Abstract: A method for manufacturing a flexible externally toothed gear includes: a first step (ST1) for producing a primary molded article by performing near-net-shape plastic working on a material comprising a nickel-free low-alloy steel having a silicon content of 1.45-1.5 wt %; a second step (ST2) for martempering the primary molded article; a third step (ST3) for producing a secondary molded article from the primary molded article; and a fourth step (ST4) for shot-peening the secondary molded article to change the surface portions of the tooth part and other parts to martensite. A flexible externally toothed gear can be obtained in which the surface hardness is kept within a prescribed range and the fatigue strength and abrasion resistance are high.

Abstract: A strain wave gearing (1) has a flexible externally toothed gear (3) with a boss (7). A boss-side fastening surface (16) formed on the boss is coaxially superposed with a member-side fastening surface (15) of an output member (11), and the boss (7) and the output member are fastened by fastening bolts (13). The bolt tension of the fastening bolts (13) causes the engaging protuberances (20) of the boss-side fastening surface (16) to dig into the member-side fastening surface (15) by a predetermined dig-in depth. A large frictional force is produced in the fastening portions between the flexible externally toothed gear (3) and the output member (11). It is thereby possible to transmit the necessary torque by the bolt tension alone without using pins or a friction sheet together with the fastening bolts.

Abstract: A power converter has one set of two semiconductor switches performing switching actions, each of which is formed of an FET and a free wheel diode connected in anti-parallel to the FET, and a smoothing capacitor, and convers power by complementary switching actions of the FETs in the semiconductor switches. The power converter is provided with a current sensor that detects a direction of a current flowing through the semiconductor switches and a gate generation portion that skips ON signals of PWM gate signals of the semiconductor switches when the direction of the current flowing through the semiconductor switches is negative.

Abstract: A wave generator for a wave gear device is provided with a pair of first rollers arranged in a position that is point-symmetric in relation to the center of a flexible externally toothed gear, a pair of second rollers, and a pair of third rollers. The first rollers are located on a long axis of the flexible externally toothed gear that is being flex into an ellipsoidal shape, and the second and third rollers are located in positions that are linearly symmetric in relation to the long axis between the long axis and a short axis. Support bearings of the first rollers are larger than those of the second and third rollers. The rolling fatigue life of a roller-type of the wave generator can be to be enhanced.

Abstract: An image forming method uses an ink set that includes applying a liquid composition onto a recording medium; further applying a ink composition onto the recording medium with an ink jet method to form an image; drying the image at a surface temperature of the image of 35° C. to 55° C. until a difference between a residual water content of a non-image portion on the recording medium and a residual water content of a image portion where an application amount of the ink composition is the maximum is 2 g/m2 to 4 g/m2; and irradiating the image with active energy rays: the ink set includes the ink composition containing at least a pigment, water, 3% by mass or less of polymer particles, and 5% by mass to 15% by mass of polymerizable compound having an acrylamide structure represented by the formula (1); and the liquid composition containing an aggregation component.

Abstract: In the present invention, while making it feel as though a prescribed image is moving, the burden of information recognition on a user is reduced. A measurement device is provided with a display device that displays images in a display region and a control unit that controls such display operation. At least a portion of the content of a first image displayed in a first position in the display region and the content of a second image displayed in a second position in the display region are shared. The control unit causes the display device to do the following: erase the first image displayed in the first position; after the first image is erased, to move a pattern image showing a prescribed pattern from the first position to the second position; and after the pattern image is moved to the second position, to display the second image in the second position.

Abstract: In a DC/DC converter, a first operation section calculates a first operation value, based on a difference voltage between an instruction value for a high-voltage-side voltage and a detected value of a high-voltage-side voltage, a second operation section calculates a second operation value, based on a difference voltage between a voltage instruction value for a charge-discharge capacitor and a voltage detected value of the charge-discharge capacitor, and a switching control section obtains a conduction ratio, based on the first operation value and the second operation value, and controls, based on the conduction ratio, switching operations of first to fourth semiconductor circuits, thereby controlling the high-voltage-side voltage, and the voltage of the charge-discharge capacitor.

Abstract: Disclosed is a DC-DC power conversion apparatus (10) including two or more switching units (SU1, SU2) each of which further includes two semiconductor switching elements (Sa, Sb), and wherein each of the semiconductor switching elements (S1a, S1b, S2a, S2b) of each of the switching units are all connected in series, and which also includes an energy transition capacitor (C1) for conducting charging/discharging, and an inductor (L). The DC-DC power conversion apparatus (10) is also provided with a control unit that makes the semiconductor elements execute operations in four types of switching modes, according to the ratio (V2/V0) of the input/output voltages of the power conversion apparatus and the direction of the power transmission, and that also makes the elements carry out a current-discontinuing operation wherein the inductor current will become zero during switching operation, upon low load.

Abstract: An optical connector cleaner comprising a supply reel, a take-up reel, a case, an operation lever, a take-up mechanism, and a holding member. The supply reel stores a cleaning cloth member having one end side wounded thereon. The take-up reel takes up the other end side of the cleaning cloth member. The case has a connector connection portion on which the cleaning cloth member is exposed. The operation lever that has an operation portion projecting from the case and is swingably supported. The take-up mechanism rotates the take-up reel in a take-up direction by a predetermined angle when the operation lever swings. The holding member holds an optical connector on the connector connection portion in a state in which a coupling face of the optical connector is pressed against the cleaning cloth member exposed to the connector connection portion.

Abstract: An externally toothed portion of a cup-shaped flexible externally toothed gear of a wave gear device is flexed into an ellipsoidal shape by a six-roller-type wave generator. A region of an inner peripheral surface of the ellipsoidally flexed externally toothed portion that is positioned on a major axis of the ellipsoidal shape is maximally inclined. First rollers of the wave generator are arranged so that the incline is identical to the incline of the region of the inner peripheral surface. A circular outer peripheral surface of the first rollers can be brought into contact with the region of the inner peripheral surface in an external-tooth tooth-trace direction without deflection; therefore, the angular transmission precision of the wave gear device can be improved.

Abstract: A power module includes at least two pairs of two power semiconductor units (PSUs), each of which includes a switch element and a rectifier element connected in anti-parallel. One of two PSUs in one pair and one of two PSUs in another pair are connected in series between primary and secondary positive terminals of a DC/DC voltage converter. Another of two PSUs in the one pair and another of two PSUs in the another pair are connected in series between the primary positive terminal and a secondary negative terminal in a direction reverse to a direction of the ones of two PSUs. Control is performed to suppress transient voltage fluctuations that occur in switching between the state where the polarity of a reactor current is only one of positive and negative and the state where the polarity remains one of positive and negative.

Abstract: The interior space of a cup-shaped flexible externally toothed gear of a cup-type wave gear device is divided into a front interior space and a rear interior space by a partition mechanism. A lubricant is filled in the front interior space at the side of a wave generator, to which lubrication is required. The volume of the front interior space is set so that a necessary amount of lubricant is filled. Since the lubricant is not necessary to fill in the entire interior space of the flexible externally toothed gear, the amount of lubricant to be filled can be reduced.

Abstract: An object of the present invention is to provide a DC/DC power conversion apparatus that can reduce the average power consumption over a wide range of DC voltage ratios. A control circuit (120) changes a switching frequency f at which IGBTs S1 to S4 perform ON/OFF operation, in accordance with a voltage ratio k (k=V2/V1) for DC voltage conversion, based on the following expressions, such that a magnitude ?I of a current ripple flowing in a reactor Lc is a predetermined constant value irrespective of the voltage ratio k.

Abstract: A power module includes at least two pairs of two power semiconductor units (PSUs), each of which includes a switch element and a rectifier element connected in anti-parallel. One of two PSUs in one pair and one of two PSUs in another pair are connected in series between primary and secondary positive terminals of a DC/DC voltage converter. Another of two PSUs in the one pair and another of two PSUs in the another pair are connected in series between the primary positive terminal and a secondary negative terminal in a direction reverse to a direction of the ones of two PSUs. Control is performed to suppress transient voltage fluctuations that occur in switching between the state where the polarity of a reactor current is only one of positive and negative and the state where the polarity remains one of positive and negative.

Abstract: An image forming method includes an ejecting step, a drying step after the ejecting step, and a particle-providing step after the drying step. The ejecting step includes ejecting aqueous ink onto a recording medium and forming an image. The drying step includes drying such that a difference between a water amount contained in the recording medium after the drying and a water amount that was contained in the recording medium before the ejecting is from 1.0 g/m2 to 4.0 g/m2. The particle-providing step includes supplying particles to the surface of a roller and, via the roller, providing the particles to a face of the recording medium at which the image has been formed.

Abstract: An inkjet recording method included a feeding step of feeding a recording medium, a jetting step of jetting aqueous ultraviolet-curable ink onto the recording medium, a humidity controlling step of controlling the amount of moisture on the surface on the recording side of the recording medium after the jetting step in such a way that a difference between the amounts of moisture on the surface on the recording side of the recording medium after the jetting step and during the feeding step becomes equal to or greater than 2 g/m2 and equal to or less than 5 g/m2, and a fixing step of curing and fixing, with a dose of ultraviolet light equal to or greater than 800 mJ/cm2, the aqueous ultraviolet-curable ink on the recording medium in which the difference of the amounts of moisture has been controlled.

Abstract: A power conversion apparatus for vehicle use having a small size and a light weight is obtained. The power conversion apparatus is provided with: a plurality of semiconductor modules in which semiconductor devices are molded with a resin, and each of which has a module body, an input terminal, and an output terminal; a heat sink of a rectangular parallelepiped shape which has cooling principal planes on opposite surfaces thereof, respectively, for cooling these semiconductor modules; and a plurality of control boards which control the driving of the semiconductor modules. Each of the semiconductor modules is arranged such that its module body has a principal plane in surface contact with one of the cooling principal planes of the heat sink, and each of the control boards is arranged in opposition to a surface of the module body at an opposed side of the principal plane thereof.

Abstract: Disclosed is a wave-type linear motion mechanism including a hydraulic pressure chamber for applying a retention force in the axial direction to a rigid screw member which moves in a linear fashion. Regulating valves are provided in the hydraulic pressure chamber, and these regulating valves open during the rotation of a wave generator so that no hydraulic pressure is exerted on the rigid screw member which moves in a linear fashion. During the rotation of the wave generator the regulating valves close to establish an airtight state in the hydraulic pressure chamber, and a hydraulic pressure is exerted as a retention force on the rigid screw member. Although restricted by the meshing strength between the rigid screw member and a flexible screw member and the buckling strength of the flexible screw member, the retention force of the wave-type linear motion mechanism is able to be increased.

Abstract: A matting liquid coating section supplies a matting liquid to an outer peripheral surface of a pressing roller. At the matting liquid coating section, a web, that is a non-woven fabric or the like and in which is seeped a matting liquid formed from a liquid (silicon oil or the like) in which matting agent particles are dispersed at a predetermined concentration, is trained around a first rod and a second rod, and is made to abut an outer peripheral surface of the pressing roller while running along the outer peripheral surface. The matting liquid is transferred once to the outer peripheral surface of the pressing roller, and the matting agent particles that adhere to the roller surface are again transferred onto a surface of a recording medium.

Abstract: The invention provides a reactor to be built in a power converter. In the reactor, an induction component composed of a coil being a winding of a conductor wire, a core in which interior a magnetic path is formed and an insulation bobbin positioning and engaging a wire wound part of the coil is housed in a case to be soaked with a mold resin. Inner bottom face of the case has a plurality of surfaces having not less than two different heights letting the outside bottom of the case a reference surface, and the lower end face of the core is in contact with any of the case inner bottom surfaces excluding the lowest inner bottom surface. As a result, the reactor is suitable for on-vehicle applications to achieve reduced article variation as well as a longer service life, a shorter operation time and decreased cost.