Reinforcing Bar Binding Machine Tension Control
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Solution Overview
Problem
Existing binding machines for reinforcing bars struggle to maintain wire tension effectively, leading to loosening of wires before twisting, which compromises the binding process and requires additional motor output, potentially causing unnecessary wear and inefficiency.
Innovation Solution
A binding machine equipped with a wire feeding unit, curl forming unit, cutting unit, and a binding unit that applies tension to the wire using a rotary shaft and tension applying part, ensuring the wire is twisted with a force between 10% and 50% of its maximum tensile load, preventing loosening and ensuring close contact with the reinforcing bars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wire is wound on the reinforcing bars without sufficient tension, then the wire can be easily wound, but the wire loosens before twisting and cannot closely contact the reinforcing bars
Solution Approach 1:
The patent applies preliminary action by pre-tensioning the wire before the winding operation. The tension applying part applies tension to the wire in advance, ensuring that when the wire is wound around the reinforcing bars, it maintains sufficient tension and does not loosen, thereby achieving both easy winding and reliable contact.
2Reliability
If the wire is tightly wound on the reinforcing bars, then the wire contact is reliable, but the wire cannot be twisted effectively due to excessive tension
Solution Approach 1:
The patent applies dynamics by making the tension applying part adjustable or controllable during the operation. The tension can be dynamically adjusted to appropriate levels for different stages of the binding process, allowing the wire to be tightly wound first, then twisted effectively when tension is reduced or modified.
3Reliability
If the binding machine uses high motor output to apply sufficient tension, then the wire can be tightly bound, but unnecessary wear occurs and efficiency decreases
Solution Approach 1:
The patent applies self-service by using a dedicated tension applying part that utilizes the existing wire tensioning mechanism or a separate lightweight mechanism to apply sufficient tension. This eliminates the need for the main motor to provide excessive output, reducing energy waste and unnecessary wear while achieving the required binding strength.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses wire loosening before twisting, ensures close contact with the reinforcing bars, and reduces unnecessary motor output, enhancing the binding process and device durability.
Implementation Method 1
a tension applying part configured to apply tension to the wire to be cut at the cutting unit with a force higher than a force applied in a loosening direction of the wire wound on the to-be-bound object
Implementation Method 2
a binding unit configured to twist the wire wound on the to-be-bound object and cut by the cutting unit
Data Source
AI summary
A binding machine includes: a wire feeding unit configured to feed a wire; a curl forming unit configured to form a path along which the wire fed by the wire feeding unit is to be wound around a to-be-bound object; a butting part against which the to-be-bound object is to be butted; a cutting unit configured to cut the wire wound on the to-be-bound object; a binding unit configured to twist the wire wound on the to-be-bound object and cut by the cutting unit; and a tension applying part configured to apply tension to the wire to be cut at the cutting unit with a force higher than a force applied in a loosening direction of the wire wound on the to-be-bound object.