JPS612180A - Toner recovering device of electrostatic photographing device - Google Patents

Abstract

PURPOSE:To reduce the dumping frequency of residual toner and to reduce the constitution of a toner recovering device by recovering the residual toner temporally stored in a toner receiving member of a cleaning device into a photosensitive drum. CONSTITUTION:The residual toner temporally stored in the toner receiving member of the cleaning device is recovered into a rotary room 23 having a large capacity which is formed by the photosensitive drum 2 through a carrier 29 or the like by a coil 30 which is a carrying member rotating by interlocking with the rotation of the drum 2. Consequently, the dumping frequency of the residual toner can be reduced, the formation of a toner recovering cotainer can be omitted and the constitution of the toner recovering device can be reduced.

Description

[Detailed description of the invention] Technical field of invention The present invention relates to a toner recovery device for an electrostatographic apparatus.

Technical background of the invention and its problems As shown in FIG. 3, conventionally, in the process of rotating a photosensitive drum (2) attached to a frame (1) once in a clockwise direction, the photosensitive drum (2) is first charged by an electrostatic charger (3). The outer periphery of (2) is charged, and a light beam (4a) from the light source part (4) is applied to this charged layer.
is irradiated to form an electrostatic latent image, this electrostatic latent image is developed by a developing device (5), and the developed toner image is drawn out from a cassette case (6) by rollers (7) and (8) onto a sheet of paper ( 9) by the transfer charge, and then the paper (9) is sent by the conveyor α, and the fixing roller 0 is transferred.
2, the lamp is fixed and ejected to the left, and on the other hand, the lamp u3
There is a device in which the electrostatic latent image on the photosensitive drum (2) is erased by light, and the remaining toner adhering to the photosensitive drum (2) is removed by a cleaning device (b).

The cleaning device α4 wipes the remaining toner on the photosensitive drum (2) with a clockwise rotating sponge or the like, wipes it with a 90-ra09, and removes the residual toner sucked from the wiping roller αQ to the magnet roller α0 with a blade ( 12, the toner is scraped off and collected in a toner receiver α ladle.It has been considered that the collected toner can be reused for development, and it has been put into practical use to some extent, but in reality paper dust etc. are mixed in. As a result, print quality deteriorates.

For this reason, there is a conventional example in which a container is provided to collect the toner from the toner receptacle 0→ and the toner inside the container is periodically discarded, but this requires space to install the container, which increases the size of the device. Additionally, there is a problem in that it is difficult to attach and detach the container, resulting in spillage of toner.

Purpose of the Invention The present invention has been made in view of the above points, and provides an electrostatic photographic apparatus which can be miniaturized by significantly reducing the frequency of disposing of residual toner and by omitting a container for collecting residual toner. Use the toner collection device as a scale for all purposes.

SUMMARY OF THE INVENTION The present invention utilizes a large put space in a photosensitive drum to collect residual toner temporarily accumulated in a toner receptacle of a cleaning device, thereby significantly reducing or eliminating the work required to dispose of residual toner. Furthermore, the apparatus is constructed so that a container for collecting residual toner is not required, and therefore the apparatus can be miniaturized.

Embodiment of the Invention An embodiment of the invention will be described with reference to FIGS. 1 and 2. Components that are the same as those described in FIG. 3 are designated by the same reference numerals, and description thereof will be omitted. α-ring is a pair of left and right frame members. These frame members α are held in the frame (1) shown in FIG. A sensitive drum (2) is rotatably attached to these frame members α, and a charging charge (3), a developing device, a lamp Oj, and a cleaning device α4 are also attached. The developing device (1) consists of a toner box Q) with an opening at the bottom that stores toner and a magnet roller (c) connected to a motor.

The cleaning device a< has the same configuration as shown in FIG.
The shape of the toner receiver (181) is determined to have a semicircular cross section.

The photosensitive drum (2) is hollow and has a large toner collection chamber (
C) is formed. Frame member α9 has a fixed shaft (
Both ends of c) are fixed with fixing fittings (c).

This fixed shaft (c) passes through the center of the photosensitive drum (2) and rotatably holds the end plate (c) of the photosensitive drum (2) by means of a bearing (a). Further, a passage (c) communicating with the inside of the photosensitive drum (2) is formed at one end of the fixed shaft (c).

This passage (c) and one end of the toner receiver Q scoop are connected by a conveyance path (c) by a vibrator.

A flexible coil forming a conveyance member is provided along the toner receiver α scoop and the conveyance path (c).

One end of the coil (G) is rotatably loosely fitted into the passage (C), and the other end is fixed to a gear 0] which is a rotational drive unit supported by a frame member α. This gear G center, the gear 02 connected to the magnet roller αQ of the cleaning device a<, and the gear 0 fixed to the end of the photosensitive drum (2)
3 and 3 are respectively connected to a motor via a transmission gear (not shown).

In such a configuration, while the photosensitive drum (2) is rotating, the coil (G) is also rotated by being driven by the gear 0]).
The remaining toner that has fallen into the toner receiver (1) is transferred to the photosensitive drum (2) via the conveyance path (2) and the passage (3) by the coil (3).
) is transported to the toner collection chamber (2) from the center of the end. The photosensitive drum (2) is charged in one rotation, irradiated with light beam (4a),
Since development, transfer, irradiation with light from the lamp α1, cleaning, etc. are carried out, the outer diameter is large, and therefore the inside is also large. Since unnecessary toner is collected in this wide dead space, toner disposal work can be significantly reduced.
When the interior is filled with toner, the photosensitive layer of the photosensitive drum (2) may also deteriorate, and there may be no need to take out and dispose of the toner inside the photosensitive drum (2). Also,
Since there is no need to separately collect the remaining toner in a separate container, the apparatus can be made smaller.

Effects of the Invention Since the present invention is configured as described above, the remaining toner can be collected by using a large dead space within the photosensitive drum, and as a result, at least the task of disposing of the remaining toner can be significantly reduced. ``Furthermore, it is possible to eliminate the need for a container for collecting residual toner, which has the effect of making it possible to downsize the apparatus.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 show an embodiment of this invention.
FIG. 1 is a 11111 side view of the main part, FIG. 2 is a horizontal sectional view thereof, and FIG. 3 is a reduced vertical sectional side view showing the overall conventional structure. 2... Photosensitive drum, 14... Cleaning device, 1
8... Toner receiver, 19... Frame member, 20...
...Development device, 29...Transportation path, 30...Coil (
Transfer member), 31...Gear (rotary drive unit) Applicant: Tokyo Electric Co., Ltd. l J Figure 4, y37

Claims (1)

[Scope of Claims] 1. A hollow photosensitive drum on which an electrostatic latent image formed on the outer periphery is developed by a developing device is rotatably provided, and a toner receiver along the photosensitive drum is provided to remove residual toner on the photosensitive drum. A cleaning device is provided to remove the remaining toner in the toner receiver, and a conveyance path is provided that connects the end of the toner receiver and the center of the end of the photosensitive drum, and at least a portion of the toner receiver is disposed along the conveyance path to remove residual toner in the toner receiver. 1. A toner recovery device for an electrostatographic apparatus, comprising: a conveying member for conveying toner to the inside of the photosensitive drum. 2. The toner recovery device for an electrostatic photographic apparatus according to claim 1, wherein at least the photosensitive drum and the cleaning device are attached to the same frame member to form a unit. 3. The electrostatic device according to claim 1 or 2, characterized in that the conveying member is formed by a flexible coil whose one end is connected to a rotational drive unit and which is disposed along the toner receiving and conveying path. Toner collection device for photographic equipment.