Joint For Flat Parts

Abstract

The invention is directed at developing a joint for flat rigid parts, which works in tension, in bending and in shear.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is further illustrated, by way of example, with reference to the accompanying drawings in which:

FIG. 1 is a plan view of the invention as claimed in claim 1;

FIG. 2 is a view of the part 1;

FIG. 3 is a section of FIG. 1 on the A-A line;

FIG. 4 is a cross-sectional view of the invention as claimed in claim 3, where one of the connecting details is embodied in the form of a through-thickness composite part;

FIG. 5 is a view of the invention as claimed in claim 2, where the radiuses of curvature of the conical surfaces tend to infinity;

FIG. 6 is a section of FIG. 5 on the B-B line;

FIG. 7 is a scheme illustrating the process of parts joining.

PREFERRED EMBODIMENT

The joint for flat parts 1 and 2 comprises projections, which are embodied on the mating sides of the parts in the form of bulbous breadths 3 at the edge thereof and necks 4 at the basis thereof, and complementary joggles, which are embodied in the form of bulbous slots 5 corresponding to the bulbous breadths 3 of the projections and gradually changing into grooves 6 corresponding to the projections necks 4. The surfaces 7 of the projections edges and the surfaces 8 of the slots bottoms mating therewith are embodied in the form of cones. The guiding line 9 of the conical surface 7 passes through the peak 11, and the guiding line 10 of the conical surface 8 passes through the peak 12; the peaks 11 and 12 are arranged on the opposite sides with respect to the connecting parts.

Generally the radius of curvature R of the guiding lines of the conical surfaces 7 and 8 (the radius of curvature of the projection is equal to the radius of curvature of the slot within the accuracy of the value of the gap between the connecting parts 1 and 2) have limited values. In this case the guiding lines of the conical surfaces 7 and 8 have the shape of curved lines (see FIG. 1). However, if R tends to infinity, the shape of the guiding line of the conical surface tends to a straight line (see FIG. 5).

At least one connecting part can be embodied in the form of a through-thickness composite part (see FIG. 4). In this case the part 2 consists of two pieces: upper piece 2a and lower piece 2b.

Parts 1 and 2 are joined in the following way. At first the parts are overlapped in such a way that their surfaces are positioned at an angle that is close to a right angle (see FIG. 7), and the bulbous breadths 3 of the part 2 enter the bulbous slots 5 of the part 1; then the parts 1 and 2 are turned relative to each other, whereupon the breadths 3 are placed into the slots 5. Accordingly, the necks 4 of the projections of each part are placed into the grooves 6 of another part. The mutual rotation of the parts 1 and 2 is stopped when the conical surfaces 7 of the breadths 3 meet the conical surfaces 8 of the slots 5, wherein both parts will be located in the same plane. Thus, a uniform rigid plate is formed capable of working in tension-compression and in shear, virtually in the same way as a whole plate; the assembled construction works in bending in only one direction, namely when the bending moment has the same direction as the rotation of the plates during the assembly process. The disassembling of the construction is performed in reverse order.

INDUSTRIAL APPLICABILITY

Known simple industrial equipment and constructive materials common in the art are used for the production of the inventive device, which enables to conclude that the inventive device conforms to the criterion “Industrial Applicability” (IA).

Claims

1. A joint for flat rigid parts, comprising projections, which are embodied on the mating sides of the parts in the form of bulbous breadths at the edge thereof and necks at the basis thereof, and complementary joggles, which are embodied in the form of bulbous slots corresponding to the bulbous breadths of the projections and gradually changing into grooves corresponding to the projections necks, characterized in that the surfaces of the projections edges and the surfaces of the slots bottoms mating therewith are embodied in the form of cones, wherein the peaks of the conical surfaces of the projections edges and of the slots bottoms are arranged on the opposite sides with respect to the connecting parts.

2. A joint as claimed in claim 1, characterized in that the radius of curvature of the guiding lines of the conical surfaces of the projections edges and of the slots bottoms are embodied in such a way that they tend to infinity.

3. A joint as claimed in claim 1, characterized in that at least one connecting part is embodied in the form of a through-thickness composite part.

4. A joint for flat parts having a first mating side and a second mating said, said joint comprising: a first series of projections formed on said first mating sides and having a bulbous breadth at the edge thereof and a neck at a basis thereof;a second series of projections formed on said second mating side and having a bulbous breadth at the edge there of and a neck at a basis thereof;complementary joggles corresponding to said first bulbous breadths and said second bulbous breadths respective, such that said joggles gradually changing into grooves corresponding to the projections necks.

5. The joint for flat parts of claim 4, wherein said joggles are embodied in the form of bulbous slots.

6. The joint for flat parts of claim 5, wherein the surfaces of the projections edges and the surfaces of the slots bottoms mating therewith comprise cones having a guiding line on a conical surface that passes through a peak, and wherein said guiding lines and said peaks are arranged on the opposite sides with respect to the connecting parts.

7. The joint for flat parts of claim 6, wherein a radius of curvature R of the guiding lines of the conical surfaces is equal to the radius of curvature of the slot within the accuracy of the value of the gap between the connecting parts.

8. A method of assembling the joint for flat parts of claim 7, said method for connecting an upper piece to a lower piece and comprising: a. Overlapping said upper piece and said lower piece in such a way that their surfaces are positioned at an angle that is close to a right angle;b. Entering bulbous breadths of the lower piece into enter the bulbous slots of the upper piecec. Placing the projections of each upper piece laced into the grooves each mating lower piece, respectively;d. Rotating said upper piece relative to said lower pieces until conical surfaces of the breadths meet the conical surfaces of the slots, wherein both parts will be located in the same plane.

9. The joint for flat parts of claims 1 or 7, wherein a uniform rigid plate is formed capable of working in tension-compression and in shear, virtually in the same way as a whole plate.

10. The joint for flat parts of claim 9, wherein an assembled construction works in bending in only one direction, namely when the bending moment has the same direction as the rotation of the plates during the assembly process.

11. The joint for flat parts of claim 10, wherein disassembling of the construction is performed in reverse order.