Sheet Conveyance Apparatus Drive Pulley Shaft Segmentation
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Solution Overview
Problem
In existing sheet conveyance apparatuses, excessive frictional load between the drive pulley shaft and guide member due to warping of the guide member leads to increased power consumption and elevated temperatures in the driving source, especially when conveying sheets with high stiffness.
Innovation Solution
The apparatus includes a rotary drive member supported on a rotatable shaft, with a guide member mounted to the shaft and a driven rotary member, allowing independent rotation of the drive pulley shaft and reducing the need for constant rotation, thus minimizing frictional load during sheet conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the guide member is retained on the drive pulley shaft and the shaft is driven to rotate while conveying the sheet, then the positional relationship between the conveyor belt and the guide member can be preferably retained, but in a case where the guide member is warped, the frictional load between the drive pulley shaft and the guide member becomes excessive
Solution Approach 1:
The drive system is segmented into two independent rotational components: the drive pulley shaft (first rotary member) and the guide member shaft (second rotary member). This segmentation allows each component to rotate independently, eliminating the excessive frictional load that occurs when the warped guide member is forced to rotate with the drive pulley shaft, while still maintaining the positional relationship between the conveyor belt and guide member through the belt connection.
2Productivity
If the drive pulley shaft is driven to rotate while conveying the sheet, then the sheet can be conveyed, but the frictional load increases and the power used by the driving source and the rising of temperature of the driving source becomes too high
Solution Approach 1:
The system transitions from a static connection where the guide member is fixed to the drive pulley shaft to a dynamic configuration where both the drive pulley shaft and guide member shaft can rotate independently. This dynamic arrangement reduces frictional resistance during sheet conveyance, thereby lowering power consumption and preventing excessive temperature rise in the driving source.
3Manufacturing precision
If the guide member is retained on the drive pulley shaft, then the positional relationship can be maintained, but required force for conveying the sheet is undesirably increased
Solution Approach 1:
By segmenting the drive system into two independently rotating shafts (drive pulley shaft and guide member shaft), the invention eliminates the excessive frictional force that occurs when a warped guide member is forced to rotate with the drive pulley shaft. The positional relationship is maintained through the belt connection, while the independent rotation of the guide member shaft reduces the required conveyance force.
Data Source
AI summary
A sheet conveyance apparatus includes a rotary drive member configured to rotate by receiving transmission of driving force from a driving source, a driven rotary member arranged with a predetermined distance in a sheet conveyance direction from the rotary drive member, an endless belt member supported on the rotary drive member and the driven rotary member, and configured to be rotated by a rotation of the rotary drive member, and a guide member configured to guide a sheet conveyed by the belt member. The guide member is mounted to a shaft configured to support the rotary drive member, and the rotary drive member is supported on the shaft in a rotatable manner with respect to the shaft.