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Wegmans Bread Tray Lift Assist. Senior Design Review Andrew Beasten Greg Feather Alex Phillips Brendan Moran. Wegmans Bread Tray Lift Assist. Goal: Improve ergonomics for operator during the task of stacking loaded bread trays at the Wegmans Bakery . Critical Needs. - PowerPoint PPT Presentation
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Senior Design Review
Andrew BeastenGreg FeatherAlex PhillipsBrendan Moran
Wegmans Bread Tray Lift Assist
Wegmans Bread Tray Lift Assist
• Goal:Improve ergonomics for operator during the task of stacking loaded bread trays at the Wegmans Bakery
Critical Needs• Enable good ergonomic practices in terms of
lifting and body position• Meet Wegmans safety requirements in terms of
mechanical operation and physical aspects (sharp edges, pinch points)
• Meet Wegmans requirements in terms of cleaning and food contamination risks
• Ease of use for operator• The unit should be durable and reliable
Specifications
• Minimize process time• Mechanical components are constructed from
food safe material• Allow for food to descend no closer to the
floor than ½ foot
Hold first and subsequent traysuntil dolly touchesfloor
Hold Trays
Reset Lift
Release from system
Constant force mechanism
Keep relatively horizontal
Mechanical reset
Continuous reset
Dolly slides off
Tray Slides onto dolly
Maintain loading at waist height
Lower each tray from waist level
Ramping mechanism
Keep dolly with trays
Functional Decomposition
Holding Trays
Lifting Trays
Remove from System
Reset Lifter
Position Tray
Collapse
Forks ClipsMagnet Flat base Hooks
Spring Weight Piston Rack Pinion Pulley Motor
Fall Push/Pull Lift Magnet
Pedal Switch Lever Button Pull Cord
Walls Guide Rail Slots/Grooves Rubber Stopper
Hinge Cotter Pin Screw Tab
wedge Magnet
Magnet
Manually
clips
Pugh Matrix Results For Lifting Trays
• Criteria Considered:Ease of use, resetability, durability, portability, cost, safety, storage, maintenance, simplicity, and input required
• Ranking system: 1-3
Pugh Matrix Results For Reset Mechanism
• Criteria Considered:Cost, feasibility, practicality, maintenance, safety, simplicity, endurance and adaptability
Why Not Electric• Skill set– Programming and Controls
• Safety– Eye wash station for battery– Cords are tripping hazard
• Maintenance• Source of power/Tethered • Less versatile • More complex
Proposed Design• Skeleton Frame• Sheet metal wrap
• Springs and Damper• Track guided system• Lockable wheels• Lock at bottom
position• Lever vs. foot pedal
Variation in Design • Side guard material• Overall material• Foot pedal release• Fork vs. plat form• Wall vs. leg support
Risks Design Risks:• Spring failure• Metal bending• Pinch points• Sharp edges• Fast movement/impact
risk• Trip hazards
• Design failure/product does not work
• Visibility• Incorrect guarding• Tipping/fall danger• Lubrication concerns• Metal shavings• Ergonomic failures• Unstable product
Project Plan
Questions and Comments
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