Rebar Binding Gripper Layout for Compact Wire Feeding
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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 simplified structure featuring a pair of gripping members rotatably supported by a shaft, where one end is movable towards and away from the other, allowing for wire feeding and twisting without the need for complex rotating mechanisms, utilizing a moving member that fits into a fitting portion to facilitate gripping and releasing the wire.
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:
The patent changes the movement direction of the gripping members from lateral parallel movement to longitudinal movement along the wire feeding direction. The movable gripping members are guided to move in the longitudinal direction by guide grooves, transforming the operation from a lateral dimension action to a longitudinal dimension action, thereby enabling miniaturization in the lateral dimension while maintaining simple gripping operation.
2Volume 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 fulcrum, then the gripping mechanism is compact, but the structure becomes complicated requiring rotation mechanisms
Solution Approach 1:
The patent replaces the rotational mechanical system with a linear mechanical system. Instead of using shafts as fulcrums for rotating the gripping members, the invention uses guide grooves to guide linear movement of the movable gripping members along the longitudinal direction. This substitution eliminates the need for complex rotation mechanisms while maintaining compact size.
3Stability of the object's composition
If guide members such as grooves or pins are used to guide parallel movement of gripping members, then the movement is constrained, but the lateral dimension increases
Solution Approach 1:
The patent repositions the guide grooves to constrain movement in the longitudinal direction rather than the lateral direction. The guide grooves are formed on the movable gripping members to guide their movement along the wire feeding direction (longitudinal axis). This dimensional reorientation allows effective movement constraint without increasing lateral dimension, enabling miniaturization.
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.