The climber climbs under the protection given by the protection person through the climbing rope. One end of the climbing rope is connected with an iron lock or a belt directly connected to the climber's waist, and the other end passes through the iron lock and the descender connected with the belt on the protector's waist, and passes through one or more fixed security in the middle. Iron lock on the fulcrum. The protector keeps giving the rope (or the rope) as the climber rises. When the climber misses, tighten the rope to stop the fall. When a sudden fall occurs, the impact force is very large. It is difficult to hold the rope directly. The impact force is mainly offset by the friction force of the rope and the iron lock and the descender. Because there is a lot of friction on the protection fulcrum, people with less weight can protect those with heavier weight. The form of protection is generally divided into the following two types according to the relative position of the protection fulcrum:
Above protection:
Protect the protection of the fulcrum above the climber. As the climber ascends, the protector continues to collect the rope so that the climber does not leave any rope on his chest, but he must not pull too tightly so as not to affect the climber's actions. This should be especially noticed when he climbs up the elevation. There is no special requirement for the climber to protect the climber. It is safer to have a smaller impact when he crashes. When using the lower protection, the equipment used generally has seat belts, iron locks and descenders. When the protector collects the rope, he should pay attention to holding a rope behind the descender at any time (or grasping the ropes on both ends of the descender), and it is difficult to stop falling only by grasping the rope in front of the descender.
Below protection:
The protective fulcrum is located below the climber. There is no above-mentioned preset protection point. Only during the ascendant's ascension, the guard rope is continuously put into the iron lock on the way to the security fulcrum. This is the only feasible protection method for leading climbers. It is practical and it is a protection method prescribed in international competitions. However, this method of protection requires the climber to hunt and protect himself, and in the event of a fall, it has a large fall distance and strong impact and is therefore generally used by skilled persons.
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