Binding Machine Wire Draw-In Guide for Variable Entry Angles
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Solution Overview
Problem
Existing binding machines face difficulties in reliably feeding wires due to increased resistance caused by varying entry angles, which prevents consistent wire feeding to the binding part.
Innovation Solution
The binding machine incorporates a draw-in guide with a guiding facilitation part and a guiding concave portion that adjusts the wire's feeding path, allowing it to enter regardless of the entry angle, ensuring reliable wire feeding to the binding part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the entry angle of the wire entering the guide is increased, then the wire can be guided more effectively to the binding part, but the resistance due to friction of the wire sliding along the wall surface is increased and the wire cannot be fed
Solution Approach 1:
The guide structure is modified by changing geometric parameters: adding a guiding facilitation part that applies force to change the wire's feeding path, and providing a guiding concave portion that receives the expanding wire. These parameter changes allow the wire to be guided effectively while reducing friction resistance and enabling reliable feeding regardless of entry angle.
Solution Approach 2:
The guiding facilitation part acts as an intermediary element between the wire and the guide structure. It comes into contact with the wire from the radially outer side and applies a force that changes the wire's feeding path, mediating the interaction to reduce friction while maintaining guiding effectiveness.
2Productivity
If a guide with gradually narrowing wall surfaces is used to guide the wire to the binding part, then the wire can be directed to the binding part, but when the contact angle increases, friction resistance increases and wire feeding fails
Solution Approach 1:
The guide structure is modified by changing geometric parameters: adding a guiding facilitation part that applies force to change the wire's feeding path, and providing a guiding concave portion that receives the expanding wire. These parameter changes allow the wire to be guided effectively while reducing friction resistance and enabling reliable feeding regardless of entry angle.
Solution Approach 2:
The wire's natural expansion tendency when entering the guide, which previously caused increased friction and feeding failure, is converted into a beneficial effect. The guiding concave portion is designed to receive the wire as it expands, and the guiding facilitation part uses this expansion to apply force that changes the feeding path, transforming the harmful friction effect into a mechanism that ensures reliable feeding.
Data Source
AI summary
A binding machine includes: a wire feeder; a binding part configured to twist the wire wound around the object to be bound; a curl guide configured to curl the wire fed by the wire feeder; and an draw-in guide configured to guide the wire curled by the curl guide to the binding part, in which the draw-in guide includes a guiding facilitation part that comes into contact with the wire from a radially outer side of a loop that is formed by the wire curled by the curl guide, and applies, to the wire, a force that changes a feeding path of the wire, and a guiding concave portion, provided on a downstream side of the guiding facilitation part in a feeding direction of the wire, into which the wire, expanding toward the radially outer side of the loop, enters.