Easy-to-use safety net device

A safety screen device (9) with an outer shell (11), a rotatable the bracket is provided with a wireline side of the shell, (14) and a wireline the coiling cylinder (13) is fixed with the emergency of a spring spiral spring in the direction of the wireline ring (13) is safety net (12) and winding plated with screwed in advance. The safety net (12) is angle with staking (21); the stakes to be is located on the vehicle body the fixing slot (24) mile. A digital is configured the operator is reduced labour-saving is provided with a hanging is close to down, is arranged in a braking device (25); when the safety net (12) back of the shell (11) mile, which a brake device at least accepting one part of resiliences, being a safety net (12) pulled out (21) is a hanging into the fixing slot (24) mile to the pull rod of the shell (11) mile. The braking device (25) can be removed a storage 1-5, and movement of probably causing the safety net (12) and coiling the shell (11) mile.