Title:
ELEVATION CONTROL DEVICE OF CARRIER DEVICE
Document Type and Number:
Japanese Patent JP3237938
Kind Code:
B2
Abstract:
PURPOSE: To extremely reduce error due to slipping down in an initial state at the time of elevation work of a handling mechanism in a carrier device and to heighten reliability of a motor driving system.
CONSTITUTION: A carrier device furnished with a handling mechanism, a motor and an elevation mechanism on a carrier carriage is furnished with in addition to a control means 47 for main work to carry out specified handling mechanism elevation work, a displacement amount detection means 48 to detect an initial displacement amount of the handling mechanism in the descending direction and an initial state correction control means 49 to carry out correction control to lift the handling mechanism to a normal initial position in accordance with this detection in advance of handling mechanism lowering work at the time when the initial displacement amount is lower than a set value.
Inventors:
Keiji Yamamoto
Application Number:
JP532893A
Publication Date:
December 10, 2001
Filing Date:
January 14, 1993
Export Citation:
Assignee:
YAMAHA HATSUDOKI KABUSHIKI KAISHA
International Classes:
B66F17/00; B66C13/22; (IPC1-7): B66C13/22; B66F17/00
Domestic Patent References:
| JP4243797A | ||||
| JP6397597A | ||||
| JP5456377U | ||||
| JP62161199U |
Attorney, Agent or Firm:
Etsushi Kotani (3 outside)