Sheet Feed Apparatus Holder Vibration Damping
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Solution Overview
Problem
Existing sheet feed apparatuses often produce abnormal sounds due to vibration of the separation pad, which is not effectively addressed by existing vibration absorbing techniques or support methods.
Innovation Solution
A sheet feed apparatus with a holder that supports a separation pad, allowing it to change postures between releasing and forming a nip portion, using an urging member to maintain the nip pressure, and featuring a contact part that reduces vibration by sliding on inner wall parts, thereby minimizing abnormal sounds during sheet feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separation pad is used to convey sheets one by one through the nip portion, then sheet feeding reliability is improved, but abnormal sound occurs due to vibration of the separation pad
Solution Approach 1:
A holder is introduced as an intermediary component between the separation pad and the mount portion. The holder includes a contact part that contacts the inner wall parts of the mount portion, serving as a mediator to transmit and dampen vibration from the separation pad to the stationary mount structure, thereby reducing abnormal sound while preserving the sheet feeding function
Solution Approach 2:
The holder is designed as a simple, easily replaceable component that can be disposed of or replaced without affecting the main apparatus. This allows the holder to absorb vibration and wear over time, protecting the more expensive and complex separation pad and sheet feed roller assembly
2Adaptability or versatility
If the holder is made movable to change postures between releasing and forming nip portion, then operational flexibility is improved, but device complexity increases
Solution Approach 1:
The holder is designed with movable elements that can change posture between a first posture (releasing nip portion) and a second posture (forming nip portion). This dynamic capability allows the holder to adapt to different operational states while maintaining a relatively simple overall structure through clever mechanical design
Solution Approach 2:
The holder is divided into multiple functional parts: a body portion that supports the separation pad, and a contact part that interacts with the mount portion. This segmentation allows independent optimization of each part's function while reducing overall complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces vibration and abnormal sounds during sheet feeding, ensuring stable sheet conveyance and maintaining the nip position, enhancing the operational performance of the sheet feed apparatus.
Implementation Method 1
an urging member configured to urge the separation pad toward the sheet feed roller via the holder in a mounted state where the holder is mounted to the mount portion
Implementation Method 2
The holder includes a contact part that contacts the mount portion when the holder is in the second posture
Data Source
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AI summary
In a sheet feed apparatus, sheet feed roller (461) is provided in casing so as to face downstream side of sheet stacking portion (46A) in sheet conveying direction, and conveys sheets in sheet conveying direction. Separation pad (71) is provided facing sheet feed roller, forms, with sheet feed roller, nip portion through which sheets pass, and conveys sheets one by one in sheet conveying direction. Holder (72) fixes and supports separation pad. Mount portion (100S) )mounts holder. An urging member (73) urges separation pad toward sheet feed roller via the holder. Holder is changeable in its posture between a first posture in which separation pad is spaced apart from sheet feed roller so as to release nip portion having been formed therebetween, and a second posture in which nip portion is formed between separation pad and sheet feed roller. Holder includes a contact part (721E) that contacts the mount portion in the second posture.