Vertical lifting clamps

Vertical lifting clamps for mechanically securing metal sheets are a common device for lifting loads. They are used in metal structure manufacturing, warehouses, metal storage facilities, and service stations. Vertical stacking helps save floor space.

The clamps are used for quickly lifting and moving flat items, including beams and channels. The design of a plate clamp includes a lock that ensures safe transport of the load regardless of its thickness and weight. Operation is permitted with either a single clamp or in pairs.

Design

Vertical lifting clamps consist of 3 elements:

• • A bracket for securing the load;
• • A lever;
• • A pin.

The body of the device is made of sheet metal and reinforced with a durable plate that improves performance characteristics. Welding is performed in a protective gas environment.

The lever is the element used to attach the clamp to the load and lock it in the required position. Operating features may vary between manufacturers, but in general, the load may only be transported when the lever is in the closed position.

The support plate is made of hardened alloy steel, providing a high level of strength. The plate is fitted with teeth that increase grip reliability and contact strength on the sheet. It is also fitted with an eye for use with a hook.

Types of clamps

Industry produces several types of clamps depending on operating conditions:

1. Scissor-type. Consist of 2 levers of different sizes connected by a hinge mechanism. One end is attached to the link, the other is fitted with jaws to secure the load.
2. Screw-type. Sheets of metal are secured by mechanically tightening clamps with screws. Attachment to the load is done with screws. This type of vertical clamp prevents damage to thin sheets.
3. Friction-type — a variation of scissor-type vertical clamps. The design is fitted with sliding plates moved by a wedge mechanism.
4. Eccentric clamps for sheet metal (also known as “bulldogs”). The design includes a lever positioned perpendicular to the axis of the lifted load.

How to choose?

A vertical plate clamp is selected based on the characteristics of the load: weight, dimensions and thickness. A swivel clamp can be installed if needed. During operation, the load specified by the rigging equipment manufacturer must not be exceeded, in order to avoid injury. It is recommended to select a clamp with a 10-15% margin above the load weight.