| 摘要 |
An image forming apparatus containing image forming stations Y, M, C, K for respective colors arranged along a transfer belt, each image forming station including an image carrier, a charging means and a developing means disposed around the image carrier. The apparatus further having a housing body in which the image forming stations and the transfer belt are situated, a support frame for supporting a roller around which said transfer belt is laid with some tension, and an image density detecting means which is arranged to face the transfer belt, wherein the support frame is attached to the housing body which allows the support frame to be detachable relative to the housing body by a pivotal movement. The apparatus has a locking device for locking the support frame to the housing body, wherein the image density detecting device is disposed in proximity to the locking device, thereby preventing the deterioration of the detecting accuracy of the image density detecting device.
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