JPS6045433B2 - Charger cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device for a corotron wire or charger.

The reason why the corotron wire gets dirty is that the atmosphere inside the copying machine contains toner and paper dust, the corotron faces a photosensitive surface close to where toner particles remain, and the wire itself has the same function as an electric collector. This includes having the following:

When dirt adheres to the corotron wire, uniform discharge becomes impossible, resulting in poor copy image quality, transfer performance, transfer paper peelability, cleaning performance, etc.

,, L, ゛ゝRe-Juku, When pulling out the Corotron Shield method, a cleaner pad fixed inside the machine rubs the wire.

Recently, there is also a type in which a cleaner pad moves on a corotron wire at the same time as the paper tray is pulled out. All of these have advantages and disadvantages. That is, although the former method is simple, it is time-consuming in a copying machine having a large number of corotrons. In the latter case, the link mechanism becomes complicated. The present invention has been made in view of the above circumstances, and its purpose is to be able to automatically clean the corotron wire reliably, efficiently, and easily and inexpensively. It is an object of the present invention to provide a charger cleaning device which enables cleaning of all corotrons at regular intervals, eliminates mutual variation in discharge on a drum, and keeps process parameters constant.

Hereinafter, the present invention will be explained with reference to the drawings.

In the drawing, 1 is a shield, and wire fixing plates 2, 2' are provided on both ends of the shield 1.
A corotron wire 3 is stretched between them. Further, the corotron wire 3 is located in a tension spring 4 and is given tension. A long guide hole 5 is formed in the outer surface of the shield 1 in parallel with the corotron wire 3.

In the drawing, 6 is a cleaner pad, and the cleaner pad 6 is in sliding contact with the corotron wire 3. cleaner bud 6
An engaging portion 7 is formed in the shield 1, and the engaging portion 7 slidably passes through the guide hole 5, and a hook portion 7a of the engaging portion 7 is in sliding contact with the outer surface of the shield 1. A in the drawing is a cleaner pad reciprocating means, and this reciprocating means A is equipped with pulleys 10 and 11 that are pivotally supported on the shield 1 via brackets 8 and 9, and a cleaner drive wire 12 is connected between the pulleys 10 and 11. The cleaner drive wire 12 is attached to the engaging portion 7 of the cleaner pad 6.

A friction roller 13 is attached to the Pooh 1 river 0. B in the figure is a driving force transmission mechanism.

This driving force transmission mechanism B includes a driving plate 23 that is rotatably provided concentrically with the drum shaft 22, and a friction roller 2 at the shaft end of a motor 24 is attached to the outer peripheral edge of the driving plate 23.
5 are in contact. Further, the drive plate 23 has an annular friction surface 2.
6 is formed, and the friction roller 13 of the cleaner pad reciprocating means A is in contact with the friction surface 26. Therefore, by driving the motor 24, the drive plate 23 is rotated, the friction roller 13 is rotated, the cleaner bud 6 is reciprocated, and the corotron wire 3 is cleaned.

Also, as shown in FIG. 7, the cleaner bud 6 is biased to one corner by a spring 27, and pooh! When the cleaner bud 6 reaches the end of the cleaning area against the spring 27 due to the entanglement of the river 0, the power to the motor 16 is cut off and the cleaner bud 6 returns using the spring force of the spring 27. good.

In addition, a circuit (not shown) allows a certain period of time (the time required for the cleaner to make one round trip) when the main switch of the machine is turned on in the morning.
It is convenient to automatically move and drive the corotron cleaning motor, and if cleaning is required at other times, a switch is provided on the machine control panel and the switch can be pressed to perform the cleaning as appropriate. The present invention has been described in detail above, and includes a cleaner pad 6 that is reciprocatably provided on the shield 1 and that comes into sliding contact with the corotron wire 3 stretched within the shield 1 to clean the corotron wire 3; A cleaner pad reciprocating means A is provided on the drum shaft 22 to convert the rotation of the friction roller 13 into movement of the cleaner pad 6; An annular friction surface 26 is provided on the drive plate 23 in contact with the friction roller 25 at the end of the shaft of the cleaner pad 24, and a driving force transmission mechanism B in contact with the friction roller 13 of the cleaner pad reciprocating means A (7) is provided on this friction surface 26. There is a cleaning device for a charger which is characterized by:

Therefore, all the corotrons, for example, the static eliminating corotrons and the charging corotrons, are each equipped with a cleaning device, and in each cleaning device, the friction roller 13 of the cleaner pad reciprocating means A is brought into contact with the friction surface 26 of the drive plate 23. This makes it possible to clean the drum at regular intervals, eliminates variations in discharge on the drum, and keeps process parameters constant.

For example, if only the charged corotron wire is cleaned while the static neutralizing corotron remains dirty, the static neutralizing effect will be relatively poor, which may result in afterimages, background stains, etc. However, with the device of the present invention, such problems are eliminated. Furthermore, the corotron wire can be automatically cleaned reliably and efficiently, and the apparatus can be made simple and inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted perspective view of an embodiment of the present invention, Fig. 2 is a partially cutaway plan view, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, and Fig. 4 is a partially omitted perspective view of an embodiment of the present invention. FIG. 5 is a perspective view of one embodiment, FIG. 5 is a sectional view of the same, FIG. 6 is a view taken from the direction of FIG. It is. 1 is a shield, 3 is a corotron wire, 6 is a cleaner bud, A is a cleaner bud reciprocating means, and B is a driving force transmission mechanism.

Claims (1)

[Claims] 1. A cleaner pad 6 that is provided on the shield 1 in a reciprocating manner and that cleans the corotron wire 3 by slidingly contacting the corotron wire 3 stretched within the shield 1; and a cleaning pad 6 that is provided on the shield 1 and that rotates the friction roller 13. a cleaner pad reciprocating means A that converts the movement of the cleaner pad 6 into movement of the cleaner pad 6; a drive plate 23 is provided concentrically and rotatably on the drum shaft 22;
5 and a driving plate 23 is provided with an annular friction surface 26, and a driving force transmission mechanism B is provided in which the friction roller 13 of the cleaner pad reciprocating means A is in contact with the friction surface 26. Cleaning equipment.