Abstract: A parallel link robot includes a base having an axis, a movable portion movable along the axis so as to pick a workpiece in a first working region and place the workpiece in a second working region, and first, second and third arms arranged around the axis to form first, second, and third angles between the first, second and third arms. Each of the arms connects the base and the movable part to move the movable part along the axis. The third angle is less than 120 degrees. The first angle and the second angle are equal. The first and third arms are positioned on a side of the first working region with respect to the axis. The second arm is positioned on a side of the second working region with respect to the axis.

Abstract: A parallel link robot includes a base, a movable part, link mechanisms, and actuators. The movable part is movable along a center axis. The first, second and third link mechanisms are provided around the center axis with angular intervals in a circumferential direction around the center axis to project outwardly along a radial direction with respect to the center axis. Each of the first, second and third link mechanisms connects the base and the movable part to move the movable part along the center axis. The angular intervals have an acute angular interval with an acute angle. The first, second and third actuators are provided at the base to be connected to the first, second and third link mechanisms respectively so as to drive the first, second and third link mechanisms respectively.

Abstract: A parallel link robot includes a base, a movable part, link mechanisms, and actuators. The movable part is movable along a center axis. The first, second and third link mechanisms are provided around the center axis with angular intervals in a circumferential direction around the center axis to project outwardly along a radial direction with respect to the center axis. Each of the first, second and third link mechanisms connects the base and the movable part to move the movable part along the center axis. The angular intervals have an acute angular interval with an acute angle. The first, second and third actuators are provided at the base to be connected to the first, second and third link mechanisms respectively so as to drive the first, second and third link mechanisms respectively.

Abstract: A grip force setting system includes a gripper, a detector, and circuitry. The gripper is to grip a gripping target object. The detector is to detect a deformation amount of the gripping target object in a state in which the gripper grips the gripping target object with a test grip force. The circuitry is to determine an operation grip force of the gripper based on a specific deformation characteristic value calculated based on a ratio of the deformation amount to the test grip force.

Abstract: The present invention is an industrial robot which has a feed screw that can be easily position in relation to the direct-acting guide. It has a power transmission device that can be removed from the supporting frame which the feed screw is left attached to the supporting frame, so that positioning of the feed screw is very easy. As a result if the simplicity in design machining is only required for the attaching surface for the direct-acting guide, the middle plate, the top plate, and the bottom plate, the cost of production is reduced.

Abstract: A stopper includes a frame (51) fixed to a mount base (1) of an industrial robot, a retaining shaft (52) which is fixed to the frame (51) in an upright position in relation to the plane of rotation of the turning base (2), a rod-shaped engagement lever (53) which is supported so as to be able to turn around the retaining shaft (52), a spring (57) for returning the engagement lever (53) to a position where it faces the center of the turning base (2), stoppers (59A, 59B) provided on both inner surfaces of the frame (51) which face the engagement lever (53), and an engagement dog (7) which is fixed to the turning base (2) and is capable of engaging the engagement lever (53). It is possible to provide a stopper for use with an industrial robot which permits setting of the operating angle of the turning base to a value of 360.degree. or more and which ensures a wide range of operation.

Abstract: A wrist mechanism of an industrial robot comprises: spline teeth (2A) formed in the outer circumference of the end portion of a bending drive shaft (2) which is provided inside of an arm (1); spline grooves (2B) which are formed in the inner circumference of a first bevel gar (21) and are engaged with the spline teeth (2A); spline teeth (3A) formed in the outer circumference of the end portion of a revolving drive shaft (3); a hollow cylindrical intermediate shaft (30) having one end portion in the inner circumference of which spline grooves (3B), which are engaged with the spline teeth (3A); are formed, and the other end portion to the outer circumference of which a second bevel gear (31) is secured; a bearing (301) through which the one end portion of the intermediate shaft (30) is supported on the first bevel gear (21); and bearings (22 and 24) through which the other end portion of the intermediate shaft (30) is supported on a stationary gear box (45).

Abstract: A joint driving structure for an industrial robot includes a first arm having a box-like end portion, a second arm having a box-like end portion, and a bearing between the end portion of the first arm and the end portion of the second arm. A driving motor is disposed at the end portion of the second arm, the driving motor having a rotational shaft, and a reduction gear mechanism coupled to the rotational shaft and operable to rotationally drive the second arm. The driving motor has a fixing portion, the driving motor further having an opposite-to-load side bracket fixed to the fixing portion of the driving motor. The reduction gear mechanism has a fixing portion fixed to the fixing portion of the drive motor, the reduction gear mechanism having an output portion fixed to the end portion of the first arm.

Abstract: In a precision operable robot arm comprising four levers pivotally connected with each other into a paralle arranged link form, when one ends of first and second levers aligned vertically, for example, are driven respectively by two motors such that the levers are swung around the alignment axis in a horizontal plane, for example, a work supporting device provided at an outwardly extending end of the fourth lever is also moved in a horizontal plane.A first pulley is fixedly secured to a position aligning with the driving shafts of the two motors, while second and third pulleys, which are integrally rotatable, are rotatably supported by a pivot pin coupling the second and fourth levers, and fourth pulley rotatably supported at the outer end of the fourth lever is fixed to the work supporting device.

Abstract: A monolithically integrated semiconductor laser device capable of producing a plurality of light beams different in wavelength from each other.

Abstract: An integrated laser array is disclosed in which a plurality of semiconductor lasers are integrated on a semiconductor multi-layer crystal that includes an active layer in which the band gap energy varies in one direction. By means of this arrangement a plurality of semiconductor lasers, which differ in their respective oscillating wavelengths over a relatively broad range, can be formed on a common substrate.

Abstract: A multichannel light switch including a cylindrical-shaped light-focusing transmission body having a length equal to an odd multiple of one quarter of the pitch of light beam undulation within the body and having a total reflection coating applied to one end face thereof, which is normal to the axis of the transmission body. A stationary optical fiber bundle is arranged opposite to the other end face of the transmission body and is in parallel to the axis thereof. For light-path switching between the optical fibers, the transmission body is adapted to be displaced in a radial direction or to be rotated in a plane normal to the axis thereof.

Abstract: There is disclosed a method of producing dielectric diffraction gratings. This method comprises (a) preparing a preform by forming one upon another layers of two or more glasses having different refractive indices at a given period, and (b) cutting the preform into flat pieces.

Abstract: A light branching and coupling device, having a light focusing transmission body, in which the refractive index distribution of the body gradually decreases from the center towards the periphery of the body in a cross-section thereof, said cross-section being perpendicular to the center axis of the body. The light focusing transmission body has a length substantially equal to a positive integral multiple of 1/4 pitch with a reflective surface positioned from an end face of the body at a predetermined distance substantially equal to an odd number multiple of 1/4 pitch. Light incident on one of two end faces perpendicular to the center axis of the body propagates undulatingly to the other end face at a predetermined pitch.