JPS636747Y2 - - 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.

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 bound to the carrier. As toner is consumed as printing is performed, this 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, it is conventional to use a plurality of augers A (shaft-shaped ones with spiral blades) in the developer storage section or a developer falling path. There is a type called a cross mixer that has multiple gutter that intersect.

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 a direction perpendicular to it, and its ability to stir the developer is low. There are drawbacks,
High costs cannot be ignored either. 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 the developer that has fallen into the developer reservoir. The drawback was that he had no ability.

The present invention was developed in view of the above circumstances, and its purpose is to greatly improve the agitation ability of the developer, to enable use in a narrow area, and to allow use of multiple rotating shafts. An object of the present invention is to provide an unnecessary and low-cost developer stirring device.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5.

FIG. 3 schematically shows a developing machine, and the developing machine is equipped with a housing 1 as a developing container.
A developing roll 2 and a paddle wheel 3 are housed within the housing 1, and a developer stirring device 5 is provided in a developer storage section 4 of the developing machine.

This developer stirring device 5 includes a single plate 6 having a predetermined width and length, and rotating shafts 7, 7 are provided at both longitudinal ends of the plate 6, respectively.

The plate 6 is inclined at a predetermined angle with respect to the rotational center line s of the plate 6 connecting the rotation axes 7, 7, and is perpendicular to the surface of the plate 6, and each of the plate 6 A large number of flat guide plates 8 are attached at equal intervals in the longitudinal direction of the plate 6 so as to protrude from the surface. Furthermore, paddles 9 facing in opposite directions are formed on the edge of the plate 6 in the width direction.

When the developer stirring device 5 configured as described above is rotated about the rotating shafts 7, the developer is scooped up as the plate 6 rotates.
As the plate 6 stands up, the developer on the plate 6 falls obliquely along the flat guide plates 8, 8, . . . This smooth fall of the developer in the diagonal direction causes the developer to move smoothly in the axial direction, and together with the scooping up of the developer as the plate 6 rotates, cross-mixing is promoted.

In the above embodiment, the developer stirring device 5
is used to scoop up the developer accumulated at the bottom of the developer storage section 4 and then let it flow down diagonally, but as shown in FIG. It can be used in any case, and can be applied to any developing machine that performs two-component development. Further, the plate 6 is provided with paddles 9 on the edge in the width direction.
is not necessarily necessary.

As mentioned above, the developer stirring device according to the present invention has the following features:
Rotating shafts 7, 7 are provided at both ends in the longitudinal direction of a single plate 6 having a predetermined width and length, while a rotation center line s of the plate 6 connecting the rotating shafts 7, 7 The flat guide plates 8, 8 are arranged so as to be inclined at a predetermined angle, perpendicular to the surface of the plate 6, and protrude from each surface of the plate 6, respectively.
... are provided at equal intervals in the longitudinal direction of the plate 6, so when the plate 6 is rotated about the rotating shafts 7, 7, the developer is scooped up by the plate 6, and as the plate 6 stands up, the developer is The agent is a flat guide plate 8, 8...
This diagonal fall causes the developer to move smoothly in the axial direction, and together with scooping up the developer as the plate 6 rotates, cross-mixing occurs. is promoted. Moreover, the guide plate 8,
8... has a flat plate shape, so that the scooped up developer flows down smoothly and collides with the developer in the reservoir 4 to promote the stirring effect. Since the guide plates 8, 8, .

[Brief explanation of the drawing]

1 and 2 are configuration explanatory diagrams of a conventional developer stirring device, FIG. 3 is a configuration explanatory diagram of a developing machine equipped with a developer stirring device according to the present invention, and FIG. 4 is an illustration of an implementation of the present invention. A perspective view of an example, FIG. 5 is an explanatory view of an example of use of the developer stirring device according to the present invention. 6 is a plate, 7 is a rotating shaft, and 8 is a guide plate.

Claims (1)

[Scope of utility model registration request] Rotating shafts 7, 7 are provided at both longitudinal ends of a single plate 6 having a predetermined width and length;
The plate 6 is inclined at a predetermined angle with respect to the rotational center line s of the plate 6 connecting the rotation axes 7, 7, is perpendicular to the surface of the plate 6, and is formed from each surface of the plate 6. Flat guide plates 8,
A developer stirring device characterized in that a large number of 8... are attached at equal intervals in the longitudinal direction of the plate 6.