The safety of transportation of goods in the car body or on the roof directly depends on the quality and correctness of the use of rigging equipment. Drivers often underestimate the inertia forces that occur when braking or maneuvering sharply, relying on the sides and weight of the cargo itself. However, even a small displacement of a heavy object can cause a serious accident. Exactly. stretcher It is the tool that transforms chaoticly abandoned things into a monolithic structure that is not subject to shaking.
The modern market offers many tooling options, from simple rubber harnesses to professional systems with snoring locks. Understanding the difference between the two is critical for any vehicle owner who is regularly involved in transportation. An improperly selected or worn mounting element can burst at the most inopportune moment, releasing dangerous cargo. In this article, we will analyze in detail the device of tension mechanisms, learn to calculate the load and avoid fatal errors during fixation.
The device and principle of operation of the snoring mechanism
The basis of any high-quality screed belt is a ratchet mechanism, or, as it is often called, a rattle. This node allows you to create and hold significant tape tension using a lever of force. Inside the body is hidden a system of gears and fixtures, which blocks the reverse movement of the shaft, preventing the load from loosening its grip. Quality ratchet It should work smoothly, without jamming and backlashes, ensuring a uniform distribution of pressure along the entire length of the belt.
The material of the manufacture of the mechanism plays a key role in its durability. Cheap models are often made of silimin or plastic, which may not withstand a sharp jerk or extreme load. Professional tie-belt They are equipped with steel or zinc mechanisms that have undergone galvanic treatment to protect against corrosion. It is the metal body that ensures that the mechanism does not crack at maximum tension, which can reach several hundred kilograms.
⚠️ Attention: Never use a snoring mechanism with visible cracks or deformities of teeth. A damaged rattle can spontaneously unlock in motion, which will lead to an instantaneous weakening of the cargo fixation.
The principle of operation is based on increasing the force of the application of the driver's hands. Raising and lowering the lever, you wind the tape on the roller, gradually choosing a slack. For unlocking, a special lever-finding is usually provided, which removes the lock from the engagement, allowing you to freely pull the tape.
Why is the ratchet clicking?
When the mechanism is working, a characteristic crackle is heard. This is the sound of a metal fixator (dog) that hits the gear teeth, preventing the gear from spinning back. The volume of clicks depends on the material and the quality of the processing of parts.
Classification of belts and types of anchorages
The tape is a load-bearing element of the entire system, and its characteristics determine the maximum weight that can be reliably fixed. The most common polyester tapes, which are practically not stretched under load, unlike nylon analogues. Lack of elasticity is a key advantage, as the load remains rigidly fixed even at long distances. Standard bandwidth ranges from 25 mm for light loads to 50 mm or more for heavy items.
The design of the ends of the belt also affects the scope of application. There are several main types of endings:
- 🔗 Hooks: are of various forms (G-shaped, S-shaped, with grip), designed to hook for standard hinges in the body or frame.
- 🔄 Rings: allow you to connect two belts into one long or create a closed loop for the girth of the load.
- 🪝 Claw-locked hooks: have sharp elements for reliable fixation behind wooden sides or uneven surfaces, preventing slippage.
When choosing, you should pay attention to Workload (WLL)This is always indicated on the tag or belt. This value is 2-2.5 times less than the burst load, which provides the necessary margin of safety. The use of a belt with an inappropriate type of fastening can lead to damage to the body of the car or the cargo itself, so the selection of fittings should be conscious.
Load calculation and selection of suitable model
Choosing the right belt begins with an assessment of the weight and dimensions of the cargo. Many drivers make the mistake of buying snapping "by eye", which often leads to the use of too weak or, conversely, too powerful and cumbersome solutions. Load capacity This is the main parameter that cannot be ignored. If you plan to carry a motorcycle weighing 200 kg, belts with a working load of 250 kg will not be enough, since during braking the inertia force increases many times.
For convenience of choice, you can focus on the following table of correspondence of the width of the tape and the permissible load:
| Ribbon width (mm) | Workload (kg) | Breaking load (kg) | Typical application |
|---|---|---|---|
| 25 | 250 - 400 | 750 - 1200 | Roof luggage, building materials, furniture |
| 35 | 600 - 800 | 1800 - 2400 | Motor vehicles, snowmobiles, heavy boxes |
| 50 | 1000 - 1500 | 3000 - 4500 | Cars, large-sized equipment |
| 75+ | 2500+ | 7500+ | Special equipment, industrial cargoes |
The length of the belt must also be taken into account. Too short. wicker-belt will not allow you to correctly position the mechanism (usually it is put in the middle or side, but not on the load), and too long will be confused and create extra sail. It is optimal to have a set of belts of different lengths to combine them depending on the task. Always leave a margin of length for a comfortable grip with your hand when stretching.
When transporting bulk or light, but bulky cargo, use a grid over the main mount. This will prevent small objects from falling out, even if the main belt is weakened by a millimeter.
Instructions for safe locking of cargo
The correct mounting technique is a guarantee that the cargo will reach the whole, and the car body will not get damaged. The process begins with an inspection of the mounting points on the car. The hinges in the floor of the body shall be clean and welded securely. If you use the sides of the trailer, make sure that they will withstand the pulling force and do not deform. Before starting work, spread the belts so that they do not twist.
☑️ Pre-fixing check
The tension must be carried out evenly. Do not pull the lever with all your might - quite confident, rhythmic movements until the belt is stretched, and the load does not cease to move during the push. Excessive force can damage both the load and the belt or body. The rattling mechanism should be positioned so that it does not touch the sharp corners of the load and does not beat against the side when moving on irregularities.
After fixing, be sure to check the reliability of the locks. Hooks should sit tight, without gaps. If the bandage method is used (when the belt covers the load entirely), make sure that the tape does not touch the sharp edges. In such cases, it is necessary to use corners Or put a dense cloth in to prevent the fibers from being rubbed during vibration.
⚠️ Attention: It is strictly forbidden to tie knots on polyester tape for elongation or connection. The assembly reduces the strength of the belt by up to 50% and can become a break point under load.
Common Mistakes and How to Avoid Them
One of the most common mistakes is to fasten the load to only one point. This creates a dangerous lever: when braking, the upper part of the load can move forward, even if the bottom is securely fixed. Always use at least two support points, placing the belts cross-cross or parallel on different sides. This stabilizes the object in all planes.
Another common problem is the use of damaged equipment. Cloths, nodes, sewn places or melted areas are an unambiguous signal to the disposal of the belt. Polyester fiber sensitive to ultraviolet light and chemicals. If the belt was in the sun for a long time or was stained with acid, its structure may weaken from the inside, although it looks normal.
Drivers often ignore the re-boot. After the first 10-20 kilometers of the path, especially on rough roads, you need to stop and check the tension. The load can "sit down", and the belt - a little stretch. Timely correction will prevent further weakening and possible emergency situation on the way.
The main rule of safety: one serviceable belt is better than two doubtful, but the correct location of the fastening points is more important than the number of belts.
Care, storage and service life
So load-string He has been in service for a long time and needs to be taken care of properly. After each trip, especially in dirty weather, the belts should be cleaned of dust and moisture. The dirt that is stuffed between the fibers works like an abrasive, rubbing the threads from the inside with each movement. Dry belts need to be spread out, away from heating devices and open fire.
Storage is carried out in a dry, ventilated room. It is not recommended to store the belts in crumpled condition or under heavy objects, as this can lead to crevices and damage to the internal structure of the tape. The metal parts of the mechanism should be lubricated periodically with light engine oil or WD-40 to prevent the movable elements from acidifying.
The service life depends on the intensity of operation. With regular use in harsh conditions, the belt may require replacement after a year or two. If you notice that the tape began to "crack", there were transverse breaks of threads or the mechanism began to slip under load - immediately replace the tooling. Saving on security is unacceptable here.
Can I wash my belts in the washing machine?
Technically, polyester tape can be washed, but doing so in a washing machine is not recommended. Aggressive powders can destroy the protective impregnation of fibers, and the metal mechanism will damage the machine drum or rust. It is better to wash the tape manually with warm water with soft soap and dry thoroughly.
What to do if you jammed the snoring mechanism?
If the lever does not move, do not make excessive efforts. First, try to clean the mechanism of dirt with compressed air. If the cause is rust, use penetrating lubricant. In case of mechanical damage to the gear teeth, it is easier to replace the entire mechanism or buy a new belt, since repairs may not be safe.
What is the difference between workload and tear load?
Workload (WLL) is the weight that a belt can hold safely in dynamics. Breakage load is the limit at which material is physically destroyed. Usually the breaking load is 2-2.5 times higher than the working load. You should always focus on the lower value (working).