To enjoy her little girl at mealtime and create a unique object, Patrick Monnet made a wooden high chair, which can fit under a table like a classic chair.
Cost: 40 € approximately
Time: 3 days
Equipment: table saws, hand saw, jigsaw and radial saws, ripper, screwdriver, meter, square, bent square, clamp, engraving cutter, sander
The high chair made by our reader measures 60 cm at seat height and its footprint is 50 x 50 cm, which ensures a good stability. The armrests are neglected by the use of small armrests in the quarter-wings, which allow the seat to be stored under the table. The safety of the child is ensured by a belt on which is engraved his name, also painted on the file. Angle cuts are made using a radial saw or miter saw. The angles required here are to be traced with a protractor and a false square.
Draw a diagram for the base
In order to be able to check the dimensions and the angle measurements on each side, our reader has made a scale diagram 1 on a particle board where the pieces are deposited as and when the cuts. The seat, backrest and armrests are cut from a 20 mm thick pine board. The various elements are assembled flat-sided and fixed by gluing and screwing (screws Ø 6 mm). In order to conceal the screw heads, it is necessary to drill half-round to Ø 8 mm. The holes are then obscured by 8 mm trunnions, leveled with a saw.
Pattern and engraving: to treat
To cut the pattern drawn on the back, a hole is drilled in the center of the drawing, so as to engage the blade of the jigsaw and perform cutting from the inside. The carving songs are then softened with sandpaper. The engraving is performed with a bur to be engraved mounted on a small router. For a clean work, the name of the child is drawn carefully on a layer and reported on the folder.
Cutting of crosspieces and front legs of 30 x 40 mm section is performed using a table saw. Their end is cut with a radial saw with a cutting angle of 7°.
The one-piece rear foot is cut from a board 30 mm thick and 150 mm wide to obtain the angle that supports the backrest.
The assembly of the front and rear feet with the high and low crosspieces is achieved by gluing and screwing. Both sides are flanged on the worktop with clamps to ensure perfect symmetry.
The two "sides" are assembled in the same way as the feet. Two sleepers at the front form a ladder so that the taller child can climb and sit independently.
Once cut, the seat is fixed to the base. Screwing is done from below the sleepers by calculating the depth of the pilot holes and the length of the screws so as not to pierce the seat.
The blank mounting of the backrest and the armrests makes it possible to check the angle cuts. Before fixing them, the decorative cuts and the engraving works are executed on the file.
Two grooves in the armrests allow the seat belt to pass. The ridges are then broken using a chaisière (wood grater) and sandpaper.
Before applying the paint in 3 layers, several sanding with abrasives of different grains are necessary (successively 80, 120 and 180). The last pass is made after moistening the surface to lift the wood grain and get a perfect finish.
Supplies (solid pine, dimensions in mm)
• Rear feet: (2 x) 690 x 150 x 30
• Front feet: (2 x) 600 x 40 x 30
• Sleepers: 2 cleats of 2000 x 40 x 30
• Seat: 280 x 280 x 20
• File: 300 x 280 x 20
• Armrests: 90 x 90 x 20
• Wood screw 6 x 35
• Wood glue
• 80, 120 and 180 grit sandpaper