Sewing method for drogue parachute opening spring

Abstract

The invention discloses a sewing method for a drogue parachute opening spring, which relates to the field of parachutes. The method comprises the following steps of S1, first fixing a conical spring protective sleeve together with a conical tip of a conical spring; next, compressing a big end of the conical spring; compressing the conical spring to 3/5-4/5 of the length of the conical spring in a natural extending state; and then respectively tying and fixing two ends of diameters of the first circle to the third cycle of the big end of the spring by using two ends of a smooth nylon yarn rope; S2, folding the middle section of the smooth nylon yarn rope, exerting the folded end to penetrate through a central hole of a bottom enclosing cloth, and tying a fixture at the folded end so as to prevent the folded end from jumping into the conical spring protective sleeve; S3, integrally sewing the big end of the conical spring protective sleeve and the bottom enclosing cloth; and S4, untying the smooth nylon yarn rope from the folded end so that the conical spring is flipped. The sewing method for the drogue parachute opening spring, disclosed by the invention, is advantaged in that the difficulty in sewing the spring protective sleeve and the bottom enclosing cloth can be reduced, the sewing quality can be effectively ensured and the method can be conveniently and effectively operated by workers.

Description

technical field [0001] The invention relates to the field of parachutes, in particular to a sewing method for a guide parachute opening spring. Background technique [0002] The function of the guide umbrella is to pull the umbrella system out of the umbrella bag or the umbrella box, straighten the canopy cover of the main umbrella, and finally pull the canopy cover from the canopy, so that the main umbrella is in a good inflation state. The quality of the guide parachute has a great influence on whether the main parachute can work smoothly. [0003] There are many types of guide parachute, according to their structural characteristics, three types are often used at present: soft guide parachute with center rope, soft guide parachute without center rope and spring skeleton guide parachute. The spring skeleton type guide umbrella is that a spring is sewn on the umbrella. When the umbrella bag is opened, the elastic force of the spring will bounce the umbrella away from the u...

AI Technical Summary

Problems solved by technology

[0007] In view of the above defects or improvement needs of the prior art, the present invention provides a sewing method for guiding the parachute opening spring, the purpose of which is to make the parachute spring be in a certain compressed state before sewing, so as to prevent the conical spring from interfering The spring protective cover is sewn with the bottom cloth, and correspondingly, a space is reserved for the later seam reinforcing belt. According to the method of the present invention, the conical spring can be easily sewn into the spring protective cover. The spring protective cover and the spring should be completely fitted, and There will be no problem that the hem size of the bottom edge of the spring protective sleeve cannot be guaranteed, and the distance from the edge is out of tolerance

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