Roof Mounting Structure for Load-Spreading and Waterproof Sealing
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Solution Overview
Problem
Existing roof-installed object securing devices concentrate the weight of solar cell modules and other roof-installed objects on a narrow range of the roof structural member, leading to potential damage and increased costs due to the need for high-strength materials, while also risking water ingress through exposed screws.
Innovation Solution
A roof-installed object securing device featuring a flat plate-like securing member with a through-hole and peripheral wall, a mounting piece with multiple holes, an erected portion, a slit, and an external thread member that disperses the weight of the object across a wider area, using a cover member to seal against rainwater and allow for adjustable positioning of the external thread portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the supporting member is formed with high-strength metal to endure the weight of the roof-installed object, then the strength and rigidity are improved, but the cost of the securing device is increased
Solution Approach 1:
The supporting function is segmented between the cover member (which provides structural support) and the supporting member (which only needs to provide mounting points). This allows the supporting member to be made from lower-strength, less expensive materials while the cover member handles the primary load-bearing function.
Solution Approach 2:
The cover member acts as an intermediary between the roof structural member and the supporting member. It transfers the weight of the roof-installed object to the roof structural member, allowing the supporting member to use lower-strength materials while still providing adequate support functionality.
2Ease of manufacture
If the supporting member is mounted through a through-hole of the cover member, then the cost of the cover member is reduced by using low-strength material, but the weight of the roof-installed object acts on the roof structural member in a concentrated manner on a narrow range
Solution Approach 1:
The mounting piece extends in a direction perpendicular to the cover member (downward toward the roof structural member), creating a three-dimensional structure that distributes the load over a larger area of the roof structural member rather than concentrating it at a single point.
Solution Approach 2:
The flat plate-like mounting piece with multiple mounting holes creates localized contact points that distribute the concentrated load from the supporting member across a wider area of the roof structural member, reducing the harmful concentrated action while maintaining the cost-effective through-hole configuration.
3Device complexity
If the external thread member is fixed in position, then the structure is simpler, but the positioning of the roof-installed object cannot be adjusted
Solution Approach 1:
The external thread member is made movable along the slit in the installing portion, transforming it from a fixed static element to a dynamic adjustable element. This allows the position to be changed during installation to accommodate different positioning requirements while maintaining overall structural simplicity.
Solution Approach 2:
The slit in the installing portion serves multiple functions: it guides the external thread member during installation, allows for position adjustment, and maintains structural integrity. This multi-functional design enables adjustability without significantly increasing device complexity.
Data Source
AI summary
The roof-installed object securing device includes a flat plate-like securing roof member that is mounted on a roof structural member and has a through-hole penetrating through the securing roof member, a securing member having a flat plate-like mounting piece that made to abut against the roof structural member, an erected portion that is erected from the mounting piece through the through-hole, an installing portion that is formed on the upper end of the erected portion, and a slit that penetrates through the installing portion, an external thread member having a head that abuts against the lower surface of the installing portion and a bar-like external thread portion extending upward from the head through the slit, and a cover member through which the external thread portion penetrates and that covers the through-hole. A roof-installed object is secured onto the external thread portion extending upward from the cover member.