Sheet Stacking Apparatus with Pressurizing Spindle Drive
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Solution Overview
Problem
Existing sheet stacking apparatuses require multiple drives and complex control systems, leading to high manufacturing costs and energy consumption due to the need for separate drives for transport rollers, sector cylinders, and support mechanisms.
Innovation Solution
A displaceable support with a pressurizing spindle that alternately shifts and releases the support, eliminating the need for additional drives and control systems by using a single drive for the spindle, which displaces the support by the thickness of each sheet, allowing sheets to be stacked without moving them, thus reducing operational costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple drives are used for transport rollers, sector cylinder, and support mechanism, then the stacking function is reliable, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple drive functions into a single drive mechanism. The support is designed with a rest position against the sector cylinder, and a single drive simultaneously controls the transport rollers and the support displacement, eliminating the need for separate drives and reducing overall system complexity while maintaining stacking reliability
Solution Approach 2:
The single drive system is designed to perform multiple functions: it drives the transport rollers to feed sheets, displaces the support to create stacking space, and coordinates with the sector cylinder. This multi-functional design reduces the number of components while maintaining all necessary stacking operations
2Manufacturing precision
If multiple drives and control systems are implemented, then the stacking operation is precise, but the manufacturing cost and energy consumption increase
Solution Approach 1:
The patent merges multiple control systems into a single control architecture that manages the unified drive mechanism. This reduces manufacturing costs by eliminating duplicate control hardware and software while maintaining precise stacking through coordinated control of the transport rollers and support displacement
Solution Approach 2:
The support mechanism uses its own weight and the natural interaction with the sector cylinder to maintain positioning during stacking. The rest position against the sector cylinder provides automatic alignment and positioning, reducing the need for complex active control systems and sensors
3Use of energy by moving object
If the support is displaced by a pressurizing spindle for each sheet, then the energy consumption is reduced, but the device complexity increases due to the spindle mechanism
Solution Approach 1:
The pressurizing spindle operates in periodic cycles: it displaces the support by a predetermined amount for each sheet to be stacked, then returns to its initial position. This periodic action is synchronized with the sheet feeding process, creating space for each sheet only when needed, thereby reducing continuous energy consumption while managing the mechanism's complexity through rhythmic operation
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 simplifies the apparatus by eliminating the need for multiple drives and control systems, reducing manufacturing and operational costs while maintaining efficient sheet stacking without additional energy consumption.
Implementation Method 1
The glide rollers may be configured rotatably or in fixed manner on the glide shafts. Advantageously, the glide rollers are mounted rotatably on the fixed glide shafts. The surfaces of the glide rollers should be as smooth as possible. This condition minimizes the friction between the glide rollers and the individual sheets.
Data Source
AI summary
The invention relates to an individual-sheet stacking apparatus including a frame, a support which is displaceably guided at the frame and which is fitted with a rest surface for the individual sheet stack and having a pressurizing spindle to alternatingly shift and release the support. The pressurizing spindle consists of a pressurizing shaft rotatably supported at the frame, two pressurizing spindle lateral elements affixed to the pressurizing shaft, and at least two glide shafts configured in a fixed or rotatable manner at the pressurizing spindle lateral elements, the glide shafts being fitted with glide rollers. A drive means drives the pressurizing spindle into rotation.