Movable Bolt Closure System for Door Security

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Solution Overview

Problem

Bolt lock systems face challenges in maintaining high security with minimal installation and maintenance efforts, particularly due to inaccuracies in door leaf positioning relative to the door frame, which can lead to reduced security over time as the door 'sets' due to gravity, requiring frequent adjustments and inspections.

Innovation Solution

A bolt closure system where the locking element is movably mounted along a first axis parallel to the frame part axis, allowing it to compensate for deviations and apply force to ensure the locking hook engages fully, with a detection device to monitor the locking status and a prestressing device to maintain contact without requiring complex initial alignment or regular maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the locking element is fixed in position, then the assembly structure is simple, but assembly inaccuracies and door settling cause reduced security over time

Engineering Contradiction:
Improvelocking securityVSAvoidbolt element mounting structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The bolt element is made movable along the first axis parallel to the frame part axis, allowing it to dynamically adjust its position to compensate for door settling and assembly inaccuracies. This dynamic capability ensures continuous optimal engagement between the locking hook and bolt element, maintaining high security without requiring complex adjustment mechanisms.

Inventive Principle:
Principle #15Dynamics

2Reliability

If the locking element is made movable to compensate for position deviations, then security is maintained over time, but the device complexity increases

Engineering Contradiction:
Improvelocking security consistencyVSAvoidmovable mounting mechanism
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The bolt element is designed with movable mounting along the first axis, enabling automatic position compensation for door settling and assembly variations. This single-degree-of-freedom movement provides continuous optimal engagement without requiring complex multi-axis adjustment mechanisms or frequent manual intervention.

Inventive Principle:
Principle #15Dynamics

3Reliability

If high assembly precision is required for optimal locking engagement, then security is maximized, but assembly effort and cost increase

Engineering Contradiction:
Improvelocking engagement qualityVSAvoidassembly process
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The movable bolt element compensates for assembly inaccuracies automatically during operation, eliminating the need for high-precision assembly procedures. The system adapts to position deviations through the bolt element's movement capability, significantly reducing assembly skill requirements and manufacturing costs while maintaining optimal locking engagement.

Inventive Principle:
Principle #15Dynamics

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 secure locking with minimal assembly and maintenance, as the system automatically adjusts to maintain optimal engagement of the locking hook with the locking element, preventing rattling and ensuring consistent security over time.

Implementation Method 1

the locking element is subjected to force along a first axis of movement in the direction of a home position

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP3527757B1Bolt closure system and a door assembly
Publication Date: 2020.11.11 GRETSCH UNITAS GMBH BAUBESCHLAGFABRIK
  • EP3527757B1 patent drawingFigure 1
  • EP3527757B1 patent drawingFigure 2
  • EP3527757B1 patent drawingFigure 3

AI summary

The invention relates to a bolt locking system, comprising a lock with a locking hook (16) arranged or arrangable on a door leaf, and a locking device which is arranged or arrangable on a frame part of a door frame extending along a frame part axis, wherein the locking device has a bolt element (28), wherein the locking hook (16) can be moved from a rest position into a locking position and is locked or lockable with the bolt element (28) in its locking position, wherein the bolt element is movably mounted along a first axis of movement (48) parallel to the frame part axis and is subjected to force along the first axis of movement in the direction of a home position.