Sheet Conveying Apparatus Hinge Alignment and Tilt Control
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Solution Overview
Problem
The existing sheet conveying apparatuses, where an opening/closing member is rotatably supported by a frame via hinges, often tilt due to the weight of the member, leading to interference with other components and reduced operability, causing abnormal noise during movement between open and closed positions.
Innovation Solution
The apparatus includes a frame with a first and second hinge, where the first hinge has a first hole portion and a second hole portion on the rotating member, and the second hinge has a third hole portion and a fourth hole portion, with engaging holes and scales positioned to counteract the tilting effect of the rotating member's weight, ensuring proper alignment and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the opening/closing member is rotatably supported by hinges with clearance, then assembly is easier, but the member tilts due to weight and backlash
Solution Approach 1:
A wedge-shaped member is introduced as an intermediary between the opening/closing member and the frame. This wedge member fills the clearance in the hinge hole, eliminating backlash and preventing tilting caused by the weight of the opening/closing member, while still allowing easy assembly through the hinge structure
Solution Approach 2:
The wedge-shaped member is preliminarily positioned to counteract the gravitational force acting on the opening/closing member. By pre-filling the clearance with the wedge member, the system prevents the tilting that would otherwise occur due to weight and hinge clearance
2Strength
If the opening/closing member is made heavier for structural integrity, then strength is improved, but tilting and interference with other components worsens
Solution Approach 1:
The wedge-shaped member acts as a counterweight mechanism by providing mechanical support that counteracts the gravitational force on the opening/closing member. This allows the member to be sufficiently heavy for structural integrity while the wedge prevents the weight-induced tilting that would cause interference with other components
3Manufacturing precision
If the hinge clearance is reduced for precision, then alignment is improved, but assembly difficulty increases
Solution Approach 1:
The hinge system is segmented into multiple components: the hinge pin, the hinge hole in the frame, the hinge hole in the opening/closing member, and the wedge-shaped member. This segmentation allows each component to be manufactured with standard tolerances for easy assembly, while the combination of all components achieves high alignment precision by eliminating cumulative clearance
Data Source
AI summary
Disclosed is a sheet conveying apparatus which includes a rotating member rotatably supported with respect to a frame by a first hinge and a second hinge such that the rotating member is rotatable between a first position where a conveying member for conveying a sheet is covered and a second position where the conveying member is exposed. In the horizontal direction, a position where a first portion of the first hinge is arranged is substantially the same as that of a third portion of the second hinge, and a fourth portion of the second hinge is arranged with respect to the second portion of the first hinge such that a center position of a second scale is located at a position farther from a gravity center of the rotating member than a center position of a first scale.