Stop Lever Auxiliary Unit for Conveyance Positioning
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Solution Overview
Problem
Conveyance devices fail to consistently stop and re-stop works during processing, as the abutment portion pivots away from the stop position when the work is raised and lowered, leading to potential conveyance issues.
Innovation Solution
A stop device with a stop lever, movable unit, biasing unit, driving unit, and auxiliary stop unit, where the auxiliary stop unit is positioned to prevent conveyance by abutting the work at the same or downstream position from the stop position, allowing the stop lever to pivot and retract effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the abutment portion is pivotally arranged with a biasing mechanism to relax shock during conveyance, then the shock is reduced, but the abutment portion pivots away from the stop position when the work is raised and lowered, causing the work to not be stopped
Solution Approach 1:
The stop device is divided into two independent functional segments: the stop lever with biasing mechanism for shock absorption, and the auxiliary stop unit for ensuring stop position accuracy. The auxiliary stop unit includes a separate abutment portion that independently ensures the work is stopped at the correct position, preventing the issue where the main abutment portion pivots away from the stop position during work elevation and lowering operations.
Solution Approach 2:
The auxiliary stop unit acts as an intermediary mechanism that compensates for the positional deviation caused by the pivotable abutment portion. When the work is raised and lowered, the auxiliary stop unit's abutment portion (positioned downstream) serves as a mediator to ensure the work is still stopped at the correct position, bridging the gap between the shock-absorbing pivotable mechanism and the required precise stopping function.
2Manufacturing precision
If the abutment portion is positioned exactly at the stop position, then the work is stopped accurately, but the abutment portion cannot pivot to relax shock when the work is conveyed
Solution Approach 1:
The stop function is segmented into two portions: the stop lever's abutment portion positioned upstream that pivots to absorb shock during conveyance, and the auxiliary stop unit's abutment portion positioned downstream that maintains precise stop position accuracy. This segmentation allows each portion to specialize in one function without compromising the other.
Solution Approach 2:
The auxiliary stop unit is pre-positioned downstream of the main stop lever, creating a preliminary stop mechanism that activates when the work approaches the stop position. This preliminary positioning ensures that even if the main abutment portion pivots away from the exact stop position during work elevation, the auxiliary portion is already in place to ensure accurate stopping.
3Object-affected harmful factors
If the stop lever pivots to a position on the upstream side slightly from the stop position to relax shock, then shock is reduced, but the work may not be stopped and conveyed when lowered again
Solution Approach 1:
The stop device is segmented into a main stop lever that handles shock absorption through pivoting, and an auxiliary stop unit that handles conveyance continuity. The auxiliary stop unit's abutment portion is positioned downstream and remains effective even when the main stop lever pivots away from the exact stop position, ensuring the work is stopped and conveyed continuously without interruption.
Solution Approach 2:
The auxiliary stop unit serves as an intermediary that maintains conveyance continuity when the main stop lever pivots. Its downstream-positioned abutment portion acts as a mediator that ensures the work is still stopped at the correct position and can be conveyed, bridging the gap between shock absorption and continuous conveyance operations.
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
Ensures reliable stopping and re-stopping of works during processing, preventing conveyance errors by maintaining the stop lever's position and functionality even when the work is raised and lowered.
Implementation Method 1
a biasing unit configured to bias the stop lever toward an upstream side in the conveyance direction
Data Source
AI summary
This invention provides a stop device that abuts against a work during conveyance and stops the work. The stop device includes a stop lever stopping the work at a predetermined stop position, a movable unit supporting the stop lever so as to pivot the stop lever in a predetermined range, a biasing unit biasing the stop lever toward an upstream side, a driving unit displacing the movable unit between a working position and a retraction position, and an auxiliary stop unit arranged in the movable unit. The auxiliary stop unit includes a work abutment portion at the same position as a conveyance stop position where the stop lever stops conveyance of the work, or at a position on the downstream side in the conveyance direction from the conveyance stop position.