JPS60125867A - Toner supplementing device of electronic copying machine - Google Patents

Abstract

PURPOSE:To supplement a sufficient amount of toner for copying speedily without lumping by providing a toner carrier belt which is driven in the breadthwise direction of a copy and distributing the toner uniformly to a developing device. CONSTITUTION:The belt 5 which supplies toner onto a dispenser roller from the supply port at the lower part of a toner cartridge 1 is long enough to cover the oeverall length of the dispenser roller, and a dispenser stay 6 is provided in contact with the belt 5 at a specific interval. When the belt 5 runs are shown by an arrow A, toner falls on the dispenser roller by the width corresponding to the length of the stay 6. Thus, the toner carrier belt 5 which is driven in the breadthwise direction of a copy is provided to supply toner which is much enough for copying speedily without lumping.

Description

Detailed Description of the Invention [Field of Industrial Application] This invention relates to a toner replenishing device for an electronic copying machine, and particularly to a copying machine in which a toner cartridge is disposed at the end of a toner conveying device. The present invention relates to a toner replenishing device with excellent response speed that can supply toner to a developing machine.

[Prior art]

Generally, in a small copying machine, toner cartridges having the same length in the copy width direction are placed on a dispense roller having the same length, and this is installed above the developing machine to distribute the toner uniformly. It is dispersed in the developing machine. According to this method, toner can be quickly and uniformly supplied to the developing machine, but the upper space of the developing machine is
The space will be occupied by the ridges and the space will be inefficiently used.

The larger the machine that can copy a large area, the greater this disadvantage becomes.

For this reason, in large-sized copying machines, a mechanism is used in which an L-ner cartridge cartridge is disposed outside the copying mechanism, and the toner is transported to a dispense roller by a transport device such as a screw.

FIG. 1 is a diagram showing such a conventional toner replenishing device, and FIG. 2 is a diagram schematically showing the arrangement relationship between this toner replenishing device, a photosensitive drum, and a developing device. In the figure, 1 is a tree cartridge placed outside the copying mechanism, and 2 is a tree cartridge placed outside the copying mechanism. This is a screw for transporting 1 to 1 toner which rotates around l11/I, and holes or grooves are provided at predetermined intervals at the lower end of a container that accommodates the screw. Also 3
is a dispense roller that spreads toner onto the developing device 10.

The developing machine 10 includes a developer 11 that mixes toner and developer and charges them by friction, a paddle wheel 12 that supplies the charged and mixed toner and developer onto a magnet roll 13, and a paddle wheel 12 that applies the toner and developer to the surface of the photosensitive drum. It consists of a magnet roll 13 etc. that conveys the .

In such an apparatus, the toner contained in the toner cartridge is conveyed by the rotation of the conveyance screw 2, and is delivered to the dispense roller 3 through holes provided at predetermined intervals.
supplied to The dispensing roller 3 rotates around an axis 8 and moves this 1-ner to the current rI1. The mixture is evenly distributed and dropped into the blender 11 of the machine 10.

When copying, it is necessary to supply a sufficient amount of toner to the entire length of the dispense roller, which has approximately the same dimensions as the width of the copy, but in the case of large area copying, the length of the dispense roller must also be However, there are various difficulties in supplying 1-ner in a short period of time. For example, when the amount of toner decreases or the copy becomes thinner, a command is issued to send more toner, but when the rotation of the toner transport screw is increased in response, the toner is heated due to friction. . Since 1-ner is fixed on paper etc. by heating, it originally has the property of melting and solidifying when heated. Therefore, if the screw is rotated at high speed to increase friction, it will be heated strongly and solidify, and 1-ner will be fixed on paper etc. This method has the disadvantage that the response speed to supply commands cannot be increased. On the other hand, if the toner is fed at a speed at which the toner does not solidify, the feeding speed cannot be reduced, resulting in the disadvantage that the copying speed is ultimately limited by the toner feeding speed.

[Purpose of the invention]

The present invention has been made to improve the above-mentioned drawbacks, and in a copying machine in which the toner cartridge 1 to the cartridge are arranged at the end of the toner conveying device, a sufficient amount of 1 for copying can be obtained.
- It is an object of the present invention to provide a toner replenishing device that can quickly replenish toner to a developing machine without solidifying it.

[Structure of the invention]

In order to achieve this object, the present invention provides a toner conveying heald that is driven in the width direction of the copy in a copying machine in which the toner cartridge is disposed at the end of the toner conveying device, and the toner is evenly distributed to the developing machine. It is characterized by being made possible.

As a result, a sufficient amount of toner corresponding to the copying speed can be quickly supplied to the current machine without solidification.

〔Example〕

An embodiment of this invention will be described using FIG. 3.

In the figures, the same members as in FIGS. 1 and 2 are given the same numbers. In this invention, a wide toner conveying belt 5 is provided in place of the conventional one-chie conveying screw shown in FIGS. 1 and 2. 1 to the toner conveying belt 5 is supported by a belt wheel 7.7' and driven in the direction indicated by the arrow, which is the width direction of the copy, and the toner conveying belt 5 is driven in the direction indicated by the arrow, which is the width direction of the copy. is conveyed onto a dispensing roller (similar to that in FIG. 1, although omitted in FIG. 3), so the length is sufficient to cover approximately the entire length of this dispensing roller.

At a portion of the conveying heald 5 corresponding to the dispensing roller, a dispensing stay 6 for distributing the 1-toner to the dispensing roller at predetermined intervals is provided in close contact with the heald 5. As shown in the figure, the stay 6 is arranged to be inclined with respect to the traveling direction A of the belt so that the toner on the heald 5 can be scraped off by a predetermined amount, and the stay 6 is arranged along the traveling direction A. -+, 6-
The length is gradually increased as 2-=-.

When the toner cartridge 1 is rotated and the toner 111i conveying belt 5 is driven, l.toner is continuously supplied onto the toner conveying belt 5. When the toner reaches the dispense stay 6-1 provided on the toner conveying bell l-5, the toner is dropped onto the dispense roller by a width corresponding to the length of the stay 6-1. Similarly, toner is sequentially dropped onto the dispense roller at each tray 6-2, 6-3-.

In order to increase the amount of toner conveyed, it is sufficient to increase the width of the toner conveying heald 5 or to increase the moving speed of the toner conveying heald 1-5, and either of these can cause frictional heating of the toner. There isn't.

〔Effect of the invention〕

As described above, according to the present invention, a toner conveying belt driven in the width direction of the copy is provided in place of the conventional toner conveying screw, so that a sufficient amount of toner for copying can be quickly delivered. Moreover, it can be replenished without solidifying.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing a conventional toner supply device, and Figure 3 is a diagram showing a conventional toner replenishing device.
The figure shows an embodiment of a toner replenishing device according to the present invention. ■-Toner cartridge, 2-Toner conveyance screw, 3-Dispense roller, 5-1-Chi 11i1 feeding heald, 6-Zoisbens stay, 10-1 image machine, 2
〇-Photosensitive drum surface. Patent applicant Fuji Xerox Co., Ltd. Representative Patent Attorney Akira Yamatani 2nd session

Claims (1)

[Claims] An electronic copying machine in which a toner cartridge is disposed at the end of a toner conveying device, characterized in that a toner conveying heald is provided that is driven in the width direction of the copy, so that toner can be evenly distributed to a developing device. Machine toner replenishment device.