Cantilevered Platform Screen Gate with Roller Support
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Solution Overview
Problem
Platform screen gate systems often require complex designs with multiple moving parts, leading to high manufacturing costs and installation challenges, particularly when restricting access to existing platforms without excavation.
Innovation Solution
A platform screen gate system with a tower having an upper and lower portion, where the gate is cantilevered from rollers and supported by a pulley system with a motor in the lower portion for adjusting belt tension, allowing the gate to move between open and closed positions while minimizing height and installation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex gate system with multiple moving parts is used, then the gate can effectively block access, but the manufacturing cost and device complexity increase
Solution Approach 1:
The gate system is divided into separate functional components: a gate panel for blocking access, a roller mechanism for support and movement, a belt for actuation, and a motor for power. This segmentation allows each component to be optimized independently while reducing overall complexity compared to integrated multi-part systems.
Solution Approach 2:
The operator (motor) is extracted and positioned in the lower portion of the tower, separate from the gate panel. This extraction simplifies the gate structure by removing moving parts from the panel itself, reducing the number of moving parts while maintaining effective access blocking.
2Loss of time
If the gate is installed on existing platforms without excavation, then installation time and cost are reduced, but the gate height and structural complexity must be minimized
Solution Approach 1:
The gate system transitions from traditional floor-level installation to vertical tower-mounted installation. By moving the gate to an elevated position supported by rollers on the tower, the system eliminates the need for platform excavation while reducing structural complexity through the compact tower design.
Solution Approach 2:
The gate is designed with dynamic support through rollers that allow smooth movement between open and closed positions. This dynamic roller support system replaces complex fixed structural arrangements, reducing overall structural complexity while enabling easy installation on existing platforms.
3Ease of repair
If the motor is positioned in the lower portion of the tower, then access to the motor is improved for maintenance, but the belt tension control complexity increases
Solution Approach 1:
A belt acts as an intermediary element connecting the motor in the lower tower portion to the gate panel. The belt transmits power while allowing independent positioning of the motor for maintenance access. Belt tension is controlled through the motor's position on the slide track, simplifying tension control without compromising accessibility.
Solution Approach 2:
The motor is mounted on a slide track, making it dynamically positionable along the track. This dynamic positioning allows the motor to be moved to optimal locations for both belt tension control and maintenance accessibility, reducing the need for complex fixed tensioning mechanisms.
4Shape
If the gate is elevated above the platform surface, then the open view is preserved and installation complexity is reduced, but the gate support structure complexity increases
Solution Approach 1:
The support function is extracted from traditional floor-based structures and consolidated into the tower assembly. The gate is supported by rollers mounted on the tower, eliminating the need for complex floor-level support structures and preserving the open view while reducing overall structural complexity.
Solution Approach 2:
The tower serves multiple functions: it provides structural support, houses the operator (motor), supports the roller mechanism for gate movement, and enables elevated gate positioning. This multi-functionality reduces the need for separate support structures, simplifying the overall gate support system while maintaining the elevated position for view preservation.
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
The system effectively blocks access when closed and facilitates access when open, reducing installation time and costs by using a compact design that can be installed on existing platforms with minimal excavation, preserving an open view and maintaining the gate in an elevated position.
Implementation Method 1
The gate is supported for horizontal movement along the track by a roller mounted on the tower
Implementation Method 2
The tower includes a pulley system to apply a tension and rotational force to the belt
Implementation Method 3
a motor disposed in a lower portion of the tower, the motor being movable on a slide track to adjust belt tension
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
A platform screen gate system having a tower, a gate secured to the tower. The gate is movable between an open position, to facilitate access to and from the platform, and a closed position, to block access to and from the platform. The system further includes at least one roller secured to the tower and a track secured to the gate. The track is supported by and movable on the least one roller such that the door cantilevers from the tower and remains above the platform when the door is moved between the open and closed positions.