Patent ID: 7222697

Claim:
An elevator, comprising: a first upper pulley set, wherein the first upper pulley set comprises a plurality of first upper pulleys installed side by side in a fixing frame; a second upper pulley set located beside one side of the first upper pulley set, wherein the second upper pulley set comprises a plurality of second upper pulleys installed side by side in the fixing frame; a carriage located below the first upper pulley set and the second upper pulley set; a first lower pulley set corresponding to the first upper pulley set, wherein the first lower pulley set comprises a plurality of first lower pulleys installed side by side on a top of the carriage, and the amount of the first lower pulleys is the same with that of the first upper pulleys; a second lower pulley set located beside the first lower pulley set and corresponding to the second upper pulley set, wherein the second lower pulley set comprises a plurality of second lower pulleys installed side by side on the top of the carriage, and the amount of the second lower pulleys is the same with that of the second upper pulleys; a rotary wheel installed in the carriage, wherein the carriage comprises a partition member to divide the rotary wheel into a first reel region and a second reel region; a first steel rope connecting the first upper pulleys, the first lower pulleys and the rotary wheel, wherein one end of the first steel rope is fixed to the fixing frame beside the other side of the first upper pulley set, the first steel rope alternately connects the first lower pulleys and the first upper pulleys from the closest one of the first lower pulleys by using the end of the first steel rope as a beginning, and the other end of the first steel rope is connected to the first reel region of the rotary wheel; and a second steel rope connecting the second upper pulleys, the second lower pulleys and the rotary wheel, wherein one end of the second steel rope is fixed to the fixing frame beside one side of the second upper pulley set far away from the first upper pulley set, the second steel rope alternately connects the second lower pulleys and the second upper pulleys from the closest one of the second lower pulleys by using the end of the second steel rope as a beginning, and the other end of the second steel rope is connected to the second reel region of the rotary wheel.