HS-DT-S1-Clement

=Design Folder - Clement Burgeon=

Unit question interpreted:
Chairs are some of the most used objects in modern world, essential in many things of life such as in school for students and teachers to sit. So knowing this and knowing that the DT lab is overflowing with cardboard, how could we re-use wisely this cardboard without throwing it to make confortable chairs supporting a 150 lbs. person without any fasteners?

Design Brief:
Sitting is the main activity of normal students during the year, each day. And in most of the countries students sit on chairs. Knowing that the DT lab is overflowing with cardboard, I will make a cardboard chair which is comfortable and when people see it they want to sit in it.

Design Specification:
1) Should only be mad of cardboard 2) Should support a 150 lbs peson 3) Should be confortable 4) Should be made of a maximum amount of cardboard 5) Should be safe 6) Should not be too difficult to make

__I could test my product by:__

1) Sitting on it. 2) Sitting on it adding weight. 3) Sitting on it with different positions.

First try:


What I constructed there is a bench with back support for each side, I mostly used cutting to assemble pieces together but I didn't really thought of what to do to make it hold a big weight.

Second try:


Listening to the advices gave by Mister Muller I decided to create a small triangle with only 1 cut to assemble it. After that I added a basic back support but after that it couldn't hold the tape anymore because its weight wasn't balanced anymore.

Third try:

On my third try, I designed a triangle as a base, which was pretty strong thanks to another intern triangle. But unfortunettelly i still didn't come up with a good back support design.

Conclusion:
After these 3 tries,a bit of thinking and research I understood that a good design capable of holding a heavy weight for a long time would be a design made of several triangles of different size, one in the other to make a solide structure, with just the necessary of cutting to create a minimum of weakness points.

21/09/2011

Guiding questions with answer:

What size is a chair? What is the size of a normal chair? What is a confortable chair? How do people sit? What is the height of an average person?

A comfortable chair for a living room is a chair is a chair that attracts people to sit on it, enjoy their sitting but without being disturb too much of it's comfortability so that a professional dinner can still be taken. A normal heigh for that kind of chair is 45 cm with a back support of about 55 cm. Before don't really lean on the back support of these kind of chairs, so it is still needed but more as a sort of decoration.

18/10/11

QUARTER SCALE MODEL
== At the begining when I started my quarter scale, I thought everything was going to go like I was planning. But I had some problems everything was just like I expected for the part where you sit, appart for the part holding my triangle together... The folds were to thin and after a few time broke. ==

Then for my back support I had another problem, which was that it wasn't strong enough to hold weight and was going to collapse. So I had to add an inside piece wich could hold weight. Then my other problem for the back support was that I couldn't close it the way I wanted because my drawing were wrong, so because of that my chair went for a normal chair to a rocking chair. For my full scale if I have to redraw things I will try it on small pieces of paper before applying it on my full scale model.

Appart from these little problems and things I will have to change on my full scale project, I think I came up with a good design, and I also think it will meet all the points required by the design specification (capable of holding a 150 lbs person, no glue, no tape, etc).

31/10/11

After a long moment of reflection on how to make my back support strong as I imagined it, I understood that my idea was impossible because of the locking impossible at the sitting level. So i decided to give up completely on this design and to start on a fresh and new base, I designed my chair concept in 3D but also how it would look like if it was flat with all the measure using google sketch up.



14/11/11

Looking for my card board to design my chair I understood that the card board will never be big enough to do all at once, so I divided my chair in 2 main pieces for the back support and the seat, and also 3 other card board that I put inside my design to hold the back support with the seat. The dimensions for my 2 main cardboard pieces were: 1 meter by 1.60 meter for my seat and 1 meter by 95 cm for the back support. After finishing my chair completely and presenting it for the first time to the class Mr. Muller and students help me find problems that could be change on my chair, these problems were three: - The seat wasn't completely in the middle and was too small compared to the back support. - The inner pieces weren't parallel to each other. - The inside of my seat was visible because I forgot to close one side.

So to solve these problems I did a new seat part with one more side and I did the seat wider so that it had the same width than the back support, to solve my last problem I did my slots bigger so that less pressure was put on them, the results were that my inner pieces were parallel, my seat had the same width than the back support and it was correctly placed in the middle of my back support.