JPS6130275B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration device for a toner storage case in a copying machine.

An object of the present invention is to provide a toner storage case with periodic vibrations related to the rotation of the drum, so as to prevent residual toner removed by a blade from the photosensitive surface on the outer periphery of the drum from coagulating within the case. This is intended to prevent the toner from overflowing outside the case due to toner coagulation.

As a conventional method for removing residual toner from a photosensitive drum having a photosensitive plate attached to its outer peripheral surface, a method has been proposed in which a blade is constantly brought into contact with the surface of the photosensitive plate of the drum. In this method, the toner scraped off by a blade from the surface of the photosensitive plate on the outer periphery of the drum is stored in a toner storage case located close to a part of the outer periphery of the drum, and is used again. However, in the conventional method, residual toner is removed and stored in a stationary case, so the toner cross-links and solidifies near the case entrance, multiplies and causes the toner to be removed later to spill out of the case. However, they have the disadvantage of polluting the surrounding area and damaging equipment.

The present invention has been made in view of this, and includes a blade for removing toner remaining on the surface of the photosensitive plate by pressing against the surface of the photosensitive plate installed on the outer peripheral surface of the rotating drum. The present invention is characterized in that a toner storage case for storing the toner is provided close to a part of the outer circumferential surface of the drum, and a vibrating device is provided to the case to periodically apply vibrations due to the rotation of the drum.

The present invention will be explained below based on examples.

In the figure, reference numeral 1 denotes a drum rotatably provided within the main body of the copying machine, and a desired photosensitive plate is mounted along the surface of this drum. Further, although not shown in the drawings, a charging mechanism, an exposure charging mechanism, a developing mechanism, a transfer mechanism, and a cleaning device are sequentially provided surrounding the photosensitive drum in the outer circumferential direction of the photosensitive drum. Further, a cleaning device is provided to remove and clean the toner remaining on the photosensitive plate surface on the outer peripheral surface of the drum 1, and this cleaning device is installed parallel to the drum axis or diagonally over the entire length of the drum. It is either a cassette type to facilitate cleaning and maintenance or inspection, or it is a fixed type installed inside the main body of the copying machine. It is a formula. As shown in detail in FIG. 3, this cleaning device has a cleaning device case that spans the entire length of the photosensitive drum 1, that is, a toner storage case 3, which is installed parallel to and close to the drum 1. has a built-in spiral conveyor 4 for discharging residual toner on the surface of the photosensitive plate to the outside of the case, and also has a spiral conveyor 4 in pressure contact with the surface of the photosensitive plate on the outer periphery of the drum at a position facing the photosensitive plate surface on the outer periphery of the drum inside the case. ,
A blade 5 is provided to scrape off residual toner remaining on the surface of the photosensitive plate after transfer. The blade 5 is fixed to a blade mounting plate 6 provided inside the case, and the blade mounting plate is made swingable about a shaft S, and a lever 7 is fixed to one end of the shaft S. A roller 8 is rotatably provided at the tip of the lever 7, and the roller 8 is brought into pressure contact with the outer circumferential surface of a cam C provided on the outer surface of the drum. The blade, the blade mounting plate, the lever, and the roller are pressed against a predetermined portion of the photosensitive plate, such as an image forming area, by an elastic member, and are spaced apart from the surface of the photosensitive plate in other portions other than the predetermined portion. A spacing device is provided comprising: In addition, the toner scraped into the case adheres to the inner surface of the case due to the bridging phenomenon, etc., and when it multiplies and solidifies, it blocks the case entrance, and the toner scraped off later adheres to the inner surface of the case. This will prevent it from overflowing or falling onto the spiral conveyor. In order to prevent this, a vibration device 10 is provided which periodically vibrates the case. This vibrating device 10 has one end of a lever 12 pivotally attached to the main body of the copying machine via a shaft 11 so that it can be kicked once every rotation of the drum by a pin 13 provided on the side of the drum. A vibration lever 15 is pivotally attached to the other end of this lever 12 by a shaft 14, and furthermore, this lever 12
pin 16 always provided on the main body side with spring 9
It is designed to press against the side. A portion 12a of the lever is bent at the other end side of the lever 12 to become a contact portion with a pin 16, which will be described later, and also serves as a stopper so that the vibration lever swings in only one direction.

In the device configured as described above, the toner remaining on the photosensitive plate after transfer is scraped off into the case by a blade that is in pressure contact with the photosensitive plate by the rotation of the drum. be done. When the blade reaches the concave part of the drum when the drum rotates, the cam C swings the blade through the lever and blade mounting plate to keep it away from the photosensitive plate surface to prevent damage to the blade. When the lever 12 is kicked with the pin 13, the lever 12 and the vibrating lever 15 are swung against the spring 9, and when the lever is released from the pin, it is instantly restored by the restoring force of the spring. At this time lever 12
The bent part 12a collides with the pin 16 and stops, but the vibrating lever 15 pivotally attached to the lever 12 swings further, and the hammer 17 provided on the lever 15 hits the outer surface of the case. , which vibrates the case to ensure that the toner scraped off by the blade falls onto a spiral conveyor installed on the seat inside the case, and then the conveyor guides the toner into the desired storage tank T. It is.

The vibration lever having the hammer 17 that vibrates the case immediately returns to the position where it abuts the bent portion 12a, and the hammer 1
7 waits at a position away from the case.

According to the present invention, since the toner storage case is periodically vibrated every time the drum rotates, the scraped toner is reliably dropped to the bottom of the case without solidifying, and can be concentrated in one place on the conveyor. It has the advantage of not staining or damaging other parts.

[Brief explanation of the drawing]

FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a front view of the cleaning device. 1...Drum, 3...Toner storage case, 5...
...Blade, 10... Vibration device.

Claims (1)

[Claims] 1. A blade is provided that presses against the surface of a photosensitive plate installed on the outer peripheral surface of the rotating drum to remove toner remaining on the surface of the photosensitive plate, and a toner storage case containing toner removed by the blade is attached to the drum. A vibrating device for a toner storage case in a copying machine, characterized in that a vibrating device is provided close to a part of the outer circumferential surface of the case and periodically imparts vibration to the case by rotation of a drum.