Abstract: An insulated bearing device is provided which includes a housing, an outer ring and rolling elements, and in which an insulating film for providing electrical insulation between the housing and the outer ring is disposed on the surface of the outer ring. The insulating film includes a straight portion extending along the outer periphery of the outer ring and having a constant outer diameter in the axial direction. The housing has, on the inner periphery of its housing hole, an inner peripheral cylindrical surface formed at a position intersecting with the axial centerlines of the rolling elements, and the straight portion is fitted to, and in contact with, the inner peripheral cylindrical surface. The contact range between the inner peripheral cylindrical surface and the straight portion has an axial length shorter than the entire axial length of the straight portion.

Abstract: To provide a rolling bearing having superior handling property and creep resistance. A rolling bearing 1 includes an inner ring 2 and an outer ring 3 that are raceway rings, and a plurality of balls 4 interposed between the inner ring and the outer ring. The outer ring 3 is fitted to a housing 10. The rolling bearing 1 includes a surface coating film 8 on an outer ring outer diametrical surface 3a that is a fitting surface with the housing 10. The surface coating film 8 contains: a binder containing two or more kinds of thermosetting resins having different average molecular weights; and a solid lubricant. The solid lubricant contains molybdenum disulfide, polytetrafluoroethylene resin, and graphite.

Abstract: A bearing device is provided which achieves both creep resistance and electrolytic corrosion resistance. At least one of the radially inner surface of the inner ring and the radially outer surface of the outer ring is covered with a coating layer. The coating layer is a coating layer composite composed of a plurality of layers. Of the plurality of layers, the surface layer is composed of an anti-creep film having lubricity, and at least one layer other than the surface layer is composed of an insulating film having insulating properties.

Abstract: A rocker bogie includes a first base which including a first wheel, a second wheel, and a third wheel each of which is configured to be in contact with a first flat surface, a second base including a fourth wheel which is configured to be in contact with the first flat surface, and a rotary shaft connecting the first base and the second base to each other such that the second base is rotatable with respect to the first base. The rotary shaft is parallel to a first straight line which connects a rotation center of the first wheel and a rotation center of the second wheel to each other and is disposed between a rotation center of the third wheel and the first straight line, and the fourth wheel is disposed at an opposite position to the third wheel across the first straight line.

Abstract: A rocker bogie includes a first base which including a first wheel, a second wheel, and a third wheel each of which is configured to be in contact with a first flat surface, a second base including a fourth wheel which is configured to be in contact with the first flat surface, and a rotary shaft connecting the first base and the second base to each other such that the second base is rotatable with respect to the first base. The rotary shaft is parallel to a first straight line which connects a rotation center of the first wheel and a rotation center of the second wheel to each other and is disposed between a rotation center of the third wheel and the first straight line, and the fourth wheel is disposed at an opposite position to the third wheel across the first straight line.

Abstract: An image forming apparatus having a development apparatus that includes: a developer storing part; a developer supply mechanism; and a surplus developer removing section; wherein the developer supply mechanism includes: a toner storing part; a carrier storing part; a developer conveying path and a conveying mechanism, both are arranged between the toner storing part and the developer storing part, and between the carrier storing part and the developer storing part; wherein the developer conveying path includes a toner ejection outlet through which a toner stored in the toner storing part is ejected and a carrier ejection outlet through which a carrier stored in the carrier storing part is ejected, and a supplying developer ejection outlet through which a supplying developer is ejected to the developer storing part; and wherein the conveying mechanism is adapted to convey the toner and the carrier while stirring them.

Abstract: An image forming apparatus having a development apparatus that includes: a developer storing part; a developer supply mechanism; and a surplus developer removing section; wherein the developer supply mechanism includes: a toner storing part; a carrier storing part; a developer conveying path and a conveying mechanism, both are arranged between the toner storing part and the developer storing part, and between the carrier storing part and the developer storing part; wherein the developer conveying path includes a toner ejection outlet through which a toner stored in the toner storing part is ejected and a carrier ejection outlet through which a carrier stored in the carrier storing part is ejected, and a supplying developer ejection outlet through which a supplying developer is ejected to the developer storing part; and wherein the conveying mechanism is adapted to convey the toner and the carrier while stirring them.

Abstract: An image forming apparatus includes a transfer member for transferring a toner image to a recording medium, a first fusing unit, and a second fusing unit located upstream of the first fusing unit for preheating the recording medium to a prescribed temperature before fusing by the first fusing unit. A heating member heats the recording medium and a detector detects the temperature of the recording medium. A controller controls the output of the heating member and the second fusing unit based on the temperature of the recording medium. In addition, the a recording medium conveyance controller will move the recording medium forward and backward in the recording medium conveyance direction when the temperature of the recording medium detected by the temperature detector exceeds or reaches a prescribed temperature at the end of printing.

Abstract: The recording medium is heated by a heating member and the resulting increase in the temperature thereof is detected by a detecting member. By controlling the output of the fusing member based on the result of the detection, the recording medium can be heated by the fusing member to a prescribed temperature regardless of the environment or the material comprising the recording medium. Therefore, good fusing performance of the fusing member can be maintained at all times in a stable fashion with regard to various types of recording media.

Abstract: A developing device using dual-component developer which is detachably attachable a first cartridge accommodating toner or a second cartridge accommodating starter incorporating at least carrier. The developing device has a developing section which develops an electrostatic latent image on a photosensitive member, a coupling which detachably holds a first cartridge or a second cartridge and having a first aperture corresponding to a replenishment aperture of the first cartridge as well as a second aperture corresponding to a replenishment aperture of the second cartridge, toner buffer which supplies toner from the first cartridge to the developing section by predetermined amounts when the first cartridge is attached to the coupling, and a replenishment path provided between the developing section and the coupling for supplying starter from the second cartridge directly to the developing section when the second cartridge is attached to the coupling.

Abstract: A process cartridge removably mounted with respect to the body of an image forming apparatus, which includes an image bearing member, a charging device for uniformly charging the surface of said image bearing member, with the charging device including a discharge electrode and a control electrode, a device for regulating the potential of the control electrode to a predetermined value, and an operation change-over device for rendering the regulating device operative or inoperative.