RU2677620C1 - Insert connector for hollow profiles - Google Patents

Abstract

FIELD: manufacturing technology.SUBSTANCE: invention relates to an insertion connector for hollow profiles. Plug-in connector comprises one middle and two side walls adjacent thereto, with lateral locking elements arranged one after the other in the insertion direction of the hollow profiles. At least a part of the fixing elements is made in the form of bent and protruding tongues with two or more sharp apices, each of the vertices is disposed with an offset relative to other vertices across the insertion direction of the hollow profiles.EFFECT: invention allows to create a plug-in connector for hollow profiles for spacers of insulating glazing with improved fixing elements.5 cl, 4 dwg

Description

The invention relates to a plug-in connector for hollow profiles with signs of a restrictive part of the main claim. Such a straight plug-in connector is known from RU 2092556 C1.

The plug-in connecting element for hollow predominantly rectangular sections of the profiles is made in the form of a stamped or bent metal part, which has one middle and two side walls adjacent to it with several locking elements positioned at the same height. The locking elements are arranged in the direction of insertion of the hollow profiles one after another. The connecting element is provided with an emphasis for hollow profiles formed by spring protrusions.

According to US-A-3643989, a connector for fixing a hollow profile of a plastic material is known, consisting of a prismatic base made of a hard plastic material, containing on one side an elastic metal plate with bent obliquely protruding, springy and sharp-edged tongues that form the locking elements included meshing with the walls. To avoid bending of the thin plastic walls of the connected cavities, the tongues can have leading edges of different shapes.

In the prior art, all the locking elements are arranged sequentially in one row. Since the clamps have dimensions and protrude within tolerances of a different size, the latter have different fixing ability. Fixation occurs when you try to remove the connector from the profile, while the locking elements cut into the walls of the profile, leaving longitudinal traces. In the position inserted into the hollow profile, the least bent locks have the smallest depth of cut. Therefore, less protruding locking elements positioned in line with the track have less contact with this track and perform a correspondingly smaller locking function.

A known solution according to RU 2264520 C2, where the designated locking elements are arranged in series with offset relative to each other. As a result, each locking element has contact with the hollow profile with a separate trace of penetration, which improves the locking ability of the connector, because the number of contact points with the desired depth of penetration along the connection direction corresponding to the number of fixing elements is provided.

In the known solution, each of the sequentially fixing elements in the form of a tongue bent at an acute angle has only one contact point. Since all the locking elements are made within the tolerance, in addition, a hollow profile is made within the tolerance, due to deviation of the dimensions of the elements and profile from the nominal, such a combination of sizes is possible that cutting a single tip of the fixing element will be insufficient for the required quality of the profile connection. As a result, the number of contact points providing the required quality of fixation will be uncertain. In addition, during insertion of the connector into the profile, the latter is deformed, and the largest deformation in the direction of movement of the connector is observed in sections at the input end of the profile, since all the fixing elements of the connector pass through these sections in sequence. This leads to a weakening of the fixation of the connector with a hollow profile in the areas near the input end.

The aim of the present invention is to provide a plug-in connector design with an improved element fixing system.

This goal is achieved by the features of the claims.

Each fixing element - tongue - is made in the form of a plate bent from the side wall at an acute angle to the direction opposite to the direction of the insert of the plate connector, equipped with two sharp peaks cutting into the hollow profile located at the edges of the protruding end of the plate. Bent plates are made with different widths. As a result, the reliability of fixation of each tongue is increased compared to the known technical level due to the increased likelihood of a tight contact between the tongue and the surface of the hollow profile for at least one of the two cutting points. In addition, such cut-in points on different tongues are displaced in the transverse direction relative to each other, due to which they can act on the adjacent side wall of the hollow profiles in different places. This improves the fixation of the plug-in connector in the hollow profile, since the various locking elements perform their locking function at a larger number of insertion points and more evenly.

Particular advantages arise for plug-in connectors made in the form of stamped or bent metal parts. In this case, the locking elements can be obtained as a result of the sequence of operations cutting holes, cutting with a flexible locking tab. The sharp peaks of the tongue crashing into the profile are formed as a result of these operations. Compared with the known technical level, this design provides increased rigidity of the side walls, since the cutouts forming the locking elements do not cross the external contour of the side walls

Push-in connectors may also consist of other materials and combinations of these materials.

The invention as an example and is schematically depicted in the drawings, which represent:

- FIG. 1 - plug-in connector with a hollow profile in a perspective view.

- FIG. 2 is a longitudinal section through a plug-in connector with a profile

- FIG. 3 is a cross-sectional view of the plug-in connector in the region of the locking elements.

- FIG. 4 is a view of a locking element.

In the drawings (Fig. 1 - Fig. 4), a plug-in connector 1 is shown for connecting hollow profiles 2. Hollow profiles 2 can have any section, preferably for insulating window structures, the profile has a rigid box structure with a section inscribed in a rectangle. In FIG. 3 shows a cross section of a hollow profile with a connector inserted into it.

The plug-in connector 1 for hollow profiles 2 is shown in FIG. 1-4. The housing of the connector 1 is placed inside the profile 2 and can have any cross section. In an advantageous embodiment, the housing of the connector 1 is made in the form of a U-shaped profile with open ends 3 to ensure the pouring of desiccant. The U-shaped profile has a base 4 with side walls 5 bent on both sides, on which the fixing elements 7, 8, 9 are placed along the connector insert direction 6. The number of fixing elements can be different. Each fixing element (7, 8, 9) is made in the form of a tongue sharply bent relative to the side wall 5. The bending direction of the tongues (7, 8, 9) is opposite to the direction 6 of the insertion of the connector into the hollow profile 2. Each tongue of the locking elements (7, 8, 9) has at least two sharp peaks 13 and 14 located at a distance h from each other ( Fig. 4). For each of the elements (7, 8, 9), the values of h take the values of h7, h8, h9, respectively (Fig. 2), and the condition of inequality of their values is fulfilled. Thus, the sharp peaks 13 and 14 of all the locking elements (7, 8, 9) are located with relative relative displacement across the direction 6 of the connector insert. As an embodiment, additional lateral displacement of the vertices 13 and 14 can be achieved due to the different heights of the arrangement (17, 18, 19) of the tabs of the fixing elements (7, 8, 9) on the side walls 5 (Fig. 2).

In a preferred embodiment, the locking elements (7, 8, 9) are formed as a result of cutting operations of the hole 10 and then the notch 11 and the tongue 12 are flexible, and the sharp peaks of the tongue 13 and 14 cutting into the profile 2 are obtained as a result of these operations. A different way of executing the fixing elements 7, 8, 9 is possible.

In a preferred embodiment, the locking element 9, located at the input end of the connector 1, has the smallest value 9, and the closing element 7 has the largest value h7. The holes 10 are located at a distance not less than the value of b from the upper edge 18 of the side walls 5, to ensure sufficient rigidity of the side walls 5.

In the presented embodiment, the connector housing 1 is equipped with inwardly bent elements 15 from the side of the side walls 5 and 16, from the base 4. The latter form the guide part of the ends of the connector 1. In an advantageous embodiment, the connector base 4 contains longitudinal convex elements 17 for increasing stiffness and reduce friction when inserting connector 1 into profile 2.

The side walls 5 of the connector 1 contain centrally located locking elements 19, 20, made in the form of antennae, which are sharply bent in the direction opposite to the direction 6 of the insert of the connector 1.

List of reference items.

1 - connector;

2 - hollow profile;

3 - open ends to ensure pouring desiccant;

4 - base;

5 - side walls

6 - direction of insertion of the connector 1 in the profile 2

7, 8, 9 - fixing elements;

10 - hole in the side wall;

11 - incision of the tongue in the side wall;

12 - flexible tongue relative to the side wall;

3, 14 — sharp tops of the tongue cutting into the profile;

15 - elements bent inwards from the side of the side wall;

16 - elements bent inward from the base side;

17 - convex longitudinal elements on the base;

18 - upper end of the side wall;

19, 20 - locking elements in the form of bent antennae;

h - the width of the bent tab of the latch

h7, h8, h9 are the widths h of the reeds, respectively, of the latches 7, 8, 9;

17, 18, 19 - the displacement of the axis of the reeds 7, 8, 9 relative to the upper end (18) of the side wall (5);

b is the distance from the hole 10 to the upper edge 18 of the side wall 5.

Claims (5)

1. Plug-in connector for hollow profiles, in particular for insulating glazing spacer frames, comprising a base (4) and two side walls adjacent to it (5) with several locking elements (7) arranged in series in the direction of the insert (6) of the hollow profiles (7) , 8, 9), characterized in that at least a part of the fixing elements (7, 8, 9) is made in the form of sharply bent reeds, each of which has at least two sharp vertices (13, 14) located relative to the rest vertices offset to the direction (6) of the insert hollow profiles. 2. The connector according to claim 1, characterized in that the locking elements (7, 8, 9) have different widths of the bent tongues (h7, h8, h9). 3. The connector according to claim 1 or 2, characterized in that the tabs of the fixing elements (7, 8, 9) are located on the side walls at different heights (l7, l8, l9). 4. The connector according to one of the preceding paragraphs, characterized in that the bent tabs of the locking elements (7, 8, 9) protrude laterally beyond the side wall (5) by a different amount. 5. The connector according to one of the preceding paragraphs, characterized in that it is made in the form of a metal stamped-bent part of a U-shaped cross section, and the fixing elements (7, 8, 9) with sharp peaks (13, 14) are made in the form of sideways bent and acting against the direction of the insert (6), the fixing tabs formed by the holes (10), notches (11) and bends (12).

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