Rafter Angle Square Clamp Stand With Self-Compressing Tension Base

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Solution Overview

Problem

Existing door clamp stands are not versatile, efficient, easy to use, or economical to manufacture, particularly for rafter angle square applications, and lack the ability to adapt to cylindrical objects.

Innovation Solution

A rafter angle square door clamp stand system that functions like a truss, using a horizontal tension base suspended by rotatable support members with 'T' shaped slots, allowing rafter angle squares to compress and hold doors upright, and can be converted to support cylindrical objects by reversing the angle squares' positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional upstanding clamp members are used, then the structure is simple to manufacture, but the device lacks versatility and cannot adapt to cylindrical objects

Engineering Contradiction:
Improveadaptability to different work pieces including cylindrical objectsVSAvoidstructural complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The clamp stand is designed with a base that can function in multiple configurations: it can clamp doors and panels in upright positions, and it can also be inverted to support cylindrical objects horizontally. The same base structure serves both functions by simply reversing the position of the angle squares, eliminating the need for separate devices for different work piece types.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The angle squares are made slideable within the T-shaped slots of the base, allowing dynamic adjustment of their positions. This enables the device to adapt to different work piece widths and types. The slideable mechanism allows the angle squares to move to optimal positions for clamping doors or supporting cylindrical objects, providing versatility without adding complex adjustment mechanisms.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If swinging, slideable, or lever operated components are used, then the ease of operation is improved, but the manufacturing cost and complexity increase

Engineering Contradiction:
Improveease of clamping operationVSAvoidmanufacturing economy
Core Design Contradiction:
Ease of operationVSEase of manufacture

Solution Approach 1:

The clamp stand utilizes the weight of the door or work piece itself to generate the clamping force. As the door is placed on the base, its weight causes the base to flex downward, which automatically compresses the angle squares against the door edges, creating the clamp. This self-clamping mechanism eliminates the need for separate operating components like swings, levers, or slides, maintaining manufacturing simplicity while achieving ease of operation.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The natural downward flexing of the base under the door's weight, which could be considered a deformation or instability, is converted into a beneficial clamping force. This flexing action causes the angle squares to compress against the door, creating secure clamping without requiring additional mechanical components. The potential harm of base flexing is transformed into the useful clamping action.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

3Strength

If the base is rigid and fixed, then the manufacturing precision is maintained, but the ability to flex and compress the angle squares is reduced

Engineering Contradiction:
Improvebase structural strengthVSAvoidbase flexibility for compression
Core Design Contradiction:
StrengthVSAdaptability or versatility

Solution Approach 1:

The base is designed with differentiated local properties: the overall base structure maintains sufficient rigidity to support work pieces, while specific portions of the base are designed to flex downward when loaded. This localized flexibility allows the angle squares to be compressed against the work piece, while the rest of the base remains structurally sound. The T-shaped slots are also designed with specific geometric properties that allow controlled movement of the angle squares.

Inventive Principle:
Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system provides a unique, versatile, and efficient method for clamping doors and cylindrical objects, ensuring stability and ease of use while being economical to produce and simple to store.

Implementation Method 1

The weight of the door or similar elongated panel on the tension base causes the base to flex downward, and the rafter squares to compress holding the door in an upright horizontal position

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS10005173B2Rafter angle square door clamp stand system
Publication Date: 2018.06.26 FUREY CHARLES H
  • US10005173B2 patent drawing
  • US10005173B2 patent drawing
  • US10005173B2 patent drawing

AI summary

A rafter angle square door clamp stand system functions like a truss, utilizing tension and compression. A horizontal tension base is suspended off of the ground by rotatable support members, one at each end of the base. The tension base has a “T” shaped slot that runs the length of the base. Two rafter angle squares, each having a “T” shaped member, slide into the slot of the base, one from each end of the base, with the vertical edges of the angle squares facing each other. The weight of the door on the tension base causes the base to flex downward, and the rafter squares to compress, holding the door in an upright position. Stop elements prevent the angle squares from moving backwards when the door is compressed and clamped. The system can be converted to support cylindrical objects, by reversing the positions of the angle squares.