I was made to look into this by my wife - two child seats need to go on the rear bench this summer.

Most/all new cars have the Isofix type anchors:

http://en.wikipedia.org/wiki/Isofix

Volvo example:

http://accessories.volvocars.com/Acc...670-1/V50_2004

Example in a VW Bug 1600:

http://forum.1600i.de/viewtopic.php?f=4&t=159

In a Mercedes /8:

http://forum.mercedesclub.de/board1-...ng-im-8-coupe/

I just bought 2 pieces for a Skoda and Volvo with different heights to see if I can make it work. Maybe a steel brace mounted to the original lower seat belt holes.

More soon

 

I'm sure with a bit of engineering, something can be figured out inexpensively. Use a doubler on the underside of any structure you add to reinforce the sheet metal your attaching it to.

 

Shouldn't a brace of sufficient strength bolted to the lower seat belt holes on each side be enough?

Quick sketch:

 

I would think so, my suggestion was based on going through sheet metal only.

 

I already thought so.

Not going to drill new holes, go straight through the fuel tank diagonally and use the rear bumper bolts as anchor



I'm going KISS and if/when I find something I'll come up with a drawing.

 

@ Nop. I have had same idea along som others too. I believe I have those ISOfix brackets at work, will have to see tomorrow, and can then suply you with measurements if you want it. Maybe I can even suply you with a set, have to check my inventory tomorrow too. I have also found some seat belt buckles for AUDI A3 1. generation that I think could come in use if I decide to fit seat belts instead of ISOfix.
Only problem I see is the attathment point for the original lap belts is that the bottom of the reat seat will be in the way of the brackets.
Since we´re in the situation I´m sure we can come with a good solution.

 

The brackets themself are all different, because every car model has different seat cushions and angles/structures of sheet metal.

Thanks for your offer, but the first of my brackets is already shipped. I can only guess what ISOfix brace I need, so I'll have a try with 2 models.

The specs are clear, however:

Tab centers are 280mm apart, tabs are made of 6mm +/- 0.1mm round metal, 25mm wide:

http://www.unece.org/trans/doc/2008/...CRS-03-04e.pdf

The original lap belt attachment point is reused with the original belts, see my sketch above.

Ed:

After reading another time I think you mean that maybe there's not enough room behind the seat cushion. That depends on the form of the ISOfix bracket. I guess we'd need a quite flat bracket that has the tabs reaching out to the upper side a bit.

We'll see.

 

Just had a friend stop by this evening and we talt about the project. Though I think ISOfix would be a nice detail I will still be needing 2 sets og 3 pont harness in the rear due to my oldest son being 7 years old and aprox. 125cm in height. I can´t seem to find an ISOfix solution for kids his size and age. the youngest at 18 months no problem, even with lap belt only.
I´ll follow up on the brackets tomorrow and post it here. This weekend I will be in Wolfsburg and not online.
Cheers

 

That's group II/III, 15kg to 36kg, unless he had too much smørrebrød, I guess. Sorry, couldn't resist!

"Group III only" seats have bad test results, so I'd go with a "growing with the kid" Group II and III seat.

Example: Cybex "Solution X2-Fix" - Good test results, Danish Cybex page:

http://cybex-online.com/dk/carseats/solutionx2fix.html

 

'Smirbrot' as most Germans pronounce it, is very nice and delicious.

Isofix for this seat is only to hold the seat in place. You still need a seat belt as there are no integrated belt or harness in the seat.

 

#1 arrived:



Ford "4M51 613A08 AB"

Looks quite promising (Meaning not "That won't fit, for sure!"), will try this afternoon.

 

I have this ISOfix bracket AUDI part # 8E0813546A
Mounting holes on this is spaced a lot more narrow than the Ford part you have.
I´ll see if I can find the time tonight to get some measurements done in the car.
Good work Nop

 

I know these. Had an A4 8E company car for a few years.

Short summary so far:

Audi/Volkswagen part 8E0813546A (rear seat, passenger side)

Audi A4 (8E B6) Limousine/Avant 2001 - 2005
Audi A6 (4F C6) Limousine/Avant 2005 - 2011

Ford 4M51 613A08 AB (symmetric, rear seat, driver and passenger side)

Ford Focus (DA3) 2004 bis 2011

ed:

You can disable the capslock key in windows with a little software tweak, too.

 

All infants/childs car seats still include an option for installing with standard lap belts as well as the latch system.

Due to the design of the back seat in these cars- meaning they are not solid foam like modern vehicles, they are springs meant to compress- the factory lab belt tightened down enough to compress the rear seat is actually probably better than using the latch system- although less convienient since the belt button winds up in the middle of the seat back (i know i have my kids seat in the back of mine).
You may actually want to look into reinforcing the bottom of the rear seat where the child seat is going to go to make it a little more solid.

For the older kids requiring boosters, you'll need to install a rear 3point harness- which is a little more effort because you have to safely mount the rear retractor.

Morris belts sells these and they come with the special bracket that ties it to multiple panels in the back.

http://www.morrisclassicconcepts.com/chevelle67-73.html

I need to get a set of these for my oldest who's now in a booster too.

 

My Römer Brittax needs ISOfix (with or without top tether) or 3 point belts.

And as retrofitting three point belts is somewhat harder than a steel ISOfix bracket (especially in a convertible) I'll stay with the ISOfix mounting.

Modern ISOfix seats feature a front support leg to catch the forward tilt momentum on soft(er) seats.

PHAug0924082009556.jpg

Together wit ISOfix this is considered to be the most secure mounting.

 

Took a short walk to our metal worker during lunch break and gave him my drawing, revision #1.



He told me he'll slap together a bracket until next week.

The upper surface of this adaptor (where the ISOfix bracket mounts to) is almost touching the backrest and the seat cushion of the rear bench from the lower back/behind, so the two lugs from the bracket itself should end up peeking out of the seat a little. We'll see.

 

Interesting. Looking forward to your next update. I did some measures as well and in the process I decided to go in another direction.
I ordered a Fisher body Manuel on ebay . com, hope it can guide me to the location of the mounting points for the rear shoulder belt. If anyone has pictures of that please do not hesitate.

 

Any progress?

Not that I am rushing you, but summer is just around the bend.

 

Going to fetch the welded braces today.

There's a lot to do right now but I've been to the welder yesterday and they look good. I just wasn't able to take them with me as the boss wasn't there and he didn't write a price on them...

 

I believe that the shoulder belt mounts to the roof hinge bracket just behind the cover for the cylinder. Shows this on page 15-85 of the 1970 body manual. Can't find same illustration in the '72 manual. Don't have a '71 manual.

 

Those would be for the front shoulder belts. I am still anxious to see pictures of the rear shoulder belt in a Convertible.

 

So, here they are.

I hope I'll have the time to test-fit the braces today. They'll need some bending/reshaping, I guess, but I hope I don't have to unravel and re-weld them completely.



When they're OK the will be welded through.

 

Just found your thread....did your brackets work?

I am using 3 points in the front and two points in the back...we are using a maxi cosi goup 1 seat which is suitable for two points, but not longer available. And in future a group 0 which will be mounted in the front.

The only group 1 seat for 2 points available imo is the Britax Eclipse...maybe could be a solution for you?

Would love to discuss that at on one of the next snc!

Greetings from just 100km north

---
Andi

 

Hey there!

I'm still busy moving all my tools and cars to a new storage, still didn't manage to test them yet.

Will do next week, promised!

See you at the next SNC