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Furniture #25: GN Prototype chair Making the seat and assemblying most parts

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Blog entry by robscastle posted 04-23-2017 11:35 AM 1079 reads 0 times favorited 9 comments Add to Favorites Watch
« Part 24: GN Prototype Chair (or Pottz made me do it) Part 25 of Furniture series Part 26: GN Prototype chair redesign and final assembly »

I continued after lunch and made the seat cut out the joints and dry assembled everything.

Construction process

I used a contractors saw with a miter sled rip fence and my tenoning jig to cut all the timbers

To make the seat I cut up some pallet frames, cut a taper on the underside to 30mm and glued them all together.

The overall thickness at the back was not 50mm so I added a section to achieve the 50mm thickness.

I cut the seat joints on the saw and fine tuned the fit with a Rasp.

I then marked out the top post tenons and cut them, again using the table saw and tenoning jig.

Here is a few shots of the joints.

That was enough for the day so work stopped at this stage.

-- Regards Robert



9 comments so far

View Joe Lyddon's profile

Joe Lyddon

9892 posts in 3808 days


#1 posted 04-23-2017 05:02 PM

Just a thought…

Could you leave the final pieces of the sides OFF the seat, with just the notches cut in the seat…
Place an outside SIDES, also notched, into leg and glued & clamped to seat…
... auto Perfect Fit??
... why cut & fit it??

This is interesting…

Could it handle the weight of 210 lbs+??

COOL… Thank you…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View pottz's profile

pottz

1871 posts in 740 days


#2 posted 04-23-2017 05:41 PM

these conoid chairs are one of my bucket wood list projects.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View robscastle's profile

robscastle

4219 posts in 1960 days


#3 posted 04-23-2017 08:07 PM

Joe: Here is an image of the actuall Coniod seat frame joint.

There is no reason why the joint could not be formed as you described. I would certainly speed construction thats for sure.

As for the loading I tink although pine may not be strong enough in the long term it would hold 219 Lbs or about 100 Kgs OK, once I finish it I may load it up to check.

With no known plans available for the chair, trying to determine construction details is I guess a matter for the builder. If you check mine its not as per the original design as the back is flush with the support rails.
Something I will have to change upon final build, along with the height of the actual seat from the floor as identified by Crowie.

Its on hold for a while while I go earn some money to pay bills!

I might see if I can contact Mira Nakashima and seek some research help, but she is possibly already defelecting all sorts of enquiries like mine.

-- Regards Robert

View crowie's profile

crowie

1933 posts in 1707 days


#4 posted 04-23-2017 09:35 PM

I can very much appreciate your skills with the joinery Rob….well done sir…

Apologies for the extra work, it’s just that my 4’11.5” wife often makes comment about seating heights….

-- Lifes good, Enjoy each new day...... Cheers from "On Top DownUnder" Crowie

View pottz's profile

pottz

1871 posts in 740 days


#5 posted 04-23-2017 11:55 PM

I hear ya crowie,mines 4’10.5”,this chair would be a leg dangler for sure-lol.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View Joe Lyddon's profile

Joe Lyddon

9892 posts in 3808 days


#6 posted 04-24-2017 05:14 PM

Rob,

Thank you!

That extra little space to make the seat flush to the backside of the legs might result in a lot of Strength gained; making it weaker as it is now shorthened…

COOL Chair… You have me Thinking… I think I would try it with White Oak… or Maple…

Sure looks COOL…

Thanks again…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View Joe Lyddon's profile

Joe Lyddon

9892 posts in 3808 days


#7 posted 04-24-2017 05:43 PM

I just did a Search for Mira Nakashima

They sell for approx. $11,000 EACH!!
... to me, That is a little much… sorry to say…

Rob, you’re on a very good Track! :)

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View Joe Lyddon's profile

Joe Lyddon

9892 posts in 3808 days


#8 posted 04-24-2017 05:54 PM

Looks like the seat has a Screw going from the Back of each Leg into the seat and is plugged... Look at the pictures 4 & 9… Back View…

This would strengthen it substantially…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View robscastle's profile

robscastle

4219 posts in 1960 days


#9 posted 04-25-2017 07:34 AM

Thanks Joe:

I had a look at the pictures, your correct, pity I didnt find them last week!! Oh well.
Looks like I will be doing a bit more work to get them into the best possible reproduction.
I also took a look at your website and specifically your router skis, ...something I have been pondering for quite some time

Thanks for the links.

-- Regards Robert

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