Sheet Jam Detection Using Light Curtains in Processing Stations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern sheet processing machines face high risks of jams during high-speed operations, particularly in blanking tools and piling areas, leading to production of damaged or low-quality products.
Innovation Solution
A jam detection device using a light curtain formed by multiple light emitting and receiving elements, mounted on parallel rails, to create a spatially resolved detection zone, which differentiates between normal operation and jams by measuring light barrier interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high processing speed is used to increase productivity, then productivity is improved, but the risk of sheet jams increases
Solution Approach 1:
The light barrier detection system is positioned upstream in the processing path to detect sheets before they reach critical jam-prone areas. This preliminary detection allows the system to identify potential jams early and respond before damage occurs, enabling high-speed operation while maintaining reliability.
Solution Approach 2:
The detection system provides real-time feedback about sheet presence and potential jams to the control system. This feedback loop enables immediate response to jam conditions, allowing the machine to operate at high speeds with automatic protection against jams through rapid detection and response.
2Device complexity
If simple detection means is used to reduce cost, then device complexity is reduced, but detection reliability may be insufficient
Solution Approach 1:
The patent replaces complex mechanical detection systems with an optical detection system using light barriers. This substitution maintains simplicity in terms of mechanical components while achieving high reliability through optical sensing, which can detect sheet presence and jams with greater accuracy and faster response times.
Solution Approach 2:
The light barrier acts as an intermediary detection mechanism that indirectly senses sheet presence and jam conditions without requiring direct mechanical contact or complex sensors. This intermediary approach simplifies the detection system while providing reliable jam detection capability.
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
Provides reliable and cost-effective jam detection, allowing timely intervention to prevent damage and ensure high-quality product output by identifying and localizing jams accurately.
Implementation Method 1
a light emitting element and a light receiving element forming a light barrier in a detection zone of a processing station of the sheet processing machine
Data Source
AI summary
A sheet processing machine (10) with a jam detection device (44, 46), the jam detection device (44, 46) comprising a light emitting element and a light receiving element forming a light barrier in a detection zone (53, 78) of a processing station of the sheet processing machine (10). The jam detection device (44, 46) further comprises a control unit (48) being connected to the light receiving element and being adapted to register if the light barrier is interrupted.