DE1256111B - Heel point with embedded fasteners - Google Patents

Description

GERMAN PATENT OFFICE

EDITORIAL

German class: 71 a -21/44

Number: 1256111

File number: C 27355 VII a / 71 a

J 256 111 filing date: June 30, 1962

Opened on: December 7, 1967

The invention relates to a heel with embedded fasteners attached to the The contact side protrude and can be lowered into this to establish the connection with a heel stump are.

It is already known a metallic plate embedded in a heel, which is attached to the Edges z. B. has prongs formed by punching that are at right angles or approximately at right angles are bent and protrude on the contact side of the heel. These fasteners are with regard to the shape of their plate largely the plan shape of the associated heel customized. It therefore requires a large number of fastening elements corresponding to the heel patches and the manufacturing tools required for this.

The invention is based on the knowledge that a sufficiently secure attachment of the heel This is also ensured if the fastening elements have one of the shape of the heel point have a different approximately rectangular plan. In pursuit of this idea lies the invention Task is based on a known, freely available in various sizes in the trade, to propose itself intended for other purposes fastening element that is a sufficient secure fastening of the heel point guaranteed.

This object is achieved according to the invention in that an embedded, known per se metallic Plate with prongs bent on one side out of the plane of the plate in the form of a belt connector commercial type is used.

You can choose from the many different types of belt connector available on the market now the most suitable elements matched to the size of the paragraph point are selected.

The belt connectors combine all the properties required for the new area of application. The strength and dimensions of the tines are carefully matched in leather or to be able to be driven into leather-like materials, whereby the selected type and the The angle of the tine tips also have a favorable effect.

Also all considerations made in the manufacture of belt connectors, including low costs to combine a high utility value with regard to a usually one-time use, correspond the requirements of use as a connecting element on a running spot.

In addition, the belt connectors meet the heel point embedded in this way for reasons of weight saving
Fasteners

Applicant:

Continental Gummi-Werke Aktiengesellschaft,
Hanover

Named as inventor:

Dr. Wilhelm Messner, Hanover

as narrow as possible cross connections between the tines fully meet the requirement, the intimate connection of the parts above and below also between the webs of the prongs to enable the heel.

To get the heel stump through the row-wise arrangement of the fastening prongs when making the connection not to drift apart and to distribute the stops as evenly as possible the prongs are offset from one another within the row and / or with respect to the other row.

To ensure a firm contact of the edges of the heel point on the heel stump, the Contact surface of the heel is concave, so that the webs of the prongs in their entirety and the running surface follow the curvature, i.e. the entire heel point slightly at the edges is curved at the top. The production is preferably carried out in vulcanization molds with flat boundary surfaces, to which the web part of the belt connector is placed parallel in the mold. Only after End of the vulcanization process or after the molding of the plastic body has been completed, it is bent the heel spots with a suitable pressing tool in the shape described, the parallelism of the individual surfaces is also retained in the spherical shape. There is also the possibility vulcanize larger plates with a certain number of embedded belt connectors where the individual heel spots are punched out, and when punching through suitable shaping of the tools to impress the deflection.

It may be advantageous to provide the prongs with different lengths so that, for. B. the the corners located deeper into the material of the heel stump. This will be the greatest

709 707/160

Claims (4)

Durability achieved where the greatest loads are likely to occur. In order to increase the durability of the prongs in the heel stump, the flanks of the prongs can have depressions and / or projections which are preferably designed so that they cause less resistance when the prong penetrates into the heel stump than in the case of a reverse movement. Furthermore, it must be recognized as advantageous if the prongs are completely or partially provided with beads, whereby the risk of buckling or bending when driving into the heel stump is reduced. Driving the prongs into the heel stump can also be facilitated by heating them. Various exemplary embodiments of the invention are illustrated in the drawing. It shows F i g. 1 is a top plan view of a heel patch with embedded strap connectors, FIG. 2 to 6 other exemplary embodiments of the plate with the fastening prongs, FIG. 7 shows details in the design of the prongs. DerAbsatzfleckl bears the plate 2 embedded, which has the bent prongs 3 at the edges. The plate 2 is arranged parallel to the running surface 4 and the contact surface 5 and adapted in plan to the outer contours of the heel so that the prongs 3 are everywhere at a uniform distance from the side surfaces. The prongs 3 are shaped into a point 8 at their ends. In the embodiment according to FIG. 1, a belt connector of a commercially available type is embedded in the heel 1, in which the webs 6 match the width of the prongs 3 and are connected to one another by the cross connections 7. The shape of the prongs 3 is illustrated by the original layer 8 shown in dashed lines. In the case of the belt connectors, the narrow cross connections 7 and the spaces formed thereby between the webs 6 always provide the prerequisites for creating connection points between the parts of the heel that lie above and below the webs 6. The heel 1 can also have one shown in FIG. 2 illustrated shape are given, in which the edges are bent up to the contact surface of the heel stump. In this design, the edges are at least partially elastically deformed when the heel 1 is fastened, whereby a firm contact of the edge zones is achieved as a result of the restoring force. This hollow shape of the heel is expediently formed only after complete completion or is bent at the same time as the piece is punched out of a prefabricated plate. According to FIG. 3 and 4 have been selected for better distribution of the fastening points, belt connectors, the prongs 3 of which are arranged offset to one another in four rows. The prongs 3 with the smaller row spacing are expediently placed in the rear rounded part of the heel in order to also have fastening parts close to the rear edge, and accordingly a pair of prongs with the larger spacing is advantageously arranged at the front (FIG. 4). In addition, the selection of belts which can be seen from FIGS. 2 and 3 is favorable, the length of which tines are different, since the longer tines 3 can then be provided at the particularly stressed points. In Fig. 5 it is indicated that belt connectors with prongs 3 offset within the row and with respect to the other row can also be used, as a result of which the fastening points are distributed even more over the existing surface. In Fig. 6, the prongs 3 are each arranged offset to the opposite row and show a curved profile, whereby the flexural strength is considerably increased by the bead-like deformation. These beads can deviate from the one shown in FIG. 6 can also be depressed in such a way that the convex part points towards the interior of the plate 2. In Fig. 7, the tips 6 or the flanks of the prongs 3 are arrow-shaped so that they largely prevent unintentional loosening due to the barb-like projections of the notches. The invention is not restricted to the exemplary embodiments described, but also extends to the use of the types of belt connectors not listed here which are suitable for this purpose. Patent claims: 1. Heel with embedded fasteners that protrude on the contact side and to establish the connection with a heel stump can be sunk into the latter, marked by an embedded metal plate (2), known per se, with prongs bent on one side out of the plane of the plate (3) in the form of a belt connector of a commercially available type. 2. Heel according to claim 1, characterized in that the prongs (3) in row arrangements are offset from one another within the row and / or with respect to other rows. 3. Heel according to claims 1 and 2, characterized in that its in known Way concave upward contact surface (5), the web surface (2) of the prongs (3) and its running surface (4) run parallel. 4. heel according to claims 1 to 3, characterized in that the flanks of the Prongs (3) have depressions and / or projections in the manner of barbs, so that when Penetration of the prongs into the heel stump the friction is less than when moving in reverse direction. Considered publications:
German Patent No. 339 811;
U.S. Patent Nos. 1,368,902, 1,895,469,
2 005 775. 1 sheet of drawings 709 707/160 11.67 © BundesdruckereiBerIin