This robust double scissor lift table is specifically designed for intensive use in three-shift operations and is used for palletizing tasks. Thanks to the greasable bearings, the high performance of the lift table is maintained even after many years of use.
Workplace optimization
Initial situation
We are at the end of a production process where bags weighing just under 20 kg each need to be stacked on industrial pallets. With a stacking height of about two meters, this involves considerable physical exertion and often results in unfavorable body posture.
Disadvantages for employees and employer
The high physical strain means that employees cannot maintain their performance throughout the entire workday. In the long term, this may lead to an increasing number of sick leave reports due to back problems, negatively impacting productivity and personnel costs.
The Solution
To increase efficiency and improve working conditions, we have installed a stationary lift table that is embedded in the floor. This work lift table allows the height of the pallet stack to be adjusted to the height of the individual employee, enabling an ergonomically favorable working posture. This preserves the back, and employees' performance remains higher for longer.
Process flow with our work lift table
In its initial position, the scissor lift table is at a comfortable working height for the employee and gradually lowers during the stacking process. Once the maximum stack height is reached, the platform is brought down to floor level to remove the pallet and introduce a new one. The double scissor lift table is then raised back to the starting position.
The operation of the lift table is manual or optionally through a sensor cycle control that detects the height of the pallet stack and automatically adjusts the lift table to the appropriate height.
Safety measures due to the installation situation
The double scissor lift table is installed in a pit specifically designed for this purpose. However, the pit is considerably deeper than the construction height of the lift table to allow for efficient stacking of the bags. When the platform is lowered, there is a risk that people could fall into the pit. To ensure safety, the lift table is therefore equipped with all-around guardrails. Additionally, a bellows ensures that access to the hazard area beneath the scissor lift platform is reliably blocked, preventing unintentional entry.
Technical details on drive and speed
The lift movement of the double scissor lift table is facilitated by four powerful hydraulic cylinders, driven by a 2.2 kW submersible pump unit. The unit delivers a flow rate of about six liters per minute, enabling a lifting speed of approximately 50 mm per second.
Compared to our standard version, the drive has two distinctive features:
- A 500-V electric motor instead of the usual 400 V.
- The use of biodegradable hydraulic oil instead of regular mineral oil.
Robustness and maintenance friendliness
The double scissor lift table is used behind an automated system in a three-shift operation. Given the high lifting cycles and continuous use, the use of greasable bearings is essential. This applies not only to the floating and fixed bearings but also to the scissor and connection bearings of the lift table.
Additionally, the lift table is equipped with an inspection opening in the platform. This allows easy access to the interior of the table even when it is fully retracted, significantly facilitating inspections and maintenance.
