Crimping Member Attachment for Sheet Binding Stability
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Solution Overview
Problem
Conventional crimping sheet binding devices face issues with unstable binding force due to attachment errors of crimping members, leading to uneven engagement and potential tearing or weak binding.
Innovation Solution
A method for attaching crimping members, such as toothed dies, where one member is attached to a movable link with a through-hole that allows for a gap larger than the position error, ensuring proper engagement and preventing deviation from the intended position, and using longer teeth for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If crimping members are attached to members using conventional attachment methods, then the attachment process is simple, but the crimping members may be attached in positions deviated from their original engagement position, leading to unstable binding force
Solution Approach 1:
The crimping members are attached to the member in a state where the pair of crimping members is already in engagement. This preliminary engagement ensures that the attachment position is precisely determined by the engagement relationship itself, eliminating position deviation without requiring complex attachment structures or high-precision machining.
Solution Approach 2:
The engagement relationship between the pair of crimping members serves as its own attachment reference. The crimping members' mutual engagement automatically defines the correct attachment position, making the attachment process self-aligning and eliminating the need for external positioning mechanisms or complex fixture systems.
2Reliability
If crimping members are attached with tight tolerances to ensure precise engagement, then binding stability improves, but the attachment process becomes more difficult and time-consuming
Solution Approach 1:
By establishing the engagement relationship before attachment, the patent ensures that the crimping members are already positioned correctly relative to each other. This preliminary engagement state guarantees reliable binding stability while allowing the attachment process to proceed with normal tolerances, as the engagement geometry itself provides the precise positioning.
Solution Approach 2:
The engagement relationship acts as an intermediary that transfers the positioning function from the attachment structure to the crimping members themselves. Instead of relying on the attachment structure to maintain precise positions, the engagement relationship between crimping members serves as the intermediary mechanism that ensures stable binding with conventional attachment methods.
3Manufacturing precision
If crimping members are attached after engagement positioning, then position accuracy is improved, but the attachment process requires additional steps
Solution Approach 1:
The patent performs the positioning action (engagement) before the attachment action, which is the reverse of conventional sequences. This preliminary engagement establishes the precise position relationship, and then attachment simply secures this already-established position. This sequence improves position accuracy while maintaining efficiency because the engagement process itself is a natural part of the crimping mechanism's operation.
Solution Approach 2:
The patent merges the positioning function and the attachment function into a unified process sequence. The engagement relationship that provides positioning is the same engagement that will perform the binding function, eliminating the need for separate positioning and attachment operations. This merging improves both position accuracy and productivity by consolidating steps.
Data Source
AI summary
The present invention is concerning a method for attaching a pair of crimping members in a sheet binding device that binds a sheet bundle by engagement of the pair of crimping members, wherein at least one of the crimping members is attached to a member to which the one of the crimping members is to be attached in a state where the pair of crimping members is in engagement.