Reinforcing Bar Binding Machine Wire Tension Control
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Solution Overview
Problem
Existing binding machines for reinforcing bars struggle to maintain wire tension after cutting, leading to loosening and inadequate contact with the bars during the twisting process.
Innovation Solution
A binding machine with a wire feeder, curl forming part, cutter, and binding part that includes a wire locking body and rotating shaft to lock and twist the wire, using a movable wire holding part to bend and secure the wire before cutting, ensuring it remains in contact with the reinforcing bars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wire is cut after winding around the reinforcing bars, then the wire can be prepared for twisting, but the wire loosens and cannot maintain close contact with the reinforcing bars
Solution Approach 1:
The wire holding part performs preliminary action by holding the wire in tension state before the cutting operation. The first member and second member clamp the wire to maintain its tension, preventing loosening that would occur after cutting. This preliminary constraint ensures the wire remains ready for subsequent twisting without losing contact with the reinforcing bars.
Solution Approach 2:
The wire holding part applies preliminary anti-action by counteracting the loosening force that would naturally occur after cutting. By maintaining clamping force on the wire between the first and second members, the system pre-compensates for the loss of tension, preventing the harmful effect of wire slackening before the twisting operation begins.
2Force
If a twisting means with coil spring bias is used to apply tension to the wire, then binding force is enhanced, but the wire may loosen after cutting and before twisting
Solution Approach 1:
The wire holding part executes preliminary action by securing the wire in tension before the cutting operation. The first member and second member clamp the wire to maintain its taut state, ensuring that when the wire is cut and subsequently twisted by the twisting means, the binding force can be effectively applied without initial loosening that would compromise reliability.
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 and maintains close contact with the reinforcing bars during twisting, enhancing the binding force and stability of the wire-wound structure.
Implementation Method 1
the wire holding part is configured to bend the wire, which is fed by the wire feeder in the another direction and wound on the object to be bound, in an axial direction of the rotating shaft by the relative movement of the first member and the second member approaching each other
Implementation Method 2
the twisting means is biased by a coil spring in the rearward direction which is the direction of separating away from the reinforcing bar to thus apply tension to the wire, while twisting the wire
Data Source
AI summary
A binding machine includes a wire feeder, a curl forming part, a cutter, and a binding part configured to twist the wire wound on the object and cut by the cutter. The binding part includes a wire locking body to which the wire is locked; a rotating shaft configured to operate the wire locking body; and a wire holding part including a first member and a second member. The wire holding part is configured to bend the wire wound on the object in an axial direction of the rotating shaft by the relative movement of the first member and the second member approaching each other, and to hold the wire. The cutter is provided in a wire feeding path between the wire feeder and the wire holding part, and is configured to cut the wire after the wire is held by the wire holding part.