Binding Machine Cutter Structure to Maintain Wire Cutting Phase Difference
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Solution Overview
Problem
Existing reinforcing bar binding machines experience increased load during wire cutting operations due to wear of the step portion between blade parts, leading to a phase difference in cutting timings and inefficiencies as the number of wire cuttings increases.
Innovation Solution
A binding machine design with a cutting unit featuring a pair of blade parts and a recessed second butting portion, where the second butting portion is positioned behind the first butting portion along the moving direction of the blades, and a regulation portion to control the movement of the first wire, ensuring consistent phase difference and reduced load by starting cutting of one wire before the other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a step portion is provided between blade parts to delay cutting of parallel wires, then load reduction during wire cutting is achieved, but the step portion wears out over time causing loss of cutting phase difference
Solution Approach 1:
A regulation portion is introduced as an intermediary element between the first wire and the second butting portion. This regulation portion controls the movement of the first wire in the direction from the first butting portion toward the second butting portion, preventing direct contact between the first wire and the second butting portion that would cause wear. The regulation portion thus mediates the interaction to maintain the step portion's function over time.
Solution Approach 2:
The regulation portion is positioned in advance between the first butting portion and the step portion to preemptively prevent wear of the step portion. By regulating the first wire's movement before it can contact the second butting portion, the design ensures the cutting phase difference is maintained from the outset and throughout operation.
2Productivity
If the step portion wears due to increased wire cutting operations, then the phase difference in cutting timings is lost and cuttings start at substantially the same time, causing increased load
Solution Approach 1:
The regulation portion serves as a protective intermediary that prevents direct contact between the first wire and the second butting portion. This mediation prevents wear accumulation even during increased wire cutting operations, ensuring the step portion maintains its function of creating phase difference in cutting timings throughout extended use.
Solution Approach 2:
The regulation portion provides beforehand protection against wear of the step portion. By preventing direct contact between the first wire and the second butting portion from the beginning, it cushions against the harmful effects of repeated wire cutting operations, ensuring consistent cutting phase difference is maintained even during high-volume operations.
Data Source
AI summary
A binding machine including a wire feeding unit, a cutting unit, and a binding unit. The cutting unit includes a pair of blade parts that sandwiches and cuts a first wire and a second wire therebetween, a first butting portion against which the first wire is butted by relative movement of the pair of blades, and a second butting portion against which the second wire is butted. The cutting unit has a step portion provided between the first butting portion and the second butting portion by recessing the second butting portion with respect to the first butting portion along a moving direction of the pair of blade parts. The cutting unit has a regulation portion that regulates movement of the first wire in a direction from the first butting portion toward the second butting portion and provided between the first butting portion and the step portion.