Tiltable Steering Roller Belt Tracking Mechanism
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Solution Overview
Problem
In image forming apparatuses, endless belts without ribs fail to detect movement in the width direction, leading to potential misalignment and poor image quality, as existing detection mechanisms rely on rib contact with detection rollers.
Innovation Solution
A belt driving device with a tiltable steering roller and link mechanism, where a wheel at the end of the drive roller moves outward when the belt shifts, tilting the steering roller to correct misalignment by redistributing tension and ensuring detection even without ribs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ribs are provided on the endless belt for detection, then movement detection capability is improved, but belt structure complexity increases and rib depletion leads to detection failure
Solution Approach 1:
The patent extracts the detection function from the belt structure itself (ribs) and transfers it to a separate detection roller mechanism. The steering member is tiltable and works with the detection roller to sense belt position, eliminating the need for ribs on the belt while maintaining detection capability.
Solution Approach 2:
The patent introduces a detection roller as an intermediary component between the belt and the control system. This detection roller, in conjunction with the tiltable steering member, mediates the detection process by contacting the belt surface and converting positional information into detectable signals without requiring structural modifications to the belt.
2Manufacturing precision
If the steering member is fixed, then structural simplicity is maintained, but misalignment correction capability is lost
Solution Approach 1:
The patent applies the dynamics principle by making the steering member tiltable rather than fixed. The steering member can rotate about a pivot axis in response to detection roller feedback, enabling dynamic adjustment of belt alignment. This dynamic capability allows real-time correction of misalignment while maintaining structural simplicity through a single degree of freedom motion.
3Measurement precision
If detection roller contacts ribs on belt, then movement detection is achieved, but detection fails when ribs are depleted or absent
Solution Approach 1:
The patent implements self-service by designing the detection roller to contact the belt surface directly without requiring auxiliary ribs. The tiltable steering member automatically adjusts its position based on belt location, enabling the system to detect and correct alignment issues independently without external structural modifications to the belt.
Data Source
AI summary
An imaging system includes a pair of belt rollers, a steering roller, a wheel, and a link mechanism. The pair of belt rollers includes a first roller and a second roller to drive an endless belt along a belt path. The steering roller is between the first roller and the second roller. The steering roller is tiltable to engage the endless belt. The wheel is at an end of the first roller in abutment with an edge of the endless belt, to move in an outward direction along a rotation axis of the first roller, when the endless belt shifts away from the belt path toward the wheel. The link mechanism is between the wheel and the steering roller to tilt the steering roller in response to a sliding movement of the wheel in the outward direction, to urge the endless belt to shift toward the belt path.