Finn forsyth module 1 final

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DIGITAL DESIGN + FABRICATION SM1, 2016 M1 JOURNAL - Umbrella

Finn Forsyth 762228

Michelle + Tutorial 5

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Measured Drawings

990mm

Figure 1.

Figure 1 depicts the bottom view of the umbrella when it is fully extended. The umbrella spans 990mm tip to tip of the arms.

In this view the mechanical arms that enable the umbrella to collapse to such a small size cannot be seen. refer to Analysis (page 3) to observe this mecha-nisim.

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990mm

Methodology

The process of creating measured drawings was done utilizing a number of different methods. the first was through photography, the seciond was measuring with a ruler and calipers, and the third was with the aid of a photocopier. Figure 3 is an amalgamation of the different stages of an arm of the umbrella. As it extends and retracts. Each section of the arm was measured with a ruler to give an accurate scale drawing.

Figure 2 depicts the front, top and bottom views of the umbrella while it is fully retracted and secure. In order to maitain the correct scale the umbrella was scanned and then traced.

Figure 2

2cm 4cm 24 cm

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Analysis

The extension and retraction of the umbrella was a process that was both intriging and seemly intricate. However once detailed mea-surements and sketchs of each moving component was undertaken the, simplicity of the system was exposed.

Each of the eight identical arms of the umbrella is composed of six members, one of which is simply a wire. The three sketchs overlayed on one and other, displays the movement of the hinges as well as positions of each member whilst the umbrella is being deployed or retracted

Figure 3

450mm

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Figure 4 shows a section of the umbrella cut down the length, while fully retracted. The shaft is composed of three tubes of varying diameters which telescope out and lock when fully extended by the aid of two small ballbearings (Figure 5).

Figure 5. The locking mechanism for the telescoping shaft is accomplish through a spring and two small ball bearings. the sprinf inside the inner shaft pushes the ball bearings out through two small holes, When the umbrella is being extended the ball bearings run along the inside of the outer tube until they meet two holes on the outside tube. Once here the springs push the ball bearings into these holes, which are de-signed to be too small for the bearings to fit through, thus locking the two shafts inplace.

Figure 4

Figure 5.

As the tube moves iunto place the ball bearings

pop into the outer tube

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Digital Model

Wireframe

Top

Front

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The umbrella is composed of two main components the frame and the plastic waterproof sheeting. The metal frame supplies the ridgidity and support for the plastic materila which protects one from rain. When modelling the umbrella in Rhino 3D, it seemed logical to begin with the frame and add the waterproof material at the end.

Each arm of the umbrella is composed of the same simple form cop-ied and rotated about a central axis (this axis being the main shaft). Thus utilizing the Rotate 3D command on a single arm drawn with polyline and simulataneously copying I was able to create the entire frame.

The handle was created by drawing a cylinder andfilleting the edges.

the material cover over the frame was modeled with the ‘surface from 3 or 4 points’ command.

Finally using the ‘Pipe’ command the frame was made three dimen-sional

Perspective 3D render

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Sketch Model #1

Working with a material system that involves both rigid and flexible com-ponents provided a great springboard for sketch modelling. Using balsa wood I created an uneven geometric almalgamation of shapes, which i subsequently spanned with small sections of reused waterproof umbrella material. In this model I experimented with blended lines and planes. Instead of having a rigid corner with the balsawood, I instead created a corner with the flexible umbrella material.

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After completeing the first model, i decided to experiment with hinges and moving parts in conjunction with the skin and bone theme. for this i took inspiration largely from the umbrella. While the bones of the model move about an axis, thus locking them in to one single movement, the material connecting each ridged part of the frame is free to move and distort, allowing for the surface to be always dynamic and changing.In addition, varying the material from repurposed umbrella skin to a single string al-tered the form in a big way. In a way the string became flexible bone of the structure.

Sketch Model #2

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How does this respond to the brief?

Sketch Design #1

The hood first telescopes up and out of

the back pack (similar to the umbrella)

and then folds down over the wearers

face.

Portable, private, telescoping hood

A sleeping pod that can be used anywhere on campus. This design enables one to sit anywhere and simply lower the hood over their face to hide others from view and create a level of light more comfortable to sleep in as well as blocking out distractions.

Once fully extended the hood can be tipped forward and positioned to allow for those who prefer sleep-

ing at the desk with their head on the table (below).

The backpack is slim enough to allow it to be worn whilst sitting in a chair and remaining comfortable.

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The design can be fitted to any weight bearing beam around campus. It allows for the multi use of space as it can be entirely lifted out of the way. In addition it can create a room like space that provides a com-fortable environment to rest in

How does this respond to the brief?

Sketch Design #2 retractable, inversed umbrella,

Tthe retractable room resembles the mechanical movement of the umbrella. When lowered the mate-

rial that spans each of the arms is loose in between each arm, creating a surface that undulates and

catches the eye on the outside, while also creating a soft feel on the interior.

Fully retracted

fully lowered Gap left at the bottom to allow

for sufficient airflow. air holes

could be placed at the top

aswell

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Sketch Design #3

How does this respond to the brief?

Collapsable, Cantilevered, mechanical

Similar to the umbrella, as the bed extends the fabric that spanes the structure, gradually becomes more taught. thus when fully extended it is able comfortable hold a person while still conforming to the contours of the body

As the bed folds out, a cover over the top extendeds simultaneously, thus

providing protection from public eyes.

The collapsable bed is compact and unobtrusive when not being used as it can simpley be folded up against the wall. To the occupant it pro-vides not only a comfortable place to rest but also provides protection from wandering eyes, thus providing a sense of security which may in turn improve the quality of sleep.

Red arrows follows direction of movement of the bed as it

retracts and extends

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Appendix