Automatic wire tightener

The utility model discloses an automatic wire tightener, its characterized in that is including body fixing base, guide rail and guide rail assorted slide, the one end and the body fixing base of guide rail are connected, the other end of guide rail is provided with the fixed block, install guide pulley assembly no. 1 on the body fixing base, install guide pulley assembly no. 2 on the slide, the cover is equipped with the spring on the guide rail, just the spring sets up between slide and body fixing base. The utility model discloses a molybdenum filament elasticity reciprocates through the relative guide rail of slide and adjusts, when threading, shortens guide pulley assembly no. 1 and the interval of guide pulley assembly between two to through the locking of locking part, workman threading like this is more convenient for. 本实用新型公开了种自动紧丝器，其特征在于包括有本体固定座、导轨及与导轨相匹配的滑座，所述导轨的端与本体固定座连接，所述导轨的另端设置有固定块，所述本体固定座上安装有导轮总成，所述滑座上安装有导轮总成二，所述导轨上套设有弹簧，且所述弹簧设置在滑座与本体固定座之间。本实用新型的钼丝松紧度通过滑座相对导轨上下移动来调整，在穿丝时，缩短导轮总成和导轮总成二之间的间距，并通过锁