Blind Rivet Tool Floating Jaw Ejection
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Solution Overview
Problem
Existing tools for fastening blind rivets require the jaws to be opened for setting, which is inconvenient, and they lack a mechanism to easily eject the rivet head after fastening.
Innovation Solution
A tool with a spring-loaded floating piece that opens and closes the jaws and ejects the rivet head, featuring a movable floating piece within the nose piece to maintain jaws open at the starting position and facilitate rivet head ejection after fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the jaws are closed at the starting position, then the fastening tool can grip the mandrel, but it requires an additional opening mechanism and increases device complexity
Solution Approach 1:
Instead of having the jaws closed at the starting position and requiring an opening mechanism, the invention inverts the state by having the jaws open at the starting position. The floating piece is biased to push the jaws open, and a closing mechanism activates them only during the fastening operation, thereby eliminating the need for a separate opening mechanism and simplifying the device.
Solution Approach 2:
The floating piece automatically maintains the jaws in the open position at the starting state through its biased configuration. This self-service mechanism eliminates the need for external intervention or additional components to keep the jaws open, thereby reducing device complexity while improving ease of operation.
2Reliability
If the rivet head is squeezed in by the nose piece, then the blind rivet fastens securely, but a mechanism is needed to push the rivet head out after fastening
Solution Approach 1:
The invention combines the ejection function with the existing floating piece that already controls the jaws. The floating piece is configured to push the rivet head out after fastening, merging two functions (jaw control and rivet ejection) into a single component, thereby reducing device complexity while maintaining reliable fastening.
Solution Approach 2:
The floating piece serves multiple functions: it maintains the jaws in the open position at the starting state, allows them to close during fastening, and subsequently pushes the rivet head out after fastening. This multi-functionality eliminates the need for separate ejection mechanisms, reducing device complexity while ensuring secure fastening.
3Reliability
If the jaws remain closed after fastening, then the mandrel is securely held, but the tool cannot return to the starting position for the next rivet
Solution Approach 1:
The floating piece enables periodic action by automatically transitioning the jaws between open and closed states. After fastening, the floating piece pushes the jaws open, allowing the tool to reset for the next rivet. This periodic opening-closing action ensures secure mandrel holding during fastening while enabling rapid tool reset, thereby improving productivity.
Solution Approach 2:
The floating piece automatically resets the jaws to the open position after fastening without requiring external intervention. This self-service mechanism ensures that the tool is ready for the next rivet operation immediately, improving productivity while maintaining secure mandrel holding during the fastening process.
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
Enables easier fastening operations by keeping jaws open at the starting position and automatically ejecting the rivet head, improving the efficiency of blind rivet fastening and tool return to the starting position.
Implementation Method 1
a spring-loaded floating piece that opens and closes the jaws
Data Source
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AI summary
To provide a blind rivet fastening tool in which the jaws are open at the original position, and at a return step in which the tool is returned to the original position after a blind rivet is fastened, the fastened blind rivet is pushed out. A blind rivet fastening tool comprises a hollow nose housing (52) for housing a mandrel (20); a nose piece (51) provided at a front end of the nose housing (52), the nose piece (51) having an opening (59); a floating piece (60) provided at a front end of the inside of the nose piece (51); the floating piece (60) having a though hole (64) in which the mandrel (20) is inserted; a jaw guide (53) provided at the back side of floating piece (60), the jaw guide having an inside surface which has a smaller diameter toward the front end thereof; jaws (54) provided inside the jaw guide (53) for holding the mandrel (20); a pulling head (55) for pulling the jaw guide (53) in a back direction, and a jaw pusher (56) for pushing the jaws (54) in the forward direction.