Tape Feeder Squeezed Portion for Part Detection Stability
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Solution Overview
Problem
Existing part feeding devices in part mounting apparatuses face instability in part position and posture during transportation, leading to unsuitable positional relationships between part storage and detecting sensors, which results in unstable detection of fine parts.
Innovation Solution
A part feeding device with a transporting passage that includes a travelling surface and side guides, featuring a squeezed portion where the distance between side guides is gradually reduced towards the part detecting position, stabilizing the part feeding tape and enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional transporting passage is used without side guides, then the device complexity is low, but the part position and posture become unstable during transportation
Solution Approach 1:
The patent applies side guides only at specific locations where the part feeding tape enters and exits the transporting passage, rather than lining the entire passage. This localized application provides sufficient positional stability while minimizing structural complexity and manufacturing cost.
Solution Approach 2:
The side guides act as intermediary elements that mediate between the part feeding tape and the transporting passage walls. These guides stabilize the tape's position and posture during transport without requiring the entire passage structure to be complex.
2Measurement precision
If the distance between side guides is constant throughout the transporting passage, then the manufacturing precision is low, but the part detection accuracy is insufficient
Solution Approach 1:
The patent implements a squeezed portion with reduced distance between side guides specifically at the detection zone, while maintaining larger distances in other sections. This localized variation optimizes part detection accuracy without requiring high manufacturing precision across the entire passage.
Solution Approach 2:
The patent changes the geometric parameter (distance between side guides) at a specific location to create a squeezed portion. This parameter change concentrates the tape and improves detection accuracy without requiring uniform precision throughout the entire transporting passage.
3Reliability
If the transporting passage has large clearance, then the ease of operation is high, but the part feeding tape becomes unstable and jams occur
Solution Approach 1:
The patent provides tight clearance only in the squeezed portion at the detection zone, while maintaining easier insertion clearance in other sections. This localized constraint prevents tape instability and jamming during transport without making the overall insertion process difficult.
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 ensures stable detection of fine parts by maintaining the part feeding tape's position and posture, preventing errors in part presence determination and reducing jamming, thereby improving the reliability of part detection.
Implementation Method 1
a squeezed portion in which a distance between the pair of side guides is gradually reduced from an upstream side of the part detector toward a part detecting position of the part detector
Implementation Method 2
a travelling surface for supporting the part feeding tape from underneath
Implementation Method 3
a pair of side guides for guiding side surfaces of the part feeding tape
Implementation Method 4
a part detector for detecting the part stored in the storage in the transporting passage
Data Source
AI summary
A tape feeder (part feeding device) includes a main body including a transporting passage for guiding a part feeding tape to a part removing position, a conveyor for positioning a storage of the part feeding tape which is inserted to the transporting passage to the part removing position, and a part detector for detecting the part stored in the storage in the transporting passage at the upstream side of the part removing position. The transporting passage includes a travelling surface for supporting the part feeding tape from underneath, a pair of side guides for guiding two side surfaces of the part feeding tape, and a squeezed portion in which a distance between the pair of side guides is gradually reduced from the upstream side of the part detector toward a part detecting position of the part detector.