Abstract: A one-way clutch used in a wind power generation device integrally rotatably connects an input rotating body and an output rotating body to each other in a state in which a rotational speed of the input rotating body exceeds a rotational speed of the output rotating body, and breaks connection between the input rotating body and the output rotating body in a state in which the rotational speed of the input rotating body is lower than the rotational speed of the output rotating body. The input rotating body and the output rotating body are allowed to relatively move along an axial direction, and a maximum allowance of movement is set to be larger than variation of a distance along the axial direction between an input shaft and an output shaft caused by state change.

Abstract: A one-way clutch is arranged between an output shaft of a speed increaser and a drive shaft of a generator in a wind power generator. The one-way clutch includes an inner ring, an outer ring, a plurality of rollers arranged between an outer periphery of the inner ring and an inner periphery of the outer ring, a cage that retains the rollers at predetermined intervals in a circumferential direction, and a plurality of elastic members that is attached to the cage and that urges the corresponding rollers in one direction. The cage includes a pair of axially facing annular portions and a plurality of cage bar portions formed separately from the annular portions, both axial end portions of each of the cage bar portions being fitted to the respective annular portions.

Abstract: A sensor unit may include a ceramic member including a first face and a second face opposite to each other with a predetermined interval, a sensor part mounted on the first face, a plurality of metal pins fixed to the second face, a plurality of internal wirings passing through the ceramic member, each of the plurality of internal wirings connecting the sensor part with one of the plurality of metal pins, and a metal member formed on a circumferential end of the second face and joined with a housing by welding.

Abstract: A one-way clutch used in a wind turbine generator connects an input rotor with an output rotor so that the input rotor and the output rotor are rotatable together with each other when a main shaft rotates in a forward direction and rotation speed of the input rotor is higher than rotation speed of the output rotor, and disconnects the input rotor and the output rotor from each other when the rotation speed of the input rotor is lower than the rotation speed of the output rotor. Further, the wind turbine generator includes a second one-way clutch that permits transmission of force caused by the rotation of the main shaft, to the input rotor when the main shaft rotates in the forward direction, and restricts the rotation of the main shaft when the main shaft tries to rotate in a reverse direction.

Abstract: A wind power generator includes: an input rotor provided so as to be rotatable together with an output shaft of a speed increaser; an output rotor provided so as to be rotatable together with a drive shaft of a generator; and a one-way clutch arranged between the input and output rotors. The one-way clutch connects the input rotor to the output rotor such that the input rotor and the output rotor are rotatable together with each other when a rotation speed of the input rotor exceeds a rotation speed of the output rotor, and that disconnects the input rotor from the output rotor when the rotation speed of the input rotor falls below the rotation speed of the output rotor. The one-way clutch has a rotation speed limiter that disconnects the input rotor from the output rotor when the rotation speed of the output shaft exceeds a predetermined value.

Abstract: A power generating device includes an input rotor that is provided to an output shaft of speed up gears so as to be capable of rotating together with the output shaft, an output rotor that is provided to a drive shaft of a generator so as to be capable of rotating together with the drive shaft, and a one-way clutch that is disposed between the input rotor and the output rotor. The one-way clutch connects the input rotor with the output rotor so as to rotate together with the input rotor and the output rotor when the rotation speed of the input rotor exceeds the rotation speed of the output rotor, and the one-way clutch is configured to release the connection between the input rotor and the output rotor when the rotation speed of the input rotor falls below the rotation speed of the output rotor.

Abstract: A power generating device includes an input rotor that is provided to an output shaft of speed up gears so as to be capable of rotating together with the output shaft, an output rotor that is provided to a drive shaft of a generator so as to be capable of rotating together with the drive shaft, and a one-way clutch that is disposed between the input rotor and the output rotor. The one-way clutch connects the input rotor with the output rotor so as to rotate together with the input rotor and the output rotor when the rotation speed of the input rotor exceeds the rotation speed of the output rotor, and the one-way clutch is configured to release the connection between the input rotor and the output rotor when the rotation speed of the input rotor falls below the rotation speed of the output rotor.

Abstract: A rotation adjusting mechanism is provided in a power transmission path from a pulley to a rotation shaft and includes an elastic member and a clutch mechanism. The elastic member reduces a minute change in rotation generated in at least one of the pulley and the rotating shaft by its elastic deformation. The clutch mechanism is provided in an intermediate position of the power transmission path from the elastic member to the rotating shaft and configured to interrupt the power transmission from the pulley to the rotating shaft when a rotation speed of the pulley lowers below a rotation speed of the rotating shaft by a predetermined value or greater.

Abstract: A building is provided with a shutter, a stairway, and a handrail. The handrail has a connection member and a connection apparatus. The shutter opens and closes in a horizontal direction. A gap through which the shutter can pass is formed in the stairway. The handrail is provided at the stairway, and includes a handrail main body and a movable member. A gap through which the shutter can pass is formed in the handrail main body, and the movable member closes the gap in the handrail main body. The connection member connects one end portion of the movable member with the handrail main body such that the movable body is turnable relative to the handrail main body. The connection apparatus releasably connects another end portion of the movable member with the handle main body.

Abstract: A screw compressor includes a screw rotor having a plurality of helical grooves, a casing containing the screw rotor and a gate rotor. The casing includes a discharge port on an inner peripheral surface of the casing. The gate rotor has gates meshing with the helical grooves of the screw rotor to compress gas in compression chambers to discharge the gas from the discharge port after being compressed. The compression chambers are defined by the helical grooves, the casing, and the gates. The discharge port is divided into a first port and a second port when two adjacent helical grooves of the plurality of helical grooves is open to the discharge port as a result of rotation of the screw rotor, with one of the two adjacent helical grooves being open in the first port and the other of the two adjacent helical grooves being open in the second port.

Abstract: A rolling bearing cage includes: multiple rod members each of which is provided between adjacent two of multiple rolling elements that are arranged in a circumferential direction of a rolling bearing; and multiple coupling members each of which couples corresponding two of the rod members, which are adjacent to each other in the circumferential direction. Each of the coupling members is configured to be pivotable about an axis of a corresponding one of the rod members, which is connected to the coupling member, the axis extending in a longitudinal direction of the rod member, such that a relative angle between corresponding two of the coupling members, which are adjacent to each other in the circumferential direction, is adjustable.

Abstract: A cage used in a large-size rolling bearing is formed of a plurality of cage segments having a circular-arc shape and arranged in a circular pattern. Each cage segment includes rims opposed to each other and separated from each other at a predetermined interval, and a plurality of cage bars that extend from one of the rims to the other rim and that define pockets which accommodate the rollers and which are arranged in the circumferential direction. Multiple pairs of hook portions, between which the inner ring is sandwiched, are formed so as to project from the rims, and are arranged at predetermined intervals in the circumferential direction. Distal ends of the hook portions are engaged with annular grooves formed in end portions of the inner ring so as be rotatable relative to the inner ring.

Abstract: A rotation urging mechanism includes an outer member which includes an outer raceway surface on an inner periphery thereof and is rotatable about a first axis, an inner member which includes, on an outer periphery thereof, an inner raceway surface disposed on a radially inner side of the outer raceway surface and is rotatable about the first axis, and a ball disposed rollably between the outer raceway surface and the inner raceway surface. One of the outer and inner raceway surfaces is formed about a second axis which is inclined with respect to the first axis, and the other raceway surface is formed about a third axis which is inclined with respect to the second axis and is disposed so as to cross the one raceway surface. The ball is disposed at a portion of intersection between the outer and inner raceway surfaces.

Abstract: A screw compressor includes a screw rotor, a gate rotor and an injection mechanism. The screw rotor is provided with multiple helical grooves. The gate rotor is provided with multiple gates meshing with the helical grooves to form at least one compression chamber between at least one of the helical grooves and at least one of the gates. The compression chamber is configured and arranged such that refrigerant taken-in from a starting-end side of the helical groove is compressed and discharged from a dead-end side of the helical groove. The injection mechanism is configured and arranged to inject oil or refrigerant from a discharge hole of the injection mechanism into the compression chamber such that rotational torque is imparted in a direction in which the screw rotor is rotated at a time of compression.

Abstract: An engine that is lighter in weight includes a crankcase, a crankshaft, a body cylinder, a head cylinder, a piston, a piston ring and a cylinder fixing bolt. The piston ring is arranged on an outer peripheral surface of the piston. One end portion of the cylinder fixing bolt extends toward the head cylinder and an other end portion of the cylinder fixing bolt extends toward the crankcase. The cylinder fixing bolt connects the head cylinder, the body cylinder and the crankcase to one another. A lower section of the body cylinder is located within the crankcase. The piston ring abuts on the lower section when the piston is located at a bottom dead center.

Abstract: A bearing unit for a railway vehicle, which is disposed in an axle box disposed at each of opposite ends of an axle of a railway vehicle, includes an inner ring secured to the axle; an outer ring disposed outside the inner ring, and secured to the axle box; and rolling elements rollably disposed between the inner ring and the outer ring. A displacement-load sensor is disposed at an inner peripheral surface of the outer ring.

Abstract: A one-way clutch used in a wind turbine generator connects an input rotor with an output rotor so that the input rotor and the output rotor are rotatable together with each other when a main shaft rotates in a forward direction and rotation speed of the input rotor is higher than rotation speed of the output rotor, and disconnects the input rotor and the output rotor from each other when the rotation speed of the input rotor is lower than the rotation speed of the output rotor. Further, the wind turbine generator includes a second one-way clutch that permits transmission of force caused by the rotation of the main shaft, to the input rotor when the main shaft rotates in the forward direction, and restricts the rotation of the main shaft when the main shaft tries to rotate in a reverse direction.

Abstract: In a torque limiter, wedge-shaped spaces are formed between inner and outer rings so as to be arranged in the circumferential direction. In each wedge-shaped space, there are arranged a first roller and a second roller that transmit torque between the inner and outer rings by being brought into wedge-engagement when the inner and outer rings rotate relative to each other in one direction and in the other direction, respectively. Between the first and second rollers, there is arranged an urging device that urges the first and second rollers in such directions that the first and second rollers are brought into wedge-engagement. Each wedge-shaped space is formed such that when the torque becomes equal to or higher than a predetermined value, a first wedge angle of the first roller or a second wedge angle of the second roller becomes such an angle that wedge-engagement of the roller is cancelled.

Abstract: A pin-type cage includes a plurality of pins passed through respective through-holes formed along the central axes of a plurality of rolling elements that are arranged in the circumferential direction of a rolling bearing, and annular retaining members that connect the pins to each other at axially opposite ends of the pins. Each of the pins has a reservoir space that is formed in the pin and that is filled with lubricant, and supply holes used to supply the lubricant from the reservoir space to an outer periphery of the pin.

Abstract: A rolling bearing cage includes: multiple rod members each of which is provided between adjacent two of multiple rolling elements that are arranged in a circumferential direction of a rolling bearing; and multiple coupling members each of which couples corresponding two of the rod members, which are adjacent to each other in the circumferential direction. Each of the coupling members is configured to be pivotable about an axis of a corresponding one of the rod members, which is connected to the coupling member, the axis extending in a longitudinal direction of the rod member, such that a relative angle between corresponding two of the coupling members, which are adjacent to each other in the circumferential direction, is adjustable.