Pulley device

The utility model provides a pulley device. The pulley device comprises a pulley arranged at the bottom of a barrier and a guide rail for the pulley to slide. The pulleys comprise the first pulley andthe second pulley, and the first pulley and the second pulley are arranged on the two sides of the bottom of the barrier respectively. The guide rails include a first guide rail for the first pulleyto slide and a second guide rail for the second pulley to slide, and the height of the first guide rail in the first pulley direction is higher than the height of the second guide rail in the second pulley direction. The device only needs to be installed at the bottom of a door and window barrier and can prevent the door and window barrier from toppling. 本实用新型提供一种滑轮装置，包括布置在屏障底部的滑轮和用于滑轮滑动的导轨。滑轮包括第一滑轮和第二滑轮，第一滑轮与第二滑轮分别设置在屏障底部两侧。导轨包括用于第一滑轮滑动的第一导轨和用于第二滑轮滑动的第二导轨，并且，第一导轨沿朝向第一滑轮方向的高度高于第二导轨沿朝向第二滑轮方向的高度。仅需安装在门窗等屏障底部且能够防止门窗等屏障倾倒。