Gantry Wall Frame Assembly for Faster Off-Site Lumber Joining
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Solution Overview
Problem
The construction industry faces challenges with rising labor costs and the need for more time and cost-efficient construction methods, particularly in assembling wood frame structures, where on-site construction errors are common and specialized labor is required.
Innovation Solution
An automated wall frame assembly system comprising a conveyor system, gantry assembly, and fastener tools to transport and attach frame members, including a method for assembling wall frames using an advancer assembly and gantry assembly to automate the attachment of lumber components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated equipment is used to assemble lumber components, then productivity and manufacturing precision are improved, but device complexity increases
Solution Approach 1:
The automated wall frame assembly system is divided into distinct functional modules: an advancer assembly that transports frame members along an assembly axis, a gantry assembly positioned above the advancer, and various attachment mechanisms. This segmentation allows each component to perform a specific function efficiently while maintaining overall system productivity and managing complexity through modular design.
Solution Approach 2:
The system preassembles lumber components off-site at a fabrication facility before transporting them to the construction location. Wall panels, roof trusses, and other structural elements are prepared in advance with precise measurements and connections, eliminating the need for on-site measuring, sawing, and assembly operations. This preliminary action significantly improves construction speed while the standardized preassembly process manages system complexity.
2Manufacturing precision
If preassembly is performed off-site, then manufacturing precision is improved, but loss of time in transportation occurs
Solution Approach 1:
Lumber components are preassembled into complete wall frames, wall panels, and roof trusses at a fabrication facility with high manufacturing precision. The automated assembly system uses the advancer assembly to precisely position and attach frame members, ensuring accurate alignment and connections. These preassembled modules are then transported to the construction site as complete units, eliminating the need for on-site measuring and cutting operations.
Solution Approach 2:
The construction project is segmented into modular components (wall panels, roof trusses, floor systems) that can be independently fabricated with high precision at the off-site facility. Each module is designed as a complete, self-contained unit that requires minimal on-site assembly, reducing both transportation time and on-site construction time while maintaining manufacturing precision.
3Manufacturing precision
If specialized labor is required for on-site construction, then manufacturing precision is improved, but productivity decreases due to labor costs
Solution Approach 1:
All precision assembly operations are performed in advance at the fabrication facility using automated equipment. The advancer assembly systematically transports and positions frame members, while the gantry assembly and attachment mechanisms precisely connect components. This preliminary action eliminates the need for specialized on-site labor, reducing labor costs and improving overall construction efficiency while maintaining high manufacturing precision through automated control systems.
Solution Approach 2:
Manual operations by specialized laborers are replaced with an automated mechanical system consisting of the advancer assembly for transportation, the gantry assembly for positioning, and automated attachment mechanisms for connections. This substitution eliminates the need for skilled on-site workers while maintaining or improving assembly precision through consistent automated processes, thereby increasing productivity and reducing labor costs.
Data Source
AI summary
An automated wall frame assembly system for use in assembling a wall frame includes an advancer assembly including a conveyor system configured to transport first frame members along an assembly axis to an output of the conveyor system. A frame unit is disposed generally at the output of the conveyor system and is configured to receive the first frame members from the conveyor system and attach a second frame member to the first frame members. A gantry assembly is disposed above the advancer assembly. The gantry assembly includes a gantry frame and at least one gantry tool movably attached to the gantry frame. The gantry tool is operable to deliver the second frame member to the advancer assembly from a location above the advancer assembly for being attached to the first frame members.