Rebar Binding Wire Gripper Layout for Compact Rotation
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Solution Overview
Problem
Existing reinforcing bar binding machines face challenges in miniaturization due to complex structures and require intricate mechanisms for rotating gripping members, making them bulky and difficult to operate efficiently.
Innovation Solution
A binding machine design where one end of the pair of gripping members is rotatably supported by a shaft, allowing them to move toward and away from each other, enabling gripping and releasing of wire by rotation, thus simplifying the structure and facilitating miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first movable gripping member and the second movable gripping member are opened and closed by parallel movement, then the gripping operation is stable, but the lateral dimension increases and miniaturization becomes difficult
Solution Approach 1:
The patent transitions from parallel movement (one-dimensional linear motion) to rotation around a shaft (circular motion in a different dimensional space). The gripping members rotate around a common shaft, allowing the distal ends to move toward and away from each other through rotational motion rather than parallel linear movement, thereby reducing lateral dimension while maintaining gripping functionality
Solution Approach 2:
The shaft serves multiple functions: it supports both the first and second movable gripping members, provides the rotation axis for both members, and enables the compact arrangement of the gripping mechanism. This multi-functional element reduces the overall structure complexity and lateral dimension
2Volume of moving object
If the first movable gripping member and the second movable gripping member are opened and closed by rotating operation with a shaft as a fulcrum, then the structure can be more compact, but a complex rotating mechanism is required
Solution Approach 1:
The patent merges the rotation axes of the first and second movable gripping members into a single common shaft. Instead of requiring separate fulcrums and rotation mechanisms for each gripping member, both members rotate around the same shaft, simplifying the overall rotating mechanism while achieving compact structure
Solution Approach 2:
The gripping members are positioned asymmetrically around the shaft, with the distal ends facing each other. This asymmetric arrangement allows the members to approach and separate along the axial direction of the shaft through rotation, achieving compact design without requiring complex synchronization mechanisms
Data Source
Figure 1
Figure 2~3
Figure 4A~4C
AI summary
It provides a reinforcing bar binding machine capable of reliably performing a gripping operation of a wire with a simple configuration. The reinforcing bar binding machine includes: a first movable gripping member (70L) that is displaced in a direction coming in contact with and separating from one side of a fixed gripping member (70C); a second movable gripping member (70R) that is displaced in a direction coming in contact with and separating from the other side of the fixed gripping member (70C); a bending portion (71) that brings the first movable gripping member (70L) and the second movable gripping member (70R) into and out of contact with the fixed gripping member (70C), wherein the fixed gripping member (70C) includes a shaft (77) that rotatably supports the first movable gripping member (70L) and the second movable gripping member (70R), and the bending portion (71) includes an opening and closing pin (71a) that pushes an opening and closing guide hole (77L) provided in the first movable gripping member (70L) and an opening and closing guide hole (77R) provided in the second movable gripping member (70R).