Printing Press Sheet Holding Device with Cam Mechanism
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Solution Overview
Problem
Conventional sheet-like member holding devices for printing presses require operators to move grippers and gripper pads, leading to operational burdens and potential failures such as misregistration.
Innovation Solution
A sheet-like member holding device that allows attachment and detachment of the sheet-like member without moving the gripper or gripper pad, utilizing a non-metal sheet with a handle and holding units that secure the sheet to the printing cylinder using a cam mechanism and holding units, enabling easy attachment and detachment by gripping the handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gripper and gripper pad are moved to attach the protection sheet, then the protection sheet can be held, but the operational burden increases and failures occur
Solution Approach 1:
The invention extracts the sheet holding function from the gripper mechanism by introducing a separate protection sheet holding device with holding members that independently secure the protection sheet to the printing cylinder, eliminating the need to move the gripper and gripper pad for sheet attachment
Solution Approach 2:
The invention segments the sheet handling system into two independent parts: the gripper for sheet feeding and the holding members for protection sheet attachment. This segmentation allows each component to perform its specific function without interfering with the other, improving both reliability and ease of operation
2Ease of manufacture
If the gripper pad is separated from the side wall to allow sheet passage, then the sheet can be attached, but the gripper may fail or misregister
Solution Approach 1:
The invention extracts the sheet passage function from the gripper pad mechanism by providing dedicated holding members that create passage spaces independently, allowing the gripper pad to remain in its original position and maintain its reliability
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
Enables simple and reliable attachment and detachment of the sheet-like member, reducing operator load and preventing gripper-related failures, while maintaining secure positioning on the printing cylinder.
Implementation Method 1
a cam mechanism for moving the sheet holding member forward and backward in the radial direction of the printing cylinder
Data Source
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AI summary
A sheet-like member holding device (70) includes a first holding unit (71) disposed between a gripper receiving portion (49) and a side wall (59a) of a gap (41), and configured to hold a base (67) of a non-metal sheet (62). The first holding unit (71) includes a space (S1) in which the base (67) is inserted while the non-metal sheet (62) extends inward in a radial direction from an outer surface side of a printing cylinder (17), and an abutment wall (72) configured to restrict movement of the base (67) to the outside in the radial direction. An end portion of the space (S1) in an axial direction of the printing cylinder (17) is open to the outside. This makes it possible to attach and detach the non-metal sheet (62) by a simple method without moving a gripper member (44) or gripper pad (45).