Stapling Mechanism Center of Gravity Offset Prevents Plate Stranding
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Solution Overview
Problem
Conventional sheet postprocessing devices face issues with sheet-postprocessing failures due to the moving plate stranding on the base member, leading to increased manufacturing costs.
Innovation Solution
The sheet postprocessing device positions the center of gravity of the stapling means apart from the support point of the moving plate on the base member, preventing the moving plate from stranding and reducing manufacturing costs by optimizing the center of gravity's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If members are provided to prevent the moving plate's strands, then sheet-postprocessing failures are suppressed, but manufacturing cost increases due to increased parts count
Solution Approach 1:
The patent extracts and eliminates the problematic stranding mechanism by repositioning the support point relative to the center of gravity. Instead of adding preventive members, the design removes the root cause of stranding by ensuring the support point is positioned such that the moving plate cannot strand during reciprocating motion, thus suppressing failures without increasing parts count
Solution Approach 2:
The patent changes the positional parameter of the support point on the base member relative to the center of gravity of the stapling means. By optimizing this positional relationship, the moving plate's motion characteristics are improved, preventing stranding and enhancing reliability without adding complex preventive mechanisms
2Ease of operation
If the moving plate is moved integrally with the stapling means, then stapling operation is achieved, but the moving plate may strand on the base member causing processing failures
Solution Approach 1:
The patent applies preliminary action by pre-positioning the support point at an optimized location before operation begins. This preliminary positional arrangement ensures that during the reciprocating motion of the moving plate, the center of gravity remains properly positioned, preventing stranding from occurring in the first place and ensuring reliable stapling operation
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
This configuration effectively suppresses sheet-postprocessing failures while maintaining cost-effectiveness by preventing the moving plate from stranding on the base member, thus enhancing device reliability and reducing manufacturing expenses.
Implementation Method 1
A center of gravity of the stapling means is positioned apart in the sheet insertion direction from a support point of the base member for the moving plate
Data Source
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AI summary
The stapling means (31) drives stapler's staples (SP) into a bundle of sheets (T) inserted into a sheet-insertion recessed portion (313). The moving plate (32) is moved integrally with the stapling means (31) in a sheet widthwise direction (D2) perpendicular to a sheet insertion direction (D1) in which the bundle of sheets (T) is inserted into the sheet-insertion recessed portion (313). The base member (33) supports the moving plate (32) movably. The movement driving means (34) makes the moving plate (32) moved in the sheet widthwise direction (D2). The sheet postprocessing device (1) makes the stapling means (31) moved via the moving plate (32) by the movement driving means (34) so as to drive the stapler's staples (SP) into the bundle of sheets (T), thus fulfilling stapling process. A center of gravity (G) of the stapling means (31) is positioned apart in the sheet insertion direction (D1) from a support point (P) of the base member (33) for the moving plate (32).