Senior Design Review Andrew Beasten Greg Feather Alex Phillips Brendan Moran Wegman’s Bread Tray...
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Transcript of Senior Design Review Andrew Beasten Greg Feather Alex Phillips Brendan Moran Wegman’s Bread Tray...
Senior Design Review
Andrew BeastenGreg FeatherAlex PhillipsBrendan Moran
Wegman’s Bread Tray Lift Assist
Wegman’s Bread Tray Lift Assist
• Goal:Improve ergonomics for operator during the task of stacking loaded bread trays at the Wegman’s Bakery.
Critical Needs
• Enable good ergonomic practices in terms of lifting and body position
• Meet Wegman’s safety requirements in terms of mechanical operation and physical aspects (sharp edges, pinch points).
• Meet Wegman’s requirements in terms of cleaning and food contamination risks
• Ease of use for operator• The unit should be durable and reliable
Specifications
• Minimize step time• Mechanical components are constructed from
food safe material• Allow for food to descend no closer to the
floor then ½ inch
Hold first and subsequent traysuntil dolly touchesfloor
Lower Trays
Hold Trays
Reset Lift
Release from system
Constant force mechanism
Keep relatively horizontal
Mechanical reset
Continuous reset
Dolly slides off
Tray Slides onto dolly
Eliminate need to bend over
Lower each tray from waist level
Maintain waist level loading
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
Why Not Electric• Skill set– Programming and Controls
• Safely– Eye wash station for battery– Cords are tripping hazard
• Maintenance• Source of power• Less versatile • More complex
Pugh Matrix Results For System
• Criteria Considered:-ease of use, resetability, durability, portability, cost, safety, storage, maintenance, simplicity, and input required
• Ranking system: 1-3
Pugh Matrix Results Reset Mechanism
• Criteria Considered:-Cost, feasibility, practicality, maintenance, safety, simplicity, endurance and adaptability
Proposed Design• Skeleton Frame• Sheet metal wrap
• Springs and Damper• Track guided system• Lockable wheels• Lock at bottom
position
Variation in Design
• Side guard material• Overall material• Foot pedal Release• Fork vs. Plat form
Questions and Comments