The characteristic operation rules of the lever hoist need to be developed around three dimensions: safety core, standardized process, and environmental adaptation. Specifically, they can be refined into the following systematic norms:

1、 Core safety principles

Overload prohibition: Strictly follow the rated lifting capacity (including safety factor ≥ 1.2), and the actual load shall not exceed 80% -90% of the rated value. For example, a 1.5-ton rated hoist is only allowed to lift a load of 1.2-1.35 tons to avoid brake failure or structural fracture caused by overload.

Prohibition of diagonal/side pulling: Non vertical lifting or diagonal pulling is prohibited to prevent chain derailment, hook deflection, or torque imbalance. If non-linear work is required, models with 360 ° rotating hooks (such as Haklift VTS series) should be selected, and ensure that there are no obstacles within the rotation radius.

Personnel safety distance: During operation, personnel must not be located directly below, above, or within the rotation radius of the load; When heavy objects are suspended, it is necessary to fix the hand zipper/handle to prevent self-locking failure and falling.

2、 Standardize operational procedures

Pre operation inspection:

Visual inspection: The chain is not broken, corroded, or twisted; The brake is not stuck, and the dual brake claws+4 spring device responds sensitively; The anti loosening device of the hook is intact, and there is no excessive wear on the rotating hook; The shell has no cracks and the anti-corrosion coating is intact.

Functional testing: Check the smoothness of chain lifting and the braking effect of the brake during no-load operation; Electric hoists need to test the effectiveness of limit switches and emergency stop buttons; The interlocking degree of the ratchet mechanism needs to be verified for the hand-operated hoist.

Environmental confirmation: Clean up obstacles in the work area to ensure a flat ground; Check the stability of the power supply (electric hoist) or power source (manual hoist); Special environments (such as explosion-proof areas and high-temperature areas) require confirmation that the equipment meets ExIIBT4 or high-temperature resistance standards.

Standardization in operation:

Uniform force application: When operating the manual hoist, avoid sudden pulling or releasing too quickly to prevent impact loads; Electric hoists should avoid pressing the lifting buttons simultaneously to prevent motor overload.

Direction control: The direction of the hand zipper should be consistent with the meshing direction of the sprocket to prevent detachment; When rotating, it is necessary to rotate slowly to avoid load shaking caused by emergency stop and start.

Real time monitoring: Observe the load status, and if any tilting, shaking, or abnormal noise is found, immediately stop the machine for inspection; It is forbidden to adjust lifting points or chains during load movement.

Post operation maintenance:

Return and fixation: Cut off the power supply (electric hoist) and return the equipment to the designated safe position; Outdoor use requires a rain cover to prevent rainwater erosion.

Regular maintenance: lubricate transmission components (such as chains and gears) and replace lubricating oil every 2 months; Check the wear of the chain every six months (replace if it exceeds 5%); Conduct 25% rated load testing annually to verify the performance of brakes and limit switches.

Fault handling: When brake failure, chain breakage or other faults are found, immediately stop using and report for repair; It is prohibited to dismantle or modify safety devices (such as limit switches and brakes) without authorization.

3、 Environmental adaptation and special scenario rules

Industrial scenario: During equipment installation and welding alignment, it is necessary to ensure that the lifting points are stable to avoid load shedding due to vibration; Special lifting equipment is required for bundling loose parts to prevent slipping.

Architectural scene: The lifting of precast concrete components requires matching the rotation radius and component size to avoid collisions; High altitude operations require wearing safety belts and setting up safety nets.

Logistics scenario: When loading, unloading, and stacking at the dock, it is necessary to plan the operation path based on the shelf layout to avoid excessive rotation; Explosion proof scenarios require the use of explosion-proof hoists that comply with ExIIBT4 standards and regular testing of their explosion-proof performance.

Special environment: High temperature environment (-40 ℃ to 50 ℃) requires the use of high-temperature resistant lubricating oil; Stainless steel chains or anti-corrosion coatings are required for corrosive environments; Hand cranked hoists should be used in places without electricity, and backup power sources should be provided.

4、 Intelligence and Future Trends

With the development of technology, lever hoists are integrating intelligent functions such as RFID tracking, frequency conversion control, and remote monitoring. For example, TOYO intelligent manual hoist can transmit real-time load and location data through the Internet of Things to achieve remote fault diagnosis; The Haklift VTHA series supports variable frequency speed regulation to improve operational accuracy. In the future, lever hoists will develop towards high performance, intelligence, and environmental protection, such as using recycled materials and integrating energy recovery systems to further reduce energy consumption and carbon emissions.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment