Sheet Conveying Apparatus Bendable Presser Plate
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Solution Overview
Problem
The existing sheet conveying apparatus experiences multiple feeding issues as the contact angle between the arm and the sheets changes from a fully loaded to a near empty state, leading to increased pressure and likelihood of sheets being conveyed in an overlapping state.
Innovation Solution
A sheet conveying apparatus with a pivotable arm and a presser plate that includes a bendable portion, where the bend angle is maintained at an obtuse angle during the transition from fully loaded to near empty states, ensuring a consistent contact angle and preventing overlapping sheet conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the supply tray transitions from fully loaded to near empty state, then the contact angle between the arm and sheets increases, but this causes multiple feeding of sheets
Solution Approach 1:
The presser plate is designed with a bendable portion that allows it to dynamically change its angle relative to the arm as sheets are consumed. The bendable portion enables the presser plate to maintain an appropriate pressing angle against the sheets throughout the entire range from fully loaded to near empty state, preventing the contact angle from increasing and causing multiple feeding.
Solution Approach 2:
The invention changes the geometric parameter of the presser plate by introducing a bendable portion that can alter the plate's angle. This parameter change allows the system to maintain optimal contact conditions between the arm and sheets regardless of the supply tray's load level, thereby preventing multiple feeding while ensuring reliable sheet conveyance.
2Device complexity
If the presser plate is made rigid, then the structure is simple, but the contact angle varies with sheet amount causing feeding issues
Solution Approach 1:
The presser plate is segmented into a fixed portion and a bendable portion. This segmentation allows the fixed portion to provide structural stability while the bendable portion adapts to changing sheet amounts, maintaining reliable sheet conveyance without requiring complete redesign of the entire presser plate structure.
Solution Approach 2:
By incorporating a bendable portion, the presser plate transitions from a completely rigid structure to a semi-rigid structure with adaptive capabilities. This dynamic element allows the presser plate to automatically adjust its pressing angle as sheets are consumed, ensuring stable sheet conveyance throughout the supply tray's operational range.
Data Source
AI summary
A sheet conveying apparatus, including: a sheet container; a roller; an arm rotatably supporting the roller; and a presser plate for pressing sheets in the container, wherein distal and basal portions of the presser plate define a bend angle when bent, the bend angle being an angle defined on one side of the presser plate farther from the arm, the bend angle being maintained at an obtuse angel in a first-amount loaded state of the container, and wherein a contact angle of the arm and the sheets at a contact position thereof is smaller than a maximum angle from a maximally loaded state to the first-amount loaded state, the maximum angle being an angle defined by: the basal portion in the maximally loaded state; and the arm whose roller contacts the presser plate in the maximally loaded state when assumed that the sheets are not loaded on the presser plate.