1. Brief introduction of product:
Moveable ladder, also called ladder, landing step ladder, Zhanqiao step ladder, is used in automobile or train at Zhanqiao between factory fixed platform and the different height of tank top for safety walk. The step ladder is equipped with anti-skid plate grid step, steadfast, spring locking cylinder balance mechanism, hands and knees guardrail, foot inversion step and convenient for operator enter the Zhanqiao (station) on the top of tank car for loading and unloading operation. The main varieties are three step ladder, four stepand five step ladder ladder.

2. Characteristics of product:
1) ZQT type movable ladder is a new technology product developed by our company, the stack (platform) channel establishment and the design and manufacture of products between the bridge and the tanker. The principle is that the four connecting rod mechanism through a parallelogram, at the entire rotation movement for each step is parallel with the ground, the torque spring cylinder ladder by groups of built-in compression spring to balance. The main structure is composed of steps, handrails, cylinder spring balance system, locking mechanism, has the characteristics of novel structure, convenient operation, safe and reliable use etc.. The overall use of galvanized processing, beautiful appearance and anti-corrosion, durable; step adopts tooth mesh structure, good antiskid performance; a collision proof protection, avoid spark is generated; the first step can be turned on, in order to prevent the pinch.
2) Technical parameters:
①The height of the column：970mm

②The width of shape：960mm

③The width of steps：560mm

④Length of steps：800mm～1800mm

⑤Angle：-30°to 90°

3. Main function:
1) It has balance design, can hover at any height, angle and ensure the flexible operation;

2)Choosing the appropriate model can meet the safety requirements of different types of vehicles;.

3) step selection of antiskid grid plate, can always keep level at any height .

4)The buffer is installed between step and tanker contact position.

4. Drawing of product: