Rebar Tying Tool Cover-Cam Reel Locking for Easy Reel Changes
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Solution Overview
Problem
The existing rebar tying tools are complicated to use for setting and removing reels, requiring multiple operations against biasing forces and lock mechanisms, which hinders efficient workflow.
Innovation Solution
A rebar tying tool with a reel supporting mechanism that automatically switches between detachable and undetachable states based on the user's operation of closing or opening a cover, simplifying the process of setting and removing reels by using a cam mechanism for interconnection between the cover and bearing member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lock mechanism and biasing mechanism are used to ensure secure reel support, then the reliability of reel support is improved, but the ease of operation deteriorates due to multiple required operations
Solution Approach 1:
The patent combines the lock mechanism and biasing mechanism operations into a single integrated action. When the cover is closed, both the locking and biasing functions are activated simultaneously through the cam mechanism, eliminating the need for separate operations and reducing complexity while maintaining secure reel support.
Solution Approach 2:
The reel supporting mechanism automatically performs the locking and biasing actions when the cover is closed, without requiring the user to manually operate separate mechanisms. The system serves itself by converting the simple cover-closing motion into the complex sequence of locking and biasing operations needed for secure reel support.
2Reliability
If multiple mechanisms (biasing mechanism and lock mechanism) are added to control reel support states, then the reliability of reel support is improved, but the device complexity increases
Solution Approach 1:
The cam mechanism serves multiple functions simultaneously: it converts rotational motion from cover closure into linear motion that activates both the locking action and the biasing force application. This multi-functional component reduces the need for separate dedicated mechanisms for each function, thereby reducing overall device complexity while maintaining reliable reel support.
Solution Approach 2:
The cam mechanism acts as an intermediary that translates the simple user action of closing the cover into the complex coordinated actions of locking and biasing. This intermediary component simplifies the user interface while still achieving the complex mechanical coordination needed for reliable reel support, effectively mediating between simple user input and complex system response.
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
This configuration significantly improves the work performance by reducing the complexity of setting and removing reels, allowing for easier handling and efficient operation.
Implementation Method 1
a cam mechanism for interconnection between the cover and bearing member
Data Source
AI summary
A rebar tying tool configured to tie plural rebars using a wire is disclosed herein. The rebar tying tool may include a reel supporting mechanism configured to switch between a first state of detachably supporting a reel on which the wire is wound and a second state of undetachably supporting the reel; a wire feeding mechanism configured to feed the wire from the reel; and an openable cover that at least partially covers at least one of the reel supporting mechanism and the wire feeding mechanism. The reel supporting mechanism may switch from the first state to the second state by a user operation of closing the cover, and/or may switch from the second state to the first state by a user operation of opening the cover.