Sheet Feeding Device Roller Replacement Mechanism
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Solution Overview
Problem
In image forming apparatuses, the rollers in sheet feeding devices, particularly those following a C-path route, are difficult to replace due to their rear-facing disposition, leading to maintenance challenges and potential sheet feeding failures.
Innovation Solution
A sheet feeding device design featuring a pickup roller, feed roller, feed holder, supporting frame, and driving shaft, where the feed holder is detachably supported on a storage recessed part with guide and positioning features, allowing for easy alignment and coupling of the rotating shaft with the driving shaft, facilitating the replacement of rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the feed holder is detachably supported on the supporting frame with guide and positioning features, then the ease of repair is improved, but the device complexity increases
Solution Approach 1:
The sheet feeding device is divided into separable modules: the feed holder containing rollers (pickup roller, feed roller, retard roller) is made detachable from the supporting frame. This segmentation allows individual roller replacement without disassembling the entire device, improving maintenance ease while the modular design keeps the added complexity manageable.
Solution Approach 2:
The storage recessed part with guide parts and positioning parts acts as an intermediary structure between the feed holder and supporting frame. The guide parts (grooves or ribs) and positioning parts (protrusions or holes) provide a standardized interface that simplifies the attachment and detachment process, making the complex interaction between components systematic and easy to follow.
2Manufacturing precision
If the guide part and positioning part are provided on the supporting frame, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The guide parts and positioning parts are pre-formed on the supporting frame during manufacturing. The guide grooves or ribs and positioning protrusions or holes are created in advance with precise dimensions and locations, ensuring accurate alignment when the feed holder is attached. This preliminary preparation eliminates the need for complex adjustment procedures during assembly.
Solution Approach 2:
The positioning part features (protrusions fitting into holes or complementary shapes) enable self-aligning and self-locking of the feed holder to the supporting frame. When the feed holder is inserted, the positioning parts automatically guide it to the correct position and secure it, reducing the need for external alignment tools or complex fastening mechanisms.
Data Source
AI summary
A sheet feeding device includes a feed roller, a feed holder, a supporting frame and a driving shaft. The feed roller is configured to rotate around a rotating shaft. The feed holder is configured to support the feed roller. The supporting frame has a storage recessed part in which the feed holder is attachable and detachable along a direction crossing an axial direction of the rotating shaft. The driving shaft is supported to the supporting frame on one side of the storage recessed part in the axial direction. The storage recessed part has a guide part and a positioning part. The guide part is configured to guide the feed holder. The rotating shaft is coupled to the driving shaft by sliding the feed holder positioned at the aligning position by the positioning part in the axial direction.