Vertically Folding Barrier Gate Arm Multi-Articulated Hinge
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Solution Overview
Problem
Conventional vertically folding barrier gate arms face issues such as reduced clearance for vehicles, susceptibility to wobbling, entrapment of objects, and high repair costs due to integral design, which limits their adaptability and safety.
Innovation Solution
A vertically folding barrier gate arm with a multi-articulated compound hinge system, featuring a proximal and distal segment connected by a 180° pivoting hinge, utilizing a plurality of interconnected links with constrained rotation, allowing for efficient folding and extension while minimizing space and preventing wobbling, and enabling field serviceability and customization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a vertically folding barrier gate arm with a second distal outer segment folding 180° is used, then maximum vertical clearance for vehicles is provided, but the outer distal second segment wobbles or bangs against the first segment in high wind or due to loose connection
Solution Approach 1:
The patent applies preliminary action by applying torque to the second segment when the barrier gate arm is in the open position to secure the second segment substantially flush to the first segment before wind or other forces can cause wobbling. This preventive measure ensures stability is established in advance rather than reacting to instability after it occurs.
2Stability of the object's composition
If torque is applied to the second segment to secure it flush to the first segment, then wobbling is minimized, but objects or persons can be crushed by the full force of the operator motor
Solution Approach 1:
The patent applies beforehand cushioning by using a spring mechanism that absorbs and cushions the force when the second segment is secured to the first segment. The spring provides a gradual, controlled force rather than the full abrupt force of the operator motor, preventing crushing of objects or persons while still achieving the stability needed to prevent wobbling.
3Device complexity
If the entire barrier gate arm is designed as an integral system, then articulation control is simplified, but repair costs increase when any part is damaged as all segments must be replaced
Solution Approach 1:
The patent applies segmentation by dividing the barrier gate arm into separate, modular segments (first segment and second segment) that can be independently replaced. This modular design allows individual segments to be serviced and replaced without replacing the entire arm assembly, reducing repair costs while maintaining the integrated articulation control system.
4Ease of manufacture
If conventional vertically folding barrier gate arms are used, then installation is straightforward, but the outer distal second segment extends over the roadway reducing clearance and is susceptible to being hit by tall vehicles
Solution Approach 1:
The patent applies another dimension by changing the folding angle from the conventional 90° to a 180° fold for the second segment. This dimensional change in the folding mechanism allows the second segment to fold back along the same plane as the first segment rather than extending perpendicular to it, reducing the horizontal extension over the roadway while maintaining installation simplicity.
Data Source
AI summary
A vertically folding barrier gate arm has a proximal first segment and a distal second segment connected by a pivot hinge allowing them to fold. An extension set pivotally affixed to an outer offset bracket on the housing for the motor of the gate arm is connected to an outer offset bracket on the distal gate arm segment by a multi-articulated compound hinge formed by a plurality of links attached to each other by hinges providing a constrained range of rotation relative to each other. The gate arm translates from a fully extended position where the proximal and distal gate arm segments are parallel and co-linear along a horizontal longitudinal axis, to a vertically folded position where the proximal and distal gate arm segments lie substantially against each other within the plane of rotation of the first segment.