Rebar Binding Gripper Structure for Compact Wire Twisting
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Solution Overview
Problem
Existing reinforcing bar binding machines face challenges in miniaturization due to complex structures and require mechanisms for rotating gripping members, which complicate the design and increase size.
Innovation Solution
A binding machine with a pair of gripping members rotatably supported by a shaft, allowing for movement in a direction orthogonal to the shaft, enabling the gripping and twisting of wires with a simple structure and reduced lateral dimension, facilitating miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the first movable gripping member and the second movable gripping member are opened and closed by parallel movement, then the gripping operation is simple, but the lateral dimension increases making miniaturization difficult
Solution Approach 1:
Instead of moving the gripping members in parallel (conventional approach), the patent inverts the approach by having them rotate about a shaft as a fulcrum. This inversion changes the movement from linear parallel displacement to rotational motion, allowing the gripping members to open and close without increasing lateral dimension, thus enabling miniaturization while maintaining gripping functionality
2Length of moving object
If the first movable gripping member and the second movable gripping member are opened and closed by rotating operation with a shaft as a fulcrum, then miniaturization is enabled, but a mechanism for rotating the gripping members is required making the structure complicated
Solution Approach 1:
The patent merges the rotation mechanism for both movable gripping members into a single integrated structure where both members share a common shaft as fulcrum. This merging eliminates the need for separate rotation mechanisms for each gripping member, reducing structural complexity while enabling miniaturization through rotational motion
Solution Approach 2:
The shaft serving as a fulcrum for both gripping members performs multiple functions: it acts as the rotation axis for the first movable gripping member, the rotation axis for the second movable gripping member, and provides a common reference point for coordinated motion. This multi-functionality reduces the number of separate components needed, simplifying the overall structure
Data Source
AI summary
A reinforcing bar binding machine capable of reliably performing a wire gripping operation includes a first movable gripping member that is displaced in a direction to contact with and separate from one side of a fixed gripping member and a second movable gripping member that is displaced in a direction to contact with and separate from the other side of the fixed gripping member. A bending portion brings the first movable gripping member and the second movable gripping member into and out of contact with the fixed gripping member. The fixed gripping member includes a shaft that rotatably supports the first movable gripping member and the second movable gripping member. Further, the bending portion includes an opening and closing pin that pushes an opening and closing guide hole provided in the first movable gripping member, and an opening and closing guide hole provided in the second movable gripping member.