摘要:
An image forming apparatus of this invention is constructed such that a main base frame constituting the apparatus is formed with a pair of first positioning pins. An attachment member is formed with a pair of second positioning pins and positioning holes for fittingly receiving the first positioning pins therein to position the attachment member relative to the main base frame. A brake force supplier formed with mounting holes is attached to the attachment member while positioned relative thereto by fitting insertion of the second positioning pins in the mounting holes. When the attachment member is not used, another brake force supplier can be directly mounted on the main base frame and positioned relative thereto by fitting insertion of the first positioning pins in mounting holes of the brake force supplier.
摘要:
This invention relates to an image forming apparatus constructed such that an upper frame is openably mounted on a main base frame and a pivotal movement transmitter (gear) is rotatably mounted on the upper frame about an axis of a rotation of the upper frame, i.e., in association with the rotation of the upper frame. The gear has a cam portion. One end of a lever comes into contact with part of the cam portion of the gear, while the opposite end of the lever comes into contact with a coil spring. Further, a distance from the pivotal axis of the gear to the contact position of the lever with the cam portion decreases in accordance with a proceeding of the closing operation. Accordingly, as the lever (cam follower) follows the cam portion in accordance with the closing operation of the upper frame, a compression force to compress the coil spring increases. Thereby, a brake force applied to the upper frame on the way of closing also increases.
摘要:
This invention relates to an image forming apparatus for recording an image on recording paper. The apparatus has a main base frame internally provided with an imaging unit for recording an image on recording paper, an upper frame disposed on-the main base frame and pivotally movable about an axis of a pivot provided on one end of the upper frame corresponding to a rear side of the apparatus to open a front side of the apparatus, a document feeder unit disposed on the upper frame for feeding an original document set thereon toward the front side, a document discharge tray attached to the main base frame for receiving the document fed by the document feeder unit, and a recording paper discharge tray attached to the main base frame beneath the document discharge tray for receiving the recording paper carrying the recorded image. The document discharge tray and the recording paper discharge tray are integrally attached to the main base frame via a tray frame to form a one piece unit.
摘要:
A sheet transport path switching mechanism includes a movable guide to be moved rotatably about a support shaft parallel to the width direction of a transport path so as to selectively take either a main posture where the movable guide directs a sheet to the downstream side of a main transport path relative to a branch point, and a branch posture where the movable guide directs a sheet to a branch transport path. An engagement hook is provided in an apparatus body and supports a central region in the longitudinal direction of the movable guide to prevent the movable guide from being deformed due to interference with a sheet fed toward the branch transport path. The mechanism prevents deformation of the movable guide while facilitating reduction in material and production costs and adequately meeting requirements of waste treatment.
摘要:
There is provided a cleaning unit for removing residual toner present on the periphery of a photoconductive drum after toner image transfer, which includes: a main blade for scraping the toner from the surface of the photoconductive drum; and a cleaning roller disposed below the main blade and abutting against the periphery of the photoconductive drum. The inner space of the cleaning housing is divided into a cleaning chamber and a toner storage by a separator plate. A spacing between the lower end of the separator plate and the periphery of the cleaning roller is adjusted to preferably 1 mm to 2 mm, more preferably 1.3 mm to 1.5 mm. By thus adjusting the spacing, the toner is compressed when passing through the spacing and, hence, the toner transportation pressure is increased.
摘要:
An image-forming machine equipped with a transfer device of the type not using a transfer corona discharger is disclosed. A charge supply member is disposed opposite to an image forming member on whose surface a toner image is to be formed, and at a greater distance than the thickness of a transfer material from the image forming member. A voltage of a predetermined polarity is applied to the charge supply member. In a transfer zone, the surface of the transfer material is brought into contact with the surface of the image forming member, while the back of the transfer material is not contacted with the surface of the charge supply member.
摘要:
An image forming apparatus including a cleaning unit wherein a storage is defined in a cleaning housing to store therein toner to be discarded which is collected from the surface of a photoconductive drum after image transfer. The aforesaid storage has a capacity exceeding the maximum volume of toner to be used under normal conditions within the service life of the photoconductive drum. A cumulative number of produced copies is found from a signal from a paper discharge detecting sensor, so that with the number reaching a certain value, it is judged that the life of the photoconductive drum has expired. If a reed switch detects that the storage is full of waste toner before the expiry of the life of the photoconductive drum, it is judge to be abnormal, and a display unit is caused to indicate abnormality. Concurrent execution of the exchange of photoconductive drums and disposal of toner waste is assured, and if this is not accomplished, warning for trouble shooting is provided.
摘要:
The present invention discloses a structure of supporting an image bearing member in which the tip portions of support pins inwardly projecting from side plates of a housing, come in contact with the bottoms of support-pin introducing holes in the image bearing member, so that tension applied to a grid electrode disposed opposite to the image bearing member is received by rigidity obtained by the image bearing member and the support pins. Predetermined gaps are formed between the side plates and the flange portions of the image bearing member.
摘要:
A stern tube bearing system of contra-rotating propeller includes an inner shaft having a rear propeller and an outer shaft having a front propeller, both shafts being rotated in opposite directions. A shaft center portion of the inner shaft is made hollow, a plurality of oil supply holes are bores radially in the inner shaft so as to pass therethrough perpendicularly to the outer peripheral surface thereof, and a plurality of rows of these oil supply holes are arranged in the longitudinal direction of the inner shaft, whereby seizing of the bearing owing to offset contact at its rear end caused by the propeller being overhung can be prevented.
摘要:
An image display system makes a range of a region around a vehicle to be shown in a composite image as a subject image in a case where an auxiliary lighting system emits auxiliary light, smaller than that in a case where the auxiliary lighting system does not emit auxiliary light. As a result, an image display system can reduce the number of times when a user has to watch the subject image of an object in a region not illuminated by the auxiliary lighting system.