Double-Leaf Door Closing Sequence Control With Driver Decoupling
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Solution Overview
Problem
Existing double-leaf door systems can unintentionally block the opening movement of the active leaf due to counter-movement strokes being blocked by inadvertently activated locks, leading to operational failures.
Innovation Solution
A device for closing sequence control that includes a locking rod, a blocking mechanism, a driver, and a control lever, which decouples the driver from the sliding block at a reversal point to prevent unintentional blocking, allowing the active leaf to open despite a malfunctioning blocking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lock blocks the closing movement of the sliding block to prevent the active leaf from closing, then the closing sequence control is improved, but the opening movement of the active leaf can be unintentionally blocked
Solution Approach 1:
The patent applies the dynamics principle by making the connection between the sliding block and driver conditional rather than fixed. The sliding block is designed to be detachably connected to the driver, allowing it to be coupled during closing movement for reliable sequence control, and decoupled during opening movement to prevent unintentional blocking. This dynamic coupling/decoupling mechanism resolves the contradiction by adapting the system's connectivity based on the operational phase.
Solution Approach 2:
The patent segments the functional relationship between the sliding block and driver into distinct coupling and decoupling states. The sliding block is separated from the driver during opening movement, allowing independent operation, while being connected during closing movement for coordinated control. This segmentation allows the system to achieve reliable closing sequence control without compromising opening movement freedom.
2Reliability
If the sliding block is connected to the locking rod to control closing sequence, then the closing control is improved, but the system complexity increases
Solution Approach 1:
The patent merges the closing sequence control function with the existing sliding block mechanism of the door closer. By integrating the driver function into the sliding block assembly and utilizing the existing guide rail infrastructure, the system achieves reliable closing sequence control without adding a completely separate locking mechanism. This merging reduces overall system complexity while maintaining the desired control reliability.
Data Source
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AI summary
A device for controlling the closing sequence of a double-leaf door comprises a locking bar movable between a retracted position and an extended position, a blocking mechanism for blocking a retraction movement of the locking bar in order to hold an active leaf in a hold position when the opening angle of a fixed leaf is greater than a predetermined limit angle, a follower attached to the locking bar which, in a driven state, is driven by a sliding block and, in a released state, is decoupled from the sliding block, and a control lever for rotationally fixed connection to a lever of a door closer, wherein the control lever is configured to perform a rotational movement with the lever during the opening and closing movement of the active leaf and, during the closing movement of the active leaf, to move the follower into its released state at a reversal point of the sliding block due to its rotational movement.to decouple the driver from the sliding block, so that the driver stops at the reversal point of the sliding block, the reversal point of the sliding block corresponding to the retracted position of the locking bar.