Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
  • A47B13/00—Details of tables or desks
  • A47B13/02—Underframes
  • A47B13/04—Underframes of wood
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
  • A47B13/00—Details of tables or desks
  • A47B13/02—Underframes
  • A47B2013/026—Underframes having three or four legs connected in a central knot
  • A47B2013/027—Underframes having three or four legs connected in a central knot without additional connecting element

Definitions

• the present invention relates to an assembly device making it possible to join together at least three pyramidal or conical legs (or uprights) of triangular, polygon, elliptical or circular section, in order to quickly compose, a rigid base for table, seat, etc. .. (example Fig.l).
• This assembly device is self-locking and removable, requiring no additional attachment to ensure the 'rigidity of the legs.
• the present invention aims to remedy all these drawbacks and to provide a simple assembly system that can be produced industrially by the use of machining assemblies in the case where the feet are made of wood.
• the feet slide between them in notches or buttonholes which follow the shape of the feet and lock at a determined level due to their pyramidal or conical shape of triangular, polygon section, elliptical or circular.
• n elements of any section provided that the parts are of convergent, pyramidal or conical shape, n-1 elements each having a single notch intended to receive by sliding until a neighboring element is blocked so as to obtain a self-locking and removable assembly.
• n-1 notches on one of the elements receive the n-1 other elements which can slide until they are blocked, although this solution weakens the solidity of the supporting upright.
• FIG. 2 represents an elevation view before the legs N "1, N" 2, N V 3 are assembled together.
• the two notches, in the shape of a dovetail, are not made on the same foot.
• FIG. 3 the feet N'1 & N ° 2 are assembled together, and the foot N " 3 before assembly is ready to slide in the notch of the feet N " 2.
• the foot N * l slides up to to the blocking in the notch of the foot N ° 2 and lets pass the foot i ⁇ " 3 in the notch of the foot N I.
• FIG 4 the three pyramidal feet of equilateral triangular section N "1-2-3 are assembled according to the invention.
• the faces of the feet are named by the numbers 4,7,10, which will serve as benchmarks for yaws on each side of the 3 feet.
• Figure 5 is the plan view of the foot N " l, on the three faces 4,5,6, as well as the section AA of the foot seen from above;
• Figure 6 is the plan view of the foot N * 2, on the three faces 7,8,9, as well as the section BB of the foot seen from above;
• Figure 7 is the plan view of the foot N * 3 on the three faces 10,11,12, as well as the section CC of the foot seen from above.
• the depth of the dovetail-shaped notches is optimum when it corresponds to 1/3 of the thickness, that is to say of the height of the triangle formed by the section of the foot at the level of the assembly for a compromise of maximum solidity when the foot is made of wood.
• the definition would be different.
• a dovetail-shaped notch whose bottom (see foot N " 1, FIG. 5, face 5 mark 19 and section AA mark 19 '), (see foot N " , figure 6, side 8 mark 21 and section BB mark 21') or parallel to the face of the feet (see foot N ° l, figure 5, section AA item 4), (see foot N'2, figure 6, section BB item 7).
• the notch of conical cylindrical shape would have a depth equal to 2/3 of the total thickness of the foot at the level of the assembly and this to preserve the self-locking assembly system.
• the slopes of the dovetail-shaped notches are 60 ', taking into account the equilateral triangular section of the feet and also in a more or less accentuated spindle depending on the sheathing of the foot.t see figure 5 face 4 mark 20; and see Figure 6, side 7, item 22).
• the precision of the notches or the buttonholes possibly gives the precision of the positioning of the feet relative to each other.
• the structures described can be made from different materials: wood, plastic, metal.
• the sheathing of the pyramid-shaped feet of triangular section can be achieved simply by using at most 3 successive machining assemblies, whatever the length of the three feet, using a conventional planer or by the use of a planer with several cutting tools, therefore with fewer operations.
• the dovetail-shaped notches of constant depth (bottom parallel to the face), can be easily made by using a machining assembly to be positioned on the feet, using and proceeding to the routing with a portable router fitted with a conical cutter at 60 'with a slope.
• the main application of this structure is the production of legs for tables, desks, seats, pedestal tables, shelving, bookcases by covering the legs which become uprights and other furniture.
• This invention can be extended to other applications, such as structures for building scenerys, tents, etc.), or construction toys.
• the invention is not limited to the assembly described above, but also to all variants of execution and application, the use of buttonholes in place of dovetail notches is an example. .

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Wood Science & Technology (AREA)
• Furniture Connections (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=9450300

Family Applications (1)

Country Status (3)

Families Citing this family (5)

Family Cites Families (4)

• 1993
  • 1993-08-19 FR FR9310107A patent/FR2709049B1/fr not_active Expired - Fee Related
• 1994
  • 1994-08-16 EP EP94925513A patent/EP0664680A1/de not_active Withdrawn
  • 1994-08-16 WO PCT/FR1994/001009 patent/WO1995005102A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events