Rebar Binding Machine Wire Positioning Guide
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Solution Overview
Problem
Existing binding machines for reinforcing bars face challenges in maintaining wire position stability along the axial direction of a looped feeding path, leading to potential misalignment and increased machine size and weight when trying to accommodate larger wire diameters, which affects operability.
Innovation Solution
A binding machine design that includes a curl guide with a parallel guide portion where the gap between the second and third wire guides is longer than the wire diameter but shorter than twice the diameter, allowing wires to pass radially and stabilize their position, preventing misalignment and reducing the need for larger leading guides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the diameter of the looped feeding path is increased to accommodate larger wire diameters, then the wire can pass through the feeding path, but the positions of the wires along the axial direction become unstable and vary
Solution Approach 1:
The feeding path is divided into multiple guiding sections: a curl guide section that curls the wires, a parallel guide section that maintains parallel arrangement, and a leading guide section that leads to the binding portion. This segmentation allows each section to control wire position at different stages, preventing position variation even when the overall path diameter is large.
Solution Approach 2:
The parallel guide portion acts as an intermediary element between the curl guide and the leading guide. It specifically controls the axial position of wires by providing a guiding structure with a width between 1.5-2.0 times the wire diameter, ensuring stable wire arrangement before the wires enter the leading guide.
2Reliability
If the size of the leading guide is increased to ensure wire entry, then the wire can enter the leading guide, but the size and weight of the binding machine increase
Solution Approach 1:
The curl guide and parallel guide portion perform preliminary actions to arrange and position the wires in the radial direction before they reach the leading guide. This preliminary positioning ensures that wires enter the leading guide reliably without requiring the leading guide to be oversized, thereby reducing the overall machine size and weight.
3Strength
If a wire with large diameter is used to ensure binding strength, then the binding strength is improved, but the rigidity of the wire increases and a large force is required to bind reinforcing bars
Solution Approach 1:
The patent changes the dimensional arrangement of wires from axial direction to radial direction. By arranging multiple wires in the radial direction of the looped feeding path and using a curl guide to curl them, the system achieves stable wire positioning and reliable binding without requiring excessively large wire diameters, thus reducing the binding force needed while maintaining binding strength.
Data Source
AI summary
A binding machine includes: a wire feeding portion configured to feed a plurality of wires; a curl forming portion configured to constitute a looped feeding path for winding the plurality of wires fed by the wire feeding portion around a binding object; and a binding portion configured to twist the plurality of wires wound around the binding object. The curl forming portion includes: a curl guide configured to curl the plurality of wires fed by the wire feeding portion; and a leading guide configured to lead the plurality of wires curled by the curl guide to the binding portion. The curl guide is configured to allow the plurality of wires to pass therethrough while being arranged in a radial direction of the looped feeding path.