摘要:
Two or more parts feeding sections are provided, and in each of the parts feeding sections, identical combinations of parts cassettes aligned in the same arrangement are prepared. If one or more type of components that are to be picked up at one time by a plurality of suction nozzles is exhausted, the mounting head moves to the other parts feeding section, which provides the same combination of components for all the suction nozzles to pick up the components at one time, so that the mounting operation can be continued without stopping the apparatus for replenishment of components.
摘要:
Two or more parts feeding sections are provided, and in each of the parts feeding sections, identical combinations of parts cassettes aligned in the same arrangement are prepared. If one or more type of components that are to be picked up at one time by a plurality of suction nozzles is exhausted, the mounting head moves to the other parts feeding section, which provides the same combination of components for all the suction nozzles to pick up the components at one time, so that the mounting operation can be continued without stopping the apparatus for replenishment of components.
摘要:
An optical pickup apparatus for optically reading the data stored in a flat information carrier disc in the form of tiny pits. The pickup apparatus directs a beam of light from a light source to the disc surface. The impinging beam is modulated by the data pits and reflected back to a photodector. A novel optical grating assembly is disposed between the light source and the information disc, and includes a diffraction grating for the light beam from the source and a holographic grating for directing part of the light beam reflected by the disc to the photodetector. The diffraction and holographic gratings are formed integral with each other into the grating assembly.
摘要:
It is intended to provide an electronic component mounting device and an operation performing method for mounting electronic components so that both the operation quality and the productivity can be improved. Height precision division information that divide the height precision required for up and down movements of operating heads into the first division which indicates a normal height precision and the second division which indicates that a high height precision is required based on the type of electronic components are stored as operation data beforehand. In operation performing procedures, when an electronic component belongs to the first division, an operating head is made to move up and down based on an approximate operation position height derived from an approximate curved surface of the top surface of a board which is calculated by using the height measurement result obtained by measuring a plurality of height measuring points on the surface of the board, and when the electronic component belongs to the second division, the operating head is made to move up and down based on an individual operation position height obtained by individually measuring the board height at the operation position.
摘要:
A quick acceleration fluid coupling comprising: a fluid coupling working chamber defined by an impeller attached to a driving shaft, a runner attached to a driven shaft, and an impeller casing attached to the impeller and surrounding the runner; and a passage for supplying hydraulic oil into the fluid coupling working chamber; wherein the passage includes a control valve operable to be fully opened and closed rapidly, and a bypass passage having an oil control orifice, which bypasses the control valve; thereby the rotational speed of the driven shaft can be changed rapidly from the lowest to the highest or vice versa.
摘要:
A device for supporting an object lens in an optical head includes a substantially parallelepipedic link mechanism (5), a rotatable member (16) rotatable in the parallelepiped, a second hinge member (15) connecting the rotatable member (16) to the inner wall of one plate (10) of the link mechanism (15) to make it possible to rotate the rotatable member about an axis parallel to the optical axis of the object lens (1), a lens holding member (2) supported by the rotatable member (16) and holding the object lens (1), and a base (17) for substantially holding another plate (12) of the link mechanism.
摘要:
Disclosure herein is novel oxalic acid ester derivatives represented by the general formula: ##STR1## wherein either one of X and Y represents a nitro group, and the other represents ##STR2## in which R represents a lower alkyl group, and n represents a figure of 1-50. The oxalic acid ester derivatives are useful as chemiluminescent reagents for fluororescent substances.
摘要:
The present invention relates to a power generating system which can recover exhaust heat from a working fluid of a fluid coupling and utilize the recovered exhaust heat to generate power. In the power generating system, water is supplied to a boiler (1) by a feed pump (BP) to generate steam, a steam turbine (2) is driven by using the generated steam to generate power, the steam discharged from the steam turbine (2) is condensed in a condenser (4), and then the condensed water is resupplied to the boiler (1) by the feed pump (BP). The power generating system includes a fluid coupling (10) provided between the feed pump (BP) and a motor (M) to transmit a torque from the motor (M) to the feed pump (BP) by a working fluid, and the condensed water supplied from the condenser (4) is heated by the working fluid discharged from the fluid coupling (10).
摘要:
The lens driving device according to the present invention concentrates a light beam emitted by a light source and reflected by a mirror onto a recording layer of a recording medium by use of an objective lens and includes an objective lens holding section for holding the objective lens so that the objective lens is movable in an optical axis direction, and the objective lens holding section is shaped so that the objective lens holding section is prevented from touching the mirror when the objective lens is made closer to the mirror. As a result, it is possible to reduce a space necessary for preventing the objective lens holding section from touching the mirror, so that it is possible to provide the lens driving device which is made thinner.
摘要:
A fluid coupling transmits power from a drive side to a driven side by utilizing kinetic energy of fluid such as oil. The fluid coupling comprises a pump impeller (4) provided on a drive shaft (1), a turbine impeller (5) provided on a driven shaft (9), a housing (20) fixed to the pump impeller (4) and surrounding the turbine impeller, and a multiple disc clutch provided between a drive shaft side and a driven shaft side. The multiple disc clutch is operated to couple the drive shaft (1) and the driven shaft (9) mechanically so that the drive shaft and the driven shaft are rotated at the same rotational speed. Thus, the fluid coupling can improve a power transmitting efficiency because of no slip between the rotational speed of the drive shaft and the rotational speed of the driven shaft.