JP2010256701A5

JP2010256701A5 -

Info

Publication number: JP2010256701A5
Application number: JP2009107916A
Authority: JP
Filing date: 2009-04-27
Publication date: 2012-05-31
Anticipated expiration: 2029-04-27

Description

本発明に係る現像装置は、現像剤を収納可能な第一室と、前記第一室と連絡することで現像剤を循環させる循環路を形成し、現像剤を収納可能な第二室と、前記第一室及び前記第二室内の現像剤を搬送する搬送手段と、前記第二室において、現像剤の搬送方向下流側の前記循環路外に設けられ、現像剤を排出するための排出口と、前記循環路と前記排出口の間の現像剤搬送路中に回転可能に設けられた回転軸と、前記回転軸に設けられ、前記排出口に向かう現像剤を前記循環路に向けて搬送する螺旋状の搬送部と、前記搬送部の搬送方向上流側で、前記回転軸の周方向に沿って前記回転軸の径方向に突出し、前記回転軸の周方向に関して無端状に形成された突起部と、を有することを特徴とする。 The developing device according to the present invention includes a first chamber capable of storing a developer, a circulation path for circulating the developer by communicating with the first chamber, a second chamber capable of storing the developer, Conveying means for conveying the developer in the first chamber and the second chamber, and a discharge port for discharging the developer provided in the second chamber outside the circulation path on the downstream side in the developer conveying direction. A rotation shaft rotatably provided in the developer conveyance path between the circulation path and the discharge port, and a developer that is provided on the rotation shaft and that is directed toward the discharge port is conveyed toward the circulation path. And a protrusion that protrudes in the radial direction of the rotary shaft along the circumferential direction of the rotary shaft and endlessly with respect to the circumferential direction of the rotary shaft, on the upstream side of the transfer unit in the transfer direction And a portion.

本発明によれば、異なる搬送速度にて搬送れる現像剤の排出量を搬送部の搬送方向上流部に設けられ、回転軸の周方向に沿って該回転軸の径方向に突出し、該回転軸の周方向に関して無端状に形成された突起部により適切に制御することができる。 According to the present invention, the developer discharge amount conveyed at different conveyance speeds is provided upstream in the conveyance direction of the conveyance unit , and protrudes in the radial direction of the rotation axis along the circumferential direction of the rotation axis. It can control appropriately by the projection part formed in endless shape with respect to the circumferential direction .

Claims

A first chamber in which developer can be stored;
Forming a circulation path for circulating the developer by communicating with the first chamber, and a second chamber capable of storing the developer;
Conveying means for conveying the developer in the first chamber and the second chamber;
In the second chamber, provided outside the circulation path on the downstream side in the developer transport direction, and a discharge port for discharging the developer,
A rotating shaft rotatably provided in the developer conveying path between the circulation path and the discharge port;
A spiral conveyance unit that is provided on the rotation shaft and conveys the developer toward the discharge port toward the circulation path;
A protruding portion that protrudes in a radial direction of the rotating shaft along a circumferential direction of the rotating shaft and endlessly formed in the circumferential direction of the rotating shaft, on the upstream side of the conveying portion in the conveying direction. A developing device.