Wire Binding Mechanism That Prevents Elastic Body Twisting
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Solution Overview
Problem
Existing binding machines for reinforcing bars experience reduced durability due to the generation of a force for twisting the elastic body that applies tension to the wire, leading to potential loosening of the binding.
Innovation Solution
A binding machine with a rotation shaft, movable body, elastic body, and prevention member that prevents the generation of a force for twisting the elastic body, using a compression and expansion mechanism to maintain tension and improve durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the elastic body is used to apply tension to the wire by compression and extension, then the binding force is improved, but the durability of the elastic body decreases due to twisting forces
Solution Approach 1:
The movable body is divided into two functional parts: a rotation body that rotates to twist the wire, and a compression body that moves axially to compress the elastic body. This segmentation separates the rotational twisting function from the axial compression function, preventing the transmission of twisting forces to the elastic body while maintaining its tension-applying function.
Solution Approach 2:
The elastic body is positioned and oriented such that it experiences only axial compression forces during operation. The prevention member ensures that the elastic body remains in a state where only the intended compression-tension cycle occurs, eliminating parasitic twisting stresses that would reduce its durability.
2Ease of operation
If the movable body rotates to twist the wire, then the binding function is achieved, but a force for twisting the elastic body is generated
Solution Approach 1:
The movable body is divided into a rotation body that handles the rotational twisting of the wire and a compression body that handles axial compression of the elastic body. This segmentation isolates the harmful twisting force generation to only the rotation body, preventing it from being transmitted to the elastic body.
Solution Approach 2:
The prevention member acts as an intermediary between the rotation body and the elastic body. It blocks the transmission path of twisting forces from the rotating component to the elastic body, allowing the rotation to occur for wire twisting while protecting the elastic body from damaging torsional stresses.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the durability of the elastic body by preventing twisting forces, ensuring a firm binding of reinforcing bars without compromising the binding force.
Implementation Method 1
an elastic body that is compressed by the movement of the movable body along the axial direction of the rotation shaft and that is configured to apply tension to a wire adapted to bind an object to be bound by an expanding force
Data Source
AI summary
A binding machine includes: a rotation shaft driven by a motor to rotate; a movable body that moves in an axial direction of the rotation shaft in conjunction with the rotation of the rotation shaft and that rotates about the rotation shaft; an elastic body that is compressed by the movement of the movable body along the axial direction of the rotation shaft and that is configured to apply tension to a wire adapted to bind an object to be bound by an expanding force; and a prevention member configured to prevent generation of a force for twisting the elastic body by the rotation of the movable body.