What are the key points for safe use of chain hoists?

What are the key points for safe use of chain hoists?

Outline
Overview and Applications of Chain Hoists
Pre-Use Inspection and Preparation
Correct Operation Methods
Precautions During Use
Precautions in Special Situations
Maintenance and Care
Training and Guidance
Common Problems and Solutions

I. Overview and Applications of Chain Hoists
Chain hoists are a common type of manual lifting device, widely used in construction sites, factories, warehouses, and for cargo handling. They offer advantages such as simple structure, ease of operation, and affordability, making them ideal for lifting heavy objects without power.

II. Pre-Use Inspection and Preparation
Check Equipment Condition: Before using a chain hoist, thoroughly inspect it to ensure that all parts are intact, especially the transmission and lifting chain. Ensure that they are properly lubricated and running smoothly. Check that safety devices, such as brakes, are functioning properly.
Understand the load capacity: Be familiar with the maximum load capacity of the chain hoist and ensure that the objects being lifted do not exceed the specified weight limit. Personal Protection: Operators should wear appropriate personal protective equipment, such as gloves and safety shoes, to prevent hand injuries or slips.

III. Correct Operation Method
Operational Sequence: The operator should stand in the same plane as the chain wheel and pull the hand chain. Rotating the hand chain clockwise will raise the load; pulling the hand chain in the opposite direction will slowly lower the load.
Avoid Overloading: Overloading a chain hoist is strictly prohibited, as it may cause equipment failure and accidents.
Maintaining Stability: During lifting, whether raising or lowering the load, apply even and gentle force when pulling the hand chain. Avoid excessive force that may cause the chain to jump or jam.
Pay Attention to the Environment: When using a chain hoist, always pay attention to the work area, ensure that there are no obstacles, and keep the hoist in a stable position.
Prohibit Angle Lifting: Lifting loads at an angle is strictly prohibited for safety reasons.

IV. Precautions During Use
Personnel Safety: When lifting, no one other than the operator should be near the load being lifted. It is strictly forbidden to perform any work or walk on or under heavy objects.
Secure Binding: When lifting objects, secure binding must be ensured, and the lifting gear and slings must be within the permissible load range.
Avoiding Operational Errors: It is strictly forbidden to retract the lower hook onto the lifting chain for lifting to prevent accidents. It is strictly forbidden to operate the chain hoist with any power other than human power.

V. Precautions for Special Situations
Humid Environments: When using in humid environments, pay special attention to electrical insulation to prevent leakage and electric shock.
High or Low Temperature Environments: When using in high or low temperature environments, consider the impact of temperature on equipment performance and take appropriate protective measures as necessary.
High-Rise Lifting Operations: When using a chain hoist for high-rise lifting operations, ensure it is securely fastened and avoid excessive twisting or stretching of the chain.

VI. Maintenance and Care
Daily Inspection: Perform a comprehensive inspection of the chain hoist regularly to ensure that all components are in good condition.
Lubrication and Maintenance: Regularly lubricate the transmission components and lifting chain of the chain hoist to maintain proper operation. Storage Environment: After use, the chain hoist should be cleaned and coated with anti-rust grease. Store it in a dry place to prevent moisture, rust, and corrosion.

VII. Training and Guidance
Professional Training: Only trained and instructed personnel should operate chain hoists. Ensure that all personnel understand the correct operating procedures and safety requirements.
Operator Qualifications: All personnel using chain hoists must obtain the appropriate operator qualifications.

VIII. Common Problems and Solutions
Excessive Hand Pull Force: If the hand pull force is greater than normal, stop using the hoist immediately and check whether the load is connected to other objects, whether the hoist parts are damaged, and whether the load exceeds the rated load.
Chain Jump or Chain Jam: If the chain jumps or jams during lifting, stop operation and check whether the chain is twisted or damaged.
Equipment Rust: If rust appears on the chain hoist, clean it immediately, apply anti-rust grease, and store it in a dry and ventilated environment.