JPS604182Y2 - Developer stirring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developer stirring device that equalizes the developer toner content within the developing machine over the entire development area and conveys the developer to the developing roll.

The developing device of a copying machine generally uses a two-component developer consisting of a carrier called a carrier and a colored powder called a toner that is electrostatically bonded to the carrier.These developers are used during the copying process. Since toner is consumed as the number of copies increases, toner must be constantly replenished in relation to the amount of copies to be made.

At this time, in order to agitate the developer with less toner and new toner, multiple augers A are used in the developer storage section.
(A shaft-like type with spiral blades) or a type with a plurality of intersecting gutter called a cross mixer in the developer fall path.

However, as shown in Figure 1, although the former can move the developer in the direction of the rotation axis a, it does not have the ability to move the rotation axis a in the perpendicular direction, and its ability to stir the developer is low. There are drawbacks and high costs cannot be avoided.

In addition, the latter has a shape as shown in Figure 2, and it is necessary to lift the developer to a high place and drop it into the cross mixer C, which is mechanically constrained and requires stirring of the developer that has fallen into the developer reservoir. The drawback was that he was incompetent.

The present invention was developed in view of the above circumstances, and its purpose is to greatly improve the agitation and conveyance capabilities of the developer, and to enable use in narrow areas.
Moreover, it is an object of the present invention to provide a developer stirring device that does not require a plurality of rotating shafts (that is, a developer stirring device that is low in cost and that makes it easy to attach and detach a mixing plate).

Hereinafter, the present invention will be explained with reference to FIG. 3 and subsequent figures.

What is shown in FIG. 3 is a developing machine.

The developing machine includes a housing 1 as a developing container,
A developing roll 2 is housed within the housing 1, and a developer stirring device 5 is provided in a developer storage section 4 of the developing machine.

The developer stirring device 5 includes a holding member 6 like a cap, and a rotating shaft 7 is attached to the holding member 6.

The holding member 6 holds the conveying member 8 at the outer end of the circle.

A fixed angle screw 9 may be used as the holding means.

A plurality of slit-shaped fitting grooves 10 are formed in the conveying member 8 by slicing or the like, and the fitting grooves 1 of both conveying members 8
The mixing plate 11 is attached to the conveying member 8 by fitting both ends of the mixing plate 11 into the conveyor member 8.

Alternatively, the conveying member 8 may have a circular cross section, the fitting groove 10 may be formed by lathe processing, and the mixing plate 11 may be fitted into the fitting groove 10.

(See Fig. 7) The mixing plate 11 may have bent portions 13 bent in opposite directions on both sides of the plate body 12 as shown in Fig. 9, or as shown in Fig. 10. As shown, it may be elliptical, and its shape is not particularly limited.

When the developer agitating device 5 configured as described above is rotated, the developer is agitated together with the toner by the mixing plate 11 for good cross-mixing, and the cross-mixed developer is transferred to the developing roll by the conveying member 8. Pushed out to the 2nd side.

Note that the rotating shaft 7 may be a single piece, and in this case, the rotating shaft 7 passes through a hole 11a provided in the mixing plate 11.

The present invention has been described in detail above, and the holding member 6 fixedly holds a plurality of long conveying members 8 in the axial direction of the rotating shaft 7, and the conveying member 8 fixedly holds a plurality of mixing plates 11. Since the rotating shaft 7 is provided on the holding member 6, the ability to stir the developer and the ability to convey the developer can be greatly improved.
Moreover, it can be used in a narrow area, and moreover, it does not require multiple rotating shafts, resulting in a low cost product.

Furthermore, since the mixing plate 11 is not fixed to the rotating shaft 7 but is held by the conveying member 8, the work of attaching and detaching the mixing plate 11 is facilitated.

[Brief explanation of the drawing]

1 and 2 are configuration explanatory diagrams of a conventional developer agitation device, FIG. 3 is a configuration explanatory diagram of a developing machine equipped with a developer agitation device according to an embodiment of the present invention, and FIG. 4 is a configuration explanatory diagram of a developer agitation device according to an embodiment of the present invention. 5 is a sectional view taken along the line ■-■ in FIG. 4; FIG. 6 is an exploded view of the present invention-embodiment; FIG. 8 is a sectional view of another embodiment of the present invention,
9 and 10 are perspective views of the mixing plate, respectively. 6 is a holding member, 7 is a rotating shaft, 8 is a conveying member, and 11 is a mixing plate.

Claims (1)

[Scope of utility model registration request] The holding member 6 fixedly holds a plurality of long conveying members 8 in the axial direction of the rotating shaft 7, the carrying member 8 fixedly holds a plurality of mixing plates 11, and the holding member 6 was provided with the rotating shaft 7. A developer stirring device characterized by: