Rebar Tying Tool Reel Loading With Linked Stopper and Roller

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Solution Overview

Problem

The existing rebar tying tools are complicated in reel replacement and attachment processes due to the need to switch the driven roller between clamped and non-clamped states and the stopper between prohibiting and allowing states, making these operations cumbersome.

Innovation Solution

A rebar tying tool configuration where the driven roller is always in the non-clamped state when the stopper is in the allowing state, simplifying reel replacement and attachment by allowing easy insertion of the wire between the driving and driven rollers, and an operating part that switches both the driven roller and stopper states with a single operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the stopper and driven roller are switched between different states during reel replacement, then the reel can be securely held and wire can be clamped during operation, but the reel replacement and attachment processes become complicated and time-consuming

Engineering Contradiction:

Improvesecure holding of reel and wire clampingVSAvoidreel replacement and attachment process

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent combines the stopper mechanism and driven roller clamping mechanism into an integrated system. When the stopper is in the allowing state, the driven roller is automatically in the non-clamped state, and vice versa. This merging of functions reduces the number of independent operations needed during reel replacement while maintaining secure holding during operation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent inverts the traditional approach by making the driven roller automatically switch states based on the stopper position, rather than requiring independent manual switching of both components. This inversion simplifies the operation sequence during reel replacement and attachment.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If multiple switching operations are required for reel replacement, then the reel can be securely managed during operation, but the replacement work becomes complicated and reduces productivity

Engineering Contradiction:

Improvereel management during operationVSAvoidreel replacement efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent merges the control of the stopper and driven roller into a single integrated mechanism. The driven roller's clamping state is automatically determined by the stopper's position, reducing multiple switching operations to a single action during reel replacement, thereby improving productivity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The driven roller automatically switches between clamped and non-clamped states based on the stopper's position, eliminating the need for separate manual operations. This self-service mechanism reduces operational complexity and speeds up reel replacement without compromising reel management reliability.

Inventive Principle:

Principle #25Self-service

3Reliability

If the driven roller remains in clamped state during reel attachment, then wire clamping is maintained, but the tip end of the wire cannot be easily inserted between the rollers

Engineering Contradiction:

Improvewire clamping maintenanceVSAvoidwire insertion during reel attachment

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent inverts the traditional sequence by automatically switching the driven roller to the non-clamped state when the stopper is in the allowing state, enabling easy wire insertion during reel attachment. After attachment, the system automatically returns to the clamped state to maintain wire clamping, eliminating the need for manual intervention.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS12098560B2Rebar tying tool

Publication Date: 2024.09.24 MAKITA CORP

AI summary

A rebar tying tool may include a holder, a stopper, a driving roller, and a driven roller. The stopper may be configured to switch between a prohibiting state in which the stopper prohibits a reel from detaching from the holder and an allowing state in which the stopper allows the reel to detach from the holder. The driving roller may be configured to rotate. The driven roller may be configured to switch between a clamped state and a non-clamped state, the wire may be clamped between the driving roller and the driven roller when the driven roller is in the clamped state, and the wire may not be clamped between the driving roller and the driven roller when the driven roller is in the non-clamped state. The driven roller may be in the non-clamped state at all times while the stopper is in the allowing state.