Generator-Actuated Door Leaf Blocking Device

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Solution Overview

Problem

Existing double-leaf door closing sequence control systems require complex mechanical connections and mechanisms to ensure proper closure, especially in the event of a power failure, making them costly and difficult to install.

Innovation Solution

The system uses an electrically controlled switching unit, actuated by the generator effect of the motor, to control the blocking device of the active leaf, eliminating the need for a mechanical connection between the drives and allowing the doors to close securely even without power, using a bistable magnet or piezoelectric element as the switching element.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a mechanical connection between drives is used to control the blocking device, then the closing sequence control is reliable, but the device complexity and installation cost increase

Engineering Contradiction:

Improveclosing sequence control reliabilityVSAvoidmechanical connection complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical connection system (cables, push rods, or springs) with an electrical control system. The fixed leaf drive electrically controls the blocking device of the active leaf through electrical signals, eliminating the need for continuous mechanical connections between the two drives while maintaining reliable closing sequence control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts the mechanical connection requirement by implementing independent drives for each door leaf. The fixed leaf drive can independently control the active leaf's blocking device through electrical signals, removing the necessity for physical mechanical linkages between the drives.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a mechanical connection between drives is used to control the blocking device, then the closing sequence control is reliable, but the installation cost and difficulty increase

Engineering Contradiction:

Improveclosing sequence control reliabilityVSAvoidinstallation ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent substitutes mechanical installation requirements with electrical connections. The fixed leaf drive electrically actuates the blocking device without requiring complex mechanical linkages, significantly simplifying installation while maintaining reliable closing sequence control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If only one cable is used to control the switching element, then the installation is simplified, but the control reliability during closing sequence may be compromised

Engineering Contradiction:

Improveinstallation simplicityVSAvoidclosing sequence control reliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent uses a single cable connected to a switching element that is electrically actuated by the fixed leaf drive. The switching element converts electrical control signals into mechanical action on the blocking device, achieving both installation simplicity and control reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This design simplifies the installation and reduces costs by eliminating the need for continuous mechanical connections between door operators, ensuring reliable closure in both powered and unpowered states, with only one cable required to control the switching element.

Implementation Method 1

The drive (5) of the fixed leaf (3) and the drive (6) of the active leaf (4) for controlling the blocking device (11) of the active leaf (4) during the closing process when the door (2) is de-energized are electrically connected in such a way that the locking mechanism of the fixed leaf (3) with its motor drive (7) generates a control current for deactivating the blocking device (11), in particular by means of the generator effect of the motor drive (7)

Methodology Applied

Scientific EffectGenerator effect: Electromagnetic Induction

Implementation Method 2

with a bistable magnet or piezoelectric element as the switching element

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentEP2650461B1Device for controlling the closure sequence a self-closing double-leaf door and a method for controlling the closing of a self-closing door and fireproof door with a device for controlling the closure sequence

Publication Date: 2019.03.20 GU AUTOMATIC

Figure 1
Figure 2

AI summary

The device has gear wing (4) and fixed wing (3) that are opened by electric motor and closed by closing mechanism. The gear wing is connected to blocking device and controlled in dependence on position of fixed wing. The drive (5) of fixed wing and drive (6) of gear wing are electrically connected to control blocking device during closing process of gear wing at electroless state of door (2). The control current is generated by generator effect of motor drive of fixed wing, for deactivating blocking device. Independent claims are included for the following: (1) fire or smoke protective door; and (2) method for controlling closing sequence of self-closing double-leaf door.