BS EN 1034-1:2021 pdf free download – Safety of machinery一Safety requirements for the design and construction of paper making and finishing machines Part 1: Common requirements.
5.3 Crushing hazards
In order to avoid crushing hazards between fixed and moving or between moving machine parts, the minimum distances specified in EN ISO 13854:2019 shall be applied. Crushing hazards can also be avoided by limiting the forces applied at the crushing point to a non-hazardous level such that the movement can be stopped by reactive body force.
NOTE As long as there is no relevant standard to refer to, it is taken that forces of less or equal 150 N generally do not present a risk of injury if it isa low-impulse movement and the contact surfaces are even or padded.
5.4 Drawing-in hazards on rollers, cylinders, rolls, felts and wires or trapping hazards at reel fronts
5.4.1 General requirements
Where drawing-in hazards exists on inrunning nips, wrapping points or trapping points at reel fronts, the related hazard points should preferably be safeguarded by one or a combination of the following protective measures:
a) Safety distances according to EN ISO 13854:20 19
b) Fixed guards in accordance with EN ISO 1412 0:2015 and Table 2 as well as Table 4 of EN ISO 13857:2019. If access is frequently necessary: Interlocking guards in accordance with EN ISO 14119:2013.
5.4.2 Safety measures on inrunning nips
The drawing-in hazards existing on inrunning nips of cylinders, rollers and rolls shall be avoided, wherever possible without restraining machine function, by providing adequate distance between rotating parts and fixed parts.
The hazard of the whole body being drawn in is prevented if there is a safety distance of 500 mm between machine parts at the inrunning nip. See Figure 1.
The hazard of an arm being drawn in is prevented if there is a safe distance of at least 120 mm between machine parts at the inrunning nip. Applying the safety distance for the arm is only allowed if the inrunning nip cannot be reached by the body.
Inrunning nips where drawing-in hazards cannot be avoided shall be protected by guards. NOTE This applies, for example, in press sections.
Suitable guards are:
— fixed or interlocking guards (e.g. nip bars) with guard locking according to EN ISO 14120:20 15 and EN ISO 14119:2013;
— fixed or interlocking distance guards with guard locking according to EN ISO 14120:2015 and EN ISO 14119:2013;
— fixed or interlocking perimeter fences with guard locking according to EN ISO 14120:2015 and EN ISO 14119:2013.
Fixed machine parts such as housings and frames which prevent access to a danger point can also partly or completely function as guarding element. Fixed guards are selected where access to an inrunning nip is not required.
Round sections shall not be considered suitable as nip guards as they create new inrunning nips.
The gap between the guard and rotating machine parts should be as small as possible and shall not be more than 8 mm. The corner between the outer surface of the guard protecting the inrunning nip and the tangent line of the roller surface shall be obtuse or right angled, i.e  90°. See Figure 3.
For guards that are not arranged directly on the inrunning nip, the distances listed in Table 2 of EN ISO 13857:20 19 shall apply. The following points shall be taken account of: The relevant distance “c” between the guarding element and the danger area according to Figure 2 of EN ISO 13857:2019 is, when applied to inrunning nips, identical with the distance between guarding element and that plane in the inrunning nip where the distance “e” is equal or more than 25 mm between the roller surfaces or between roller surface and fixed part. See Figure 4.