Pivotable Clamping Element for Double-Leaf Revolving Door Locking
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Solution Overview
Problem
Existing closing sequence control systems for double-leaf revolving doors are inadequate for large leaf weights, often resulting in insufficient clamping or jamming issues.
Innovation Solution
A closing sequence control system with a trigger and lock mechanism in the sliding rail, utilizing a cable pull transmission element and a pivotable clamping element with a clamping spring, which allows for secure locking and adjustable holding force, eliminating the need for a spring element and enabling correct closing sequence even with large leaf weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a clamping plate with locking member is used in the slide rail, then the locking function is provided, but the clamping effect is insufficient for large sash weights and the clamping plate notches into the locking rod and jams
Solution Approach 1:
Instead of having a stationary clamping plate that actively grips the moving locking rod, the invention inverts the approach by making the clamping element pivotable and having the locking rod actively engage with it. The locking rod is forced into the clamping element by door leaf weight, creating a more reliable mechanical engagement that prevents jamming while providing sufficient clamping force for large weights
2Ease of operation
If a spring element is used to move the locking rod, then the locking rod movement is enabled, but additional installation space is required and the torque curve of the door drive is influenced
Solution Approach 1:
The invention extracts and removes the spring element from the system entirely. Instead of using a spring to move the locking rod, the system utilizes the weight of the door leaf itself to force the locking rod into engagement with the clamping element. This eliminates the need for additional installation space for spring components and avoids influencing the torque curve of the door drive
3Reliability
If the slider is held in a latching manner in the release device, then the locking position is maintained, but the slider cannot be released for opening movement
Solution Approach 1:
The invention applies dynamics by making the clamping element pivotable rather than stationary. The clamping element can dynamically switch between a clamping position (when the door leaf is closed) and a releasing position (when the door leaf is opened). This dynamic mechanism allows the system to maintain reliable locking during the closed state while automatically enabling release during opening movement, resolving the contradiction between stability and release capability
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 ensures secure locking and correct closing sequence of double-leaf doors with large leaf weights, improving performance by up to 30% and allowing for larger door opening widths, while reducing the risk of jamming and overload damage.
Implementation Method 1
a transmission element is arranged between the trigger and the lock, which is advantageously designed as a cable pull
Implementation Method 2
a pivotable clamping element consisting of at least two lamellae is arranged in the lock, which engages around the locking bar and - in the locking direction of the active leaf - is automatically locked into the locking position by the locking bar is pivoted. A clamping spring is arranged to support the clamping element in the blocking direction
Implementation Method 3
The friction of the lamellae 26 when pivoting against one another, during the braking process, results in an additional energy reduction in the movement of the active leaf 1, which further increases the holding force of the lock 11
Data Source
Figure 1~2
Figure 3
AI summary
The device for the closing sequence control for two-leaf revolving doors, with a lock (11) which has a movable locking rod, has a clamping element to block the movement of the locking rod and provided with at least two discs, as a result of which several clamping positions, which correspond to the number of discs, are created by the locking rod. The discs are movable in relation to each other, wherein an additional braking action ensues by the friction of the discs upon each other.