Adjustable Hinge Pin Locking Mechanism for Heavy Doors
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Solution Overview
Problem
Existing adjustable hinges for heavy window or door casings are cumbersome and require disassembly for adjustments, making it difficult to achieve precise and stable settings, especially due to the weight and interdependence of pressure and side adjustments.
Innovation Solution
The hinge design incorporates a threaded screw with a flanged head to lock the pin and bush assembly in place, allowing adjustments without disassembly, and modified washers that can be inserted without lifting the wing, along with improved bush mechanisms for easier rotation and locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the wing is made heavier to support large window or door casings, then the structural strength is improved, but the ease of operation deteriorates due to difficulty in adjusting and positioning
Solution Approach 1:
The hinge incorporates adjustable bushes with offset centers that can be rotated to dynamically change the pivot point position, enabling the heavy wing to be precisely positioned and adjusted despite its weight. The dynamic adjustment mechanism allows workers to compensate for weight-related positioning difficulties.
2Stability of the object's composition
If the adjustment mechanism uses traditional bushes with grooves and keying teeth, then the locking stability is improved, but the ease of operation deteriorates as the wing must be lifted and disassembled for adjustment
Solution Approach 1:
The invention extracts the adjustment function from the main hinge body by using independently rotatable bushes that can be adjusted without disassembling the wing or main hinge components. This allows the adjustment operation to be separated from the heavy lifting and disassembly operations.
Solution Approach 2:
The bushes are pre-positioned with offset centers and keying teeth that engage with grooves in the hinge bodies, creating a preliminary locked structure that maintains stability while allowing subsequent rotation-based adjustment without full disassembly.
3Measurement precision
If pressure and side adjustments use separate bushes, then the adjustment precision is improved, but the device complexity increases and adjustments become interdependent
Solution Approach 1:
Each adjustable bush serves multiple functions: it provides both pressure adjustment (through rotation changing the offset center position) and side adjustment (through the same rotational mechanism). This multi-functionality reduces the number of separate adjustment mechanisms needed while maintaining precision.
4Ease of operation
If adjustment requires disassembly of screw-covering cases, then the accessibility for adjustment is improved, but the loss of time increases due to assembly and disassembly operations
Solution Approach 1:
The invention extracts the adjustment mechanism from the enclosed hinge body by using externally accessible bushes that can be rotated and adjusted without removing screw-covering cases or disassembling the hinge assembly, eliminating time-consuming disassembly operations.
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
Facilitates easier and more precise adjustments, ensuring a stable and long-lasting locking mechanism for window and door casings, reducing assembly time and minimizing the risk of losing parts, while maintaining optimal regulation.
Implementation Method 1
inserting a threaded means transverse to the pin, so that, upon rotating the threaded means, the pin is moved
Implementation Method 2
obtaining the side adjustment through a longitudinal cam that is integral with the pin: in this way it is enough to rotate the cam in order to obtain a displacement
Data Source
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AI summary
An adjustable hinge is disclosed for window or door casing (1) of the heavy type (particularly doors), comprising: at least two bodies (7, 17) adapted to allow fixing the hinge (1) on window or door casing and on a fixed frame; an articulation pin (3); two adjusting bushes (5, 26); at least one adjusting screw (4); a plurality of shimming washers (2); two end plugs (22); and a small oscillating bush (29) adapted to contain therein the adjusting screw (4); and at least one locking screw (50) equipped with a head (51) with a flange (52) adapted to be inserted into the pin (3) of the hinge (1).