Patents by Inventor Akiyoshi Nakada

Akiyoshi Nakada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5247733
    Abstract: A component assembling apparatus includes an intermittently rotatable index table for holding a plurality of positioning tools for use in positioning components to be assembled, and an index table driving mechanism for intermittently rotating the index table. The apparatus also includes a component feeding device for feeding one of the components and holding the component at a removal position of the device, a tool container for storing the plurality of assembling tools for assembling the components, and an arm robot for removably securing one of the assembling tools at its end. The arm robot is operable to move the component from the removal position of the component feeding device to a predetermined position of the positioning tool on the table, and to assemble the component on the positioning tool. An arm robot driving mechanism is provided for actuating the arm robot and the assembling tool.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: September 28, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hitoshi Kubota, Hiroshi Nakagawa, Toshitsugu Inoue, Akiyoshi Nakada, Manabu Yamane, Hideki Tsutsumi
  • Patent number: 4904152
    Abstract: In an industrial robot including a control apparatus capable of executing control of the robot in a position control mode, a velocity control mode and a current control mode. The control apparatus includes a changeover section (20) for executing changeover between the position control mode and the current control mode. The position of an object is sensed by driving a set of arms of the robot in a force control mode which is a combination of the velocity control mode and the current control mode, and detecting the position at which the arms contact an object and are halted. Detection of the halted condition is performed based on a condition of an output signal produced from a position sensor (13), and by repetitively performing such detection for a plurality of different points on the body surface, a plurality of position values are derived which are compared with reference position data.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: February 27, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Makoto Doi, Akiyoshi Nakada, Toshitsugu Inoue, Mikio Hasegawa, Kenji Sogawa, Toshihiro Ide
  • Patent number: 4802815
    Abstract: A dust-free industrial robot of high performance includes an internal air space substantially closed by arms, articulation members, bearings or covers or a combination thereof in a manner to separate the rotating, sliding and contacting portions of structural elements such as the arms, articulation members, bearings and a drive source from the outside air. The air pressure in the internal air space is made lower than that of the outside air to prevent dust produced during the operation of the robot from being scattered to the outside air.
    Type: Grant
    Filed: August 6, 1985
    Date of Patent: February 7, 1989
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takanori Funabashi, Akiyoshi Nakada, Haruo Tada
  • Patent number: 4737697
    Abstract: Disclosed is an industrial robot of the type wherein the robot arm is directly driven by a motor. A position encoder generates a signal representative of the actual position of the arm and a manually controlled position entry switch is operable during a teaching mode. When the arm is manually moved to a desired position, a memory controller responds to the operation of the position entry device by storing the actual position signal in a memory as a target position signal, and reads the stored signal during a playback mode. A servo-control system responds to the actual position signal from the encoder and the target position signal from the memory by controlling the motor so that the actual position of the arm approaches the desired position during the playback mode. The output of the servo-control system is decreased during the teaching mode to render the arm manually movable to the desired position and is increased during the playback mode.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: April 12, 1988
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tomohiro Maruo, Toshitugu Inoue, Akiho Hirahata, Akiyoshi Nakada, Yoshiaki Makizawa
  • Patent number: 4697978
    Abstract: The disclosure relates to an industrial robot free from generation of dust, which is provided with and internal space formed by covering rotating portions and contact portions of its arm members, joint members, bearing members or driving source, by the arm members, joint members, bearing members, or a cover member, or by a combination of these members, and air throttling portions provided in air passages for connecting the internal space with external air so as to separate the internal spaced from external air by sucking the air in the internal space. By the above air throttling portions, air within the internal space is isolated from the external air, and thus, scattering of dust from the dust generating portions toward the atmosphere is advantageously prevented.
    Type: Grant
    Filed: July 26, 1985
    Date of Patent: October 6, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Haruo Tada, Akiyoshi Nakada
  • Patent number: 4552504
    Abstract: An industrial robot is constituted by a plurality of series connected arm units each composed of a driving unit from among a plurality of driving units having different driving powers and different driving speeds, a joint unit from among a plurality of joint units having different driving speeds and power transmitting capacities, and an arm from among a plurality of arms having different sizes and load capacities. The joint units, driving units and arms each have connecting surfaces thereon having positioning parts and setting-fixing parts in a predetermined pattern for enabling the joint units, driving units and arms to be detachably connected to other joint units, driving units and arms at corresponding connecting surfaces to form arm units with the desired joint units, driving units and arms. The joint units each have a stationary frame and a follower frame rotatably connected to each other and driving power transmitting mechanism connected between said frames and including reduction gears.
    Type: Grant
    Filed: January 31, 1984
    Date of Patent: November 12, 1985
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akiyoshi Nakada, Toshitugu Inoue, Haruo Tada, Kiyoshi Shinki, Kuninori Takezawa, Makoto Doi
  • Patent number: 4522555
    Abstract: Upper parallelogram links (8, 8, 5, 12) and lower parallelogram links (14, 14, 12, 17) are series connected at an intermediate driving unit 12 with direction of the journal shafts (7, 7, 10, 10) of the upper parallelogram links and direction of the journal shafts (13, 13, 16, 16) of the lower parallelogram links being perpendicular to each other; thereby a third driving unit 17, to which a shaft of a hand 19 is mounted, is always kept in parallel to a first driving unit 5 irrespective of the position of the hand 19; thus a reliable handling by hand is assured, and also accurate horizontal motions are attainable with conventional computing means.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: June 11, 1985
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshitsugu Inoue, Akiyoshi Nakada, Haruo Kaji, Makoto Doi, Kuninori Takezawa