Reinforcing Bar Binding Machine Contact Switch Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing binding machines for reinforcing bars often result in weakened binding force due to gaps between the bars and the wire, either from the contact member abutting against the guide or the reinforcing bars deviating from the twisting position, leading to inadequate binding strength.
Innovation Solution
A binding machine design featuring a contact switch unit with an abutting portion positioned between the curl guide and leading guide, activated when the object to be bound abuts against it, ensuring the binding operation occurs in alignment with the axis of rotation, preventing deviation and maintaining binding strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the contact member is activated such that the distal end of the guide abuts against the member in the vicinity of the portion where the reinforcing bars are disposed, then the binding operation can be executed, but a gap is likely to be generated between the reinforcing bars and the wire, and the binding force is weakened
Solution Approach 1:
The contact member is repositioned from the distal end of the guide (longitudinal direction) to a location between the curl guide and leading guide, with protrusion in a direction perpendicular to the axis. This dimensional change allows the contact member to detect object position earlier in the binding path, ensuring the object is properly positioned before the wire twisting operation, thereby preventing gaps and maintaining binding force while still enabling the binding operation to execute.
2Ease of operation
If the contact member is activated such that the reinforcing bars abut against the guide, then the binding operation can be executed, but the position where the wire is twisted by the binding unit is deviated from the reinforcing bars, a gap is likely to be generated, and the binding force is weakened
Solution Approach 1:
The contact member is positioned to detect the object's presence and proper positioning before the wire twisting operation begins. By activating the contact switch unit when the object abuts against the abutting portion (which protrudes perpendicular to the axis between the guides), the system performs a preliminary position check that ensures the reinforcing bars are correctly aligned with the binding unit's twisting axis, preventing position deviation and maintaining both manufacturing precision and binding force.
3Ease of operation
If the abutting portion protrudes more from the body portion, then the contact switch unit can be activated more easily, but the object position may be detected too early or too late, causing alignment deviation
Solution Approach 1:
The protruding amount of the abutting portion is carefully controlled to be smaller than the protruding amounts of both the curl guide and leading guide along the axis. This parameter change ensures that the contact member activates at the optimal moment - when the object is properly positioned between the guides but before the wire twisting begins. This precise parameter setting balances ease of activation with positioning accuracy, preventing both early activation (which would cause alignment deviation) and late activation (which would compromise binding force).
Data Source
AI summary
A binding machine includes a wire feeding unit, a binding unit configured to rotate while locking the wire wound around the reinforcing bars, whereby to twist the wire, a curl guide configured to curl the fed wire, a leading guide configured to lead the curled wire to the binding unit, and a contact switch unit configured to be activated with the reinforcing bars abutting against the contact switch unit, in which the contact switch unit includes an abutting portion against which the reinforcing bars abut, and the abutting portion is provided between the curl guide and the leading guide and is provided on at least one side relative to an axis of rotation operation of the binding unit in a direction perpendicular to both a direction in which the curl guide and the leading guide are arranged.