Rebar Binding Machine With Wire-End Bending Control
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Solution Overview
Problem
Conventional reinforcing bar binding machines fail to reliably bend wire ends towards the binding objects, leading to protrusion issues that can interfere with work and reduce workability.
Innovation Solution
A binding machine equipped with a gripping unit and a bending unit that ensures wire ends are bent closer to the binding objects than the top of the wire, using a combination of feeding and gripping mechanisms to control the wire's direction and position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wire is wound around reinforcing bars and cut without bending, then the binding process is simple and fast, but the distal end portions of the wire project beyond the twisted region and may interfere with work
Solution Approach 1:
The wire is bent towards the reinforcing bar side before the twisting operation is completed. This preliminary bending action ensures that the distal end portions of the wire are positioned closer to the binding part, preventing them from projecting beyond the twisted region and interfering with subsequent work operations.
2Ease of operation
If the wire is bent towards the reinforcing bar side, then the distal end portions are positioned closer to the binding part, but the direction of bending is not fixed and the wire cannot be reliably bent in the desired direction
Solution Approach 1:
A guide member is introduced as an intermediary element to control the bending direction of the wire. The guide member has a guide groove that extends in the wire feeding direction, and the wire is guided along this groove during the bending process. This ensures that the wire is bent reliably towards the reinforcing bar side in the desired direction, rather than randomly.
Solution Approach 2:
The guide member is provided only at the specific location where wire bending control is needed, rather than throughout the entire binding mechanism. The guide groove is positioned to engage the wire at the bending point, providing localized directional control exactly where required for reliable wire positioning.
3Reliability
If a guide member with a guide groove is provided to control wire bending direction, then the wire can be reliably bent towards the reinforcing bar side, but the device complexity increases
Solution Approach 1:
The guide member is designed to perform multiple functions: it guides the wire during feeding, controls the bending direction towards the reinforcing bar side, and positions the wire for the twisting operation. By consolidating these functions into a single component, the overall device complexity is minimized while achieving reliable wire bending control.
Data Source
AI summary
It provides a reinforcing bar binding machine that allows binding objects such as reinforcing bars to be bound by wires with end portions of the wires directed to the binding object side. The reinforcing bar binding machine (1A) includes: a magazine (2A) in which two wires (W) are housed in a drawable manner; a curl guide unit (5A) that winds the juxtaposed wires (W) around the reinforcing bars (S); a wire feeding unit (3A) that winds the wires (W) around the reinforcing bars (S) with the curl guide unit (5A) in an operation of juxtaposing and feeding the wires (W) and winds the wires (W), which is wound around the reinforcing bars (S), around the reinforcing bars (S); and a binding unit (7A) that twists crossing portions of one end side and the other end side of each of the wires (W) wound around the reinforcing bars (S). The binding unit (7A) includes a bending portion (71) that bends the one end side and the other end side of each of the wires (W), which are wound around the reinforcing bars (S), toward the reinforcing bars (S).