FR2771956A1 - CLAMP JAW FOR KEY REPRODUCING MACHINES - Google Patents

Abstract

The invention relates to a jaw for key reproduction machines, in particular for the reproduction of keys known, under the name of "flat keys", to have a flat bit of which the mechanical coding part basically resides in its flat faces, the same goes for that of keys in which the bits have cross sections of various configurations that are more complex to work with, as are, among others, hollow circular bit keys, called vase-shaped, and double "T" keys. ", the jaw consisting of a movable part (1) which is arranged between two fixed parts, namely a first fixed part (2) and a second fixed part (3), and which, perpendicular to the direction of its movement , has two opposite gripping edges, namely a first edge (4) and a second edge (5), which edges, in said direction of movement, remain respectively opposite third and fourth gripping edges (6 and 7) belonging respectively to the first and second fixed parts (2 and 3), the first and second gripping edges (4 and 5) being cut according to respective gripping profiles which are mutually different and which are functionally opposite to other gripping profiles cut into said third and fourth gripping edges (6 and 7) in front of which they are placed correspondingly, said movable part (1) being functionally mounted on a worm (8) which extends between said first and second fixed parts (2 and 3).

Description

The present invention relates to a clamping jaw

  particularly advantageous, which is specially designed for the work of reproducing known keys, under the name of "flat keys", to have a flat bit whose mechanical coding part is fundamentally located in the plane faces, unlike so-called keys "serrated" or "edge" which, although also having a flat bit, carry their part of basic mechanical coding on the edge of the bit. Similarly, this new jaw advantageously applies to keys having bits with non-planar cross sections, which require more complex mechanical coding work (for example keys with hollow circular section, keys with double "T", keys

polygonal, etc.).

  Naturally, the key reproduction machines are equipped with a set of two jaws, one for the original key which must be copied or reproduced, and the other for the blank key, or blank, in which the mechanical coding will be cut. of the original key. Consequently, the invention applies to one and the other of the two jaws of the machine. It will also be understood that, in the

  present description, a jaw designates a clamping assembly comprising

two jaws.

  The aforementioned serrated or edge keys have a high degree of standardization and do not involve any significant drawback in the models

  current breeding machines.

  However, when one undertakes to reproduce the keys, cited above

  above, with flat bit which carries the encryption part on its flat faces (the "flat keys"), or keys with hollow circular bit, double "T", etc., due to the great diversity of existing configurations ( the degree of standardization is low), current reproduction machines need to have a set of different jaws to be able to install the appropriate jaw at a given time depending on the configuration of the key to be reproduced; this is due to the fact that each jaw is composed of two unique parts, one movable and the other fixed, between which the corresponding key (the original key or the blank) must be maintained by means of the respective transverse edges of these pieces, which are tightened against each other and which, for this purpose, have been cut with various profiles, according to the

  type of key bit to reproduce.

  From this situation, it is deduced, on the one hand, that it is necessary to have the set of jaws necessary for the different distinct types of keys to be reproduced. On the other hand, we must take the trouble to replace one type of jaw with another each time the key to be reproduced is not compatible with the jaw which, at

  at the moment considered, is installed on the machine.

  In view of this state of affairs, the invention proposes a new concept of jaw which is distinguished as much by the simplicity of its constitution as by the advantages which one derives from its use. The new recommended jaw consists of a moving part which

  is arranged between two fixed parts, a first and a second, and which, perpen-

  particularly in the direction of its movement, has two opposite gripping edges, a first and a second, which, in said direction of

  displacement, are maintained respectively each in front of an edge of grip

  respective dimensions of the fixed parts, the respective edges of the fixed parts being designated as a third and a fourth edge, the first and second edges of

  gripping being cut according to respective gripping profiles which are mutual-

  slightly different and which are functionally opposite to the gripping profiles

  cut in said gripping edges which face them correspondingly

  dante, namely the third and fourth edges, said movable part being function-

  nally mounted on a worm which extends between said first and

second fixed parts.

  In summary, this new jaw constitution incorporates in itself-

  even a double jaw, since the movable part can cooperate with one or the other of the two fixed parts which surrounds it in each assembly forming the

new jaw.

  By ensuring, as is done in the invention, that the movable part has on its two transverse sides respective gripping edges which each have a distinct configuration conforming to the gripping edge of the fixed part opposite which it is located , we obtain important advantages according to

  which a reproduction machine with new jaws sees automatically

  only its required set of jaws halved compared to that which

  is until now necessary in known machines.

  This translates into a very significant saving in terms of the material cost of the constituent elements, which are of a high price. There is also a saving in terms of the number of jaw replacement operations, which, in addition to the significant time saving that this entails, makes the

  much easier work and better serve the client.

  Another remarkable advantage of the invention is that it makes possible a

  very simple design and that it is compatible with reproduction machines

  classic type duction, so that, in known machines, we can

  replace the conventional jaws with those of the invention.

  Preferably, in one or other of the third and fourth edges of the respective fixed parts of the machine according to the invention, an angular notch has been formed which acts in cooperation with the edge in front of which it is correspondingly located, namely the first or the second gripping edge, of the moving part being in an intermediate position of its working path, which determines three planes of tangency which circumscribe a circle of diameter equal to the periphery of a bit wrench hollow circular, this angular notch being extended, at its apex, by a bisecting groove, which extends in the direction of said movement of the moving part and whose depth and width have dimensions corresponding inversely to those of a radial fin that said hollow circular bit key has to guide its insertion into the lock. To allow a better understanding of the nature of

  the invention, there is shown, in the accompanying drawings, an industrial embodiment

  preferred trielle, which however has the character of a simple illustrative example and is in no way limiting Figure 1 shows a key duplication machine, provided with

  jaws according to the invention, in front view.

  Figure 2 is an enlarged view of the detailed part II which is surrounded in Figure 1, which, in turn, has received a partial enlargement in

  correspondence with one of the two jaws.

  Figures 3 and 5 show, in a plan view, one of the jaws according to the invention, associated with two different flat keys, a first key (11) and a second key (12), which are arranged between the part mobile (1) and the

first fixed part (2).

  Figures 4 and 6 are corresponding front views of the jaws of Figures 3 and 5, where we see the section of the flat bit of the first and second

respective keys (11 and 12).

  Figures 7 and 9 are views similar to those of Figures 3 and 5, o a hollow circular bit key, also called vase-shaped key, (13) and a double "T" key (14) are respectively placed between the moving part (1) and the

second fixed part (3).

  Figures 8 and 10 are front views similar to those of

  Figures 4 and 6, but applicable respectively to Figures 7 and 9.

  Figure 11 is a side view corresponding to the double key "T"

(14) of Figure 9.

  In connection with the drawings and the references cited above, the new concept of jaw for key duplication machines is illustrated on the appended plates (FIG. 1), this new jaw being specially intended for flat keys (11, 12) ( Figures 3 to 6), as well as special bit keys, for example vase-shaped keys (13) (Figures 7 and 8), double "T" keys

  (14) (Figures 9 to 11), to cite only a few possible models.

  According to the invention, the new concept of jaw is fundamentally

  mentally by determining, for each station of the machine (one station for the original key and another for the blank), a kind of double jaw consisting of a movable part (1) which is located between two fixed parts, a

  first fixed part (2) and a second fixed part (3), which has, perpendicular

  cularily to the direction of its movement, two opposite gripping edges, namely a first edge (4) and a second edge (5), which edges, in said direction of displacement, remain respectively opposite the third and fourth gripping edges belonging respectively to the first and second fixed parts, the first and second gripping edges (4 and 5) being cut according to respective gripping profiles which are mutually different and which are functionally opposite to the gripping profiles of said third and fourth gripping edges ( 6 and 7) opposite which they are correspondingly, said movable part (1) being functionally mounted on a screw

  endless (8) which extends between said first and second fixed parts (2 and 3).

  According to the invention, it is provided that, in one of said third and fourth gripping edges (6 and 7) of the first and second fixed parts (2 and 3), an angular notch (9) is produced so as to act in cooperation with the edge in front of which the notch is correspondingly located, namely said first or said second gripping edge (4 or 5), of the movable part (1) situated in an intermediate position of its working path , so that three tangency planes are determined which circumscribe a circle of diameter equal to that of the periphery of a vase-shaped key (13), this angular notch (9) being extended, at its top, by a groove bisector (10) which extends in the direction of said movement of the moving part (1) and the depth and width of which have dimensions corresponding, conversely, to the radial fin which has a vase-shaped key ( 13) to allow insertion of mistletoe dée in

the lock.

  The new jaw concept offers great flexibility of use.

  tion, which is illustrated by means of Figures 3 to 10, where we can see how the moving part (1) cooperates with the first fixed part (2) to treat (Figures 3 to 6) of the first and second flat wrenches (11 and 12), with the second movable part (3) for treating (FIGS. 7 to 10) respectively a vase-shaped key (13) and a double "T" key (14) such as that shown in FIG. 11. This New Jaw Concept Delivers the Significant Benefits Already Reported - Reducing the Jaw Set for Each Machine in Half and Saving Jaw Replacement Operations

  more convenient and improves the service offered to the customer.

  Of course, those skilled in the art will be able to imagine, from the

  device whose description has just been given for illustrative purposes only and

  in no way limiting, various variants and modifications not departing from the scope of the invention.

Claims (2)

  1. Jaw for key reproduction machines, in particular for the reproduction of known keys, under the name of "flat keys" (11, 12), in order to have a flat bit whose mechanical coding part resides fundamentally in its faces flat, as for that of keys in which the bits have cross sections of various configurations more complex to work with, as are, among others, the hollow circular bit keys, called vase-shaped, (13) and the double "T" keys (14), the jaw being characterized in that it consists of a moving part (1) which is disposed between two fixed parts, namely a first fixed part (2) and a second part fixed (3), and which, perpendicular to the direction of its movement, has two opposite gripping edges, namely a first edge (4) and a second edge (5), which edges, in said direction of movement, remain respected vement opposite the third and fourth gripping edges (6 and 7) belonging respectively to the first and second fixed parts, the first and second gripping edges (4 and 5) being cut according to respective gripping profiles which are mutually different and which are functionally opposite to other gripping profiles cut in said third and fourth gripping edges (6 and 7) opposite which they are placed in a corresponding manner, said movable part (1) being functionally mounted on an endless screw (8) which extends between said first and second fixed parts (2 and 3).   2. Jaw for key duplicating machines, as claimed   cation 1, characterized in that, in one of said third and fourth gripping edges (6 and 7) of the first and second fixed parts (2 and 3), an angular notch (9) has been formed which acts in cooperation with the edge opposite which it is correspondingly, namely said first or said second gripping edge (4 or 5), of the moving part (1) being in an intermediate position of its working path, which determines three planes of tangency which circumscribe a circle of diameter equal to that of the periphery of a hollow circular bit key (13), this angular notch (9) being extended at its top by a bisecting groove (10), which s extends in the direction of said movement of the moving part (1) and whose depth and width have dimensions corresponding inversely to those of a radial fin that has said hollow circular bit key (13) to guide its insertion n in the lock.