Device making an improvement to an unwinding device assisted by a pull tie tensioned by an elastic member contained in the bar for pulling the element

摘要

Device making an improvement to an unwinding device assisted by a pull tie tensioned by an elastic member contained in the bar for pulling the element. This device is characterised in that the unwinding spindle 20 is fixed to a frame 3 which includes two guide pulleys 4-5 for the pull tie 16-17, two guiding slideways 13 in which two guide end-pieces 8-9, placed on the ends of the pull bar 12, move under the traction of two pull ties 16-17 returned through 90 DEG by the end-pieces 6-7 inside the bar where they form a loop passing around a movable pulley 6-7 fixed at each respective end of a tensioning member 14, in order subsequently to emerge from the outer ends of the pull bar 12. Application: roller blind for a glass roof, veranda, etc. IMAGE