Roll Changer Safety Zone Segmentation and Intermediary Transfer
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Solution Overview
Problem
Existing roll changers lack effective safety measures to protect operators from burst rolls and efficiently manage roll changes, particularly in environments where roll changes and storage processes are hazardous and require minimal disruption.
Innovation Solution
A roll changer with a safety device that includes a safety zone separated from the environment by a shut-off device, monitored by sensors, and a movable protective cover, allowing for safe access and parallel work steps during roll changes, with an integrated intermediate storage facility for flexible storage and reduced operational risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a safety zone is created around the roll changer with shut-off devices and protective covers, then operator safety is improved by preventing entry into danger zones and protecting from burst rolls, but device complexity increases due to additional safety components and monitoring systems
Solution Approach 1:
The safety system is segmented into distinct functional zones: a safety area for roll storage and handling, and a safety zone around the roll changer with the opening. Shut-off devices delimit the safety area, while protective covers and a rolling grille segment the opening and receiving/delivery areas. This segmentation allows targeted protection where needed while maintaining operational efficiency.
Solution Approach 2:
The at least one second means of transport acts as an intermediary by extending into the safety zone through the opening, enabling roll transfer between storage locations and the roll changer without requiring operators to enter the dangerous safety zone. This mediator facilitates safe material handling across the boundary between safe and dangerous areas.
2Device complexity
If the safety zone has a single opening for roll access, then device complexity is reduced by eliminating other openings, but ease of operation may be worsened by limiting access points for roll changes
Solution Approach 1:
The single opening in the protective cover serves multiple functions: it allows roll insertion, roll removal, and passage for the second means of transport. The opening is universally designed to accommodate various operational needs through the at least one access, eliminating the need for multiple separate openings while maintaining operational efficiency.
Solution Approach 2:
The at least one second means of transport extends in a direction perpendicular to the axis of rotation of the receiving devices, allowing rolls to be accessed and transferred through the single opening from storage locations positioned at right angles to the roll changer. This dimensional arrangement enables efficient roll changes through one opening by utilizing spatial relationships in another dimension.
3Productivity
If an intermediate storage facility is integrated into the safety area, then productivity is improved by enabling parallel work steps during roll changes, but device complexity increases due to additional storage infrastructure
Solution Approach 1:
The intermediate storage facility is merged with the safety area, combining roll storage functionality with the safety zone. Storage locations are positioned within the safety area, allowing rolls to be staged and prepared in advance without requiring separate external storage infrastructure. This merging enables parallel operations while utilizing existing safety infrastructure.
Solution Approach 2:
The intermediate storage facility enables preliminary action by allowing rolls to be positioned and prepared in storage locations within the safety area before the actual roll change operation. Rolls can be staged in advance, and the second means of transport can prepare for transfer, enabling smoother and faster roll changes without disrupting the printing press operation.
Data Source
Figure 1
Figure 2
Figure 3a~3c
AI summary
The invention relates to a roll changer (01) having a safety device, wherein the roll changer (01) comprises a take-up and/or payout area, and wherein a safety area (17) accessible through at least one entry (16) is designed to be adjacent to the roll changer (01) and bounded from the surrounding by the roll changer (01) and/or at least one unit and/or at least one blocking device (14), wherein the roll changer (01) comprises a safety zone (57) comprising the take-up and/or payout area and separated or separable from the safety area (17) by means of at least one first protection cover (62) disposed displaceably, and that the at least one first protective cover (62) is implemented for at least partially closing off and/or being able to close off an opening (63) of the safety zone (57) from the safety area (17).