Sound Insulation Door Glazing Bead Inversion

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Solution Overview

Problem

Existing soundproof doors with heavy glass panels face challenges in achieving full contact between the glass and its frame due to non-parallel surfaces, leading to compromised soundproofing, reduced glass surface area, and aesthetically unfavorable frame thickness.

Innovation Solution

The glazing bead is screwed against a surface parallel to the glass plane, using hollow metal profiles to evenly clamp the glass, reducing the frame's thickness and increasing the glass surface area, while ensuring secure fixation through tensile stress and reduced overhang.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the glazing bead is mounted parallel to the glass plane with a wide overhang, then the glass panel can be securely fixed, but the clear glass surface area is reduced and the door appearance is compromised

Engineering Contradiction:

Improvefixation securityVSAvoidclear glass surface area

Core Design Contradiction:

StrengthVSArea of moving object

Solution Approach 1:

The glazing bead is inverted from the conventional mounting parallel to the glass plane to mounting perpendicular to the glass plane. This inversion allows the fastening screws to engage the second profile from the rear, pressing the glass edge against the first profile's bearing surface, thereby securing fixation while minimizing the bead's projection and maximizing clear glass area.

Inventive Principle:

Principle #13The other way round (Inversion)

2Strength

If the glazing bead is made very high to securely fix the heavy glass pane, then fixation security is improved, but the clear surface of the glass pane is reduced

Engineering Contradiction:

Improvefixation securityVSAvoidclear glass surface

Core Design Contradiction:

StrengthVSArea of moving object

Solution Approach 1:

By inverting the mounting orientation of the glazing bead from parallel to perpendicular relative to the glass plane, the structural height requirement is eliminated. The perpendicular mounting allows the bead to function effectively with minimal projection, as the securing action is achieved through the screw engagement with the second profile rather than through bead height.

Inventive Principle:

Principle #13The other way round (Inversion)

3Strength

If the profile frame has considerable thickness to secure the glass panel, then fixation security is improved, but the installation situation and door appearance are adversely affected

Engineering Contradiction:

Improvefixation securityVSAvoidframe thickness

Core Design Contradiction:

StrengthVSShape

Solution Approach 1:

The inversion of the glazing bead mounting orientation enables the use of thinner profile frames. By mounting the bead perpendicular to the glass plane and engaging screws with the second profile from the rear, adequate fixation security is achieved without requiring substantial frame thickness, thereby improving both installation conditions and door appearance.

Inventive Principle:

Principle #13The other way round (Inversion)

4Reliability

If the surfaces enclosing the glass plate are made absolutely plane-parallel, then full contact and soundproofing are improved, but manufacturing complexity and effort increase significantly

Engineering Contradiction:

ImprovesoundproofingVSAvoidmanufacturing effort

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

By inverting the glazing bead mounting to perpendicular orientation and positioning it at the edge of the glass panel rather than enclosing it on all sides, the requirement for absolutely plane-parallel enclosing surfaces is eliminated. The bearing surface of the first profile and the inverted glazing bead contact only the edge region of the glass, significantly reducing manufacturing precision requirements while maintaining effective soundproofing.

Inventive Principle:

Principle #13The other way round (Inversion)

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 solution enhances sound insulation, increases the clear glass surface area, and improves the door's visual appeal by reducing the frame's thickness and overhang, while maintaining secure fixation of the glass panel.

Implementation Method 1

the stress on the screws is no longer bending but tensile

Methodology Applied

Scientific EffectTensile stress: Tension

Data Source

PatentEP2314817B1Sound insulation door

Publication Date: 2017.05.31 PANTERI ALESSANDRO

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AI summary

The door has a pivotable door wing (2) including a rectangular, massive glass plate (4) provided as a filling in a profile frame (3). An edge region of the plate is surroundingly fixed at four sides between a contact surface of a rectangular profile (31) of the frame and a glass holding strip (33). The strip is screwed against a surface of another rectangular profile (32) of the frame for pressing the edge region against the contact surface. The surface of the latter profile is provided parallel to a plane of the plate. The frame is interlocked with a casing (1) in three-fold manner.