| 摘要 |
In a pulling device for a roll shaft for roller blinds or screens, a cord pulley 2 is situated in a housing 1 provided with a passage opening 4 for cord parts 3a, 3b. A clamp 7 is disposed in a chamber 6 in said housing 1 and about the said cord parts 3a, 3b. Said clamp becomes operative when the cord pulley 2 is turned by the weight of the respective blind or screen. |
