Roving Stop Assembly Reset Actuator Arm Positioning
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Solution Overview
Problem
In ring spinning machines, the narrow spindle gauge makes it difficult for operators to reset the roving detent element to its inactive position, especially when producing 'Core' yarn, which requires caution to avoid breaking the thin continuous filaments.
Innovation Solution
A roving stop assembly with a reset actuator arm positioned at the front of the drafting frame, allowing for easy and reliable resetting of the roving detent element by actuating the arm, thereby resuming the supply of roving without the need for operators to access inside the drafting frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the spindle gauge is made narrow to increase production capacity, then productivity is improved, but the ease of operation for resetting the roving detent element deteriorates
Solution Approach 1:
The patent relocates the reset actuator from the rear side of the drafting frame to the front side, changing the spatial dimension of the resetting operation. This allows operators to access the reset function from the front of the machine where there is sufficient working space, rather than reaching into the narrow gap between spindles at the rear.
Solution Approach 2:
The patent introduces a reset actuator as an intermediary mechanism that can be operated from the front of the drafting frame. This actuator transmits the resetting action through the drafting frame structure to the roving detent element at the rear, eliminating the need for direct manual access to the narrow spindle gap area.
2Device complexity
If operators manually reset the roving detent element in the narrow spindle gap, then the device complexity is minimized, but the reliability of handling operations deteriorates due to risk of filament breakage
Solution Approach 1:
The reset actuator serves as an intermediary that performs the resetting function remotely from the front of the drafting frame. This eliminates direct manual handling operations in the narrow spindle gap area where thin continuous filaments are vulnerable to breakage, while maintaining a relatively simple mechanical resetting mechanism.
Solution Approach 2:
The resetting mechanism is designed to be self-operating through the reset actuator, which can be automatically or easily manually actuated from the front. This reduces the need for careful manual manipulation in difficult-to-access areas, allowing the system to reset itself without operator intervention in the hazardous zone.
Data Source
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AI summary
Roving stop assembly (1) for a drafting frame (3) of a ring spinning machine, including at least a roving detent element (4) arranged to be able to act, in an active position, on one of said pair of rear drafting rollers (3a) or middle drafting rollers (3b), trigger means (5, 9) operably connected to the at least roving detent element (4) to trigger actuation of the at least roving detent element (4) to an active position, and reset means (6) for resetting by means of a resetting mechanism the at least roving detent element (4) to an inactive position to resume the supply of roving. The roving stop assembly is characterized in that the reset means include a reset actuator arm (10) arranged at the front (F) of the drafting frame (3).