Industrial robot

Details Industrial robot Industrial robot

2001-03-27

2002-08-20

Cuchlinski, Jr., William A. (Department: 3661)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Robot control

C700S017000, C700S083000, C700S110000, C700S247000, C700S257000, C318S567000, C318S568240, C701S023000, C901S003000

Reexamination Certificate

active

06438455

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an industrial robot having an input connector for wiring to a safety device from outside.
BACKGROUND OF THE INVENTION
Recently, higher safety of an industrial robot is demanded. Generally, an industrial robot has a safety device for stopping instantly, and an input to the safety device.
Such robot will be explained by referring to FIG.
2
. An industrial robot has a safety device for stopping instantly and an input connector
15
, which is disposed on a robot controller, of the safety device. The connector is connected from the outside, for example, an emergency stop switch
11
, an open/close confirm switch of a safety fence
12
, a dead-man switch
13
, or a control device
14
of robot to be wired from outside.
These switches are generally input with contacts, having a b-contact, which is normally closed and is opened when pressed.
When the robot and peripheral devices are installed, a peripheral safety fence, an emergency stop switch, and an input wiring to safety device are often installed or wired simultaneously. Or, the input wiring may be connected after the robot is installed. At this time, the safety device is set in the cancel mode where the switch having the b-contact is shorted, and may fail to function.
The installation and wiring of the peripheral safety fence and the wiring of the emergency stop switch must be completed by the time when the robot is ready to work. But the robot may start to operate before the completion, or the robot may work even when set in cancel mode due to a wrong operation by an operator.
SUMMARY OF THE INVENTION
An industrial robot alerting caution to an operator and enhanced in safety is presented. The robot has identical input connectors for safety devices wired from the outside. The connector has a status terminal for feeding a status aside from terminals connected to the safety devices. Depending on the status from the outside, a display device displays a warning sign only during a controller of the robot is operated.
The robot makes the operator pay attention to that the robot works before the completion of installation and wiring of a peripheral safety fence or wiring of an emergency stop switch or in cancel mode due to a human error.


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