Rebar Binding Machine Guide for Narrow Ground Clearance

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Solution Overview

Problem

Existing binding machines face difficulties in inserting a reinforcing bar into guide parts when the gap between the reinforcing bar and the ground is narrow, leading to contact with the ground and improper insertion.

Innovation Solution

A binding machine with a variable induction part that adjusts the distance between the induction part and the contact part, allowing the reinforcing bar to be inserted even in narrow spaces by varying the distance to accommodate different operational conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the guide part is positioned at a distance from the operator's viewpoint (using an elongated connecting part), then the binding operation can be performed with better ergonomics, but the guide part cannot be reliably inserted into the opening when the gap between the binding object and ground is narrow

Engineering Contradiction:
Improveoperator ergonomicsVSAvoidinsertion reliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The induction part is designed to be movable relative to the guide part, allowing it to dynamically adjust its position. It can be extended forward when sufficient space exists and retracted when narrow gaps are encountered, enabling the binding machine to adapt to different working conditions and maintain both ergonomic positioning and reliable insertion capability

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the parameter of the induction part's position (distance from the guide part) based on the working conditions. By adjusting this parameter, the system can accommodate varying gaps between the binding object and ground while maintaining proper guide part positioning for reliable insertion

Inventive Principle:
Principle #35Parameter changes

2Reliability

If the induction part is positioned close to the guide part, then the binding object can be inserted reliably, but the operator's viewpoint is too close to the operation site reducing visibility

Engineering Contradiction:
Improveinsertion reliabilityVSAvoidoperator visibility
Core Design Contradiction:
ReliabilityVSIllumination intensity

Solution Approach 1:

The induction part's movable design allows it to be positioned at different distances from the guide part. When extended, it provides better visibility for the operator; when retracted, it ensures reliable insertion. This dynamic positioning resolves the contradiction between visibility and insertion reliability

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention separates the functions of visibility and insertion by positioning them at different spatial dimensions. The induction part (for visibility) and guide part (for insertion) are arranged along the longitudinal axis, allowing independent optimization of each function's position

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Manufacturing precision

If the guide part tip contacts the ground during insertion, then the binding object cannot be inserted at the predetermined position, but extending the induction part forward causes it to contact the ground in narrow spaces

Engineering Contradiction:
Improveinsertion position precisionVSAvoidground contact interference
Core Design Contradiction:
Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The invention extracts the induction function from the guide part by adding a separate, movable induction part. This allows the guide part to maintain its fixed position for precise insertion, while the induction part can be independently adjusted to avoid ground contact interference

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentEP4047158B1Binding machine
Publication Date: 2026.04.01 MAX CO LTD
  • EP4047158B1 patent drawingFigure 1A
  • EP4047158B1 patent drawingFigure 1B
  • EP4047158B1 patent drawingFigure 1C

AI summary

A binding machine includes: a feeding unit configured to feed a wire; a guide part configured to wind the wire fed by the feeding unit around a binding object; a twisting unit configured to twist the wire wound on the binding object by the guide part; and a contact part against which the binding object is butted. The guide part includes: a first guide configured to curl the wire around the binding object butted against the contact part; a second guide configured to guide the wire curled by the first guide to the twisting unit; and an induction part provided to at least one of the first guide and the second guide, and configured to guide the binding object between the first guide and the second guide. The induction part is configured so that a distance between the induction part and the contact part is variable.