Feeding Device Second Holder Position Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sheet transport devices, the position of the second holder is not determined due to elastic deformation of the detachment assist spring, leading to instability in the configuration where the first and second holders are provided and the second holder is accommodated.
Innovation Solution
A feeding device is designed with a retard roller, a first holder that rotatably holds the retard roller, a second holder that holds the first holder to be swingable, and restricting portions that prevent movement of the second holder in both the retreat and opposite directions, ensuring its position is maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a detachment assist spring is used to enable easy removal of the second holder, then the ease of operation is improved, but the position stability of the second holder deteriorates due to elastic deformation
Solution Approach 1:
The movement restriction function is segmented into two independent components: a first restricting portion for the retreat direction and a second restricting portion for the opposite direction. This segmentation allows each component to be optimized for its specific function without interfering with the other, enabling stable position determination while maintaining ease of removal through the detachment assist spring.
Solution Approach 2:
Different restricting mechanisms are applied to different directions of movement: the first restricting portion (such as a hook portion) provides strong restriction in the retreat direction, while the second restricting portion (such as a restricting surface) provides guidance in the opposite direction. This local differentiation of restriction quality enables stable position determination while allowing easy removal when needed.
2Ease of operation
If only a first restricting portion is provided to prevent backward movement, then the ease of operation is improved, but the position stability in forward direction deteriorates
Solution Approach 1:
The movement restriction function is segmented into two independent components: a first restricting portion for the retreat direction and a second restricting portion for the opposite direction. This segmentation allows each component to be optimized for its specific function without interfering with the other, enabling stable position determination while maintaining ease of removal through the detachment assist spring.
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 suppresses the shifting of the second holder in both the retreat and opposite directions, maintaining its position and ensuring stable operation of the feeding device.
Implementation Method 1
the detachment assist spring is elastically deformed
Implementation Method 2
a first restricting portion that restricts movement of the second holder in the retreat direction; and a second restricting portion that restricts the movement of the second holder in a direction opposite to the retreat direction
Data Source
AI summary
A feeding unit includes a retard roller, a first holder, a second holder, an accommodating portion, a pressing portion, a second pressing portion, a release lever, and a second restricting portion. The accommodating portion accommodates the second holder. The second pressing portion presses the second holder in a +Z direction. The release lever restricts the movement of the second holder in the +Z direction. The second holder is provided with a plurality of restricted portions in a Y direction and a +A direction, respectively. The second restricting portion restricts the movement of the second holder in a −Z direction. The second restricting portion has a restricting surface. The restricting surface is provided in the accommodating portion and is configured to come into contact with the plurality of restricted portions.