Payload Attachment Payload Attachment ConceptsConcepts

OverviewOverview

• Securing the payload is important for Securing the payload is important for safety and appearance.safety and appearance.

• The payload should not come off the The payload should not come off the platform during platform operation.platform during platform operation.

• The platform should look organized The platform should look organized when the attachment device is not in when the attachment device is not in use.use.

Needs AddressedNeeds Addressed

SAFETY (1)SAFETY (1) Perform required tasks (3)Perform required tasks (3) Economical (5)Economical (5) Robust (6)Robust (6) Appealing (8)Appealing (8) Easy to manufacture (11)Easy to manufacture (11)

IssuesIssues

The securing devices must be easily The securing devices must be easily concealed in the platform.concealed in the platform.

They must therefore be light and They must therefore be light and small to not overload the platform.small to not overload the platform.

It is desirable to have the mounting It is desirable to have the mounting holes be multi-functional for multiple holes be multi-functional for multiple mounting devices.mounting devices.

CONCEPTSCONCEPTS

Tee nutsTee nuts• These can be secured by a These can be secured by a

bolt to a slot, meaning bolt to a slot, meaning they can be moved to any they can be moved to any location along the slot.location along the slot.

Toggle clampsToggle clamps• These are a quick and These are a quick and

simple way to tightly simple way to tightly secure the payload; just secure the payload; just turn a lever.turn a lever.

ConceptsConcepts

Tie-Down StrapsTie-Down Straps• These are lightweight and These are lightweight and

easy to use and storeeasy to use and store Bungee holes around Bungee holes around

edgeedge• Bungee cords are easy to Bungee cords are easy to

use, and mounting them use, and mounting them in specific holes would add in specific holes would add strengthstrength

ConceptsConcepts

Platform materials with Platform materials with holesholes• More holes than the previous More holes than the previous

idea, easier because idea, easier because purchased with holespurchased with holes

Platform materials with Platform materials with threaded holesthreaded holes• Advantageous to a simple grid Advantageous to a simple grid

because anchors could be because anchors could be applied to the holesapplied to the holes

CONCEPTSCONCEPTS

Drop-Down GatesDrop-Down Gates• Gates would be easily Gates would be easily

storable, and would storable, and would fence the whole fence the whole platformplatform

Side FlapsSide Flaps• Flaps would easily Flaps would easily

expand the surface expand the surface area of the platform, area of the platform, and be easily storableand be easily storable

Preliminary AnalysisPreliminary Analysis

Tee nutsTee nuts• ProsPros

VersatileVersatile Looks impressiveLooks impressive

• ConsCons Difficult to Difficult to

manufacturemanufacture Not economicalNot economical

Toggle clampsToggle clamps• ProsPros

Easy to assembleEasy to assemble Looks impressiveLooks impressive

• ConsCons Difficult to Difficult to

manufacturemanufacture ExpensiveExpensive

Preliminary AnalysisPreliminary Analysis

Tie-Down StrapsTie-Down Straps• ProsPros

No assemblyNo assembly Clean in Clean in

appearanceappearance

• ConsCons Not as strong as Not as strong as

some methodssome methods ExpensiveExpensive

Bungee holes Bungee holes around edgearound edge• ProsPros

Easy to useEasy to use EconomicalEconomical

• ConsCons Not a strong hold Not a strong hold

on payloadon payload Difficult to Difficult to

manufacturemanufacture

Preliminary AnalysisPreliminary Analysis

Drilled holes Drilled holes (grid)(grid)• ProsPros

No assemblyNo assembly Economical Economical

• ConsCons Not impressive Not impressive

in appearancein appearance Not a strong Not a strong

hold on payloadhold on payload

Drilled and Drilled and tapped holestapped holes• ProsPros

Added visual Added visual appealappeal

More secure hold More secure hold on payloadon payload

• ConsCons Not easy to useNot easy to use Not durableNot durable

Preliminary AnalysisPreliminary Analysis

Drop-Down Drop-Down GatesGates• ProsPros

Impressive in Impressive in appearance appearance

• ConsCons Not easy to Not easy to

manufacturemanufacture Not lightNot light

Side FlapsSide Flaps• ProsPros

Impressive in Impressive in appearanceappearance

• ConsCons Not robustNot robust Not much Not much

restraining force restraining force on loadon load

Final conceptFinal concept

Create a Drilled and Tapped GridCreate a Drilled and Tapped GridThrough Pugh charts, we deduced that these two options met more of our Through Pugh charts, we deduced that these two options met more of our

criteria with a higher score than any others. The grid without threads was criteria with a higher score than any others. The grid without threads was versatile in anchoring the load, and the threads added to our payload-versatile in anchoring the load, and the threads added to our payload-securing options.securing options.

We looked for bungee cords for this design, and found two options on MSC We looked for bungee cords for this design, and found two options on MSC Direct. One was essentially four cords bundled in the middle (hooks are Direct. One was essentially four cords bundled in the middle (hooks are made of fiberglass and nylon), costing $14.65 per cord, and the other was made of fiberglass and nylon), costing $14.65 per cord, and the other was a rubber bungee cord, 5/16 inches wide with metal S-hooks, costing $4.01 a rubber bungee cord, 5/16 inches wide with metal S-hooks, costing $4.01 per cord.per cord.