Stapler Movable Stage for Stable Binding Position

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Solution Overview

Problem

Existing electric staplers with fixed binding tables experience unstable binding due to changing sheet areas and binding position deviations, especially when sheets are inserted quickly, leading to inconsistent stapling.

Innovation Solution

A stapler design featuring a movable stage with an engaging portion and a sheet detecting sensor that adjusts to maintain a consistent binding position, allowing sheets to be supported over a range of positions without changing the supported area, regardless of insertion speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the binding position on sheets is moved away from the clinch groove, then the sheets can be bound at different positions, but the area of the portion to be placed on the binding table becomes large causing unstable binding

Engineering Contradiction:

Improvebinding position adjustmentVSAvoidbinding stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The binding table is made movable relative to the sheets instead of being fixed. The binding table can move in the direction of sheet insertion, allowing the supported area to dynamically adjust according to the binding position, thereby maintaining stable binding regardless of where on the sheet the stapling occurs.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

A sensor arm acts as an intermediary between the sheet end and the control system. The sensor arm detects the position of the sheet end and transmits this information to control the binding table's movement, enabling automatic adjustment of the binding table position based on sheet placement.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If sheets are quickly inserted, then productivity increases, but the binding position deviates from the desired position due to excessive insertion during detection and striking response time

Engineering Contradiction:

Improveinsertion speedVSAvoidbinding position accuracy

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The sensor arm detects the sheet end position in advance before the binding operation is initiated. By detecting the sheet position preliminarily and using this information to pre-position the binding table, the system compensates for the time delay between detection and striking, ensuring accurate binding position even during quick insertion.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The sensor arm provides real-time feedback on sheet end position to the control system. This feedback mechanism allows the binding table to adjust its position dynamically based on actual sheet placement, correcting for variations caused by different insertion speeds and ensuring consistent binding accuracy.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS7857182B2Stapler

Publication Date: 2010.12.28 MAX CO LTD

AI summary

A stapler includes a binding table, a clinch member disposed on the binding table, a staple striking unit disposed above the binding table, and a movable stage disposed so as to be slidable with respect to the binding table. The movable stage is formed with an engaging portion, and the engaging portion positions an end portion of sheets placed on the movable stage. The sheets are inserted and bound between the clinch member and the staple striking unit.