摘要:
A rotary body 15 rotatable about a vertical axis trereof is set at a mounting head 7. An cam 17 having a cam surface at a lower end thereof is arranged along the periphery of a lower part of the rotary body 15. Each of outer cylinders 18 is rotatably set in the periphery of the rotary body 15, wherein each of nozzle shafts 22 with each suction nozzle 23 fitted at lower ends thereof penetrates each outer cylinder 18 in a freely movable manner in an up/down direction. An engaging part 21 for a rotary device is provided at an upper end of each outer cylinder 18, and an engaging device 28 for the cam 17 is placed at a lower part of each nozzle shaft 22 projecting from a lower end of each outer cylinder 18.
摘要:
An electronic component mounting method for sucking up an electronic component and placing it onto a board with a suction nozzle, includes a step of switching over air pressure switching timings for the suction nozzle when the component is sucked with the suction nozzle and when the sucked component is mounted on the board according to a velocity of up and down movement of the suction nozzle and independently for each of when the component is sucked with the suction nozzle and when the sucked component is mounted on the board. An electronic component mounting apparatus includes a suction nozzle for sucking an electronic component and placing it onto a board, a device for moving up and down the suction nozzle for suction and mounting of the electronic component, an air pressure switching unit for switching air pressure to the suction nozzle at an electronic component suction position and an electronic component mounting position, and a switching drive unit for performing switching control of the air pressure switching unit independently for each of when the component is sucked with the suction nozzle and when the sucked component is mounted on the board.
摘要:
A rotary body 15 rotatable about a vertical axis trereof is set at a mounting head 7. An cam 17 having a cam surface at a lower end thereof is arranged along the periphery of a lower part of the rotary body 15. Each of outer cylinders 18 is rotatably set in the periphery of the rotary body 15, wherein each of nozzle shafts 22 with each suction nozzle 23 fitted at lower ends thereof penetrates each outer cylinder 18 in a freely movable manner in an up/down direction. An engaging part 21 for a rotary device is provided at an upper end of each outer cylinder 18, and an engaging device 28 for the cam 17 is placed at a lower part of each nozzle shaft 22 projecting from a lower end of each outer cylinder 18.
摘要:
This invention relates to a multi-layered dielectric element serving as a capacitor or actuator which comprises a dielectric unit (16) including a plurality of dielectric layers (12) made of a perovskite oxide and a plurality of internal electrode layers (14, 14') sandwiched between the respective dielectric layers. The internal electrodes (14, 14') are each made of at least one conductive composite oxide of La, Ba and Cu having a perovskite-like structure wherein the atomic ratios of the metals are such that (La + Ba)/Cu = 1 and La/Ba = 4, or at least one conductive composite oxide of La, Sr and Cu having a perovskite-like structure wherein the atomic ratios of the metals are such that (La + Sr)/Cu = 1 and La/Sr = 3 or 4. The unit is sintered at a temperature of from 900 to 1100°C.
摘要:
This invention relates to a multi-layered dielectric element serving as a capacitor or actuator which comprises a dielectric unit (16) including a plurality of dielectric layers (12) made of a perovskite oxide and a plurality of internal electrode layers (14, 14') sandwiched between the respective dielectric layers. The internal electrodes (14, 14') are each made of at least one conductive composite oxide of La, Ba and Cu having a perovskite-like structure wherein the atomic ratios of the metals are such that (La + Ba)/Cu = 1 and La/Ba = 4, or at least one conductive composite oxide of La, Sr and Cu having a perovskite-like structure wherein the atomic ratios of the metals are such that (La + Sr)/Cu = 1 and La/Sr = 3 or 4. The unit is sintered at a temperature of from 900 to 1100°C.
摘要翻译:本发明涉及一种用作电容器或致动器的多层介质元件,它包括一个介电单元(16),它包括由钙钛矿氧化物制成的多个电介质层(12)和多个内部电极层(14,14' )夹在相应的电介质层之间。 内部电极(14,14')各自由具有钙钛矿型结构的La,Ba和Cu的至少一种导电复合氧化物制成,其中金属的原子比使得(La + Ba)/ Cu = 1 和La / Ba = 4的至少一种导电复合氧化物,或具有钙钛矿型结构的La,Sr和Cu的至少一种导电复合氧化物,其中金属的原子比使得(La + Sr)/ Cu = 1和La / Sr = 该单元在900至1100℃的温度下烧结。
摘要:
An air/fuel ratio sensor to be used for controlling the ratio between the air and fuel through the detection of the air and the fuel in the exhaust gas of gas and oil combustion appliances, automobile engines or the like. The air/fuel ratio sensor has a first electrode on one face of porous zirconia electrolytic plate of through-holes, a second electrode containing at least electrode -0 2 ion mixed conductor on the other face. The controlling of the air/fuel ratio from the excessive fuel to the excessive air may be performed in the condition of the high S/N ratio from the excessive fuel to the excessive air through the measurement of the changes in the electric resistance of the second electrode by the third electrode provided on the second electrode. The sensor is simpler in construction and is smaller and thinner in size.
摘要:
An air/fuel ratio sensor to be used for controlling the ratio between the air and fuel through the detection of the air and the fuel in the exhaust gas of gas and oil combustion appliances, automobile engines or the like. The air/fuel ratio sensor has a first electrode on one face of porous zirconia electrolytic plate of through-holes, a second electrode containing at least electrode -0 2 ion mixed conductor on the other face. The controlling of the air/fuel ratio from the excessive fuel to the excessive air may be performed in the condition of the high S/N ratio from the excessive fuel to the excessive air through the measurement of the changes in the electric resistance of the second electrode by the third electrode provided on the second electrode. The sensor is simpler in construction and is smaller and thinner in size.