Paper Feed Device Position Switch Mechanism
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Solution Overview
Problem
Existing paper feed devices require manual operation to pull out and lower the main body for paper bundle supply, making it time-consuming, especially for small paper additions, as the paper pressing lever is not withdrawn from the paper bundle unless the device is fully pulled out and lowered.
Innovation Solution
A paper feed device with a position switch portion that includes a movable member and a rotatable member, allowing the contact member to be moved between a withdrawn and contact position with respect to the paper bundle using the device's pull-out and push-in operations, enabling quick paper bundle supply and preventing paper movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the main body of the paper feed device is pulled out and the tray is lowered to the lower limit position to withdraw the paper pressing lever, then the paper bundle can be supplied to the tray, but it takes time and requires manual operation
Solution Approach 1:
The paper pressing lever is automatically withdrawn in advance when the tray is lowered, before the paper bundle supply operation is completed. This preliminary action eliminates the need for additional manual intervention to withdraw the lever, thereby reducing the time and complexity of the paper bundle supply operation while maintaining proper paper positioning functionality.
2Manufacturing precision
If the paper pressing lever remains in contact with the paper bundle during normal operation, then the uppermost sheet of paper can be positioned at the proper height, but the contact member prevents quick paper bundle replacement
Solution Approach 1:
The contact member is designed to dynamically change its position between contact and withdrawn states based on the operational requirements. During normal operation, it contacts the paper bundle to maintain proper positioning precision. During paper bundle replacement, it is automatically withdrawn to enable quick replacement. This dynamic adaptability resolves the contradiction between maintaining precision and enabling fast replacement.
Solution Approach 2:
The paper pressing lever automatically transitions between contact and withdrawn states based on the tray position, without requiring separate control operations. When the tray is lowered, the lever automatically withdraws; when the tray is raised, the lever automatically contacts the paper bundle. This self-service mechanism eliminates manual intervention and resolves the contradiction between precision positioning and fast replacement.
3Ease of operation
If the device requires full pull-out and lowering for paper bundle supply, then the paper pressing lever can be withdrawn, but additional operations are required even for small paper additions
Solution Approach 1:
The paper pressing lever is automatically withdrawn in advance when the tray is lowered, before the paper bundle supply operation is completed. This preliminary action eliminates the need for additional manual intervention to withdraw the lever, thereby reducing the number of operation steps and the complexity of the paper bundle supply operation.
Solution Approach 2:
The paper pressing lever automatically transitions between contact and withdrawn states based on the tray position, without requiring separate control operations. When the tray is lowered, the lever automatically withdraws; when the tray is raised, the lever automatically contacts the paper bundle. This self-service mechanism eliminates manual intervention and reduces operation steps, resolving the contradiction between ease of operation and device 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
Enables rapid paper bundle supply by allowing the contact member to be moved to the withdrawn position during pull-out and to the contact position during push-in, preventing paper upward movement and facilitating efficient paper transport.
Implementation Method 1
a fan that sucks air through air through holes of the paper transport belt, wherein an uppermost sheet of paper in the paper bundle is transported while being caused to adhere to the paper transport belt by sucking air through the air through holes of the paper transport belt
Data Source
AI summary
A paper feed device includes a paper stacking shelf, a paper trailing edge guide that regulates a position of a paper bundle, a contact member that is disposed on the paper trailing edge guide, and a position switch portion that moves the contact member to either a withdrawn away position or a contact position with respect to an upper face of the paper bundle. The position switch portion is provided with a rod that is moved in conjunction with an operation for causing the paper feed device to be pulled out from and pushed into the accommodation space, and a rotatable member that is rotated in conjunction with the movement of the rod. The position switch portion supports the contact member, and causes the contact member to be rotationally moved to either the withdrawn away position or the contact position in conjunction with the rotation of the rotatable member.