EDSGN 100

Section 204

Design Project #1: Foldable Shopping Cart

Group 4

Submitted by: Meagan O’Hare; Shawnasty Bankovich; Michael Lydon; Shubam Kapadiya

Submitted to: Xinli Wu

July 25, 2013

Table of Contents

Abstract ………………………………………………………………….…Shawnasty Bankovich

Introduction…………………………………………………………………Shawnasty Bankovich

Description of Design Task:

Problem Statement………………………………………………….Shawnasty Bankovich

Mission Statement…………………………………………………..Shawnasty Bankovich

Design Specifications………………………………………………...……Meagan O’Hare

Design Approach:

Project management - Gantt chart……………………………….…………Michael Lydon

Customer needs assessment………………………………………….……Meagan O’Hare

Concept generation…………………………………………………………Michael Lydon

Design matrix……………………………………….…Shubam Kapadiya; Michael Lydon

Selection matrix………………………….………Shawnasty Bankovich; Meagan O’Hare

The Final Design and its Prototype:

A complete set of working drawings of your final design…………...…Shubam Kapadiya

Digital image of prototype/scale…..Shawnasty Bankovich; Shubam Kapadiya; Michael

Lydon; Meagan O’Hare

Design features………………………………………………………….…Meagan O’Hare

Operation instructions……………………………………………………..Meagan O’Hare

Engineering Analysis:

Working mechanism ……………………………………………..……….Meagan O’Hare

Cost analysis………………………………………………...………Shawnasty Bankovich

Summary and conclusions ……………………………………………….…Shawnasty Bankovich

Acknowledgement …………………………………………………….……Shawnasty Bankovich

References …………………………………………………...……………………Meagan O’Hare

Abstract

This project has enabled us to build upon our problem given and work through the

process of design as we would in a real situation. We created designs and weighed the different

sketches through a matrix. A not-to-scale prototype was produced of the selected design.

Introduction

This is the first of two projects in EDSGN 100 for the summer session 2 semester under

the direction of Dr. Xinli Wu. We were assigned to groups and given the task of constructing a

folding shopping cart with certain specifications.

Design Task

Problem Statement

Have you ever been in a situation where you were in need of a cart while you

were not in a store? Maybe you have lived in an apartment or an area where it is common

to use public transportation. A conventional cart is large and not compact for storage

purposes. A design is needed for a compactable cart.

Mission Statement

Our mission is to design and create a prototype for a cart that is capable of being

compacted. This design is to meet certain specifications along with being economical and

cost efficient.

Design Specifications

The folding shopping cart should be easy to use (and assemble, if required).

The folding shopping cart should be ideal for transporting groceries and some other

materials.

The folding shopping cart should fold compactly for easy storage.

The material cost for the folding shopping cart should not exceed $50 unless it can be

justified.

The folding shopping cart should have a weight capacity of 100 lbs

Design Approach

Gantt Chart

Table 1. (below) is a Gantt Chart showing our time and how it was spent.

Customer Needs Assessment

Customers need a foldable shopping cart which is affordable and versatile. The

original shopping carts are large and can hold many items, but the problem occurs when

the shopper needs to take the goods from the store. For instance, if the customer needs to

walk or take a bus, the initial shopping cart would have to remain at the store from which

it came. The innovative foldable shopping cart would put ease on the mobile shopper.

The foldable shopping cart would fold up into a backpack for simplicity and easy storage.

Design Specifications

The folding shopping cart should be easy to use (and assemble, if required).

The folding shopping cart should be ideal for transporting groceries and some other

materials.

The folding shopping cart should fold compactly for easy storage.

The material cost for the folding shopping cart should not exceed $50 unless it can be

justified.

The folding shopping cart should have a weight capacity of 100 lbs.

Design Matrix

Table 2. (below) shows our design matrix used in the developmental process.

A B C (Reference) D E F

Selection Criteria

Specifications of Class 0 0 0 + 0 0

Creativity/ Innovation - - 0 0 0 0

Working mechanism

and operation

instructions are clear 0 - 0 0 0 -

Ease of Operation 0 0 0 - - -

Safe to use 0 0 0 + + 0

Cost Efficient - - 0 - - -

Sum + 0 0 0 2 1 0

Sum - 2 3 0 2 2 3

Sum 0 4 3 6 2 3 3

Net Score -2 -3 0 0 -1 -3

Rank 3rd 4th 1st 1st 2nd 4th

Continue? No No Yes Yes No No

Selection

Matrix Selection Criteria

Weight

% Rating

Weighted

Score Rating

Weighted

Score

Specifications of Class 10 3 0.3 4 0.4

Creativity/ Innovation 5 3 0.15 3 0.15

Working mechanism

and operation

instructions are clear 20 3 0.6 3 0.6

Ease of Operation 10 3 0.3 2 0.2

Safe to use 40 3 1.2 4 1.6

Cost Efficient 15 3 0.45 2 0.3

Total Score

3

3.25

Rank

2nd

1st

Continue?

No

Develop

Table 3. (above) shows our Selection Matrix used in the selection process.

The Design and its Prototype

Working Drawings

FIG. 1. Design A

FIG. 2. Design B

FIG. 3. Design C

FIG. 4. Design D

FIG. 5. Design E

FIG. 6. Parts Design

FIG. 7. Canvas Bag

FIG. 8. Steel Rods

FIG. 9. Wheels

Engineering Analysis

Digital Pictures of Prototype and

its Scale

FIG.10. (right) Shows Meagan O’Hare with the

prototype on her back displaying its versatility as a

backpack with a 2:1 scale.

FIG. 11.

(left) shows

the prototype with the scale of 2:1

FIG. 12. (right) shows the skeletal strutting of the

prototype at a 2:1 scale

Design Features

Foldable Frame

4 Rubber Wheels

Canvas Bag

Can Use As Backpack

3’ Tall

Operation Instructions

To open shopping cart pull bottom down and snap handle bar into place. To close bag

and use as backpack, fold bottom towards back and snap into place; fold handle down

towards bag

Working Mechanism

The support structure of our shopping cart is made of hollow aluminum rods. There is a

base plate made up of cross-hatched aluminum and two attached support beams going up

the back, with 3 beams connecting the two in the middle. The strap material connects the

top corners of the back and the opposite corners of the base. The canvas bag itself is

nailed to the back for stability.

Cost Analysis Table 3. (below) shows our expenditures.

Cost Assessment

Product Description Product Number Price $ Quantity Subtotal $

Wheels 22575T18 3.59 4 14.36

Canvas 8777K13 2.89 4 11.56

Aluminum 9008K17 4.67 2 9.34

Strap Material 8778K1 1.31 1 1.31

Strength Thread 2057T76 8.55 1 8.55

Total

45.12

Summary

The four of us worked together to complete the goal of designing and constructing a

prototype based on the design statement, “Design and build a prototype of a folding

shopping cart for people without cars, or people that need to carry groceries longer than

from garage.” We worked through the design process together and reached out goal.

Conclusion

We would like to thank Dr. Xinli Wu and our TAs Nick and Yoon for their assistance and

patience. This project was very helpful and descriptive in the sense that it exposed us to

the design process that we may use in the future.

References

"McMaster-Carr." McMaster-Carr. N.p., n.d. Web. 24 July 2013.