How to use hanging clamps

Hanging clamps are tools used in a wide range of fields, including construction, civil engineering, steelwork, transportation, shipbuilding, heavy machinery, and machinery, etc. They are slinging tools that combine safety and ease of operation, and are also used as safety lifting equipment in many industries. On the other hand, mishandling may cause accidents, so make sure to review safe handling methods.

Uses of hanging clamps

By attaching a hanging clamp to the hook of a wrecker or crane, steel plates can be directly gripped and transported. When lifting heavy objects such as steel plates and concrete, it is sometimes necessary to wind a wire rope around the object to raise it, but this can cause it to wobble, which is dangerous. The use of a lifting clamp increases safety by engaging the teeth of the cam into the load to be lifted. The force of the cam can support 1.6 times the lifting load with a vertical hanging clamp and 1.0 times the load with a horizontal hanging clamp. Although it looks simple from the outside, it is a booster made by making full use of a wide range of knowledge.

Types of hanging clamps

There are three basic types of hanging clamps. They are vertical hanging clamps, horizontal hanging clamps, and universal type for hanging. Each is also divided into manual-locking and automatic-locking clamps. Vertical and horizontal hanging clamps used for slinging were developed by R Corporation in the United States in 1937. Import of these clamps was started in Japan in 1937, and domestic production began in 1962.

Vertical hanging clamp

These clamps are used to lift iron plates and other materials vertically. Capacities range from 0.5 to 10 tons, and there are sizes to suit each capacity.

縦吊クランプ

Horizontal hanging clamp

These clamps are used to lift steel plates and other materials horizontally. They are used for structural buildings such as steel frames and bridges. Capacity is 0.5 to 5 tons.

横吊クランプ

Screw type clamp

Screw tips and hemispherical cams allow for stronger clamping. They can be used for vertical hanging, horizontal hanging, and horizontal pulling. They are used for iron or steel materials, etc. Capacities range from 0.5 to 5 tons.

ねじ式クランプ

Clamps for concrete products

These clamps are used for concrete products, available in different types depending on the application. They can also be used for U-shaped ditches, manholes, etc.

コンクリート製品用クランプ

Hacker

It can be lifted horizontally by attaching it to four points on the flat iron plate. Hackers are available in various types and capacities from 1 to 5 tons.

ハッカー

Non-scratch clamp

These clamps enable lifting without damaging the structure. There are different types, including vertical hanging, horizontal hanging, and hackers with cams, etc.

無傷クランプ

How to use a hanging clamp

Select the appropriate hanging clamp for the work to be performed. Before using a clamp, carefully read and understand the instruction manual. Also, if you use multiple clamps, make sure to use the same type. Install the clamps securely and use them in such a way that they do not become unstable.

Precautions for use

Please note the following points when using hanging clamps.

  • Do not hang two or more pieces on top of each other or grab them sideways.
  • Be careful to avoid unbalanced loads, and do not hang long objects at one point.
  • The use of this product is not permitted unless you are legally qualified for slinging work. In addition, use other than slinging work is also prohibited.
  • Do not enter areas where suspended objects may fall or topple over.
  • Do not use it if the grip has a slope of 10 degrees or more, or if the grip is slippery.
  • Be careful that the temperature of the suspended load does not exceed 150°C or drop below -20°C.
  • Do not heat or modify the product.
  • Use with a backhoe or dragging is prohibited.
  • Inspect clamps before use, and do not use them if they are abnormal.

Summary

Hanging clamps can lead to accidents if used incorrectly or due to improper inspection. Understand how to use them correctly, check the precautions, and use them safely.