JPS60239776A - Toner supply device - Google Patents

Abstract

PURPOSE:To prevent the state, where the quantity of toner supply is increased, from being left, by making it possible that an operator switches the state to this state manually and resetting this state to the preset state automatically by an automatic reset mechanism. CONSTITUTION:A Geneva wheel 11 is connected by a shaft 2 and a friction clutch 13, and a knob 14 which the operator rotates and operates in the direction of an arrow D while pulling in the direction of an arrow C is provided. The operator rotates this knob manually so that it is switched from a position corresponding to the normal position to a position corresponding to increase set. When the operator turns the knob 14 in the direction of the arrow D while pulling it in the direction of the arrow C and moves slightly a wall part 12 in the direction of an arrow 12, the fitting state to a dispense roll 3 is loosened to widen the gap, and the quantity of toner dropping is increased. This state is not left as it is, and a shaft S2 restores the fitting state to the dispense roll 3 to the original state while rotating slightly by rotation of a dispense roll shaft S1, and therefore, the knob is reset to the normal position automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a 3' toner supply device for supplying toner to a developing machine such as a copying machine.

[Prior art]

As shown in FIG. 1, the toner supply device that supplies toner to the developing machine includes a toner bottle (2) for storing toner (1).
) is provided with a toner dispensing roll (3) made of urethane or the like, and this is driven directly or indirectly by a dispenser smoke or a clutch to drop the toner (1) as it rotates in the direction of arrow r. The structure is such that a constant minute amount is supplied to the developing machine per unit time.

Additionally, some of these toner supply devices have an adjustment device that automatically adjusts the toner concentration in the developer.
In that case, control is performed based on a block diagram as shown in FIG. That is, the following eight pieces of information are given to the CPU (4). One is regarding the number of copies (5), and the other is by comparing the results of patch development and density measurement using copy samples (6) at predetermined sampling intervals with a reference value. information from the comparator (7) obtained, and the other one
The first is information from the automatic density control device (8) regarding the number of points preset according to the copy size. C
The PU (41) gives a signal to the disben smoke control unit (9) in accordance with this information to control the rotation time of the disben smoke.

However, such toner supply devices cannot respond to the request to quickly increase the amount of toner in the developing machine, and especially in toner supply devices equipped with an automatic toner concentration adjustment device, the amount of toner in the developer cannot be increased. When the toner concentration in the toner drops suddenly, it takes time to recover it as shown in FIG. 8, and the operator cannot manually adjust the toner concentration to immediately recover it.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to enable an operator to increase the amount of toner to be supplied as necessary, and also to prevent the toner from being left unattended with an increased amount set.

[Structure of the invention]

In order to achieve the above object, the present invention enables an operator to manually switch a supply mechanism capable of switching to a state in which the amount of toner supplied is increased using an operating member, and also automatically sets the supply mechanism to increase the amount of toner supplied by an automatic return mechanism. The device is configured to return from the state to the preset state.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Fig. 4 shows the structure of the toner bottle (2) in an apparatus according to an embodiment of the present invention. Geneva gear, +111 is axis S
The Geneva wheel (I2) fixed to 2 is a wall that divides a part of the bottom into which the toner dispensing roll (3) is fitted. It is switchable so that it can be moved by an amount, and when the dispense roll shaft S rotates, it is automatically moved in the direction of arrow B and returned to the state shown in the figure. Figures 5 and 6
The figure shows the Geneva gear (10) and Geneva wheel (11).
), a sector gear is formed on the Geneva wheel (11) only between the angle θ, and if the distance between the dispense roll axis S1 and the axis S2 is X, then the dimensional relationship of each part is is T(d1+d3)-X1(
d2+d4)≦X.

As shown in FIG. 7, the Geneva wheel (11) is connected to the shaft (2) by a friction clutch +131. There is also a knob (141) that the operator rotates in the direction of the arrow C while pulling it in the direction of the arrow C, and the knob (14J is marked with a mark (151) as shown in Figure 8 to control the amount of toner supplied. If the operator wants to increase the amount, the operator should move it from the position corresponding to the normal position of the
Manually rotate it to the position corresponding to the ``increasing set''.

When the operator turns the above-mentioned knob (12) in the direction of the arrow while pulling it in the direction of the arrow C, and moves the above-mentioned wall part (12) by a small amount in the direction of the arrow, the state of engagement with the dispense roll (3) is loosened. This increases the gap, thereby increasing the amount of toner falling.Furthermore, this state is not left as is; the rotation of the dispense roll shaft S1 causes the shaft S2 to rotate by a minute amount, and the dispense roll (3 ) returns to its original state, so it can automatically return to the normal position.For this reason, if the toner concentration in the developer suddenly decreases, and you want to increase the amount of toner supplied from the toner supply device. Even if the toner supply device is equipped with an automatic toner concentration adjustment device, the amount can be easily increased by the operator, and the increased amount can be prevented from being left unattended, and the toner automatically returns to the preset state. This prevents overdosing.

〔Effect of the invention〕

As described above, the present invention has the advantage that the amount of toner supplied can be easily and quickly increased by the operator as needed, and that an excessive increase in the amount of toner can be prevented without leaving the increased amount set.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram of a conventional toner supply device, Fig. 2 is a block diagram of an automatic toner density adjustment device, Fig. 3 is a toner density characteristic diagram thereof, and Fig. 4 is a structure showing an embodiment of the device of the present invention. Figure 5 is a partial view of the Geneva gear used in the device, Figure 6 is a partial view of the Geneva wheel, and Figure 7 is a partial view of the Geneva wheel.
The figure is a structural diagram of the manual operation section, and FIG. 8 is a right side view of FIG. 7. Code explanation (10)...Geneva Gear, (Ill...
・Geneva wheel (contact...wall part (I4)...
...Knobu Patent Applicant Fuji Cellosox Co., Ltd. Agent Tomohiro Nakamura Patent Attorney Katsuo Naruse Figure 11 Figure 2 (2) 3 ■ Sweat, 'Otsu F Section No. 8 p4

Claims (1)

[Claims] Equipped with a supply mechanism that can be switched to a state where the amount of toner supplied is increased, an operating member that is manually operated by an operator to switch the supply mechanism, and an automatic return mechanism that automatically returns to the normal position from the state where the amount of toner is set to increase. A toner supply device characterized by: