JPH0572309B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes an intermediate layer that can be fixed to a conveying structure;
The present invention relates to a fixing device for a conveying structure, in particular for flat and wide workpieces, such as the lining of the roof of a motor vehicle, with a fixing element arranged in an opening in the intermediate layer for fixing the workpiece to the intermediate layer or to the conveying structure.

Installing an automobile's interior lining is quite difficult. Irregular surfaces and corners must be considered,
This is because the wide spread also causes relatively large tolerances. Since it is mass produced, it is natural that efforts are made to completely install the lining, for example the so-called canopy, in the shortest possible time.

For example, for the fixing of a canopy, it is known to fix on the inside of the roof of the vehicle skin a retaining element made of a ribbed metal plate with an opening into which the fixing element for fixing the lining fits. There is. The installation of holding parts of this type, also called roof frames, and these parts themselves can be a source of corrosion phenomena that play a significant role in the automobile industry as a whole. In addition, known fastening methods require that the holes in the inner lining coincide well with the holes in the holding part. This leads to the difficulties mentioned above. Additionally, due to the differential expansion of the materials used (metal plate on the one hand and plastic material on the other), deformation and twisting of the lining material due to thermal expansion can occur.

Finally, known fastening devices for linings of this type are difficult to remove for repairs and, above all, to install without problems after repairs without damage.

The invention therefore improves the above-mentioned fixing device for conveying structures, in particular for flat and wide workpieces such as the lining of the roof of a motor vehicle, which allows for easy installation and removal even in the case of large manufacturing tolerances. It is problem-based.

The invention therefore begins from the fact that it is possible selectively to attach the workpiece to the transport structure, for example the skin of a motor vehicle, for example to attach an intermediate layer supporting a canopy.

This problem is solved according to the invention by providing several insertion holes arranged in the opening of the intermediate layer, oriented in the same direction and arranged on one side, and located at one end between the intermediate layer and the girder structure. The invention is solved by a honeycomb body with an extension, a head, and a fastening element with a shank that can be inserted into one of the insertion holes of the honeycomb body and held therein.

The intermediate layer can be fixed, for example by gluing. The intermediate layer retains the honeycomb body, which is passed through the openings in the intermediate layer, on the transport structure. The thickness of the honeycomb body can be sized to match the thickness of the intermediate layer.

However, the honeycomb body can also protrude to the outer surface of the intermediate layer.

The honeycomb body has several insertion holes arranged next to each other for receiving the shank of the fixing element. The honeycomb body thus makes it possible to install the fixing element within a relatively large area. It is therefore possible to compensate for abnormally large tolerances without compromising the fixing or making the assembly difficult.

The device according to the invention not only allows considerable tolerances but also provides the possibility of problem-free removal of the lining. The connection between the fastening element and the honeycomb body can be effected in such a way that it can be separated by a more or less large pulling force applied to the fastening element.

The honeycomb body is not fixed by itself,
As already mentioned, it is held to the transport structure by the layer. In this connection, the extension is provided with a thin radial flange.

The entire surface of the intermediate layer is parallel to the plane. The honeycomb body is fixed radially within the opening.

The intermediate layer may desirably be a corrugated layer. The layer is applied, for example, to the inside of the roof of a motor vehicle, with the honeycomb body being previously received in a corresponding opening.

The insertion holes preferably have a hexagonal cross section and are arranged in a honeycomb pattern. This formation of the bayonet holes allows for a close "packing" of the bayonet holes and a uniform thickness of the walls of the individual bayonets, so that the shank of the fastening element hits the thick wall and does not move against the bayonet. This avoids the danger of having to laboriously center the shaft.

For simple and effective fastening of the fastening element, the insertion hole can have a stop part that cooperates with a stop part on the shank of the fastening element. This stop portion can be formed by a radial projection in the bayonet.
Also, the insertion hole desirably tapers into a funnel shape toward the stop portion.

The shank of the fixation element may have at least one and preferably several axially spaced annular ribs. The annular rib has a serrated cross-sectional shape, with the steeply sloped side of the rib pointing toward the head. Such a design of the annular rib allows lower insertion forces and higher withdrawal forces. Several annular ribs make it possible to mount workpieces of different thicknesses, each of which can be mounted under stress if desired.

The diameter of the opening in the workpiece can be much larger than the diameter of the shank of the fixing element. This also provides tolerance compensation. Furthermore, thermal expansion of the workpiece is thereby possible without affecting the fixing.

It is particularly advantageous if the honeycomb body is made of an elastic material, preferably thermoplastic rubber. It allows a relatively flexible fixing of the fixing element. Furthermore, it allows a tilting of the shank of the fixing element. Thus, for example, a fixed lining can be installed without affecting the safety of the fixing or damaging the material.
be placed in a "working" position.

Embodiments of the present invention will be described below with reference to the drawings.

Before proceeding with the explanation, it should be stated that each of the described parts has an important meaning in terms of the invention either by itself or in relation to the features of the claims.

In FIG. 1, a layer 11 is fixed by adhesive to a metal plate 10, for example a body plate in the area of the roof of a motor vehicle. The layered body 11 is made of cardboard, for example. The layer 11 has an opening 12 in which a honeycomb body 13 is arranged. This honeycomb body has a flange 14 at the upper end, and this flange 1
4 is shaped like a conical ring and is placed in a recess 15 around the edge of the opening 12. The honeycomb body 13 is therefore held on the thin plate 10 by the layers 11. A fixing element 16 with a head 17 and a shaft 18 extends through a large opening 19 in a workpiece 20 to be fixed. The work 20 is, for example, the lining (canopy) of the roof of an automobile. Details of the parts shown in FIG. 1 will become apparent from the other figures.

The fastening element according to FIG. 2 is made of plastic in one piece. The lower side of the head 17 is flat and its upper side is spherical.

The shaft part 18 is cylindrical at the top and has several annular ribs 21 spaced apart in the axial direction in the middle part. The rib 21 has a serrated cross-section, and the head 1
The side facing 7 is steeper than the other sides. The tip of the shaft portion 18 is tapered into a conical shape as shown at 22. Polyamide, for example, can serve as a material for the fastening element.

As is clear from FIGS. 3 and 4, the honeycomb body 13 has a series of insertion holes 23 having a hexagonal cross-sectional shape.
, and these holes are arranged in a honeycomb shape, as can be seen in Figure 4. A radial stop 24 is formed in each side wall of the insertion hole 23, which widens radially from top to bottom (FIG. 3), so that a funnel-shaped inlet 25 is created in the upper part of the insertion hole 23. . After the relatively short straight exit of the stop part 24, a shoulder 26 is formed by the diameter enlargement of the bayonet hole 23.

The honeycomb body 13 consists of an elastic material, preferably thermoplastic rubber. When the fixing element is inserted into one of the holes 23, the conical tip 22 of the shank 18 is introduced into the funnel-shaped inlet 25. The wall between the bayonet holes is then deformed more or less radially until the first side of the first radial rib snaps behind the shoulder 26. Further force can be applied to push the shaft 18 forward an arbitrary distance.

The walls of the honeycomb body can remain under stress when the shank 18 is inserted, so that the shank 18 is held in the insertion hole 23 with sufficient reliability. Shaft part 18
The engagement between the shank and the insertion hole 23 is such that the shank can be removed again with a correspondingly high pull-out force.

The honeycomb body 13 has many insertion holes 23, so that the fixing element 16 can engage with any of the holes 23. Therefore, the inner lining 20 is replaced by a thin plate 10.
A relatively large area is available for fixing, and the lining 20 does not suffer from deformation.

The relatively large diameter of the aperture 19 in the lining 20 allows the lining 20 to be
Relative movement with respect to a fixation of 0 is also possible.

[Brief explanation of the drawing]

1 is a cross-sectional view of the fixing device according to the invention at an intermediate stage of assembly; FIG. 2 is a side view of the same fixing element; and FIG. 3 is a partially sectional side view of the honeycomb body of FIG. , FIG. 4 is a plan view of the honeycomb body seen from the direction of arrow 4 in FIG. 13 is a honeycomb body, 14 is an extension part,
16 is a fixing element, 17 is its head, 18 is also a shaft, and 23 is an insertion hole.

Claims (1)

[Claims] 1. Intermediate layer 1 having openings 12 in conveying structure 10
1 is fixed, and a honeycomb body 13 having a number of insertion holes 23 distributed inside the opening 12 is fixed so that the insertion holes open to the open surface of the opening 12. A workpiece 20 covering the intermediate layer 11 is attached to the shaft portion of the fixing element 16 having a
By inserting the shaft portion that penetrates through the body and protrudes from the workpiece into one of the insertion holes 23 of the honeycomb body 13 and holding it in the hole, the head 17 of the fixing element presses the workpiece against the honeycomb body 13 and holds the workpiece. Transport structure 1
A workpiece fixing device characterized by fixing the workpiece to zero. 2 The honeycomb body 13 fixed inside the opening 12 of the intermediate layer has a thin flange 14 sandwiched between the carrier and the intermediate layer 13 at the end in contact with the carrier 10.
A workpiece fixing device according to claim 1. 3. The workpiece fixing device according to claim 1, wherein the insertion holes 23 of the honeycomb body 13 have a hexagonal cross-sectional shape and are arranged in a honeycomb shape. 4. The insertion hole 23 of the honeycomb body 13 has a stop portion 24 that non-returnably engages with the stop portion 21 provided on the shaft portion 18 of the fixing element 16. The workpiece fixing device described in section. 5 Stopping portion 2 of insertion hole 23 of honeycomb body 13
4. The workpiece fixing device according to claim 4, wherein 4 is formed by a radially inward protrusion. 6. The workpiece fixing device according to claim 4, wherein the insertion hole 23 of the honeycomb body 13 tapers into a funnel shape toward the stop portion 24. 7. The workpiece fixing device according to any one of claims 1 to 6, wherein the shaft portion 18 of the fixing element 16 has at least one annular rib 21. 8 The annular rib 21 of the shaft portion 18 of the fixing element 16 is
8. The workpiece fixing device according to claim 7, wherein the cross-sectional shape is serrated, and the steep slope of the annular rib (21) faces the head (17). 9. The workpiece fixing device according to any one of claims 1 to 8, wherein the honeycomb body 13 is made of an elastic material. 10. The workpiece fixing device according to claim 9, wherein the honeycomb body 13 is made of thermoplastic rubber. 11. A device for fixing a workpiece according to any one of claims 1 to 10, wherein the fixing element 16 is made of plastic. 12. Any one of claims 1 to 11, wherein the diameter of the attachment hole 19 formed in the workpiece 20 to pass through the shaft portion 18 of the fixing element 16 is larger than the diameter of the shaft portion 18. The workpiece fixing device described in .