Suction Clinging Mechanism for Stable Medium Transport
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Solution Overview
Problem
Existing medium transport apparatuses, such as those disclosed in JP-A-2008-266020, face instability in transporting media due to insufficient clinging power when holes on the transport belt are not covered by the medium during switchback transportation, leading to potential failure in transporting media stably.
Innovation Solution
A medium transport apparatus with a loop-shaped transport belt featuring a suction clinging mechanism comprising a first and second suction chamber, where the distance from the switching position to the opening of the first suction chamber is longer than the length of each hole, ensuring that holes not covered by the medium do not communicate with the suction chamber, maintaining clinging power and enabling stable transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transport belt has holes for suction clinging, then the medium can be clung to the belt, but if holes are not covered by the medium during switchback transport, air enters the holes and clinging power decreases
Solution Approach 1:
The suction mechanism is divided into two separate suction chambers (first and second suction chambers) positioned at different locations along the transport belt. This segmentation allows independent control of suction zones, enabling the system to maintain clinging power in covered holes while allowing air entry in uncovered holes without affecting overall transport stability.
Solution Approach 2:
The medium is positioned to cover the holes in the first suction chamber before the switching position is reached, ensuring that clinging power is established in advance. This preliminary covering action prevents air from entering the first suction chamber holes during the critical switching phase, maintaining stable transport.
2Adaptability or versatility
If switchback transportation is used to change transport direction, then the medium can be transported in both directions, but the medium may not be transported stably when clinging power decreases
Solution Approach 1:
Different regions of the transport belt are assigned different functions: the first suction chamber region maintains strong clinging power for direction switching, while the second suction chamber region provides additional clinging support. This local differentiation ensures that clinging power is maintained at critical locations during switchback operations, enabling stable bidirectional transport.
Solution Approach 2:
The transport belt acts as an intermediary between the suction chambers and the medium, with its holes serving as controlled interfaces. By regulating which holes are covered by the medium at different positions, the system mediates between the suction force and air entry, maintaining optimal clinging power during direction changes.
3Loss of time
If the distance from switching position to first suction chamber opening is short, then the response time is reduced, but holes not covered by medium communicate with suction chamber causing clinging power loss
Solution Approach 1:
The medium is positioned to cover the holes in the first suction chamber before the switching position is reached, ensuring that clinging power is established in advance. This preliminary covering action prevents air from entering the first suction chamber holes during the critical switching phase, maintaining stable transport.
Solution Approach 2:
The system dynamically adjusts the covering status of holes by different suction chambers based on the position of the medium. The first suction chamber holes are covered when the medium is in the switching zone, while the second suction chamber holes remain uncovered to allow air entry. This dynamic configuration optimizes both response time and clinging power maintenance.
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 solution ensures stable transportation of media by maintaining clinging power during direction switches, preventing air from entering uncovered holes and ensuring consistent clinging to the transport belt, thus preventing transport failures.
Implementation Method 1
a suction clinging mechanism that includes an opening of a first suction chamber and an opening of a second suction chamber that is located upstream of the opening of the first suction chamber in the first transporting direction, the opening of the first suction chamber and the opening of the second suction chamber drawing air through the holes
Implementation Method 2
the suction clinging mechanism causes the medium to cling to the transport belt
Data Source
AI summary
A transport mechanism includes a transport belt in which holes are formed and a suction clinging mechanism. The transport mechanism transports the medium in the first transporting direction, and when the upstream edge reaches a switching position, the transport mechanism transports the medium in the second transporting direction and stacks the medium in a stacker. The suction clinging mechanism includes an opening of a first suction chamber and an opening of a second suction chamber, and the opening of the first suction chamber is located downstream of the opening of the second suction chamber in the first transporting direction. The switching position is located upstream of the opening of the first suction chamber in the first transporting direction. In the first transporting direction, the distance from the switching position to the opening of the first suction chamber is longer than the length of each hole.