Binding Machine Wire-Cutter Structure to Prevent End Clogging
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Solution Overview
Problem
Existing reinforcing bar binding machines face issues where the end portion of the cut wire can get caught and clogged between the curl guide and the cutter, or between the movable blade and the link member, due to wear on the engaging part of the movable blade.
Innovation Solution
The binding machine incorporates a wire feeding portion, a cutting portion, a first abutment portion, and a guide portion with a second abutment portion. The cutting portion includes a fixed blade and a movable blade with a second wire passage that guides the wire after cutting, and a guiding portion that blocks the space between the movable blade and the guide portion when the movable blade moves to the standby position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engaging part of the movable blade is formed at an acute angle to hold the wire end portion, then the wire can be firmly held initially, but repeated use causes gradual wear on the engaging part, making it unable to firmly hold the wire end portion
Solution Approach 1:
The patent divides the wire end holding function into two separate components: the existing engaging part of the movable blade and a newly added abutment portion. This segmentation allows the abutment portion to take over the primary load-bearing function of holding the wire end, while the engaging part maintains its wire-bending function. By distributing the functional requirements across two elements, the patent prevents excessive wear on any single component, thereby resolving the contradiction between initial holding reliability and long-term durability.
2Productivity
If the movable blade slides to cut the wire, then cutting function is achieved, but the wire end portion may be caught and clogged between the movable blade and the link member
Solution Approach 1:
The patent introduces an abutment portion as an intermediary element between the wire end portion and the movable blade assembly. This abutment portion serves as a mediator that guides and positions the wire end portion, preventing it from being caught between the movable blade and the link member during the cutting operation. The abutment portion acts as a protective intermediary that maintains proper wire alignment throughout the cutting cycle, thereby eliminating the clogging issue while preserving cutting efficiency.
3Device complexity
If no additional wire guidance structure is added, then the device complexity remains low, but the wire end portion cannot be effectively prevented from being caught and clogged
Solution Approach 1:
The abutment portion is designed with multi-functionality to minimize the increase in device complexity. It serves multiple purposes: guiding the wire end portion, preventing clogging between the movable blade and link member, and supporting the wire during the cutting operation. By consolidating these functions into a single component rather than adding multiple separate elements, the patent achieves effective wire end control while keeping the overall structural complexity increase minimal.
Data Source
AI summary
A binding machine comprises a cutting portion which cuts the wire, a fixed blade in which a first wire passage through which the wire passes is formed; and a movable blade in which a second wire passage through which the wire passes is formed. The movable blade includes a blade portion provided on one side of the second wire passage and a passage forming member provided on the other side of the second wire passage, the second wire passage includes a guiding portion for guiding the wire after cutting in a movement when the movable blade moves from the movement finish position to the standby position, and the guiding portion is protrudes in a direction of the guide portion and blocks a portion between the movable blade and the guide portion in a non-wire-passing-through manner when the movable blade moves to the standby position.