FR2464396A1 - FASTENER - Google Patents

Abstract

FIXING BODY COMPOSED OF 2 PARTS FOR THE ASSEMBLY, WITH POSSIBILITY OF SUBSEQUENT DESOLIDARIZATION, OF PARTS IN THE FORM OF FLAT PLATES, CONSISTING OF AN ANCHORING END WHICH IS EQUIPPED WITH A RETAINING COLLAR AND 2 EXPANDABLE BRACKETS INTRODUCE INTO SQUARE-SHAPED FIXING OPENINGS WHICH INCLUDE THE PLATES TO BE ASSEMBLED. THE ANCHORING END AND THE EXPANDABLE PART ARE MADE OF THE SAME HARD ELASTIC PLASTIC MATERIAL, AND ARE MADE IN ONE OF THE OTHER BY CONNECTING POINTS AND RIBS COME FROM MOLDING WHICH BREAK UNDER THE EFFORT OF INTRODUCTION 12. THE PRESENT INVENTION APPLIES IN PARTICULAR TO THE REMOVABLE FIXATION OF PLATES BETWEEN THEM.

Description

The invention relates to a fixing member

  a two-part arrangement allowing the assembly, with the possibility of subsequent separation, of flat plate-shaped parts, which consists of an anchoring end, provided with a retaining flange and with two expansible tabs which are introduced and get

  create in the rectangular-shaped fixing holes that

  for this purpose the plates to be assembled, and an expansi

  anchored in the anchoring end, which has a rotating head, an expandable plug of rectangular section to separate the expandable legs, and a shoulder with a collar

  cylindrical connecting the rotating head the expandable ankle,

  while in the retaining collar of the end

  anchoring tee a rectangular recess corresponding to the section of the expandable ankle and the center of this recess, the

  of its long sides, circular cutouts cor-

  corresponding to the diameter of the collar shoulder, and that are

  Furthermore, at the small sides of the expandable ankle, spaced apart from the underside of the rotating head, resilient legs which form the end thereof, including the shoulders, during the introduction of the shoulder collar in the cuts

  circular, come snap under the edge of the collar.

  Fasteners of this type are used to connect

  parts in the form of flat plates in such conditions that it is possible at any time to separate them again

quickly.

  According to the description of the model of

  Germany 6 908 401 such a fastener is known, consists of

  in this case a metal receiver socket in the-

  it introduces an expandable peg with flats, made of plastic. The expandable walls of the socket

  In this case, starting from the flange of

  held, slightly arched outward about one-third

  its total length, and from there to their extremes again

  calves tightened towards each other under conditions such as

  the fact of turning the expandable ankle introduced

  diverts the walls in question.

  The fixing process takes place in this case under conditions such that the insertion sleeve is inserted into the rectangular opening of the support plate, during which operation the expandable tabs during their passage through the hole fastening, start first

  by getting closer to each other, and then move away again

  calf by elastic effect, so that the introducer sleeve

  tion is thus maintained in the support plate. The hair

  the expansible is then introduced into the rectangular opening of the retaining flange plate until the elastic branches snap behind the edge of the flange. At this stage the plate that one wishes to fix on the

  support plate can then be applied at the level of the opening

  rect rectangular it includes for this purpose, on the legs ex-

  expandable, and just turn the expandable ankle

  of 9Q0, an operation which compresses the expandable legs towards the ex-

  and results in an assembly of the two plates, which are thus securely applied against each other. If it is then desired to separate these two plates, then simply rotate the expandable peg 90 in the other direction. The expandable legs then come closer,

  and the insert plate can be removed from the carrier plate.

  This anchoring system, however, has 1 '

  disadvantage that its two constituent elements are respectively

  made in a different subject and must be of

  made by hand. The introduction of the receiving socket

  this metal in the fastening openings as well as its

  also require the implementation of an important effort

  as a penalty which is perceived as a disadvantage

  is lying. The invention therefore aims to improve 1 '

  fastener described in the foregoing under conditions

  and a proportion such that its manufacture is simpler and cheaper and that the assembly and

  disassembly can be performed without problems.

  According to the invention, this object is achieved by the fact that the expansible part and the anchoring end are made of the same hard elastic plastics material, and are obtained integral with each other by means of binding came tearing mold under the stress, and by the

  the outer walls of the expandable legs are parallel

  to the other in the area below the rotating head, so that the sleeve can be

  be introduced without resistance being encountered in

  mounting angles of the plates to be assembled together.

  In addition, in the configuration

  Another improvement, compared to the known fastener, is that the rectangular-shaped recess in the flange of the anchoring end is oriented in such a way that its

  longitudinal axis is transversely arranged in relation to the

  the expansibles reacting elastically in the lateral plane, so that when the expandable ankle is introduced

  at the same time move apart the legs expansi-

  ble. The plate of diagrams illustrates an embodiment of the invention, which we will comment more on

  details in the following. The different illustrations represent

  respectively: Figure 1 - A fastener made

  made of plastic, viewed from the side, with a sectional view of the end

anchor tee.

  Figure 2 - The fastener, seen from

this.

  Figure 3 - A cut through the collar

  cylindrical part of the expandable part, following III - III figure 2.

  Figure 4 - A cut through the hair

  expandable city, following IV - IV, figure 1.

  Figure 5 - The fastener before its

  introduction into the fixing apertures of the assembly plates

blossom together.

  Figure 6 - The fastener after its

  introduction into the plate fixing apertures, in posi-

  anchoring, and Figure 7 - the fastener in the released position.

  The fastener illustrated by the drawings

  mas consists essentially of an anchor end (1) and

  an expansible part (4) that comes to slip into it.

  Both elements are made of elastic plastic material

  lasts in the same mold, and is obtained in solidarity with one of the

  by means of points or connecting ribs (12) integrally molded. The anchoring end (1) consists in this case of a retaining flange (2) preferably having a square shape, having in its central part a recess of rectangular shape, and both sides of this recess ( 9) at its small sides, expandable tabs (3) and (3 ') capable of reacting or elastically deformed, and arranged substantially at right angles. They comprise, below the retaining collar (2), outer walls (13) and (13 ')

  parallel to each other, to which

  at the lower third of the expandable legs (3) and

  (3 ') of the introduction surfaces (19) and (19') which converge

  with a conical orientation, the inner walls correspond to

  tes (20) and (20 ') presenting in this sector, in this case also

conic convergence.

  The expansible part (4) has in

  a square expansible peg (7) of the same section as the

  rectangular element (9). This expandable peg has at its bottom a wedge-shaped beveled length and at its upper part a rotating head (5) by means of which

  the fitter can push the expandable ankle (7) into the end

  anchoring tee (1) and to imprint inside it a mold

rotation.

  The rotating head (5) has for this purpose a flat (21) on which are applied the thumb and forefinger of the editor, and which is mini fine flutings (22) to ensure a better grip. Under the flat surface (21) there is a circularly shaped support plate (23) which, during the introduction of the

  expandable ankle is applied against the upper part--

  re of the retaining flange (2). The expandable ankle (7)

  is connected to the rotating head (5) by means of an intermediate piece

  diar (24) of reduced section, and a shoulder with a cylindrical collar.

  drique (6) connecting to it. We find on both

  narrow sides of the expandable ankle (7), and substantially at the height of the intermediate piece (24) of the elastic branches

  (8) and (8 ') elastically compressible, which, during the introduc-

  expandable ankle (7), snap into the recess

  (9) at their shoulders (25), under the flange (11)

  of the retaining collar (2), so that the ankle ex-

  tube (7) is locked in its position of

  is lying. For this purpose, the rectangular-shaped recess (9) has, in its central part and at its long sides, circular-shaped cutouts (10) and (10 ') which act as

  housing and bearing support for the collar shoulder (6).

  As shown in Figures 5 - 7,

  the task of the securing body concerned is to ensure the assem-

  blage of two plates (15) and (16) arranged one on the other or contiguous, under conditions allowing them to be separated from one another

  then easily at any time. For this purpose the end of

  crest (1) carrying the two expansible legs (3) and (3 ') is

  produced in the fastening apertures (14) and (17) of the two plates (15) and (16), which are made to coincide precisely, and

  the expandable ankle pushed into it, an operation which provokes

  that at the same time the break-up of the connection points

  ge (12), and the spacing of the inner walls (20) and (20 ') 1 from each other. It follows that the outer walls (13) and (13 ') are applied by the mechanical action resulting from

  their shape, on the rear part of the insert plate (16)

  the flange (18) of the hole (17), so that the two plates (15) and (16) are securely connected to one another.

to the other.

  If one wishes later to dissociate

  again to those plates (15) and (16) from each other, it

  It is then sufficient to print at the rotating head (5) a simple movement

  90 and the expandable legs (3) and (3 ') then return to their initial position, and the fastener in its entirety can be removed from the superposed openings (14).

and (17).

  To make the fixing process also

  fast and as simple as possible, the recess (9) of the adhesive

  retainer (2) has its transverse longitudinal axis

  relative to the expansible tabs (3) and (3 '), so that the introduction of the expandable peg (7) causes

  immediately the spacing of the latter from one another.

Claims (2)

R e v e n d i c t i o n s   1 - Fixing organ composed of two parts   parts for assembly, with the possibility of subsequent disconnection   upper part, flat plate-shaped parts, consisting of an anchor end, which is provided with a retaining flange and two expandable tabs which are introduced and anchored in the square-shaped fastening apertures that entails   effect the plates to be assembled together, and an expansi-   ble in the anchoring end, which includes a head   rotating, an expandable peg of rectangular section to separate the expansible tabs from each other, and a cylindrical collar shoulder connecting the rotating head and the expandable peg, while provided in the flange   retaining end of the anchoring end a rectangular recess cor-   corresponding to the section of the expandable ankle, as well as in the central part of this recess, and at the level of its large   sides, circular cutouts corresponding to the diameter   the shoulder with a collar, and which are furthermore arranged, at the small sides of the expandable ankle, spaced from the underside of the rotating head, elastic limbs which   constitute the end, including the shoulders, during the in-   troduction of the collar shoulder in the circular cut-outs   snap under the flange of the collar, s e   It is important to note that the extremes   anchoring tee (1) and the expanding part (4) are made in   the same hard elastic plastic material, and are made   connected to one another by connection points or molded ribs which break under the insertion force, (12) and that the outer walls (13) of the expandable tabs (3) are arranged in parallel to each other in the area under the rotating head (5).   2 - Fixing member according to the   cation 1, characterized in that the rectangular-shaped recess (9) which the flange (2) of the anchoring end (1) has has its longitudinal axis oriented transversely by   relative to the position of the expandable legs (3).