JPH075491Y2 - Toner stirring device for developing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for stirring toner in a developing machine.

[Conventional technology]

In a developing machine in which a developing roll is provided in the housing and the electrostatic latent image on the photosensitive material is developed by the developing roll, a toner box for agitating toner in the housing or supplying toner to the housing It is necessary to stir the toner inside.

Therefore, conventionally, as shown in FIG. 5 and FIG. 6, for example, a spiral wire 2 is arranged in a housing 1, and one end 2a in the longitudinal direction and the other end 2b in the longitudinal direction of the spiral wire 2 are attached to the housing. 1 is rotatably supported on both side walls 1a, 1a, and the toner is agitated by rotating the spiral wire 2.

In FIG. 5, 3 is a toner conveying auger, 4 is a blender, 5 is a developing roll, 6 is a trimmer, 7 is a chute,
Reference numeral 8 is a photosensitive material, and in FIG. 6, 9 is a toner conveying port.

[Problems to be solved by the device]

In such a stirrer, when the spiral wire 2 interferes with the inner wall of the housing 1, the rotation resistance becomes remarkably large. Therefore, the stirrer is arranged with a gap from the inner wall.

Therefore, the toner is not agitated in the gap between the spiral wire 2 and the inner wall, especially the gap between the bottom wall, and the toner stays in that portion.

Therefore, it is an object of the present invention to provide a toner stirring device for a developing machine, in which toner can be stirred without staying between the spiral wire and the bottom wall, and rotation resistance does not become too large.

[Means and Actions for Solving the Problems]

In a developing machine in which a developing roller 5 is rotatably provided in a housing 1 and an electrostatic latent image on a photosensitive material is developed by the toner accommodated in the housing 1 by the developing roller 5, both side walls 1a, a of the housing 1 are provided. A supporting shaft 15 is rotatably supported substantially parallel to the developing roll 5, and the supporting shaft 15 is connected to a drive source. The supporting shaft 15 has a larger diameter than the supporting shaft 15 and the inside of the housing 1. The spiral wire 2 for stirring the toner of
The spindle 15 is provided so as to penetrate the inside of the spiral wire 2 so that the spiral wire 2 is substantially parallel to the developing roll 3, and one end 2a in the longitudinal direction of the spiral wire 2 and the spindle.
15 is a toner stirring device for development, in which the spiral wire 2 is connected so as to rotate together with the support shaft 15.

As a result, the other end 2b in the longitudinal direction of the spiral wire 2 is formed.
Is in a free state and is in contact with the bottom wall 1b by its own weight, so that no gap is created between the spiral wire 2 and the bottom wall 1b, and the toner can be agitated without staying in that portion. At the same time, the other end 2b in the longitudinal direction is in the free state, so that the rotation resistance does not increase so much.

In a developing machine in which a developing roll 5 is rotatably provided in the housing 1 and the electrostatic latent image on the photosensitive material is developed by the toner contained in the housing 1 by the developing roll 5, a developing roll 5 is provided in the bottom wall 1b of the housing 1. A support shaft 15 is provided with a spiral wire 2 for agitating the toner in the housing 1 substantially parallel to the developing roll 5, and one longitudinal end 2a of the spiral wire 2 is rotatably supported on a side wall 1a of the housing 1. The ring part 15
A toner agitating device for a developing machine in which the spiral wire 2 is inserted into b to rotate the spiral wire 2 by a support shaft 15 and the support shaft 15 is connected to a drive source.

Thereby, one end 2a in the longitudinal direction of the spiral wire 2 is formed.
Since it is fitted in the ring portion 15b of the support shaft 15, the spiral wire 2 is in contact with the bottom wall 1b by its own weight, so that the entire length of the spiral wire 2 in the longitudinal direction is in contact with the bottom wall without a gap. The toner can be agitated without staying in that portion, and since one end of the spiral wire 2 in the longitudinal direction is rotated by the support shaft 15, the rotation resistance does not become too large.

〔Example〕

As shown in FIG. 1, a support shaft 15 is rotatably provided horizontally between the side walls 1a, 1a of the housing 1, and a spiral wire 2 having a diameter larger than that of the support shaft 15 is attached to the support shaft 15. The support shaft 15 is provided so as to penetrate through the spiral wire 2, one end 2a in the longitudinal direction thereof is fixed to the support shaft 15, and the other end 2b in the longitudinal direction is in contact with the inner wall, particularly the bottom wall 1b by its own weight. As shown in FIG. 2, the support shaft 15 is connected to a motor 12 through gears 10 and 11, and the motor 12 is connected to a controller.
A drive signal is output from 13 based on the toner replenishment signal, and a gear 10 is connected to the toner conveying auger 3 via a gear 14.

As shown in FIG. 3, one end 2a in the longitudinal direction of the spiral wire 2 may be fitted in the hole 15a of the support shaft 15.

Further, as shown in FIG. 4, one end 2a in the longitudinal direction of the spiral wire 2 is fitted into the ring portion 15b of the support shaft 15 to support the support shaft 15
Alternatively, the spiral wire 2 may be rotated.

Although not shown, both ends of the spiral wire 2 may be displaceably connected to a support shaft supported on both sides, for example, as shown in FIG. Even if it becomes a measure, it does not bend under load.

Further, it is needless to say that it can be applied as a device for stirring the toner in the toner box.

[Effect of device]

(1) Since the other end 2b of the spiral wire 2 in the longitudinal direction is in a free state and is in contact with the bottom wall 1b by its own weight, there is no gap between the spiral wire 2 and the bottom wall 1b. The toner can be agitated without remaining in the portion, and the other end 2b in the longitudinal direction is in a free state, so that the rotational resistance does not increase so much.

Moreover, since the support shaft 15 is supported over both side walls 1a, 1a of the housing 1, it can rotate stably without swinging when rotated by the drive source, so that the spiral wire 2 also rotates stably. The bottom wall 1b of the housing 1
There is no strong hit.

(2) One end 2a in the longitudinal direction of the spiral wire 2 is a spindle.
Since the spiral wire 2 is in contact with the bottom wall 1b by its own weight because it is fitted in the ring portion 15b of 15, the total length in the longitudinal direction of the spiral wire 2 is in contact with the bottom wall without forming a gap, and that portion In addition, the toner can be agitated without staying in the toner, and since one end of the spiral wire 2 in the longitudinal direction is rotated by the support shaft 15, the rotation resistance does not increase so much.

Moreover, the spiral wire 2 can be connected to and separated from the support shaft 15 by inserting or withdrawing the longitudinal end 2a of the spiral wire 2 into the ring portion 1b of the support shaft 15, and the spiral wire 2 can be easily replaced. Become.

[Brief description of drawings]

1 and 2 are longitudinal sectional views showing a first embodiment of the present invention,
Transverse sectional views, FIG. 3 and FIG. 4 are longitudinal sectional views of the second and third embodiments, and FIG. 5 and FIG. 6 are longitudinal sectional views and transverse sectional views of the conventional example. 1 is a housing, 2 is a spiral wire.

Claims (2)

[Scope of utility model registration request] 1. A developing machine in which a developing roll 5 is rotatably provided in a housing 1, and an electrostatic latent image on a photosensitive material is developed by the toner contained in the housing 1 by the developing roll 5. A support shaft 15 is rotatably supported substantially parallel to the developing roll 5 across both side walls 1a, 1a.
To the drive source, and to the support shaft 15, a spiral wire 2 having a diameter larger than that of the support shaft 15 and stirring the toner in the housing 1,
The spindle 15 is provided so as to penetrate through the spiral wire 2, and the spiral wire 2 is substantially parallel to the developing roll 3, and the longitudinal end 2a of the spiral wire 2 and the spindle.
15. A toner stirring device for a developing machine, characterized in that the spiral wire 2 is connected so as to rotate together with the support shaft 15. 2. A developing machine in which a developing roll 5 is rotatably provided in a housing 1, and an electrostatic latent image on a photosensitive material is developed by the toner contained in the housing 1 by the developing roll 5. Inside the bottom wall 1b, a spiral wire 2 for stirring the toner in the housing 1 is provided substantially parallel to the developing roll 5, and one end 2a in the longitudinal direction of the spiral wire 2 is freely rotatable on the side wall 1a of the housing 1. Ring part of the support shaft 15 supported on
A toner stirring device for a developing machine, characterized in that the spiral wire 2 is inserted into a shaft 15b to rotate the spiral wire 2, and the shaft 15 is connected to a drive source.