Turnstile Locking Unit Sandwich Construction
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Solution Overview
Problem
Conventional turnstile systems are often subjected to significant stress and manipulation attempts, leading to structural issues such as excessive weight and high production costs, which complicates their operation and maintenance.
Innovation Solution
A locking unit with a sandwich construction using interposed spacers between base and bearing plates, combined with a two-stage switching disk and pivotably mounted pawls, provides enhanced torsional rigidity and control over the turnstile system while reducing material usage and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If locking units are designed with massive steel plates or aluminum milling plates to ensure torsional rigidity, then the structural strength and resistance to manipulation attempts are improved, but the weight of the locking unit increases significantly
Solution Approach 1:
The locking unit is segmented into multiple thin-walled profile elements (U-profiles and C-profiles) arranged in a triangular configuration, replacing the conventional single massive plate structure. This segmentation maintains torsional rigidity through the geometric arrangement and interconnection of lighter profile elements.
Solution Approach 2:
The locking unit employs a composite structure combining multiple aluminum or steel profile elements with different cross-sectional geometries (U-profiles and C-profiles) arranged in a triangular configuration. This composite arrangement achieves high torsional rigidity-to-weight ratio by leveraging the geometric configuration rather than relying on material mass alone.
2Reliability
If locking units are designed with massive structure to resist manipulation attempts, then the reliability under stress is improved, but the production costs increase due to material consumption
Solution Approach 1:
The locking unit is divided into multiple standardized profile elements that can be manufactured separately and assembled together, reducing material waste and production complexity compared to manufacturing a single large solid plate.
Solution Approach 2:
The design changes the structural parameters from solid plate geometry to thin-walled profile geometry, optimizing the strength-to-material-cost ratio by using less material in a more efficient configuration.
3Stability of the object's composition
If locking units are designed with massive elements to ensure structural integrity, then the stability under load is improved, but the ease of operation deteriorates due to increased weight
Solution Approach 1:
The locking unit uses multiple lightweight profile elements instead of a single heavy component, reducing the overall mass that the actuator must move while maintaining structural integrity through the distributed configuration.
Solution Approach 2:
The composite profile structure achieves high structural integrity with reduced mass, making the locking unit easier to actuate while maintaining resistance to manipulation attempts.
4Strength
If conventional solid plate structures are used for locking units, then the torsional rigidity is achieved, but the device complexity increases due to the need for massive superstructure
Solution Approach 1:
The locking unit is segmented into a triangular arrangement of profile elements, achieving torsional rigidity through geometric configuration rather than requiring a massive solid structure, thereby simplifying the overall superstructure.
Data Source
Figure 1~2
Figure 3
Figure 4~6
AI summary
The invention relates to a turnstile system comprising a locking unit (1) which is associated with the turnstile system in a rotationally fixed manner and allows the turnstile system to be incrementally moved with the help of corresponding locking members and thus access to be controlled to an area that is secured by means of the turnstile system. According to the invention, such a locking unit (1) is advantageously produced as a sandwich structure by screwing together several plates (2, 4, 6) and placing spacers (5) therebetween rather than using a massive base plate. In an advantageous embodiment, the pawls (13, 13') that cooperate with a switching disk (3) can be differently hinged to obtain different functionalities and a different currentless behavior in accordance with the application. The invention is used in access control devices.