Title:
STATE MONITORING DEVICE AND STATE MONITORING METHOD
Document Type and Number:
Japanese Patent JP2020002553
Kind Code:
A
Abstract:
To provide a state monitoring device and a state monitoring method which can be applied to an existing mechanical parking device without changing a lifting mechanism of a pallet (carrier) and can detect an abnormality in the lifting mechanism including the inclination of the pallet.SOLUTION: A state monitoring device 20 includes a first photoelectric sensor 22A, a second photoelectric sensor 22B, and a monitoring controller 30. The first photoelectric sensor 22A and the second photoelectric sensor 22B are fixed to stationary positions outside the lifting range of a pallet 12, respectively, and are positioned at intervals in the longitudinal direction (or the width direction) of the pallet 12 so as to detect the pallet 12 whose attitude (for example, horizontal) is held at the same time. The monitoring controller 30 calculates a first time difference Δt1 of detection signals 25 of the first photoelectric sensor 22A and the second photoelectric sensor 22B when the pallet 12 is moved up and down, and outputs an abnormal signal when the first time difference Δt1 exceeds a first threshold K1.SELECTED DRAWING: Figure 4
Inventors:
NITO TAKASHI
TOMIYAMA ATSUSHI
KASHIWAGI TAKASHI
MOCHIZUKI KENJI
TOMIYAMA ATSUSHI
KASHIWAGI TAKASHI
MOCHIZUKI KENJI
Application Number:
JP2018120505A
Publication Date:
January 09, 2020
Filing Date:
June 26, 2018
Export Citation:
Assignee:
IHI TRANSPORT MACHINERY CO LTD
IHI FUSO ENG CO LTD
IHI FUSO ENG CO LTD
International Classes:
E04H6/06; E04H6/18; E04H6/42
Domestic Patent References:
| JP2006313680A | 2006-11-16 | |||
| JP2007126835A | 2007-05-24 |
Attorney, Agent or Firm:
Minoru Hotta
Toshihiro Nomura
Toshihiro Nomura