Adjustable Stacker Shelves for Variable Height Cartons
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Solution Overview
Problem
Existing carton stacking apparatuses struggle to accommodate items of differing heights, leading to issues such as items catching or getting stuck when transitioning between stacking levels due to inadequate vertical spacing adjustment.
Innovation Solution
The apparatus features moveable stacker shelves along endless paths with switchable cam followers and tracks, allowing for adjustable spacing between shelves to accommodate items of varying heights by sliding between extended and retracted positions, facilitated by roller chains and servo motor control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vertical spacing between stacking shelves is increased to accommodate taller items, then items of greater heights can be stacked, but items may catch or get stuck in catch points when dropping down a level
Solution Approach 1:
The patent applies dynamics by making the shelf spacing adjustable rather than fixed. The spacing mechanism allows the vertical distance between shelves to be dynamically changed based on item height requirements. This resolves the contradiction by enabling the system to adapt spacing to accommodate taller items while maintaining appropriate spacing to prevent catching on catch points during the stacking operation
Solution Approach 2:
The patent changes the physical parameter of vertical spacing between shelves to resolve the contradiction. By adjusting this parameter according to item height, the system can accommodate different sized items without causing them to catch or stick during the stacking process
2Reliability
If the vertical spacing between stacking shelves is decreased to prevent items from catching, then items can transition smoothly between levels, but items of greater heights cannot be accommodated
Solution Approach 1:
The dynamic adjustment mechanism allows the system to switch between different spacing configurations. For tall items, spacing is increased to accommodate them; for smooth transitions, spacing is optimized to prevent catching. This dynamic capability resolves the contradiction between smooth transition and height accommodation
3Device complexity
If fixed shelf spacing is used to simplify the apparatus design, then the structure is simpler and more reliable, but it cannot accommodate items of varying heights
Solution Approach 1:
The patent introduces dynamic adjustability to the shelf spacing mechanism, allowing it to adapt to different item heights while maintaining a relatively simple overall structure. The spacing adjustment mechanism adds minimal complexity while significantly improving versatility
Solution Approach 2:
By making the spacing parameter adjustable rather than fixed, the patent enables the apparatus to accommodate varying item heights. This single parameter change provides high adaptability without requiring complete redesign of the apparatus structure
Data Source
AI summary
An apparatus for stacking items (I) includes first and second pluralities of stacker shelves (22) extending towards each other in spaced and parallel operative sections and each moving along first and second endless paths. The stacker shelves (22) are switchable by a switch (350) between extended and retracted positions. The stacker shelves (22) in retracted positions in the operative sections are operatively spaced from the item (I) received on the corresponding stacker shelves (22) in extended positions. In preferred aspects, the stacker shelves (22) are slideable relative to first and second plurality of carriers (310) carried along the first and second endless paths by roller chains (304). The switch (350) switches a cam follower (328) on each of the stacker shelves (22) into one of first and second cam tracks (342, 344) as the stacker shelves (22) enter the operative sections of the endless paths.