Abstract: A parking assistance device that performs parking assistance when parking a vehicle in a parking area, includes: a speed calculation unit that calculates a first target vehicle speed for each control cycle indicating a cycle for calculating a target vehicle speed set as a target of a vehicle speed of the vehicle based on a target distance for the vehicle to move to a target position and the control cycle, the target position being included in the parking area; and a control unit that controls the vehicle such that the vehicle speed becomes the calculated first target vehicle speed for each control cycle.

Abstract: An inner ring includes: a pair of shoulder outer peripheral surfaces on first and second axial sides of a raceway surface of the inner ring in contact with balls; seal grooves disposed in first and second axial ends of the inner ring and defining labyrinth clearances with lips; and edges disposed on the first and second axial sides. Each of the edges is configured to cause grease flowing along an associated one of the shoulder outer peripheral surfaces to leave the shoulder outer peripheral surface in the direction of an extension thereof. Each of the lips includes a lip oblique surface functioning as a guide surface to guide the grease that has left the edge not to a radially inner region of the bearing but to a radially outer region of the bearing.

Abstract: An inner ring includes: a pair of shoulder outer peripheral surfaces on first and second axial sides of a raceway surface of the inner ring in contact with balls; seal grooves disposed in first and second axial ends of the inner ring and defining labyrinth clearances with lips; and edges disposed on the first and second axial sides. Each of the edges is configured to cause grease flowing along an associated one of the shoulder outer peripheral surfaces to leave the shoulder outer peripheral surface in the direction of an extension thereof. Each of the lips includes a lip oblique surface functioning as a guide surface to guide the grease that has left the edge not to a radially inner region of the bearing but to a radially outer region of the bearing.

Abstract: An inner ring includes: a pair of shoulder outer peripheral surfaces on first and second axial sides of a raceway surface of the inner ring in contact with balls; seal grooves disposed in first and second axial ends of the inner ring and defining labyrinth clearances with lips; and edges disposed on the first and second axial sides. Each of the edges is configured to cause grease flowing along an associated one of the shoulder outer peripheral surfaces to leave the shoulder outer peripheral surface in the direction of an extension thereof. Each of the lips includes a lip oblique surface functioning as a guide surface to guide the grease that has left the edge not to a radially inner region of the bearing but to a radially outer region of the bearing.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage that holds the balls. An annular groove for creep suppression is formed in a fitting surface that is fitted on a housing to which an outer ring is attached. The annular groove has a depth at which a groove bottom portion of the annular groove is precluded from coming into contact with the mating member when a static load rating is imposed on the annular groove in a radial direction.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements, and a cage. A first seal is provided on one side of the annular space between the inner ring and the outer ring in the axial direction and has a first lip portion that forms a first labyrinth clearance with the inner ring to prevent spill of the grease. A second seal is provided on the other side of the annular space in the axial direction and has a second lip portion that forms a second labyrinth clearance with the inner ring to prevent spill of the grease. The second lip portion is larger than the first lip portion such that the path length of the second labyrinth clearance is longer than the path length of the first labyrinth clearance.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and an annular cage. The cage has an annular portion provided on a first side in an axial direction with respect to the balls and a plurality of cage bars. Pockets that house the balls are each formed between the cage bars adjacent to each other in a circumferential direction. An axially-first-side side surface of the annular portion has a first surface that is inclined toward the first side in the axial direction as the first surface extends outward in a radial direction and a second surface provided outward of the first surface in the radial direction and positioned on the second side in the axial direction with respect to an extended virtual plane of the first surface.

Abstract: An inkjet recording method comprising: shooting to a recording medium an active-light-ray-curable inkjet ink including a photopolymerizable compound, a wax, a photopolymerization initiator, and a coloring material, and that undergoes reversible sol-gel phase transition relative to temperature; and curing the ink by irradiating an active light ray to the ink that has been shot to the recording medium, wherein the ink including a (meta) acrylate compound (B) having a molecular weight of 300-1500 and a ClogP value within the range 4.0 to 7.0, the wax content being 1.0-10 percent by mass of the total mass of the ink, and the temperature of the recording medium at active light ray irradiation being set such that the saturation solubility of the wax with respect to the ink constitutes 0.5 percent by mass or less. According to this image-forming method, blooming is suppressed.

Abstract: The present invention improves the even distribution of a powder to a pulverized coal pipe. A rotary classifier including: a rotary shaft rotatably supported around a rotational axis extending in a vertical direction; a frame body supported by the rotary shaft and including an opening on the outer periphery of the frame body; a plurality of powder outlets provided along the rotation direction and opening on the upper section of the frame body; a plurality of blades extending in the vertical direction at the opening on the outer periphery of the frame body and provided along the rotation direction; and an annular member that serves as a constricting section provided so as to narrow the interval from the blades to the rotary shaft.

Abstract: An inner ring includes: a pair of shoulder outer peripheral surfaces on first and second axial sides of a raceway surface of the inner ring in contact with balls; seal grooves disposed in first and second axial ends of the inner ring and defining labyrinth clearances with lips; and edges disposed on the first and second axial sides. Each of the edges is configured to cause grease flowing along an associated one of the shoulder outer peripheral surfaces to leave the shoulder outer peripheral surface in the direction of an extension thereof. Each of the lips includes a lip oblique surface functioning as a guide surface to guide the grease that has left the edge not to a radially inner region of the bearing but to a radially outer region of the bearing.

Abstract: A ball bearing includes an inner ring including an inner ring raceway surface on an outer periphery, an outer ring including an outer ring raceway surface on an inner periphery, a plurality of balls arranged between the inner ring raceway surface and the outer ring raceway surface, and a retainer including a plurality of pocket holes which respectively store the plurality of the balls, and arranged between the inner ring and the outer ring. Grease is sealed between the inner ring and the outer ring. The inner periphery of the outer ring is contacted with outer peripheral surface of the retainer so as to guide the retainer. The inner periphery of the outer ring includes a grease storage groove which communicates with the outer ring raceway surface, only on one side in an axial direction of the outer ring with respect to the outer ring raceway surface.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and an annular cage that holds the balls at intervals in a circumferential direction. The cage has an annular portion on a first side in an axial direction, and a plurality of cage bars. Pockets that hold the respective balls are each formed between a pair of the cage bars adjacent to each other in the circumferential direction on a second side in the axial direction with respect to the annular portion. Each of the pockets has a pocket surface shaped along a cylindrical surface centered around a center line that is a virtual line extending in a bearing radial direction. A linear protrusion that is elongate in a direction parallel to the center line is provided at an axially-first-side bottom portion of the pocket surface.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and an annular cage. The cage has an annular portion provided on a first side in an axial direction with respect to the balls and a plurality of cage bars. Pockets that house the balls are each formed between the cage bars adjacent to each other in a circumferential direction. An axially-first-side side surface of the annular portion has a first surface that is inclined toward the first side in the axial direction as the first surface extends outward in a radial direction and a second surface provided outward of the first surface in the radial direction and positioned on the second side in the axial direction with respect to an extended virtual plane of the first surface.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage that holds the balls. An annular groove for creep suppression is formed in a fitting surface that is fitted on a housing to which an outer ring is attached. The annular groove has a groove bottom portion and a pair of tapered surface portions extending from opposite sides of the groove bottom portion in an axial direction and defining a groove width that is larger toward the fitting surface. In a section including a bearing center line, each of the tapered surface portions has a linear sectional shape inclined to the fitting surface.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage that holds the balls. An annular groove for creep suppression is formed in a fitting surface that is fitted on a housing to which an outer ring is attached. The annular groove has a depth at which a groove bottom portion of the annular groove is precluded from coming into contact with the mating member when a static load rating is imposed on the annular groove in a radial direction.

Abstract: A rolling bearing includes an outer ring, an inner ring in which a shoulder diameter at one end of the rolling bearing in an axial direction is different from a shoulder diameter at the other end of the rolling bearing in the axial direction, a cage, a plurality of rolling elements, and shielding portions. A first clearance between an outer ring inner peripheral surface facing a large end of the inner ring having the larger shoulder diameter and a cage outer peripheral surface facing the outer ring inner peripheral surface is larger than a second clearance between an outer ring inner peripheral surface facing a small end of the inner ring having the smaller shoulder diameter and a cage outer peripheral surface facing the outer ring inner peripheral surface.

Abstract: The purpose of the present invention is to provide: an active ray-curable inkjet ink which has good dispersion stability during storage, good surface smoothness when ejected on a recording medium, and does not undergo the bleeding of a fatty acid onto the surface of the ink; and an image formation method using the active ray-curable inkjet ink. The purpose can be achieved by an active ray-curable inkjet ink which contains: a photopolymerizable compound; at least one wax in the total mass of 1 to 8 mass % relative to the whole mass of the ink; and a fatty acid in the total mass of 0.0001 to 0.10 mass % relative to the whole mass of the wax.

Abstract: A bearing device includes: an outer ring housing in a cylindrical shape which is provided in a casing and has a discharge hole in an axially central portion of the outer ring housing and a notch groove passing through an axial end surface of the outer ring housing in the radial direction; and a rolling bearing mounted on each of both axial sides of the outer ring housing and rotatably supporting a rotational shaft positioned radially inside of the outer ring housing.

Abstract: The purpose of the present invention is to provide an actinic ray curable inkjet ink which, in an inkjet printing method, is capable of having both high pinning characteristics and high ejection characteristics. In order to achieve the above purpose, this actinic ray curable inkjet ink includes an actinic ray curable compound, ketone wax, and ester wax, and reversibly goes through a sol-gel phase transition depending on the temperature.

Abstract: The purpose of the present invention is to provide: an active ray-curable inkjet ink which has good dispersion stability during storage, good surface smoothness when ejected on a recording medium, and does not undergo the bleeding of a fatty acid onto the surface of the ink; and an image formation method using the active ray-curable inkjet ink. The purpose can be achieved by an active ray-curable inkjet ink which contains: a photopolymerizable compound; at least one wax in the total mass of 1 to 8 mass % relative to the whole mass of the ink; and a fatty acid in the total mass of 0.0001 to 0.10 mass % relative to the whole mass of the wax.