Rebar Tying Tool With High-Strength Wire for Tight Binding
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Solution Overview
Problem
Existing rebar tying tools face challenges in tightly binding reinforcing bars due to the risk of wire fracture and deformation during twisting, leading to loose ties.
Innovation Solution
The rebar tying tool employs a wire with a maximum tensile load of 1,050 N or more, a yield-point load of 700 N or more, and a diameter of 1.6 mm or more, combined with a twisting mechanism that ensures tight contact and minimizes deformation, allowing for robust and secure binding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a strong force is applied to twist the terminal ends of the wire to tightly bind the rebars, then the binding strength is improved, but the wire may fracture due to insufficient tensile load capacity
Solution Approach 1:
The patent changes the parameter of wire tensile load capacity by specifying a minimum overall maximum tensile load of 1,050 N for the wire configuration. This parameter change allows the wire to withstand the strong twisting forces required for tight binding while preventing fracture, thus resolving the contradiction between binding strength and wire reliability.
2Reliability
If the overall maximum tensile load of the wire is increased to prevent fracture during twisting, then wire reliability is improved, but the wire may deform adversely under excessive load
Solution Approach 1:
The patent establishes an optimal parameter range for the overall maximum tensile load (1,050 N or more) that balances two opposing requirements: sufficient load capacity to prevent wire fracture during twisting, yet not so excessive that the wire deforms adversely. This parameter optimization resolves the contradiction between wire reliability and structural stability.
3Reliability
If a wire with higher tensile load capacity is used to ensure tight binding, then the binding security is improved, but the motive-power source may be subjected to excessive load
Solution Approach 1:
The patent specifies that the overall maximum tensile load should be 1,050 N or more, which provides sufficient binding security while preventing excessive load on the motive-power source. This parameter setting optimizes the balance between binding reliability and motor load protection.
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 tool effectively reduces the likelihood of wire fracture and deformation, enabling tighter and more secure binding of reinforcing bars without excessive load on the motive-power source.
Implementation Method 1
to twist terminal ends of the wire that is curled or looped around two or more rebars with a strong force
Implementation Method 2
the terminal ends of the wire that is looped around the rebars are twisted with a strong force
Data Source
AI summary
A rebar tying tool ties together two or more rebars using a wire. The rebar tying tool may include: a reel having the wire wound on a bobbin; a reel-holding part configured to hold the reel in a rotatable manner; a feed part configured to advance the wire from the reel by a number of turns of the wire around the rebars; and a twisting part configured to twist the wire after the number of turns of the wire has been wound around the rebars. The wire preferably has a maximum tensile load of at least 1000 N and a yield-point load of at least 550 N.