Abstract: A torsional vibration reduction device provided inside a torque converter includes rolling elements, a plate, and a cover. The plate includes rolling chambers housing the rolling elements. The cover encloses and shields the rolling elements and the plate from a working fluid surrounding the torsional vibration reduction device inside the torque converter. The cover includes first and second covers that are joined together with the plate held between the first and second covers. The first and second covers contact the plate in an axial direction of the torque converter at locations that are, with respect to an axis of the torque converter, on an inner peripheral side and on an outer peripheral side of the rolling chambers. Surfaces of the first and second covers are joined to the plate at least at part of the locations where the first and second covers contact the plate.

Abstract: A welding laser beam (L1) is radiated along welding loci (C11, C12) set in workpieces (W1, W2), or an inspection laser beam (L5) is radiated along scanning loci (C51, C52) set in a molten pool (Y1) of the workpieces (W1, W2) that are molten by radiation of the welding laser beam (L1), a returned light beam (L2) including reflection light from the molten pool (Y1) of the workpieces, vapor light caused due to melting and evaporation of the workpieces, and thermal radiation light emitted from the molten pool (Y1) of the workpieces is received, and a welding state of a welded portion of the workpieces is inspected based on an intensity change of the returned light beam (L2) thus received.

Abstract: The first embodiment of the invention is a spot welding method using a welding gun including a pair of electrodes holding and welding a welding point of a workpiece. The method including: transmitting an ultrasonic from one of the electrode pair to the workpiece with the electrode pair holding the workpiece; receiving the ultrasonic at the other electrode passed through the electrode pair and the workpiece; and detecting a holding state of the workpiece on the basis of an amplitude of the received ultrasonic. According to the embodiments of the invention, the welding gun can hold the workpiece at the proper position and with the correct angle, thereby reducing the welding flaws.

Abstract: A polar functional group is added onto a surface of a metallic member (1). A resin member (2) contains an adhesive functional group. The adhesive functional group and the polar functional group attract each other. A method for joining the metallic member (1) and the resin member (2) to each other includes a heating a junction between the metallic member (1) and the resin member (2) while pressing the metallic member (1) and the resin member (2) against each other with first load, maintaining temperature of the junction higher than melting temperature of a resin that structures the resin member (2) while pressing the metallic member (1) and the resin member (2) with each other with second load smaller than the first load, and cooling the junction to temperature lower than the melting temperature while pressing the metallic member and the resin member against each other with third load larger than the second load.

Abstract: A metal paste for joining includes aggregates of metal nanoparticles and a solvent, and an average particle size of the aggregates is 1 ?m or more.

Abstract: A polarity inversion control section (9) supplies a polarity designation signal, which designates a polarity of a data signal, to a data line drive circuit (5) while reversing a polarity of the polarity designation signal every frame. Even in a case where a pause driving control section (8) receives a designation signal that designates a sum of the number of frames constituting a scanning period and the number of frames constituting a pause period to be an even number, the pause driving control section (8) maintains the sum of the number of frames constituting a scanning period and the number of frames constituting a pause period to be an odd number.

Abstract: A welding laser beam (L1) is radiated along welding loci (C11, C12) set in workpieces (W1, W2), or an inspection laser beam (L5) is radiated along scanning loci (C51, C52) set in a molten pool (Y1) of the workpieces (W1, W2) that are molten by radiation of the welding laser beam (L1), a returned light beam (L2) including reflection light from the molten pool (Y1) of the workpieces, vapor light caused due to melting and evaporation of the workpieces, and thermal radiation light emitted from the molten pool (Y1) of the workpieces is received, and a welding state of a welded portion of the workpieces is inspected based on an intensity change of the returned light beam (L2) thus received.

Abstract: A power-operated air blowing work apparatus comprises: a volute casing including a centrifugal fan installed therein and having a front wall formed with an air intake aperture for sucking air from an atmosphere into the volute casing by the centrifugal fan; an engine mounted to the volute casing in a rear side of the volute casing and connected to the centrifugal fan for rotating the centrifugal fan; an engine casing covering the engine from behind the engine in the rear side of the volute casing, and an air suction passage communicating from inside the engine casing toward inside the front wall of the volute casing for drawing air in the engine casing toward inside the front wall of the volute casing.

Abstract: A nozzle pipe is to be coupled to a distal open end of an air blow-off tube of a blower apparatus for regulating the profile of an airflow blown out from the blow-off tube. The nozzle pipe comprises an outer tubular member and an inner tubular member coaxially disposed within the outer tubular member. The inner tubular member has a circumferential wall formed with apertures allowing air passage therethrough. The outer tubular member and the inner tubular member provides a first space therebetween to form a first air passage, while the inner tubular member provides a second space therein to form a second air passage. A plurality of rectifier fins are disposed inward from the outer tubular member, standing radially and extending longitudinally, and spaced apart circumferentially from each other. The fins extend inclined at an angle with reference to the longitudinal central axis of the tubular members.

Abstract: A work apparatus is comprised of a blower unit including a drive motor, a volute casing, a fan rotatably supported within the volute casing and driven by the drive motor, and an airflow duct connected to the volute casing, thereby blowing out or sucking in air through the airflow duct; and of an airflow tube coupled to the airflow duct of the blower unit and having an open distal end for blowing out or sucking in air through the airflow tube. The airflow tube is provided with a grip handle adapted for being held and operated by the operator. Within the airflow tube is arranged an electrically conductive wire at least between the grip handle and the open distal end, beyond which is provided an electrically grounding wire connected to the electrically conductive wire and drooping therefrom to be touchable to earth.

Abstract: In a display device (1) according to an aspect of the present invention, at least part of an N-M first sub pixel(s) is/are driven according to one of first and second gamma curve groups being selected depending on a position(s) where said at least part of the N-M first sub pixel(s) is/are located, and at least part of a second sub pixel(s) is/are driven according to one of the first and second gamma curve groups being selected depending on a position(s) where said at least part of the second sub pixel(s) is/are located.

Abstract: A sum of the number of frames constituting a scanning period and the number of frames constituting a pause period is an even number. A polarity of a POL signal in each frame in each of the scanning period and the pause period is reversed every frame. Further, the polarity of the POL signal is reversed at a timing when switching from the scanning period to the pause period is carried out, and is maintained at a timing when switching from the pause period to the scanning period is carried out. Alternatively, the polarity of the POL signal is maintained at a timing when switching from the scanning period to the pause period is carried out, and is reversed at a timing when switching from the pause period to the scanning period is carried out.

Abstract: A liquid crystal display device (1) according to one embodiment of the present invention includes a timing controller (4) which, (i) in a first display mode, in which a number of tones that each pixel is capable of displaying is smaller than a predetermined number, controls a scanning signal and a data signal by an interlace driving method, by which a single frame includes a plurality of fields, and (ii) in a second display mode, in which the number of tones that each pixel is capable of displaying is equal to or greater than the predetermined number, controls the scanning signal and the data signal by a progressive driving method.

Abstract: A polarity of a POL outputted from a polarity inversion control section (9) is always identical between a scanning period and a pause period immediately subsequent to the scanning period, and is reversed every time switching from a pause period to a scanning period is carried out. This makes it possible to both carry out pause driving and prevent image sticking on a display panel.

Abstract: A joining method for joining a resin member and a metal member by heating is provided. Joining of the resin member and metal member is performed by heating a joining interface of the resin member and metal member to a temperature in a range of equal to or higher than a decomposition temperature of the resin member and lower than a temperature at which gas bubbles are generated in the resin member and by cooling a surface of the resin member on the opposite side from a joining surface thereof with the metal member to a temperature that is lower than the melting point of the resin member.

Abstract: Disclosed is a technique on laser welding capable of achieving a desired penetration depth without an oxide film remaining in a deep portion of a molten pool. In a welding device (1) that emits a laser beam focusing on a working point (P), the laser beam has a profile similar to a profile of a superimposed laser beam at the working point. The superimposed laser beam is formed by superimposing a first laser beam and a second laser beam having a beam diameter smaller than that of the first laser beam. in the profile of the laser beam, a portion corresponding to the first laser beam has a power density allowing thermal-conduction type welding. In the profile of the laser beam, a portion corresponding to the second laser beam has a power density allowing keyhole type welding.

Abstract: Disclosed is a technique for quickly detecting a defect of a portion welded by laser beam welding. Specifically disclosed is a welding step in which a welding device is used, the welding device welding an object to be welded with a pulsed laser. In the welding step, a first photodetector receives only infrared rays having a wavelength allowing detection of a keyhole formed in a molten pool from among infrared rays radiating from a welded portion during the welding of the object, and an analyzer determines quality of the welded portion on the basis of intensity of the infrared rays received by the first photodetector.

Abstract: An electrical power tool may include a base capable of contacting the work-piece, a tool main body detachably attached to the base, and an elevating mechanism that is capable of changing a relative position of the tool main body to the base. The elevating mechanism includes a male elevating member that is releasably integrated with the tool main body, a female elevating member that is attached to the base and is capable of relatively raising and lowering the male elevating member, and an integrating mechanism that is capable of releasably integrating the male elevating member with the tool main body. The tool main body is capable of being removed from the base while the male elevating member is left in the base when the male elevating member is released from the tool main body by operating the integrating mechanism.

Abstract: A work apparatus is comprised of a blower unit including a drive motor; a volute casing, a fan rotatably supported within the volute casing and driven by the drive motor, and an airflow duct connected to the volute casing, thereby blowing out or sucking in air through the airflow duct; and of an airflow tube coupled to the airflow duct of the blower unit and having an open distal end for blowing out or sucking in air through the airflow tube. The airflow tube is provided with a grip handle adapted for being held and operated by the operator. Within the airflow tube is arranged an electrically conductive wire at least between the grip handle and the open distal end, beyond which is provided an electrically grounding wire connected to the electrically conductive wire and drooping therefrom to be touchable to earth.

Abstract: A backpack work apparatus comprises a back carrier frame; a drive motor mounted on the back carrier frame; a work tool driven by the drive motor; a right and left shoulder straps; a chest strap linking the intermediate points of the right and left shoulder straps; and an emergency release buckle device provided at the point where the chest strap is coupled to the intermediate point of the left shoulder strap, which is divided by the buckle device into two parts, an upper strap and a lower strap. The buckle device normally buckles the chest strap, the upper strap and the lower strap, and is capable of releasing the lower strap and the chest strap from the upper strap via a one part motion in an emergency.