Sheet Feeding Device Positioning Pin Load Distribution
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Solution Overview
Problem
Image forming apparatuses face issues with positioning accuracy and conveyance failures when a sheet feeding device is added, as existing solutions can damage cartridge guides and struggle to distribute the weight of the apparatus main body effectively, leading to potential bending of the sheet feeding device frame.
Innovation Solution
A sheet feeding device with a mounting member, reinforcement member, and positioning pin configuration, where the positioning pin fits into a depression on the apparatus main body, with a guard part contacting the depression edge and a lower part contacting the reinforcement member, dispersing the load and preventing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If positioning protrusion and positioning depression are provided in cartridge guides to improve positioning accuracy, then positioning accuracy is improved, but the cartridge guides are susceptible to damage when impact is added
Solution Approach 1:
The positioning mechanism is segmented into multiple components: positioning protrusions on the cartridge guide, positioning depressions on the sheet feeding device, and reinforcement members on the sheet feeding device frame. This segmentation allows the load to be distributed across multiple contact points rather than concentrated on a single fragile interface, thereby improving both positioning accuracy and durability.
Solution Approach 2:
The reinforcement members are provided in advance on the sheet feeding device frame to cushion and distribute the impact load before it reaches the positioning protrusions and depressions. This beforehand cushioning protects the positioning mechanism from damage while maintaining positioning accuracy.
2Adaptability or versatility
If the apparatus main body is placed on the sheet feeding device to add the sheet feeding device, then the sheet feeding device can be added to the apparatus main body, but the frame of the sheet feeding device may bend due to decreased positioning accuracy
Solution Approach 1:
The supporting function is segmented across multiple reinforcement members distributed along the frame, rather than relying on a single support point. This segmentation distributes the weight load of the apparatus main body across multiple locations, preventing frame bending while maintaining the ability to add the sheet feeding device.
Solution Approach 2:
The reinforcement members are provided in advance on the sheet feeding device frame to cushion and distribute the weight load before the apparatus main body is placed on it. This beforehand structural reinforcement prevents frame bending while allowing the sheet feeding device to be added to the apparatus main body.
3Force
If the supporting face is divided into two parts to decrease load on the ejecting opening side, then the weight load is distributed, but mechanism members are gathered at the ejecting opening side making it difficult to decrease the weight load
Solution Approach 1:
The supporting face is segmented into multiple support points along the frame, with reinforcement members positioned at specific locations. This segmentation allows the weight load to be distributed across multiple points rather than concentrated at the ejecting opening side, while the mechanism members remain in their functional positions.
Data Source
AI summary
A sheet feeding device comprises a structure as an option, on which an apparatus main body of an image forming apparatus having a lower face with a positioning depression is placed. The structure includes a mounting member, a reinforcement member and a positioning pin. The mounting member is located to face to a periphery of the lower face. The reinforcement member is located below the mounting member. The positioning pin includes an upper part having a guard part and a lower part. The pin penetrates the mounting member so that the upper part can fit in the positioning depression and the lower part can come into contact with the reinforcement member. When the apparatus main body is placed, the upper part fits in the positioning depression, the guard part comes into contact with an edge of the positioning depression and the lower part comes into contact with the reinforcement member.