JPS6170568A - Toner supply device - Google Patents

Abstract

PURPOSE:To improve the quality of printing by providing a stopper which not only stops the rotation of a rotating arm but also scatters a toner held on the arm from above a developer accumulating part. CONSTITUTION:When a rotating arm 22 is turned around a shaft 24, a toner 16 in a toner accumulating part 21 is scooped by a watershoot-shaped member A and is lifted, and the toner 16 held on the watershoot-shaped member A is scattered onto a developer accumulating pat 18 by collision between the rotating arm 22 and a stopper 26. A developer 18 in which the toner is dispersed is agitated and carried by an agitating roll 9 to develop an image on a latent image forming body by a magnetic roll 10. Since the toner 16 is dispersed onto the developer 8 and is supplied in this manner, the toner 16 is dispersed quickly into the developer 8, and it is easy to keep the concentration of the toner 16 in the developer 8, and the quality of printing is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for supplying toner by dispersing it in a developer in a developing device in a copying machine or a printing device using an electrophotographic recording method or an electrostatic recording method. The present invention relates to a toner supply device.

For example, as a printing device using an electrophotographic recording method,
There is a printer shown in the figure. In the figure, after the surface of a latent image forming body 1 is charged by a charger 2, an electrostatic latent image is formed on the latent image forming body 1 by irradiating and exposing it to light P. is visualized using toner in the developing device 3. After the toner image is transferred onto the recording paper 4 by the transfer device 5, the toner image on the recording paper 4 is fixed by the fixing device 7.

As shown in FIG. 5, a two-component developer 8 consisting of toner and carrier is stirred in the developing device 3 by a plurality of stirring rollers 9 (one in the figure) to charge the toner. ,
The developer 8 is conveyed in a spiked manner using Magnetic Rho No. 910,
On the other hand, the latent image formed on the latent image forming body 1 is developed with toner in the developing device 3.

The toner supplying device 11 is configured to automatically supply toner into the developer 8 in the developing device 3 by the amount of toner consumed by the above-mentioned developing action.

The toner replenished into the developer 8 needs to be uniformly and quickly diffused into the developer 8 to keep the toner concentration in the developer constant and maintain printing quality.

[Conventional technology]

Conventionally, a developer 8 of a developing device 3 as shown in FIG.

A toner supply device 11 for supplying toner includes a supply roller 13 having a groove 12 at its lower part, and a temporary spring 14 for scraping out the toner in the groove 12. Note that 15 is a temporary ear cutter to make the height of the ears the same.

Once the toner supply device 11 supplies toner, it develops the toner by the number of times set in a counter circuit (not shown) and then supplies it by rotating the supply roller 13, or by marking the recording paper 4 and checking its density. Toner supply control is performed by detecting the toner and rotating the supply roller 13 to supply the toner. The amount of toner released by the supply roller 13 is determined by the groove 12.
The rotation of the supply roller 13 supplies the toner in the groove 12 to the developing device 3 .

[Problem that the invention seeks to solve]

When supplying the toner 16 in the toner supply device ll to the developer 8 in the developing device 3, the supply roller 13 i
When the toner 15 in the toner 1112 is scraped out by the spring 14 and falls on the developer 8, it is necessary to immediately and uniformly diffuse the toner 15 so that the developer 8 recovers a predetermined density.

However, when the toner 15 in the groove 12 of the supply roller 13 is scattered by the splashes 14 and falls on the developer 8, it is often supplied as a lump, and although it is stirred by the stirring roller 9, it is not uniformly dispersed. However, there was a problem in that printing was uneven.

[Failure to solve the problem]

The above problem is solved by a rotary arm having a means for collecting toner from a toner reservoir of a toner supply device and supplying the toner to a developer reservoir of the developing device; This is achieved by the toner supply device of the present invention, which is characterized in that it is provided with a stopper for scattering the developer from the upper part of the developer reservoir.

[Effect]

A rotary arm that holds a rain gutter-like member installed in the toner supply device is rotated around an axis parallel to the rotary arm to draw up toner from the toner reservoir, and the opening of the rain gutter-like member faces downward, causing the toner to fall. At the moment when the rotary arm hits the stopper, it applies an impact to the rain gutter-like member, which disperses and supplies the toner to the upper part of the developer reservoir, thereby speeding up the diffusion of the toner into the developer. As a result, the concentration of the toner in the developer can be easily maintained and the print quality can be improved.

〔Example〕

Hereinafter, the gist of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a sectional view illustrating an embodiment of the present invention, FIG. 2 is a perspective view of the rotating arm in FIG. 1, and FIGS. 3 (a) and (b) show operating states of the rotating arm of the present invention. It is a diagram. Note that the same reference numerals indicate the same objects throughout the plan.

In FIG. 1, the developing device 17 includes a developer reservoir 18, a magnetic roller 10, an agitation roller 9, a cutting plate 15, and a magnetic roller 1.
It consists of a scraping plate 19 that scrapes off the toner adhering to the surface. The toner supply device 20 includes a toner reservoir 21 and a rotary arm (hole 23) having a gutter-like member A at the tip 22
is fixed to a shaft 24 parallel to the member, which shaft 24 is rotated by a motor 25. Note that a stopper 26 against which the rotary arm 22 abuts is provided on the partitioning device 27 on the side of the developer reservoir 18 above the toner reservoir 21 .

When the rotating arm 22 is rotated around the shaft 24, the toner 16 in the toner reservoir 21 is released into a gutter-like member as shown in FIG. 3(A).
The toner 16 that is scooped up as shown in FIG.
distributed at the top.

A developer 18 in which toner is dispersed is stirred and transported by a stirring roller 9, and is developed on a latent image forming member 1 by a magnetic roller 10.

Since the toner 16 is dispersed and supplied onto the developer 8 in this way, the toner 16 is quickly diffused into the developer 8, making it easier to maintain the concentration of the toner 16 in the developer 8, thereby improving print quality.

〔Effect of the invention〕

As explained above, according to the present invention, the toner can be distributed and supplied onto the developer, so that the toner is uniformly and quickly diffused into the developer, making it easier to maintain the toner concentration in the developer. Therefore, it is possible to improve printing quality.

[Brief explanation of the drawing]

FIG. 1 is a sectional view illustrating an embodiment of the present invention, FIG. 2 is a perspective view of the rotating arm in FIG. 1, and FIGS. 3 (a) and (b) show operating states of the rotating arm of the present invention. It is a diagram. FIG. 4 is a diagram for explaining the outline of a printer, and FIG. 5 is a sectional view showing a conventional developing device. 1ii-Country 7! ! □ In the figure, ■ is a latent image forming body, 8 is a developer, 9 is a stirring roller, 10 is a magnetic roller, 16 is a toner, 17 is a developer, 18 is a developer reservoir, 19 is a scraping plate, 20 21 is a toner supply device, 21 is a toner reservoir, 22 is a rotating arm, 23 is a hollow, 24 is a shaft, 25 is a motor, 26 is a stopper, and 27 is a partition plate. Tea 1 Prisoner 2 Dangusa 3 Tsukasa (Lola)

Claims (1)

[Claims] A toner supply device that supplies toner to a developing device used in a copying device, an electrophotographic recording method, a printing device using an electrostatic recording method, etc. A rotary arm having a means for supplying the developer to the developer reservoir, and a stopper for stopping the rotation of the rotary arm and scattering the toner held in the arm from the upper part of the developer reservoir. toner supply device.