Grooved Roll Sheet Feeding Apparatus with Guide Members
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Solution Overview
Problem
Existing sheet material feeding apparatuses face challenges in accurately feeding thin sheet materials to press apparatuses due to flexure and winding issues around rolls, which hinder the feeding process and affect the precision of the feeding length.
Innovation Solution
A sheet material feeding apparatus featuring a pair of rolls with circumferential grooves and guide members that extend along the conveyance path, preventing flexure and winding by guiding the sheet material between the grooves and rolls, ensuring stable and accurate feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pair of rolls interpose a thin sheet material with sufficient interposing force to feed it with friction force, then the sheet material can be conveyed, but the sheet material is liable to readily wind round the roll
Solution Approach 1:
The roll surface is segmented into multiple circumferential grooves that divide the contact area with the sheet material. This segmentation distributes the friction force across multiple smaller contact zones, preventing excessive force concentration that would cause the thin sheet to wind around the roll, while still maintaining sufficient total friction for reliable feeding.
Solution Approach 2:
The roll surface is modified with circumferential grooves that create localized contact regions. These grooves provide specific local properties (reduced contact pressure in groove areas, concentrated contact at ridge areas) that prevent sheet winding while maintaining overall feeding capability through distributed friction engagement.
2Stability of the object's composition
If sheet material guide means guides the sheet material upstream and downstream of the pair of rolls, then flexure of the sheet material is restricted, but it is difficult to prevent flexure and winding of the sheet material round the roll due to wide space between guide means and rolls
Solution Approach 1:
The circumferential grooves on the roll surface act as intermediary structures between the sheet material guide means and the roll body. These grooves provide additional guidance points that actively constrain the sheet material during the critical feeding zone, preventing both flexure and winding without requiring the guide means to be positioned extremely close to the rolls.
Solution Approach 2:
The solution moves from a two-dimensional guide structure (upstream/downstream only) to a three-dimensional constraint system by adding circumferential grooves that wrap around the roll. This creates guidance in the circumferential dimension as well, providing multi-directional constraint that prevents sheet material deviation, flexure, and winding more effectively.
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
The apparatus effectively prevents flexure and winding of thin sheet materials, enabling smooth and precise feeding to work machines, enhancing the accuracy and reliability of the feeding process.
Implementation Method 1
a pair of rolls interpose therebetween the sheet material with a sufficient interposing force to feed the same with a friction force
Implementation Method 2
the guide portions guide a sheet material when the sheet material passes between the pair of rolls
Data Source
AI summary
A sheet material feeding apparatus capable of favorably guiding a sheet material to perform smooth feeding comprises a pair of rolls and first and second guide members and permits a sheet material to pass between the first guide member and the second guide member. One of the rolls has a plurality of circumferential grooves arranged between both ends of a sheet material feeding surface in an axial direction and spaced from one another in the axial direction, and the first guide member includes guide portions passing through the respective circumferential grooves and extending continuously to a downstream side from an upstream side between the pair of rolls in a sheet-material conveyance direction.