Lift Cabin With Manually Shiftable Frame for Scaffold Access
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Solution Overview
Problem
Existing construction and industrial elevators face challenges in safely and ergonomically bridging the gap between the elevator car and scaffolding platforms, particularly when the car needs to be rotated 90°, which can lead to unsafe working conditions and potential material loss.
Innovation Solution
The elevator car is designed with manually operated frame sections that allow for transverse movement relative to its direction of travel, enabling it to be shifted close to the scaffolding without the need for complex drive mechanisms, and includes a locking system to ensure safe and ergonomic loading and unloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elevator car is rotated 90° to bridge the gap between the car and scaffolding platform, then the gap can be bridged, but the working conditions become unsafe and ergonomically poor
Solution Approach 1:
The elevator car is made dynamically reconfigurable through telescopic frame sections that can extend horizontally to bridge the gap. The frame includes movable sections (30, 50) that can be extended outward using rollers (53-55) and guide rails (31-33), allowing the car to adapt its shape to reach the scaffolding platform safely while maintaining ergonomic loading conditions.
Solution Approach 2:
Instead of rotating the car 90° in the vertical plane, the invention extends the frame horizontally in the lateral dimension. The telescopic frame sections project outward perpendicular to the car's travel direction, creating a horizontal bridge to the scaffolding platform that maintains safe working conditions and proper ergonomics.
2Reliability
If a complex drive mechanism is used to move the elevator car transversely, then the car can be positioned close to scaffolding, but the device complexity increases
Solution Approach 1:
The telescopic frame sections are designed to be manually operable without complex automated drive mechanisms. Workers can directly manipulate the movable frame sections (30, 50) to extend or retract them, using simple mechanical advantage through rollers and guide rails, eliminating the need for sophisticated transverse drive systems while achieving accurate positioning.
Solution Approach 2:
The complex transverse drive mechanism is extracted and replaced by a passive telescopic structure. The frame sections (30, 50) can be extended and retracted independently of the main car drive system, using simple roller-based mechanics rather than complex integrated drive mechanisms, thereby reducing overall system complexity.
3Ease of operation
If the elevator car is moved horizontally using electrical adjustment devices, then the car can be positioned, but the risk of damage to limit switches increases
Solution Approach 1:
The frame sections are designed with inherent mechanical guides and self-aligning features that naturally prevent excessive movement or mispositioning. The guide rails (31-33) and rollers (53-55) provide passive mechanical constraints that protect limit switches from damage by preventing abnormal operating conditions, eliminating the need for complex electrical control systems.
Data Source
Figure 1a~1b
Figure 1C
Figure 2A~2B
AI summary
The invention relates to a car (10) for a lift, in particular a construction or industrial lift. This car can assume at least two end positions: a travel position as a first end position and an unloading position as a second end position. A change between the first and second end positions is achieved by shifting the car transversely to its direction of travel. A frame (11) is provided, comprising at least two frame parts (30, 50) that are movable relative to each other transversely to the direction of travel of the car within the lift and can be manually displaced. A first frame part (30) is fixedly connected to the car, and a second frame part (50) can be fixedly connected to the lift. Furthermore, a construction or industrial lift, in particular a rack and pinion lift, is provided, which has a car according to the invention.