Screen-Printing Replacement Frame Rack With Pull-Out Stopper
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Solution Overview
Problem
Existing printing devices with automatic replacement mechanisms for heavy replacement members face safety risks when the replacement frame is manually pulled out, potentially leading to the frame falling due to excessive extraction.
Innovation Solution
An accommodating rack and replacement frame system with a rack-side stopper and frame-side stopper mechanism that engages to restrict the removal of the replacement frame in a pulled-out state, preventing the frame from falling and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the replacement frame is pulled out for manual replacement of heavy replacement members, then the worker can access and replace the member, but the replacement frame may fall due to excessive extraction
Solution Approach 1:
The rack-side stopper and frame-side stopper are engaged in advance to prevent the replacement frame from being pulled out excessively. This preliminary restraining action counteracts the potential falling hazard before it can occur, allowing workers to safely access and replace heavy members manually.
2Ease of operation
If the replacement frame is fully extracted for replacement, then the replacement member can be accessed, but the frame may become unstable and fall
Solution Approach 1:
The stopper mechanism applies preliminary restraining force to the replacement frame, preventing it from reaching an unstable fully-extracted position. This allows the frame to be pulled out sufficiently for worker access while maintaining stability throughout the operation.
3Ease of operation
If the replacement frame is designed to be easily removable, then manual replacement is simplified, but safety risks increase due to potential frame falling
Solution Approach 1:
The engaged stoppers create a preliminary safety constraint that prevents the harmful frame-falling event while allowing easy manual removal operations. The stoppers are positioned to engage naturally during normal handling, providing passive safety without complicating the removal process.
Data Source
AI summary
Accommodating rack 51 is used in a printing device including a printing section that performs a printing process of viscous fluid on a processing object using a screen mask, and accommodates, in a shelf shape, a replacement frame including a support portion that supports a replacement member used in the printing device and a frame-side stopper. The accommodating rack includes an accommodating section configured to accommodate the replacement frame, a guide section configured to support the replacement frame and guide the replacement frame between the accommodating section and an outside, and a rack-side stopper protruding toward an inside of the frame from a reference outer surface of the replacement frame and engaging with the frame-side stopper to restrict removal of the replacement frame in a pulled-out state in which the replacement frame is pulled out from the accommodating rack.