UNIT FOR CONNECTING PARTS

Abstract

The invention relates to detachable connections for pieces, mainly rigid ones, and can be used, in particular, for connecting elements of building constructions, for example, transparent domes, equipment frame bodies, furniture and toy elements etc. In the joint for connecting pieces having a curved surface, which comprises projections arranged on mated sides of the pieces, said projections having bulbous widenings at their ends and necks at their bases, and complementary grooves in the form of bulbous cavities that correspond to the bulbous widenings of the projections and change into narrow channels that match the necks of the projections, and wherein the surfaces of the ends of the projections and the surfaces of the bottom of the grooves mated thereto have conical shape, and the tips of the surfaces of the ends of projections and the bottom of the cavities are arranged on opposite sides relative to the connected pieces, the side surfaces of the projections and the side surfaces of the grooves mated thereto are formed by moving a straight line along the guide path, which is the intersection line of the spherical surface with the cylindric surface formed by moving a straight line along an S-shaped guide path, and wherein the side surfaces of the projections and the side surfaces of the grooves are smoothly mated with the surfaces of the ends of projections and the surfaces of the bottom of the grooves, respectively. A joint for connecting pieces delimited by curved surfaces is created.

Claims

1. A joint for connecting pieces 1,2, which comprises projections arranged on mated sides of the pieces, said projections having bulbous widenings 3 at their ends and necks 4 at their bases, and complementary grooves in the form of bulbous cavities 5 that correspond to the bulbous widenings 3 of the projections and change into narrow channels 6 that match the necks 4 of the projections, and wherein the surfaces 7 of the ends of the projections and the surfaces 8 of the bottom of the grooves mated thereto have conical shape, and the tips 11,12 of the surfaces 7 of the ends of projections and the surfaces 8 of the bottom of the cavities are arranged on opposite sides relative to the connected pieces 1,2, characterized in that the side surfaces 13 of the projections and the side surfaces 14 of the grooves mated thereto are formed by moving a straight line 15 along the guide path 16, which is the intersection line of the spherical surface 17 with the cylindric surface 18 formed by moving a straight line 19 along an S-shaped guide path 20, and wherein the side surfaces 13 of the projections and the side surfaces 14 of the grooves are smoothly mated with the surfaces 7 of the ends of projections and the surfaces 8 of the bottom of the grooves, respectively.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The essence of the invention is further explained by way of example with reference to the following drawings, in which:

[0018] FIG. 1 shows connected fragments of pieces, plan view;

[0019] FIG. 2 shows fragments of pieces in disconnected position;

[0020] FIG. 3 shows A-A section of FIG. 1;

[0021] FIG. 4 shows B-B () section of FIG. 1;

[0022] FIG. 5 shows C-C (B-B) section of FIG. 1;

[0023] FIG. 6 shows the guide path along which moves a straight line when forming the side surfaces of the projections and the grooves;

[0024] FIG. 7 shows the side surface of the projections and the cavities, which is formed by a straight line moving along the guide path, which is the intersection line of the spherical surface with the cylindric surface formed by moving a straight line along an S-shaped guide path;

[0025] FIG. 8 shows pieces in the process of connection thereof (axonometric projection);

[0026] FIG. 9 shows connected pieces (axonometric projection).

PREFERRED EMBODIMENT

[0027] A joint for connecting pieces 1 and 2 having a curved surface, in this particular example a spherical surface, comprises projections arranged on mated sides of the pieces, said projections having bulbous widenings 3 at their ends and necks 4 at their bases, and complementary grooves in the form of bulbous cavities 5 that correspond to the bulbous widenings 3 of the projections and change into narrow channels 6 that match the necks 4 of the projections. The surfaces 7 of the ends of the projections and the surfaces 8 of the bottom of the grooves mated thereto have conical shape. The guide path 9 of the conical surface 7 passes through the tip 11, and the guide path 10 of the conical surface 8 passes through the tip 12, the tips 11 and 12 being arranged on opposite sides relative to the connected pieces.

[0028] The side surfaces 13 of the projections and the side surfaces 14 of the grooves mated thereto are formed by moving the segments 15 of a straight line along the guide path 16 (see FIG. 7). The guide path 16 is the intersection line of the spherical surface 17 with the cylindric surface 18. The side surfaces 13 of the projections are smoothly mated with the surfaces 7 of the ends of projections, and the side surfaces 14 of the grooves are smoothly mated with the surfaces 8 of the bottom of the grooves.

[0029] Pieces 1 and 2 are connected in the following way. The pieces are first aligned at an angle to each other (see FIG. 8), with the bulbous widenings 3 of piece 2 entering the bulbous cavities 5 of piece 1; then the pieces 1 and 2 are turned relative to each other, with the widenings 3 being placed inside the cavities 5. Correspondingly, the necks 4 of the projections of each piece are placed inside the narrow channels 6 of the other piece. The mutual rotation of the pieces 1 and 2 ceases when the surfaces of the widenings 3 run into the surfaces of the cavities 5. A rigid composite casing is formed, which works in compression/tension and in shear in virtually the same way as a solid casing; the assembled construction works in bending only in one direction, i.e. when the bending moment has the same direction as the direction of rotation of the pieces during the assembly thereof. The construction is disassembled in reverse order.

INDUSTRIAL APPLICABILITY

[0030] The invention can be manufactured by means of common construction materials and factory equipment. In applicant's opinion, this enables to conclude that the invention conforms to the criterion Industrial Applicability (IA).