Elevator Car Sling Upper Beam Segmentation for Trap Door Clearance
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Solution Overview
Problem
Conventional elevator car sling upper beam systems often interfere with trap doors and refuge spaces, particularly in elevators with small car depths, preventing the trap door from opening and limiting the refuge space volume.
Innovation Solution
A car sling with a modified upper beam system featuring a continuous C-profile beam on one side and two short C-profile beams on the opposing side, replacing the traditional continuous upper beam to create additional space for trap doors and refuge spaces, while maintaining structural stability through interconnection parts and car top connection elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a continuous upper beam is used to provide structural strength, then the structural strength is improved, but the trap door cannot open or the refuge space is limited
Solution Approach 1:
The continuous upper beam is divided into two separate beams positioned on opposite sides of the car roof. This segmentation creates an open space in the middle that allows the trap door to open freely while each beam maintains the necessary structural strength. The beams are positioned at the lateral edges of the car roof, providing support without obstructing the trap door area.
2Stability of the object's composition
If a continuous upper beam is used to support the car, then the car support stability is improved, but the refuge space volume is reduced
Solution Approach 1:
The upper beam structure is segmented into two separate beams positioned laterally on opposite sides of the car roof. This creates an open central space that increases the refuge volume available on the car roof. The beams are positioned to provide structural support at the edges while leaving the central area clear for refuge space.
Solution Approach 2:
The structural support function is moved from a continuous beam spanning the entire width to two discrete beams positioned at the lateral edges. This dimensional repositioning allows the support function to be achieved at the boundaries while the interior space remains open and available for refuge purposes.
3Length of moving object
If the car depth is reduced to accommodate small shafts, then the shaft space is optimized, but the trap door and refuge space are interfered with
Solution Approach 1:
The upper beam is segmented into two separate beams positioned at the lateral edges of the car roof. This segmentation allows the trap door to be positioned in the open central space between the beams, enabling trap door functionality even in cars with reduced depth where a continuous beam would otherwise obstruct the opening.
4Stability of the object's composition
If two continuous upper beams are used to fix the car sling, then the structural stability is improved, but the device complexity increases
Solution Approach 1:
The upper beam system is segmented into two separate beams positioned on opposite sides of the car roof. Each beam is independently positioned and secured to the car roof structure, simplifying the overall system by eliminating the need for complex interconnections required by a single continuous beam while maintaining structural stability through the distributed support configuration.
Data Source
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AI summary
A car sling for an elevator car, comprising at least two, preferably at least four uprights and an upper beam system, wherein the upper beam system comprises at least one continuous upper beam - preferably with a C-profile - on the side of the elevator car facing away from a trap door and/or a refuge space and two short upper beams on the side of the elevator car facing the trap door and/or the refuge space, and in that each short upper beam is connected with the continuous upper beam by means of an interconnection part.