A22TK
Safety can be ensured, but there is a risk of human error
occurring during operation.
From
Guard Lock Safety-door Switch only
Guard Lock Safety-door Switch
Key Selector Switch (A22K)
+
When only the Door Switch is used, the operator is at risk of being
shut inside the barrier if, for example, he/she forgets to remove the
trapped key and a third party locks the door.
The safety level is enhanced by switching to maintenance mode.
However, because two different types of keys are required,
the operator is still at risk of being shut inside if he/she forgets to
remove the trapped key.
The equipment may also be started up while the operator is inside.
Different keys
I should close it.
I should close it.
I'm trapped
inside!
The equipment
started up!
Assumed risks
Assumed risks
Forgetting to
remove the key
Being
trapped inside
Forgetting to
remove the key
Being
trapped inside
Starting equipment
By using a common key, the risk of human error is reduced in operations
from when the door is open/shut until the equipment is started.
To
Guard Lock Safety-door Switch
Safety Key Selector Switch (A22TK)
+
The two locks on the door and equipment use the same key, reducing the likelihood that the user will forget to remove it.
In addition, the key cannot be removed when maintenance is being performed. This prevents the key from being lost and greatly
reduces the risk of an operator becoming trapped inside.
Same Key
A22TK
D4JL
Common key
MAINTENANCE
RUN
UNLOCK
LOCK
Start maintenance
Unlock the door
Operation double-stopped
Operation stopped
2
1
Key: Cannot be removed
Key: Can be removed
Guard Lock
Safety-door Switch
Safety Key
Selector Switch
2
D4JL
A22TK
3
1
4
I take the key with me when
I enter, so there is no worry
of becoming trapped inside!
D4JL
A22TK
MAINTENANCE
RUN
UNLOCK
LOCK
Lock the door
End maintenance
Operation starts
Operation stopped
4
3
Key: Can be removed
Key: Cannot be removed
Same Key
Enabling Grip Switch
Safety Laser Scanner
Safety Mat
or
By using the
during maintenance and by using a
to detect
Furthermore
the presence of operators, equipment malfunctions can be prevented when operators are inside, enabling a higher safety level.
2