Traversing hoists – Overhead – Self-propelled trolley
Reexamination Certificate
1999-12-22
2001-07-31
Brahan, Thomas J. (Department: 3652)
Traversing hoists
Overhead
Self-propelled trolley
C212S317000, C212S318000
Reexamination Certificate
active
06267259
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an overhead travelling carriage, and in particular, to the control of the position of the overhead travelling carriage relative to a station.
BACKGROUND OF THE INVENTION
An overhead travelling carriage runs along a running rail provided near a ceiling of a factory or a warehouse in order to transfer and load articles on stations. The overhead travelling carriage comprises, for example, a body, an elevating and lowering drive section, and an elevating and lowering section driven by the elevating and lowering drive section to elevate and lower to chuck an article. If any station is offset from a position immediately under the running rail, it is difficult to transfer articles between the overhead travelling carriage and this station. In addition, the transfer is difficult when the station requires chucking from a predetermined direction and if the overhead travelling carriage is offset from this direction. Correcting these points requires a complicated mechanism in the overhead travelling carriage.
An object of the present invention is to use a simple configuration to enable a locational offset from a station perpendicular to the running direction of the overhead travelling carriage or an directional offset from a station within a horizontal plane to be corrected in order to transfer and load articles on these stations.
An additional object of the invention is to provide a simple mechanism for movements perpendicular to the running direction and rotational movements within a horizontal plane.
An additional object of the invention is to provide a configuration for enabling the elevating and lowering drive section to be moved or rotationally moved in a horizontal direction.
SUMMARY OF THE INVENTION
The present invention is an overhead travelling carriage comprising a body running along a running rail and an elevating and lowering drive section provided under the body to drive the elevating and lowering section, characterized in that the elevating and lowering section is installed on the body so as to be moved perpendicularly to a running direction and to be rotationally moved in a horizontal direction.
Preferably, a position control means is provided to independently move the both running-direction ends of the elevating and lowering section perpendicularly to the running direction.
Furthermore, it is preferable that a rotationally moving shaft be provided on the elevating and lowering drive section, and that a member for guiding the rotationally moving shaft so as to rotationally move in a horizontal direction and to move perpendicularly to the running direction be provided on the bottom of the body.
REFERENCES:
patent: 666123 (1901-01-01), Wellman et al.
patent: 1367907 (1921-02-01), Andrews
patent: 2553378 (1951-05-01), Miller
patent: 3061111 (1962-10-01), Riemenschneider
patent: 4750132 (1988-06-01), Pessina et al.
patent: 5492443 (1996-02-01), Crorey et al.
patent: 750697 (1967-01-01), None
patent: 2761453 (1978-10-01), None
patent: 9-77474 (1997-03-01), None
patent: 2845067 (1998-10-01), None
Armstrong Westerman Hattori McLeland & Naughton LLP
Brahan Thomas J.
Murata Kikai Kabushiki Kaisha
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