Sliding Door Roller Retaining Rocker Mechanism
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Solution Overview
Problem
Existing sliding door safety systems require a stable and resilient connection area between the safety device and the supporting part to absorb forces when a door leaf is lifted, which can lead to appreciable loads on the connection area, compromising safety and stability.
Innovation Solution
A rocker-based safety device that pivots relative to the support part about an axis parallel to the door leaf's displacement direction, with its upper end facing the roller or slider below the running rail and supported at the lower boundary of the opening, absorbs forces without loading the pivot axis, ensuring the support part can handle dynamic loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stable and resilient connection area is designed to absorb forces when the door leaf is lifted, then the safety device can prevent detachment, but the connection area is subjected to appreciable loads which compromises safety and stability
Solution Approach 1:
The safety device is segmented into a rocker component and a separate connection area. The rocker absorbs lifting forces through its pivoting motion, while the connection area only bears the minimal weight of the running part, separating the force absorption function from the connection function.
Solution Approach 2:
The rocker is designed to pivot dynamically when lifting forces occur, allowing it to absorb forces through motion rather than rigid resistance. The rocker can rotate about its axis parallel to the door leaf's displacement direction, converting static load-bearing into dynamic force absorption.
2Reliability
If the safety device uses a rocker that pivots about an axis, then forces can be absorbed without loading the connection area, but the rocker mechanism adds structural complexity
Solution Approach 1:
The rocker serves multiple functions: it acts as a safety device preventing detachment, absorbs lifting forces through pivoting, and its lower end provides direct support on the boundary plane. This multi-functionality reduces the need for additional components despite the pivoting mechanism.
Solution Approach 2:
Instead of fixing the safety device rigidly to the support part, the invention inverts the approach by allowing the rocker to pivot freely on the axis, with the lower end providing support contact. This inversion transforms a potential weakness (pivoting connection) into a strength (force-absorbing mechanism).
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 effectively absorbs forces when a sliding door leaf is lifted, ensuring high load-bearing safety without appreciably loading the connection area, maintaining stability and preventing unintentional detachment, while allowing deliberate unhinging by pivoting the rocker.
Implementation Method 1
the safety device consists of a rocker which can be pivoted relative to the support part about an axis running parallel to the displacement direction of a sliding door leaf
Implementation Method 2
the forces occurring in the event of a load - i.e. when a sliding door leaf is lifted - due to the rocker striking the underside of the running rail are absorbed at the lower boundary level of the opening in the supporting part
Data Source
Figure 1
Figure 2~3
Figure 4a~4c
AI summary
The invention relates to a running part (5) for a sliding door leaf (3), comprising a supporting part (7) that can be fixed on the door panel side and an axle pin (8) attached thereto and supporting a roller (9) or a sliding piece, and a retaining device (10) by means of which the roller (9) or slider is prevented from coming out of a guide track (1a) of a rail (1), wherein the retaining device (10) is made of a rocker (13) pivotable about an axis extending parallel to the sliding direction of a sliding door leaf (3) relative to the supporting part (7), disposed within a penetration (14) of the supporting part (7). The upper end (13a) facing the roller or slider is disposed below a rail (1) in the retaining position and the other end thereof (13b) is disposed directly opposite a lower boundary plane (14a) of the penetration (14) of the supporting part (7) and is supported thereby when loaded.