Folding stairs, also known as foldable stairways, foldable staircases, or retractable stairs, are specifically designed to offer a safe and efficient way of accessing loading platforms and road or rail tankers.
The design principle of folding stairs involves a four-bar mechanism that forms a parallelogram shape, ensuring that each step remains parallel to the ground as the stairs rotate. This design allows the operator to maintain an upright position while walking on the stairs.
To maintain balance, a spring cylinder system with multiple sets of built-in springs is used to counteract overturning moments, reducing the effort required for folding and unfolding the stairs. The components of folding stairs include the steps, handrails, spring cylinder balance system, and locking mechanism, providing a novel structure, easy operation (possible by a single person), and reliable and safe performance.
The body of the folding stairs is galvanized for a visually appealing appearance, corrosion resistance, and long-lasting durability. The steps are made of dentiform grid plates with excellent non-slip properties, while the contact area features oil-resistant rubber to prevent sparks from collisions.
