Carriage Moving Mechanism Frame Support for Large Printers
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Solution Overview
Problem
Large-sized liquid discharge apparatuses face deformation issues due to increased moment acting on the frame, leading to instability in the carriage moving mechanism, which affects the proper movement of the recording head and image quality.
Innovation Solution
The carriage moving mechanism is redesigned with a third support member that is rigid and aligned in a specific configuration to prevent deformation, ensuring that the tension applied to the annular belt acts in a manner that minimizes bending deformation, even when the distance between support members is long.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the frame is made long in length to accommodate large-sized liquid discharge apparatus, then the apparatus can handle larger formats, but the moment acting on the frame is enlarged causing frame deformation
Solution Approach 1:
The frame is divided into multiple sections with intermediate support members positioned between the driving pulley support and driven pulley support. This segmentation reduces the span length of each frame section, thereby reducing the moment acting on each section and preventing deformation while still accommodating large apparatus size.
Solution Approach 2:
The intermediate support members are positioned at different locations along the belt path, creating a multi-dimensional support structure. This allows the frame to maintain stability in the critical direction (perpendicular to belt tension) while still providing the necessary long travel distance for large-format operation.
2Length of stationary object
If the distance between point of action and fulcrum is increased to accommodate larger apparatus, then the apparatus can be larger, but the moment acting on the frame is enlarged
Solution Approach 1:
The long frame is segmented into multiple shorter sections by introducing intermediate support members. Each section has a reduced length, which directly reduces the moment arm and consequently the moment acting on each section, while the overall apparatus remains large through the cumulative effect of multiple sections.
Solution Approach 2:
Intermediate support members act as mediators between the driving and driven pulley supports. These intermediaries provide additional support points that reduce the effective span length, thereby reducing the moment acting on the frame sections without compromising the overall apparatus size.
3Volume of moving object
If the frame is made long to support large-sized apparatus, then larger format is possible, but the carriage movement stability deteriorates
Solution Approach 1:
The frame is segmented into multiple sections with intermediate support members that provide additional support points along the carriage path. This segmentation reduces the span length and minimizes frame deformation, thereby maintaining carriage movement stability even in large-format apparatus.
Solution Approach 2:
Instead of making the entire frame rigid and long (which causes deformation), the solution inverts the approach by using multiple shorter, supported sections. This inverted strategy achieves the necessary long travel distance while maintaining stability through distributed support rather than continuous rigidity.
4Volume of moving object
If the frame length is increased for large-sized apparatus, then larger format is achieved, but image quality deteriorates due to frame deformation
Solution Approach 1:
The frame is divided into multiple sections with intermediate support members that prevent excessive deformation in each section. This ensures that the recording head maintains precise positioning throughout its travel, thereby maintaining image quality in large-format apparatus.
Solution Approach 2:
The intermediate support members provide localized support at critical positions along the frame, ensuring that each local section maintains its structural integrity and dimensional stability. This local reinforcement prevents deformation that would otherwise affect image quality, while allowing the overall apparatus to remain large.
Data Source
AI summary
A carriage moving mechanism including a driving unit including a driving pulley, a driving motor, and a first support member for supporting both the driving pulley and the driving motor, a driven unit including a driven pulley and a second support member for supporting the driven pulley, and a third support member supporting both the driving unit and the driven unit, an annular belt that is wound around both the driving pulley and the driven pulley, a first outer peripheral surface and a second outer peripheral surface facing to the first outer peripheral surface, and a first carriage that is attached to the first outer peripheral surface, wherein the second support member, the third support member, and the first support member are aligned in this order in a first axis, and the third support member is disposed inside the annular belt.