Adjustable Gripper Sheet Conveyance Mechanism
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Solution Overview
Problem
Existing sheet conveying devices face challenges in accurately gripping and conveying sheets of varying thicknesses, often resulting in misalignment or flapping due to insufficient adjustment mechanisms, particularly when handling thinner sheets.
Innovation Solution
The implementation of an adjustment mechanism that includes a movable guide and a motor-driven mechanism to adjust the sheet entering range of the gripper in a direction intersecting the sheet surface, ensuring precise positioning and grip of the sheet leading end, thereby preventing flapping and ensuring consistent grip timing across different sheet thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed gripper position is used on a rotary conveyor, then the device structure is simple, but sheets of varying thickness cannot be accurately gripped, resulting in misalignment or flapping
Solution Approach 1:
The gripper is made adjustable in the sheet thickness direction through a drive mechanism, transforming it from a fixed static component to a dynamic one that can adapt its position. This allows the gripper to accommodate sheets of varying thicknesses by changing its gripping position along the rotary conveyor, resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
The system changes the positional parameter of the gripper in the sheet thickness direction based on the detected sheet thickness. By adjusting the gripper's position parameter dynamically, the system achieves adaptability to different sheet thicknesses without requiring complete redesign for each thickness variation.
2Manufacturing precision
If the gripper position is adjusted for thicker sheets, then thick sheets are gripped accurately, but thinner sheets may flap or misalign due to excessive grip depth
Solution Approach 1:
A detection mechanism detects the actual sheet thickness and provides feedback to the control system. Based on this feedback, the drive mechanism adjusts the gripper position to the appropriate depth for gripping. This closed-loop feedback control ensures that the gripper penetrates sufficiently for thick sheets while avoiding excessive depth that would cause flapping in thin sheets, thus achieving precision without harmful effects.
Solution Approach 2:
The system performs preliminary detection of sheet thickness before the gripping action occurs. By detecting the sheet thickness in advance and pre-positioning the gripper at the correct depth, the system prevents flapping and misalignment issues before they occur, ensuring accurate gripping for both thick and thin sheets.
3Measurement precision
If manual adjustment of gripper position is used, then device complexity is low, but adjustment precision and consistency across different sheet types are insufficient
Solution Approach 1:
The manual mechanical adjustment process is replaced with an automated system combining detection mechanism, drive mechanism, and control unit. The detection mechanism measures sheet thickness precisely, and the control unit automatically commands the drive mechanism to position the gripper, eliminating manual adjustment limitations and achieving high precision and consistency.
Solution Approach 2:
The system performs self-adjustment of the gripper position based on automatic detection of sheet thickness. The detection mechanism and drive mechanism work together in an automated loop where the system adjusts itself without external intervention, achieving consistent precision across different sheet types while reducing operational complexity.
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 prevents sheet flapping and ensures accurate grip and conveyance of sheets by adjusting the sheet entering range based on thickness, maintaining proper alignment and reducing the likelihood of misalignment during the conveyance process.
Implementation Method 1
an adjustment mechanism that includes a movable guide and a motor-driven mechanism to adjust the sheet entering range of the gripper
Implementation Method 2
The gripper is mounted on the rotary conveyor, the gripper configured to grip a leading end of the sheet
Data Source
AI summary
A sheet conveying device includes a sheet conveyor, a guide, a rotary conveyor, a gripper, and an adjuster. The sheet conveyor is configured to convey a sheet. The guide is configured to guide the sheet conveyed by the sheet conveyor. The rotary conveyor is disposed downstream from the guide in a sheet conveyance direction. The gripper is mounted on the rotary conveyor, the gripper configured to grip a leading end of the sheet. The adjuster is configured to adjust a sheet entering range of the gripper to which the leading end of the sheet enters, along with conveyance of the sheet conveyor, in a direction intersecting a sheet surface.