Rack Gear Driven Binding Unit Path Switching
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Solution Overview
Problem
Existing post-processing apparatuses face challenges in moving multiple binding units close to each other, switching paths without a movable dividing member at branching-off points, and stabilizing direction changes, especially in curved paths, leading to potential interference and movement restrictions.
Innovation Solution
A post-processing apparatus with a first and second binding unit that rotate gears, sharing a common path with rack gears that mesh with the respective gear, allowing for coordinated movement and path switching without a movable dividing member at branching-off points, and assisting in direction changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple binding units are provided to perform binding processing on multiple points, then productivity is improved, but the paths along which the binding units move overlap one another, causing interference and layout limitations
Solution Approach 1:
The common path is divided into first and second paths that branch off at a branching-off point, allowing binding units to be routed to different destinations without overlapping. This segmentation enables multiple binding units to operate independently while maintaining compact layout.
Solution Approach 2:
The path configuration transitions from a single-dimensional linear path to a two-dimensional branched path structure. By introducing path branching in addition to the linear progression, the system accommodates multiple binding units without increasing the overall footprint or causing interference.
2Adaptability or versatility
If a movable dividing member is provided at a branching-off point to switch paths, then path switching capability is improved, but switching control complexity increases
Solution Approach 1:
The movable dividing member is completely removed from the system. Instead of using a mechanical switch to direct binding units, the paths are designed to naturally diverge at a branching-off point, eliminating the need for active switching control while maintaining path routing flexibility.
Solution Approach 2:
The path branching structure automatically directs binding units to the appropriate path without requiring external control signals or switching mechanisms. The geometry of the paths themselves performs the routing function that would otherwise require an active dividing member.
3Area of stationary object
If the curved portion has a large curvature to reduce the dimension of the region, then the region size is reduced, but stable direction change becomes impossible
Solution Approach 1:
A curved guide surface is introduced at the branching-off point to assist binding units in changing direction smoothly. This curved surface provides geometric guidance that stabilizes direction changes while allowing the paths to remain compact. The curvature is optimized to balance space efficiency with directional stability.
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 efficient movement and path switching of binding units, preventing interference and movement restrictions, even in curved paths, by using rack gears to manage the movement of binding units along shared paths.
Implementation Method 1
a first rack gear that is provided along the common path and meshes with the first gear; and a second rack gear that is provided along the common path at a side opposite to the first rack gear with the common path interposed between the second rack gear and the first rack gear, and meshes with the second gear
Data Source
AI summary
A post-processing apparatus includes: a first binding unit that binds sheets and moves while rotating a first gear; a second binding unit that binds sheets and moves while rotating a second gear; a common path that is a path along which the first binding unit and the second binding unit move; a first rack gear that is provided along the common path and meshes with the first gear; and a second rack gear that is provided along the common path at a side opposite to the first rack gear with the common path interposed between the second rack gear and the first rack gear, and meshes with the second gear.