Device for anchoring on a roof, in particular on a roof with a sealing membrane
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Solution Overview
Problem
Existing anchoring devices for roofs with waterproofing membranes face challenges in maintaining a watertight seal due to the need to pierce the membrane for installation, leading to potential water infiltration and complex installation processes.
Innovation Solution
An anchoring device featuring a blind sealing nut that covers the anchor rod and fixing nut, along with a threaded tube for enhanced sealing, and a sealing collar that integrates with the waterproofing membrane, ensuring a secure and watertight connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the anchoring device pierces the sealing membrane to fix the anchor rod, then the anchoring device can be securely fixed to the roof, but water infiltration occurs between the fixing means and the sealing membrane
Solution Approach 1:
A sealing collar is introduced as an intermediary component between the anchor rod and the sealing membrane. The collar includes a sealing flange that extends beyond the anchor rod and is connected to the sealing membrane, creating a barrier that prevents water infiltration while allowing the anchor rod to pass through the membrane for secure fixing.
Solution Approach 2:
The sealing system is segmented into multiple functional parts: the sealing collar separate from the anchor rod, the sealing flange extending beyond the rod, and the connection to the sealing membrane. This segmentation allows each component to perform its specific function - the anchor rod provides fixing strength while the sealing collar and flange prevent water infiltration.
2Object-affected harmful factors
If a cover collar is used to cover the fixing screws, then water infiltration is reduced, but the installation process becomes more complex requiring passage under the collar and temporary raising
Solution Approach 1:
The sealing collar is pre-assembled with the anchor rod before installation on the roof. This preliminary assembly ensures proper positioning and sealing configuration, eliminating the need for complex on-site adjustments and passage under the collar during installation.
Solution Approach 2:
The sealing collar is merged with the anchor rod assembly as an integrated unit. The collar is positioned to cover the fixing screws and connect to the sealing membrane, combining the sealing function with the fixing mechanism to simplify the overall installation process.
3Strength
If multiple bolts are used to fix the plate to the roof, then the fixing strength is improved, but the number of piercings through the sealing membrane increases leading to more sealing risks
Solution Approach 1:
The sealing collar acts as an intermediary that distributes the sealing function across multiple anchor rod piercings rather than requiring separate sealing for each bolt. The collar connects to the sealing membrane and covers the fixing screws, reducing the number of direct piercings needed while maintaining fixing strength.
Data Source
Figure 1~4
Figure 5~9
Figure 10~14
AI summary
The device has a plate (1) resting on a roof and comprising a central hole. An anchoring rod (4) is passed by the hole and arranged to be attached on the roof by its lower end. The rod has a thread toward its upper end (41) to receive a fixing bolt to tighten the plate against the roof. A sealing unit ensures a sealing between the rod and the plate, and a threaded tenon fixes the object to the upper end. A blind sealing nut (3) is screwed at an upper end of the device and arranged to top the upper end of the rod and an adjusting nut (42), where the sealing nut bears the tenon.