Title:
LEVELLING DEVICE
Document Type and Number:
Japanese Patent JP3115420
Kind Code:
B2
Abstract:
PURPOSE: To provide a levelling device which can easily perform the levelling by operating jacks by means of a switching means and an operation indicating means, also which can automatically perform the levelling by a detecting means and a control unit, and its abovementioned performance can be realized with its simple structure by only providing the switching means, the operation indicating means, the detecting means, and the control unit.
CONSTITUTION: This levelling device levels an object A to the datum level such a level surface by jacks 3 placed in the four corners of the object A. And it is provided with a selecting switch 10 for selecting two operatable jacks 3 in either X or Y directions, an operation switch 11 for simultaneously extending and shortening two jacks 3, on the side not including the datum level, out of the combinations selected by the selecting switch 10, a tilt angle sensor 1 for detecting the tilt of the object A, and a control unit 12 for stopping the operation of the jacks 3 every time the amounts of the tilt in both X and Y directions become zero.
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Inventors:
Kazunori Nakagami
Application Number:
JP19915792A
Publication Date:
December 04, 2000
Filing Date:
July 02, 1992
Export Citation:
Assignee:
Showa Aircraft Industry Co., Ltd.
International Classes:
B66F7/20; (IPC1-7): B66F7/20
Domestic Patent References:
| JP55135290A | ||||
| JP597698A | ||||
| JP356793U | ||||
| JP2133711U |
Attorney, Agent or Firm:
Koshi Motonobu
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