Window Fitting Orthogonal Pulling Mechanism for Sealing
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Solution Overview
Problem
Existing fittings that improve water tightness, heat insulating properties, and sound insulating properties by obliquely sliding a sash to press on tight materials face issues with increased operating force and complex structures, as well as potential rattling due to reaction forces on sash rollers.
Innovation Solution
A fitting design where a sash slides along a rail or stile member using a rolling body, with an operating handle and drive mechanism to move a pulling member in the thickness direction, allowing the sash to move relative to the opening frame without requiring the rail or stile members to move relative to each other, incorporating orthogonal rail and stile members with a pulling mechanism to enhance sealing without increasing operational force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sash is obliquely slid to press on tight materials, then water tightness, heat insulating properties, and sound insulating properties are improved, but operating force increases
Solution Approach 1:
The sash roller part and lower frame part are configured to move relative to each other, creating a dynamic oblique guide mechanism that presses the lower frame part on tight materials during sliding operation, improving sealing while managing operating force through controlled movement
Solution Approach 2:
The oblique guide mechanism introduces movement in a direction orthogonal to the track, adding a dimensional component to the sliding motion that enables pressing action on tight materials without requiring purely linear movement
2Reliability
If the sash roller part and lower frame part move relative to each other, then the oblique guide mechanism can press on tight materials, but the structure becomes complex
Solution Approach 1:
The relative movement between sash roller part and lower frame part creates the necessary pressing action through dynamic interaction rather than static complex mechanisms, achieving sealing function through controlled motion
Solution Approach 2:
The lower frame part serves multiple functions: supporting the sash load, providing the oblique guide surface for pressing action, and moving relative to the sash roller part to enable sealing, reducing the need for separate dedicated components
3Reliability
If the lower frame part moves in direction orthogonal to track, then pressing action on tight materials is achieved, but large reaction force is applied on sash roller part axle
Solution Approach 1:
The orthogonal movement of the lower frame part is controlled through the dynamic interaction with the sash roller part, allowing pressing action while the rolling motion absorbs and distributes reaction forces, reducing impact on the axle
Solution Approach 2:
The oblique guide mechanism acts as an intermediary between the sliding motion and the pressing action, transferring force through a controlled path that reduces direct reaction force on the sash roller part axle
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 enhances water tightness, heat insulation, and sound insulation without complex structures or increased operational force, reducing the risk of rattling and wear on tight materials, while allowing smooth sliding of the sash.
Implementation Method 1
a sash slides along a longitudinal direction of a rail or stile member by rolling a rolling body provided on the rail or stile member on a guide surface
Data Source
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AI summary
A fitting includes a movable sash 30 that is provided so as to be slidable relative to an opening frame 10 by abutting sash rollers 36 of a movable bottom rail 33 on a bottom guide surface 101 of a guide track 100 provided on a bottom frame member 12. The fitting includes a bottom slide member 40B that is provided on the movable bottom rail 33 so as to slide in the longitudinal direction of the movable bottom rail 33 when an operating handle 50 provided on the movable sash 30 is operated, a pulling member 72 that is provided so as to be movable along the thickness direction of the movable bottom rail 33, and a drive mechanism (71, 74, and 76) that moves the pulling member 72 in the thickness direction of the movable bottom rail 33 according to the slide of the bottom slide member 40B. The movable sash 30 is moved in the thickness direction relative to the opening frame 10 by abutting the pulling member 72 on a thickness-direction-facing surface of a bottom frame member 12.