Offset Wire Feeding in Rebar Binding Machines
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Solution Overview
Problem
Existing reinforcing bar binding machines face issues with wire positioning stability as the diameter of the annular feeding path increases, leading to wire misalignment and potential operability problems due to the need for larger machine sizes and weights.
Innovation Solution
A binding machine design where the accommodating portion is offset with respect to the curl guide, allowing the curl guide to feed the wire in a specific direction, reducing wire displacement and enabling stable wire feeding even with larger diameters without increasing the leading guide size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the diameter of the annular feeding path is increased to accommodate larger diameter reinforcing bars, then the binding machine can handle larger objects, but the wire position varies along the axial direction and the machine size and weight increase
Solution Approach 1:
The wire is fed in advance from the accommodating portion through the curl guide before reaching the binding portion. The curl guide pre-forms the wire path and the wire feeding portion positions the wire accurately along the axial direction before the wire enters the annular feeding path, preventing position variation even when the diameter is large
Solution Approach 2:
The curl guide acts as an intermediary component between the wire accommodating portion and the binding portion. It mediates the wire transmission by curling the wire in advance and directing it through a controlled path, ensuring stable wire positioning regardless of the annular feeding path diameter
2Reliability
If the size of the leading guide is increased to allow the wire to enter properly, then the wire can enter the leading guide, but the size and weight of the binding machine increase
Solution Approach 1:
The wire feeding portion changes the feeding parameters by actively controlling the wire position along the axial direction. Instead of relying on a larger leading guide, the system uses controlled wire feeding to ensure the wire enters the leading guide correctly, allowing for a compact design
Solution Approach 2:
The wire is pre-positioned and pre-fed by the wire feeding portion before entering the leading guide. This preliminary action ensures proper wire alignment and entry without requiring an oversized leading guide, thereby maintaining compact machine dimensions
Data Source
AI summary
A binding machine includes: an accommodating portion configured to accommodate a wire; a wire feeding portion configured to feed the wire accommodated in the accommodating portion; a curl forming portion configured to constitute an annular feeding path for winding the wire fed by the wire feeding portion around an object to be bound; and a binding portion configured to twist the wire wound around the object to be bound. The curl forming portion includes a curl guide configured to curl the wire fed by the wire feeding portion, and a leading guide configured to lead the wire curled by the curl guide to the binding portion. The accommodating portion is disposed to be offset in one direction with respect to the curl guide. The curl guide is configured to feed out the wire toward the one direction.