Height-Adjustable Platform Staircase with Low-Effort Cable-Pulley Lifting
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Solution Overview
Problem
Existing height-adjustable platform staircases require significant manual effort for operation, limit access to the platform only at the lowest position for safety reasons, and are prone to malfunctions or instability, especially when used with tools or materials.
Innovation Solution
A platform staircase design featuring a platform, articulated staircase, and a lifting mechanism with a tension element and deflection element, allowing horizontal alignment of steps and platform during height adjustment, and equipped with casters and telescopic pulleys for mobility and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a manually operated height-adjustable platform staircase is designed with a solid construction to ensure stability, then stability is improved, but the manual effort required to operate it increases significantly
Solution Approach 1:
A tension element (cable or chain) acts as an intermediary between the platform and the staircase structure. This intermediary transmits force efficiently, allowing the operator to lift the heavy platform with reduced effort while the solid construction maintains stability during operation
Solution Approach 2:
The system transitions from a static solid structure to a dynamic system where the tension element can be actively engaged and disengaged. During lifting, the tension element becomes taut and carries the load; during lowering, it can be relaxed, allowing controlled descent with minimal effort
2Reliability
If access to the platform is restricted to the lowest position only, then safety is improved, but productivity decreases due to time-consuming descent required to exit or add tools
Solution Approach 1:
The staircase is designed to be dynamically adjustable in height relative to the platform. It can be extended upward along the platform's side, creating stable access points at multiple heights. This dynamic configuration allows workers to safely enter and exit at any platform height without requiring full descent
Solution Approach 2:
The staircase is divided into multiple segments or steps that can be independently positioned along the platform's vertical side. This segmentation allows the staircase to reach any height on the platform, providing multiple access points while maintaining structural integrity through the segmented design
3Ease of operation
If a height-adjustable ladder is used to provide access at any height, then accessibility is improved, but reliability decreases due to jamming and malfunction risks
Solution Approach 1:
Guiding elements act as intermediaries between the staircase segments and the platform structure. These elements guide the staircase segments along predetermined paths, preventing lateral movement, binding, or jamming while allowing smooth vertical adjustment for access at any height
Solution Approach 2:
The staircase employs a dynamic guiding mechanism that allows controlled movement at any height while maintaining stability. The guiding elements enable the staircase to adapt its position dynamically without risking malfunction, unlike rigid ladder structures that are prone to jamming
4Adaptability or versatility
If the platform and staircase are designed for quick deployment anywhere, then mobility is improved, but ensuring stability and safety during operation becomes more difficult
Solution Approach 1:
The system employs dynamic stabilization where the tension element and guiding elements work together to maintain stability during both mobile and stationary phases. During deployment, the structure transitions smoothly from mobile to stable through controlled engagement of the tensioning and guiding mechanisms
Solution Approach 2:
The tension element and guiding elements serve as intermediaries that connect the mobile platform structure to the ground or support surfaces. These intermediaries provide anchoring and guidance that ensure operational stability even when the system is deployed in various locations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy, safe, and quick access to the platform at any height, reducing manual effort and preventing tipping or jamming, while maintaining horizontal alignment of steps and platform.
Implementation Method 1
a tension element, in particular a cable pull (11), which is connected to the platform (3) or to an upper part of the lifting mechanism (9)
Implementation Method 2
The tension element (11), in particular the cable pull, is deflected by a deflection element, in particular a deflection pulley (15)
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The present invention relates to a height-adjustable platform staircase (1) comprising a platform (3) and a staircase (5) pivotally attached to the platform, a base frame (7), and a lifting mechanism (9), in particular comprising two parts, for adjusting the height of the staircase (5). The staircase is connected to the platform (3) or an upper part of the lifting mechanism (9) via a pulley element (11), in particular a cable pulley. The direction of pull of the pulley element (11), in particular the cable pulley, is deflected via a deflection element (15), in particular a pulley, mounted on the base frame (7) or on a lower part of the lifting mechanism (9).