Adjustable Elevator Connection Bar with Break-off Thin Parts
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Solution Overview
Problem
Existing car door devices for elevators require custom-designed connection bars for each installation site, leading to inefficiencies and increased costs due to the need for site-specific design and fabrication.
Innovation Solution
A highly versatile connection bar design featuring a bar main body with thin parts that can be broken off at specific locations, allowing for adjustable length and easy on-site installation, while maintaining structural integrity through reinforcing bars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a connection bar is custom-designed and fabricated for each installation site, then the installation location can be precisely specified, but the manufacturing complexity and time increase significantly
Solution Approach 1:
The connection bar is divided into multiple segments with thin parts that can be broken off to adjust the effective length. This segmentation allows a single standardized connection bar to be adapted to various installation locations by breaking off unnecessary segments, eliminating the need for custom design while maintaining installation flexibility.
Solution Approach 2:
The connection bar incorporates thin parts at specific locations that change the structural parameter (breakability) at those points. This allows the same connection bar to be configured for different lengths by breaking at different thin parts, providing adaptability without increasing design complexity.
2Manufacturing precision
If a connection bar is custom-fabricated for each site, then the length can be precisely specified, but the manufacturing time and cost increase
Solution Approach 1:
The thin parts are pre-formed during mass production of the connection bar, preparing predetermined break points in advance. This preliminary action eliminates the need for custom fabrication at each site, allowing quick on-site adjustment by simply breaking at the pre-prepared thin parts, thus maintaining precision while improving productivity.
3Strength
If the connection bar is made entirely of rigid material, then the structural strength is high, but the installation flexibility and adjustability decrease
Solution Approach 1:
The connection bar has different local qualities: most of the bar maintains high strength with uniform thickness, while specific thin parts have reduced thickness to enable breaking. This local quality differentiation allows the bar to be strong where needed and breakable where adjustment is required, balancing strength and adaptability.
4Measurement precision
If site investigation is performed to specify the connection bar length, then the correct length can be determined, but the time and complexity of the installation process increase
Solution Approach 1:
The connection bar design with multiple thin parts allows installers to self-determine the required length by visually identifying and breaking at the appropriate thin part without needing detailed site investigation or complex calculations. The thin parts serve as self-indicating markers that guide the installer to the correct break point.
Data Source
AI summary
The object of the present invention is to provide a highly versatile connection bar of an engaging body which can be installed in various locations in a car door device for an elevator, and an elevator. A connection bar includes a bar main body; and, a bar material is used as the bar main body, where the bar material includes, in at least one location in the longitudinal direction, a thin part formed along a direction crossing the longitudinal direction, so that a portion of the bar material can be broken off. If necessary, an unnecessary part of the bar material can be broken off at the thin part, so that the length of the bar main body can be changed. Since the break-off work can be carried out on-site, the length of the bar main body can be adjusted on-site.