Work safety for wood chippers
Motorway maintenance authorities, city councils and horticultural companies use these machines to shred sawn-off branches and tree trunks on site. Workers feed the machines by hand and run the risk of having their hands drawn in and suffering severe injuries.
The large hoppers of the brushwood chippers are filled with green waste from bushes, shrubs and trees by the people employed in gardening and landscaping. There is the risk that twigs and branches may become caught in the workwear resulting in the operators being drawn into the hopper of the chipper. In this situation, their hands are exposed to the greatest danger.
The non-contact operating safety device in RFID technology from U-Tech, as a supplementary hand/arm protection on stationary type A brushwood chippers according to DIN EN 13525, is suitable for manually fed, horizontal or nearly horizontal feed hoppers. At the end of the feed hopper there are mechanically feed elements (or chipping tools, which act as mechanical feed elements), which draw in the material to be chipped.
U-Tech recommends that the people to be protected must be obligated by company agreement to wear personal safety equipment when working with brushwood chippers. This includes a hard hat with integrated facial protection (visor) and hearing protection. The safety equipment also includes a person detection module (PEB), which is an integral part of the hard hat.
It should be noted that the U-Tech system may only be used as an additional safety device for hand/arm protection on type A brushwood chippers according to DIN EN 13525. For type A machines, the minimum length of the feed hopper (and thus the safety distance) and the height of the lower edge is set at over 600 mm above the ground.
By comparison, the height of the lower edge of the feed hopper above the ground is less than 600 mm for type B machines according to DIN EN 13525, combined with a higher risk of danger, in particular for the lower limbs, which remain unprotected with a PEB arrangement in the hard hat.
The GSG206 consists of three components: Safety helmet with a transponder incorporated into the ear defenders, control unit and antenna.
The GSG206 is an electronic safety device which, in conjunction with the transponder incorporated into the ear defenders, causes the wood chipper to shut down if hands (and therefore automatically also ear defenders) are placed too far inside the filling chute of the chipper. This prevents hands from being injured by the feed rolls.