the toner image transfer section 18 as the photosensitive drum 9 rotates.

On the other hand, the recording paper 15 in the recording paper cassette 14 is taken out one by one by the swinging and rotating pickup roller 16, passes through a guide 17m, a pair of register rollers 18, and a guide 17B, and then passes through a guide 17m, a pair of register rollers 18, and a guide 17B. The toner image is sent to the toner image transfer section 18 at a predetermined timing when the leading edge of the upper toner image coincides with the toner image. Toner image transfer $W618
, the recording paper is conveyed in contact with the photosensitive drum 9 so as to overlap with the toner image, and here the recording paper is conveyed by the bias transfer roller 1.
You can enjoy toner image transfer by the action of 9.

The recording paper that has passed through the toner image transfer section 18 is peeled off from the photosensitive drum 9 by a peeling claw 21 and an air flow to be described later, and sent through a guide 170 and a pair of conveying rollers 28 into a heat fixing device 24 having a heater, where it is After fixing the toner image, the toner image is discharged onto a copy tray 26 by a pair of discharge rollers 25.

The remaining toner on the photosensitive drum 9 that has passed through the toner image transfer section 18 is removed by a rotating cleaner brush 27, and the removed toner is sucked by an air flow generated by the rotation of a fan 28 and collected by a filter 29. Ru. The cleaner brush 87 and the fan 28 are covered with a housing 80 in order to obtain an effective toner suction force and to prevent the toner from scattering within the device, and the exhaust of the fan 28 is provided through an exhaust port facing the toner image transfer section 18. The recording paper is ejected from the photosensitive drum 9 and is used in cooperation with the peeling claw 21 to effectively peel the recording paper from the photosensitive drum 9. The cleaner brush 87 is rotatably attached to an arm 88 rotatably provided around a support shaft 82, and repeatedly performs toner development and transfer by repeatedly using the electrostatic latent image once formed on the photosensitive drum 9. ll
! When toner images are sequentially transferred onto several sheets of recording paper, the distance between the photosensitive drum 9 and the photosensitive drum 9 is 4.

A trimming lamp 84A is provided near the periphery of the photosensitive drum 9 between the light image irradiation position and the development position.

84B is arranged, and the recording paper 1 used on the photosensitive drum 9
[It is configured to erase charges in a portion that does not correspond to 1, that is, a blind area. The operations of the above-mentioned parts are as follows:
# established after J! The first original detection switch 85 and the second
The control is performed based on the detection of the document position by the document detection switch 86 .

FIG. 2 shows the specific structure of the exposure lamp 1° and corona charger 11 of the IIv machine shown in FIG. The corona charging gill has a corona frame 41 and a corona case 42. The corona frame 41 is detachably attached to a support plate 48 provided on the main body of the compensator, and the corona case 42 is fixed to the support plate 48. An exposure lamp 10 for erasing residual charges on the photosensitive drum 9 by exposure is held by a corona nurse 42 and is installed in a chamber 44 formed in a corona case 42.
The photosensitive drum 9 is uniformly exposed through the photosensitive drum 9. Further, the cell 7 cleaning lens array 8 is fixed to a mounting surface 45 formed on a support plate 48, and between its output end and the photosensitive drum 9 are protrusions 46 formed on the rollers 42, A diaphragm mechanism is formed by the trimming device casing 47 having trimming lamps 84 and 84B (see FIG. 1).

Next, detailed configurations of the corona frame 41 and the corona case 42 will be described with reference to an exploded perspective view shown in FIG. The corona frame 41 has an insulating plate 51 that is detachably attached to the support plate 48 and extends in the axial direction of the photosensitive drum 9. A corona wire 54 is installed between the pillars 52 and 53. The corona wire 64 is fixed to the plate 51 via a spring 55 at the support 52, and is hooked to a conductive hook 68 connected to the terminal 67 of the electrode part i6 at the support 58. , are held with appropriate tension between the columns 58 and 58 by the action of the spring 55. On the other hand, the corona case 42 has an opening 61 that faces the photosensitive drum 0 and extends in its axial direction, and a mesh-like control grid 62 is fixed to the opening 61 so as to cover it. This control grid 62 is =+
It is electrically connected to a terminal 64 of an electrode section 68 provided at one longitudinal end of the inner case 48 . Further, as described above, this corona case 42 has a holder f! for holding the exposure lamp 10 at its longitudinal end. ! 665 is formed, and a window 44 for guiding erasing light from the exposure lamp 10 held by the holder portion 65 to the photosensitive drum 9 is also formed.

However, in the above-mentioned multiplex machine, a corona case 42 having six protrusions 46 constituting the aperture mechanism of the cell 7 oxygen lens array 8 is fixed to the main body of the wV machine, and a holder formed on the corona case 42 is fixed to the main body of the wV machine. Since the exposure lamp 10 is housed and held in the section 66, cleaning the SELFOC lens array 8 is extremely time-consuming, and replacing and cleaning the exposure lamp 10 is also extremely time-consuming.

An object of the present invention is to solve the above-mentioned problems and to provide a duplex machine suitably configured to facilitate maintenance such as maintenance and inspection. In a copying machine having a corona charger and an exposure lamp arranged in close proximity, the exposure lamp is held in an outer casing of the corona charger, and the corona charger and exposure lamp are integrally attached to and removed from the copying machine main body. It is characterized by being able to be worn freely.

Hereinafter, a case in which the present invention is applied to the copying machine shown in FIGS. 1 and 2 will be described in detail with reference to the drawings.

Fig. ig4 shows an example of the configuration of the essential parts of the copying machine of the present invention. In this example, the entire corona charger 71 is removably attached to a support plate 48 provided on the main body of the copying machine, and
A mesh-like control grid 78 is detachably attached to the outer case 72 of the fluora charger fan 1. Further, the outer casing 72 is formed with a protrusion 74 that cooperates with the trimming device casing 47 to constitute the aperture mechanism and dirt prevention mechanism of the SELFOC lens array 8. Attach the exposure lamp 10 via 5. In this example, the outer periphery of the exposure lamp IO is covered with a blue filter 76 made of silicone rubber or the like.

Next, the specific structure of the corona charger 71 shown in FIG. 4 will be explained with reference to the perspective view shown in FIG. 2 and the partial detailed view shown in FIGS.

The outer casing 72 has an insulating plate 81 that is detachably attached to the supporting plate 1δ and extends in the axial direction of the photosensitive drum 9. Insulating slide supports 82 are provided at both longitudinal ends of the plate 81, respectively. A grid support 88 is attached, and a grip portion 84 is formed at the end on the side where the slide support 82 is provided. There are 86 side plates each between the slide support 82 and the grid support 88 at the widthwise end of the plate 81.

85B are provided in parallel along the length direction, and one side plate 85
A protrusion 74 that constitutes the aperture mechanism and dirt prevention mechanism of the SELFOC lens array 8 is formed on the other side plate 85.
A substrate 75 holding an exposure lamp 10 covered with a blue filter 76 is fixed to B. A slide plate 86 is provided on the slide support 82 so as to be slidable in the length direction of the plate 81, and biased in the outward direction indicated by arrow 0 by a pair of compression springs 87A and 87B. This slide plate 86 has a pair of pins 88A, 8
8B and by engaging these pins with a pair of openings (not shown) formed corresponding to one end of the control grid 78, one end of the control grid 78 can be detachably attached to the slide plate 86. Hold. Further, a pair of conductive pins 89 and 89B are similarly provided on the grid support 88, and these pins are engaged with a pair of openings (not shown) formed corresponding to the other end of the control grid 78. As a result, the other end of the control grid 18 is detachably held on the grid support 88. Therefore, the control grid 7δ is detachably held by the grid support 88 and the slide plate 86, and the slide plate 86 is supported by the pair of compression springs 81 and 87.
Because it is biased outward as shown by arrow O due to the action of B,
It is constructed between the slide support 82 and the grid support 118 with appropriate tension. The pins 89 and 89B are electrically connected to terminals 92 of an electrode portion 91 provided on the -C1 grid support 88 via a conductive member 90 provided within the grid support 88.

On the other hand, the slide support Sg of the plate 81 and the grid support 8
8 is installed by providing support columns 95 and 96 near the positions, and corona wires 97 are installed between these support columns. This corona wire 97 is connected to the spring 9 at the column 95.
8 and is electrically connected to the terminal 101 of the electrode section 100 provided on the grid support 88 through a conductive and elastic 7 hook 99 at the support 96 portion. In this example, in order to improve the pressure resistance between the pole parts g1 and 100, a step 8δB is formed on the mounting surface 8δ of both electrode parts of the grid support 88 to reduce the distance between the mounting positions of both electrode parts. Lengthen.

In the embodiment described above, by holding the tab 84 of the plate 81 with your fingers and pulling it toward you, you can remove the corona band IE device 71 and the exposure lamp 10 from the main body of the 614 machine, and also remove the slide plate 86. The control grid 78 is deflected slightly inward in the direction opposite to the arrow C against the force of the compression springs 87 and 87B.
It can be easily removed from the I'm outside again! l! Plate 8 with the direct light lamp lO attached to 72 via the board 15.
1 by engaging the support plate 48 and pushing it in.
Rona electrification! 1171 and the exposure lamp 10 can be integrally mounted on the protection machine body, and the slide plate 86
is biased inward against the force of compression springs 87 and 87B, and in this state slides a pair of openings (not shown) formed at both ends of control grid 78.
and a pair of bins 88 respectively provided on the guide support B8.
By engaging with M, 88Bi89 M, and 89B,
Remove control grid 78! l! It can be installed on 7ji.

Therefore, control grid during maintenance?
δ and the exposure lamp 10 can be replaced and cleaned in a harsh manner, and the selfoc lens array 8. ) can be cleaned easily because the white space around it is widened. In addition, since the control grid 78 is constructed with a moderate tension due to the action of compression springs 87 and 87B, it can always maintain a flat surface without deforming even when the ambient temperature changes, so that the charging action is always constant. Since the image quality can be maintained at a high level, there is no adverse effect on the copied image.

Note that the present invention is not limited to the above-mentioned example, and can be modified or changed in many ways.

For example, in the example described above, the control grid 78 is
6, a pair of compression springs 81 and 87B were used to apply a suitable tension to the construction, but instead of the compression springs, a sponge 110 was used as shown in FIG. 7, and its elastic force caused the sliding plate 86 to It is also possible to apply tension to the control grid 78 through the control grid 78, or as shown in FIG.
The control grid 18 can also be constructed with an appropriate tension by detachably attaching one end of the control grid 8 to a support 112 provided on the plate 81 via a tension spring 111. Further, as shown in FIG. 9, a leaf spring 118 is provided on the plate 81, and one end of the control grid 78 is removably engaged with the leaf spring 118, so that the restoring force of the leaf spring 118 causes the control grid 78 to move to an appropriate level. It can also be constructed with a tension of In particular, in the case of FIGS. 8 and 9, the number of parts can be reduced, and II configuration can be easily achieved. Also, the control grid 78
are not limited to mesh-like shapes, but extend parallel to each other *
It is also possible to use a conductive wire made of solid conductive wire. Furthermore, the corona charger is limited to one called a scorotron which has a control grid; however, a fluorostatic charger called a corotron without a control grid can also be used. Furthermore, the present invention can be effectively used when corona charging is performed while an exposure lamp is turned on to eliminate or uniformly charge a photoreceptor.

As described above, in the present invention, the corona band IIv outer casing for charging the photoreceptor holds an exposure lamp for exposing the photoreceptor placed close to the corona charger, Since the fuse charger and exposure lamp are integrally attached to the main body of the copying machine in a detachable manner, maintenance and inspection such as replacement and cleaning of the exposure lamp and cleaning of the inside of the machine can be easily performed.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of an example of a 114 aircraft that can implement the present invention; Fig. 2 is a diagram showing the specific configuration of the conventional main parts of the Il aircraft shown in Fig. 1; 2 is an exploded perspective view showing the specific structure of the corona charger shown in FIG. 2, FIG. 1 is a diagram showing the structure of an example of the essential parts of the copying machine of the present invention, and FIG. 5 is the corona charger shown in FIG. 4. A perspective view of the external appearance of the charger, FIG. 6, B, and O are partial detailed views, and FIGS. 7, 8, and 9 are eight other examples of the corona charger used in the Il-carrier of the present invention. 2 is a diagram showing main parts of each. 8...Self-occurrence array 9...Photosensitive drum 10...Exposure lamp 80
...Housing 48...Supporting plate 47...
Trimming device casing 71...Corona charger 72...Outer box 78...
・Control grid 74...Protrusion 7b...Substrate
76... Blue filter 81... Board
82...Slide support 83...Grid support 84...Knob portion 85m, 86B...
Side plate 86...Slide plate 87mm, 87B...
・Compression spring 88mm, 88B, 89mm, 89B...Bin 90...
Conductive member 91... Electrode part 92... Terminal
95.96... Support 97... Corona wire 98... Spring 99... Hook
100... Electrode part 101... Terminal
110...Sponge 111...Tension spring
l12... Support 118... Leaf spring. Figure 2 Figure 3 Figure 4 Figure 6

Claims (1)

[Claims] 1. In a wV machine having a corona charger and an exposure lamp that are arranged close to each other in the vicinity of the photoreceptor, the exposure lamp is held in the outer casing of the corona charger, and the corona charger and the exposure lamp are connected. A copying machine characterized by being detachably attached to a vIv machine body as an integral part.