•
Recommendations for the testing of personal protection systems on industrial
trucks for rack operation in narrow aisles (Berufsgenossenschaft Handel und
Warenlogistik (BGHW))
•
Checklist for personal protection in narrow aisles (Berufsgenossenschaft Handel
und Warenlogistik (BGHW))
For the most part, these documents are available only in German. When the collision
protection field is used, all requirements must be met.
Special requirements
DIN 15185-2 and DGUV Regulation 68 in particular stipulate the following require‐
ments:
•
In narrow aisles, there must be no crossing transverse aisles. Exceptions to this
rule are transverse aisles that are intended exclusively as escape routes for oper‐
ating personnel.
•
The guide tolerance of the industrial truck and the vertical tolerance of the scan
plane of the safety laser scanner influence the detection reliability and availability
of the overall system. The maximum permissible angular error relative to the
symmetrical center position of the industrial truck in the narrow aisle determines
the guide tolerance and is ±0.3°. In addition to the guide tolerance, an additional
measurement error can occur due to the angular resolution of the safety laser
scanner (
). The total angular error must be taken
into account when dimensioning the protective fields and the collision protection
fields.
•
The industrial truck must be automatically decelerated to a maximum of 2.5 km/h
or to a standstill before moving out of the narrow aisle or to the end position of a
dead end.
•
When the industrial truck moves into the narrow aisle, the protective field must be
activated automatically (aisle detection). The protective field must be activated as
early as possible.
•
When exiting the aisle, the protective field must be active until the narrow aisle is
exited.
The following requirement in particular is stipulated in the VDMA guideline "Floors for
the use of narrow-aisle industrial trucks":
•
The floor is flat and level. Along the lanes, unevenness is less than 5 mm over a
length of 4 m.
Other requirements:
•
No retro-reflectors should be attached to the front of the rack at the level of the
scan plane. Otherwise, the protective field or the collision protection field can
trigger unwanted shutdowns, limiting the availability of the industrial truck.
•
For high availability, goods stored at the level of the scan plane must not protrude
over the rack front into the narrow aisle. Otherwise, operation with acceptable
availability of the industrial truck is not possible with the prescribed distance
between the protective field and the rack front.
Example for determining the permissible guide play of the industrial truck
The maximum permissible angular error is ±0.3°.
The angular resolution of the microScan3 with 9 m maximum protective field range is
0.1° at a 50 ms scan cycle time.
This results in a permissible guide tolerance of ±0.2°.
4
PROJECT PLANNING
54
O P E R A T I N G I N S T R U C T I O N S | microScan3 Pro I/O
8025424/1ELL/2022-01-21 | SICK
Subject to change without notice
