FIELD: devices for withdrawal of service platform from launch vehicle sides. SUBSTANCE: proposed cargo drive includes vertically movable cargo and pull rope whose one end is connected to cargo through return driving pulley and its other end is connected to service platform. Cargo is made in form of group of chains, anchor chains for example located for self-stowing in chain locker in the course of down motion. End of pull rope connected to service platform is secured to this platform for adjusting its length through drum of winch equipped with self- braking mounted on service platform. Group of chains is connected to return driving pulley through cross-piece vertically movable in guides. Drive is provided with lock for keeping the cross- piece with group of chains in extreme upper position; locking rod is articulated with service platform and is provided with fork for articulation with hook of lock. Above-mentioned lock is located below service platform on its fixed base; lock is self-closing due to motion of locking rod after release of its locking unit. Chain locker is provided with shock- resistant floor. EFFECT: possibility of changing force acting in the course of withdrawal of service platform. 5 cl, 4 dwg
