Vertical Rod Coupler Cam Lock Adjustment Mechanism
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Solution Overview
Problem
Traditional multi-point latching devices require complex adjustments and are inaccessible when the door is hung in a door frame, making it difficult to align vertical rods with actuators for proper operation, especially when rods are concealed within the door.
Innovation Solution
A vertical rod coupler system that allows for easy adjustment of vertical rods using a bolt and cam lock mechanism, enabling decoupling and recoupling with minimal manipulation, allowing rods to self-adjust under gravity or biasing forces, thus aligning with actuators without direct operator input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional multi-point latching devices are used with concealed vertical rods, then the aesthetic appearance is improved, but the alignment and adjustment of vertical rods with actuators becomes inaccessible and difficult
Solution Approach 1:
The adjustment mechanism is nested within the door structure itself. The vertical rod coupler includes a bolt that threads into the door, allowing adjustment of the vertical rod's position relative to the actuator while keeping all adjustment components concealed within the door assembly, maintaining aesthetic appearance while enabling accessibility.
2Manufacturing precision
If complex adjustment mechanisms are used to align vertical rods with actuators, then the alignment precision is improved, but the device complexity and number of fasteners increase
Solution Approach 1:
The adjustment function is segmented into two independent directions: vertical position adjustment via the bolt threading into the door, and horizontal/vertical rod positioning via the cam lock mechanism. This segmentation allows precise alignment in multiple dimensions using simple, separate components rather than a complex integrated adjustment mechanism.
Solution Approach 2:
The vertical rod coupler acts as an intermediary component between the vertical rod and the actuator. It provides the adjustment interface and couples the rod to the actuator, eliminating the need for direct complex mounting and reducing the number of fasteners required.
3Reliability
If vertical rods are firmly clamped to actuators, then the operational reliability is improved, but the ease of adjustment and maintenance becomes difficult
Solution Approach 1:
The coupling mechanism transitions from a static fixed connection to a dynamic adjustable connection. The cam lock allows the coupling to be easily released and repositioned, while the bolt provides adjustable clamping force. This dynamic capability enables firm clamping during operation while allowing easy adjustment and maintenance when needed.
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 quick and easy alignment of vertical rods with actuators, simplifying installation and maintenance by allowing rods to self-adjust while the door is hung, ensuring proper operation of multi-point latching devices without the need for extensive fastener manipulation.
Implementation Method 1
a cam lock including a cam lock through-hole and a pin camming surface. The cam lock through-hole is configured to receive the shaft, and the pin camming surface is configured to cam the transverse pin to adjust a tension force in the shaft when the shaft is rotated
Implementation Method 2
The bracket and the cam lock are configured to apply a clamping force to a vertical rod, wherein the clamping force is based at least partly on the tension force
Implementation Method 3
rotating the bolt of the vertical rod coupler to a first rotational position to decouple a vertical rod from an actuator of the multi-point latching device, allowing the vertical rod to move under force of gravity
Data Source
AI summary
A vertical rod coupler includes a bracket, bolt, and cam lock. The bolt is disposed through the bracket and the cam lock, and includes a head and a transverse pin. When the bolt is rotated relative to the cam lock, a pin camming surface cams the transverse pin to adjust the tension in the bolt and/or a distance between the head and the bracket.