JPS612173A - Toner storing device of electrostatic photographing device - Google Patents

Abstract

PURPOSE:To reduce the size of a toner storing device of an electrostatic photographing device by forming a toner storage on a photosensitive drum to supply toner to a developing roller and separating the recovered toner from unused toner to stay the recovered toner on the photosensitive drum. CONSTITUTION:A toner storing room 31 is formed on a fixed shaft 22 of the photosensitive drum 2 and toner is supplied to the developing roller through a toner carrier 42 provided with a toner discharging motor coil 43. On the other hand, the recovered toner obtained after development is similarly carried through a recovered toner carrier 46 and recovered in a recovered toner storage 30 on the drum so as to be separated from unused toner. Consequently, is unnecessary to form containers for storing the unused toner, recovered toner, etc., so that the toner storing device of the electrostatic photographing device can be reduced at its size.

Description

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

Technical background of the invention and its problems As shown in FIG.
In the process of rotating the JI-ram 2 in the 11 direction l\-, first, the outer periphery of the photosensitive tram 2 is charged by the charging charger 3, and this charged layer is irradiated with a light beam 4a from the light source 4 to generate an electrostatic latent. This electrostatic latent image is developed by a developing device 5 consisting of a toner container 6 and a developing roller 7. The paper 11 is then transferred by the transfer charge 12, fed by a controller 1:3, fixed by the fixing roller 1, and discharged to the left, and then transferred to the photosensitive drum 2 by the light of the lamp 15. There is a device in which the electrostatic latent image is erased and the residual toner adhering to the photosensitive ram 2 is removed by a cleaning device 16. The cleaning device 516 includes a wiping opening roller 17 for wiping residual toner from the outer periphery of the photosensitive drum 1.2, a magnet roller 18 for sucking residual toner from the wiping roller 17, and a blade 19 in contact with the magnetic roller 18. , and a collected toner receiver 20.

However, in the conventional developing device 5, the toner container 6 occupies a large space, and if the toner container 6 is made smaller, toner must be replenished frequently. In addition, unless the collected toner in the collected toner receiver 20 is transferred to another container, the collected toner receiver 20 will be full, so a space is required to install the collected toner container, resulting in an increase in the size of the device. .

OBJECTS OF THE INVENTION The present invention has been made based on the following points, and an object of the present invention is to provide a toner storage device for an electrostatic vacuum device that can be miniaturized.

SUMMARY OF THE INVENTION This invention stores toner in a photosensitive drum and supplies this toner to a developing device as needed, thereby downsizing the developing device and cleaning residual toner adhering to the photosensitive drum after printing. The collected toner is collected by a device, and the collected toner is stored in a photosensitive drum separately from unused toner, thereby eliminating the need for a dedicated container for the collected toner, and thus making the overall structure more compact. This is what I did.

Embodiment of the Invention An embodiment of the present invention will be described with reference to FIGS. 1 to 5. Components that are the same as those described in FIG. 1 are designated by the same reference numerals, and description thereof will be omitted. Both ends of a fixed shaft 22 are fixedly held on the pair of left and right side plates 21 by mounting fittings 23 and 24. The photosensitive drum 2 is rotatably held on this fixed shaft 22. That is, a bearing 26 fitted to the outer periphery of a flange 25 fitted to one end of the fixed shaft 22 is fixed to one end of the photosensitive drum 2, and a flange 28 having a gear 27 is fixed to the other end. A bearing 29 fitted to the fixed shaft 22 is fixed to the inner periphery of the shaft.

Thus, inside the photosensitive drum 2, a wide collected toner reservoir 30 is formed that surrounds the fixed shaft 22, and a toner storage section 31 is formed by a hole that is open at one end and is formed in the fixed shaft 22. has been done.

A slit 32 is formed in the second part of the l-ner storage portion 31, and a pipe-shaped guide upper cylinder 34 having a drop hole 3 is fitted into the slit 32, and a hole 35 is formed in the flange 25. is maintained. Furthermore, slit 3
2 and a slit 36 and a knob 37 that match the drop hole 33
A cylindrical cartridge 38 is provided.

Cartridge 1-ridge 38 contains unused toner inside;
Slit: After setting 36 to -H and fitting it into the guide tube 34, grip the knob 37 and turn it 180 degrees to open the slit 3.
6 coincides with the drop hole 33 and the slit 32, and the toner inside falls into the toner storage section 31. The outer periphery of the cartridge 38 has a locking portion 39 that resiliently engages with a portion (not shown) formed on the inner periphery of the guide cylinder 34, thereby positioning the cartridge 38 in the rotational direction. A toner conveying path 42 is formed by a gutter 40 whose lower surface is open toward the upper part of the developing roller rough and whose both ends are fixed to the side plate 21, and the vibrator 4 whose both ends are fitted into the toner storage section 31 and the gutter 40. One end of this 1-S-1 conveyance path 42 is connected to the toner storage section 3.
A flexible coil 43, which is a conveying member, is provided which extends deep into the container. A gear 44 driven by a motor is connected to the other end of this coil 43.

Next, one end of the collected toner receiver 20 held on the side plate 21 and a connecting hole 45 formed at the other end of the fixed shaft 22 so as to communicate with the collected toner reservoir 30 are connected to a collected toner conveying path 46 formed by a pipe. It is fitted. A coil 47 serving as a conveyance member is provided along the collected toner receiver 20, the toner conveyance path 46, and the connection hole 45. The end of the coil 47 is connected to a gear 48 driven by a motor.

In such a configuration, the coils 43 and 47 are also driven by the gear 44 or 48 while the photosensitive tram 2 is rotating.

rotated. Therefore, the toner in the toner storage section 31 is supplied to the upper part of the developing roller 7 along the toner conveying path 42 by the coil 43, and the electrostatic latent image on the photosensitive drum 2 is developed. Further, after printing, the collected toner collected from the outer periphery of the photosensitive drum 2 into the collected toner receiver 20 via the wiping roller 17, the magnet roller 16, and the blade 19 is transferred from the collected toner conveyance path 46 into the photosensitive drum 2 by a coil 47. The collected toner is collected in the collected toner storage section 30.

Therefore, there is no need to provide a l-toner container for storing unused toner or a container for collecting collected toner along the outer periphery of the photosensitive drum 2 (the overall structure can be downsized. The capacity of the photosensitive tram 2 is large, and the lifespan of the photosensitive tram 2 is said to be 40,000 to 60,000 sheets when printed on paper.
Since the recovery rate is as low as ~20%, the recovered toner can be stored until the photosensitive layer of the photosensitive tram 2 deteriorates and needs to be replaced, and it is also possible to omit the work of disposing of the recovered toner. Unused toner can be replenished by removing the cartridge 38, but in recent years there has been a demand for low-cost printers for personal computers.
Some models discard the photosensitive drum 1%2 after printing a sheet.

In such a case, there is no need to replenish toner. Of course, the fixed shaft 22 may be made thicker or the cartridge 38 may be made larger to increase the volume of the toner storage portion including the cartridge 38. Thereby, even when the photosensitive drum 2 with a long life is used, it is possible to omit toner replenishment work or to reduce the frequency of toner replenishment.

Effects of the Invention Since the present invention is configured as described above, toner can be supplied from inside the photosensitive drum to the developing roller, and toner collected from the photosensitive drum 1 after printing can be stored in the photosensitive drum 1. Therefore, it is possible to eliminate the need for a container for storing unused toner and collected toner, and therefore, the structure can be made smaller, and the work of disposing of the collected toner can be omitted. It has the following.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the present invention, with Figure 1 being a side view, Figure 2 being a horizontal sectional view, and Figure 3 being a...
Fig. 4 is an enlarged longitudinal cross-sectional view of the W section, taken from A- in Fig. 3.
FIG. 5 is an exploded perspective view, and FIG. 6 is a vertical side view showing the general overall structure. 2 ・Photosensitive drum j1.7...Developing roller, 16...ri1
J-ning device, 20 - collected toner receiver, 3 o - collected toner reservoir, 31 - toner storage part, 42 - toner conveyance path, 4: ... coil (conveyance member), 46 - collected toner conveyance path, 47 coil (Transportation components) Applicant: Tokyo Electric Co., Ltd. Agent: Akira Aiki)) Yaman□);・
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Claims (1)

[Claims] A toner storage section in which a developing roller of a developing device and a collected toner receiver of a cleaning device are arranged along a photosensitive drum on which an electrostatic latent image is formed on the outer periphery, and the toner before use is stored inside the photosensitive drum. A toner transport path is provided, one end of which is connected from the center of one end of the photosensitive drum to the toner storage unit and runs along the developing roller of the developing device, and the toner transport path is connected to the toner storage unit. a conveying member for discharging toner from the photosensitive drum; a recovered toner conveying path having one end connected from the center of the other end of the photosensitive drum to the recovered toner reservoir and the other end connected to the recovered toner receiver; A toner storage device for an electrostatic photographic apparatus, characterized in that a conveying member is provided for conveying collected toner from a receiver to the collected toner reservoir via the collected toner conveying path.