Elastic safety pull rope with maximum tensile range limitation functions

Abstract

An elastic pull rope with maximum tensile range limitation functions has a soft elastic pipe casing forming a closed threading space inside the pipe body. The side edges of the pipe casing are provided with evenly distributed convex and concave folding edges. Elastic strips, made of multiple elastic cords, go straight through the long threading space. Pulling joint parts are configured on the elastic strips, and each part matches the corresponding position of the concave folding edges of the pipe casing. A plurality of pulling woven cords are formed on the inner side of the concave folding edges, so as to bind and fix the pulling joint parts on the elastic strips with the concave folding edges. Two flat-type binding strips are formed on the two ends of the pipe casing and the elastic strips. Extending strips are formed respectively by extending the ends of the two flat-type binding strips.

I claim: 
     
         1 . An elastic pull rope with maximum tensile range limitation functions, comprising:
 a soft elastic pipe casing, in the style of a webbing pipe body woven from yarns, forming a closed long threading space inside the pipe body; the two relative side edges of the soft elastic pipe casing are provided with as plurality of regular, continuous, wavy and evenly distributed convex folding edges and concave folding edges;   elastic strips, made of multiple elastic cords distributed side by side; the elastic strips go straight through the long threading space of the soft elastic pipe casing;   multiple pulling joint parts, configured on the elastic strips with evenly spaced distribution, and each pulling joint part matches the corresponding position of the concave folding edges of the soft elastic pipe casing;   a plurality of pulling woven cords, formed on the inner side of the concave folding edges of the soft elastic pipe casing, so as to bind and fix the pulling joint parts on the elastic strips with the concave folding edges;   two flat-type binding strips, respectively formed on the two ends of the soft elastic pipe casing and the elastic strips; said flat-type binding strips are made by clamping the elastic strips with the two sides of the soft elastic pipe casing;   two extending strips, formed respectively by extending the ends of the two flat-type binding strips;   based on this, when the two flat-type binding strips are pulled, drawing the elastic strips and soft elastic pipe casing to elongate, the sectional traction between each pulling woven cords can generate regular and even wavy folds on each convex folding edge and concave folding edge of the soft elastic pipe casing; meanwhile, when the soft elastic pipe casing is pulled to the straight state and cannot be pulled any more, it will limit the maximum tensile range of the elastic strips.   
     
     
         2 . The structure defined in  claim 1 , wherein, on the terminal end positions of the two extending strips, connecting parts are configured; said connecting parts are any of the forms of clasp, clamp, fixture, and handle. 
     
     
         3 . The structure defined in  claim 1 , wherein said soft elastic pipe casing is of one section or multiple sections; in the case of multiple sections, each section of the soft elastic pipe casing is linked up through connecting strips without elasticity.