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One, steel Tuolian not ptosis reasons:

Steel towline is to the built-in cable, tubing, pipe, water pipes to traction and protective effect of. Due to the weight of the chain and the built-in cable, tubing, pipe, pipe weight determines the towline itself has a supporting length limit. Different types and materials of the towline, do not support the length limit is different. If you need to use steel Tuolian length exceeds this does not support the length limit will sag.

Two, solving measures:

1, the use of a guide groove

A guide groove is composed of five parts: the standard length of side guide wall, a guide groove connecting angle, the mounting screw, bottom groove, sliding device. The sliding device is divided into several kinds: nylon wheel, steel sliding plate, plastic sliding plate. The guide groove is correspondingly divided into three kinds: （ 1） with plastic sliding plate guide groove. （ 2） with a nylon wheel guide groove. （ 3） the strip sliding plate guide groove.

2, the use of supporting roller

（ 1） device can be fixed on the supporting wheel can be used directly without supporting frame supporting wheels, chain frame in the support wheel reciprocating operation.

（ 2 ） if the device cannot be fixed supporting wheel, can be used with a support frame supporting wheel, a supporting wheel is fixed on the supporting frame, power chain frame in supporting wheels run to and fro.