Door Closer Anchor Assembly with Moveable Adjustor Plate
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Solution Overview
Problem
Existing door closers are not suitable for use with door hinges that have vertical adjustability or variable pivot axes, leading to undesirable forces that can reduce the lifespan of both the door closer and hinge components.
Innovation Solution
A door closer design featuring an anchor assembly with a moveable adjustor plate relative to a frame mounting plate, allowing the door leaf to be raised and lowered, and utilizing links of less than 40 mm in length to maintain components within the horizontal plane, along with a damper mechanism for controlled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a door closer with fixed linkages and parallel shafts is used, then the structure is simple and robust, but the door leaf cannot be raised or lowered relative to the door frame without causing skewing of components
Solution Approach 1:
The anchor assembly incorporates a moveable adjustor plate that can dynamically change its position relative to the frame mounting plate. This allows the door closer to adapt to different door leaf positions (raised or lowered) while maintaining proper alignment of the linkages and parallel shafts in the horizontal plane, preventing skewing and component failure
Solution Approach 2:
The anchor assembly is segmented into distinct components: a frame mounting plate and a moveable adjustor plate. This segmentation allows independent adjustment of the adjustor plate position to accommodate different hinge types and door configurations while keeping the main structure stable
2Adaptability or versatility
If the door closer is designed with standard link length, then the operating range is sufficient, but components may contact the edge mounting member or outwardly extending flange parts when used with variable pivot axis hinges
Solution Approach 1:
The link length is changed from standard dimensions to less than 40 mm. This parameter change reduces the operating envelope of the linkages, preventing them from contacting the edge mounting member or outwardly extending flange parts when used with variable pivot axis hinges, thereby eliminating a source of wear and failure
Solution Approach 2:
The moveable adjustor plate acts as an intermediary between the frame mounting plate and the actuator assembly. It provides an additional degree of freedom that allows the system to accommodate variable pivot axis movement without transmitting contact forces to the linkages and parallel shafts
3Strength
If the linkages and parallel shafts are kept in the horizontal plane, then component strength is maintained, but the door closer cannot accommodate door leaf vertical adjustment
Solution Approach 1:
The moveable adjustor plate provides dynamic adjustment capability, allowing the door closer to maintain the linkages and parallel shafts in the horizontal plane (preserving strength) while accommodating vertical door leaf adjustment through plate repositioning
Data Source
AI summary
A door closer, including:an anchor assembly, including:a frame mounting plate which is fixable relative to a door frame; andan adjustor plate; andan actuator assembly for mounting within the thickness of a door leaf to move the door leaf between open and closed configurations relative to the door frame, the actuator assembly including an operating member coupled by a link to the adjustor plate and mounted for a range of movements between a fully retracted position, in which the anchor assembly is held adjacent the actuator assembly when the door leaf is in the closed configuration, and an extended position, in which the anchor assembly is in spaced relation to the actuator assembly when the door leaf is in the open configuration, the link being configured to extend from the adjustor plate along a first axis, wherein the frame mounting plate is provided with one or more slot(s), the or each slot being elongated along a second axis, the second axis being generally orthogonal to the first axis.