Sheet Stacker Marker Guide for Wind-Stable Bundle Separation
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Solution Overview
Problem
Existing sheet stacking devices face issues with markers being blown off by fan winds or air blowers, leading to defective stacking, marker ejection failures, and improper placement of markers on small-sized sheets.
Innovation Solution
A sheet stacking device with a guide mechanism that directs markers in the direction of fan winds, preventing them from being blown off and ensuring proper placement on sheet bundles, while using a movable guide to avoid interference with a liftable stacker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the marker is placed on the sheet bundle at the ejection height immediately above the uppermost sheet, then the marker can be placed on the sheet bundle, but the marker may be blown off by fan wind or air from the air blower
Solution Approach 1:
The guide is positioned to preemptively counteract the fan wind's effect on the marker. By placing the guide between the marker and the fan wind path, the system prevents the marker from being blown off before the harmful effect can occur, allowing reliable marker placement despite the presence of fan wind.
2Ease of operation
If the ejection height of the marker is away from the height of the sheet bundle, then the marker can be ejected, but the end of the marker close to the roll becomes suspended and sheet stacking height is erroneously detected
Solution Approach 1:
The guide acts as an intermediary element that bridges the gap between the marker ejection process and the sheet bundle. By providing a physical reference surface through which the marker passes during ejection, the guide ensures that the marker's position relative to the sheet bundle is properly established, preventing erroneous height detection while enabling successful marker ejection.
3Reliability
If the marker is connected to the roll until the subsequent transfer sheet is completely placed on the sheet bundle, then the marker is prevented from being blown off, but the marker may block the ejection port and cause ejection failure
Solution Approach 1:
The guide is positioned to provide preliminary support to the marker during the critical ejection phase. By having the guide in place before ejection occurs, the marker is supported throughout the ejection process and immediately upon contact with the sheet bundle, eliminating the need to maintain connection to the roll until complete sheet placement. This preliminary support enables timely cutoff and prevents ejection port blocking.
4Adaptability or versatility
If the stacker is raised excessively, then the stacker can accommodate varying sheet stacking heights, but the stacker may come into contact with the marking device
Solution Approach 1:
The guide is designed with vertical adjustability, allowing it to dynamically adapt its position based on the sheet stacking height. As the stacker raises to accommodate different sheet volumes, the guide can be repositioned vertically to maintain its function as a marker ejection reference while preventing interference with the marking device, enabling the system to handle varying stacking heights without collision.
Data Source
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AI summary
A sheet stacking device (8) includes a stacker (14), a conveyor (15), and a marking device (41). The stacker (14) stacks transfer sheets. The conveyor (15) conveys the transfer sheets toward the stacker (14) in a sheet conveyance direction. The marking device (41) includes a marker storage (35) to store a marker (34), an ejection port (35a) to eject the marker (34), a marker conveyor (36) to convey and eject the marker (34) from the ejection port (35a), and a guide (42) to prevent the marker (34) ejected from the ejection port (35a) from moving in a direction opposite to the sheet conveyance direction. The marking device (41) places the marker (34) on an uppermost sheet of each predetermined number of the transfer sheets on the stacker (14).