Abstract: A friction plate that is used in a friction engagement device configured to engage an input rotary member and an output rotary member with each other, the friction plate including a base plate having an annular plate shape; and a friction member provided on the base plate in a circumferential direction of the friction plate.

Abstract: A friction plate that is used in a friction engagement device configured to engage an input rotary member and an output rotary member with each other, the friction plate including a base plate having an annular plate shape; and a friction member provided on the base plate in a circumferential direction of the friction plate.

Abstract: A grinding wheel is manufactured such that (a) any one of particles for an abrasive grain layer and particles for a substrate layer are put into the press-mold die, and other particles are put onto the particles in the press-mold die, and then the substrate layer and the abrasive grain layer are integrally press-molded to form a non-baked grinding chip with an arcuate shape; (b) depressions are formed on the abrasive grain layer of the non-baked grinding chip; (c) the grinding chip on which the depressions are formed is baked; and (d) the plurality of baked-grinding chips are adhered to a core of the grinding wheel.

Abstract: A superabrasive grain setting apparatus for arranging superabrasive grains on a surface of a manufacturing mold used in manufacturing a grinding tool includes a grip and raising mechanism for gripping the mold in a horizontal state and for turning the mold to a vertical state. A six-axis control robot is composed of a base arm mechanism with three controlled axes and a wrist unit with three controlled axes attached to the base arm mechanism. A superabrasive grain supply device has a grain storage for storing the superabrasive grains and a grain separation mechanism for separating the superabrasive grains in the grain storage one by one to a suction position. A suction nozzle is detachably mounted on an endmost arm of the robot and provided with a bent nose portion for drawing a grain of superabrasive to a nozzle end thereof at the suction position.

Abstract: In a superabrasive grain setting method, a two-dimensionally developed coordinate preparation step is taken, wherein a non-cylindrical area of a mounting surface where a tangential line to the mounting surface in a plane including the axis of the manufacturing mold crosses with the axis of a manufacturing mold is developed into a circular-arc belt-like surface, and a plurality of mounting points are set on the circular-arc belt-like surface in a grid pattern in dependence on mounting positions for superabrasive grains. Then, a rectification step is taken, wherein the grid pattern of the mounting points is rectified in predetermined angular ranges so that the mounting points do not make consecutive point lines in the circumferential direction of the circular-arc belt-like surface. A mounting step is thereafter taken of mounting the superabrasive grains on the mounting surface of the manufacturing mold based on the grid pattern rectified at the rectification step.

Abstract: A grinding wheel is manufactured such that (a) any one of particles for an abrasive grain layer and particles for a substrate layer are put into the press-mold die, and other particles are put onto the particles in the press-mold die, and then the substrate layer and the abrasive grain layer are integrally press-molded to form a non-baked grinding chip with an arcuate shape; (b) depressions are formed on the abrasive grain layer of the non-baked grinding chip; (c) the grinding chip on which the depressions are formed is baked; and (d) the plurality of baked-grinding chips are adhered to a core of the grinding wheel.

Abstract: In an automatic transmission, a lip portion of an oil seal can be prevented from riding up reliably when an impeller hub is inserted into the oil seal so as to be attached thereto, even when the lip portion is provided with a tightening margin. The impeller hub is attached to the oil seal from the lip portion side of the oil seal , with an end portion thereof in which a notch is formed. The impeller hub has a first chamfer portion formed in a bottom portion outer peripheral edge portion of the notch as an inclined surface that decreases radially in an axial direction of the impeller hub toward the end portion of the impeller hub, and an axial distance of the first chamfer portion from the bottom portion outer peripheral edge portion increases from both end sides of a circumferential direction of the notch toward a circumferential direction central portion of the notch.

Abstract: A superabrasive grain setting apparatus is provided for arranging superabrasive grains on a surface of a manufacturing mold used in manufacturing a grinding tool. The apparatus comprises a grip and raising mechanism for gripping the mold in a horizontal state and for turning the mold to a vertical state; a six-axis control robot composed of a base arm mechanism with three controlled axes and a wrist unit with three controlled axes attached to the base arm mechanism; a superabrasive grain supply device having a grain storage for storing the superabrasive grains and a grain separation mechanism for separating the superabrasive grains in the grain storage one by one to a suction position; and a suction nozzle detachably mounted on an endmost arm of the robot and provided with a bent nose portion for drawing a grain of superabrasive to a nozzle end thereof at the suction position.

Abstract: In a superabrasive grain setting method, a two-dimensionally developed coordinate preparation step is taken, wherein a non-cylindrical area of a mounting surface where a tangential line to the mounting surface in a plane including the axis of the manufacturing mold crosses with the axis of a manufacturing mold is developed into a circular-arc belt-like surface, and a plurality of mounting points are set on the circular-arc belt-like surface in a grid pattern in dependence on mounting positions for superabrasive grains. Then, a rectification step is taken, wherein the grid pattern of the mounting points is rectified in predetermined angular ranges so that the mounting points do not make consecutive point lines in the circumferential direction of the circular-arc belt-like surface. A mounting step is thereafter taken of mounting the superabrasive grains on the mounting surface of the manufacturing mold based on the grid pattern rectified at the rectification step.

Abstract: A brake system that includes a friction plate composed of inner friction plates and outer friction plates that are arranged alternately in an axial direction; a cylinder portion that is open toward the friction plate in the axial direction; a piston member that slidably fits into an opening portion of the cylinder portion, thereby forming a working oil chamber, and that is pressed and driven away from the cylinder portion in the axial direction by oil pressure supplied to the working oil chamber, thereby pressing the friction plate; a return spring that biases the piston member toward the cylinder portion in the axial direction; and a drum member integrally provided with a drum portion that is in spline engagement with the friction plate, a pressure-receiving portion that is formed in a vertical direction to the axial direction and receives a reaction force of the return spring, and a fixed portion.

Abstract: In an automatic transmission, a lip portion of an oil seal can be prevented from riding up reliably when an impeller hub is inserted into the oil seal so as to be attached thereto, even when the lip portion is provided with a tightening margin. The impeller hub is attached to the oil seal from the lip portion side of the oil seal, with an end portion thereof in which a notch is formed. The impeller hub has a first chamfer portion formed in a bottom portion outer peripheral edge portion of the notch as an inclined surface that decreases radially in an axial direction of the impeller hub toward the end portion of the impeller hub, and an axial distance of the first chamfer portion from the bottom portion outer peripheral edge portion increases from both end sides of a circumferential direction of the notch toward a circumferential direction central portion of the notch.

Abstract: In a brake apparatus for a hoisting machine of an elevator, a field magnet and an armature of an electromagnetic actuator are mounted directly to brake arms supporting brake shoes. Therefore, members for transmitting the motion of an electromagnetic actuator into the motion of the brake arms can be omitted, whereby the number of parts and the overall size of the hoisting machine can be reduced, and maintenance operations can be performed easily at lower positions.

Abstract: A feed screw mechanism includes a nut having a female thread, and a feed screw shaft having a male thread screw-engaged with the female thread. A thrust pocket is formed along a flank of the female thread of the nut, and pressurized fluid is supplied thereto. A plurality of separated radial pockets are formed on the crest surface of the female thread of the nut, and pressurized fluid is supplied thereto. The thrust pocket is a continuous spiral groove formed along the flank of the female thread of the nut. This structure provides sufficient rigidity in both the radial and thrust directions while reducing the size of the feed screw mechanism.

Abstract: A linear motor elevator system comprising a sheave disposed in the upper portion of an elevator hoistway, a length of rope wound around the sheave, a movable member connected to said rope, a primary winding disposed only on a first side of said movable member and a secondary conductor extending within and along the hoistway in association with said primary winding to constitute a linear motor. The system may comprise a brake unit disposed on a second side of said movable member which is opposite to said first side and a guide rail disposed within said hoistway for being engaged by said brake unit.

Abstract: A brake shoe for an elevator safety device comprising a supporting body provided on a vertically moving body and having a front surface thereof facing a guide rail for being pressed toward the guide rail in the event of an emergency stop; the front surface having a plurality of bottomed holes provided therein; and a plurality of ceramic braking members disposed in the holes of the supporting body and each having a top portion thereof protruding from the front surface of the supporting body and each having an outer size smaller than a complementary size of each the hole. In the brake shoe, deformation, fusion, etc. on braking surfaces and breakage of the braking surfaces due to shocks during operation can be prevented, thereby achieving an improvement in safety and reliability. Further, an elevator speed can be increased and a device size can be reduced.

Abstract: The present invention provides a linear motor driven elevator apparatus which enables a decrease in the thrust variation at the passage of primary windings of a linear induction motor loaded on a car or a balance weight through joints of secondary conductors and which can prevent an unpleasant impression from being given to the passengers.In the elevator apparatus, each of the connections of the secondary conductor members of the linear induction motor serving as a drive source for vertically driving an elevator car has a structure in which each of the secondary conductor members is notched to about half of the thickness thereof, and the notch portions are superposed. The length of each of the notch portions is set to a value greater than the pole pitch of the primary windings of the linear induction motor, and the set heights of the joints are different from each other.

Abstract: A device for detecting a position of an edge of a cutting tool includes a reference plate positioned to form a slit between the edge of the cutting tool and the reference plate. The slit extends in a direction transverse to the longitudinal direction of the cutting tool. A laser light source is provided to irradiate a laser light to the slit. A detecting device detects a diffraction pattern created through diffraction of the laser light by the slit. A processing device is provided to determine the position of the edge of the cutting tool based on an output signal of the detecting device.

Abstract: An apparatus for machining a non-circular workpiece such as a piston wherein a tool is moved back and forth against the workpiece in accordance with profile data defining a desired final shape of the workpiece while the workpiece is rotated at a predetermined speed. The tool is moved by a composite movement of a linear motor driven in accordance with low frequency command values, and a piezoelectric actuator driven in accordance with high frequency command values. A numerical controller of the apparatus calculates the low frequency command values using a first Fourier series and the high frequency command values using a second Fourier series. Coefficients of the first and second Fourier series are determined using least square method in such a way that errors contained in the low and high frequency command values becomes within a predetermined limit.

Abstract: An apparatus for machining a non-circular workpiece, wherein the profile data of plural sections of the workpiece stored in the profile data storage means are transformed into the frequency functions of 1 to n degree which is a function of the rotary angular velocity of the workpiece. The calculation means finds the amplitudes and the phases of each degree of the frequency function of each of plural intermediate sections by means of the interpolation according to the position between selected two sections based on the frequency functions of the selected two sections so as to obtain high frequency functions and low frequency functions which are then converted to high frequency and low frequency profile data. The machining apparatus actuates a linear motor in accordance with the high frequency profile data and actuates a PZT actuator in accordance with the low frequency profile data.

Abstract: An apparatus for machining a non-circular workpiece wherein a tool is moved by a composite movement given by a linear motor and a piezoelectric actuator. The linear motor is driven by the numerical controller in accordance with the low frequency components of profile data defining a position change of the tool with respect to angular position change of the spindle, while the piezoelectric actuator is driven by the numerical controller in accordance with the high frequency components of the profile data. Further, a positioning error of the tool due to reaction force generated by the piezoelectric actuator is detected by the numerical controller to compensate the high frequency components for the detected positioning error.