Portable Doweling Jig With Fixed Bores for Precise Joint Alignment
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Solution Overview
Problem
Existing doweling jigs are often large and heavy, complex, imprecise, and limited in functionality, making it difficult to create edge-to-surface, edge-to-edge, and surface-to-surface joints efficiently and accurately.
Innovation Solution
A portable, compact doweling jig with a cuboidal body and fixed bores that allows for precise drilling of dowel receiving holes, accommodating standard and nonstandard workpieces without moving parts, enabling the creation of all three standard dowel joints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If existing doweling jigs are used, then dowel receiving holes can be drilled, but the devices are large and heavy, making them difficult to carry
Solution Approach 1:
The doweling jig is divided into two separate components: a body member and a base member. The body member contains the guide bores and can be carried separately, while the base member provides stability during use. This segmentation allows the main functional component to be lightweight and portable while still providing stable operation when assembled.
Solution Approach 2:
The heavy base member is separated from the main body and can be left at the work location, allowing the body member to be easily carried to different work sites. The base member provides the necessary stability and support during drilling operations, while the body member remains portable.
2Ease of operation
If existing doweling jigs are used, then dowel receiving holes can be drilled, but the devices have multiple moving parts and require cumbersome adjustments
Solution Approach 1:
The guide bores are pre-formed in the body member at precise locations and angles, eliminating the need for adjustments during use. The fixed geometry of the guide bores ensures consistent dowel hole placement without requiring moving parts or complex setup procedures.
Solution Approach 2:
Instead of using adjustable guide bores that move to accommodate different workpiece thicknesses, the invention uses fixed guide bores combined with a base member that provides the necessary support and positioning. This inverted approach eliminates moving parts while maintaining versatility through the separate body and base member design.
3Measurement precision
If existing doweling jigs are used, then dowel receiving holes can be drilled, but the devices lack precision in positioning
Solution Approach 1:
The separation of the body member (containing precise guide bores) from the base member allows the guide bores to be precisely formed and positioned in the body member, while the base member provides stable support during drilling. This segmentation enables high positioning accuracy without compromising operational stability.
Solution Approach 2:
The base member acts as an intermediary that provides stable support during drilling operations, allowing the guide bores in the body member to maintain precise positioning. The base member's stability compensates for any potential movement, ensuring accurate dowel hole placement.
4Adaptability or versatility
If existing doweling jigs are used, then some dowel joint types can be created, but the devices are limited in functionality
Solution Approach 1:
The body member with its multiple guide bores configured at different angles and positions can accommodate all three standard dowel joint types (edge-to-edge, edge-to-surface, and surface-to-surface). The fixed multi-functional design eliminates the need for interchangeable components while providing versatility across different joint configurations.
Data Source
AI summary
A portable doweling jig includes a generally cuboidal body comprising four sets of bores that facilitate the drilling of precisely positioned holes into workpieces for receiving standard-sized construction dowels. Despite the absence of moving parts, the present invention accommodates dowels of different diameters, and also workpieces of both standard and nonstandard thicknesses. Furthermore, the present invention makes possible the creation of three types of dowel joints: edge-to-surface, edge-to-edge, and surface-to-surface.