Double-Leaf Door Closing Sequence Control via Locking Mechanism
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Solution Overview
Problem
Existing closing sequence control systems for double-leaf revolving doors are complex and limited in versatility, particularly failing to accommodate automatic door drives and ensuring proper closure without collision between overlapping leaves, which is critical for smoke and fire protection doors.
Innovation Solution
A closing sequence control device with a locking mechanism controlled by the fixed leaf to hold the active leaf in a partially open position, using a blocking device actuated by the fixed leaf, and a brake mechanism on the active leaf side to regulate the closing sequence, allowing the stationary leaf to close before the moving leaf, with adjustable door drive mounting options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking device actuated by the fixed leaf is used to hold the active leaf in a partially open position, then the closing sequence is reliably controlled and leaves are prevented from colliding, but the device complexity increases due to additional blocking and triggering mechanisms
Solution Approach 1:
A transmission member acts as an intermediary between the fixed leaf and the blocking device. The transmission member translates the movement of the fixed leaf into blocking action on the active leaf, eliminating the need for complex direct actuation mechanisms while ensuring reliable closing sequence control
Solution Approach 2:
The blocking device is designed to be automatically actuated by the fixed leaf's movement through the transmission member. The system uses the fixed leaf's own motion to trigger the blocking action on the active leaf, eliminating the need for separate control mechanisms and reducing overall device complexity
2Ease of manufacture
If door drives are mounted on the hinge side with motors facing each other, then the assembly is simplified, but the arrangement is not universally adaptable to different mounting configurations
Solution Approach 1:
The transmission member and blocking device are designed with universal mounting capabilities that accommodate both hinge-side mounting (motors facing each other) and opposite-side mounting (motors facing away). The same basic components can be installed in different configurations without requiring specialized parts for each arrangement
Solution Approach 2:
The transmission member is designed to accommodate different mounting geometries through adjustable positioning and flexible connection methods. The system can dynamically adapt to different spatial arrangements of the door drives while maintaining the same blocking functionality
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
Ensures reliable and safe closure of double-leaf revolving doors by preventing collisions between overlapping leaves, maintaining functionality even in power failures, and allowing for flexible installation of door drives, thus addressing the limitations of existing systems.
Implementation Method 1
a brake mechanism on the active leaf side to regulate the closing sequence
Data Source
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AI summary
A device for controlling the closing sequence of double-leaf revolving doors is described, comprising an undercut active leaf (1) and an overcut inactive leaf (2), and door drives (3, 4) for motorized opening of the door leaves. Each door drive has an output shaft (10, 10') on which a sliding arm (13, 13') or a linkage for pivoting the door leaves is fixedly arranged, and the output shaft interacts with a spring assembly for closing the door leaves. The device further includes a locking device for the active leaf (1), which is controllable depending on the position of the inactive leaf (2). The locking device is arranged concentrically to the motor shaft (7) of the active-leaf door drive, and a transmission element (18) that interacts at one end with the locking device and at its other end with a release element (19) actuated by the inactive-leaf door drive depending on the position of the inactive leaf.The release element (19) is designed for an optional arrangement of the transmission element (18), whereby the direction of actuation of the blocking device remains the same, regardless of the mounting method of the door drives.