When performing lifting operations, insurance of the serviced object is the most important organizational condition. The cargo is fixed using ropes, belts, rafter systems, etc. But from the very beginning it is practically impossible to make optimal fastening with sufficient clamping force. Therefore, to adjust this parameter use a special device - lanyard. What is this in terms of operation? This is the regulating mechanism by which the cable is tightened. At the same time, there are different models of lanyards with a wider functionality.
Device device
In the simplest versions, the lanyard resembles a small coupling. This is partly true - the central part of the structure is represented in some way by a cylindrical body with two holes at the ends. Moreover, the open lanyard for the cable provides that the inner part of the coupling will be free. This design can provide both plus and minus. The disadvantage of open systems is that they can become clogged with dirt and random blocking objects.
Threaded functional rods are introduced at both ends of the central coupling. Both elements at one end have only thread for insertion into the coupling, and at the other end there are fastening accessories, thanks to which the lanyard itself is installed. What is this in terms of mounting mechanism? The reverse ends of the rods make it possible to organize fasteners in different ways, which are worth considering separately.
Varieties
Mounting, adjusting and gripping methods are the main feature of the classification of this device. There are three types of mounting devices that the lanyard is equipped with. GOST, in particular, highlights the “plug”, “ring” and “hook”. Each lanyard has two latches in the design, which do not have to be the same. There are hook-to-hook, fork-to-ring, fork-to-hook configurations, etc.
Each locking system gives its own operational effect. The presence of a ring indicates the ability to adjust the cable tension - accordingly, it can be pulled from two sides. The hook makes the insurance system mobile - it can be easily unhooked and picked up, thereby changing the serving slings, for example. Conversely, the ring-ring lanyard focuses on long-term transportation with a fastening mechanism in which only the degree of tension can be changed. As for the fork, it is designed to maintain power load without a mobile hook and quickly adjust the tension.
Specifications
Turnbuckles are made of steel alloys. The most durable and durable products are obtained as a result of galvanizing - they are resistant to corrosion processes and at the same time have sufficient physical strength. As a rule, galvanized lanyard is used in conditions of open operation, when goods are loaded in ports, on remote storage areas, etc.
In terms of size, a key characteristic is the diameter of the thread. It can be 12-25 mm on average. The larger it is, the tighter the lanyard. Dimensions in length have a wider range - from short models of 20 cm to 90-centimeter structures that are used for transportation of bulky goods. In terms of load capacity, a medium-sized lanyard is able to cope with 500 kg - of course, when it comes to the group use of several elements from different sides of the grip.
Operation tips
Only integral products without deformation, which correspond to the planned loads, are allowed to organize the fastening mechanism. After fixing the mechanism, it is important to make sure that it does not have a third-party effect - for example, the so-called side loads. If a ring-ring lanyard is used, then the reliability of the device must be supported by lock nuts. Also, regardless of the type of fixture, it should be treated with gasoline and a felt wheel before being introduced into the loading and safety operations scheme. This will ensure stability of the mechanism during tensioning.
In what areas is the device used?
The device is universal, therefore the range of directions of use is limited only by technical requirements in specific loading cases. It is only important to note that lifting and transporting goods are not the only events in which the lanyard is involved. What is this in terms of functional effect? This is not just a regulatory mechanism, but also a full-fledged fixture. Therefore, it is successfully used in the installation of tents, hanging curtains, with temporary installation and insurance of vertically installed blocks and columns. A wide range of lanyard configurations allows you to use them in the organization of multi-level safety systems, which also use cranes, beams, winch mechanisms, etc.
Manufacturers and prices
Turnbuckles are produced by both foreign manufacturers of tools and lifting equipment, and domestic companies. This is exactly the case when a Russian manufacturer in the equipment segment can well compete with foreign brands. Among such enterprises, one can mention Zubr, Sorokin, KREP-KOMP, etc. In particular, Sorokin offers a fork lanyard, the dimensions of which are 100x50x50 and weighs 200 g. Such a product costs 3 thousand rubles. By the way, devices of small sizes are estimated at 200-300 rubles. However, the cost of production may be affected by the material of manufacture - the most expensive models are made of galvanized steel of the din 1480 brand.
Conclusion
Despite its simple design, the lanyard remains a sought-after tool even in the arsenals of high-tech logistics companies. This is due to various factors. Firstly, such devices are easily installed, adjusted and removed. It is not difficult for an experienced group of movers to service a large-sized facility with a set of high-quality clamps of this type. Secondly, one can note the high mechanical reliability of the lanyard. What is this in practice? This is the ability to cope with destructive loads of the order of 3-5 tons or more - depending on the specific model. Of course, this does not mean that the product is completely free from flaws. For example, due to the structural simplicity, the lanyard retainer practically does not provide opportunities for additional insurance. The introduction of third-party support tools, as a rule, only complicates the system and makes it less reliable. For this reason, all responsibility for the quality of the operation rests with the personnel servicing the fastening system. The slightest mistake in the organization of the fastening device can lead to tragedy, so it is important to follow the rules for handling lanyards.