A

　　At present, when using steel plate pliers, it must be standardized use to prevent heavy objects from falling, therefore, steel plate pliers by strong and wear-resistant, with high toughness, high strength of high-quality alloy steel plate, and overcome the problem of easy to wear height, new steel plate pliers with no load conditions, can also firmly lock the spring lock function, stability is effectively improved. How to effectively prevent accidental fall accidents caused by lifting objects?

　　If the steel clamp locking device is in the locked position and there is no error at the beginning of use, workers are prohibited from lifting the workpiece into the area where the steel plate falls or rotates, in order to avoid heavy weight, try to use more than two fixed devices, or some steel plates, the current modified steel clamp, because the steel plate lifting bracket is not fixed with steel plates. Now the steel plate lifting pliers, also known as lifting pliers, is divided into a variety of types of installation, the new design of steel plate lifting pliers is an essential tool, and in different fields, has also been better promoted and used.

　　Today in the practical application of steel plate lifters, especially in cold welding and welding of large steel plate parts, the use of universal plate lifting tools for production is greatly facilitated and can improve production efficiency, before unlocking the horizontal plate lifters, raise the lifting tongs to open the horizontal plate lifters, insert two hooks and move to the plate lifting device. Therefore, the work efficiency is high, and the flexibility of the wire rope is good, and the practicability is strong.

　　At present, the steel plate lifting pliers can flexibly adjust the distance between the jaws and the caliper body according to the actual lifting requirements, which can meet the requirements of clamping multiple steel plates at a time. The structure is simple and the cost is low. Therefore, the steel plate lifting pliers are pulled by the lifting wire rope at the position of easy wear on the lower surface, and the lifting pliers are firmly pressed on the lifting hook to carry out lifting operations.

A

　　At present, by understanding the composition and use principle of vertical crane crane tongs, the structure of lifting tongs and the conditions of domestic production and use, the design of lifting tongs of vertical crane has been completed, and an effective method to solve the sliding problem of steel plate lifting has been found, as well as a short-term vertical lifting device lifting tongs, and a new type of anti-fall device has been set up. So what practical problems should be paid attention to in the use of lifting tongs?

　　The lifting pliers now used relates to an anti-lock interlock bracket crane, which is characterized by the use of its reset spring in contact with the limit switch. The new lifting pliers body includes the structure of the main lifting pliers, the cavity structure of the main lifting pliers and the side main lifting pliers, the main structure, the lifting pliers can be rotatively connected to the rod used for lifting. And the rod has a lifting end extending to the main structure, and the lifting device is connected to a rotating pivot rod, so that the lifting pliers pivot rod is connected to the main structure.

　　Currently used in the improved lifting pliers, it connects the caliper body by a tension spring, so that when the lifting direction changes, the pliers can always be clamped to prevent the steel plate from accidentally falling off, and with higher stability, the new model is now conducive to expanding the use of steel plate clamping and lifting, effectively reducing material loss, extending the lifting pliers within the range of the fixed device. And lift the lifting tongs at a higher speed.

　　Therefore, the use of lifting pliers, so the effective release of labor, effectively improve productivity, the use of the existing steel plate application structure, as well as the crane lifting pliers control application is very important, for the main problems of the application program, as well as the design of the application technology structure, mainly to understand the order of crane operation, and understand the use of the brake control lifting mechanism.

A

　　1. The wire rope is broken

　　Wire rope breakage is a common situation in the failure of hanging pliers, which is usually caused by the use of wire rope for too long, rope body deformation, rope strand breakage and other reasons. The solution is to replace the wire rope in time to avoid such failures.

　　2. The hook is deformed

　　Use of the hook for a long time may cause the hook to deform, which may cause the hook to fall off easily, resulting in danger. The solution is to check the hook and replace it in time when deformation is found to ensure the integrity of the hook.

　　3. Lifting mechanism is damaged

　　The lifting mechanism of the lifting gear is composed of several components. If one of the components of the lifting gear is damaged, the overall performance of the lifting gear will be reduced. The solution is to maintain the lifting mechanism regularly and replace the problematic parts in time.

　　4. Pulley wear

　　Pulley is an important part of the lifting mechanism in the tongs, and its wear degree is related to the running time and the frequency of use of the tongs. When the pulley wear is serious, it will lead to increased wear of the wire rope and reduce the service life of the hoist. The solution is to check the pulley regularly to see if it needs to be replaced.