Medium Transport Device With Overlapping Hinges for Independent Door Operation
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Solution Overview
Problem
Existing medium transport devices with outer and inner doors often face difficulties in closing the inner door while the outer door is open, and the separation of hinge positions leads to increased device size and accessibility issues.
Innovation Solution
The device design includes overlapping pivot axes for the outer and inner hinges, with the inner hinge positioned close to the outer hinge and inclined at an acute angle, allowing for easy access and attachment without interference from the outer door, and incorporating a regulation section to prevent excessive opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the position of the outer hinge and the position of the inner hinge are separated from each other, then the device tends to be larger, but it is desirable that the position of the outer hinge and the position of the inner hinge be near each other to maintain compact size
Solution Approach 1:
The patent merges the positions of the outer hinge and inner hinge by providing a common hinge axis that serves both doors. This allows both hinges to be located at the same position on the device main body, achieving compact device size while enabling independent operation of both doors through separate hinge bodies sharing the same pivot axis
2Device complexity
If an inner door is attached to an outer door as in the sheet transport device of JP-A-2002-356244, then the structure is simplified, but it is sometimes difficult to close the inner door while the outer door is open
Solution Approach 1:
The patent segments the hinge system into two independent hinge bodies (outer hinge and inner hinge) that share a common hinge axis. This segmentation allows the inner door to be operated independently from the outer door, enabling the inner door to be closed even when the outer door is open, while maintaining a compact structure through the shared axis
3Volume of moving object
If the outer door and inner door are positioned close together, then the device size is reduced, but accessibility to the inner hinge may be difficult
Solution Approach 1:
By merging the hinge positions and providing a common hinge axis, the patent eliminates the need for separate hinge mounting locations. The shared hinge structure allows both doors to be positioned close together for compact size while maintaining accessibility to the hinge mechanism through the common access point on the device main body
Data Source
AI summary
A medium transport device 1 including a device main body 12 having a transport path T for transporting a medium P, an outer door 30, an inner door 40 disposed with respect to the device main body 12 to the inside of the outer door 30, an outer hinge 31 that openably and closably attaches the outer door 30 to the device main body 12, and an inner hinge 41 that openably and closably attaches the inner door 40 to the device main body 12, wherein a pivot axis 15 of the outer hinge 31 and a pivot axis 5 of the inner hinge 41 both extend in a first direction and the outer hinge 31 and the inner hinge 41 overlap when viewed from a direction intersecting an outer door surface 30B of the outer door 30 in a closed state.