JPS6275567A - Developing device - Google Patents

Abstract

PURPOSE:To make it possible to loosen the inclination of the inwall of a hopper by arranging a vibration face plate in the hopper and finely vibrating the vibrating face plate interlocking with the rotation of a feeding body to move a developer in the hopper to a feed port. CONSTITUTION:The vibration face plate 36 consisting of a plate spring member of which one edge side is supported by a pressure foot 36 is arranged on the upper surface part of the modelately inclined inwall 31b of the hopper 31. The free edge part 37a side of the vibration face plate 37 is arranged adjacently to a feed roller 33 and plural projections 38 are formed between the vibration face plate 37 and the inwall 31b over the setting range of the vibration face plate 37. The free end part 37a of the vibration face plate 37 is pushed up and springed by pins 39 radially planted on both the end part sides of the rotary shaft 34 of the feed roller 33 on the basis of rotation of the feed roller 33 and the projections 38 are shocked by the spring force. The vibration face plate 37 is finely vibrated and toner T in the hopper 31 is moved to the feed roller 33 side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a developing device used, for example, in an electronic copying machine.

[Technical background of the invention and its problems]

Conventionally, this type of developing device, especially the main body of the supply device that attaches the developer to the surface of the image bearing member such as the photoreceptor, has been equipped with a hora! In a device that replenishes the developer stored in a hopper by rotating a developer replenishing body, the hopper and the hopper have both sloped inner wall surfaces at a steep angle to allow the developer to fall naturally. A bladed roller for scraping is provided separately from the developer replenishing roller disposed on the inner bottom surface, thereby replenishing the developer into the main body of the supply device.

However, in the above-mentioned conventional device, if the inner walls of the hot spring are made at a steep angle, the internal capacity may not be small, and if they are made at a gentle angle, the developer is
The scraping means that does not fall to the supply port on the inner bottom surface and uses a bladed roller has the problem of increasing the number of parts and increasing costs.

[Purpose of the invention]

The present invention was developed under the above circumstances, and an object of the present invention is to provide a developing device in which the angle of the inclined inner wall surface of the hopper is made gentle to increase the internal capacity. It is in.

[Summary of the invention]

In order to achieve the above object, the present invention provides a developing device comprising a supply body that supplies developer to a developing area, and a rotatable supply body that supplies the developer contained in a hopper to the supply body. In the apparatus, a moving plate that can vibrate by the rotational action of the replenisher is provided on one of both inclined inner wall surfaces of the hopper, and a protrusion is provided between the vibrating plate and the inclined inner wall surface of the hopper. This is a configuration in which the two elements are interposed.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the external appearance of an electronic copying machine incorporating a developing device of the present invention, and numeral 1 in the figure is the main body of the copying machine. A paper feed cassette 2 that can automatically or manually feed paper is installed on the right side of the copying machine main body 1, and a paper output tray 3 is installed on the left side of the cassette 2, in which originals (not shown) are placed. The left and right direction (arrow a) is
A document table 4 is provided which can freely reciprocate in the direction (direction). In the figure, reference numeral 5 denotes an operation display section such as a display 6, a numeric keypad 7, an exposure setting volume 8, and a print key 9, which are provided on the front edge of the upper surface of the copying machine main body 1.

Next, the internal mechanism of the copying machine main body 1 will be explained with reference to FIG.

In the figure, reference numeral 10 denotes a drum-shaped photoreceptor as an image carrier that is rotatably supported approximately at the center of the copying machine main body 1, and is moved in the direction of the arrow in synchronization with the document table 4 by a drive mechanism (not shown). It is designed to be rotatably driven. This photoreceptor 10
The original image uniformly charged by the charger 1 and uniformly irradiated by the exposure rung 12 is transferred onto the υ photoreceptor lO by the focusing light transmitter (trade name, SELFOC lens array) 13. The image is formed to form an electrostatic latent image, and a developer (hereinafter referred to as toner) is applied to this electrostatic latent image by a developing device described later to develop the electrostatic latent image. , a toner image) is sent to the transfer charger 14 side.

The transfer charter 14 is formed on the photoreceptor 10 on copy paper P or P' that is fed from a paper feed cassette 2 that is automatically or manually fed via a paper feed roller 15 and a pair of roller rollers 16 and 16. The copy paper P or P' after transfer is AC
(by a peeling charger 17 by corona discharge) photoreceptor 10
It is peeled off from above and passed through the conveyance path 18 to the fixing device 19.
The toner image is fused and fixed and is discharged onto a paper discharge tray 3 by a pair of discharge rollers 20.degree.

On the other hand, the residual toner on the photoconductor 10 after the toner image is transferred onto the copy paper P or P' is cleaned by the cleaning device 2, and the potential on the photoconductor 0 is lowered below a certain level by the static elimination run f22. Make the next copy operation possible.

Further, in the copying machine main body l, an upper frame and a lower frame (not shown) are pivotally supported to be openable and closable at a desired angle (for example, 30°) to each other, and the upper frame has a photoreceptor 1
θ, and a charger 11 around the photoreceptor 10,
Exposure rungs 2, focusing light transmission body 3. cleaning device 21,
Each device such as a static elimination rung 22 and a developing device to be described later is attached by appropriate means to constitute an upper unit, while a transfer charger 14, a peeling charger 17, a fixing device 19, and a pair of discharge rollers 20 are attached to the lower frame. .2
0, etc., and other mechanisms such as a power supply section (not shown) are attached to form the lower unit, and both units can be opened and closed with the conveyance path 18 of copy paper P or P' as a boundary for repair, inspection, etc. is facilitated.

23 in the figure is a developing device positioned around and facing the photoreceptor IO. The developing device 23 does not include a supply main body 24 that adheres and supplies toner T supplied from a toner cartridge (described later) to the surface of the photoreceptor 100 in a brush-like manner. A magnet roller 25 is composed of a rotating sleeve made of a non-magnetic material and a fixed magnet, which are placed in opposition to each other so as to adhere and supply the toner T to the surface, and this magnet, 7, and the layer thickness of the toner T adhered on the roller 25. Doctor 26, who regulates
A stirring roller 27 that stirs the toner T, and a scraper (not shown) that scrapes off the toner T that has not been subjected to development from the surface of the magnetic roller 25 and guides it to the toner scraping side of the stirring roller 27 are provided. At the same time,
A toner concentration detector 28 is installed on the lower outer wall of the feeder body 24, that is, behind the agitation roller 27, and is a magnetic sensor with a sensor portion 28a located close to it. This toner concentration detector 28 automatically detects the toner concentration inside the supply device main body 24 that is stirred by the stirring roller 27, and when the detected value of the toner concentration falls below a certain level, the toner concentration detector 28, which will be described later, By rotating the developer replenishing roller of the Litz type replenisher, a certain amount of toner T in the rollers 7 and 1 can be dropped and supplied into the main body 24 of the supplier.

A replenisher 30, which is entirely unitized, is removably mounted on the above-mentioned supplyer main body 24, and this replenisher 30 is a container in which the toner T to be replenished is accommodated in the supplyer main body 24. -31. This star-4'-3
1, as shown in FIGS. 3 and 4, the inner bottom surface 31*I
The IC replenishment port 32 is opened, and one inner wall surface 31b of the left and right inclined inner wall surfaces 31b and 31a is formed with a gentle inclination angle θ, and the inner bottom surface 31 & Facing developer supply roller 3
3 is rotatably supported via a rotating shaft 34.

This supply port 233 is rotationally controlled by a ratchet mechanism of a drive device (not shown) via a gear 35 mounted on one end of the rotating shaft 34, and may be operated by a signal detected by the toner concentration detector 28. It has become.

Furthermore, a gently sloped inner wall surface in the hopper 31,
A vibrating face plate 37 made of a plate spring member whose one end edge side is supported by a presser foot 36 is disposed on the upper surface portion of the vibrating face plate 71b.
A plurality of protrusions 38 are interposed between the vibrating face plate 37 and the inner wall surface 31b over the installation range of the vibrating face plate. 39 in the figure is a pin protruding radially from both ends of the rotation shaft 340 of the replenishment roller 33, which allows the rotation of the replenishment roller 33 to move the free end of the vibrating face plate 37. 7a to bounce elastically and hit the protrusion 38 with its elasticity, causing a slight vibration in the vibrating face plate 37 and transferring the toner T in the hollow 2-31 to the replenishing roller 33 side. It is designed to be moved to

By the way, on the upper surface of the developing device 23, there is a car<-4
The cover 40 allows the replenisher 30 and the developing device 23 themselves to be replaced and removed, and allows the document table 4 to be moved only when the cover 40 is in the closed state. It looks like this.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, Hola! - A vibrating face plate is disposed inside the hopper to cause slight vibrations in conjunction with the rotating action of the replenisher, and this moves the developer in the hopper to the replenishment port. This has the excellent effect of lowering costs because it is possible to make it more gradual, increasing the internal capacity of the hopper, and reducing the number of parts.

[Brief explanation of drawings]

FIG. 1 is an external view of an electronic copying machine incorporating a developing device according to the present invention, FIG. 2 is a sectional view schematically showing the internal structure of the electronic copying machine, and FIG. 3 is a diagram showing the developing device according to the present invention. FIG. 4 is a sectional view of the main parts of the replenisher, and FIG. 4 is a schematic plan view of the main parts. 1... Copying machine main body, T... Toner (developer). 23...Developing device, 24...Supplier main body, 30...
- Replenisher, 31... Hola N-1, 31b... Slanted inner wall surface 31c... Slanted inner wall surface, 32... Supply port,
33... Developer supply roller, 37... Vibrating face plate, 3
7a...Free end portion, 38...Protrusion. Applicant's Representative Patent Attorney Takehiko Suzue 4th Ward

Claims (3)

[Claims] (1) In a developing device consisting of a supply body that supplies developer to a portion to be developed, and a rotatable supply body that supplies developer stored in a hopper to this supply body, both inclined inner wall surfaces of the hopper are provided. A developing device characterized in that a moving face plate is provided on one side of the hopper and can be vibrated by the rotational action of the supply body, and a protrusion is interposed between the vibrating face plate and the inclined inner wall surface of the hopper. (2) The developing device according to claim 1, wherein a plurality of protrusions are provided over the installation range of the vibrating face plate. (3) The developing device according to claim 1, wherein a plurality of pins for elastically repelling the vibrating face plate are provided on the rotating shaft of the supply body.