Binding Machine Lid Locking to Prevent Wire Reel Buckling
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Solution Overview
Problem
Existing reinforcing bar binding machines are prone to malfunctions due to wire buckling in the magazine, causing gaps between the lid and accommodation part, which can lead to reel movement and operational issues.
Innovation Solution
The binding machine incorporates a regulating mechanism that maintains the lid part in a closed state by using multiple urging members and lock members to prevent the lid from opening, even when pushed by the reel or wire, ensuring the reel remains stable during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wire is fed in reverse direction to wind around reinforcing bar, then the wire winding function is improved, but the wire may cause buckling and push the lid part in opening direction
Solution Approach 1:
The patent applies preliminary anti-action by providing a lock lever that preemptively prevents the lid part from opening when the wire pushes it during reverse feeding operation. The lock lever is positioned to engage with the lid part before any pushing force can cause opening, thus counteracting the potential harmful effect in advance.
Solution Approach 2:
The lock lever acts as an intermediary element between the lid part and the wire feeding mechanism. It mediates the interaction by physically blocking the lid part from moving when pushed by the wire, transferring the force to the case structure rather than allowing lid opening.
2Force
If the lock lever presses the lid part at one location, then the lid closing force is improved, but gaps may occur at portions not pressed by the lock lever
Solution Approach 1:
The patent applies segmentation by dividing the lid part into multiple pressing portions at different locations. Instead of relying on a single lock lever, the lid part has multiple distinct areas (first pressing portion and second pressing portion) that can be engaged by lock levers to distribute the closing force across multiple points, preventing gaps at any single location.
Solution Approach 2:
The patent applies local quality by providing different pressing portions at specific locations on the lid part, each tailored to address gap formation at that particular area. The lock levers are positioned to press specific local regions, ensuring uniform contact and preventing localized gaps while maintaining overall lid stability.
3Reliability
If the lid part is pushed in opening direction by reel or wire, then the reel may move in axis direction of rotation, but the regulating mechanism prevents gap occurrence
Solution Approach 1:
The patent applies self-service by designing the lock lever mechanism to automatically engage with the lid part when the reel or wire pushes it in the opening direction. The lock lever is positioned and dimensioned to automatically activate and prevent further opening without requiring external control systems, maintaining reliability while minimizing additional complexity.
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A binding machine includes a magazine including an accommodation part configured to accommodate a reel, and a lid part configured to cover the accommodation part to be openable and closable, a wire feeding unit configured to feed the wire in a forward direction in which the wire is pulled out from the magazine and in a reverse direction in which the wire is pulled back to the magazine, a curl forming unit configured to form a path along which the wire fed in the forward direction is to be wound around an object, a binding unit configured to twist the wire fed in the reverse direction and wound on the object, and a plurality of regulating portions configured to regulate opening of the lid part from a closed state in which the accommodation part is closed by the lid.