JPS6028673A - Developing machine for electronic copying machine - Google Patents

Abstract

PURPOSE:To prevent thoroughly intrusion of iron powder and to improve durability by providing a pair of annular magnets so as to sandwich a bearing of a circular side plate of a blender in such a way that the same poles face each other. CONSTITUTION:A blender 2 rotates in a toner bottle 1 and agitates a developer by fins 11 of connecting bars 12, 12'. Annular magnets 3 are adhered to both sides of the disc 10 at the end of the blender 2 by using double-coated tapes or adhesive agents having moisture absorptive curability in such a way that the N poles face each other on the inside and outside. The magnets 3 are spaced at 2mm. from a shaft 9. Iron powder is magnetized around the magnets 3 and the iron powder intruding into the space between the magnets and the shaft 9 is also magnetized on the inside circumferential surfaces of the magnets 3 and is therefore prevented from intruding into the space between the bearing part 4 of the blender 2 and the shaft 9. The deveseal (the iron powder attracted to the magnet) 5 between the magnets 3 and the shaft 9 acts also as a seal to prevent intrusion of the iron powder into the bearing part 4 and the deveseal 5 is prevented by the repulsive force of the magnets from entering the inside of the bearing hole.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a developing machine for an electronic copying machine, and more particularly to a blender for mixing developer disposed in the developing machine.

In order to agitate the developer and maintain good co-movement, the toner bottle of the developing machine of the conventional technology 'rE child copying machine has a side wall 1a of the bottle, as shown in the vertical cross-sectional view of FIG. .

A blender that rotates around a shaft 9 fixed between the lbs is installed. This blender has two discs 10 and 10' at both ends of a shaft 9, and the angle between them and l1ll+9 is 180°I, and the discs are connected to two connecting rods 12 at the edges.
．． Supported from 12'ζ and connected (one piece 12.12' has many fins 11 facing inward at 45 degrees to the connecting rod)
When the blender rotates, the developer is stirred and mixed by the action of the fins. It is made of a bonded metal, and there is a small gap between the bearing and the support in order to allow the fixed shaft 9 to be loosely inserted.

The developer used in the developing machine consists of carrier 'γ and toner, and iron powder with a particle size of about 30 to 100 μ is usually used as the carrier, and this 7K K5) gets into the gap between the fixed shaft and the bearing. The bearing had to be periodically cleaned because it prevented the normal rotation of the blender and caused damage to the bearing.

OBJECT OF THE INVENTION The object of the invention is to provide a bearing and fixing device for a blender.
The purpose is to provide the current 13 aircraft in which iron powder from the carrier does not get into the space between the carrier and the carrier.

Structure of the Invention The present invention is a developing machine for an electronic copying machine, in which a pair of ring-shaped magnets are provided so as to sandwich a bearing provided on a circular side plate of a blender rotating inside a toner bottle, so that the same poles face each other. be.

The magnet provided in the bearing hole has a gap larger than that between the bearing and the shaft, and iron powder is magnetically attracted to the magnet in this gap.Hereinafter, the magnetically attached iron powder is referred to as a deveseal. ), this prevents iron powder from entering the bearing hole.

Also, since the pair of magnets are installed with the same poles facing each other, the repulsive force of each magnet causes the debenol to interact with the bearing +Ii
It does not enter the minute 1jf gap between +l+ and +l+.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings. Figure 2 is a schematic cross-sectional view of the developing machine.
Inside is a magnet roll 6 and an aluminum blender.
2 is provided. FIG. 3 is a cross-sectional view of the lower part of the toner bottle 1 equipped with the blender 2. Bren, p.
On both sides of the disc 10 at the --2ψ114 section, magnet rings 3 at -y1 are glued concentrically with the ah bearing so as to maintain a gap between the ring and the pin 1, which is larger than in the case of a bearing. This adhesion uses a moisture-curing double-sided tape, but it can also be done using an adhesive or the like. Brenta, 2 pigeons
It is rotatably mounted on a stainless steel shaft 9 fixed to the bottle l, and this blender 2 rotates within the toner bottle 1, and by the action of the fins l 1 o) attached to the connecting rods 12, 12'G. Stir the developer and develop ff.
The ml flow rate of 1 liter is maintained at J (good condition. Magnet ring 3 has a disk 4') 16, and the N poles are glued together 2' once on the inside and outside, and the magnetic ring 3 and '! There is a bipharyngeal gap between 'll+9. The iron powder in the developer is magnetically attached around the magnet ring 3,
Also, iron powder that has entered the gap with the shaft 109 is magnetically attracted to the inner peripheral surface of the magnet, so that it does not reach the gap between the bearing part of the blender 2 and the shaft 9. Sarako magnet ring 3
The debe seal 5 between and 0119 also acts as a seal to prevent iron powder from entering the bearing portion 4. Since the north poles of the pair of magnets face each other, each debeseal 5 does not enter the bearing hole due to the repulsive force of the magnets. In this embodiment, the north poles of the magnet ring 3 y face each other, but the south poles may face each other.

Effects of the Invention According to the present invention, iron powder is completely prevented from entering the Grender rMIt receiving portion, and the bearing portion is not damaged by iron powder (therefore, the durability of the bearing portion is extremely improved).

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a conventional blender, FIG. 2 is a schematic cross-sectional view of the developing machine of the present invention, and FIG.
FIG. 3 is a sectional view taken along line AA of one end of the lower part of the toner bottle. Symbols in the figure: 1...Gutter 1-4° bottle*1a11b...Inside of toner bottle 1: 2...-Render: 3...Magnet ring: 4...Bearing part; 5... debenrule 26
... Magnet roll nearer... Photoreceptor: 8... Developing machine: 9... Back: 1G110'... Disc; 11...
・Fin: 12.12'...Connecting rod. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In the developing machine of an electronic copying machine, which consists of a toner bottle, a blender that rotates around a shaft installed on both side walls of the toner bottle, and a magnet roll, a pair of ring-shaped magnets are held between the bearings of the blender so that the same poles are aligned. A developing machine characterized by being provided so as to face each other.