Abstract: A display device includes a pair of display units each including displays 1R and 1L and ocular optical systems 2R and 2L. A first driving unit can change an optical positional relationship between the displays 1R and 1L and the ocular optical systems 2R and 2L. A second driving unit can change an interval between the pair of display units. An interpupillary distance adjustment unit adjusts the interval between the display units by the second driving unit in accordance with a detection result obtained by the interpupillary distance detector. After interpupillary distance adjustment is performed, a diopter adjustment unit performs diopter adjustment related to the display unit by the first driving unit.

Abstract: A detection system includes a detection target device and a detection device. The detection target device includes a first rotating member rotatable about a first axis, and repeats an operation corresponding to a rotation angle of the first rotating member every time the first rotating member makes a 1/N rotation, N being an integer of 2 or greater. The detection device includes a second rotating member rotatable about a second axis due to a driving force transmitted from the first rotating member, and an output value of the detection device repeats monotonic increase or monotonic decrease in accordance with a rotation angle of the second rotating member every time the second rotating member makes 1 rotation. Every time the first rotating member makes a 1/N rotation, the second rotating member makes 1 rotation.

Abstract: A detection system includes a detection target device and a detection device. The detection target device includes a first rotating member rotatable about a first axis, and repeats an operation corresponding to a rotation angle of the first rotating member every time the first rotating member makes a 1/N rotation, N being an integer of 2 or greater. The detection device includes a second rotating member rotatable about a second axis due to a driving force transmitted from the first rotating member. Every time the first rotating member makes a 1/N rotation, the second rotating member makes 1 rotation. Within a whole range of the output value of the detection device from a minimum value to a maximum value, a predetermined range where detection accuracy is guaranteed is assigned to a region corresponding to a 1/N rotation of the first rotating member.

Abstract: According to an ink replacement method in an ink-jet recording apparatus that includes a recording head having an ink ejection face in which a plurality of nozzles for ejecting ink onto a recording medium are arranged, a sub-tank that temporarily stores the ink fed from an ink container, and an ink flow passage through which the ink circulates from the sub-tank via the recording head to the sub-tank, gas is inserted between first ink present in the ink flow passage and second ink newly supplied to the recording head via the ink flow passage to form a gas-liquid interface between the first and second ink and gas, and then the first ink is replaced with the second ink.

Abstract: An inkjet includes a head unit, a blade, and a cleaning liquid supply member. The head unit is provided with a nozzle surface, and supported to be lifted and lowered. The blade is in contact with the nozzle surface and moves in a predetermined moving direction to wipe off the nozzle surface. The cleaning liquid supply member stores a cleaning liquid, and supplies the cleaning liquid between a moving start position of the blade and the nozzle surface. The cleaning liquid supply member has a plurality of supply ports provided between the moving start position of the blade and the nozzle surface. When a direction crossing to the moving direction is defined as a width direction, a width of the blade is set to “a”, and a width of a region where the supply ports are formed is set to “b”, then the next formula is established, a?b.

Abstract: A steel material according to the present disclosure consists of, by mass %, C: 0.30 to 0.50%, Si: 0.01 to 0.30%, Mn: 0.10 to 1.50%, P: 0.030% or less, S: 0.030% or less, Cr: 0.01 to 0.80%, Mo: 0.70 to less than 1.50%, V: 0.01 to 0.50%, Al: 0.005 to 0.100%, and N: 0.0010 to 0.0300%, with the balance being Fe and impurities. The area fraction of hard structure is 90% or more and the Vickers hardness is 220 to 400 HV. The number density of cementite particles in the hard structure is 4.0 pieces/?m2 or more. The number ratio of cementite particles having an area of 0.0005 to 0.0100 ?m2 among a plurality of the cementite particles in the hard structure is 50.0% or more. The sample standard deviation of the areas of a plurality of the cementite particles in the hard structure is 0.070 ?m2 or less.

Abstract: An ink jet recording apparatus includes a recording head, a blade, and a cleaning liquid dispensing unit. The recording head includes a nozzle surface including a plurality of nozzles each having an ink outlet oriented downward, and is supported so as to move in an up-down direction. The blade wipes the nozzle surface, by moving in a predetermined moving direction in contact with the nozzle surface. The cleaning liquid dispensing unit stores therein cleaning liquid supplied from a cleaning liquid supply source, and supplies the cleaning liquid between a travel start position of the blade and the nozzle surface. The cleaning liquid dispensing unit includes a receptacle in which the cleaning liquid that has been supplied is stored, the receptacle having a top face open upward.

Abstract: An inkjet recording apparatus includes a recording head, a blade, and a cleaning liquid supply member. The head unit is provided with a nozzle surface. The cleaning liquid supply member includes a supply port, a sheet member, and a holder. When the cleaning liquid supply member is moved to a supply position and then the recording head is lowered, a tip end of the sheet member comes into contact with the nozzle surface, and then the cleaning liquid supply member is turned from an inclined posture to a supply posture while the tip end of the sheet member is moved along the nozzle surface forward in the moving direction, and the sheet member is disposed between the supply port and the nozzle surface.

Abstract: An inkjet recording apparatus includes a head unit and a gap adjustment device. The head unit includes one or more inkjet heads. The gap adjustment device adjusts a gap of the head unit with respect to a conveyance path. The gap adjustment device includes a shaft, a rotating body, a stepped part, a gap adjustment member, a spherical body. The rotating member has an intersection surface intersecting the shaft and is rotatable around the shaft. The stepped part is provided on the intersection surface and its height is changed in a stepped pattern in a circumferential direction. The gap adjustment member has a rear side surface facing the intersection surface and a front side surface being in contact with the head unit, and is movable in a direction of the shaft. The spherical body is held between the rear side surface and the intersection surface.

Abstract: An image forming system includes: a transfer unit that transfers an image formed of a thermally fusible image-forming material to a medium that moves; a thermal fixing unit disposed downstream of the transfer unit in a moving direction in which the medium moves, the thermal fixing unit fixing the image on the medium by at least heating the image; and a cooling unit that cools a spatial region between the transfer unit and the thermal fixing unit. The cooling unit has suction openings through which outside air is taken into the spatial region between the transfer unit and the thermal fixing unit from both sides of the spatial region in a crossing direction crossing the moving direction of the medium. The cooling unit includes an exhaust unit that draws in and discharges air in the spatial region such that an amount of air drawn in a central region in the crossing direction of the medium is greater than an amount of air drawn in regions adjacent to ends in the crossing direction of the medium.

Abstract: An image forming apparatus includes a housing, a developing device disposed in the housing and including a container that contains a developer, a transport member that rotates to transport the developer in the container, and bearing units that bear a shaft of the transport member, a ventilator disposed in the housing to pass by at least a rear end of the developing device in a longitudinal direction of the developing device and having a channel space through which air outside the housing flows in and is then discharged out of the housing, and a thermal conductor that is provided to the ventilator and transfers heat of the bearing unit at least at the rear end of the developing device to at least the ventilator by being in contact with a part of the bearing unit.

Abstract: An inkjet recording apparatus includes a first adjustment portion and a second adjustment portion. The first adjustment portion adjusts a position of an inkjet head in a predetermined direction intersecting with an up-down direction. The second adjustment portion retains the first adjustment portion in a liftable manner and adjusts a position of the first adjustment portion in the up-down direction. The second adjustment portion includes a tilted member which has an upper surface tilted with respect to the predetermined direction and is slidable in the predetermined direction. The first adjustment portion includes a contact portion which protrudes downwardly and comes into contact with the upper surface of the tilted member.

Abstract: An image forming apparatus includes an apparatus main body that includes an image formation unit forming an image on a recording material, a fixation unit that includes a fixing unit fixing the image formed by the image formation unit onto the recording material and that is attachable to and detachable from the apparatus main body, a first duct that is attached to the fixation unit to face the fixing unit and through which a gas that cools the fixing unit flows, and a second duct that is attached to the apparatus main body to be adjacent to the first duct and through which a gas that cools the fixing unit flows.

Abstract: A powder conveying device includes a first conveying component through which gas containing powder is to be conveyed; a second conveying component to which a downstream end of the first conveying component is connected and through which the gas received from the first conveying component is to be conveyed, the second conveying component extending in a second gas conveying direction that intersects a first gas conveying direction defined by the first conveying component; a third conveying component extending from the second conveying component and through which the gas received from the second conveying component is to be conveyed, the third conveying component extending in a third gas conveying direction that intersects the second gas conveying direction; a fourth conveying component to which a downstream end of the third conveying component is connected and through which the gas received from the third conveying component is to be conveyed, the fourth conveying component extending in a fourth gas conveying d

Abstract: A developing device includes: a container that contains developer; a developer holder that rotates with the developer being held on a surface thereof to transport the developer to a developing region; and a cooling unit. An introduction port is provided at a position corresponding to the developing region, the introduction port allowing suction of a floating substance generated in the developing region in a transverse direction of the container. The cooling unit is connected to the introduction port to allow passage of gas containing the floating substance in a longitudinal direction of the container, and cools the container with the gas. An intake port is connected to an end of the cooling unit in the longitudinal direction, the intake port allowing introduction of gas.

Abstract: An image forming apparatus, for forming an image with a fixing unit that fixes a toner image to a recording material and with a first transport path, includes: a first guide unit that guides one side of a recording material discharged from the fixing unit and transported through the first transport path; a second guide unit that guides the other side of the recording material transported thorough the first transport path; a blowing part through which gas is sent to the one side of the recording material transported through the first transport path; and a gas guiding part that faces the second guide unit with the first transport path interposed between the gas guiding part and the second guide unit and that guides, in a direction away from the first transport path, gas that is sent from the blowing part and whose traveling direction is changed by a recording material.

Abstract: An image forming apparatus includes: an image forming section that forms, with a developer containing toner, a toner image on a recording material; a fixing unit that fixes a toner image formed at the image forming section to a recording material; a recovery unit that recovers waste powder containing toner discharged from the image forming section; and a gas circulation unit in which gas for cooling the vicinity of the image forming section or the vicinity of the fixing unit circulates and that has a portion disposed between the recovery unit and the fixing unit.

Abstract: An image forming apparatus includes an apparatus main body that includes an image formation unit forming an image on a recording material, a fixation unit that includes a fixing unit fixing the image formed by the image formation unit onto the recording material and that is attachable to and detachable from the apparatus main body, a first duct that is attached to the fixation unit to face the fixing unit and through which a gas that cools the fixing unit flows, and a second duct that is attached to the apparatus main body to be adjacent to the first duct and through which a gas that cools the fixing unit flows.

Abstract: According to an ink replacement method in an ink-jet recording apparatus that includes a recording head having an ink ejection face in which a plurality of nozzles for ejecting ink onto a recording medium are arranged, a sub-tank that temporarily stores the ink fed from an ink container, and an ink flow passage through which the ink circulates from the sub-tank via the recording head to the sub-tank, gas is inserted between first ink present in the ink flow passage and second ink newly supplied to the recording head via the ink flow passage to form a gas-liquid interface between the first and second ink and gas, and then the first ink is replaced with the second ink.

Abstract: An image forming apparatus, for forming an image with a fixing unit that fixes a toner image to a recording material and with a first transport path, includes: a first guide unit that guides one side of a recording material discharged from the fixing unit and transported through the first transport path; a second guide unit that guides the other side of the recording material transported thorough the first transport path; a blowing part through which gas is sent to the one side of the recording material transported through the first transport path; and a gas guiding part that faces the second guide unit with the first transport path interposed between the gas guiding part and the second guide unit and that guides, in a direction away from the first transport path, gas that is sent from the blowing part and whose traveling direction is changed by a recording material.