Rotary Blade Guide Member Structure for Smooth Sheet Handling
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Solution Overview
Problem
Existing sheet processing apparatuses fail to provide smooth movement of the guide member due to rotation of the movable guide member, leading to torsion and operation failure.
Innovation Solution
A sheet processing apparatus with a rotary blade unit that includes a guide member supported by a rotation shaft and a rotation stopper to prevent rotation, ensuring smooth movement of the guide member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movable guide member is disposed on the rotation shaft to support the sheet, then the sheet support function is improved, but the guide member rotates along with the rotation shaft and cannot maintain its posture
Solution Approach 1:
The guide member is divided into a fixed guide member (attached to the rotation shaft) and a movable guide member (sliding on the fixed guide member). This segmentation allows the fixed part to rotate with the shaft while the movable part maintains its posture independently through sliding movement.
Solution Approach 2:
The fixed guide member acts as an intermediary between the rotation shaft and the movable guide member. It transmits rotational movement from the shaft while allowing the movable guide member to slide and maintain its orientation, thus mediating between rotation and positional stability.
2Stability of the object's composition
If support rails are provided over the entire width to prevent rotation of the guide member, then rotation prevention is improved, but torsion occurs between the rotation shaft and support rail due to separation in radial direction
Solution Approach 1:
The support structure is segmented into a fixed guide member that prevents rotation and a movable guide member that slides on it. This segmentation eliminates the torsion problem by allowing independent movement of the sliding portion while maintaining rotational prevention at the fixed portion.
Solution Approach 2:
The guide member transitions from a static locked structure to a dynamic sliding structure. The movable guide member can slide along the fixed guide member, allowing dynamic adjustment while maintaining rotational prevention, thus eliminating torsion stresses.
3Stability of the object's composition
If the guide member is locked to the support rail to prevent rotation, then rotation prevention is improved, but the guide member cannot move smoothly due to torsion and rubbing
Solution Approach 1:
The guide member is designed with a movable portion that slides on the fixed guide member, transforming the static locked connection into a dynamic sliding connection. This allows the guide member to move smoothly in the axial direction while the fixed portion maintains rotational prevention.
Solution Approach 2:
The fixed guide member serves as an intermediary that provides a sliding surface for the movable guide member. This intermediary structure enables smooth movement while maintaining rotational stability, resolving the conflict between movement ease and rotation prevention.
Data Source
AI summary
A sheet processing apparatus processes a sheet by using a rotary blade. The sheet processing apparatus includes: a rotary blade unit that supports the rotary blade such that the rotary blade is rotatable on a rotation shaft and movable in an axial direction of the rotation shaft; a guide member that is supported by the rotation shaft and that guides part of the sheet; and a rotation stopper that prevents rotation of the guide member. The rotation stopper is mounted on the rotary blade unit.