Feed Apparatus with Curved Separating Pad for Sheet Stability
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Solution Overview
Problem
Conventional feed apparatuses face challenges in downsizing while preventing overlapped sheet feeding due to instability in the angle at which sheets come into contact with separating pads, leading to a risk of sheets being fed overlappingly.
Innovation Solution
A feed apparatus with a movable support unit that can swing between two positions, where it forms a flat surface with a fixed support unit, and a separating pad positioned on the fixed support unit with a curved surface to prevent abrasion and ensure stable sheet contact, reducing the likelihood of overlapped feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the support unit is made swingable to reduce apparatus size, then the apparatus occupies less placement surface area, but the angle at which sheets contact the separating pad becomes unstable
Solution Approach 1:
The separating pad is designed with a curved surface rather than a flat surface. This curvature allows the separating pad to maintain stable contact with sheets even when the support unit swings to different positions, as the curved shape can adapt to varying angles while preserving the separating function.
Solution Approach 2:
The separating pad is positioned specifically on the fixed support unit rather than distributed across the entire support unit. This localized placement on the fixed portion ensures that the separating function remains stable and unaffected by the swinging motion of the movable support unit.
2Volume of moving object
If the feed roller and separating pad are positioned close to the movable portion to achieve downsizing, then the apparatus size is reduced, but the sheet contact angle becomes unstable due to height differences between support surfaces
Solution Approach 1:
The curved surface of the separating pad compensates for height differences and angular variations that occur during swinging motion, maintaining consistent sheet contact precision even when positioned close to the movable portion.
Solution Approach 2:
The separating pad is pre-positioned on the fixed support unit at an optimal location that anticipates the range of motion of the movable support unit, ensuring stable sheet separation throughout the entire swinging cycle.
3Area of stationary object
If a large swingable movable portion is used to achieve downsizing, then the apparatus occupies less space, but the separating pad experiences abrasion and peeling due to contact with the movable support unit
Solution Approach 1:
The separating pad is extracted from the movable support unit and relocated to the fixed support unit. This separation ensures that the separating pad remains stationary and does not undergo abrasion or peeling from contact with the swinging movable support unit, thereby extending its service life.
Solution Approach 2:
The support unit is divided into fixed and movable portions, with the separating pad assigned to the fixed portion. This segmentation allows the separating function to remain stable while the support function provides swinging motion for downsizing.
Data Source
AI summary
There is provided a feed apparatus including: a fixed support unit having a first support surface configured to support a sheet; a movable support unit having a second support surface configured to support the sheet and configured to move to a first position where the first support surface and the second support surface form one flat surface substantially and to a second position where the second support surface intersects with the first support surface with respect to the fixed support unit; a feed roller configured to feed the sheet supported by the second support surface of the movable support unit positioned at the first position and the first support surface in a feed direction; an arm having one end portion configured to rotatably support the feed roller and the other end portion configured to be swingable with respect to a shaft provided in the fixed support unit; and a separating pad provided at a position, being a position, of the first support surface, including the end on the second support surface side, opposed to the feed roller. The end of a surface of the separating pad on the second support surface side is curved downward rather than the second support surface positioned at the first position.