Sheet Feeding Apparatus with Dynamic Tray Positioning for Motor Load Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet feeding apparatuses struggle to accommodate and feed long transfer media without overloading the motor, leading to restricted usable sizes and increased costs when trying to enhance motor power.
Innovation Solution
A sheet feeding apparatus with a vertically movable tray, equipped with an overload detector, intermediate tray position detector, and hardware processor that controls tray movement based on the type of media, allowing or prohibiting lifting and descent according to predefined loading limits, and providing warnings for overloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the motor power is enhanced to lift long transfer media, then the usable sizes of sheets can be expanded, but the costs increase
Solution Approach 1:
The patent applies dynamics by making the tray lowering limit position variable rather than fixed. The control unit dynamically adjusts the lowering limit position based on the detected length of transfer media, allowing the tray to be lowered further for shorter media while restricting lowering for longer media to prevent motor overload. This dynamic adjustment enables the use of various sheet sizes without requiring enhanced motor power.
Solution Approach 2:
The patent changes the parameter of tray position (lowering limit) based on the length of transfer media. By detecting media length and corresponding the detected length to a specific lowering limit position, the system adapts its operational parameters to match the loaded media characteristics, enabling versatile sheet size accommodation without hardware modifications.
2Adaptability or versatility
If long transfer media are loaded on the tray, then the usable sizes can be expanded, but the motor cannot lift the tray due to excessive mass
Solution Approach 1:
The patent applies preliminary action by detecting the length of transfer media before the lifting operation and pre-setting the appropriate lowering limit position. The control unit reads detection results and determines the media type in advance, then configures the tray control parameters accordingly before the lifting attempt, preventing motor overload conditions from occurring.
Solution Approach 2:
The patent implements feedback by using a detection unit to measure transfer media length and feeding this information back to the control unit. The control unit then adjusts the tray lowering limit based on this feedback, creating a closed-loop control system that ensures the motor operates within its capacity while accommodating various media sizes.
3Quantity of substance
If the tray is lowered to accommodate more sheets, then the loading capacity increases, but the transfer media mass exceeds motor performance
Solution Approach 1:
The patent makes the tray lowering limit dynamic rather than fixed. Instead of always lowering the tray to a fixed maximum position, the control unit adjusts the lowering limit dynamically based on the detected media length and calculated loading amount, ensuring the total mass remains within motor lifting capability while maximizing loading capacity for each media type.
Data Source
AI summary
A sheet feeding apparatus includes: a transfer medium loading tray that is movable vertically; a hardware processor configured to control vertical movement of the transfer medium loading tray; an overload detector configured to detect transfer media of a maximum loading amount prescribed for each type of the transfer media; and an intermediate tray position detector configured to detect the transfer medium loading tray being at an intermediate tray position prescribed for each type of the transfer media, wherein the hardware processor is configured to control the vertical movement of the transfer medium loading tray in accordance with a type of the transfer media and on a basis of a vertical position of the transfer medium loading tray, results of detection by the overload detector, and results of detection by the intermediate tray position detector.