Collapsible Downspout Plug for Roofing Debris Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices fail to effectively prevent roofing materials from entering and clogging downspouts during roof installation or replacement, requiring climbers to clear debris from elevated positions.
Innovation Solution
A collapsible plug made from flexible 1/32″ plastic sheeting with a rectangular body, featuring right and left tabs with engagement mechanisms, that can be rolled and securely inserted into downspouts to block debris entry, ensuring visibility and easy removal post-project.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a plug is placed at the downspout inlet to prevent debris entry, then debris prevention is improved, but the plug becomes difficult to remove without climbing to the rain gutter
Solution Approach 1:
The plug is divided into a body portion and a retrieval loop portion. The retrieval loop extends from the body and can be accessed from ground level, allowing the plug to be segmented into a functional blocking portion and a retrieval portion. This enables debris prevention at the downspout inlet while maintaining ease of removal from ground level without climbing.
Solution Approach 2:
The retrieval loop acts as an intermediary element that connects the plug body (which blocks debris) to the user's hand at ground level. This intermediary structure transfers the blocking function from the downspout inlet to a retrievable element accessible from below, resolving the contradiction between effective blocking and easy removal.
2Object-affected harmful factors
If a rigid blocking device is used to prevent roofing materials from entering downspouts, then debris prevention is improved, but the device complexity and difficulty of installation increase
Solution Approach 1:
The plug is designed as a flexible, collapsible device that can be compressed into a small package for easy transport and installation. When inserted into the downspout, it expands to its full size to effectively block roofing materials. This dynamic transformation from compact to expanded state reduces installation complexity while maintaining effective debris prevention.
Solution Approach 2:
The plug body is constructed from flexible material that allows it to be collapsed into a compact form for easy handling and insertion. Once in place, the flexible material expands to create an effective barrier against roofing materials. This flexibility reduces device complexity during installation while maintaining blocking effectiveness.
3Object-affected harmful factors
If a large visible plug is used to block downspout inlet, then debris prevention is improved, but the plug becomes difficult to store and transport
Solution Approach 1:
The plug is designed to collapse into a compact, nested form that fits within a small storage volume. The body and retrieval loop can be compressed together, allowing the large functional plug to be stored in a convenient size for transport to job sites. When deployed, it expands to its full blocking size, effectively preventing debris entry.
Solution Approach 2:
The plug transitions from a compact stored state to an expanded functional state. In storage, it occupies minimal volume; during installation and use, it expands to create a large effective blocking surface. This dynamic volume change resolves the contradiction between blocking effectiveness and storage convenience.
Data Source
AI summary
A one-piece shield for temporarily covering the upper inlet of a downspout. The shield includes a single sheet of resilient material, with a pair of tabs that cooperate with a slot in the sheet. The sheet is rolled up to create a tubular portion. One of the tabs is turned into the tubular portion to block the passage into the tubular portion, and the other tab cooperates with the slot to keep the device rolled up, so that the tubular portion blocks entry of debris into the downspout. The device is unrolled after use, and stored flat.