JPS63221364A - Toner replenishing device - Google Patents

Abstract

PURPOSE:To facilitate attachment and detachment of developing devices by disposing respective toner replenishing devices to be connected to the plural developing devices in the state of units separated from the body of the developing devices and constituting said devices in such a manner that the devices can be turned from to the posture retreated from the posture to permit toner replenishment. CONSTITUTION:A base member 6 mounted with the toner replenishing devices 7, 8, 9 for housing toners of respective colors; red, blue and black can be turned to the retreat posture from the position where the toner replenishment is possible by means of a handle 64 as a hinge member 61 integral to the right side end of the base member and a hinge member 18 fixed to a panel are hinged to each other via a vertical shaft 19. The toner replenishing devices 7, 8, 9 are retreated simultaneously from the front faces of the developing devices 3, 4, 5 when the base member 6 is turned by the handle 64 while the operation of the copying machine is held stopped; therefore, the respective developing devices 3, 4, 5 can be easily taken out. In addition, the developing devices are constructed to the smaller size and the disposition thereof in proximity to a photosensitive drum 11 is possible.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a toner replenishing device capable of replenishing toner to each of a plurality of developing stations installed in an electrostatic recording device.

[Background of the invention]

In a color electrophotographic copying machine, a color toner image is usually formed by combining toner images of each car color such as red, blue, and black, so when facing the surface of the photoreceptor drum, toner of each color, for example, red, blue, and black is combined. 3 developed images stored! ! +? ! The method uses a method in which the toner images of each single color are superimposed by repeatedly rotating the drum. Therefore, it is necessary to replenish each developing device with a different single color toner, so each developing device is equipped with its own dedicated toner replenishing device, and the toner replenishing device is activated based on the image density detection result. However, each developing device is configured so that it can always develop an image with a constant toner density.

[Problems to be solved by the invention]

On the other hand, a block statue! As is well known, the device is often cleaned and inspected to remove toner lumps and foreign matter (it is removed from the copying machine each time), but in the case of color electrophotographic copying machines, the toner replenishing device is integrated as mentioned above. However, since the developing device is large and has multiple parts, it takes a lot of effort and time to remove and install the developing device.The present invention solves this problem and improves it. The object of the present invention is to provide a toner replenishing device in which each toner replenishing device is disconnected from a developing device and evacuated so that the devices can be removed and installed individually.

[Means to solve the problem]

The above object is to attach a plurality of toner replenishing devices to a single base member, each replenishing toner to a plurality of developing devices, and to replenish toner around a vertical shaft provided on the base member. This is achieved by a toner replenishing device that is capable of rotating from a position to a retracted position.

[yl example]

An embodiment of the invention is shown in FIGS. 1 and 2. Figure 1 shows the front of the toner replenishing device of the present invention, and Figure #2 shows its top. 1 is a pedestal made up of a pair of front and rear panels that are fixed to the main body of the copying machine, and the space between the panels is The photoreceptor drum 2 and other image forming equipment are mounted and supported. 2 is a developing gamma laser formed by a pair of front and rear side plates that are integrally connected via a stay, and 3 is installed between the side plates.
Developing devices 3.4 and 5 containing toners of red, blue, and black colors are placed and housed in separate developing trays (not shown) from above, respectively. The developing rack 2 is provided with a pair of elongated holes 21 in the upper part of the both side plates.
However, in addition to being engaged with the idle pins 12, a pair of protruding portions protruding toward the inner surfaces of both panels of the pedestal 1 are also supported and guided by an idle rail (not shown), so that a predetermined horizontal slide can be achieved. The press pin 22, which is assembled in such a way as to be attached to the lower part, is pressed leftward by the cam member 14 which rotates around the support shaft 13 of the pedestal 1, thereby causing the space between it and the fixed bin 15 of the pedestal 1 to be pushed to the left. It has come to occupy the position shown in the figure against the biasing force of the tension spring 16 which is stretched thereon. At this position, each of the developing sleeves 31, 41, and 51 of the developing units [3, 4, and 5] can maintain a predetermined distance from the surface of the photosensitive drum 11. 6 is a base member that supports the toner supply device, and its right g
A hinge member 61 integral with the A end is hinged to the hinge member 1 fixed to the bent portion 17 of the front panel of the pedestal 1 via the vertical shaft 19, and is attached to the pedestal 1 as shown in the figure. On the other hand, when the base member 6 is in the closed position, the pair of reference bottles 62 installed on the inner surface of the base member 6 fit into the reference holes provided in the pedestal 1, and the relative positions are regulated and the position is maintained. It is fixed in the closed position by a set screw 63. The base member 6 has red, blue,
Toner supply device lI7.8 that stores toner of each color of black
．． 9 is installed and in the closed position relative to the pedestal 1 as shown, each of the toner replenishing devices 7, 8.
The replenishment ports of the replenishment cylinders 73, 83, and 93 protruding from each of the openings 32 of the respective developing devices 3.4.5
．． 42.52. Therefore, when the detection result of the image density requires the replenishment of red toner, for example, when the motor (not shown) that drives the toner replenishing device 7 is turned on, the toner agitating member is actuated via the gear train G. Scrambler 71.72
At the same time, the conveyance screw 74 is rotated, and its propulsion causes the red toner contained therein to fall from the replenishment port and to be replenished into the developing device r13 through the opening 32. *The blue and black color toners are also supplied from the toner replenishing device 8.9 to the developing device by the same means as described above! ! 4
．． Toner can be replenished for each of the toners 5 and 5. Further, when the base member 6 is rotated by more than 90 degrees counterclockwise in FIG. 2 using the handle 64 about the vertical axis 19 while the operation of the copying machine is stopped, the toner replenishing device 7.8.9 At the same time, since the developing device I3.4.5 is retracted from the front side, each developing device can be removed after rotating the cam member 14 clockwise and returning the developing unit 2 to the right. It looks like this.

【Effect of the invention】

Each toner supply connected to multiple developing devices according to the present invention! Separate the device from the developing device main body and place it as a unit on the front side of the developing device, and develop freely! Provided is a toner replenishing device that can be retracted from the front side of a photoreceptor, and the toner replenishing device is made compact so that it can be disposed close to a photosensitive drum and can be easily removed and installed. It was decided that

[Brief explanation of the drawing]

FIG. 1 is a front view showing the arrangement and mounting type of the toner replenishing device of the present invention, and FIG. 2 is a top view of the main parts thereof.

Claims (1)

[Claims] A plurality of toner replenishing devices each replenishing toner to a plurality of developing devices are attached to a single base member, and are evacuated from a position that enables toner replenishment with a vertical axis provided on the base member as the center of rotation. A toner replenishing device characterized by being able to rotate to any position.