Adjustable Doweling Jig with Simultaneous Bore Guide Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Contemporary doweling jigs are limited to predefined hole locations, requiring multiple fixturing operations and often resulting in mismatched dowel holes, which can lead to undesirable edges in joints, especially in flat surfaces like table tops.
Innovation Solution
An adjustable doweling jig with positionable bore guides relative to a base, allowing simultaneous adjustment of multiple bore guides using a single control, enabling precise centering and alignment of dowel holes across multiple workpieces in a single operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bore guides are arranged at fixed distances relative to a reference point, then the jig structure is simple and easy to manufacture, but the jig is limited to forming dowel holes at predefined locations and cannot accommodate different workpiece dimensions
Solution Approach 1:
The patent applies the dynamics principle by making the bore guide carrier movable relative to the base structure. The carrier can be adjusted to different positions along the base and locked in place, transforming the fixed bore guide arrangement into an adjustable one. This allows the same jig to accommodate different workpiece dimensions and create dowel holes at various locations without requiring multiple specialized jigs.
2Manufacturing precision
If the jig is removed and remounted on subsequent workpieces, then the jig can operate on multiple workpieces, but the dowel holes may not properly match up creating noticeable edges at joints
Solution Approach 1:
The patent implements universality by designing the base structure with multiple reference points that can accommodate different workpiece configurations. The adjustable bore guide carrier can be positioned and locked to maintain consistent spacing relationships across multiple workpieces, allowing the jig to function universally for various board widths while maintaining precise dowel hole alignment without remounting.
3Measurement precision
If multiple bore guides are adjusted individually, then each bore guide can be precisely positioned, but the adjustment process requires multiple controls and increases operation time
Solution Approach 1:
The patent applies the merging principle by coupling multiple bore guides to a single adjustable carrier. When the carrier is moved along the base and locked, all bore guides on that carrier are adjusted simultaneously to their new positions. This combining of adjustment functions reduces the number of independent controls needed and simplifies the adjustment process while maintaining precise positioning capability.
Data Source
AI summary
An adjustable doweling jig is provided. The adjustable doweling jig has a pair of bore guide carriers that are symmetrically and simultaneously adjustable relative to a base structure of the doweling jig. The bore guide carriers carry a plurality of bore guides such that dowel holes can be placed using the bore guides at a broad range of locations, limited only by the size of the jig.