JPH0329959U

JPH0329959U -

Info

Publication number: JPH0329959U
Application number: JP9080889U
Authority: JP
Priority date: 1989-08-01
Filing date: 1989-08-01
Publication date: 1991-03-25
Anticipated expiration: 2004-08-01
Also published as: JP2502386Y2

Description

[Brief explanation of drawings]

第１図は、本考案の一実施例を示す現像剤搬送
装置の断面図、第２図は、同上のスクリユーモー
タ正・逆転駆動回路を示す図、第３図は、同上の
制御部の動作を示すフローチヤートを示す図、第
４図は、本考案の別実施例を示す現像剤搬送装置
、第５図は、同上のスクリユーモータ正・逆転駆
動回路を示す図、第６図は、同上の制御部のフロ
ーチヤートを示す図、第７図は、従来の現像剤搬
送装置の断面図、第８図は、他の従来の現像剤搬
送装置の断面図である。１……ホツパー、２……連結パイプ、３……ス
クリユーコンベア、７，７ＢＫ，７Ｍ，７Ｃ，７
Ｙ……スクリユーモータ、３１……現像剤検出セ
ンサー。 FIG. 1 is a sectional view of a developer conveying device showing an embodiment of the present invention, FIG. 2 is a diagram showing a screw motor forward/reverse drive circuit of the same as above, and FIG. 3 is a diagram of a control section of the same as above. FIG. 4 is a flowchart showing the operation; FIG. 4 is a developer conveying device showing another embodiment of the present invention; FIG. 5 is a diagram showing the same screw motor forward/reverse drive circuit; FIG. FIG. 7 is a cross-sectional view of a conventional developer conveying device, and FIG. 8 is a cross-sectional view of another conventional developer conveying device. 1...Hopper, 2...Connecting pipe, 3...Screw conveyor, 7, 7BK, 7M, 7C, 7
Y...screw motor, 31...developer detection sensor.

Claims

[Claims for Utility Model Registration] 1. A hopper containing a developer; a container for receiving the developer from the hopper; and connecting the hopper and the container to each other.
a connecting pipe protruding from the bottom of the hopper toward the container; and connecting the container and the outer end of the connecting pipe by moving the container and the connecting pipe relatively in the axial direction of the connecting pipe. a screw which is provided from the bottom of the hopper to the outlet of the connection pipe and replenishes the developer in the hopper to the container through the connection pipe when rotated in the normal direction; a conveyor, a motor that rotates the screw conveyor, a motor drive circuit that rotates the motor in forward and reverse directions, and a developer detection sensor provided in the hopper that detects the presence or absence of developer in the hopper. and when the developer detection sensor detects that there is no developer, the motor drive circuit reverses the motor to reverse the screw conveyor and remove the developing material in the connecting pipe. A developer transport device characterized in that the developer is returned to the hopper. 2. When the hopper is a plurality of hoppers corresponding to a plurality of latent image forming devices, and it is detected that there is no developer in at least one of the plurality of hoppers, the developer in each hopper is The developer conveying device according to claim 1, characterized in that the developer in each connecting pipe is returned to each hopper by reversing the transfer conveyor.