JP2004264878A5 - - Google Patents

Claims (15)

In an image forming apparatus for supplying toner stored in a toner storage container to a developing device,
An insertion / removal member formed in a tubular shape that is inserted into / removed from the bottom of the toner storage container;
Air supply means for supplying air into the toner storage container through the insertion / extraction member ;
A suction type powder pump for replenishing the toner stored in the toner storage container to the developing device;
The combined passage serving as a toner passage through which the toner discharged from the air passage and the toner container through which air supplied to the insertion and removal member to said toner accommodating container is provided,
The image forming apparatus, wherein the toner suction direction of the powder pump and the air supply direction are opposite in the dual-purpose passage . 2. The image forming apparatus according to claim 1, wherein an opening / closing means for opening and closing the path is provided in a toner supply path from an air supply section of the air supply means to the developing device inlet. Image forming apparatus . The image forming apparatus according to claim 1, wherein the powder pump also serves as an opening / closing unit that opens and closes a path provided in a toner supply path from an air supply unit of the air supply unit to an inlet of the developing device. An image forming apparatus . 4. The image forming apparatus according to claim 1, wherein when the air supply unit is operated, the toner supply path is closed by stopping the opening / closing unit or the powder pump. 5. An image forming apparatus . 5. The image forming apparatus according to claim 1, wherein the operation of the air supply unit is stopped when a toner supply path is opened by the operation of the opening / closing unit or the powder pump. 6. An image forming apparatus . 6. The image forming apparatus according to claim 1, wherein when the accumulated toner replenishment time due to the operation of the powder pump exceeds a predetermined time, the air supply means supplies the toner container. An image forming apparatus characterized in that air supply is performed. 7. The image forming apparatus according to claim 1, wherein an air supply unit and the toner replenishing unit are provided on the insertion / removal member, and the air supply unit is located above the toner replenishing unit. An image forming apparatus . 7. The image forming apparatus according to claim 1, wherein an air supply unit and the toner replenishment unit are provided on the insertion / removal member, and the toner replenishment unit is located above the air supply unit. An image forming apparatus . The image forming apparatus according to any one of claims 1 to 8, the image forming apparatus, wherein the diameter of the air supply portion from the air supply means is smaller than the diameter of the toner supply section. The image forming apparatus according to Claim 8, the image forming apparatus, characterized in that the air supply to the toner container from the air supply means is supplied from the lowest position of the toner supply path. The image forming apparatus according to any one of claims 1 to 7, the image forming apparatus characterized by air supply to the toner container from the air supply means is opened and closed by the air valve.   The image forming apparatus according to claim 1, comprising a plurality of toner storage containers, a toner replenishing device, and a developing device.   2. The image forming apparatus according to claim 1, wherein air is supplied to each toner storage container by a single air supply unit.   14. The image forming apparatus according to claim 13, wherein air is supplied to each toner storage container from the single air supply means by an air valve provided for each toner storage container.   15. The image forming apparatus according to claim 13, wherein control is performed so that the supply of air from the single air supply means is not supplied to the toner storage container in two or more at the same time.