Rebar Tying Reel Stopper and Roller Linkage for Easier Wire Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rebar tying machines require complex manipulations to keep the reel stopper in a prohibited state, making the process cumbersome.
Innovation Solution
A rebar tying machine design that allows the second roller to switch states in response to the reel stopper transitioning from a prohibited to a permitted state, facilitated by a simple mechanism involving a link member and biasing member, reducing the complexity of maintaining the reel stopper in the prohibited position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reel stopper is kept in the prohibited state using the conventional mechanism, then the reel is securely held, but the manipulation becomes complex requiring multiple steps
Solution Approach 1:
The patent combines the reel stopper mechanism with the second roller state switching mechanism into a single integrated system. When the reel stopper switches from prohibited to permitted state, it automatically triggers the second roller to switch from first state to second state, eliminating the need for separate manual operations and reducing manipulation complexity while maintaining secure reel holding
Solution Approach 2:
The system performs preliminary state preparation by automatically switching the second roller to the appropriate state based on the reel stopper position. This preliminary action ensures that the wire holding mechanism is ready in advance, preventing accidental wire release and simplifying the user's interaction sequence
2Reliability
If the second roller maintains a constant force to hold the wire, then wire holding is secure, but the force required for manipulation increases
Solution Approach 1:
The patent implements a dynamic force mechanism where the second roller switches between different states: in the first state, it applies sufficient force to securely hold the wire between the first and second rollers; in the second state, it reduces the force when wire holding is not required. This dynamic adjustment maintains wire security during operation while reducing manipulation force when the reel stopper is in permitted state
Solution Approach 2:
The system changes the physical parameter of force applied by the second roller based on the operational state. By switching between first state (higher force for wire holding) and second state (lower force for easy manipulation), the system optimizes both wire holding security and user interaction ease through parameter variation
Data Source
AI summary
A rebar tying machine may include a reel holding section for holding a reel; a reel stopper switchable between a prohibited state in which the reel is prohibited from being removed and a permitted state in which the reel is permitted to be removed; a rotatable first roller; a rotatable second roller, wherein the second roller is switchable between a first state in which a wire is held between the first roller and the second roller and a second state in which a distance between the first roller and the second roller is longer than a distance between the first roller and the second roller in the first state; and a twisting unit for twisting the wire. The second roller may be switched from the first state to the second state when the reel stopper switches from the prohibited state to the permitted state.