EN 1870-4-2012 pdf download.Safety of woodworking machines – Circular sawing machines -Part 4: Multiblade rip sawing machines with manual loading and/or unloading.
5.3.5.1.2.4 AntI-splinter fingers below the table
On machines where at least one saw blade spindle cutting against the feed is mounted above the workpiece support, a row of anti-splinter fingers shall be fitted below the machine table.
It shall extend over the full infeed opening width of the machine
As an exception for the machines where the anti-splinter devices above the table extend below the work piece conveyor, the anti-sphnter row below the table shall extend over the full width cutting capacity of the machine.
The distance Limax between the anti-splinter fingers Type 1 and the anti-splinter fingers mounted below the table shall be such that no splinter escapes from the machine. The anti-spinter fingers below the table shall be In accordance with the following requirements:
a) a mechanical stop shall be provided so that the angle between the lower exposed surface of each finger and the horizontal does not exceed 850 (see Figure 17);
b) the thickness of each spacer between the fingers shall be a minimum of 0,5 mm and a maximum of 1mm;
c) the sides of each finger shall be flat and parallel to each other within ± 0,5 mm:
4) it shall be fitted above the table across the full Infeed opening of the machine and extend down to the table or to within 1 mm of the workpaece feeding system.
b) at least one row of anti-splinter fingers type 1 mounted above the table as described in a) to g) of
5.3.5.1.2.3.2.
Verification: By checking the relevant drawings, inspection of the machine, measurement and relevant functional testing on the machine,
NOTE For the strength characteristics a confirmabon from the manufacturer of the matehal can be useful.
5.3.5.2 Outfeed end of the machine
5.3.5.2.1 Machines designed for climb cutting
At the outfeed, where the saw blades or the most rearward saw blades are climb cutting, there shall be a tunnel guard having a totally enclosed end and allowing side or bottom off loading. The end wall and the side walls of the tunnel guard shall be designed and constructed to retain any workpiece ejected in the area defined by the vertical planes of the two outermost saw blades (see Figure 18. area Y). Particular attention shall be given to the area of the end wall equivalent to and in line with the outfeed opening (area Z of Figure 18).
Other parts of the outfeed tunnel guard shall be manufactured from materials which are in accordance with the requirements of 5.3.2.
Access to the outfeed opening defined by the width of the outfeed opening in Figure 18, shall be prevented in accordance with reach distances set out in Tables 2 and 4 of EN ISO 13857:2008.
In addition, it shall not be possible for a splinter ejected in a straight line at any angle (i.e. any direction) from any point of the outfeed opening to escape from the tunnel befOre deflection. Mesh shall not be used to fulfil this requirement
Access to the inside of the tunnel shall be provided and shall be via a moveable interlocked guard with guard locking taking account of ergonomics principles in EN 614-1 :2006+A1 :2009. Access to the inside of the tunnel shall be prevented according to safety distances in accordance with EN ISO 13857:2008. Where there is need to see into the tunnel, polycarbonate or equivalent plastic shall be used or louvers type tunnel. See for example Figure 19,
Verification: By checking the relevant drawings, measurement, inspection of the machine and relevant functional testing on the machine.
NOTE For the ultimate tensile strength a confirmation from the manufacturer of the material can be useful.EN 1870-4-2012 pdf download.