Date Tags fll

I’ve been a FIRST LEGO League volunteer since 2000, a robot game referee since 2007, and a head referee since 2017. I’ve had a growing interest in expanding the number of teams in our region, and needed a way to bring robot game demonstrations to potential teams. Since a standard robot game table is 48”x96” and I have both limited space in my vehicles and no trailer, a more portable robot game table was required.

Literature Review

One useful list of more portable robot game tables is found at FLL Tutorials’ “Building an FLL Table”. As of 2020-03-15, their publicly available set of designs includes:

I went with Lance’s design, since it only required a circular saw and screws, all the parts were available at my local Lowe’s, and it fits in the back of my Honda Fit.

The only place I deviated from Lance’s plans was that I didn’t use the steel hasps to keep the sections of the table rigid when flattened out. So far, I’ve only placed the game table on other tables, and not sawhorses, so it hasn’t been an issue.

Solid Model Screenshots

Rolling configuration:

Figure 1: Trifold table in rolling configuration

Flat, folded configuration:

Figure 2: Trifold table in flat, folded configuration


Figure 3: Trifold table unfolding


Figure 4: Trifold table unfolded

Build Photos

The return trip from Lowe’s—I had them cut the 48”x96” plywood and three of the 96” 2x4s into three equal pieces, and cut the last 96” 2x4 in half:

Return trip from Lowe's

After priming:

After priming

Test assembly without fasteners to find the arrangement that has the tightest fit between sections:

Test assembly without fasteners to find arrangement with tightest fit

Clamping and attaching sides to table surface with drywall screws:

Clamping and attaching walls

Checking the top hinge assembly:

Checking top hinge assembly

Testing for fit:

Testing for fit

Not great results. Would like to close up these gaps as much as possible:

Too much gap at joint 1

Too much gap at joint 2

On both joints, the side walls stick out just slightly beyond the plywood base:

Excess side wall length at joint 1

Excess side wall length at joint 2

Marking and removing the excess on the side walls:

Marking excess side walls

Removed excess side walls

Testing for fit again, much better this time:

Much better fit

Finishing the top hinge assembly:

Finishing top hinge assembly

Testing the first fold:

Testing first fold

First fold, end view

First fold, detail view

Flipping the table over, attaching the bottom hinge assembly, and testing the second fold:

Flipped table for bottom hinge assembly

Testing second fold

Attaching first locking hasp:

Attaching first locking hasp

First hasp locked

Table upright, ready for second hasp

Attaching second locking hasp, I should have gotten larger ones with at least 1.5” of gap between the mounting plates:

Attaching second locking hasp, should have gotten larger one

Game table sections all locked up:

Both hasps locked

Attaching casters to outer sets of dummy walls:

Attaching casters to dummy walls

Attaching all dummy walls:

Attaching dummy walls

Assembled except for handles, side view:

Waiting for handle assembly, side view

Top view:

Waiting for handle assembly, top view

Handles attached:

Handes attached

Travel Photos

Going into the Fit:

Placed behind Fit

Tilted into Fit

In the Fit with back seats down:

Inside Fit

Lots of room for tools and other supplies:

Inside Fit with other tools and supplies

In referee practice room, before setup:

In referee practice room, before setup