DIGITAL DESIGN + FABRICATION SM1, 2016 M1 JOURNAL – Folding Umbrella Cheng Chi Yau 723265
Michelle James, Group No.1
Measured Drawings
ELEVATION
PERSPECTIVE (TOP VIEW)
PLAN
SECTION
First, I took the photos of top view, elevations and bottom view of the folding umbrella when it is closed and opened. Then, I measured the dimensions of the real object with measuring tape and marked the dimension on my sketches. Lastly, I finished the measured drawings with accurate measurement.
Elevation when fully closed.
Top view when half opened.
Bottom view when fully opened with measuring tape.
As the sizes of the umbrella varies a lot when it is fully opened and closed, I drew the plan (1:5), elevation (1:5) and perspectives (1:1 and 1:2) in different scales in order to show all the details of it.
Analysis
The photo shows the umbrella when fully closed (RED part of the diagram).
The photo shows the umbrella when half opened (BLUE part of the diagram).
Mechanism of the umbrella The above digram shows how one of the ribs and stretchers works when the umbrella is closed (red), half opened (blue), and fully opened (black). The other 5 pairs of ribs and stretchers have identical properties.
The photo shows the umbrella when fully opened (BLACK part of the diagram).
1. When the object is closed, the ribs and stretcher tend to form a “M� shape; all the ribs and stretcher nearly stay vertically. 2. When the runner is pushed up, the stretcher will push the rib perpendicular to it in its mid point; while the second rib in the middle will also be pushed by the stretcher at its end point. The whole rib expands away from the shaft. 3. When the runner is pushed up to the top notch, stretcher will push the ribs and the first two ribs form a straight line, the last rib expand to its maximum angle (25 degrees).
Digital Model
PERSPECTIVE
ELEVATION
PLAN
ISOMETRIC
DETAILS (runner of the umbrella – side view)
Modelling Method: 1. model the handle, shaft and runner with the button on plan. 2. model one rib and stretcher on the plan; projected it to the top of the shaft and bended into required angles. 3. rotate and copy the bended rib and stretcher with 60 degrees using the top of the shaft as centre. 4. create one slice of the canopy on the plan; projected it to the top of the shaft and bended along the ribs. 5. rotate and copy the canopy with 60 degrees with the top of shaft as centre.
Sketch Model
PERSPECTIVE
PERSPECTIVE
ELEVATION (Front view) This design is inspired by the mechanism of folding umbrella. The vertical shafts in the grids (bone) can be shortened like the shaft of umbrella. The ribs of the pyramids form continuous W – shapes and can be compressed vertically like the ribs of umbrella. Drawing paper and tracing paper are used to cover parts of the pyramids to form the skin of the model. Volume is created within the pyramids; it varies with the height of pyramids.
PLAN and DETAILS - Compressing process
1. Make the main frame with bamboo skewers and wrapped up with paper.
4. Each pyramid varies in height increase gradually from bottom left to top right.
2. Roll two identical sticks and fold in the middle. Intersect the two sticks at mid point to form a pyramid .
5. Use paper and tracing paper to cover the pyramids.
3. Repeat the previous process for each grid and stick them on the frame.
6. Transparency increase along with the height of pyramids. The variation changes from drawing paper, tracing paper to none.
Sketch Design #1
DEFENSIVE, EXPANDABLE, CHANGABLE, HIDING
The ribs can be shortened and rotated around the top cycle using the umbrella's system when the user is not using it.
This design is inspired by durian. The main frame expanded from the top circle; each shaft are bended according the head shape and they can be shortened when not in use. In between the shaft, ribs in pyramids form the pointy angles. The main frame of the model are metals which support the pyramids on it; while black plastic sheet is used as the skin on the ribs so that others will not see the face of the user.
This diagram shows how the bone structure works under the skin and how they compress.
How does this respond to your personal space? This design are used to defense others' interruption. The pointy pyramids warn others not to disturb the user in sleep; while personal space is created around the head by the pyramids.
Sketch Design #2
INFLATABLE, SOFT, PROTECTIVE, CUSHION-LIKE, TRANSPARENT
Each set of canopies composes of one large canopy and four small canopies which are perpendicular to each other. The small ones add strength to prevent strong movement. FRONT
This design is inspired by jellyfish and the canopy of the umbrella. The inflatable canopies surrounding two sides, the front and the back of the user to form a protective cover. They also act like cushions which create a comfortable sleeping pod. The whole sleeping pod is made by transparent plastic which are inflatable. The canopies cover the whole upper part of the body except the face to allow breathing.
BACK
The red lines show how the canopies arranged around the body, the canopies are denser at the back of the head to prevent from hitting surrounding objects while sleeping.
How does this respond to your personal space? The design protect the user from hitting other objects while sleeping. The surrounding inflatable canopies create volume around the user and increase the privacy.
Sketch Design #3
PROTECTIVE, BARRIER, WEB
This design is inspired by shell and the ribs of umbrella. The main frame expanded from the front pivot point and join the main supporter at the back. Shafts are bended into shell shape surrounding the head. In between the ribs, there are webs as the skin of the sleeping pod. The ribs are placed on the supporter which sits on the shoulders.
The main frame of the model are metals and the skin is composed by metal wire. The wired web increase privacy of the user when sleeping as others will be hard to look through the web.
How does this respond to your personal space? The model acts as a barrier from the outside world, user can hide in the large shell and stay away from others.
Appendix Rhino Exercise Screen Capture