JPS58107572A - Developer circulating device of electronic copying machine - Google Patents

Abstract

PURPOSE:To always secure the amount of developer at a certain level within each device and to delete satisfactorily the residual toner, by supplying previously and excessively the developer necessary to delete the residual toner as well as for development to each device and then circulating the excessive developer to each other. CONSTITUTION:The developer 3 is supplied to a developing device 4 and a cleaning device 5 by an amount more than a necessary level A and less than a limit level C respectively. Under such conditions, an electronic copying machine is started. Thus the conveying devices 8 and 13 in the devices 4 and 5 respectively are actuated at one time to circulate the excessive developer 3. As a result, the excessive developer circulates mutually between the devices 4 and 5. Thus the required developer of a certain amount is always secured for each device. In such a way, the residual toner can be deleted satisfactorily on the surface of a photosensitive layer.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention of Jin relates to a developer circulation device for electronic copying IaK.

Generally, an electronic copying machine uses a developer made of a mixture of carrier and toner, and includes a developing device that applies the toner to the surface of the photosensitive layer, and a cleaning device that removes residual toner from the surface of the photosensitive layer after transfer. and a KtIII feeding path between the developing device and the cleaner device,
It is known that the device is equipped with a developer circulation system that circulates the IK developer in each device through this conveyance path.

However, in the conventional developer circulation system fK, when the amount of developer in one of the devices increases, the developer is simply sent into the other device through the conveyance path. am and residual toner (
It is not possible to secure a certain amount of the developer necessary for removing the toner attached to the photosensitive layer after transfer in the above-mentioned device, and due to the problem, it is difficult to properly remove the toner from the surface of the photosensitive layer after transfer. There was a drawback that there were cases where it was impossible to interact with people.

This invention has been made in consideration of the above points, and its purpose is to pre-inject an e-developing agent into the developing device and cleaning device, which is necessary for developing and removing residual toner. (K11jjk), to ensure that the amount of developer in each device is always constant, and to maintain the *mt of the photosensitive layer.
The present invention provides an aS agent circulation device suitable for an electronic copying machine that can apply toner well and remove residual toner from the surface of one photosensitive layer.

An embodiment of the present invention will be explained below based on FIGS. 1 to 4. Ichinaka l/Ii electronic copy! A photosensitive drum equipped with IkK, KWA in the arrow X direction in FIG.
It is designed to rotate. A photosensitive layer 2 is provided on the surface of this photosensitive drum 1. 1II of this photosensitive layer 2
I! In the vicinity of i, /Ii, a developing device 4 which applies an 'iAgII agent 30) toner formed by mixing carrier and toner to the surface of the photosensitive layer 20, and a developing device 4 which applies the toner remaining after transfer to the photosensitive layer 2t) fR.
A removing device 17 for removing the photosensitive drum 1 from the surface is disposed opposite to the photosensitive drum 1.

The queen developing device 4 applies toner to the photosensitive layer 2 in the case body 6.
A magnetic pusher 7 for applying the developer 3 to the surface of the case body 6 and a conveyance device 8 for conveying the developer 3 inside the case body 6 are provided. The stones are set in a set configuration.

In addition, the upper P cleaning #f5 includes a brush 11, an agitation member 12 consisting of three plates for scraping off the toner deposited on the magnetic brush ll, and a case body 1.
This corresponds to the configuration in which a heavy conveyance device 13 for conveying the developer 3 in the container is disposed. In the case of H, the magnetic brush 11 is
A sleeve 11b made of a non-magnetic material is rotatably provided on the surface of the magnetic roll 11.

Further, each of the above-mentioned conveyance devices 8.13 is completely the same and is constructed as shown in Fig. 1fJa.

That is, each of the above-mentioned conveyance devices f8.13Fi, straight pipe 14
A shaft 18 is rotatably inserted therein, spiral fins 16, 16 are provided on the same surface except for the middle part of the shaft ISO, and a partition plate 17 is provided in the middle part of the pipe 14. Therefore, in FIG. 3, the carry-in section is configured on the left side, and the carry-out section is configured on the right side. Jin's delivery 11A@Nofia"14
An injection port 18 for injecting the developer 3 into the case 14 is formed at the upper left side of the case 14.
At the bottom of the partition plate 17, there is developer 3 in /4 ear'14.
An inlet 19 is formed through which the material is fed into each device 4.5. In addition, an outlet 20 for discharging the developer 3 in each device 4 and s is formed at the lower part of the partition plate 17 of the motherboard 14 on the discharging section side. / Sending port 2 that sends out the developer 3 in the dive 14
1 is formed. Furthermore, each of the conveying devices 8.13 is tilted so that the pipe 14 on the loading section side is high and the armpit 14 on the unloading section is low, as shown in Figure S'. 5, respectively. In this case, the lower 1s of each conveyor 1111KNeSt and large conveyor 0200jl of each conveyance device 8.13 is the developer 3 in each device 4.5.
It is set in the location corresponding to the required level. Note that both ends of the shaft 16 in the no-ignition 14 are rotatably supported by bearings 22, 22.

Furthermore, the above-mentioned transport devices s and 13 are interconnected via transport paths 23 and 24, as shown in Figure 4. That is, one end of the conveyance path 23 is connected to the outlet 21 provided on the carry-out section side of the conveyance device 8, and the other end is connected to the inlet 1 provided on the carry-in section 1111 of the conveyance device 13.
It continues on to 8.

The conveyance path 24 has one end connected to the outlet 21 Kll of the conveyance device 13 and an inlet 18 provided at the input side of the conveyance device 8 at the other end.
It is connected to the.

Next, the action of the IA imager circulation system which can be achieved as shown in #1 above will be explained. In advance, the developer 3 must be supplied into the developing device 4 and the cleaning device at a level above Perm and below the limit level C, respectively.

When the electronic copying machine is started in this state, the developing device 4 and each conveying device 8.13 in the cleaner device ks operate simultaneously, and the excess developer 3 in each device 4.5 is transferred to the next one. It cycles like this. That is, when the conveying device 18 operates and the fins 16.16 rotate with the rotation of the shaft S,
With this rotation, the excess developer 3 of the required level 5 or higher in the developing device f4 passes through the outlet 20 and is fed into the die f14. This sent fjIgI agent 3ti,
The fins 16 on the discharge section side pass through the pipe 14 and the outlet 21 is also fed into the conveyance path 23.
Conveyance device 1 equipped with a cleaning device and a cleaning device
3 into the pipe 14 on the loading section side. In this way, the transport equipment [1! The JK conveyed developer 3 is carried in because the fins 16 and 16 also rotate as the shaft 15 of the conveying device 13 rotates at the same time as the conveying device 8! !
It passes through the inside of the negative (negative) arm f14 and is supplied into the cleaning device 5 from the waste inlet 19.

Additionally, a transport device 13 disposed within the cleaning device 5
tf, with the rotation of each shaft 15 and fin 16.16 inside thereof, the excess developer 3 of the required level 5 or higher in the cleaning device 5 is sent from the carrying out port 20/into the carrying out part f14. It is fed into the conveyance path 24 from the outlet 21 by the side fins 16 .

In this way, when the developer 3 is sent into the conveyance path 24,
It passes through the transport path 24 and is sent into the p4 ear' 14 from the injection port 18 of the transport device s disposed in the developing device 4,
This fed developer 3 is supplied into the current dispensing device 4 .

In this way, in the above-mentioned developer circulation device, the current dispensing device 4
The excess developer 3 supplied into the cleaning device 5 in excess of the required level is mutually circulated between the current dispensing device 4 and the cleaning device 5 by each conveyance device fjt8.13 and each conveyance path 23.24. Therefore, the amount of developer 3 in each device 4, b can be maintained at a constant constant level, and therefore, toner can be well applied to the surface of the photosensitive layer 20, and after transfer, the developer 3 can be kept at a constant level. Toner remaining on the surface of layer 2 can be removed satisfactorily.

In addition, when each developer 3 in the development device 4 and IJ-ning device [5] reaches the required level, the developer supply device 9 disposed in the upper trap of the KFi, IJi Soso f4 is supplied to the current supply device. Supplied within 4 days.

Further, the present invention is not limited to the above-described embodiments, and may be such that the conveying device is modified as shown in Figures 5 and 6. That is, the conveyance device f3 shown in FIG.
(1. A pipe 31 is disposed horizontally in the developing device [4 and the cleaning device 5, and a shaft 33 having spiral fins 32 and 32 is rotatably distributed within this/example f31. A partition plate 34 is provided in the middle of the above-mentioned pipe 31, and a carry-in section is formed on the left side of the pipe 31, and a carry-out section is formed on the right side 111. In addition to forming an inlet 35 for injecting the image agent, an inlet 36 for feeding the upper Kvl image agent of the pipe 31 on the partition plate 34 side into each device 4.5 is formed. A discharge port 37 for discharging the developer in each device 4.5 is formed in the lower part 111 of the partition plate 34 at f31, and a discharge port 38 for discharging the developer is formed at the right end of the dive 31. It has become a trap with nine configurations.

In the conveying device 30 configured in this way, although the armpit 31 is arranged horizontally, the loading opening 36 is formed at a higher level 111 than the loading opening 37. , has exactly the same effect as the above-mentioned embodiment.

In addition, the 4 eaves 41 and 42 of the conveying equipment shown in Figure 6 (40 is two) are butted against each other at different levels, and each of the 9 eaves is stiffened.
Each shaft 45.46 having spiral fins 43.44 in 41, 42 is rotatable Kik',f, and each of these shafts 45.46 has gears 47% meshing with each other at the ends approaching each other I/C. 48, and each dive 41.4 that was matched at different levels! An inlet 49 for injecting the developer is formed at the upper left side of the ignition 41 located at a high place, and 1 g of developer is injected into each device 4.5 at the bottom of the dive 41 at the 1st gear 47@. At the lower part of the gear 48@ of the pipe 42 located at a low place, an outlet 51 for carrying out the developer in each device 4.5 is formed. The configuration is such that a delivery port 52 for delivering the developer is formed at the right end of the f42.

Even in the conveyance device 40 configured in this way, the outlet 5
Since the loading port 50 is formed at a higher position than #1,
This embodiment has the same effects as those of the embodiment described above.

In addition, in each of the above-mentioned embodiments, the case where the carrier is made of a magnetic material is used as the developer.
This invention can be applied to 3J agents using carriers made of other materials without being limited to this.

As explained above, 1. According to the developer circulation device according to the present invention, the developing device mixes carrier and toner and uses a developer to apply the toner to the photoreceptor, and the developer collects the soda from the photoreceptor. These 31
In a developer circulation system in an electronic copying machine, which is installed at the interface between the 11M station and the cleaning device and supplies the developer to each device through a good book feed path, there is an inlet for feeding the developer, and an inlet for this inlet. A conveying means provided with a discharge port provided at a lower position for conveying the developer is disposed in each of the developing device and the cleaning device, and among these devices,
The developer carried out from the outlet of the conveying means disposed in one of the apparatuses is guided through the conveyance path to the inlet of the conveying means disposed in the other apparatus, and Add a certain amount of developer [411! Because of this structure, excess developer is circulated between the developer, imaging device, and cleaning device via the conveyance device and the conveyance path, ensuring that a constant amount of the necessary developer is always kept in each device. As a result, toner can be applied well to the surface of the photosensitive layer, and remaining toner can be removed from the surface of the photosensitive layer after transfer, resulting in good copying. There are advantages.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of the developer @1rli loading according to the present invention, Fig. 2 is a cutaway perspective view of main parts of the cleaning device, Fig. 3 is a sectional view of the conveying device, and jlB4- is a schematic diagram of the iris f diagram. [Child ii] Figure, Figure 5 Hiro et al.'s transportation device's Kabe part fracture correct 1liI
FIG. 6 shows the disconnection and melting of yet another conveying device. l...Photosensitive drum, 2...Photosensitive layer, 3
...Developer, 4...Development device, 5...
...Cleaning device, 8.13.30%40...
...Conveyance device, 19.36.50...Carry-in entrance, 20, B7.51...Carry-out exit, 23.24
−・・・Conveyance path. Figure 1 10 Figure 3 Figure 5

Claims (1)

[Claims] Using a developer containing a mixture of carrier and toner, the aeiI&l! In an electronic copying machine, an inlet for feeding developer into an electronic copying machine, which is provided between a developer and a cleaning device, and supplies 11 ml of developer to each scissor through a conveyance path; 4) A large conveying means is provided in the above-mentioned cooling device and the cleaning device, and has a carrying-out port provided below the carrying-in port for carrying out the copper agent and carrying out the copper agent. The lI image agent discharged from the outlet of the #I conveying means disposed in one of the apparatuses is guided to the conveying means O inlet disposed in the other apparatus through the jIP conveying path, and A circulation device for an agent used in an electronic copying machine, which is characterized in that the amount of developing steel in each device is maintained at a constant level.