Dynamic Table Link Rigidity in Staplers for Thick Sheet Binding
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Solution Overview
Problem
Existing staplers maintain constant rigidity in the table link regardless of the thickness of the sheet bundle, leading to inefficiencies in motor load and potential staple lifting during binding operations.
Innovation Solution
A stapler design that adjusts the rigidity of the table link based on the thickness of the sheet bundle by altering the position where a regulation portion abuts against the table link, allowing for higher rigidity with thicker bundles and lower rigidity with thinner bundles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the table link is designed with high rigidity to withstand maximum driving load, then the reliability of staple penetration is improved, but the motor current load increases during clinching operation
Solution Approach 1:
The table link's rigidity is made dynamic rather than static. The regulation portion allows the table link to adjust its effective length and rigidity during operation - maintaining high rigidity during staple penetration, then becoming more flexible during clinching to absorb excess stroke without excessive motor load.
Solution Approach 2:
The physical parameter of table link rigidity is changed during operation. By varying the effective length of the table link through the regulation portion's movement, the rigidity parameter is adjusted to match the operational requirements - high for penetration, lower for clinching.
2Manufacturing precision
If the table link rigidity is increased to prevent staple crown lifting, then the manufacturing precision of binding is improved, but the motor power requirement increases
Solution Approach 1:
The table link transitions from a static rigid structure to a dynamic structure that adjusts its rigidity characteristics. The regulation portion enables this dynamic adjustment, allowing the system to achieve high precision during penetration while reducing power consumption during clinching.
Solution Approach 2:
The rigidity parameter of the table link is changed during the binding operation. The regulation portion's movement alters the effective length, thereby changing the rigidity parameter to optimize both precision and power efficiency at different stages.
3Ease of manufacture
If the table link is designed with constant rigidity, then the ease of manufacture is improved, but the adaptability to different sheet bundle thicknesses deteriorates
Solution Approach 1:
Instead of manufacturing multiple table links with different rigidities, a single table link is made dynamic through the regulation portion. This allows one component to adapt to various sheet bundle thicknesses, maintaining ease of manufacture while improving versatility.
Solution Approach 2:
The table link with regulation portion serves multiple functions - it provides high rigidity for thick bundles, lower rigidity for thin bundles, and maintains structural integrity throughout. This multi-functionality eliminates the need for multiple specialized components.
Data Source
AI summary
There is provided a stapler including: a driving portion that drives a staple into a sheet bundle; a clinch portion that bends a leg portion of the staple driven into and penetrating the sheet bundle; a table link that supports the clinch portion at a position facing the driving portion and move the clinch portion in a first direction where the clinch portion separated from and brought into contact with the driving portion; a motor that drives the driving portion; and a regulation portion that moves in a second direction intersecting the first direction while abutting against the table link and regulate a movement of the clinch portion in a direction away from the driving portion. A position where the regulation portion abuts against the table link changes in a direction toward the clinch portion as the clinch portion and the driving portion are separated from each other.