JPS6032669Y2 - Manual toner replenishment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manual toner replenishing device in a developing device of an electronic copying machine.

Conventionally, in electronic copying machines that perform development using powder toner and iron powder carrier, if the toner concentration becomes too high (hereinafter referred to as overtoner), it will fog over the copy surface.
To prevent dirt, dirt inside the machine, dirt on the cleaning device, or deterioration of toner, carrier, etc., automatic toner replenishing devices are set so that the amount of replenishment does not exceed at least the amount of toner for normal documents.

Therefore, a phenomenon occurs in which the toner density becomes low for certain documents.

Further, when it is desired to make a slightly darker copy, for example, as shown in FIG. 1, by pressing down the manual replenishment lever 1 in the direction of the arrow, the shaft 2 is rotated in the same direction.

Then, the gear 4 is rotated counterclockwise as shown by the arrow via the gear 3 fitted onto the shaft 2.

(See FIG. 2) A toner replenishment roll 6 made of a porous material as shown in FIG. The rotation of the shaft 5 causes the toner replenishment roll 6 to rotate in the counterclockwise direction as indicated by the arrow, so that the toner 8 held in the air bubbles of the replenishment roll 6 is transferred to the developing device ( (not shown).

However, if a copy operation is started immediately after manually replenishing toner 8 into the developing device as described above, the effect of replenishment will not be immediately apparent, and in some cases, the toner will not be agitated because the toner has not been agitated by the amount of toner 8. The clumps of toner 8 directly adhere to the magnetic brush 9 and come into contact with a drum (not shown), resulting in a mottled copy.

Furthermore, since the effect of replenishment is not immediately apparent, the operator may mistakenly replenish toner 8 manually, resulting in over-toner.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to drive the developing device via a switch by operating the manual toner replenishment lever, and to sufficiently agitate the manually replenished toner to improve the copying effect. It is an object of the present invention to provide a manual toner replenishing device that achieves this.

An embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, and 4.

, f[, , Those with the same numbers are the same as the conventional ones, so the explanation is omitted.

In the figure, reference numeral 10 denotes a microswitch installed near the manual replenishment lever 1. By rotating the replenishment lever 1 and operating the microswitch 10, toner 8 is replenished and the toner 8 is stirred in the developing device. vessel (not shown)
is configured to be driven to agitate the toner 8.

Now, when the manual replenishment lever 1 shown in the first figure is pushed down in the direction of the arrow, the shaft 2, gear 3, gear 4, and shaft 5 are moved as described above.
The toner supply roll 6 is rotated counterclockwise as shown by the arrow.

Then, the toner 8 held in the bubbles of the toner supply roll 6 is scraped off by the bent portion 7a of the side wall 7 and falls into the developing device.

Moreover, in the present invention, a microswitch 10 communicating with an agitator (not shown) is disposed at the position where the replenishment lever 1 is pushed down.

Therefore, for example, by operating the manual replenishment lever 1 four or five times in succession, toner 8 is replenished into the developing device, and by pressing down the lever 1 and operating the switch 10, the agitator in the developing device is supplied. is driven to agitate the toner 8.

If you want to stir the toner 8 sufficiently, in the final lever operation, hold the replenishment lever 1 in the depressed position for about m seconds to keep the switch 10 in operation, so that the toner 8 in the agitation device can be stirred. can be sufficiently stirred.

Next, another embodiment of the present invention will be described based on FIG.

In the figure, reference numeral 10' denotes a microswitch, and this microswitch 10' is provided at a position where the manual replenishment lever 1 is pushed down in the direction of the arrow and simultaneously changes from 1-close to 1-open. It is configured to drive the agitator when it is in the 1-open state.

Therefore, when the manual replenishment lever 1 is pushed down, the microswitch 10' becomes fully open and the developing device is agitated, which has the advantage of allowing the agitation time to be maintained for a long time.

As explained above, in the present invention, a microswitch is disposed near the manual replenishment lever, and when the replenishment lever sets the microswitch to the 1st closed or 1st open state, the agitator of the developing device immediately starts stirring. It is characterized by being able to carry out the following.

Therefore, it is possible to obtain copies with appropriate density from the first copy, solve various problems related to overtoner, and have practical effects such as being almost the same in price as conventional devices. be.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing the external appearance of the toner replenishing section and the developing device, FIG. 2 is a right side view showing the toner replenishing mechanism, FIG. 3 is a longitudinal sectional view showing the toner replenishing roll of the toner replenishing section, The figure shows one embodiment of the present invention, and is a front view of a toner replenishment station in which a switch for driving an agitator is installed near the manual toner replenishment lever. Figure 5 shows another embodiment of the present invention. FIG. 2 is a front view of main parts of the manual toner replenishing device shown in FIG. 1...Manual toner replenishment lever, 8...
・Tona, 10.10'...Switch (micro switch).

Claims (1)

[Scope of utility model registration request] A developing device having a manual toner replenishment lever and an agitator includes a switch that is energized by the manual toner replenishment lever and controls driving of the agitator, and the developing device is activated by operating the manual toner replenishment lever. A manual toner replenishing device characterized in that, at the same time as replenishing toner, the switch is energized to drive an agitator to agitate the developer.