Abschnitt 7 - Particular safety requirements for long stopping distances of the transfer car
Moving areas of transfer cars with long stopping distances have to be safeguarded, e.g. by safety fences at a height of at least 2 m.
Transfer cars with stopping distances of more than 2.5 m require particular safety measures. Due to the high speeds of the transfer car there is a risk for the employees located in the danger area that cannot be sufficiently assessed. Therefore an additional safeguarding of the danger area is necessary.
This has to be carried out in the form of an extensive danger zone safeguarding. The access to the danger area of the transfer car must be prevented over the entire track from all sides. According to → DIN EN ISO 13857 "Safety of machinery/Safety distances to prevent hazard zones being reached by upper and lower limbs" this can be done by separating safety devices, e.g. fences at a height of at least 2 m in combination with photocells (light barriers) installed at the access openings (doors) affecting the moving drive of the transfer car.
It is also possible to carry out a sectional safeguarding of the danger zones by installation of switchable light sensor systems. These are connected to the moving drive of the transfer car and upon activation of the light sensor system this leads to an immediate standstill. The stopping distance results from the covered distance starting from the detection of the obstacle up to the standstill of the transfer car taking into account the time for the electronic evaluation.
Further information
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DIN EN ISO 13857 "Safety of machinery/Safety distances to prevent hazard zones being reached by upper and lower limbs"