Rebar Binding Machine Control to Prevent Wire Loosening
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Solution Overview
Problem
Existing reinforcing bar binding machines often experience wire loosening during the twisting process, leading to deviations in the position of reinforcing bars, which compromises the stability of concrete structures.
Innovation Solution
A binding machine with a control unit that regulates the rotation of a wire engaging body, using a rotation regulation part and check members to determine the optimal stopping point of the motor, thereby minimizing reverse rotation and maintaining the twisted wire's tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor is stopped at a position where the distance from the projection to the stopper is distant, then the wire engaging body can rotate freely during twisting, but the twisted wire is highly likely to be loosened
Solution Approach 1:
The control unit calculates the optimal stopping position in advance based on the detected position of the wire engaging body and the regulation position of the rotation regulation part. By stopping the motor at this pre-calculated position, the system ensures that the wire is tightly bound without loosening, while still allowing sufficient rotation freedom during the twisting process.
Solution Approach 2:
The system detects the position of the wire engaging body and the regulation position of the rotation regulation part, then uses this feedback information to calculate and control the motor stopping position. This closed-loop control ensures that the motor stops at the optimal position that prevents wire loosening while maintaining operation smoothness.
2Reliability
If the motor is controlled to stop at the optimal position, then the twisted wire is prevented from loosening, but the control system becomes more complex
Solution Approach 1:
The patent replaces complex mechanical positioning mechanisms with a control unit that calculates the optimal stopping position based on detected positions. This substitution of mechanical complexity with computational logic simplifies the overall system while maintaining high reliability in preventing wire loosening.
3Reliability
If the rotation of the wire engaging body is regulated throughout the entire process, then the wire remains tight, but the twisting operation cannot be completed
Solution Approach 1:
The rotation regulation part dynamically adjusts its regulation function based on the motor's rotation angle. During the twisting operation, the wire engaging body is allowed to rotate freely to complete the binding. After the operation, the regulation part engages to prevent loosening. This dynamic adjustment ensures both productive operation and reliable results.
Solution Approach 2:
The rotation regulation part operates periodically - remaining disengaged during the twisting phase to allow rotation, then engaging after the twisting is complete to prevent loosening. This periodic action pattern ensures that the wire is tightly bound without interfering with the twisting operation.
Data Source
AI summary
A binding machine includes: a wire feeding unit; a curl forming unit; a cutting unit; a binding unit; a motor; and a control unit. The binding unit includes: a rotary shaft to be driven by the motor; a wire engaging body configured to engage the wire and to rotate together with the rotary shaft, thereby twisting the wire; and a rotation regulation part configured to regulate rotation of the wire engaging body. The control unit is configured to control stop of the motor rotating in a direction of twisting the wire, based on a position in a rotation direction of the wire engaging body and a position at which the rotation of the wire engaging body can be regulated by the rotation regulation part.