Sheet Material Supply Device Foreign Substance Detection
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Solution Overview
Problem
Conventional sheet-material supply devices face challenges in accurately detecting and retaining the uppermost sheet material in a stacked state, especially when small-sized foreign substances or materials are present, which can lead to damage to the device and the sheet materials during elevation.
Innovation Solution
A sheet-material supply device incorporating a lift, a sheet-material detector, and a movable sheet-material retaining conveyor that stops elevation when the uppermost sheet material reaches a predetermined height, utilizing multiple floating-and-retaining conveyance devices with elevation detectors to prevent damage from small-sized substances and ensure reliable sheet material separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the lift continuously elevates the sheet materials in stacked state, then the sheet material supply efficiency is improved, but small-sized foreign substances or materials may cause damage to the conveyance device and sheet materials
Solution Approach 1:
The elevation detector detects the presence of small-sized foreign substances before the lift completes its elevation stroke. When a foreign substance is detected, the system stops the elevation movement in advance, preventing the foreign substance from causing damage to the conveyance device or sheet materials during the elevation process.
Solution Approach 2:
The elevation detector acts as an intermediary safety device between the lift mechanism and the sheet materials. It monitors the elevation process and provides feedback to the control unit, which then controls the lift to stop when foreign substances are detected, preventing direct contact and potential damage.
2Measurement precision
If the sheet-material detector is positioned to detect the uppermost sheet material at predetermined height, then accurate sheet material detection is achieved, but small-sized foreign substances may be missed leading to device damage
Solution Approach 1:
The detection function is segmented into two separate detectors: the sheet-material detector for detecting the uppermost sheet material at predetermined height, and the elevation detector for detecting small-sized foreign substances during elevation. Each detector is positioned and configured to detect specific targets, ensuring both accurate sheet material detection and reliable foreign substance detection.
Solution Approach 2:
The elevation detector is positioned at a different spatial location and detection dimension compared to the sheet-material detector. While the sheet-material detector monitors the top surface of the stacked sheet materials, the elevation detector monitors the elevation path and surrounding areas, detecting foreign substances from another dimensional perspective.
Data Source
AI summary
A sheet-material supply device includes a lift, a sheet-material detector, and a sheet-material retaining conveyor. The lift elevates sheet materials in a stacked state. The sheet-material detector detects that an uppermost sheet material of the sheet materials in the stacked state has reached a predetermined height. The sheet-material retaining conveyor retains and conveys the uppermost sheet material that has reached the predetermined height. The sheet-material supply device stops elevation of the sheet materials in the stacked state when the sheet-material detector detects that the uppermost sheet material has reached the predetermined height. The sheet-material retaining conveyor is disposed to be movable in a direction in which the sheet materials in the stacked state elevate.