Multi-stage Block Platform Screen Door Mechanism
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Solution Overview
Problem
Conventional rope type platform screen door systems require significant volume and height, limiting operation efficiency and making them unsuitable for platforms with narrow installation space and low height.
Innovation Solution
A safety door system with smaller blocks and multi-stage blocks that overlap and separate, utilizing a lifting mechanism with a driving unit, rotors, and an interworking unit to minimize installation height and operation space, allowing ropes to open and close safety doors efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional rope type platform screen door systems use separate driving members for each block, then each block can be moved independently, but the system requires great volume and height, causing reduced operation efficiency
Solution Approach 1:
The patent combines multiple driving functions into a single driving member that can control multiple blocks simultaneously. The driving mechanism uses a centralized motor and transmission system that can move multiple blocks along the platform, eliminating the need for separate driving members at each block location. This merging of driving functions reduces the overall system volume while maintaining the ability to operate multiple blocks independently when needed.
2Strength
If blocks to which ropes are connected have increased size, then the lifting mechanism can support the load, but the lifting height and entire height of the lifting mechanism increase
Solution Approach 1:
The patent implements a nested block structure where multiple blocks are arranged in overlapping vertical positions. When the system is in the closed state, blocks are positioned at different heights along the platform, with upper blocks nested above lower blocks. This nesting arrangement allows the system to support the required load with smaller individual blocks while minimizing the vertical space occupied by the lifting mechanism, as blocks do not need to be stacked vertically in a single column.
3Reliability
If conventional rope type platform screen doors use traditional lifting mechanisms, then the system can operate reliably, but it cannot be installed at platforms having narrow installation space and low height
Solution Approach 1:
The patent divides the platform screen door system into multiple independent block units that can be controlled separately. Each block is a self-contained unit with its own positioning and lifting capabilities, allowing the system to be installed in modular fashion. This segmentation enables the system to adapt to narrow installation spaces by distributing blocks along the platform length rather than requiring concentrated vertical space, while maintaining reliable operation through independent control of each segment.
4Length of stationary object
If blocks are made smaller to reduce installation height, then operation space is minimized, but the lifting mechanism must be more precisely controlled to maintain stability
Solution Approach 1:
The patent incorporates feedback control mechanisms that monitor the position and status of each block in real-time. Sensors detect the location of blocks along the platform and provide feedback to the central control system, which adjusts the driving member's operation to maintain precise positioning. This feedback loop compensates for the reduced margin for error that comes with smaller block sizes, ensuring stable operation without requiring overly complex mechanical structures.
Data Source
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AI summary
The present invention provides safety equipment for a train platform, the safety equipment comprising: a plurality of multi-stage blocks (140) that can move up and down along a main body (110), ropes (200) being horizontally connected to one side of each multi-stage block; and an inducing member (150) that induces a block (130) to overlap with the multi-stage block (140) while being raised when moving up and to alternate with the multi-stage block (140) while being lowered when moving down. Accordingly, the ropes (200) for blocking passengers are sequentially moved upward to enable the passengers to enter or exit a train, and when the train departs, the ropes (200) are moved downward to effectively block passengers waiting on a platform.