RU2428745C1 - Three-plate connection - Google Patents

Abstract

FIELD: mechanics.

SUBSTANCE: two mutually perpendicular plates are located on one side relative to the third plate so that two octants are formed. Sector hole the radius of which is arranged at junction point of three plates is located on the third plate. There is projection with edge on the first plate. The first and the second plate and the second and the third plate are connected so that they can be turned. The first plate has projection from continuation of conjugation line of the first and the second plates and from conjugation line of the first and the third plates. Radius of sector hole is equal to or more than distance from conjugation line of the first and the second plates to the edge of the above projection, which is located at some distance from that line and parallel to it. Projection can have a tongue.

EFFECT: higher reliability of connection, lower deformation of plates at assembly.

2 cl, 12 dwg

Description

The invention relates to compounds of three plates and can be used in the educational process in the design of folding products, in the manufacture of toys, in the furniture industry.

It is known the connection of three mutually perpendicular plates used in furniture - collapsible shelving (AS RU N 1606756, CL P16B 12/42, A47B 47/03, 1990). The connection contains three mutually perpendicular plates (two walls of the rack and shelf) and a connecting element. A disadvantage of the known compound is the impossibility of its use in folding products. In addition, when disassembling the connection, the connecting element is disassembled into separate parts, which creates inconvenience during use.

The closest analogue is the connection of three mutually perpendicular plates, used in a visual aid for descriptive geometry and described in A.S. RU N 1541657, class C09B 23/04, 1990, which consists of three mutually perpendicular plates folding onto one plane, thanks to external slots made on the opposite sides of one of the plates, and on the other, a figured hole in the form of two sectors opposite to the center of the plate, with the diameter of the figured hole is made equal to or greater than the distance between the slots of the first plate.

In addition to the above slots, each plate connecting three mutually perpendicular plates has a slot, one end of which is connected to the edge of the plate by a slit, and the other end of the slot is not closer to the center of the plate from this edge.

In the last connection, all three plates each have through slots on the corresponding edge. When assembling the compound, the edges of the plates formed by these slots are folded. This leads to a decrease in the reliability of the connection and to the inconvenience of use, since the plates are deformed, with frequent assembly and disassembly, the plates are destroyed along the interface line, and plates made of flexible material do not retain flatness.

In addition, the impossibility of making plates of rigid material, as well as the low reliability of the connection, limit the scope of use of the known compound.

The proposed device ensures the reliability of the connection of the three plates, provides the flatness of the plates or reduces the deviation from flatness, eliminates or reduces the deformation of the plates during assembly, ensures the implementation of the plates of various materials. The proposed connection can be used in products where it is necessary to fold three mutually perpendicular plates, for example, in visual aids, in toys, furniture.

The connection of the three plates, consisting of three mutually perpendicular plates, is made with the possibility of their rotation in one plane, while the first plate is connected to the second plate along the line of their conjugation with the possibility of rotation, the second plate is connected to the third plate on the line of their conjugation with the possibility of rotation. The sector hole is located on the third plate, and the intersection point of the radii of the sector is located at the intersection of the interface lines of the three plates. According to the invention, the first plate has a protrusion formed from the extension of the interface line of the first and second plates and from the interface line of the first and third plates. The first and second plates perpendicular to each other protrude on one side relative to the third plate with the formation of two octants. In this case, the radius of the sector hole is equal to or greater than the distance from the interface line of the first and second plates to the edge of the above-mentioned protrusion remote from this line and parallel to it.

In the particular case, the protrusion has a tongue created on the first plate by a slot extending along the interface line of the first and third plates, while the slot reaches the edge.

Figure 1 shows a perspective view of a three-dimensional form of the connection; figure 2 shows a flat form of connection; figure 3 is a view a in figure 1 on 1 plate (2 and 3 plates are not shown); figure 4 is a view of B in figure 1 on 3 plate (1 and 2 plates are not shown); figure 5 shows a perspective view of the three-dimensional form of the connection; in Fig.6 is a view A in Fig.5 for 1 plate (2 and 3 plates are not shown); in Fig.7 is a view of B in Fig.5 on a 3 plate (1 and 2 plates are not shown); on Fig presents a perspective view of a device containing two connections; figure 9 shows a perspective view of a three-dimensional form of the connection; figure 10 shows a flat form of connection; figure 11 presents a view of figure 9 on 1 plate (2 and 3 plates are not shown); on Fig given scan 2 and 3 of the plates for connection (Fig.9, 10).

The connection of the three plates contains three mutually perpendicular plates 1, 2 and 3 and means for their mutual movement. Means for the mutual movement of the plates is made in the form of a sector hole 4 on a 3 plate (Fig. 4, 7, 12) and on 1 plate - a protrusion 5 with an edge 6 (Fig. 3, 6, 11). The plate 1 adjacent to the mutually perpendicular plate 2 is connected to the latter rotatably by the connecting elements 7 (Fig. 1), the plate 2 adjacent to the mutually perpendicular plate 3 is connected to the latter rotatably by the connecting elements 8 (Fig. 2), where the connecting elements 7, 8 are extensions of 1 and 2 of the plate, respectively. In Fig. 5, the plates 1 and 2, 2 and 3 are rotatably connected by connecting elements - rings 9 (Fig. 5) inserted into the holes 10 (Figs. 6, 7). Figure 9 shows the connecting element 11 for 1 and 2 plates. 11, plate 1 is shown with a tongue 12 and a slot 13.

The dashed-dotted line with two points shows the fold lines (Figs. 3, 10, 11, 12). For a better fit of the rigid plates when folding the connection in a flat form 1 and 3 of the plate have grooves 14, 15 (Fig.6, 7), which include the connecting ring 9.

The assembly order of the device: plate 1 is attached to the plate 2; then, turning the protrusion 5 to the sector hole, attach the plate 2 to the plate 3.

The connection of three mutually perpendicular plates (figures 1, 5, 9) are folded as follows. The plate 1 is rotated in the sector hole to align with the plate 2, then the plate 3 is rotated counterclockwise to the plates 1 and 2.

The connection of the three plates (figure 2, 10) is converted into a volumetric form as follows. Set plate 3 perpendicular to plates 1 and 2. Then plate 1, rotating in a sector hole, set perpendicular to plates 2 and 3. Get the connection of three mutually perpendicular plates (figures 1, 5, 9).

When used in visual aid on descriptive geometry before assembly, the plates are marked with the horizontal, frontal and profile planes, the designations of the origin and coordinate axes. For the horizontal plane use 1 connection plate, for the front - 2 plate, and for the profile - 3 plate.

To demonstrate the receipt of a drawing with three views, place the object in the first octant, mark on the faces of the trihedral angle of the projection of the object, then combine the horizontal and profile faces with the front plate.

Claims (2)

1. The connection of the three plates, consisting of three mutually perpendicular plates, made with the possibility of rotation in one plane, while the first plate is connected to the second plate along the line of their interface with the possibility of rotation, the second plate is connected to the third plate on the line of their interface of rotation, the sector hole is located on the third plate, and the intersection point of its radii is located at the intersection of the interface lines of the three plates, characterized in that the first plate has a protrusion, forming different from the extension of the conjugation line of the first and second plates and from the conjugation line of the first and third plates, and the first and second, perpendicular to each other plates, protrude on one side relative to the third plate with the formation of two octants, while the radius of the sector hole is equal to or greater than the distance from the connecting line of the first and second plates to the remote from this line and parallel to the edge of the above-mentioned protrusion. 2. The compound according to claim 1, characterized in that the protrusion has a tab formed on the first plate by a slot extending along the interface line of the first and third plates, while the slot reaches the edge.

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