JPS62125377A - Image forming device - Google Patents

Abstract

PURPOSE:To automatically clean a corona discharging means and to always maintain a clear picture by arranging the corona discharging means at the lower part of an enclosure so that a guide rail can interlock to the detaching action of the enclosure and a supporting means can be slid. CONSTITUTION:At the time of mounting the enclosure 12, the projected piece 23a of a supporting body 23 is engaged at the edge part of a guide rail 24, the case 12 is pushed in the A direction of an arrow into the internal part of a main body 1, and then, accompanying it, the supporting body 23 is guided and shifted to the recessed part of the guide rail 24 and arrives at the position shown by a full line together with the completion of the mounting of the enclosure 12. At such a process, a pad 22 slides the surface of a discharging wire 8a and the inner surface of a case 8b and removes the stuck dust and dirt. At the time of detaching the enclosure 12, the projected piece 23a shown by the broken line is engaged at the edge part of the guide rail 24 again, the enclosure 12 is pulled out to the external part of the main body, and then, the supporting body 23 is guided and shifted by the guide rail 24 and arrives at the position shown by the full line. At such a time, the surface of the discharging wire 8a and the inner surface of the case 8b are cleaned by the same way.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates primarily to an image forming apparatus used as a copying machine.

(B) Conventional technology Conventionally, in this type of image forming apparatus, a corona discharge means (main charger) is mounted on a casing that is detachably attached to the main body, and an opening is provided in the casing near the corona discharge means. After the housing is removed, a cleaning tool is inserted through the opening to clean the electric wire of the corona discharge means, the case, etc. (see, for example, Japanese Patent Laid-Open No. 59-34545).

(c) Problems to be Solved by the Invention However, in such a conventional image forming apparatus, the corona discharge means for transfer (transfer charge 11), etc.
Since it is difficult to arrange the device integrally with the housing, it is generally fixed within the main body, and therefore, there is a problem in that it is not easy to clean.

The present invention has been made in consideration of such circumstances, and provides an image forming apparatus in which a corona discharge means installed on the main body side is automatically cleaned when the casing is attached or detached.

(d) Means for Solving the Problems This invention provides a main body equipped with an image forming means including a corona discharge means and a casing which is provided with an image forming means including a photoreceptor and is detachable from the main body in the axial direction of the photoreceptor. In the image forming apparatus, the cleaning means contacts the surface of the discharge wire of the corona discharge means and/or the inner surface of the case, and the case of the corona discharge means supports the cleaning means and is slidable in the direction in which the discharge wire is stretched. A guide rail is provided on the bottom surface of the casing in a substantially straight line with a predetermined inclination with respect to the mounting/detaching direction of the casing, and is capable of engaging with a part of the supporting means, and This image forming apparatus is characterized in that two discharge means are disposed at the bottom of the casing so that the guide rail slides the support means in conjunction with the attachment/detachment operation of the casing.

In addition, as a cleaning method, felt, maltblen,
Materials such as sponge are used.

(e) Operation The corona discharge means is arranged so that the direction in which the discharge wire is stretched is parallel to the axis of the photoreceptor drum, but if the housing is attached or removed in a direction perpendicular to the axis of the photoreceptor drum Since the guide rail is inclined at a predetermined angle with respect to the attachment/detachment direction, the component of the force in the attachment/detachment direction is transmitted to the support means via the guide rail, and the support means is linked to the attachment/detachment operation of the housing. It slides inside the case of the corona discharge means in the direction in which the discharge wire is stretched.

Since the cleaning means supported by the support means is in contact with the surface of the discharge 9117 and/or the inner surface of the case, the cleaning means wipes off dust and dirt attached to the surface of the discharge wire and the inner surface of the case, and the corona discharge means is cleaned. be done.

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

FIG. 1 shows an embodiment of a copying machine to which an image forming apparatus according to the present invention is applied. Imaging lens, (
5) is the paper feed cassette, (6) is the paper feed roller, (force is the registration roller, (8) is the transfer charger, (9) is the fixing roller, (to) is the ejection roller, (1υ is the copy receiver, a
z is a housing, and in housing +121, 03) is a toner cartridge, (14) is a hopper, 05) is a supply roller, (5) is a stirring roller, surface is a developing roller, 08)
is a photosensitive drum, e is a cleaning unit, ■ is a snow removal lamp, and Ql) is a main charger. During maintenance or the like, the casing surface is pulled out in the direction of the arrow perpendicular to the axis of the photoreceptor drum (18).

In such a configuration, the photosensitive drum (2) cleaned by the cleaning unit is cleaned by the static elimination lamp (
b) When the static electricity is removed by
The surface is uniformly charged.

On the other hand, the original placed on the original placing table ('2J1.) is exposed to light by an exposure lamp (3), and the original image is formed on the photoreceptor drum (O) via the imaging lens (4). A latent image is formed. The toner image formed by the toner supplied to the latent image area from the developing roller is stored in the paper feed cassette (
5) to the paper feed roller (6) and registration roller (7)
A transfer charger (8) transfers the image onto a transfer paper supplied by a transfer charger (8). After that, transfer the transfer paper to the fixing roller (9)
It is fixed by the photoreceptor drum (18
), that is, from the main body (1) to the arrow (B
) is pulled out in the direction of

FIG. 2 is a perspective view showing details of a part of FIG. 1, and in FIG. A felt pad is in contact with the surface of the discharge wire (8a) and the inner surface of the case (8b) to constitute a cleaning means, and (c) is a support that supports the pad and is slidably attached to the case (8b). The body (support means) (23a) is a protruding piece provided within the support body. FIG. 2 is a perspective view seen from the bottom of the casing surface, in which a concave guide rail 34) is provided that engages with the protruding piece (23a) when the casing surface is attached to and removed from the main body (1).

FIG. 3 is an explanatory layout diagram showing the function of this embodiment, and when it is installed on the housing side, the protruding piece (23a) of the support (to)
is engaged with the end of the guide rail 24), and the casing surface is connected to the main body (
When it is pushed into the inside of 1) in the direction of arrow <A), the support body (c) is guided by the recess of the guide rail Q4) and moves, and when the 5A attachment of the housing a'2J is completed, the support body (c) is moved. 3
It reaches the position shown by the broken line in the figure. In this process, the pad (c) (FIG. 2 (a+)) acts on the surface of the discharge wire (8a) and the inner surface of the case (8b) to remove the attached dust.

Furthermore, when the casing surface is removed tIi, the protruding piece (23a) shown by the broken line in FIG. The support is guided by the guide rails () and reaches the position indicated by the solid line in FIG. 3 again. At this time, the surface of the discharge wire (8a) and the inner surface of the case (8b) are cleaned in the same manner as described above.

Fig. 4 is a perspective view showing the main parts of another embodiment in which the concave guide rail 34) shown in Fig. 4 (b) is replaced with a convex guide rail (24a) (Fig. 4 (b)). The case (8b) is provided with plate springs at both ends.The other configurations are the same as those of the previous embodiment.

FIG. 5 is an explanatory diagram showing the operation of this embodiment, and the housing (
When installing 121, attach the support (c) as shown in Figure 5 (J).
The end of the guide rail (24a) comes into contact with the protruding piece (23a), so when the housing (12) is pushed into the main body in the direction of arrow (A), the support (to) is guided accordingly. It moves guided by the rail (24a).
When the protruding piece (23a) reaches the end of the guide rail (24a) as shown by the solid line br, the leaf spring (c) biases the support in the direction of pulling it back as shown in Figure 6. , housing 0
When the installation of z is completed, the protruding piece (23a) is attached to the guide rail (2
4a) and is pulled back to the position shown by the broken line in FIG. 5+b>. During this period, pad
The factor (ω) is the surface of the discharge wire (8a) and the case (8
b) Remove the attached dust by layering the inner surface.

Furthermore, when the housing [F] is removed, the protruding piece (23a) is in the position shown by the solid line in FIG. (23
a) and when the housing [F] is pulled out of the main body [in the direction of arrow (B)], the support color is guided by the guide rail (24a) and moves accordingly.

Fig. 5 (As shown by the small broken line, when the end of the case (8b) is reached and the case a21 is completely pulled out, the leaf spring (c)
Due to the action of the protruding piece (23a), when attached to the housing surface -
It is pulled back to the position where it comes into contact with the guide rail (24a). Between this WI, the discharge wire (8a
) and the inner surface of the case (8b) are cleaned.

(g) Effects of the Invention According to this invention, the corona discharge means installed in the main body is automatically cleaned by 1 m in conjunction with the attachment/detachment operation when the casing equipped with the image forming means is attached/detached. To provide an image forming device that maintains images at all times and is easy to use.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a copying machine to which an image forming apparatus according to the present invention is applied, FIG. 2 (ω city) is a perspective view showing the main parts of an embodiment of the present invention, and FIG. FIG. 4 is an explanatory diagram showing the action of FIG. 4. (8)...Transfer charger, (8a)...
...discharge wire, (8b) ...case,
Surface: casing, pad,
(To)...Support, (23a...
...Protruding piece, V4) (24a) ...Guide rail. Figure 3 23a Figure 5 (a) Figure 5 (C) Figure 5 (b) Figure 5 (d)

Claims (1)

[Scope of Claims] 1. An image comprising a main body equipped with an image forming means including a corona discharge means and a casing equipped with an image forming means including a photoreceptor and detachable from the main body in a direction perpendicular to the axis of the photoreceptor. In the forming device, the cleaning means contacts the surface of the discharge wire and/or the inner surface of the case of the corona discharge means, and the support means is attached to the case of the corona discharge means to support the cleaning means and to be slidable in the direction in which the discharge wire is stretched. and a guide rail that is engageable with a part of the support means and is provided on the bottom surface of the casing at a predetermined inclination with respect to the mounting/detaching direction of the casing, and the guide rail is provided on the bottom surface of the casing. An image forming apparatus characterized in that a corona discharge means is disposed at the bottom of the housing so that the support means slides in conjunction with the attachment/detachment operation of a body.